Reformat code

src/app/services/modal.service.ts

@@ -0,0 +1,83 @@
+import { Injectable } from '@angular/core';
+import { Tower } from '../model/tower';
+import { top } from '../utils/top';
+
+export enum ModalType {
+  createBlock,
+  editBlock,
+  removeBlock,
+  settings,
+  removeTower,
+  removePage,
+  getStarted
+}
+
+interface Modal {
+  type: ModalType;
+  input: any;
+  resolve: (output: any) => void;
+  reject: () => void;
+}
+
+@Injectable({
+  providedIn: 'root'
+})
+export class ModalService {
+  private modalStack: Modal[] = [];
+
+  showCreateBlock(options: string[]): Promise<{ selected: string; description: string; isDone: boolean }> {
+    return this.createPromiseAndPushToStack(options, ModalType.createBlock);
+  }
+
+  showEditBlock(data: {
+    default: string;
+    options: string[];
+    description: string;
+    isDone: boolean;
+  }): Promise<{ selected: string; description: string; isDone: boolean }> {
+    return this.createPromiseAndPushToStack(data, ModalType.editBlock);
+  }
+
+  showSettings(): Promise<void> {
+    return this.createPromiseAndPushToStack(null, ModalType.settings);
+  }
+
+  showRemoveTower(tower: Tower): Promise<void> {
+    return this.createPromiseAndPushToStack(tower, ModalType.removeTower);
+  }
+
+  showRemovePage(name: string): Promise<void> {
+    return this.createPromiseAndPushToStack(name, ModalType.removePage);
+  }
+
+  get active(): Modal {
+    return top(this.modalStack);
+  }
+
+  submit(output?: any) {
+    const { resolve } = this.modalStack.pop();
+    resolve(output);
+  }
+
+  cancel() {
+    const { reject } = this.modalStack.pop();
+    reject();
+  }
+
+  private createPromiseAndPushToStack(input: any, type: ModalType): Promise<any> {
+    const modal = {
+      input,
+      type,
+      resolve: () => {},
+      reject: () => {}
+    };
+
+    const modalPromise = new Promise((resolve, reject) => {
+      modal.resolve = resolve;
+      modal.reject = reject;
+    });
+
+    this.modalStack.push(modal);
+    return modalPromise;
+  }
+}