apps: operators can now view backup logs and manage the backup task

we spun off the app backup as a separate task and this is not tracked
by app.taskId .

fixes #856

dashboard/src/models/AppsModel.js

@@ -172,6 +172,39 @@ function create() {
   return {
     name: 'AppsModel',
     getTask,
+    async listTasks(appId) {
+      let error, result;
+      try {
+        result = await fetcher.get(`${API_ORIGIN}/api/v1/apps/${appId}/tasks`, { access_token: accessToken });
+      } catch (e) {
+        error = e;
+      }
+
+      if (error || result.status !== 200) return [error || result];
+      return [null, result.body.tasks];
+    },
+    async getAppTask(appId, taskId) {
+      let error, result;
+      try {
+        result = await fetcher.get(`${API_ORIGIN}/api/v1/apps/${appId}/tasks/${taskId}`, { access_token: accessToken });
+      } catch (e) {
+        error = e;
+      }
+
+      if (error || result.status !== 200) return [error || result];
+      return [null, result.body];
+    },
+    async stopAppTask(appId, taskId) {
+      let error, result;
+      try {
+        result = await fetcher.post(`${API_ORIGIN}/api/v1/apps/${appId}/tasks/${taskId}/stop`, {}, { access_token: accessToken });
+      } catch (e) {
+        error = e;
+      }
+
+      if (error || result.status !== 204) return [error || result];
+      return [null];
+    },
     async install(appData, config) {
       const data = {
         subdomain: config.subdomain,

dashboard/src/models/LogsModel.js

@@ -25,7 +25,7 @@ function ab2str(buf) {
   return String.fromCharCode.apply(null, new Uint16Array(buf));
 }
 
-export function create(type, id) {
+export function create(type, id, options = {}) {
   const accessToken = localStorage.token;
   const INITIAL_STREAM_LINES = 100;
 
@@ -46,6 +46,9 @@ export function create(type, id) {
   } else if (type === 'service') {
     streamApi = `/api/v1/services/${id}/logstream`;
     downloadApi = `/api/v1/services/${id}/logs`;
+  } else if (type === 'task' && options.appId) {
+    streamApi = `/api/v1/apps/${options.appId}/tasks/${id}/logstream`;
+    downloadApi = `/api/v1/apps/${options.appId}/tasks/${id}/logs`;
   } else if (type === 'task') {
     streamApi = `/api/v1/tasks/${id}/logstream`;
     downloadApi = `/api/v1/tasks/${id}/logs`;