[FIX] mail_plugin: use the user language in context

Bug
===
When searching for projects from the Outlook / Gmail addins, the names
were not translated into the user's language.

Task-3486324

closes odoo/odoo#133704

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

addons/mail_plugin/models/ir_http.py

@@ -5,6 +5,8 @@ from werkzeug.exceptions import BadRequest
 
 from odoo import models
 from odoo.http import request
+from odoo.tools.misc import frozendict
+
 
 class IrHttp(models.AbstractModel):
     _inherit = 'ir.http'
@@ -24,3 +26,9 @@ class IrHttp(models.AbstractModel):
 
         # take the identity of the API key user
         request.uid = user_id
+
+        # switch to the user context
+        request.env.context = frozendict({
+            **request.env.context,
+            **request.env.user.sudo().context_get(),
+        })

addons/project_mail_plugin/tests/__init__.py

+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from . import test_controller

addons/project_mail_plugin/tests/test_controller.py

+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+import json
+from unittest.mock import patch
+
+from odoo.addons.mail_plugin.tests.common import TestMailPluginControllerCommon
+
+
+class TestMailPluginProjectController(TestMailPluginControllerCommon):
+    def test_user_lang(self):
+        """Verify that we translate field in the user language."""
+        self.env["res.lang"]._activate_lang("fr_BE")
+        self.env["res.lang"]._activate_lang("es_ES")
+        project = self.env["project.project"].create({"name": "Test Mail Plugin"})
+        project.with_context(lang="fr_BE").name = "[FR] Test Mail Plugin"
+        self.assertEqual(project.name, "Test Mail Plugin")
+
+        for lang, expected in (
+            (False, "Test Mail Plugin"),
+            ("en_US", "Test Mail Plugin"),
+            ("fr_BE", "[FR] Test Mail Plugin"),
+            ("es_ES", "Test Mail Plugin"),  # no translation
+        ):
+            self.user_test.lang = lang
+
+            data = {
+                "id": 0,
+                "jsonrpc": "2.0",
+                "method": "call",
+                "params": {"search_term": "Test Mail Plugin"},
+            }
+
+            with patch.object(
+                type(self.env["res.users.apikeys"]),
+                "_check_credentials",
+                new=lambda *args, **kwargs: self.user_test.id,
+            ):
+                result = self.url_open(
+                    "/mail_plugin/project/search",
+                    data=json.dumps(data).encode(),
+                    headers={
+                        "Content-Type": "application/json",
+                        "Authorization": "dummy",
+                    },
+                )
+
+            result = result.json().get("result")
+            self.assertEqual(len(result), 1)
+            self.assertEqual(result[0]["project_id"], project.id)
+            self.assertEqual(result[0]["name"], expected)