def __init__(self, graphics_scene, parent=None):
        super(ESGraphicsViewController, self).__init__(parent)

        self.logger = logging.getLogger("GraphicsView")

        self.graphics_scene = graphics_scene

        self._init_ui()
        self.setScene(self.graphics_scene)

        self.mode = Mode.NO_OP  # no operation

        self.zoom_in_factor = 1.1
        self.zoom_clamp = True
        self.zoom = 0
        self.zoom_step = 1
        self.zoom_range = [-20, 1]

        self.drag_edge = None
        self.drag_start_socket = None

        # to deal with event observers
        self.drag_enter_observers = Observable()
        self.drop_observers = Observable()
        self.block_selected_observers = Observable()
        self.no_block_selected_observers = Observable()
        self.invalid_edge_observers = Observable()

        self.update()
        self.show()
    def __init__(self, block_controller, music_controller=None):
        self.logger = logging.getLogger("Interaction Controller")

        self.block_controller = block_controller
        self.music_controller = music_controller
        self.robot_controller = None
        self.wakeup_thread = None
        self.animation_thread = None
        self.engagement_thread = None
        self.face_tracker_thread = None
        self.timer_helper = TimerHelper()
        self.music_command = None
        self.animations_lst = []
        self.animation_time = 0
        self.animation_counter = -1
        self.robot_volume = 50

        self.robot_ip = None
        self.port = None
        self.robot_name = None

        self.engagement_counter = 0
        self.is_ready_to_interact = False
        self.current_interaction_block = None
        self.previous_interaction_block = None
        self.interaction_blocks = None
        self.interaction_design = None

        self.stop_playing = False
        self.execution_result = None
        self.has_finished_playing_observable = Observable()
    def __init__(self, session):

        self.logger = logging.getLogger("Speech Handler")

        self.session = session

        self.tts = self.session.service("ALTextToSpeech")
        self.animated_speech = self.session.service("ALAnimatedSpeech")
        self.memory = self.session.service("ALMemory")
        self.speech_recognition = self.session.service("ALSpeechRecognition")
        self.audio = session.service("ALAudioDevice")

        self.keyword_observers = Observable()

        self.speech_certainty = 0.4
        self.voice_pitch = 100
        self.voice_speed = 85

        self.current_keywords = []
        self.is_listening = False
        self.start_time = time.time()

        # add a listener to the keyword stream
        self.keyword_listener = None
        self.keyword_events(subscribe=True)
    def __init__(self, block_controller, music_controller=None):
        super().__init__()
        self.logger = logging.getLogger("Interaction Controller")

        self.block_controller = block_controller
        self.music_controller = music_controller
        self.db_stream_controller = DBStreamController()
        self.timer_helper = TimerHelper()
        self.music_command = None
        self.animations_lst = []
        self.animation_time = 0
        self.animation_counter = -1
        self.robot_volume = 50

        self.robot_name = None
        self.robot_realm = None

        self.current_interaction_block = None
        self.previous_interaction_block = None
        self.interaction_module = None
        self.comm_style = CommunicationStyle.UNDEFINED
        self.is_interacting = False
        self.face_size_dict = {}

        self.execution_result = None
        self.executed_blocks = []
        self.tablet_input = None
        self.has_finished_playing_observers = Observable()
        self.threads = []
        self.on_connected_observers = Observable()

        self.start_listening_to_db_stream()
    def __init__(self, session):

        self.logger = logging.getLogger("TabletHandler")
        self.session = session

        # add a listener to the tablet input stream
        self.session.subscribe(self.on_tablet_input,
                               "rom.optional.tablet_input.stream")
        self.tablet_input_observers = Observable()
        self.is_listening = False
    def __init__(self):
        super(Scene, self).__init__()
        Observable.__init__(self)

        self.logger = logging.getLogger("Scene")

        self.blocks = []
        self.edges = []

        self.graphics_scene = ESGraphicsScene(self)

        self.history = SceneHistoryController(self)
class EngagementHandler(object):

    def __init__(self, session):
        self.logger = logging.getLogger("EngagementHandler")

        self.session = session

        self.last_time_detected = 0  # log the time
        self.notification_interval = 1  # seconds
        self.detected_faces_lst = []

        # observers
        self.face_detected_observers = Observable()

        # subscribe to face events
        self.session.subscribe(self.on_face_detected, "rom.optional.face.stream")

    @inlineCallbacks
    def on_face_detected(self, frame):
        self.logger.info("Face detected: {}".format(frame))
        try:
            if frame is None or len(frame) == 0:
                yield sleep(1)
            else:
                detected_face = frame["data"]["body"]
                # skip empty frames
                if detected_face and len(detected_face) > 0:
                    # check face size
                    face_size = frame["data"]["body"][0][2]
                    self.detected_faces_lst.append(face_size)
                    # > x seconds: notify observers
                    detection_interval = time.time() - self.last_time_detected
                    if detection_interval >= self.notification_interval:
                        self.logger.info("Detected a face: {} | after {}s".format(frame["data"],
                                                                                  detection_interval))
                        self.last_time_detected = time.time()
                        face_size = max(self.detected_faces_lst)
                        self.detected_faces_lst = []
                        self.face_detected_observers.notify_all(face_size)

                    yield sleep(1)
                else:
                    yield sleep(1)
        except Exception as e:
            self.logger.error("Error while receiving the detected face: {}".format(e))
            yield sleep(1)

    def face_detection(self, start=False):
        # start/close the face stream
        self.session.call("rom.optional.face.stream" if start else "rom.optional.face.close")

    def face_tracker(self, start=False):
        self.session.call("rom.optional.face.face_tracker", start=start)
    def __init__(self, session):

        self.logger = logging.getLogger("TabletHandler")
        self.session = session

        self.tablet_service = self.session.service("ALTabletService")
        self.memory = self.session.service("ALMemory")

        # TODO: add a listener to the tablet input stream
        self.tablet_input_listener = self.memory.subscriber("TabletInput")
        self.tablet_input_listener.signal.connect(self.on_tablet_input)

        self.tablet_input_observers = Observable()
        self.is_listening = False
    def __init__(self, session):
        self.logger = logging.getLogger("EngagementHandler")

        self.session = session

        self.last_time_detected = 0  # log the time
        self.notification_interval = 1  # seconds
        self.detected_faces_lst = []

        # observers
        self.face_detected_observers = Observable()

        # subscribe to face events
        self.session.subscribe(self.on_face_detected, "rom.optional.face.stream")
class ConnectionHandler(object):
    def __init__(self):
        self.logger = logging.getLogger("Connection Handler")
        self.rie = None
        self.session_observers = Observable()
        self.session = None

    @inlineCallbacks
    def on_connect(self, session, details=None):
        self.logger.debug("Created session: {}".format(session))
        self.session = session
        yield self.session_observers.notify_all(session)

    def start_rie_session(self, robot_name=None, robot_realm=None):
        try:
            if robot_realm is None:
                # get the realm from config
                name_key = "pepper" if robot_name is None else robot_name.lower(
                )
                robot_realm = config_helper.get_robot_settings(
                )["realm"][name_key]
            self.logger.info("{} REALM: {}".format(robot_name, robot_realm))

            self.rie = Component(transports=[{
                'url': u"wss://wamp.robotsindeklas.nl",
                'serializers': ['msgpack'],
                'max_retries': 0
            }],
                                 realm=robot_realm)
            self.logger.info("** {}".format(threading.current_thread().name))
            self.rie.on_join(self.on_connect)

            self.logger.info("Running the rie component")
            run([self.rie])
        except Exception as e:
            self.logger.error("Unable to run the rie component | {}".format(e))

    def stop_session(self):
        try:
            if self.session:
                self.session.leave()
                self.session_observers.notify_all(None)
                self.logger.info("Closed the robot session.")
            else:
                self.logger.info("There is no active session.")
        except Exception as e:
            self.logger.error("Error while closing rie session: {}".format(e))
예제 #11
0
    def __init__(self, scene, start_socket, end_socket=None, edge_type=EdgeType.BEZIER):
        super(Edge, self).__init__()
        Observable.__init__(self)  # explicit call to second parent class

        self.logger = logging.getLogger("Edge")

        self.scene = scene

        # init sockets
        self.start_socket = start_socket
        self.end_socket = end_socket

        self.graphics_edge, self.__edge_type = (None,) * 2
        self.edge_type = edge_type

        # add edge to the scene
        self.scene.add_edge(self)
    def __init__(self, session):

        self.logger = logging.getLogger("Speech Handler")

        self.session = session

        self.keyword_observers = Observable()

        self.speech_certainty = 0.4
        self.voice_pitch = 100
        self.voice_speed = 85

        self.current_keywords = []
        self.is_listening = False
        self.start_time = time.time()

        # add a listener to the keyword stream
        self.session.subscribe(self.on_keyword, "rom.optional.keyword.stream")
    def __init__(self,
                 block,
                 index=0,
                 position=Position.BOTTOM_LEFT,
                 socket_type=SocketType.INPUT,
                 edge_limit=-1):
        super(Socket, self).__init__()
        Observable.__init__(self)  # explicit call to second parent class

        self.logger = logging.getLogger("Socket")

        self.block = block
        self.index = index
        self.position = position
        self.socket_type = socket_type
        self.edge_limit = edge_limit

        self.edges = []
        self._init_graphics()
    def __init__(self, block_controller, music_controller=None, parent=None):

        self.logger = logging.getLogger("SimulationController")
        self.block_controller = block_controller
        self.music_controller = music_controller
        self.user_input = None
        self.interaction_log = None
        self.simulation_dock_widget = None
        self._init_dock_widget(parent)
        self.user_turn = False
        self.timer_helper = TimerHelper()
        self.animations_lst = []

        self.current_interaction_block = None
        self.previous_interaction_block = None
        self.connecting_edge = None
        self.execution_result = None
        self.stop_playing = False
        self.finished_simulation_observable = Observable()
    def __init__(self, session):
        self.logger = logging.getLogger("EngagementHandler")

        self.session = session

        self.memory = self.session.service("ALMemory")
        self.face_service = self.session.service("ALFaceDetection")
        self.tracker = self.session.service("ALTracker")

        self.tracker_face_size = 0.1
        self.last_time_detected = 0  # log the time
        self.notification_interval = 1  # seconds

