[FIX] website: fix conditional visibility based on file upload

At the moment, if we try to make a website field conditionally visible
based on whether a file has been uploaded, the field never appears even
after uploading the file.

Steps to reproduce issue
- Create a new fresh DB with the website app.
- Go to the Contact Us page, click on 'Edit'.
- Add a File Upload field
- Add another field, and set it to be conditionally visible on the
  File Upload field.

Fix:
- Create visibility comparators for files (fileSet / !fileSet), which
check whether the `value.name` property is set / not set.

opw-2856054

closes odoo#93756

X-original-commit: fec02f6
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>
Signed-off-by: Antoine Dupuis (andu) <andu@odoo.com>

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

@@ -545,6 +545,10 @@ odoo.define('website.s_website_form', function (require) {
                     return value >= comparable;
                 case 'less or equal':
                     return value <= comparable;
+                case 'fileSet':
+                    return value.name !== '';
+                case '!fileSet':
+                    return value.name === '';
             }
             // Date & Date Time comparison requires formatting the value
             if (value.includes(':')) {

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

@@ -1162,6 +1162,8 @@ options.registry.WebsiteFieldEditor = FieldEditor.extend({
                 return dependencyEl && dependencyEl.dataset.target && dependencyEl.dataset.target.includes('#datepicker');
             case 'hidden_condition_datetime_opt':
                 return dependencyEl && dependencyEl.dataset.target && dependencyEl.dataset.target.includes('#datetimepicker');
+            case 'hidden_condition_file_opt':
+                return dependencyEl && dependencyEl.type === 'file';
             case 'hidden_condition_opt':
                 return this.$target[0].classList.contains('s_website_form_field_hidden_if');
             case 'char_input_type_opt':
@@ -1256,6 +1258,8 @@ options.registry.WebsiteFieldEditor = FieldEditor.extend({
                 } else if (['text', 'email', 'tel', 'url', 'search', 'password', 'number'].includes(dependencyEl.type)
                         || dependencyEl.nodeName === 'TEXTAREA') {
                     this.$target[0].dataset.visibilityComparator = 'equal';
+                } else if (dependencyEl.type === 'file') {
+                    this.$target[0].dataset.visibilityComparator = 'fileSet';
                 }
             }
         }

addons/website/views/snippets/s_website_form.xml

@@ -179,6 +179,11 @@
                     <we-button data-select-data-attribute='between'>Is between (included)</we-button>
                     <we-button data-select-data-attribute='!between'>Is not between (excluded)</we-button>
                 </we-select>
+                <we-select data-name="hidden_condition_file_opt" data-attribute-name="visibilityComparator" data-no-preview="true">
+                    <!-- file comparator possibilities -->
+                    <we-button data-select-data-attribute="fileSet">Is set</we-button>
+                    <we-button data-select-data-attribute="!fileSet">Is not set</we-button>
+                </we-select>
             </we-row>
             <we-select class="o_we_large" data-name="hidden_condition_no_text_opt" data-attribute-name="visibilityCondition" data-no-preview="true">
                 <!-- checkbox, select, radio possible values -->