first commit

app/lib/persistence/db.ts

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+import type { Message } from 'ai';
+import { createScopedLogger } from '~/utils/logger';
+import type { ChatHistoryItem } from './useChatHistory';
+
+const logger = createScopedLogger('ChatHistory');
+
+// this is used at the top level and never rejects
+export async function openDatabase(): Promise<IDBDatabase | undefined> {
+  if (typeof indexedDB === 'undefined') {
+    console.error('indexedDB is not available in this environment.');
+    return undefined;
+  }
+
+  return new Promise((resolve) => {
+    const request = indexedDB.open('boltHistory', 1);
+
+    request.onupgradeneeded = (event: IDBVersionChangeEvent) => {
+      const db = (event.target as IDBOpenDBRequest).result;
+
+      if (!db.objectStoreNames.contains('chats')) {
+        const store = db.createObjectStore('chats', { keyPath: 'id' });
+        store.createIndex('id', 'id', { unique: true });
+        store.createIndex('urlId', 'urlId', { unique: true });
+      }
+    };
+
+    request.onsuccess = (event: Event) => {
+      resolve((event.target as IDBOpenDBRequest).result);
+    };
+
+    request.onerror = (event: Event) => {
+      resolve(undefined);
+      logger.error((event.target as IDBOpenDBRequest).error);
+    };
+  });
+}
+
+export async function getAll(db: IDBDatabase): Promise<ChatHistoryItem[]> {
+  return new Promise((resolve, reject) => {
+    const transaction = db.transaction('chats', 'readonly');
+    const store = transaction.objectStore('chats');
+    const request = store.getAll();
+
+    request.onsuccess = () => resolve(request.result as ChatHistoryItem[]);
+    request.onerror = () => reject(request.error);
+  });
+}
+
+export async function setMessages(
+  db: IDBDatabase,
+  id: string,
+  messages: Message[],
+  urlId?: string,
+  description?: string,
+  timestamp?: string,
+): Promise<void> {
+  return new Promise((resolve, reject) => {
+    const transaction = db.transaction('chats', 'readwrite');
+    const store = transaction.objectStore('chats');
+
+    if (timestamp && isNaN(Date.parse(timestamp))) {
+      reject(new Error('Invalid timestamp'));
+      return;
+    }
+
+    const request = store.put({
+      id,
+      messages,
+      urlId,
+      description,
+      timestamp: timestamp ?? new Date().toISOString(),
+    });
+
+    request.onsuccess = () => resolve();
+    request.onerror = () => reject(request.error);
+  });
+}
+
+export async function getMessages(db: IDBDatabase, id: string): Promise<ChatHistoryItem> {
+  return (await getMessagesById(db, id)) || (await getMessagesByUrlId(db, id));
+}
+
+export async function getMessagesByUrlId(db: IDBDatabase, id: string): Promise<ChatHistoryItem> {
+  return new Promise((resolve, reject) => {
+    const transaction = db.transaction('chats', 'readonly');
+    const store = transaction.objectStore('chats');
+    const index = store.index('urlId');
+    const request = index.get(id);
+
+    request.onsuccess = () => resolve(request.result as ChatHistoryItem);
+    request.onerror = () => reject(request.error);
+  });
+}
+
+export async function getMessagesById(db: IDBDatabase, id: string): Promise<ChatHistoryItem> {
+  return new Promise((resolve, reject) => {
+    const transaction = db.transaction('chats', 'readonly');
+    const store = transaction.objectStore('chats');
+    const request = store.get(id);
+
+    request.onsuccess = () => resolve(request.result as ChatHistoryItem);
+    request.onerror = () => reject(request.error);
+  });
+}
+
+export async function deleteById(db: IDBDatabase, id: string): Promise<void> {
+  return new Promise((resolve, reject) => {
+    const transaction = db.transaction('chats', 'readwrite');
+    const store = transaction.objectStore('chats');
+    const request = store.delete(id);
+
+    request.onsuccess = () => resolve(undefined);
+    request.onerror = () => reject(request.error);
+  });
+}
+
+export async function getNextId(db: IDBDatabase): Promise<string> {
+  return new Promise((resolve, reject) => {
+    const transaction = db.transaction('chats', 'readonly');
+    const store = transaction.objectStore('chats');
+    const request = store.getAllKeys();
+
+    request.onsuccess = () => {
+      const highestId = request.result.reduce((cur, acc) => Math.max(+cur, +acc), 0);
+      resolve(String(+highestId + 1));
+    };
+
+    request.onerror = () => reject(request.error);
+  });
+}
+
+export async function getUrlId(db: IDBDatabase, id: string): Promise<string> {
+  const idList = await getUrlIds(db);
+
+  if (!idList.includes(id)) {
+    return id;
+  } else {
+    let i = 2;
+
+    while (idList.includes(`${id}-${i}`)) {
+      i++;
+    }
+
+    return `${id}-${i}`;
+  }
+}
+
+async function getUrlIds(db: IDBDatabase): Promise<string[]> {
+  return new Promise((resolve, reject) => {
+    const transaction = db.transaction('chats', 'readonly');
+    const store = transaction.objectStore('chats');
+    const idList: string[] = [];
+
+    const request = store.openCursor();
+
+    request.onsuccess = (event: Event) => {
+      const cursor = (event.target as IDBRequest<IDBCursorWithValue>).result;
+
+      if (cursor) {
+        idList.push(cursor.value.urlId);
+        cursor.continue();
+      } else {
+        resolve(idList);
+      }
+    };
+
+    request.onerror = () => {
+      reject(request.error);
+    };
+  });
+}
+
+export async function forkChat(db: IDBDatabase, chatId: string, messageId: string): Promise<string> {
+  const chat = await getMessages(db, chatId);
+
+  if (!chat) {
+    throw new Error('Chat not found');
+  }
+
+  // Find the index of the message to fork at
+  const messageIndex = chat.messages.findIndex((msg) => msg.id === messageId);
+
+  if (messageIndex === -1) {
+    throw new Error('Message not found');
+  }
+
+  // Get messages up to and including the selected message
+  const messages = chat.messages.slice(0, messageIndex + 1);
+
+  return createChatFromMessages(db, chat.description ? `${chat.description} (fork)` : 'Forked chat', messages);
+}
+
+export async function duplicateChat(db: IDBDatabase, id: string): Promise<string> {
+  const chat = await getMessages(db, id);
+
+  if (!chat) {
+    throw new Error('Chat not found');
+  }
+
+  return createChatFromMessages(db, `${chat.description || 'Chat'} (copy)`, chat.messages);
+}
+
+export async function createChatFromMessages(
+  db: IDBDatabase,
+  description: string,
+  messages: Message[],
+): Promise<string> {
+  const newId = await getNextId(db);
+  const newUrlId = await getUrlId(db, newId); // Get a new urlId for the duplicated chat
+
+  await setMessages(
+    db,
+    newId,
+    messages,
+    newUrlId, // Use the new urlId
+    description,
+  );
+
+  return newUrlId; // Return the urlId instead of id for navigation
+}
+
+export async function updateChatDescription(db: IDBDatabase, id: string, description: string): Promise<void> {
+  const chat = await getMessages(db, id);
+
+  if (!chat) {
+    throw new Error('Chat not found');
+  }
+
+  if (!description.trim()) {
+    throw new Error('Description cannot be empty');
+  }
+
+  await setMessages(db, id, chat.messages, chat.urlId, description, chat.timestamp);
+}