[IMP] hr_timesheet,helpdesk: Display remaining hours on a task

Show the remaining hours to timesheet on tasks. Allows to quickly evaluate
task's state.

This  is done in the name_get of a task through a context key, because we
need this different name on some views, not all.

related task #1856139

closes odoo/odoo#33586

Related: odoo/enterprise#4400
Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com>

addons/hr_timesheet/models/project.py

@@ -120,6 +120,17 @@ class Task(models.Model):
                 raise UserError(_('This task must be part of a project because there are some timesheets linked to it.'))
         return super(Task, self).write(values)
 
+    def name_get(self):
+        if self.env.context.get('hr_timesheet_display_remaining_hours'):
+            name_mapping = dict(super().name_get())
+            for task in self:
+                if task.allow_timesheets and task.planned_hours > 0:
+                    hours, mins = (str(int(duration)).rjust(2, '0') for duration in divmod(abs(task.remaining_hours) * 60, 60))
+                    hours_left = _("(%s%s:%s remaining)") % ('-' if task.remaining_hours < 0 else '', hours, mins)
+                    name_mapping[task.id] = name_mapping.get(task.id, '') + " ‒ " + hours_left
+            return list(name_mapping.items())
+        return super().name_get()
+
     @api.model
     def _fields_view_get(self, view_id=None, view_type='form', toolbar=False, submenu=False):
         """ Set the correct label for `unit_amount`, depending on company UoM """

addons/hr_timesheet/static/src/js/task_with_hours.js

@@ -0,0 +1,36 @@
+odoo.define('hr_timesheet.task_with_hours', function (require) {
+"use strict";
+
+var field_registry = require('web.field_registry');
+var relational_fields = require('web.relational_fields');
+var FieldMany2One = relational_fields.FieldMany2One;
+
+var TaskWithHours = FieldMany2One.extend({
+    /**
+     * @override
+     */
+    init: function () {
+        this._super.apply(this, arguments);
+        this.additionalContext.hr_timesheet_display_remaining_hours = true;
+    },
+    /**
+     * @override
+     */
+    _getDisplayNameWithoutHours: function (value) {
+        return value.split(' ‒ ')[0];
+    },
+    /**
+     * @override
+     * @private
+     */
+    _renderEdit: function (){
+        this.m2o_value = this._getDisplayNameWithoutHours(this.m2o_value);
+        this._super.apply(this, arguments);
+    },
+});
+
+field_registry.add('task_with_hours', TaskWithHours);
+
+return TaskWithHours;
+
+});

addons/hr_timesheet/views/assets.xml

@@ -3,6 +3,7 @@
     <template id="assets_backend" name="timesheet assets" inherit_id="web.assets_backend">
         <xpath expr="." position="inside">
             <script type="text/javascript" src="/hr_timesheet/static/src/js/timesheet_uom.js"></script>
+            <script type="text/javascript" src="/hr_timesheet/static/src/js/task_with_hours.js"></script>
         </xpath>
     </template>
 </odoo>

addons/hr_timesheet/views/hr_timesheet_views.xml

@@ -25,7 +25,7 @@
                     <field name="date"/>
                     <field name="name"/>
                     <field name="project_id" required="1" context="{'form_view_ref': 'project.project_project_view_form_simplified',}"/>
-                    <field name="task_id" context="{'default_project_id': project_id}" domain="[('project_id', '=', project_id)]"/>
+                    <field name="task_id" widget="task_with_hours" context="{'default_project_id': project_id}" domain="[('project_id', '=', project_id)]"/>
                     <field name="unit_amount" widget="timesheet_uom" sum="Total"/>
                     <field name="company_id" invisible="1"/>
                 </tree>
@@ -83,7 +83,7 @@
                             <group>
                                 <field name="date"/>
                                 <field name="project_id" required="1" context="{'form_view_ref': 'project.project_project_view_form_simplified',}"/>
-                                <field name="task_id"/>
+                                <field name="task_id" widget="task_with_hours"/>
                                 <field name="name"/>
                                 <field name="company_id" groups="base.group_multi_company"/>
                             </group>