        # observers
        self.face_detected_observers = Observable()
        self.face_subscriber = None

        # subscribe to face events
        self.face_events(subscribe=True)
    def add_data_observer(self, data_key, observer):
        try:
            if data_key not in self._db_change_observers_dict.keys():
                self._db_change_observers_dict[data_key] = Observable()

            self._db_change_observers_dict[data_key].add_observer(observer)
        except Exception as e:
            self.logger.error(
                "Error while adding observer '{}' to '{}' | {}".format(
                    observer, data_key, e))
    def __init__(self, block, parent=None, bg_color=None):
        super(ESGraphicsBlock, self).__init__(parent=parent)
        Observable.__init__(self)

        self.block = block
        self.logger = logging.getLogger("GraphicsBlock")

        # properties
        block_size_settings = config_helper.get_block_size_settings()
        self.width = block_size_settings["width"]
        self.height = block_size_settings["height"]
        self.rounded_edge_size = block_size_settings["rounded_edge_size"]
        self.title_height = block_size_settings["title_height"]

        self._padding = 5.0
        self.is_moved = False

        # pen
        block_colors = config_helper.get_colors()
        self._default_pen = QPen(QColor("#{}".format(block_colors['pen']['default'])))
        self._default_pen.setWidthF(2.0)
        self._selected_pen = QPen(QColor("#{}".format(block_colors['pen']['selected'])))
        self._selected_pen.setWidthF(block_size_settings["selected_pen_width"])

        self._title_brush = QBrush(QColor("#{}".format(block_colors['brush']['block_title'])))
        self._bg_brush = QBrush(QColor("#{}".format(
            block_colors['brush']['block_bg'] if bg_color is None else bg_color)))

        # set title
        self.__title = ""
        self._init_title()

        # init sockets
        self._init_sockets()

        # init content
        self._init_content()

        # init ui
        self._init_ui()
    def __init__(self,
                 scene,
                 title="Start",
                 socket_types=[],
                 pos=[],
                 parent=None,
                 icon=None,
                 output_edges=1,
                 bg_color=None):
        super(Block, self).__init__()
        Observable.__init__(self)  # explicit call to second parent class

        self.logger = logging.getLogger("Block")

        self.scene = scene
        self.parent = parent  # any container
        self.graphics_block = None
        self.bg_color = bg_color

        self.icon = icon
        self.title = title  # is also the pattern name

        self.inputs = []
        self.outputs = []

        self.socket_spacing = 22

        self._init_ui(socket_types, pos, output_edges)

        # add observers
        self.editing_observers = Observable()
        self.settings_observers = Observable()

        # add editing/settings listeners
        self.content.editing_icon.clicked.connect(
            lambda: self.editing_observers.notify_all(event=self))
        self.content.settings_icon.clicked.connect(
            lambda: self.settings_observers.notify_all(event=self))

        # add block to the scene
        self.scene.add_block(self)
예제 #19
0
    def __init__(self, scene, parent=None):
        super(BlockManagerWidget, self).__init__(parent)

        self.logger = logging.getLogger("BlockManagerWidget")

        self._init_ui(scene)

        # Observables
        self.drag_enter_observers = Observable()
        self.drop_observers = Observable()
        self.block_selected_observers = Observable()
        self.no_block_selected_observers = Observable()
        self.invalid_edge_observers = Observable()
        self.right_click_block_observers = Observable()
예제 #20
0
class BlockManagerWidget(QWidget):
    def __init__(self, scene, parent=None):
        super(BlockManagerWidget, self).__init__(parent)

        self.logger = logging.getLogger("BlockManagerWidget")

        self._init_ui(scene)

        # Observables
        self.drag_enter_observers = Observable()
        self.drop_observers = Observable()
        self.block_selected_observers = Observable()
        self.no_block_selected_observers = Observable()
        self.invalid_edge_observers = Observable()
        self.right_click_block_observers = Observable()

    def _init_ui(self, scene):
        self.setGeometry(200, 200, 800, 600)

        # layout
        self.layout = QVBoxLayout()
        self.layout.setContentsMargins(0, 0, 0, 0)

        # Graphics scene
        self.scene = scene

        # Graphics View
        self.blocks_view = ESGraphicsViewController(self.scene.graphics_scene, self)

        # add observers
        self.blocks_view.drag_enter_observers.add_observer(self.on_drag_enter)
        self.blocks_view.drop_observers.add_observer(self.on_drop)
        self.blocks_view.block_selected_observers.add_observer(self.on_block_selected)
        self.blocks_view.no_block_selected_observers.add_observer(self.on_no_block_selected)
        self.blocks_view.invalid_edge_observers.add_observer(self.on_invalid_edge)

        # set layout
        self.layout.addWidget(self.blocks_view)
        self.setLayout(self.layout)

        self.setWindowTitle("Block Manager")

        self.update_widget()
        self.show()

    def update_widget(self):
        self.update()
        # self.blocks_view.update()

    def contextMenuEvent(self, event):
        item = self.get_item_at(event.pos())

        if hasattr(item, "block"):
            self.logger.debug("item has block attribute: {}".format(item))
            # notify observers
            self.right_click_block_observers.notify_all(event)

        super(BlockManagerWidget, self).contextMenuEvent(event)

    def get_scene_position(self, mouse_position):
        try:
            return self.blocks_view.mapToScene(mouse_position)
        except Exception as e:
            self.logger.error("Error while mapping mouse position to scene! {}".format(e))

    def zoom_scene(self, val):
        self.blocks_view.zoom_scene(delta_y=val)

    def get_item_at(self, pos):
        return self.blocks_view.itemAt(pos)

    def delete_selected(self):
        self.blocks_view.delete_selected()

    def clean_up(self):
        # called on exit
        del self.scene
        del self.blocks_view

    ###
    # Event Listeners
    ###
    def on_drag_enter(self, event=None):
        self.drag_enter_observers.notify_all(event)

    def on_drop(self, event=None):
        self.drop_observers.notify_all(event)

    def on_block_selected(self, event=None):
        self.block_selected_observers.notify_all(event)

    def on_no_block_selected(self, event=None):
        self.no_block_selected_observers.notify_all(event)

    def on_invalid_edge(self, event=None):
        self.invalid_edge_observers.notify_all(event)
class InteractionController(QtCore.QObject):
    face_detected_signal = Signal(float)

    def __init__(self, block_controller, music_controller=None):
        super().__init__()
        self.logger = logging.getLogger("Interaction Controller")

        self.block_controller = block_controller
        self.music_controller = music_controller
        self.db_stream_controller = DBStreamController()
        self.timer_helper = TimerHelper()
        self.music_command = None
        self.animations_lst = []
        self.animation_time = 0
        self.animation_counter = -1
        self.robot_volume = 50

        self.robot_name = None
        self.robot_realm = None

        self.current_interaction_block = None
        self.previous_interaction_block = None
        self.interaction_module = None
        self.comm_style = CommunicationStyle.UNDEFINED
        self.is_interacting = False
        self.face_size_dict = {}

        self.execution_result = None
        self.executed_blocks = []
        self.tablet_input = None
        self.has_finished_playing_observers = Observable()
        self.threads = []
        self.on_connected_observers = Observable()

        self.start_listening_to_db_stream()

    def connect_to_robot(self, robot_name=None, robot_realm=None, robot_ip=None, robot_port=None):
        self.robot_name = robot_name
        self.robot_realm = robot_realm

        self.db_stream_controller.update_one(self.db_stream_controller.interaction_collection,
                                             data_key="connectRobot",
                                             data_dict={"connectRobot": {"robotName": self.robot_name,
                                                                         "robotRealm": self.robot_realm,
                                                                         "robotIP": robot_ip,
                                                                         "robotPort": robot_port},
                                                        "timestamp": time.time()})

    def on_connect(self, data_dict=None):
        try:
            self.logger.info("Connect data received: {}".format(data_dict))
            if data_dict and data_dict["isConnected"] is True:
                self.logger.debug("Connected...")
                self.on_connected_observers.notify_all(True)
            else:
                self.logger.info("Robot is not connected!")
        except Exception as e:
            self.logger.error("Error while extracting isConnected: {} | {}".format(data_dict, e))

    def disconnect(self):
        try:
            self.logger.info("Disconnecting...")
            self.engagement(start=False)
            self.db_stream_controller.update_one(self.db_stream_controller.interaction_collection,
                                                 data_key="disconnectRobot",
                                                 data_dict={"disconnectRobot": True, "timestamp": time.time()})
            self.logger.info("Disconnection was successful.")
        except Exception as e:
            self.logger.error("Error while disconnecting: {}".format(e))

        return True

    def reset(self):
        self.execution_result = ""
        self.tablet_input = ""
        self.current_interaction_block = None
        self.previous_interaction_block = None
        self.executed_blocks = []

    def on_exit(self):
        self.logger.info("Exiting...")
        self.db_stream_controller.stop_db_stream()

    def stop_all_threads(self):
        # close all threads
        for thread in self.threads:
            try:
                thread.stop_running()
                thread.quit()
                thread.wait()
            except Exception as e:
                self.logger.error("Error while stopping thread: {} | {}".format(thread, e))
                continue

        self.threads = []

