def post(self, exploration_id, state_id):
"""Handles feedback interactions with readers."""
values = {}
exploration = Exploration.get(exploration_id)
old_state = exploration.get_state_by_id(state_id)
# The reader's answer.
answer = self.payload.get('answer')
# The answer handler (submit, click, etc.)
handler = self.payload.get('handler')
# The 0-based index of the last content block already on the page.
block_number = self.payload.get('block_number') + 1
params = self.payload.get('params', {})
params['answer'] = answer
rule = old_state.classify(handler, answer, params)
new_state_id = rule.dest
feedback = rule.get_feedback_string()
recorded_answer = answer
# TODO(sll): This is a special case for multiple-choice input
# which should really be handled generically.
if old_state.widget.widget_id == 'interactive-MultipleChoiceInput':
recorded_answer = old_state.widget.params['choices'][int(answer)]
if recorded_answer is not None:
recorded_answer = json.dumps(recorded_answer)
EventHandler.record_rule_hit(
exploration_id, state_id, rule, recorded_answer)
# Add this answer to the state's 'unresolved answers' list.
if recorded_answer not in old_state.unresolved_answers:
old_state.unresolved_answers[recorded_answer] = 0
old_state.unresolved_answers[recorded_answer] += 1
# TODO(sll): Make this async?
old_state.put()
html_output, widget_output = '', []
old_params = params
if new_state_id == feconf.END_DEST:
# This leads to a FINISHED state.
new_state = None
if feedback:
html_output, widget_output = self._append_feedback(
feedback, html_output, widget_output, block_number,
old_params)
EventHandler.record_exploration_completed(exploration_id)
else:
new_state = exploration.get_state_by_id(new_state_id)
EventHandler.record_state_hit(exploration_id, new_state_id)
if feedback:
html_output, widget_output = self._append_feedback(
feedback, html_output, widget_output, block_number,
old_params)
# Populate new parameters.
params = get_params(new_state, existing_params=old_params)
# Append text for the new state only if the new and old states
# differ.
if old_state.id != new_state.id:
state_html, state_widgets = parse_content_into_html(
new_state.content, block_number, params)
# Separate text for the new state and feedback for the old state
# by an additional line.
if state_html and feedback:
html_output += '<br>'
html_output += state_html
widget_output += state_widgets
# Render the response in the customized html if
# - the response is not rendered in the sticky interactive widget, and
# - there is a static rendering html provided for that widget.
sticky = (
new_state_id != feconf.END_DEST and
new_state.widget.sticky and
new_state.widget.widget_id == old_state.widget.widget_id
)
custom_response = ''
if not sticky:
response_params = utils.parse_dict_with_params(
old_state.widget.params, old_params)
response_params['answer'] = old_params['answer']
response_params['iframe_content'] = False
custom_response = InteractiveWidget.get_raw_static_code(
old_state.widget.widget_id, response_params)
if custom_response:
response_params['iframe_content'] = True
values['response_iframe'] = (
InteractiveWidget.get_raw_static_code(
old_state.widget.widget_id, response_params)
)
# Append reader's answer.
response = custom_response if custom_response else answer
if sticky:
response = ''
values['reader_html'] = self.jinja2_env.get_template(
'reader/reader_response.html').render({
'response': response,
'custom_response': bool(custom_response),
})
if new_state_id != feconf.END_DEST and new_state.widget.widget_id in DEFAULT_ANSWERS:
values['default_answer'] = DEFAULT_ANSWERS[new_state.widget.widget_id]
values['state_id'] = new_state_id
values.update({
'exploration_id': exploration_id,
'oppia_html': html_output, 'widgets': widget_output,
'block_number': block_number, 'params': params,
'finished': (new_state_id == feconf.END_DEST),
})
if new_state_id != feconf.END_DEST:
if sticky:
values['interactive_widget_html'] = ''
values['sticky_interactive_widget'] = True
else:
values['interactive_widget_html'] = (
InteractiveWidget.get_raw_code(
new_state.widget.widget_id,
params=utils.parse_dict_with_params(
new_state.widget.params, params)
)
)
else:
values['interactive_widget_html'] = ''
self.render_json(values)
