[ADD] beginning of the pingen module

pingen/ir_attachment.py

@@ -0,0 +1,90 @@
+# -*- coding: utf-8 -*-
+##############################################################################
+#
+#    Author: Guewen Baconnier
+#    Copyright 2012 Camptocamp SA
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero General Public License as
+#    published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+##############################################################################
+
+from openerp.osv import osv, orm, fields
+from openerp.tools.translate import _
+
+
+class ir_attachment(orm.Model):
+
+    _inherit = 'ir.attachment'
+
+    _columns = {
+        'send_to_pingen': fields.boolean('Send to Pingen.com'),
+        'pingen_task_ids': fields.one2many(
+            'pingen.task', 'attachment_id',
+            string="Pingen Task", readonly=True),
+    }
+
+    def _prepare_pingen_task_vals(self, cr, uid, attachment, context=None):
+        return {'attachment_id': attachment.id,
+                'config': 'created from attachment'}
+
+    def _handle_pingen_task(self, cr, uid, attachment_id, context=None):
+        """ Reponsible of the related ``pingen.task`` when the ``send_to_pingen``
+        field is modified.
+
+        Only one pingen task can be created per attachment.
+
+        When ``send_to_pingen`` is activated:
+          * Create a ``pingen.task`` if it does not already exist
+          * Put the related ``pingen.task`` to ``pending`` if it already exist
+        When it is deactivated:
+          * Do nothing if no related ``pingen.task`` exists
+          * Or cancel it
+          * If it has already been pushed to pingen.com, raises
+            an `osv.except_osv` exception
+        """
+        pingen_task_obj = self.pool.get('pingen.task')
+        attachment = self.browse(cr, uid, attachment_id, context=context)
+        task = attachment.pingen_task_ids[0] if attachment.pingen_task_ids else None
+        if attachment.send_to_pingen:
+            if task:
+                task.write({'state': 'pending'}, context=context)
+            else:
+                pingen_task_obj.create(
+                        cr, uid,
+                        self._prepare_pingen_task_vals(
+                            cr, uid, attachment, context=context),
+                        context=context)
+        else:
+            if task:
+                if task.state == 'pushed':
+                    raise osv.except_osv(
+                        _('Error'),
+                        _('The attachment %s is already pushed to pingen.com.') % \
+                            attachment.name)
+                task.write({'state': 'canceled'}, context=context)
+        return
+
+    def create(self, cr, uid, vals, context=None):
+        attachment_id = super(ir_attachment, self).create(cr, uid, vals, context=context)
+        if 'send_to_pingen' in vals:
+            self._handle_pingen_task(cr, uid, attachment_id, context=context)
+        return attachment_id
+
+    def write(self, cr, uid, ids, vals, context=None):
+        res = super(ir_attachment, self).write(cr, uid, ids, vals, context=context)
+        if 'send_to_pingen' in vals:
+            for attachment_id in ids:
+                self._handle_pingen_task(cr, uid, attachment_id, context=context)
+        return res
+