    def is_connected(self):
        success = False
        conn = None
        try:
            conn = self.db_stream_controller.find_one(self.db_stream_controller.robot_collection, "isConnected")
            if conn and conn["isConnected"] is True:
                success = True
        except Exception as e:
            self.logger.error("Error while extracting isConnected: {} | {}".format(conn, e))
        finally:
            return success

    def start_listening_to_db_stream(self):
        observers_dict = {
            "isConnected": self.on_connect,
            "isExecuted": self.on_block_executed,
            "isDisengaged": self.on_disengaged,
            "startInteraction": self.on_start_interaction,
            "tabletInput": self.on_tablet_input,
            "faceDetected": self.on_face_detected
        }
        self.db_stream_controller.start_db_stream(observers_dict=observers_dict,
                                                  db_collection=self.db_stream_controller.robot_collection,
                                                  target_thread="qt")

    def on_block_executed(self, data_dict=None):
        self.execution_result = ""

        try:
            if self.is_interacting is False:
                self.logger.info("Not in interaction mode!")
                return False

            self.logger.info("isExecuted data received: {}".format(data_dict))
            self.execution_result = data_dict["isExecuted"]["executionResult"]
            self.execute_next_block()
        except Exception as e:
            self.logger.error("Error while extracting isExecuted block: {} | {}".format(data_dict, e))

    def on_tablet_input(self, data_dict=None):
        self.tablet_input = ""
        self.execution_result = ""

        try:
            if self.is_interacting is False:
                self.logger.info("Not in interaction mode!")
                return False

            self.logger.info("Tablet data received: {}".format(data_dict))
            self.tablet_input = data_dict["tabletInput"]
            self.execution_result = data_dict["tabletInput"]
            self.execute_next_block()
        except Exception as e:
            self.logger.error("Error while extracting tablet data: {} | {}".format(data_dict, e))

    def on_face_detected(self, data_dict=None):
        try:
            self.logger.info("Received a detected face: {}".format(data_dict))
            self.face_detected_signal.emit(data_dict["faceDetected"])

            if self.is_interacting:
                self.face_size_dict["{}".format(time.time()).replace(".", "_")] = data_dict["faceDetected"]
        except Exception as e:
            self.logger.error("Error while extracting face size: {}".format(e))

    def on_disengaged(self, data_dict=None):
        try:
            self.logger.info("Disengaged data received: {}".format(data_dict))
            self.execution_result = ""
            self.stop_playing()
        except Exception as e:
            self.logger.error("Error while extracting disengaged data: {} | {}".format(data_dict, e))

    def update_speech_certainty(self, speech_certainty=40.0):
        self.db_stream_controller.update_one(self.db_stream_controller.interaction_collection,
                                             data_key="speechCertainty",
                                             data_dict={"speechCertainty": speech_certainty, "timestamp": time.time()})

    def update_db_data(self, data_key, data_value):
        self.db_stream_controller.update_one(self.db_stream_controller.interaction_collection,
                                             data_key=data_key,
                                             data_dict={data_key: data_value, "timestamp": time.time()})

    def wakeup_robot(self):
        success = False
        try:
            self.db_stream_controller.update_one(self.db_stream_controller.interaction_collection,
                                                 data_key="wakeUpRobot",
                                                 data_dict={"wakeUpRobot": True, "timestamp": time.time()})
            success = True
        except Exception as e:
            self.logger.error("Error while waking up the robot! | {}".format(e))
        finally:
            return success

    def rest_robot(self):
        try:
            self.db_stream_controller.update_one(self.db_stream_controller.interaction_collection,
                                                 data_key="restRobot",
                                                 data_dict={"restRobot": True, "timestamp": time.time()})
        except Exception as e:
            self.logger.error("Error while setting the robot posture to rest: {}".format(e))

    # TOUCH
    # ------
    def enable_touch(self):
        self.db_stream_controller.update_one(self.db_stream_controller.interaction_collection,
                                             data_key="enableTouch",
                                             data_dict={"enableTouch": True, "timestamp": time.time()})

    # BEHAVIORS
    # ---------
    def animate(self, animation_name=None):
        self.db_stream_controller.update_one(self.db_stream_controller.interaction_collection,
                                             data_key="animateRobot",
                                             data_dict={"animateRobot": {"animation": animation_name, "message": ""},
                                                        "timestamp": time.time()})

    def animated_say(self, message=None, animation_name=None):
        self.db_stream_controller.update_one(self.db_stream_controller.interaction_collection,
                                             data_key="animateRobot",
                                             data_dict={
                                                 "animateRobot": {"animation": animation_name, "message": message},
                                                 "timestamp": time.time()})

    def customized_say(self, interaction_block):
        if interaction_block is None:
            return

        interaction_block.interaction_start_time = time.time()
        block_to_execute = interaction_block.clone()
        if "{answer}" in block_to_execute.message and self.execution_result:
            block_to_execute.message = block_to_execute.message.format(answer=self.execution_result.lower())

        self.db_stream_controller.update_one(self.db_stream_controller.interaction_collection,
                                             data_key="interactionBlock",
                                             data_dict={"interactionBlock": block_to_execute.to_dict,
                                                        "timestamp": time.time()})

    # SPEECH
    # ------
    def say(self, message=None):
        to_say = "Hello!" if message is None else message
        if message is None:
            self.logger.info(to_say)
        self.animated_say(message=to_say)

    def on_start_interaction(self, data_dict=None):
        if self.is_interacting:
            self.logger.info("Interaction is in progress...")
            return False

        self.logger.info("Starting the interaction!")
        self.start_playing(int_block=self.get_starting_block())

    def start_playing(self, int_block):
        if int_block is None:
            self.is_interacting = False
            self.logger.warning("Couldn't start the interaction!")
            return False

        self.is_interacting = True

        self.previous_interaction_block = None
        self.current_interaction_block = int_block
        self.current_interaction_block.execution_mode = ExecutionMode.NEW
        self.logger.debug("Started playing the blocks")

        self.execute_next_block()  # start interacting

    def stop_playing(self):
        # self.tablet_image(hide=True)
        self.is_interacting = False
        self.db_stream_controller.update_one(self.db_stream_controller.interaction_collection,
                                             data_key="resumeEngagement",
                                             data_dict={"resumeEngagement": True, "timestamp": time.time()})

        self.has_finished_playing_observers.notify_all(True)
        self.logger.info("Stopped interacting.")

    def get_starting_block(self):
        try:
            # check if the scene contains a valid start block
            block = self.block_controller.get_block(pattern="start")
            if block is None:
                self.logger.warning("The scene doesn't contain a starting block! "
                                    "Please add a 'START' block to play the interaction!")
                return None

            self.logger.info("Found a starting block.")
            return block.parent
        except Exception as e:
            self.logger.error("Error while getting the start block: {}".format(e))
            return None

    def execute_next_block(self):
        try:
            self.logger.info("Executing next block.\n")
            # self.block_controller.clear_selection()
            connecting_edge = None

            # check for remaining actions; otherwise, continue
            if self.current_interaction_block.action_command and \
                    self.current_interaction_block.execution_mode is ExecutionMode.EXECUTING:
                self.execute_action_command()
            else:
                # check if the interaction has just started
                if self.previous_interaction_block is None:
                    self.previous_interaction_block = self.current_interaction_block
                else:
                    # get the next block to say
                    self.current_interaction_block, connecting_edge = self.get_next_interaction_block()

                if self.verify_current_interaction_block() is False:
                    return False

                # change the block status
                self.current_interaction_block.execution_mode = ExecutionMode.EXECUTING

                # update selection
                # self.current_interaction_block.set_selected(True)
                # if connecting_edge is not None:
                #     connecting_edge.set_selected(True)

                # send a request to say the robot message
                self.customized_say(interaction_block=self.current_interaction_block)
        except Exception as e:
            self.logger.error("Error while executing next block: {}".format(e))

    def get_next_interaction_block(self):
        if self.current_interaction_block is None:
            return None

        next_block = None
        connecting_edge = None

        self.logger.info("Getting the next interaction block...")
        try:
            # 1- Check for the design module and execute it
            if self.current_interaction_block.design_module and \
                    self.current_interaction_block.execution_mode is ExecutionMode.EXECUTING:
                self.execute_interaction_module()

            # 2- When the interaction module exists, get the next block from it
            if self.current_interaction_block.is_hidden and self.interaction_module:
                connecting_edge = None
                next_block = self.interaction_module.get_next_interaction_block(self.current_interaction_block,
                                                                                self.execution_result)
                # check if reached the end of the interaction_module
                if next_block is None and self.previous_interaction_block:
                    self.current_interaction_block = self.interaction_module.origin_block

            # 3- Otherwise, Get the next block from the current design
            if next_block is None:
                next_block, connecting_edge = self.current_interaction_block.get_next_interaction_block(
                    execution_result=self.execution_result)

            # Change current block status
            self.current_interaction_block.execution_mode = ExecutionMode.COMPLETED
            self.current_interaction_block.execution_result = self.execution_result
            self.current_interaction_block.interaction_end_time = time.time()

