enterfront

server/routers/epja-2024-1/enterfront/db.js

@@ -0,0 +1,74 @@
+// Read already defined users (pseudo-DB)
+const users = require('./auth/users.json');
+const chats = require('./chat/chats.json');
+
+const getUserFromDB = (userID) => {
+    if (!userID) {return false;}
+
+    // Accessing 'DB'
+    const user = users.find((user) => user.id === userID);
+
+    if (user) {
+        return user;
+    } else {
+        return false;
+    }
+}
+
+const deleteUserFromDB = (userID) => {
+    const index = users.findIndex(item => item.id === userID);
+    if (index !== -1) {
+        users.splice(index, 1);
+    }
+}
+
+const addUserToDB = (user) => {
+    users.push(user);
+}
+
+const getChatFromDB = (firstID, secondID) => {
+    if (!firstID || !secondID) {return false;}
+
+    // Accessing 'DB'
+    const chat = chats.find((item) =>
+        (item.id1 === firstID && item.id2 === secondID) || (item.id1 === secondID && item.id2 === firstID));
+
+    if (chat) {
+        return chat;
+    } else {
+        return false;
+    }
+}
+
+const getUsersChats = (userID) => {
+    if (!userID) {return false;}
+
+    const userChats = chats.filter((chat) => (chat.id1 === userID || chat.id2 === userID));
+
+    if (userChats) {
+        return userChats;
+    } else {
+        return false;
+    }
+}
+
+const addMessageToChat = (chat, msg) => {
+    chat.messages.push(msg);
+}
+
+const deleteChatFromDB = (firstID, secondID) => {
+    const index = chats.findIndex(item =>
+        (item.id1 === firstID && item.id2 === secondID) || (item.id1 === secondID && item.id2 === firstID));
+
+    if (index !== -1) {
+        chats.splice(index, 1);
+    }
+}
+
+const addChatToDB = (chat) => {
+    chats.push(chat);
+}
+
+
+module.exports = {users, chats, getUserFromDB, getChatFromDB, addUserToDB,
+    deleteUserFromDB, addChatToDB, deleteChatFromDB, getUsersChats, addMessageToChat}