[IMP] base, website: prefill the country phone code in website forms

Before this commit the phone fields inside forms did start in a blank
state.

After this commit the empty phone fields are pre-filled with "+" and the
country phone code.
The country is determined based on the IP address with the GeoIP
database.  The phone code is obtained from `res.country` where it is
kept in cache.

task-2463563

closes odoo/odoo#78068

Signed-off-by: Romain Derie (rde) <rde@odoo.com>
Co-authored-by: Benoit Socias <bso@odoo.com>

addons/website/models/ir_http.py

@@ -438,9 +438,12 @@ class Http(models.AbstractModel):
     @api.model
     def get_frontend_session_info(self):
         session_info = super(Http, self).get_frontend_session_info()
+        geoip_country_code = request.session.get('geoip', {}).get('country_code')
+        geoip_phone_code = request.env['res.country']._phone_code_for(geoip_country_code) if geoip_country_code else None
         session_info.update({
             'is_website_user': request.env.user.id == request.website.user_id.id,
-            'geoip_country_code': request.session.get('geoip', {}).get('country_code'),
+            'geoip_country_code': geoip_country_code,
+            'geoip_phone_code': geoip_phone_code,
         })
         if request.env.user.has_group('website.group_website_publisher'):
             session_info.update({

addons/website/static/src/snippets/s_website_form/000.js

@@ -68,7 +68,6 @@ odoo.define('website.s_website_form', function (require) {
                     args: [session.user_id, this._getUserPreFillFields()],
                 }))[0] || {};
             }
-
             return res;
         },
         start: function () {
@@ -140,7 +139,13 @@ odoo.define('website.s_website_form', function (require) {
                     $field.data('website_form_original_default_value', $field.val());
                 });
             }
-
+            if (session.geoip_phone_code) {
+                this.el.querySelectorAll('input[type="tel"]').forEach(telField => {
+                    if (!telField.value) {
+                        telField.value = '+' + session.geoip_phone_code;
+                    }
+                });
+            }
             // Check disabled states
             this.inputEls = this.$target[0].querySelectorAll('.s_website_form_field.s_website_form_field_hidden_if .s_website_form_input');
             this._disabledStates = new Map();

odoo/addons/base/models/res_country.py

@@ -3,7 +3,7 @@
 
 import re
 import logging
-from odoo import api, fields, models
+from odoo import api, fields, models, tools
 from odoo.osv import expression
 from odoo.exceptions import UserError
 from psycopg2 import IntegrityError
@@ -96,6 +96,11 @@ class Country(models.Model):
 
         return ids
 
+    @api.model
+    @tools.ormcache('code')
+    def _phone_code_for(self, code):
+        return self.search([('code', '=', code)]).phone_code
+
     @api.model_create_multi
     def create(self, vals_list):
         for vals in vals_list:
@@ -106,7 +111,11 @@ class Country(models.Model):
     def write(self, vals):
         if vals.get('code'):
             vals['code'] = vals['code'].upper()
-        return super(Country, self).write(vals)
+        res = super().write(vals)
+        if ('code' in vals or 'phone_code' in vals):
+            # Intentionally simplified by not clearing the cache in create and unlink.
+            self.clear_caches()
+        return res
 
     def get_address_fields(self):
         self.ensure_one()