            # update previous block
            self.previous_interaction_block = self.current_interaction_block
            self.executed_blocks.append(self.current_interaction_block)

            return next_block, connecting_edge
        except Exception as e:
            self.logger.error("Error while getting the next block! {}".format(e))
            return next_block, connecting_edge

    def engagement(self, start=False):
        """
        @param start = bool
        """
        self.logger.info("Engagement called with start = {}".format(start))
        self.db_stream_controller.update_one(self.db_stream_controller.interaction_collection,
                                             data_key="startEngagement",
                                             data_dict={"startEngagement": start, "timestamp": time.time()})

    def verify_current_interaction_block(self):
        # if there are no more blocks, stop interacting
        if self.current_interaction_block is None:
            # stop interacting
            self.stop_playing()
            return False
        return True

    def execute_interaction_module(self):
        self.interaction_module = ModuleFactory.create_module(self.current_interaction_block.design_module,
                                                              self.current_interaction_block,
                                                              self.block_controller)
        self.logger.info("Interaction module: {}".format(self.interaction_module))
        if self.interaction_module is None:
            return

        next_b = self.interaction_module.execute_module()
        self.update_communication_style()

        if next_b is not None:
            next_b.is_hidden = True  # just in case!
            self.current_interaction_block.execution_mode = ExecutionMode.COMPLETED
            self.previous_interaction_block = self.current_interaction_block
            self.current_interaction_block = next_b

    def update_communication_style(self):
        try:
            if "person" in self.interaction_module.filename.lower():
                self.comm_style = CommunicationStyle.PERSON_ORIENTED
            elif "task" in self.interaction_module.filename.lower():
                self.comm_style = CommunicationStyle.TASK_ORIENTED
        except Exception as e:
            self.logger.error("Error while setting the communication style: {}".format(e))

    def execute_action_command(self):
        # check for remaining actions
        if self.current_interaction_block.has_action(action_type=ActionCommand.PLAY_MUSIC):
            self.on_music_mode()
            return True
        elif self.current_interaction_block.has_action(action_type=ActionCommand.WAIT):
            self.on_wait_mode()
            return True
        elif self.current_interaction_block.has_action(action_type=ActionCommand.GET_RESERVATIONS):
            self.on_get_reservations()
            return True

        return False

    def on_get_reservations(self):
        get_reservations_command = self.current_interaction_block.action_command
        if get_reservations_command is not None:
            reservations = get_reservations_command.execute()

    def on_wait_mode(self):
        wait_time = 1  # 1s
        try:
            if self.current_interaction_block is not None:
                self.current_interaction_block.execution_mode = ExecutionMode.COMPLETED
                wait_command = self.current_interaction_block.action_command
                if wait_command is not None:
                    wait_time = wait_command.wait_time
        except Exception as e:
            self.logger.error("Error while setting wait time! {}".format(e))
        finally:
            self.logger.debug("Waiting for {} s".format(wait_time))
            QTimer.singleShot(wait_time * 1000, self.execute_next_block)

    def on_music_mode(self):
        if self.music_controller is None:
            self.logger.debug("Music player is not connected! Will skip playing music.")
            self.on_music_stop()
        else:
            self.current_interaction_block.action_command.music_controller = self.music_controller
            success = self.current_interaction_block.action_command.execute()
            if success is True:
                self.logger.debug("Playing now: {}".format(self.current_interaction_block.action_command.track))
                # TODO: specify wait time as track time when play_time is < 0
                # use action play time
                wait_time = self.current_interaction_block.action_command.play_time
                if wait_time <= 0:
                    wait_time = 30  # wait for 30s then continue
                anim_key = self.current_interaction_block.action_command.animations_key
                if anim_key is None or anim_key == "":
                    QTimer.singleShot(int(wait_time) * 1000, self.on_music_stop)
                else:
                    self.on_animation_mode(music_command=self.current_interaction_block.action_command,
                                           animation_time=int(wait_time))
                # QTimer.singleShot(wait_time * 1000, self.on_music_stop)
            else:
                self.logger.warning("Unable to play music! {}".format(self.music_controller.warning_message))
                self.on_music_stop()

    def on_animation_mode(self, music_command, animation_time=0):
        self.music_command = music_command
        self.animations_lst = config_helper.get_animations()[music_command.animations_key]
        self.animation_time = animation_time
        self.animation_counter = -1

        self.timer_helper.start()
        self.execute_next_animation()

    def on_animation_completed(self, val=None):
        QTimer.singleShot(3000, self.execute_next_animation)

    def execute_next_animation(self):
        if self.music_command is None or len(self.animations_lst) == 0:
            QTimer.singleShot(1000, self.on_music_stop)
        elif self.timer_helper.elapsed_time() <= self.animation_time - 4:  # use 4s threshold
            # repeat the animations if the counter reached the end of the lst
            self.animation_counter += 1
            if self.animation_counter >= len(self.animations_lst):
                self.animation_counter = 0
            animation, message = self.get_next_animation(self.animation_counter)
            if message is None or message == "":
                self.animate(animation_name=animation)
            else:
                self.animated_say(message=message,
                                  animation_name=animation)
        else:
            remaining_time = self.animation_time - self.timer_helper.elapsed_time()
            QTimer.singleShot(1000 if remaining_time < 0 else remaining_time * 1000, self.on_music_stop)

    def get_next_animation(self, anim_index):
        anim, msg = ("", "")
        try:
            animation_dict = self.animations_lst[anim_index]
            if len(animation_dict) > 0:
                anim = animation_dict.keys()[0]
                msg = animation_dict[anim]
        except Exception as e:
            self.logger.error("Error while getting next animation! {}".format(e))
        finally:
            return anim, msg

    def on_music_stop(self):
        self.logger.debug("Finished playing music.")
        try:
            if self.current_interaction_block is not None:
                self.current_interaction_block.execution_mode = ExecutionMode.COMPLETED
            if self.music_controller is not None:
                self.music_controller.pause()
        except Exception as e:
            self.logger.error("Error while stopping the music! {}".format(e))
        finally:
            self.execute_next_block()

    # TABLET
    # ------
    def tablet_image(self, hide=False):
        self.db_stream_controller.update_one(self.db_stream_controller.interaction_collection,
                                             data_key="hideTabletImage",
                                             data_dict={"hideTabletImage": True, "timestamp": time.time()})

    # PROPERTIES
    # ==========

    @property
    def is_interacting(self):
        return self._is_interacting

    @is_interacting.setter
    def is_interacting(self, val=False):
        self._is_interacting = val
        self.db_stream_controller.update_one(self.db_stream_controller.interaction_collection,
                                             data_key="isInteracting",
                                             data_dict={"isInteracting": val, "timestamp": time.time()})
class SpeechHandler(object):
    def __init__(self, session):

        self.logger = logging.getLogger("Speech Handler")

        self.session = session

        self.tts = self.session.service("ALTextToSpeech")
        self.animated_speech = self.session.service("ALAnimatedSpeech")
        self.memory = self.session.service("ALMemory")
        self.speech_recognition = self.session.service("ALSpeechRecognition")
        self.audio = session.service("ALAudioDevice")

        self.keyword_observers = Observable()

        self.speech_certainty = 0.4
        self.voice_pitch = 100
        self.voice_speed = 85

        self.current_keywords = []
        self.is_listening = False
        self.start_time = time.time()

        # add a listener to the keyword stream
        self.keyword_listener = None
        self.keyword_events(subscribe=True)

    # SUBSCRIBE
    # =========
    def keyword_events(self, subscribe=True):
        try:
            if subscribe:
                self.keyword_listener = self.memory.subscriber(
                    "WordRecognized")
                self.keyword_listener.signal.connect(self.on_keyword)
            else:
                self.keyword_listener = None
        except Exception as e:
            self.logger.error(
                "Error while subscribing to recognized word event: {}".format(
                    e))

    # KEYWORDS
    # ========
    def on_keyword(self, value=None):
        self.logger.info("OnKeyword: value = {}".format(value))

        if (not self.is_listening) and (value is None or len(value) == 0):
            self.logger.info("No keywords!")
        else:
            try:
                certainty = value[1]

                if certainty >= self.speech_certainty:
                    keyword = value[0]

                    if keyword in self.current_keywords:
                        self.logger.info(
                            "Detected keyword is in the list: {}".format(
                                value))

                        self.is_listening = False
                        self.clear_keywords()
                        self.keyword_stream(start=False)

                        self.keyword_observers.notify_all(keyword)
                    else:
                        self.logger.info(
                            "Keyword received '{}' is not in the list {}".
                            format(keyword, self.current_keywords))
                else:
                    self.logger.info(
                        "OnKeyword received with low certainty: {}".format(
                            value))
            except Exception as e:
                self.logger.error(
                    "Error while getting the received answer! | {}".format(e))

    def add_keywords(self, keywords=None):
        # add keywords = [array of strings] to listen to
        if keywords:
            try:
                self.logger.info("Adding keywords: {}".format(keywords))
                self.speech_recognition.pause(True)
                self.speech_recognition.setVocabulary(keywords, False)
                self.speech_recognition.pause(False)
            except Exception as e:
                self.logger.error(
                    "Error while adding keywords: {} | {}".format(keywords, e))

    def remove_keywords(self, keywords=None):
        if keywords is None:
            keywords = []
        try:
            self.speech_recognition.pause(True)
            # self.speech_recognition.setVocabulary([k for k in self.current_keywords if k not in keywords], False)
        except Exception as e:
            self.logger.error("Error while removing keywords: {} | {}".format(
                keywords, e))

    def clear_keywords(self):
        self.current_keywords = []
        # self.remove_keywords()

    def keyword_stream(self, start=False):
        # start/close the speech recognition engine
        self.logger.info("Speech recognition engine {}.".format(
            "is starting" if start else "is stopped"))
        if start:
            self.speech_recognition.subscribe("SpeechHandler")
        else:
            self.speech_recognition.unsubscribe("SpeechHandler")

    # Listener
    # =========
    def on_speech_event(self,
                        event_name=None,
                        task_id=None,
                        subscriber_identifier=None):
        self.logger.info("Speech Event: {} | {} | {}".format(
            event_name, task_id, subscriber_identifier))
        self.on_start_listening()

    def on_start_listening(self, results=None):
        self.is_listening = True
        self.add_keywords(keywords=self.current_keywords)
        self.keyword_stream(start=True)

