Add basically support for encrypted app list syncing

src/function/sync/apply-actions/dispatch-app-logic-action/sendkeyrequest.ts

@@ -0,0 +1,76 @@
+/*
+ * server component for the TimeLimit App
+ * Copyright (C) 2019 - 2022 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 { SendKeyRequestAction } from '../../../../action'
+import { Cache } from '../cache'
+import { SourceFamilyNotFoundException } from '../exception/illegal-state'
+
+export async function dispatchSendKeyRequestAction ({ action, cache, deviceId }: {
+  deviceId: string
+  action: SendKeyRequestAction
+  cache: Cache
+}) {
+  const familyEntryUnsafe = await cache.database.family.findOne({
+    where: {
+      familyId: cache.familyId
+    },
+    transaction: cache.transaction,
+    attributes: ['nextServerKeyRequestSeq']
+  })
+
+  if (!familyEntryUnsafe) {
+    throw new SourceFamilyNotFoundException()
+  }
+
+  const serverSequenceNumber = familyEntryUnsafe.nextServerKeyRequestSeq
+
+  await cache.database.family.update({
+    nextServerKeyRequestSeq: (parseInt(serverSequenceNumber, 10) + 1).toString(10)
+  }, {
+    where: {
+      familyId: cache.familyId
+    },
+    transaction: cache.transaction
+  })
+
+  await cache.database.keyRequest.destroy({
+    where: {
+      familyId: cache.familyId,
+      senderDeviceId: deviceId,
+      type: action.type,
+      deviceId: action.deviceId || null,
+      categoryId: action.categoryId || null
+    },
+    transaction: cache.transaction
+  })
+
+  await cache.database.keyRequest.create({
+    familyId: cache.familyId,
+    serverSequenceNumber: serverSequenceNumber,
+    senderDeviceId: deviceId,
+    senderSequenceNumber: action.deviceSequenceNumber.toString(10),
+    deviceId: action.deviceId || null,
+    categoryId: action.categoryId || null,
+    type: action.type,
+    tempKey: action.tempKey,
+    signature: action.signature
+  }, {
+    transaction: cache.transaction
+  })
+
+  cache.areChangesImportant = true
+}