Refactor exception usage

src/function/sync/apply-actions/baseinfo.ts

@@ -0,0 +1,72 @@
+/*
+ * server component for the TimeLimit App
+ * Copyright (C) 2019 - 2020 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 { Unauthorized } from 'http-errors'
+import { Database, Transaction } from '../../../database'
+import { SourceFamilyNotFoundException } from './exception/illegal-state'
+
+export interface ApplyActionBaseInfo {
+  familyId: string
+  deviceId: string
+  nextSequenceNumber: number
+  hasFullVersion: boolean
+}
+
+export async function getApplyActionBaseInfo ({ database, transaction, deviceAuthToken }: {
+  database: Database
+  transaction: Transaction
+  deviceAuthToken: string
+}): Promise<ApplyActionBaseInfo> {
+  const deviceEntryUnsafe = await database.device.findOne({
+    where: { deviceAuthToken },
+    attributes: ['familyId', 'deviceId', 'nextSequenceNumber'],
+    transaction
+  })
+
+  if (!deviceEntryUnsafe) {
+    throw new Unauthorized()
+  }
+
+  const deviceEntry = {
+    familyId: deviceEntryUnsafe.familyId,
+    deviceId: deviceEntryUnsafe.deviceId,
+    nextSequenceNumber: deviceEntryUnsafe.nextSequenceNumber
+  }
+
+  const familyEntryUnsafe = await database.family.findOne({
+    where: {
+      familyId: deviceEntry.familyId
+    },
+    transaction,
+    attributes: ['hasFullVersion']
+  })
+
+  if (!familyEntryUnsafe) {
+    throw new SourceFamilyNotFoundException()
+  }
+
+  const familyEntry = {
+    hasFullVersion: familyEntryUnsafe.hasFullVersion
+  }
+
+  return {
+    familyId: deviceEntry.familyId,
+    deviceId: deviceEntry.deviceId,
+    nextSequenceNumber: deviceEntry.nextSequenceNumber,
+    hasFullVersion: familyEntry.hasFullVersion
+  }
+}