feature(capabilities): add base collection ability class

addons/api/addon/abilities/collection.js

@@ -0,0 +1,36 @@
+import { Ability } from 'ember-can';
+
+/**
+ * Generic ability provides abilities common to all models in the API.
+ */
+export default class ModelAbility extends Ability {
+  // =permissions
+
+  /**
+   * @type {boolean}
+   */
+  get canList() {
+    return this.hasAuthorizedCollectionAction('list');
+  }
+
+  /**
+   * @type {boolean}
+   */
+  get canCreate() {
+    return this.hasAuthorizedCollectionAction('create');
+  }
+
+  // =methods
+
+  /**
+   * Returns true if the given action is contained in the ability model's
+   * `authorized_collection_actions` array.
+   * @param {string} action
+   * @return {boolean}
+   */
+  hasAuthorizedCollectionAction(action) {
+    const { authorized_collection_actions } = this.model;
+    const collection = this.collection || {};
+    return authorized_collection_actions[collection]?.includes(action);
+  }
+}