Merged PR 1: Develop todo list page.

Related work items: #1

1 files changed, 68 insertions, 0 deletions

diff --git a/Timeline/ClientApp/src/app/todo-list.service.ts b/Timeline/ClientApp/src/app/todo-list.service.ts
new file mode 100644
index 00000000..238919d3
--- /dev/null
+++ b/Timeline/ClientApp/src/app/todo-list.service.ts
@@ -0,0 +1,68 @@
+import { Injectable } from '@angular/core';
+import { HttpClient, HttpHeaders } from '@angular/common/http';
+import { Observable } from 'rxjs';
+import { switchMap, concatMap, map, toArray } from 'rxjs/operators';
+
+interface WiqlWorkItemResult {
+  id: number;
+  url: string;
+}
+
+interface WiqlResult {
+  workItems: WiqlWorkItemResult[];
+}
+
+interface WorkItemResult {
+  id: number;
+  fields: { [name: string]: any };
+}
+
+export interface WorkItem {
+  id: number;
+  title: string;
+}
+
+@Injectable({
+  providedIn: 'root'
+})
+export class TodoListService {
+
+  private username = 'crupest';
+  private organization = 'crupest-web';
+  private project = 'Timeline';
+  private fieldId = 'System.Title';
+
+
+  constructor(private client: HttpClient) { }
+
+  private getAzureDevOpsPat(): Observable<string> {
+    return this.client.get('/api/TodoList/AzureDevOpsPat', {
+      headers: {
+        'Accept': 'text/plain'
+      },
+      responseType: 'text'
+    });
+  }
+
+  getWorkItemList(): Observable<WorkItem[]> {
+    return this.getAzureDevOpsPat().pipe(
+      switchMap(
+        pat => {
+          const headers = new HttpHeaders({
+            'Accept': 'application/json',
+            'Authorization': `Basic ${btoa(this.username + ':' + pat)}`
+          });
+          return this.client.post<WiqlResult>(
+            `https://dev.azure.com/${this.organization}/${this.project}/_apis/wit/wiql?api-version=5.0`, {
+              query: 'SELECT [System.Id] FROM workitems WHERE [System.TeamProject] = @project'
+            }, { headers: headers }).pipe(
+              switchMap(result => result.workItems),
+              concatMap(result => this.client.get<WorkItemResult>(result.url, { headers: headers })),
+              map(result => <WorkItem>{ id: result.id, title: result.fields[this.fieldId] }),
+              toArray()
+            );
+        }
+      )
+    );
+  }
+}