+
−"""hooks triggered on email entities creation:
+
−
+
−* look for state change instruction (XXX security)
+
−* set email content as a comment on an entity when comments are supported and
+
−  linking information are found
+
−
+
−:organization: Logilab
+
−:copyright: 2003-2009 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+
−:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
+
−"""
+
−__docformat__ = "restructuredtext en"
+
−
+
−import re
+
−
+
−from cubicweb import UnknownEid, typed_eid
+
−from cubicweb.view import Component
+
−
+
−        # XXX use user session if gpg signature validated
+
−
+
−class TextAnalyzer(Component):
+
−    """analyze and extract information from plain text by calling registered
+
−    text parsers
+
−    """
+
−    id = 'textanalyzer'
+
−
+
−    def parse(self, caller, text):
+
−        for parsercls in self.req.vreg['components'].get('textparser', ()):
+
−            parsercls(self.req).parse(caller, text)
+
−
+
−
+
−class TextParser(Component):
+
−    """base class for text parser, responsible to extract some information
+
−    from plain text. When something is done, it usually call the
+
−
+
−      .fire_event(something, {event args})
+
−
+
−    method on the caller.
+
−    """
+
−    id = 'textparser'
+
−    __abstract__ = True
+
−
+
−    def parse(self, caller, text):
+
−        raise NotImplementedError
+
−
+
−
+
−class ChangeStateTextParser(TextParser):
+
−    """search some text for change state instruction in the form
+
−
+
−         :<transition name>: #?<eid>
+
−    """
+
−    instr_rgx = re.compile(':(\w+):\s*#?(\d+)', re.U)
+
−
+
−    def parse(self, caller, text):
+
−        for trname, eid in self.instr_rgx.findall(text):
+
−            try:
+
−                entity = self.req.entity_from_eid(typed_eid(eid))
+
−            except UnknownEid:
+
−                self.error("can't get entity with eid %s", eid)
+
−                continue
+
−            if not hasattr(entity, 'in_state'):
+
−                self.error('bad change state instruction for eid %s', eid)
+
−                continue
+
−            tr = entity.current_workflow and entity.current_workflow.transition_by_name(trname)
+
−            if tr and tr.may_be_fired(entity.eid):
+
−                try:
+
−                    trinfo = entity.fire_transition(tr)
+
−                    caller.fire_event('state-changed', {'trinfo': trinfo,
+
−                                                        'entity': entity})
+
−                except:
+
−                    self.exception('while changing state of %s', entity)
+
−            else:
+
−                self.error("can't pass transition %s on entity %s",
+
−                           trname, entity)