    # ======
    # SPEECH
    # ======
    def say(self, message="Hi"):
        text = "\\vct={}\\\\rspd={}\\{}".format(int(self.voice_pitch),
                                                int(self.voice_speed), message)
        self.tts.say(text)

    def animated_say(self, message="", animation_name=None):
        text = "\\vct={}\\\\rspd={}\\{}".format(int(self.voice_pitch),
                                                int(self.voice_speed), message)
        if animation_name is None:
            self.animated_speech.say(
                text, {"bodyLanguageMode": "contextual"})  # vs random
        else:
            self.animated_speech.say(
                '^start({}) {} ^wait({})'.format(animation_name, text,
                                                 animation_name),
                {"bodyLanguageMode": "contextual"})

    def set_volume(self, level=50.0):
        vol = int(level) if level > 1 else int(level * 100)
        self.logger.info("Setting volume to: {}".format(vol))
        self.audio.setOutputVolume(vol)

    def set_language(self, name="English"):
        self.tts.setLanguage(name)
        self.speech_recognition.setLanguage(name)

    # MEMORY
    # ======
    def insert(self, data_dict=None):
        try:
            for key in data_dict.keys():
                self.memory.insertData(key, data_dict[key])
        except Exception as e:
            print("Error while inserting '{}' into memory: {}".format(
                data_dict, e))

    def raise_event(self, event_name, event_value):
        self.logger.info("Raised event '{}' to load '{}'".format(
            event_name, event_value))
        self.memory.raiseEvent(event_name, event_value)

    def get_speech_event(self):
        return self.memory.subscriber("ALAnimatedSpeech/EndOfAnimatedSpeech")

    # PROPERTIES
    # ==========
    @property
    def speech_certainty(self):
        return self.__speech_certainty

    @speech_certainty.setter
    def speech_certainty(self, val):
        val = abs(float(val))
        self.__speech_certainty = val if (0 <= val <= 1) else (val / 100.0)

    # HELPER
    def print_data(self, result):
        self.logger.info('Result received: {}'.format(result))
class SpeechHandler(object):
    def __init__(self, session):

        self.logger = logging.getLogger("Speech Handler")

        self.session = session

        self.keyword_observers = Observable()

        self.speech_certainty = 0.4
        self.voice_pitch = 100
        self.voice_speed = 85

        self.current_keywords = []
        self.is_listening = False
        self.start_time = time.time()

        # add a listener to the keyword stream
        self.session.subscribe(self.on_keyword, "rom.optional.keyword.stream")

    # KEYWORDS
    # ========
    @inlineCallbacks
    def on_keyword(self, frame):
        if (not self.is_listening) and (frame is None or len(frame) == 0):
            self.logger.info("No frames!")
        else:
            try:
                certainty = frame["data"]["body"]["certainty"]

                if certainty >= self.speech_certainty:
                    keyword = frame["data"]["body"]["text"]

                    if keyword in self.current_keywords:
                        self.logger.info(
                            "Detected keyword is in the list: {}".format(
                                frame["data"]))

                        self.is_listening = False
                        yield self.clear_keywords()
                        yield self.keyword_stream(start=False)

                        self.keyword_observers.notify_all(keyword)
                    else:
                        self.logger.info(
                            "Keyword received '{}' is not in the list {}".
                            format(keyword, self.current_keywords))
                else:
                    self.logger.info(
                        "OnKeyword received with low certainty: {}".format(
                            frame))
            except Exception as e:
                self.logger.error(
                    "Error while getting the received answer! | {}".format(e))

    def add_keywords(self, keywords=None):
        # add keywords = [array of strings] to listen to
        self.session.call("rom.optional.keyword.add",
                          keywords=[] if keywords is None else keywords)

    def remove_keywords(self, keywords=None):
        self.session.call("rom.optional.keyword.remove",
                          keywords=[] if keywords is None else keywords)

    def clear_keywords(self):
        self.current_keywords = []
        self.session.call("rom.optional.keyword.clear")

    def keyword_stream(self, start=False):
        # start/close the keyword stream
        self.session.call("rom.optional.keyword.stream"
                          if start else "rom.optional.keyword.close")

    # Listener
    # =========

    def on_start_listening(self, results=None):
        self.is_listening = True
        self.add_keywords(keywords=self.current_keywords)
        self.keyword_stream(start=True)

    # ======
    # SPEECH
    # ======
    def say(self, message="Hi"):
        text = "\\vct={}\\\\rspd={}\\{}".format(int(self.voice_pitch),
                                                int(self.voice_speed), message)
        return self.session.call("rom.optional.tts.say", text=text)

    def animated_say(self, message="", animation_name=None):
        text = "\\vct={}\\\\rspd={}\\{}".format(int(self.voice_pitch),
                                                int(self.voice_speed), message)
        return self.session.call("rom.optional.tts.animate", text=text)

    def set_volume(self, level=50.0):
        vol = int(level) if level > 1 else int(level * 100)
        self.logger.info("Setting volume to: {}".format(vol))
        self.session.call("rom.actuator.audio.volume", volume=vol)

    def set_language(self, name="en"):
        self.session.call("rom.optional.tts.language", lang=u"{}".format(name))
        self.session.call("rie.dialogue.config.language",
                          lang=u"{}".format(name))

    # MEMORY
    # =======
    def insert(self, data_dict=None):
        try:
            self.session.call("rom.optional.tts.insert_data",
                              data_dict={} if data_dict is None else data_dict)
        except Exception as e:
            self.logger.error(
                "Error while inserting '{}' into memory: {}".format(
                    data_dict, e))

    # PROPERTIES
    # ==========
    @property
    def speech_certainty(self):
        return self.__speech_certainty

    @speech_certainty.setter
    def speech_certainty(self, val):
        val = abs(float(val))
        self.__speech_certainty = val if (0 <= val <= 1) else (val / 100.0)

    # HELPER
    # ======
    @inlineCallbacks
    def print_data(self, result):
        yield self.logger.info('Result received: {}'.format(result))
class TabletHandler(object):
    def __init__(self, session):

        self.logger = logging.getLogger("TabletHandler")
        self.session = session

        self.tablet_service = self.session.service("ALTabletService")
        self.memory = self.session.service("ALMemory")

        # TODO: add a listener to the tablet input stream
        self.tablet_input_listener = self.memory.subscriber("TabletInput")
        self.tablet_input_listener.signal.connect(self.on_tablet_input)

        self.tablet_input_observers = Observable()
        self.is_listening = False

    def show_webview(self, url="https://www.google.com", hide=False):
        try:
            if hide is True:
                self.tablet_service.hideWebview()
            else:
                # Enable tablet wifi and display the webpage
                self.tablet_service.enableWifi()
                self.tablet_service.showWebview(url)
        except Exception as e:
            self.logger.error(e)

    def on_tablet_input(self, value=None):
        self.logger.info("Tablet Input: {}".format(value))
        if not self.is_listening:
            self.logger.info("Not listening!")
        elif not value:
            self.logger.info("No input received!")
        else:
            try:
                self.logger.info("Received Tablet Input: {}".format(value))
                self.is_listening = False
                self.input_stream(start=False)

                tablet_input = value
                if type(tablet_input) is bytes:
                    tablet_input = tablet_input.decode('utf-8')

                url = TabletHandler.create_tablet_url(page_name="index")

                self.show_webview(url=url)
                self.tablet_input_observers.notify_all(tablet_input)
            except Exception as e:
                self.logger.error(
                    "Error while getting the received tablet input: {}".format(
                        e))

    def input_stream(self, start=False):
        self.logger.info("{} Tablet Input stream.".format(
            "Starting" if start else "Closing"))
        self.is_listening = start
        # TODO: start/close the input stream

    @staticmethod
    def create_tablet_url(page_name="index", url_params=None):
        tablet_settings = config_helper.get_tablet_settings()
        url = "http://{}/{}{}".format(
            tablet_settings["ip"],
            tablet_settings["pages"]["{}".format(page_name)],
            "" if url_params is None else url_params)
        return url

    def set_image(self, image_path="img/help_charger.png", hide=False):
        # If hide is false, display a local image located in img folder in the root of the robot
        tablet_settings = config_helper.get_tablet_settings()
        full_path = "http://{}/{}".format(tablet_settings["ip"], image_path)
        self.logger.info("Image path: {}".format(full_path))

        try:
            self.tablet_service.hideImage(
            ) if hide is True else self.tablet_service.showImageNoCache(
                full_path)
        except Exception as e:
            self.logger.error("Error while setting tablet image: {}".format(e))

    def configure_wifi(self, security="WPA2", ssid="", key=""):
        try:
            self.tablet_service.configureWifi(security, ssid, key)
            self.logger.debug("Successfully configured the wifi.")
        except Exception as e:
            self.logger.error("Error while configuring the wifi! {}".format(e))
 def __init__(self):
     self.logger = logging.getLogger("Connection Handler")
     self.rie = None
     self.session_observers = Observable()
     self.session = None
class ESGraphicsViewController(QGraphicsView):
    def __init__(self, graphics_scene, parent=None):
        super(ESGraphicsViewController, self).__init__(parent)

        self.logger = logging.getLogger("GraphicsView")

        self.graphics_scene = graphics_scene

        self._init_ui()
        self.setScene(self.graphics_scene)

        self.mode = Mode.NO_OP  # no operation

        self.zoom_in_factor = 1.1
        self.zoom_clamp = True
        self.zoom = 0
        self.zoom_step = 1
        self.zoom_range = [-20, 1]

        self.drag_edge = None
        self.drag_start_socket = None

        # to deal with event observers
        self.drag_enter_observers = Observable()
        self.drop_observers = Observable()
        self.block_selected_observers = Observable()
        self.no_block_selected_observers = Observable()
        self.invalid_edge_observers = Observable()

        self.update()
        self.show()

    def _init_ui(self):
        self.setRenderHints(QPainter.Antialiasing
                            | QPainter.HighQualityAntialiasing
                            | QPainter.TextAntialiasing
                            | QPainter.SmoothPixmapTransform)

        self.setViewportUpdateMode(QGraphicsView.FullViewportUpdate)

