Initial Move from Azure DevOps to GitHub

src/Common/ArrayHashMap.ts

@@ -0,0 +1,87 @@
+import { HashMap } from "./HashMap";
+
+/**
+ * Hash map of arrays which allows to:
+ * - push an item by key: add to array and create array if needed
+ * - remove item by key: remove from array and delete array if needed
+ */
+
+export class ArrayHashMap<T> {
+  private store: HashMap<T[]>;
+
+  constructor() {
+    this.store = new HashMap();
+  }
+
+  public has(key: string): boolean {
+    return this.store.has(key);
+  }
+
+  public get(key: string): T[] {
+    return this.store.get(key);
+  }
+
+  public size(): number {
+    return this.store.size();
+  }
+
+  public clear(): void {
+    this.store.clear();
+  }
+
+  public keys(): string[] {
+    return this.store.keys();
+  }
+
+  public delete(key: string): boolean {
+    return this.store.delete(key);
+  }
+
+  public forEach(key: string, iteratorFct: (value: T) => void) {
+    const values = this.store.get(key);
+    if (values) {
+      values.forEach(value => iteratorFct(value));
+    }
+  }
+
+  /**
+   * Insert item into array.
+   * If no array, create one.
+   * If item already in array, return.
+   * @param key
+   * @param item
+   */
+  public push(key: string, item: T): void {
+    let itemsArray: T[] = this.store.get(key);
+    if (!itemsArray) {
+      itemsArray = [item];
+      this.store.set(key, itemsArray);
+      return;
+    }
+
+    if (itemsArray.indexOf(item) === -1) {
+      itemsArray.push(item);
+    }
+  }
+
+  /**
+   * Remove item from array.
+   * If array is empty, remove array.
+   * @param key
+   * @param itemToRemove
+   */
+  public remove(key: string, itemToRemove: T) {
+    if (!this.store.has(key)) {
+      return;
+    }
+
+    const itemsArray = this.store.get(key);
+    const index = itemsArray.indexOf(itemToRemove);
+    if (index >= 0) {
+      itemsArray.splice(index, 1);
+      if (itemsArray.length === 0) {
+        this.store.delete(key);
+      }
+    }
+  }
+}