Initial commit

src/function/websocket/index.ts

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+/*
+ * server component for the TimeLimit App
+ * Copyright (C) 2019 Jonas Lochmann
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import * as Sequelize from 'sequelize'
+import { Database } from '../../database'
+import { WebsocketApi } from '../../websocket'
+
+// this should be called AFTER an transaction was commited
+export const notifyClientsAboutChanges = async ({ familyId, sourceDeviceId, database, websocket, isImportant }: {
+  familyId: string
+  sourceDeviceId: string | null  // this device will not get an push
+  database: Database
+  websocket: WebsocketApi
+  isImportant: boolean
+}) => {
+  const relatedDeviceEntries = (await database.device.findAll({
+    where: sourceDeviceId ? {
+      familyId,
+      deviceId: {
+        [Sequelize.Op.not]: sourceDeviceId
+      }
+    } : {
+      familyId
+    },
+    attributes: ['deviceAuthToken']
+  })).map((item) => ({
+    deviceAuthToken: item.deviceAuthToken
+  }))
+
+  relatedDeviceEntries.forEach((item) => {
+    websocket.triggerSyncByDeviceAuthToken({
+      deviceAuthToken: item.deviceAuthToken,
+      isImportant
+    })
+  })
+}