Merged API and Databank into Main branch

database/helpers/utils/chat_utils.ts

@@ -0,0 +1,86 @@
+/// <reference lib="deno.ns" />
+
+/**
+ * @author Esad Mustafoski
+ * @description This file is responsible for creating Functions to easily access the Database, Specifically for Chats
+ * @file chatUtil.ts
+ */
+
+// +++ IMPORTS ------------------------------------------------------ //
+import { DB } from "https://deno.land/x/sqlite@v3.9.1/mod.ts";
+import { Chat, Message } from "../interfaces.ts";
+import { mapChatRow, mapMessageRow, queryDatabase } from "./mod.ts";
+
+async function getUserChats(db: DB, userId: string): Promise<Chat[]> {
+  const query = `SELECT * FROM chats WHERE participants LIKE '%${userId}%'`;
+  return await queryDatabase<Chat>(db, query, [], mapChatRow);
+}
+
+async function getChatById(db: DB, chatId: string): Promise<Chat | null> {
+  const query = `SELECT * FROM chats WHERE chat_id = ?`;
+  const chats = await queryDatabase<Chat>(db, query, [chatId], mapChatRow);
+  return chats.length > 0 ? chats[0] : null;
+}
+
+async function getChatMessages(db: DB, chatId: string): Promise<Message[]> {
+  const query =
+    `SELECT * FROM messages WHERE chat_id = ? ORDER BY timestamp ASC`;
+  return await queryDatabase<Message>(db, query, [chatId], mapMessageRow);
+}
+
+async function createChat(
+  db: DB,
+  participants: string[],
+  chatName: string,
+): Promise<string> {
+  const participantsJson = JSON.stringify(participants);
+  const timestamp = `${Math.floor(Date.now() / 1000)}-${
+    new Date().toLocaleDateString("en-GB").split("/").join("-")
+  }`;
+
+  const query = `
+    INSERT INTO chats (chat_name, participants, created_at)
+    VALUES (?, ?, ?)
+  `;
+
+  db.query(query, [chatName, participantsJson, timestamp]);
+  return db.lastInsertRowId.toString();
+}
+
+async function addMessageToChat(
+  db: DB,
+  chatId: string,
+  senderId: string,
+  content: string,
+): Promise<string> {
+  const timestamp = `${Math.floor(Date.now() / 1000)}-${
+    new Date().toLocaleDateString("en-GB").split("/").join("-")
+  }`;
+
+  const query = `
+    INSERT INTO messages (chat_id, sender_id, content, timestamp)
+    VALUES (?, ?, ?, ?)
+  `;
+
+  db.query(query, [chatId, senderId, content, timestamp]);
+  return db.lastInsertRowId.toString();
+}
+
+async function deleteChat(db: DB, chatId: string): Promise<void> {
+  // First delete all messages in the chat
+  const deleteMessagesQuery = `DELETE FROM messages WHERE chat_id = ?`;
+  db.query(deleteMessagesQuery, [chatId]);
+
+  // Then delete the chat itself
+  const deleteChatQuery = `DELETE FROM chats WHERE chat_id = ?`;
+  db.query(deleteChatQuery, [chatId]);
+}
+
+export {
+  getUserChats,
+  getChatById,
+  getChatMessages,
+  createChat,
+  addMessageToChat,
+  deleteChat
+};