[IMP] html_editor: support frontend url in linkpopover preview

Previously, the link popover did not support frontend website pages
(e.g., /contactus, /shop, etc.).

Steps to reproduce:
- Enter edit mode.
- Click on a link to a frontend page, such as "Contact Us".
- An error was thrown in the browser console.
- Also, the link popover did not show the page description (even if it
  existed).

This commit:
- Fixes the error that occurred in the browser console.
- Adds support for frontend website pages in the link popover.
- Displays the page description in the linkpopover, if available.
  (The page description refers to the SEO field that can be set via:
  Site > This Page > Optimize SEO > Description)

Author: aans-odoo

addons/html_editor/controllers/main.py

@@ -586,14 +586,26 @@ def link_preview_metadata(self, preview_url):
             link_preview_data['og_description'] = html.fromstring(link_preview_data['og_description']).text_content()
         return link_preview_data
 
-    @http.route('/html_editor/link_preview_internal', type="jsonrpc", auth="user", methods=['POST'])
+    @http.route('/html_editor/link_preview_internal', type="jsonrpc", auth="user", website=True, methods=['POST'])
     def link_preview_metadata_internal(self, preview_url):
         try:
             Actions = request.env['ir.actions.actions']
             context = dict(request.env.context)
             words = preview_url.strip('/').split('/')
 
-            record_id = int(words.pop())
+            try:
+                record_id = int(words.pop())
+            except ValueError:
+                # could be a frontend page
+                result = {}
+                page = self.env['website.page'].search([
+                    ('website_id', 'in', (False, request.website.id)),
+                    ('url', '=', preview_url),
+                ], limit=1)
+                if page and page.view_id.website_meta_description:
+                        result['description'] = page.view_id.website_meta_description
+                return result
+
             action_name = words.pop()
             if (action_name.startswith('m-') or '.' in action_name) and action_name in request.env and not request.env[action_name]._abstract:
                 # if path format is `odoo/<model>/<record_id>` so we use `action_name` as model name

addons/html_editor/tests/test_controller.py

@@ -182,18 +182,46 @@ def test_05_internal_link_preview(self):
         self.assertEqual(200, response_wrong_record.status_code)
         self.assertTrue('error_msg' in response_wrong_record.text)
 
-        # retrieve metadata of a url not directing to a record
-        response_not_record = self.url_open(
+        # retrieve metadata of a url directing to a frontend page (not a record)
+        # page without seo description set
+        view = self.env["ir.ui.view"].create({
+            "arch": """
+            <t t-name="website.my-page">
+                <h1>My Page</h1>
+            </t>""",
+            "type": "qweb"
+        })
+        self.env["website.page"].create({
+            "url": "/my-page",
+            "view_id": view.id,
+        })
+        response_frontend_page_no_seo = self.url_open(
             '/html_editor/link_preview_internal',
             data=json_safe.dumps({
                 "params": {
-                    "preview_url": "/odoo/users",
+                    "preview_url": "/my-page",
                 }
             }),
             headers=self.headers
         )
-        self.assertEqual(200, response_not_record.status_code)
-        self.assertTrue('other_error_msg' in response_not_record.text)
+        self.assertEqual(200, response_frontend_page_no_seo.status_code)
+        self.assertTrue('"result": {}' in response_frontend_page_no_seo.text)
+
+        # page with seo description set
+        self.env["ir.ui.view"].browse(view.id).update({
+            "website_meta_description": "My page description"
+        })
+        response_frontend_page_with_seo = self.url_open(
+            '/html_editor/link_preview_internal',
+            data=json_safe.dumps({
+                "params": {
+                    "preview_url": "/my-page",
+                }
+            }),
+            headers=self.headers
+        )
+        self.assertEqual(200, response_frontend_page_with_seo.status_code)
+        self.assertTrue('"result": {"description": "My page description"}' in response_frontend_page_with_seo.text)
 
         # Attempt to retrieve metadata for path format `odoo/<model>/<record_id>`
         response_model_record = self.url_open(