Initial commit

src/infrastructure/Repository/InMemoryRepository.ts

@@ -0,0 +1,40 @@
+import { IEntity } from '../Entity/IEntity';
+import { IRepository } from './IRepository';
+
+export class InMemoryRepository<TKey, TEntity extends IEntity<TKey>> implements IRepository<TKey, TEntity> {
+    private readonly items: TEntity[];
+    constructor(items?: TEntity[]) {
+        this.items = items || new Array<TEntity>();
+    }
+
+    public get length(): number {
+        return this.items.length;
+    }
+
+    public getItems(predicate?: (entity: TEntity) => boolean): TEntity[] {
+        return predicate ? this.items.filter(predicate) : this.items;
+    }
+
+    public addItem(item: TEntity): void {
+        if (!item) {
+            throw new Error('Item is null');
+        }
+        if (this.exists(item)) {
+            throw new Error(`Cannot add (id: ${item.id}) as it is already exists`);
+        }
+        this.items.push(item);
+    }
+
+    public removeItem(id: TKey): void {
+        const index = this.items.findIndex((item) => item.id === id);
+        if (index === -1) {
+            throw new Error(`Cannot remove (id: ${id}) as it does not exist`);
+        }
+        this.items.splice(index, 1);
+    }
+
+    public exists(entity: TEntity): boolean {
+        const index = this.items.findIndex((item) => item.id === entity.id);
+        return index !== -1;
+    }
+}