#
# Gramps - a GTK+/GNOME based genealogy program
#
# Copyright (C) 2002-2006  Donald N. Allingham
# Copyright (C) 2011       Tim G L Lyons
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, see <https://www.gnu.org/licenses/>.
#

# -------------------------------------------------------------------------
#
# Standard Python modules
#
# -------------------------------------------------------------------------
from ...const import GRAMPS_LOCALE as glocale

_ = glocale.translation.gettext

# -------------------------------------------------------------------------
#
# Gramps modules
#
# -------------------------------------------------------------------------
from . import Rule

# -------------------------------------------------------------------------
#
# Typing modules
#
# -------------------------------------------------------------------------
from ...lib.citationbase import CitationBase
from ...db import Database


# -------------------------------------------------------------------------
#
# HasSourceOf
#
# -------------------------------------------------------------------------
class HasSourceOfBase(Rule):
    """Rule that checks for objects that have a particular source."""

    labels = [_("Source ID:")]
    name = "Object with the <source>"
    category = _("Citation/source filters")
    description = "Matches objects who have a particular source"

    def prepare(self, db: Database, user):
        self.nosource = self.list[0] == ""
        if self.nosource:
            self.source_handle = None
        else:
            source = db.get_source_from_gramps_id(self.list[0])
            self.source_handle = source.handle if source else None

    def apply_to_one(self, db: Database, object: CitationBase) -> bool:
        if not self.source_handle:
            if self.nosource:
                # check whether the citation list is empty as a proxy for
                # there being no sources
                return len(object.get_all_citation_lists()) == 0
            else:
                return False
        else:
            for citation_handle in object.get_all_citation_lists():
                citation = db.get_citation_from_handle(citation_handle)
                if citation.source_handle == self.source_handle:
                    return True
            return False
