[IMP] (website_)mass_mailing: allows subscribing through the form snippet

PURPOSE

This commit adds the possibility the create a subscribing form from the
form snippet, it creates default inputs automatically.

LINKS

Task-2672194

Part-of: odoo/odoo#79582

addons/website_mass_mailing/__manifest__.py

@@ -12,6 +12,7 @@ On a simple click, your visitors can subscribe to mailing lists managed in the E
     'category': 'Website/Website',
     'depends': ['website', 'mass_mailing', 'google_recaptcha'],
     'data': [
+        'data/ir_model_data.xml',
         'views/snippets/s_popup.xml',
         'views/snippets_templates.xml',
     ],
@@ -26,6 +27,9 @@ On a simple click, your visitors can subscribe to mailing lists managed in the E
             'website_mass_mailing/static/src/scss/website_mass_mailing_edit_mode.scss',
             'website_mass_mailing/static/src/snippets/s_popup/options.js',
         ],
+        'website.assets_editor': [
+            'website_mass_mailing/static/src/js/mass_mailing_form_editor.js',
+        ],
         'web.assets_tests': [
             'website_mass_mailing/static/tests/**/*',
         ],

addons/website_mass_mailing/controllers/__init__.py

@@ -2,3 +2,4 @@
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
 from . import main
+from . import website_form

addons/website_mass_mailing/controllers/website_form.py

@@ -0,0 +1,23 @@
+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+import json
+
+from odoo import _
+from odoo.http import request
+from odoo.addons.website.controllers.form import WebsiteForm
+
+
+class WebsiteNewsletterForm(WebsiteForm):
+
+    def _handle_website_form(self, model_name, **kwargs):
+        if model_name == 'mailing.contact':
+            list_ids = [int(x) for x in kwargs['list_ids'].split(',')]
+            private_list_ids = request.env['mailing.list'].search([
+                ('id', 'in', list_ids), ('is_public', '=', False)])
+            if private_list_ids:
+                return json.dumps({
+                    'error': _('You cannot subscribe to the following list anymore : %s',
+                               ', '.join(private_list_ids.mapped('name')))
+                })
+        return super()._handle_website_form(model_name, **kwargs)

addons/website_mass_mailing/data/ir_model_data.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <data>
+        <record id="mass_mailing.model_mailing_contact" model="ir.model">
+            <field name="website_form_key">create_mailing_contact</field>
+            <field name="website_form_access">True</field>
+            <field name="website_form_label">Subscribe to Newsletter</field>
+        </record>
+
+        <function model="ir.model.fields" name="formbuilder_whitelist">
+            <value>mailing.contact</value>
+            <value eval="[
+                'name',
+                'company_name',
+                'title_id',
+                'email',
+                'list_ids',
+                'country_id',
+                'tag_ids',
+            ]"/>
+        </function>
+    </data>
+</odoo>

addons/website_mass_mailing/static/src/js/mass_mailing_form_editor.js

@@ -0,0 +1,26 @@
+/** @odoo-module **/
+
+import core from "web.core";
+import FormEditorRegistry from "website.form_editor_registry";
+
+const _t = core._t;
+
+FormEditorRegistry.add('create_mailing_contact', {
+    formFields: [{
+        name: 'name',
+        required: true,
+        string: _t('Your Name'),
+        type: 'char',
+    }, {
+        name: 'email',
+        required: true,
+        string: _t('Your Email'),
+        type: 'email',
+    }, {
+        name: 'list_ids',
+        relation: 'mailing.list',
+        required: true,
+        string: _t('Subscribe to'),
+        type: 'many2many',
+    }],
+});