참고소스 수정본

참고/playwright-main/packages/isomorphic/multimap.ts

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+/**
+ * Copyright (c) Microsoft Corporation.
+ *
+ * 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.
+ */
+
+export class MultiMap<K, V> {
+  private _map: Map<K, V[]>;
+
+  constructor() {
+    this._map = new Map<K, V[]>();
+  }
+
+  set(key: K, value: V) {
+    let values = this._map.get(key);
+    if (!values) {
+      values = [];
+      this._map.set(key, values);
+    }
+    values.push(value);
+  }
+
+  get(key: K): V[] {
+    return this._map.get(key) || [];
+  }
+
+  has(key: K): boolean {
+    return this._map.has(key);
+  }
+
+  delete(key: K, value: V) {
+    const values = this._map.get(key);
+    if (!values)
+      return;
+    if (values.includes(value))
+      this._map.set(key, values.filter(v => value !== v));
+  }
+
+  deleteAll(key: K) {
+    this._map.delete(key);
+  }
+
+  hasValue(key: K, value: V): boolean {
+    const values = this._map.get(key);
+    if (!values)
+      return false;
+    return values.includes(value);
+  }
+
+  get size(): number {
+    return this._map.size;
+  }
+
+  [Symbol.iterator](): Iterator<[K, V[]]> {
+    return this._map[Symbol.iterator]();
+  }
+
+  keys(): IterableIterator<K> {
+    return this._map.keys();
+  }
+
+  values(): Iterable<V> {
+    const result: V[] = [];
+    for (const key of this.keys())
+      result.push(...this.get(key));
+    return result;
+  }
+
+  clear() {
+    this._map.clear();
+  }
+}