        # self.setHorizontalScrollBarPolicy(Qt.ScrollBarAsNeeded)
        self.setTransformationAnchor(QGraphicsView.AnchorUnderMouse)
        self.setDragMode(QGraphicsView.RubberBandDrag)

        # enable drop
        self.setAcceptDrops(True)

    def keyPressEvent(self, event):
        if event.key() in (Qt.Key_Delete, Qt.Key_Backspace):
            self.delete_selected()
        # elif event.key() == Qt.Key_S and event.modifiers() & Qt.ControlModifier:
        #     self.graphics_scene.scene.save_scene("graph.json")
        # elif event.key() == Qt.Key_L and event.modifiers() & Qt.ControlModifier:
        #     self.graphics_scene.scene.load_scene("graph.json")
        # elif event.key() == Qt.Key_Z \
        #        and event.modifiers() & Qt.ControlModifier \
        #        and not event.modifiers() & Qt.ShiftModifier:
        #    self.graphics_scene.scene.history.undo()
        # elif event.key() == Qt.Key_Z \
        #        and event.modifiers() & Qt.ControlModifier \
        #        and event.modifiers() & Qt.ShiftModifier:
        #    self.graphics_scene.scene.history.redo()
        elif event.key() == Qt.Key_H:
            to_log = "\nHISTORY:\ttotal = {} -- step = {}\n".format(
                len(self.graphics_scene.scene.history.history_stack),
                self.graphics_scene.scene.history.current_step)
            index = 0
            for item in self.graphics_scene.scene.history.history_stack:
                to_log = "{}\t#{} -- {}\n".format(to_log, index,
                                                  item['description'])
                index += 1
            self.logger.debug(to_log)

        super(ESGraphicsViewController, self).keyPressEvent(event)

    def dragEnterEvent(self, event):
        self.drag_enter_observers.notify_all(event)

    def dropEvent(self, event):
        self.drop_observers.notify_all(event)

    def mouseMoveEvent(self, event):
        if self.mode == Mode.DRAG_EDGE:
            pos = self.mapToScene(event.pos())
            self.drag_edge.update_destination(pos.x(), pos.y())

        super(ESGraphicsViewController, self).mouseMoveEvent(event)

    def mousePressEvent(self, event):
        if event.button() == Qt.LeftButton:
            self.left_mouse_button_press(event)
        elif event.button() == Qt.RightButton:
            self.right_mouse_button_press(event)
        elif event.button() == Qt.MiddleButton:
            self.middle_mouse_button_press(event)
        else:
            super(ESGraphicsViewController, self).mousePressEvent(event)

    def mouseReleaseEvent(self, event):
        if event.button() == Qt.LeftButton:
            self.left_mouse_button_release(event)
        elif event.button() == Qt.RightButton:
            self.right_mouse_button_release(event)
        elif event.button() == Qt.MiddleButton:
            self.middle_mouse_button_release(event)
        else:
            super(ESGraphicsViewController, self).mouseReleaseEvent(event)

    def left_mouse_button_press(self, event):
        item = self.get_clicked_item(event)
        # self.logger.debug("Item {} is clicked.".format(item))

        if hasattr(item, "block"):
            self.logger.debug("Selected item block: {}".format(item.block))
            # send the item not the event
            self.block_selected_observers.notify_all(item.block)
        else:
            self.no_block_selected_observers.notify_all(event)

        # if item is None:  # drag the scene
        #    pass  # self.setDragMode(QGraphicsView.ScrollHandDrag)
        if type(item) is ESGraphicsSocket:
            if self.mode == Mode.NO_OP:
                self.edge_drag_start(item)
                return

        if self.mode == Mode.DRAG_EDGE:
            success = self.edge_drag_end(item)
            if success:
                return

        super(ESGraphicsViewController, self).mousePressEvent(event)

    def left_mouse_button_release(self, event):
        item = self.get_clicked_item(event)

        # if item is None:
        #    pass  # self.setDragMode(QGraphicsView.NoDrag)

        if self.mode == Mode.DRAG_EDGE:
            # bypass the first click-release on the same socket
            if type(item) is ESGraphicsSocket:
                if item.socket != self.drag_start_socket:
                    success = self.edge_drag_end(item)
                    if success:
                        return

        # if item is not None and self.dragMode() == QGraphicsView.RubberBandDrag and self.mode is Mode.NO_OP:
        #    print("selection changed")
        # self.graphics_scene.scene.history.store("Selection changed")

        super(ESGraphicsViewController, self).mouseReleaseEvent(event)

    def right_mouse_button_press(self, event):
        super(ESGraphicsViewController, self).mousePressEvent(event)

        item = self.get_clicked_item(event)

        if item is None:
            # displays the number of blocks and edges in the scene
            to_log = "\nSCENE:\n\tBlocks:"
            for block in self.graphics_scene.scene.blocks:
                to_log = "{}\n\t\t{}".format(to_log, block)
            to_log = "{}\n\tEdges:".format(to_log)
            for edge in self.graphics_scene.scene.edges:
                to_log = "{}\n\t\t{}".format(to_log, edge)
            self.logger.info(to_log)
        elif isinstance(item, ESGraphicsSocket):
            self.logger.info("{} has edges: {}".format(item.socket,
                                                       item.socket.edges))
        elif isinstance(item, ESGraphicsEdge):
            self.logger.debug("{} connecting {} & {}".format(
                item.edge, item.edge.start_socket.block.title,
                item.edge.end_socket.block.title))
            self.logger.debug("Edge is in {}: {} | in {}: {}".format(
                item.edge.start_socket, item.edge
                in item.edge.start_socket.edges, item.edge.end_socket,
                item.edge in item.edge.end_socket.edges))

    def right_mouse_button_release(self, event):
        super(ESGraphicsViewController, self).mouseReleaseEvent(event)

    def middle_mouse_button_press(self, event):
        super(ESGraphicsViewController, self).mousePressEvent(event)

    def middle_mouse_button_release(self, event):
        super(ESGraphicsViewController, self).mouseReleaseEvent(event)

    def wheelEvent(self, event):
        modifiers = QApplication.keyboardModifiers()
        if modifiers == Qt.ControlModifier:
            self.zoom_scene(delta_y=event.angleDelta().y())
        else:
            super(ESGraphicsViewController, self).wheelEvent(event)

    def zoom_scene(self, delta_y):
        # zoom factor
        zoom_out_factor = 1 / self.zoom_in_factor

        # compute zoom
        if delta_y > 0:
            zoom_factor = self.zoom_in_factor
            self.zoom += self.zoom_step
        else:
            zoom_factor = zoom_out_factor
            self.zoom -= self.zoom_step

        clamped = False
        if self.zoom < self.zoom_range[0]:
            self.zoom, clamped = self.zoom_range[0], True
        if self.zoom > self.zoom_range[1]:
            self.zoom, clamped = self.zoom_range[1], True

        # scene scale
        if not clamped or self.zoom_clamp is False:
            self.scale(zoom_factor, zoom_factor)

    ###
    # Helper Methods
    ###
    def delete_selected(self):
        self.delete_selected_edges()
        self.delete_selected_blocks()

        self.graphics_scene.scene.store("Deleted selected items")

    def delete_selected_blocks(self):
        for item in self.graphics_scene.selectedItems():
            if hasattr(item, "block"):
                item.block.remove()

    def delete_selected_edges(self):
        for item in self.graphics_scene.selectedItems():
            if isinstance(item, ESGraphicsEdge):
                item.edge.remove()

    def get_clicked_item(self, event):
        pos = event.pos()
        return self.itemAt(pos)

    def edge_drag_start(self, item):
        self.mode = Mode.DRAG_EDGE

        self.drag_start_socket = item.socket

        # create a new edge with dotted line
        self.drag_edge = Edge(scene=self.graphics_scene.scene,
                              start_socket=item.socket,
                              end_socket=None,
                              edge_type=EdgeType.BEZIER)

    def edge_drag_end(self, item):
        # update mode
        self.mode = Mode.NO_OP

        success = False
        try:
            # remove dragged edge
            self.drag_edge.remove()
            self.drag_edge = None

            if type(item) is ESGraphicsSocket:
                # check if the connection is valid
                if self.is_valid_connection(item.socket):
                    # create edge
                    Edge(scene=self.graphics_scene.scene,
                         start_socket=self.drag_start_socket,
                         end_socket=item.socket,
                         edge_type=EdgeType.BEZIER)

                    # store
                    self.graphics_scene.scene.store("New edge created")
                    success = True
        except Exception as e:
            self.logger.error("Error while ending drag! {}".format(e))
            self.invalid_edge_observers.notify_all(
                "Error while creating the edge!")
        finally:
            return success

    def is_valid_connection(self, other_socket):
        # check if it's the same socket
        if other_socket == self.drag_start_socket:
            return False

        # connected sockets should have opposite types (input vs output)
        if other_socket.socket_type == self.drag_start_socket.socket_type:
            self.invalid_edge_observers.notify_all(
                "* Cannot connect two sockets of the same type ({})".format(
                    self.drag_start_socket.socket_type.name))
            return False

        # check if one of the sockets is connected to the other's block
        if self.drag_start_socket.is_connected_to_block(other_socket.block) \
                or other_socket.is_connected_to_block(self.drag_start_socket.block):
            return False

        # check the number of allowed edges for the each block
        if not (self.drag_start_socket.can_have_more_edges()
                and other_socket.can_have_more_edges()):
            self.invalid_edge_observers.notify_all(
                "* The Edge cannot be created: "
                "The output has reached the max number of allowed edges!")
            return False

        # connect to a block once
        # if other_socket.block.is_connected_to(self.drag_start_socket.block):
        #    return False

