[IMP] web: add Registry predicate

Before this commit, any value could be added to registries and the class
needed to be overridden to assert that added values would answer to a
certain predicate.

Now, the registry can be instantiated with a given predicate function
that all added value must pass to be registered (default: all values
are accepted).

Existing implentations have been adapted:
- FieldRegistry
- FieldRegistryOwl.

1 files changed, 12 insertions, 1 deletions

diff --git a/addons/web/static/src/js/core/registry.js b/addons/web/static/src/js/core/registry.js
index 7b2c69db180..1ab16236e59 100644
--- a/addons/web/static/src/js/core/registry.js
+++ b/addons/web/static/src/js/core/registry.js
@@ -20,13 +20,21 @@ odoo.define("web.Registry", function (require) {
      */
     class Registry {
         /**
+         * @function predicate
+         * @param {any} value
+         * @returns {boolean}
+         */
+        /**
          * @param {Object} [mapping] the initial data in the registry
+         * @param {predicate} [predicate=(() => true)] predicate that each
+         *      added value must pass to be registered.
          */
-        constructor(mapping) {
+        constructor(mapping, predicate = () => true) {
             this.map = Object.create(mapping || null);
             this._scoreMapping = Object.create(null);
             this._sortedKeys = null;
             this.listeners = []; // listening callbacks on newly added items.
+            this.predicate = predicate;
         }
 
         //--------------------------------------------------------------------------
@@ -42,6 +50,9 @@ odoo.define("web.Registry", function (require) {
          * @returns {Registry} can be used to chain add calls.
          */
         add(key, value, score) {
+            if (!this.predicate(value)) {
+                throw new Error(`Value of key "${key}" does not pass the addition predicate.`);
+            }
             this._scoreMapping[key] = score === undefined ? key : score;
             this._sortedKeys = null;
             this.map[key] = value;