def __init__(self, rdf_node):
global _node_json_number
subj_str = str(rdf_node)
entity_label, entity_graphic_class, entity_id = lib_naming.ParseEntityUri(
subj_str, long_display=False, force_entity_ip_addr=None)
self.m_label = entity_label.strip()
self.m_class = entity_graphic_class
array_graph_params = lib_patterns.TypeToGraphParams(self.m_class)
# "Graphic_shape","Graphic_colorfill","Graphic_colorbg","Graphic_border","Graphic_is_rounded"
self.m_color = array_graph_params[1]
# TODO: Display the doc in the module with FromModuleToDoc(importedMod,filDfltText):
self.m_info_list = [entity_graphic_class]
self.m_info_dict = dict()
self.m_index = _node_json_number
the_survol_url = lib_util.survol_unescape(rdf_node)
self.m_survol_url = the_survol_url
self.m_survol_universal_alias = lib_exports.NodeToUniversalAlias(
rdf_node)
_node_json_number += 1 # One more node.
def _custom_decode_hex(the_str):
the_str = lib_util.survol_unescape(the_str)
return the_str.replace("%25", "%").replace("%2F", "/").replace(
"%5C", "\\").replace("%3A", ":")
def output_rdf_graph_as_json_d3(page_title, error_msg, parameters, grph):
"""
Transforms a RDF graph into a JSON document.
This returns a graph made of Json objects which are suitable for visualisation in the Javascript
interface to Survol, which is based on D3.
"""
# Must be reset to zero between several executions, when run by WSGI.
global _node_json_number
_node_json_number = 0
# It contains a cache because the same nodes may appear several times.
def node_to_json_obj(the_nod):
try:
return node_to_json_obj.dictNod2Json[the_nod]
except KeyError:
json_obj = NodeJson(the_nod)
node_to_json_obj.dictNod2Json[the_nod] = json_obj
return json_obj
node_to_json_obj.dictNod2Json = dict()
links = []
for subj, pred, obj in grph:
# This applies only to entity.py : In rendering based on Json, scripts are not displayed as nodes,
# but in hierarchical menus. The node must not appear at all.
# TODO: Should probably also eliminate pc.property_rdf_data_nolist2 etc ... See lib_client.
if pred == pc.property_script:
logging.debug("continue subj=%s obj=%s", subj, obj)
continue
# Normal data scripts are not accepted. This should apply only to file_directory.py and file_to_mime.py
if not _script_for_json(subj):
continue
if not _script_for_json(obj):
continue
subj_obj = node_to_json_obj(subj)
subj_id = subj_obj.m_survol_url
prop_nam = lib_exports.PropToShortPropNam(pred)
# TODO: BUG: If several nodes for the same properties, only the last one is kept.
if lib_kbase.IsLink(obj):
obj_obj = node_to_json_obj(obj)
obj_id = obj_obj.m_survol_url
links.extend([{
'source': subj_id,
'target': obj_id,
'survol_link_prop': prop_nam
}])
# TODO: Add the name corresponding to the URL, in m_info_dict so that some elements
# of the tooltip would be clickable. On the other hand, one just need to merge
# the nodes relative to the object, by right-clicking.
elif lib_kbase.IsLiteral(obj):
if pred == pc.property_information:
try:
subj_obj.m_info_list.append(str(obj.value))
except UnicodeEncodeError:
# 'ascii' codec can't encode character u'\xf3' in position 17: ordinal not in range(128)
# https://stackoverflow.com/questions/9942594/unicodeencodeerror-ascii-codec-cant-encode-character-u-xa0-in-position-20
subj_obj.m_info_list.append(obj.value.encode('utf-8'))
else:
if isinstance(obj.value, six.integer_types) or isinstance(
obj.value, six.string_types):
subj_obj.m_info_dict[prop_nam] = obj.value
else:
# If the value cannot be serializable to JSON.
subj_obj.m_info_dict[prop_nam] = type(obj.value).__name__
else:
raise Exception(__file__ + " Cannot happen here")
# Now, this creates the nodes sent as json objects.
num_nodes = len(node_to_json_obj.dictNod2Json)
nodes = [None] * num_nodes
for nod in node_to_json_obj.dictNod2Json:
nod_obj = node_to_json_obj.dictNod2Json[nod]
nod_titl = nod_obj.m_label
nod_id = nod_obj.m_index
# The URL must not contain any HTML entities when in a XML or SVG document,
# and therefore must be escaped. Therefore they have to be unescaped when transmitted in JSON.
# This is especially needed for RabbitMQ because the parameter defining its connection name
# has the form: "Url=LOCALHOST:12345,Connection=127.0.0.1:51748 -> 127.0.0.1:5672"
# HTTP_MIME_URL
the_survol_nam = lib_util.survol_unescape(
nod_titl) # MUST UNESCAPE HTML ENTITIES !
# TODO: Use the same object for lookup and Json.
nodes[nod_id] = {
'id': nod_obj.m_survol_url, # Required by D3
'name': the_survol_nam,
# Theoretically, this URL should be HTML unescaped then CGI escaped.
'survol_url': nod_obj.m_survol_url, # Duplicate of 'id'
'survol_universal_alias': nod_obj.m_survol_universal_alias,
'survol_fill': nod_obj.m_color,
'entity_class': nod_obj.
m_class, # TODO: Maybe not needed because also in the URL ?
'survol_info_list': nod_obj.m_info_list,
'survol_info_dict': nod_obj.m_info_dict
}
# This is the graph displayed by D3.
graph = {"page_title": page_title, "nodes": nodes, "links": links}
_write_json_header(json.dumps(graph, indent=2))