        # the connection is valid
        return True
class Block(Serializable, Observable):
    def __init__(self,
                 scene,
                 title="Start",
                 socket_types=[],
                 pos=[],
                 parent=None,
                 icon=None,
                 output_edges=1,
                 bg_color=None):
        super(Block, self).__init__()
        Observable.__init__(self)  # explicit call to second parent class

        self.logger = logging.getLogger("Block")

        self.scene = scene
        self.parent = parent  # any container
        self.graphics_block = None
        self.bg_color = bg_color

        self.icon = icon
        self.title = title  # is also the pattern name

        self.inputs = []
        self.outputs = []

        self.socket_spacing = 22

        self._init_ui(socket_types, pos, output_edges)

        # add observers
        self.editing_observers = Observable()
        self.settings_observers = Observable()

        # add editing/settings listeners
        self.content.editing_icon.clicked.connect(
            lambda: self.editing_observers.notify_all(event=self))
        self.content.settings_icon.clicked.connect(
            lambda: self.settings_observers.notify_all(event=self))

        # add block to the scene
        self.scene.add_block(self)

    def _init_ui(self, socket_types, pos, output_edges):
        self.content = ESBlockContentWidget(block=self)
        self.graphics_block = ESGraphicsBlock(block=self,
                                              bg_color=self.bg_color)

        self._init_sockets(socket_types, output_edges)

        if pos is not None and len(pos) == 2:
            self.set_pos(*pos)

    def _init_sockets(self, socket_types, output_edges):
        in_counter = 0
        out_counter = 0
        for st in socket_types:
            if st is SocketType.INPUT:
                self.inputs.append(
                    Socket(block=self,
                           index=in_counter,
                           position=Position.BOTTOM_LEFT,
                           socket_type=SocketType.INPUT))
                in_counter += 1
            else:
                self.outputs.append(
                    Socket(block=self,
                           index=out_counter,
                           position=Position.TOP_RIGHT,
                           socket_type=SocketType.OUTPUT,
                           edge_limit=output_edges))
                out_counter += 1

    def get_socket_position(self, index, position):
        # set x
        x, y = 0, 0  # for the left side
        try:
            if position in (Position.TOP_RIGHT, Position.BOTTOM_RIGHT,
                            Position.CENTER_RIGHT):
                x = self.graphics_block.width

            # set y
            if position in (Position.CENTER_LEFT, Position.CENTER_RIGHT):
                y = (self.graphics_block.height /
                     2) - index * self.socket_spacing
            elif position in (Position.BOTTOM_LEFT, Position.BOTTOM_RIGHT):
                # start on bottom
                y = self.graphics_block.height - (
                    2 * self.graphics_block.rounded_edge_size
                ) - index * self.socket_spacing
            else:
                y = self.graphics_block.title_height + self.graphics_block.rounded_edge_size + index * self.socket_spacing
        except Exception as e:
            self.logger.debug(
                "Error while getting the socket position! {}".format(e))
        finally:
            return [x, y]

    def update_connected_edges(self):
        for socket in self.inputs + self.outputs:
            socket.update_edge_positions()

    def is_connected_to(self, other_block):
        """
        :param other_block:
        :return: True if two blocks are connected; False otherwise.
        """
        for edge in self.scene.edges:
            if self in (edge.start_socket.block, edge.end_socket.block) and \
                    other_block in (edge.start_socket.block, edge.end_socket.block):
                self.logger.info("{} is connected to {}".format(
                    self, other_block))
                return True

        return False

    def get_edges(self, socket_type=SocketType.OUTPUT):
        edges = []
        for s in (self.outputs
                  if socket_type is SocketType.OUTPUT else self.inputs):
            edges.extend([e for e in s.edges])
        return edges

    def get_connected_blocks(self, socket_type=SocketType.OUTPUT):
        blocks = []
        # go through target sockets and get the connected blocks
        for output_socket in (self.outputs if socket_type is SocketType.OUTPUT
                              else self.inputs):
            connected_sockets = output_socket.get_connected_sockets()
            if connected_sockets is not None:
                blocks.extend([s.block for s in connected_sockets])

        self.logger.debug("# of Connected blocks: {}".format(
            0 if blocks is None else len(blocks)))
        return blocks

    def remove(self):
        # remove socket edges
        for socket in (self.inputs + self.outputs):
            # remove edges, if any
            socket.disconnect_all_edges()

        # remove block from scene
        self.scene.remove_block(self)
        self.graphics_block = None

    def __str__(self):
        return "<Block id {}..{}>".format((hex(id(self))[2:5]),
                                          (hex(id(self))[-3:]))

    def get_pos(self):
        return self.graphics_block.pos()  # QPointF

    def set_pos(self, x, y):
        self.graphics_block.setPos(x, y)

    @property
    def title(self):
        return self.__title

    @title.setter
    def title(self, value):
        self.__title = value
        if self.graphics_block is not None:
            self.graphics_block.title = self.title

    @property
    def icon(self):
        return self.__icon

    @icon.setter
    def icon(self, value):
        self.__icon = value
        if self.graphics_block is not None:
            self.graphics_block.set_title_pixmap(self.icon)

    @property
    def description(self):
        return self.content.description

    @description.setter
    def description(self, desc):
        self.content.description = desc

    def set_selected(self, val):
        if val is not None and self.graphics_block is not None:
            self.graphics_block.setSelected(val)

    @property
    def pattern(self):
        return self.parent.pattern if self.parent is not None else self.title

    ###
    # SERIALIZATION
    ###
    def serialize(self):
        return OrderedDict([
            ("id", self.id), ("title", self.title), ("icon", self.icon),
            ("pos_x", self.graphics_block.scenePos().x()),
            ("pos_y", self.graphics_block.scenePos().y()),
            ("inputs", [s.serialize() for s in self.inputs]),
            ("outputs", [s.serialize() for s in self.outputs]),
            ("content", self.content.serialize()),
            ("parent", {} if self.parent is None else self.parent.serialize()),
            ("bg_color", self.bg_color)
        ])

    def deserialize(self, data, hashmap={}):
        self.id = data["id"]
        hashmap[data["id"]] = self

        self.icon = data["icon"]
        self.title = data["title"]
        self.set_pos(data["pos_x"], data["pos_y"])
        self.bg_color = data["bg_color"] if "bg_color" in data.keys() else None

        # set inputs and outputs
        data["inputs"].sort(
            key=lambda s: s["index"] + Position[s["position"]].value * 1000)
        data["outputs"].sort(
            key=lambda s: s["index"] + Position[s["position"]].value * 1000)

        self.inputs = []
        for s_data in data["inputs"]:
            socket = Socket(block=self,
                            index=s_data["index"],
                            position=Position[s_data["position"]],
                            socket_type=SocketType[s_data["socket_type"]],
                            edge_limit=s_data["edge_limit"]
                            if "edge_limit" in s_data.keys() else 1)
            socket.deserialize(s_data, hashmap)
            self.inputs.append(socket)

        self.outputs = []
        for s_data in data["outputs"]:
            socket = Socket(block=self,
                            index=s_data["index"],
                            position=Position[s_data["position"]],
                            socket_type=SocketType[s_data["socket_type"]],
                            edge_limit=s_data["edge_limit"]
                            if "edge_limit" in s_data.keys() else 1)
            socket.deserialize(s_data, hashmap)
            self.outputs.append(socket)

        self.content.deserialize(data["content"], hashmap)

        # set parent
        if "parent" in data.keys() and len(data["parent"]) > 0:
            self.parent = block_helper.create_block_parent(
                data["parent"], hashmap)

        return True
class SimulationController(object):
    def __init__(self, block_controller, music_controller=None, parent=None):

        self.logger = logging.getLogger("SimulationController")
        self.block_controller = block_controller
        self.music_controller = music_controller
        self.user_input = None
        self.interaction_log = None
        self.simulation_dock_widget = None
        self._init_dock_widget(parent)
        self.user_turn = False
        self.timer_helper = TimerHelper()
        self.animations_lst = []

        self.current_interaction_block = None
        self.previous_interaction_block = None
        self.connecting_edge = None
        self.execution_result = None
        self.stop_playing = False
        self.finished_simulation_observable = Observable()

    def _init_dock_widget(self, parent):
        self.simulation_dock_widget = QtWidgets.QDockWidget(
            "Simulation", parent)
        size_policy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred,
                                            QtWidgets.QSizePolicy.Fixed)
        size_policy.setHorizontalStretch(0)
        size_policy.setVerticalStretch(0)
        size_policy.setHeightForWidth(
            self.simulation_dock_widget.sizePolicy().hasHeightForWidth())
        self.simulation_dock_widget.setSizePolicy(size_policy)
        self.simulation_dock_widget.setMinimumSize(QtCore.QSize(98, 150))
        self.simulation_dock_widget.setFloating(False)
        self.simulation_dock_widget.setFeatures(
            QtWidgets.QDockWidget.AllDockWidgetFeatures)
        self.simulation_dock_widget.setAllowedAreas(
            QtCore.Qt.AllDockWidgetAreas)
        self.simulation_dock_widget.setObjectName("simulationDockWidget")
        # layout
        widget_content = QtWidgets.QWidget()
        widget_content.setObjectName("simulationDockWidgetContents")
        grid_layout = QtWidgets.QGridLayout(widget_content)
        grid_layout.setContentsMargins(11, 11, 11, 11)
        grid_layout.setSpacing(6)
        grid_layout.setObjectName("simulationGridLayout")
        # display text edit
        self.interaction_log = QtWidgets.QTextEdit(widget_content)
        self.interaction_log.setAcceptDrops(False)
        self.interaction_log.setAutoFillBackground(True)
        self.interaction_log.setStyleSheet("background: white")
        self.interaction_log.setUndoRedoEnabled(False)
        self.interaction_log.setReadOnly(True)
        self.interaction_log.setAcceptRichText(True)
        self.interaction_log.setObjectName("simulationTextEdit")
        grid_layout.addWidget(self.interaction_log, 0, 0, 1, 1)
        # user input
        self.user_input = QtWidgets.QLineEdit(widget_content)
        self.user_input.setPlaceholderText("User Input")
        self.user_input.returnPressed.connect(self.check_user_input)
        self.user_input.setObjectName("simulationLineEdit")
        grid_layout.addWidget(self.user_input, 1, 0, 1, 1)

        widget_content.setLayout(grid_layout)
        self.simulation_dock_widget.setWidget(widget_content)

    def reset(self):
        self.block_controller.clear_selection()
        self.interaction_log.clear()
        self.user_turn = False
        self.current_interaction_block = None
        self.previous_interaction_block = None
        self.connecting_edge = None
        self.execution_result = None
        self.stop_playing = False

    def start_simulation(self, int_block):
        if int_block is None:
            return

        self.reset()
        self.simulation_dock_widget.setFocus()
        self.simulation_dock_widget.raise_()
        self.current_interaction_block = int_block
        self.execute_next_interaction_block()

    def execute_next_interaction_block(self):
        self.logger.debug("Getting the next interaction block...")

