2 files changed, 89 insertions, 0 deletions
diff --git a/life2/game/index.js b/life2/game/index.js
index 276e452..f6c0ff5 100644
--- a/life2/game/index.js
+++ b/life2/game/index.js
@@ -24,3 +24,4 @@
 export {Board, Grid} from './board';
 export {Cell} from './cell';
 export {Rule, RuleFunction} from './rule';
+export {RulesManager} from './rules_manager';
diff --git a/life2/game/rules_manager.js b/life2/game/rules_manager.js
new file mode 100644
index 0000000..5dc0149
--- /dev/null
+++ b/life2/game/rules_manager.js
@@ -0,0 +1,88 @@
+/**
+ * Copyright 2024 The Life2 Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * @license
+ */
+
+/**
+ * @fileoverview RulesManager is a class responsible to manage a set of Rules,
+ * such as (un)registering some, enabling or disabling others...
+ *
+ * @package life2
+ */
+
+import {Rule} from './rule';
+
+/**
+ * The RulesManager class is responsible to manage a set of Rules, such as
+ * (un)registering some, enabling or disabling others...
+ */
+export class RulesManager {
+  /**
+   * Creates a new rules manager.
+   * @param {?Array<!Rule>} rules A list of rules to add and enable by default.
+   */
+  constructor(rules) {
+    /**
+     * The store of rules.
+     * @type {!Map<string, !Rule>}
+     * @private
+     */
+    this.store_ = new Map();
+    if (rules) rules.forEach((r) => this.add(r));
+  }
+
+  /**
+   * Returns the list of rules.
+   * @return {!Array<!Rule>} The list of rules.
+   */
+  getAll() {
+    return Array.from(this.store_.values());
+  }
+
+  /**
+   * Registers a new rule.
+   * @param {!Rule} rule The rule to register.
+   * @throws {Error} If the rule is already registered.
+   */
+  add(rule) {
+    if (this.has(rule.name)) {
+      throw new Error(`Rule '${rule.name}' is already registered.`);
+    }
+
+    this.store_.set(rule.name, rule);
+  }
+
+  /**
+   * Unregisters a rule.
+   * @param {string} rule The name of the rule to unregister.
+   * @return {!Rule} The rule that was unregistered.
+   * @throws {Error} If the rule is not registered.
+   */
+  remove(rule) {
+    if (!this.has(rule)) throw new Error(`Rule '${rule}' is not registered.`);
+    const r = this.store_.get(rule);
+    this.store_.delete(rule);
+    return r;
+  }
+
+  /**
+   * Checks if a rule is registered.
+   * @param {string} rule The name of the rule to check.
+   * @return {boolean} True if the rule is registered, false otherwise.
+   */
+  has(rule) {
+    return this.store_.has(rule);
+  }
+}