Промежуточный этап синхронизации

app/providers/DialogProvider/useSynchronize.ts

@@ -0,0 +1,57 @@
+import { useEffect } from "react";
+import { useProtocolState } from "../ProtocolProvider/useProtocolState";
+import { ProtocolState } from "../ProtocolProvider/ProtocolProvider";
+import { useDatabase } from "../DatabaseProvider/useDatabase";
+import { usePublicKey } from "../AccountProvider/usePublicKey";
+import { PacketSync, SyncStatus } from "../ProtocolProvider/protocol/packets/packet.sync";
+import { useSender } from "../ProtocolProvider/useSender";
+import { usePacket } from "../ProtocolProvider/usePacket";
+import { whenFinish } from "./dialogQueue";
+
+/**
+ * Хук отвечает за синхронизацию сообщений, запрос синхронизации
+ * при подключении
+ */
+export function useSynchronize() {
+    const [protocolState, setProtocolState] = useProtocolState();
+    const {getQuery} = useDatabase();
+    const publicKey = usePublicKey();
+    const send = useSender();
+
+    useEffect(() => {
+        if(protocolState == ProtocolState.CONNECTED){
+            trySync();
+            setProtocolState(ProtocolState.SYNCHRONIZATION);
+        }
+    }, [protocolState]);
+
+    const trySync = async () => {
+        const lastMessage = await getQuery("SELECT timestamp FROM messages WHERE account = ? ORDER BY timestamp DESC LIMIT 1", [publicKey]);
+        if(!lastMessage){
+            sendSynchronize(0);
+            return;
+        }
+        sendSynchronize(lastMessage.timestamp);
+    }
+
+    const sendSynchronize = (timestamp: number) => {
+        const packet = new PacketSync();
+        packet.setStatus(0);
+        packet.setTimestamp(timestamp);
+        send(packet);
+    }
+
+    usePacket(25, async (packet: PacketSync) => {
+        const status = packet.getStatus();
+        if(status == SyncStatus.BATCH_END){
+            await whenFinish();
+            trySync();
+        }
+        if(status == SyncStatus.NOT_NEEDED){
+            /**
+             * Синхронизация не нужна, все данные актуальны
+             */
+            setProtocolState(ProtocolState.CONNECTED);
+        }
+    });
+}