        if self.current_interaction_block is None \
                or self.user_turn is True:
            return

        self.logger.debug("Execution Result: {}".format(self.execution_result))

        if self.previous_interaction_block is None:  # simulation just started
            # update previous block only
            self.previous_interaction_block = self.current_interaction_block
        else:  # update previous and next blocks
            self.previous_interaction_block = self.current_interaction_block
            self.current_interaction_block, self.connecting_edge = \
                self.current_interaction_block.get_next_interaction_block(execution_result=self.execution_result)
            # reset execution_result
            self.execution_result = None

        self.simulate_interaction()

    def simulate_interaction(self):
        self.block_controller.clear_selection()

        # if there are no more blocks, stop interacting
        if self.current_interaction_block is None or self.stop_playing is True:
            self.update_interaction_log(
                robot_message="Finished the interaction!")
            self.finished_simulation_observable.notify_all(True)
            return True
        else:
            # execute the block
            self.logger.debug("Executing: {}".format(
                self.current_interaction_block.name))
            self.current_interaction_block.set_selected(True)
            if self.connecting_edge is not None:
                self.connecting_edge.set_selected(True)

            self.update_interaction_log(
                robot_message=self.current_interaction_block.message)
            if "question" in self.current_interaction_block.pattern.lower():
                self.user_turn = True
                return True
            # check actions
            if self.current_interaction_block.has_action(
                    action_type=ActionCommand.PLAY_MUSIC):
                self.on_music_mode()
            elif self.current_interaction_block.has_action(
                    action_type=ActionCommand.WAIT):
                self.on_wait_mode()
            else:
                QTimer.singleShot(1500, self.execute_next_interaction_block)

    def check_user_input(self):
        user_input = self.user_input.text()
        self.update_interaction_log(user_message=user_input)
        # clear input
        self.user_input.clear()

        try:
            # validate user input
            if user_input.lower() == "exit":
                # exit the interaction
                self.user_turn = False
                self.execution_result = user_input
                self.update_interaction_log(robot_message="Ok, i'm exiting!")
                QTimer.singleShot(1000, self.execute_next_interaction_block)
            elif self.current_interaction_block.is_valid_user_input(
                    user_input=user_input) is True:
                self.user_turn = False
                self.execution_result = user_input
                self.execute_next_interaction_block()
            else:
                self.update_interaction_log(
                    robot_message=
                    "Sorry, I didn't get your answer. Please try again!")
        except Exception as e:
            self.logger.error("Error while verifying user input! {}".format(e))

    def on_wait_mode(self):
        wait_command = self.current_interaction_block.action_command
        if wait_command is None:
            QTimer.singleShot(1000, self.execute_next_interaction_block)
        else:
            QTimer.singleShot(wait_command.wait_time * 1000,
                              self.execute_next_interaction_block)

    def on_music_mode(self):
        music_command = self.current_interaction_block.action_command
        if self.music_controller is None or music_command is None:
            QTimer.singleShot(1000, self.execute_next_interaction_block)
        else:
            music_command.music_controller = self.music_controller
            success = music_command.execute()
            if success is True:
                message = "Playing now: {}".format(music_command.track)
                self.update_interaction_log(robot_message=message)
                # TODO: specify wait time as track time when play_time is < 0
                # use action play time
                wait_time = music_command.play_time
                if wait_time <= 0:
                    wait_time = 30  # wait for 30s then continue
                anim_key = music_command.animations_key
                if anim_key is None or anim_key == "":
                    QTimer.singleShot(wait_time * 1000, self.on_music_stop)
                else:
                    self.timer_helper.start()
                    self.animations_lst = config_helper.get_animations()[
                        music_command.animations_key]
                    self.on_animation_mode(music_command=music_command,
                                           animation_time=wait_time,
                                           counter=0)
            else:
                warning = "Unable to play music! {}".format(
                    self.music_controller.warning_message)
                self.update_interaction_log(robot_message=warning)
                QTimer.singleShot(2000, self.execute_next_interaction_block)

    def on_animation_mode(self, music_command, animation_time=0, counter=0):
        if music_command is None:
            QTimer.singleShot(1000, self.on_music_stop)

        if self.timer_helper.elapsed_time(
        ) <= animation_time - 4:  # 4s threshold
            anim_index = 0 if counter >= len(self.animations_lst) else counter
            anim, msg = self.get_next_animation(anim_index)

            robot_message = "{} - Executing {}".format(
                "Animation time" if msg is None else msg, anim)
            self.update_interaction_log(robot_message=robot_message)
            QTimer.singleShot(
                4000, lambda: self.on_animation_mode(
                    music_command, animation_time, anim_index + 1))
        else:
            remaining_time = animation_time - self.timer_helper.elapsed_time()
            QTimer.singleShot(
                1000 if remaining_time < 0 else remaining_time * 1000,
                self.on_music_stop)

    def get_next_animation(self, anim_index):
        anim, msg = ("", "")
        try:
            animation_dict = self.animations_lst[anim_index]
            if len(animation_dict) > 0:
                anim = animation_dict.keys()[0]
                msg = animation_dict[anim]
        except Exception as e:
            self.logger.error(
                "Error while getting next animation! {}".format(e))
        finally:
            return anim, msg

    def on_music_stop(self):
        self.update_interaction_log(robot_message="Let' continue!")
        self.music_controller.pause()
        self.execute_next_interaction_block()

    def update_interaction_log(self, robot_message=None, user_message=None):
        if robot_message is not None and robot_message != "":
            self._append_interaction_text(name="Robot",
                                          color_name="green",
                                          message=robot_message)
        elif self.user_turn is True:  # user_input is not None
            # to prevent logging users' entered input when it's not their turn
            self._append_interaction_text(name="User",
                                          color_name="maroon",
                                          message=user_message)

    def _append_interaction_text(self, name, color_name, message):
        self.interaction_log.setTextColor(QtGui.QColor(color_name))
        self.interaction_log.append("{}:".format(name))
        self.interaction_log.setTextColor(QtGui.QColor("black"))
        self.interaction_log.append("{}".format(message))

        self.logger.debug("{}: {}".format(name, message))
from es_common.model.interaction_block import InteractionBlock
from es_common.model.observable import Observable

block_observers = Observable()


def create_block_parent(parent_data, hashmap={}):
    interaction_block = InteractionBlock.create_interaction_block(parent_data)
    # deserialize
    interaction_block.deserialize(parent_data, hashmap)

    block_observers.notify_all(interaction_block.block)

    return interaction_block
class EngagementHandler(object):
    def __init__(self, session):
        self.logger = logging.getLogger("EngagementHandler")

        self.session = session

        self.memory = self.session.service("ALMemory")
        self.face_service = self.session.service("ALFaceDetection")
        self.tracker = self.session.service("ALTracker")

        self.tracker_face_size = 0.1
        self.last_time_detected = 0  # log the time
        self.notification_interval = 1  # seconds

        # observers
        self.face_detected_observers = Observable()
        self.face_subscriber = None

        # subscribe to face events
        self.face_events(subscribe=True)

    # SUBSCRIBE
    # =========
    def face_events(self, subscribe=True):
        if subscribe:
            self.face_subscriber = self.memory.subscriber("FaceDetected")
            self.face_subscriber.signal.connect(self.on_face_detected)
            self.face_service.subscribe("ESEngagementHandler")
        else:
            self.face_subscriber = None
            self.face_service.unsubscribe("ESEngagementHandler")

    def on_face_detected(self, value):
        # self.logger.info("Face detected: {}".format(value))
        try:
            if value is None or value == []:
                time.sleep(1)
            else:
                faces_info = value[1]

                # skip empty frames
                if faces_info and len(faces_info) > 0:
                    faces_info.pop()  # rec info
                    face_size = 0.0
                    for f_info in faces_info:
                        tmp_size = max(f_info[0][3], f_info[0][4])
                        face_size = max(face_size, tmp_size)

                    # > x seconds: notify observers
                    detection_interval = time.time() - self.last_time_detected
                    if detection_interval >= self.notification_interval:
                        self.logger.info(
                            "Detected a face: {} | after {}s".format(
                                face_size, detection_interval))
                        self.last_time_detected = time.time()
                        self.face_detected_observers.notify_all(face_size)
                else:
                    time.sleep(1)
        except Exception as e:
            self.logger.error(
                "Error while receiving the detected face: {}".format(e))

    def face_detection(self, start=False):
        # start/close the face stream
        if start:
            self.face_service.subscribe("ESEngagementHandler")
        else:
            self.face_service.unsubscribe("ESEngagementHandler")

    def face_tracker(self, start=False):
        target_name = "Face"
        if start is True:
            self.tracker.registerTarget(target_name, self.tracker_face_size)
            self.tracker.track(target_name)
        else:
            self.tracker.stopTracker()
            self.tracker.unregisterAllTargets()