[IMP] website_slides_survey: add survey course visibility

Previously there was no way to view when a survey (specifically a
certification survey) was being used by a course from the survey
app. We handle 2 cases for when a survey is currently assigned to
a course:

1. A survey is assigned to 1 course => survey form stat button visible to bring user
   directly to corresponding course form.
2. A survey is assigned to more than 1 course (unlikely, but currently possible) =>
   survey form stat button visible to show user a list of corresponding courses where
   each list entry can be clicked on to view corresponding course form.

Note: we do not cover viewing courses a survey was previously assigned to as this would
   be currently be unreasonable to track.

closes odoo/odoo#42336

Task: 2153743
Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>

2 files changed, 54 insertions, 2 deletions

diff --git a/addons/website_slides_survey/models/survey_survey.py b/addons/website_slides_survey/models/survey_survey.py
index 6cc5b857069..98dc3e6a776 100644
--- a/addons/website_slides_survey/models/survey_survey.py
+++ b/addons/website_slides_survey/models/survey_survey.py
@@ -1,12 +1,46 @@
 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
-from odoo import models
+from odoo import api, fields, models, _
 
 
 class Survey(models.Model):
     _inherit = 'survey.survey'
 
+    slide_ids = fields.One2many(
+        'slide.slide', 'survey_id', string="Certification Slides",
+        help="The slides this survey is linked to through the e-learning application")
+    slide_channel_ids = fields.One2many(
+        'slide.channel', string="Certification Courses", compute='_compute_slide_channel_data',
+        help="The courses this survey is linked to through the e-learning application",
+        groups='website_slides.group_website_slides_officer')
+    slide_channel_count = fields.Integer("Courses Count", compute='_compute_slide_channel_data', groups='website_slides.group_website_slides_officer')
+
+    @api.depends('slide_ids.channel_id')
+    def _compute_slide_channel_data(self):
+        for survey in self:
+            survey.slide_channel_ids = survey.slide_ids.mapped('channel_id')
+            survey.slide_channel_count = len(survey.slide_channel_ids)
+
+    # ---------------------------------------------------------
+    # Actions
+    # ---------------------------------------------------------
+
+    def action_survey_view_slide_channels(self):
+        action = self.env.ref('website_slides.slide_channel_action_overview').read()[0]
+        action['display_name'] = _("Courses")
+        if self.slide_channel_count == 1:
+            action.update({'views': [(False, 'form')],
+                           'res_id': self.slide_channel_ids[0].id})
+        else:
+            action.update({'views': [[False, 'tree'], [False, 'form']],
+                           'domain': [('id', 'in', self.slide_channel_ids.ids)]})
+        return action
+
+    # ---------------------------------------------------------
+    # Business
+    # ---------------------------------------------------------
+
     def _check_answer_creation(self, user, partner, email, test_entry=False, check_attempts=True, invite_token=False):
         """ Overridden to allow website_slides_officer to test certifications. """
         self.ensure_one()
diff --git a/addons/website_slides_survey/views/survey_survey_views.xml b/addons/website_slides_survey/views/survey_survey_views.xml
index 87eda55e778..5028c8c15a9 100644
--- a/addons/website_slides_survey/views/survey_survey_views.xml
+++ b/addons/website_slides_survey/views/survey_survey_views.xml
@@ -25,4 +25,22 @@
             </p>
         </field>
     </record>
-</odoo>
\ No newline at end of file
+
+    <record id="survey_survey_view_form" model="ir.ui.view">
+        <field name="name">survey.survey.view.form.inherit.website_slides</field>
+        <field name="model">survey.survey</field>
+        <field name="inherit_id" ref="survey.survey_form"/>
+        <field name="arch" type="xml">
+            <xpath expr="//button[@name='action_survey_user_input_certified']" position="before">
+                <button name="action_survey_view_slide_channels"
+                    type="object"
+                    class="oe_stat_button"
+                    attrs="{'invisible': [('slide_channel_count', '=', 0)]}"
+                    icon="fa-graduation-cap"
+                    groups="website_slides.group_website_slides_officer">
+                    <field string="Courses" name="slide_channel_count" widget="statinfo"/>
+                </button>
+            </xpath>
+        </field>
+    </record>
+</odoo>