[IMP] project, portal: group tasks by project on portal.

The portal view for tasks previously listed all task of all projects
without grouping them. It was a problem, mainly when we want to make
the distinction on project label_tasks, to make the difference
between tasks, issues, ... Grouping task by project by default allows
to show the label_tasks before each project.

Grouping the tasks removes the possibility to define a primary
ordering. We want to be able to ungroup the tasks in some cases.
The implentation was done in the portalsearch bar adding
a group by option. The portal proposes two grouping options,
project (by default) and none (to keep strict ordering).

Task: #1827950
PR #23769

3 files changed, 63 insertions, 27 deletions

diff --git a/addons/portal/views/portal_templates.xml b/addons/portal/views/portal_templates.xml
index c02573f7613..fef256890ae 100644
--- a/addons/portal/views/portal_templates.xml
+++ b/addons/portal/views/portal_templates.xml
@@ -195,6 +195,21 @@
                 </li>
             </ul>
         </div>
+        <div t-if="searchbar_groupby" class="dropdown pull-right mr4">
+            <button id="portal_searchbar_groupby" class="o_portal_search_panel_fixed_width btn btn-default" type="button" data-toggle="dropdown">
+                <span class="fa fa-bars fa-lg" />
+                <span class='hidden-xs hidden-sm hidden-md' t-esc="searchbar_groupby[groupby].get('label', 'None')"/>
+                <span class="caret"></span>
+            </button>
+            <ul class="dropdown-menu" aria-labelledby="portal_searchbar_groupby">
+                <li t-foreach="searchbar_groupby" t-as="option" t-att-class="groupby == option and 'active'">
+                    <a t-att-href="default_url + '?' + keep_query('*', groupby=option)">
+                        <span t-esc="searchbar_groupby[option].get('label')"/>
+                    </a>
+                </li>
+            </ul>
+        </div>
+        
     </template>
 
     <template id="portal_contact" name="Contact">
diff --git a/addons/project/controllers/portal.py b/addons/project/controllers/portal.py
index e847875f2d1..105e90e9fba 100644
--- a/addons/project/controllers/portal.py
+++ b/addons/project/controllers/portal.py
@@ -2,10 +2,12 @@
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
 from collections import OrderedDict
+from operator import itemgetter
 
 from odoo import http, _
 from odoo.http import request
 from odoo.addons.portal.controllers.portal import get_records_pager, CustomerPortal, pager as portal_pager
+from odoo.tools import groupby as groupbyelem
 
 from odoo.osv.expression import OR
 
@@ -78,6 +80,7 @@ class CustomerPortal(CustomerPortal):
 
     @http.route(['/my/tasks', '/my/tasks/page/<int:page>'], type='http', auth="user", website=True)
     def portal_my_tasks(self, page=1, date_begin=None, date_end=None, sortby=None, filterby=None, search=None, search_in='content', **kw):
+        groupby = kw.get('groupby', 'project') #TODO master fix this
         values = self._prepare_portal_layout_values()
         searchbar_sortings = {
             'date': {'label': _('Newest'), 'order': 'create_date desc'},
@@ -95,6 +98,10 @@ class CustomerPortal(CustomerPortal):
             'stage': {'input': 'stage', 'label': _('Search in Stages')},
             'all': {'input': 'all', 'label': _('Search in All')},
         }
+        searchbar_groupby = {
+            'none': {'input': 'none', 'label': _('None')},
+            'project': {'input': 'project', 'label': _('Project')},
+        }
         # extends filterby criteria with project (criteria name is the project id)
         # Note: portal users can't view projects they don't follow
         projects = request.env['project.project'].sudo().search([('privacy_visibility', '=', 'portal')])
@@ -142,22 +149,31 @@ class CustomerPortal(CustomerPortal):
             step=self._items_per_page
         )
         # content according to pager and archive selected
+        if groupby == 'project':
+            order = "project_id, %s" % order  # force sort on project first to group by project in view
         tasks = request.env['project.task'].search(domain, order=order, limit=self._items_per_page, offset=pager['offset'])
         request.session['my_tasks_history'] = tasks.ids[:100]
+        if groupby == 'project':
+            grouped_tasks = [request.env['project.task'].concat(*g) for k, g in groupbyelem(tasks, itemgetter('project_id'))]
+        else:
+            grouped_tasks = [tasks]
 
