"""entity/relation schemas to store email in an cubicweb instance

:organization: Logilab

:copyright: 2006-2013 LOGILAB S.A. (Paris, FRANCE), all rights reserved.

:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr

"""

from cubicweb import _

# pylint: disable-msg=E0611,F0401

from yams.buildobjs import (SubjectRelation, RelationType, EntityType,

                            String, Datetime, Int, RelationDefinition)

from yams.reader import context

from cubicweb.schema import ERQLExpression

class Email(EntityType):

    """electronic mail"""

    subject   = String(fulltextindexed=True)

    date      = Datetime(description=_('UTC time on which the mail was sent'))

    messageid = String(required=True, indexed=True)

    headers   = String(description=_('raw headers'))

    sender     = SubjectRelation('EmailAddress', cardinality='?*')

    # an email with only Bcc is acceptable, don't require any recipients

    recipients = SubjectRelation('EmailAddress')

    cc         = SubjectRelation('EmailAddress')

    parts       = SubjectRelation('EmailPart', cardinality='*1', composite='subject')

    attachment  = SubjectRelation('File')

    reply_to    = SubjectRelation('Email', cardinality='?*')

    cites       = SubjectRelation('Email')

    in_thread   = SubjectRelation('EmailThread', cardinality='?*')

class EmailPart(EntityType):

    """an email attachment"""

    __permissions__ = {

        'read':   ('managers', 'users', 'guests',), # XXX if E parts X, U has_read_permission E

        'add':    ('managers', ERQLExpression('E parts X, U has_update_permission E'),),

        'delete': ('managers', ERQLExpression('E parts X, U has_update_permission E')),

        'update': ('managers', 'owners',),

        }

    content  = String(fulltextindexed=True)

    content_format = String(required=True, maxsize=50)

    ordernum = Int(required=True)

    alternative = SubjectRelation('EmailPart', symmetric=True)

class EmailThread(EntityType):

    """discussion thread"""

    title = String(required=True, indexed=True, fulltextindexed=True)

    see_also = SubjectRelation('EmailThread')

    forked_from = SubjectRelation('EmailThread', cardinality='?*')

class parts(RelationType):

    """ """

    fulltext_container = 'subject'

class sender(RelationType):

    """ """

    inlined = True

class in_thread(RelationType):

    """ """

    inlined = True

class reply_to(RelationType):

    """ """

    inlined = True

class generated_by(RelationType):

    """mark an entity as generated from an email"""

    cardinality = '?*'

    subject = ('TrInfo',)

    object = 'Email'

# if comment is installed

if 'Comment' in context.defined:

    class comment_generated_by(RelationDefinition):

        subject = 'Comment'

        name = 'generated_by'

        object = 'Email'