         values.update({
             'date': date_begin,
             'date_end': date_end,
             'projects': projects,
-            'tasks': tasks,
+            'tasks': tasks, #TODO master remove this, grouped_tasks is enough
+            'grouped_tasks': grouped_tasks,
             'page_name': 'task',
             'archive_groups': archive_groups,
             'default_url': '/my/tasks',
             'pager': pager,
             'searchbar_sortings': searchbar_sortings,
+            'searchbar_groupby': searchbar_groupby,
             'searchbar_inputs': searchbar_inputs,
             'search_in': search_in,
             'sortby': sortby,
+            'groupby': groupby,
             'searchbar_filters': OrderedDict(sorted(searchbar_filters.items())),
             'filterby': filterby,
         })
diff --git a/addons/project/views/project_portal_templates.xml b/addons/project/views/project_portal_templates.xml
index c4c7261c893..1f24df5cef8 100644
--- a/addons/project/views/project_portal_templates.xml
+++ b/addons/project/views/project_portal_templates.xml
@@ -130,36 +130,41 @@
             <h3>Tasks
                 <t t-call="portal.portal_searchbar"/>
             </h3>
-            <t t-if="not tasks">
+            <t t-if="not grouped_tasks">
                 <div class="alert alert-warning mt8" role="alert">
                     There are no tasks.
                 </div>
             </t>
-            <div t-if="tasks" class="panel panel-default">
-                <div class="table-responsive"><table class="table table-hover o_portal_my_doc_table">
-                    <thead>
-                        <tr class="active">
-                            <th class="col-md-9">Task</th>
-                            <th class="col-md-2">Stage</th>
-                            <th>Ref</th>
-                        </tr>
-                    </thead>
-                    <tbody>
-                        <t t-foreach="tasks" t-as="task">
-                            <tr>
-                                <td>
-                                    <a t-attf-href="/my/task/#{task.id}?{{ keep_query() }}"><span t-field="task.name"/></a>
-                                </td>
-                                <td>
-                                    <span class="label label-info" title="Current stage of the task" t-esc="task.stage_id.name" />
-                                </td>
-                                <td>
-                                    <span t-esc="task.id"/>
-                                </td>
-                            </tr>
-                        </t>
-                    </tbody>
-                </table></div>
+            <div t-if="grouped_tasks" class="panel panel-default">
+                <div class="table-responsive">
+                    <t t-foreach="grouped_tasks" t-as="tasks">
+                        <table class="table table-hover o_portal_my_doc_table">
+                            <thead>
+                                <tr class="active">
+                                    <th t-if="groupby == 'none'" class="col-md-9">Name</th>
+                                    <th t-else="" class="col-md-9"><span t-field="tasks[0].project_id.label_tasks"/> for project: <span t-field="tasks[0].project_id.name"/></th>
+                                    <th class="col-md-2">Stage</th>
+                                    <th>Ref</th>
+                                </tr>
+                            </thead>
+                            <tbody>
+                                <t t-foreach="tasks" t-as="task">
+                                    <tr>
+                                        <td>
+                                            <a t-attf-href="/my/task/#{task.id}?{{ keep_query() }}"><span t-field="task.name"/></a>
+                                        </td>
+                                        <td>
+                                            <span class="label label-info" title="Current stage of the task" t-esc="task.stage_id.name" />
+                                        </td>
+                                        <td>
+                                            <span t-esc="task.id"/>
+                                        </td>
+                                    </tr>
+                                </t>
+                            </tbody>
+                        </table>
+                    </t>
+                </div>
             </div>
             <div t-if="pager" class="o_portal_pager text-center">
                 <t t-call="portal.pager"/>