246 lines
8.6 KiB
JavaScript
246 lines
8.6 KiB
JavaScript
/**
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* Apply Redis helper functions
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* @param pubClient
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* @param app
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* @param logger
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*/
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const applyRedisHelpers = ({ pubClient, app, logger }) => {
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// Store session data in Redis
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const setSessionData = async (socketId, key, value) => {
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try {
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await pubClient.hset(`socket:${socketId}`, key, JSON.stringify(value)); // Use Redis pubClient
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} catch (error) {
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logger.log(`Error Setting Session Data for socket ${socketId}: ${error}`, "ERROR", "redis");
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}
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};
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// Retrieve session data from Redis
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const getSessionData = async (socketId, key) => {
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try {
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const data = await pubClient.hget(`socket:${socketId}`, key);
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return data ? JSON.parse(data) : null;
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} catch (error) {
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logger.log(`Error Getting Session Data for socket ${socketId}: ${error}`, "ERROR", "redis");
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}
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};
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// Clear session data from Redis
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const clearSessionData = async (socketId) => {
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try {
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await pubClient.del(`socket:${socketId}`);
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} catch (error) {
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logger.log(`Error Clearing Session Data for socket ${socketId}: ${error}`, "ERROR", "redis");
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}
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};
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// Store multiple session data in Redis
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const setMultipleSessionData = async (socketId, keyValues) => {
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try {
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// keyValues is expected to be an object { key1: value1, key2: value2, ... }
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const entries = Object.entries(keyValues).map(([key, value]) => [key, JSON.stringify(value)]);
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await pubClient.hset(`socket:${socketId}`, ...entries.flat());
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} catch (error) {
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logger.log(`Error Setting Multiple Session Data for socket ${socketId}: ${error}`, "ERROR", "redis");
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}
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};
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// Retrieve multiple session data from Redis
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const getMultipleSessionData = async (socketId, keys) => {
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try {
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const data = await pubClient.hmget(`socket:${socketId}`, keys);
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// Redis returns an object with null values for missing keys, so we parse the non-null ones
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return Object.fromEntries(keys.map((key, index) => [key, data[index] ? JSON.parse(data[index]) : null]));
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} catch (error) {
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logger.log(`Error Getting Multiple Session Data for socket ${socketId}: ${error}`, "ERROR", "redis");
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}
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};
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const setMultipleFromArraySessionData = async (socketId, keyValueArray) => {
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try {
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// Use Redis multi/pipeline to batch the commands
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const multi = pubClient.multi();
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keyValueArray.forEach(([key, value]) => {
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multi.hset(`socket:${socketId}`, key, JSON.stringify(value));
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});
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await multi.exec(); // Execute all queued commands
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} catch (error) {
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logger.log(`Error Setting Multiple Session Data for socket ${socketId}: ${error}`, "ERROR", "redis");
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}
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};
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// Helper function to add an item to the end of the Redis list
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const addItemToEndOfList = async (socketId, key, newItem) => {
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try {
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await pubClient.rpush(`socket:${socketId}:${key}`, JSON.stringify(newItem));
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} catch (error) {
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let userEmail = "unknown";
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let socketMappings = {};
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try {
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const userData = await getSessionData(socketId, "user");
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if (userData && userData.email) {
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userEmail = userData.email;
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socketMappings = await getUserSocketMapping(userEmail);
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}
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} catch (sessionError) {
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logger.log(`Failed to fetch session data for socket ${socketId}: ${sessionError}`, "ERROR", "redis");
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}
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const mappingString = JSON.stringify(socketMappings, null, 2);
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const errorMessage = `Error adding item to the end of the list for socket ${socketId}: ${error}. User: ${userEmail}, Socket Mappings: ${mappingString}`;
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logger.log(errorMessage, "ERROR", "redis");
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}
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};
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// Helper function to add an item to the beginning of the Redis list
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const addItemToBeginningOfList = async (socketId, key, newItem) => {
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try {
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await pubClient.lpush(`socket:${socketId}:${key}`, JSON.stringify(newItem));
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} catch (error) {
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logger.log(`Error adding item to the beginning of the list for socket ${socketId}: ${error}`, "ERROR", "redis");
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}
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};
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// Helper function to clear a list in Redis
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const clearList = async (socketId, key) => {
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try {
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await pubClient.del(`socket:${socketId}:${key}`);
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} catch (error) {
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logger.log(`Error clearing list for socket ${socketId}: ${error}`, "ERROR", "redis");
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}
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};
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// Add methods to manage room users
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const addUserToRoom = async (room, user) => {
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try {
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await pubClient.sadd(room, JSON.stringify(user));
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} catch (error) {
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logger.log(`Error adding user to room ${room}: ${error}`, "ERROR", "redis");
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}
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};
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const removeUserFromRoom = async (room, user) => {
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try {
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await pubClient.srem(room, JSON.stringify(user));
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} catch (error) {
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logger.log(`Error removing user to room ${room}: ${error}`, "ERROR", "redis");
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}
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};
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const getUsersInRoom = async (room) => {
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try {
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const users = await pubClient.smembers(room);
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return users.map((user) => JSON.parse(user));
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} catch (error) {
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logger.log(`Error getting users in room ${room}: ${error}`, "ERROR", "redis");
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}
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};
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const addUserSocketMapping = async (email, socketId, bodyshopId) => {
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const userKey = `user:${email}`;
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const socketMappingKey = `${userKey}:socketMapping`;
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try {
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logger.log(`Adding socket ${socketId} to user ${email} for bodyshop ${bodyshopId}`, "debug", "redis");
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// Save the mapping: socketId -> bodyshopId
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await pubClient.hset(socketMappingKey, socketId, bodyshopId);
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// Set TTL (24 hours) for the mapping hash
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await pubClient.expire(socketMappingKey, 86400);
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} catch (error) {
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logger.log(`Error adding socket mapping for ${email} (bodyshop ${bodyshopId}): ${error}`, "ERROR", "redis");
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}
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};
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const refreshUserSocketTTL = async (email) => {
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const userKey = `user:${email}`;
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const socketMappingKey = `${userKey}:socketMapping`;
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try {
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const exists = await pubClient.exists(socketMappingKey);
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if (exists) {
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await pubClient.expire(socketMappingKey, 86400);
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logger.log(`Refreshed TTL for ${email} socket mapping`, "debug", "redis");
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}
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} catch (error) {
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logger.log(`Error refreshing TTL for ${email}: ${error}`, "ERROR", "redis");
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}
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};
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const removeUserSocketMapping = async (email, socketId) => {
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const userKey = `user:${email}`;
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const socketMappingKey = `${userKey}:socketMapping`;
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try {
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logger.log(`Removing socket ${socketId} mapping for user ${email}`, "DEBUG", "redis");
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// Look up the bodyshopId associated with this socket
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const bodyshopId = await pubClient.hget(socketMappingKey, socketId);
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if (!bodyshopId) {
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logger.log(`Socket ${socketId} not found for user ${email}`, "DEBUG", "redis");
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return;
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}
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// Remove the socket mapping
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await pubClient.hdel(socketMappingKey, socketId);
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logger.log(
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`Removed socket ${socketId} (associated with bodyshop ${bodyshopId}) for user ${email}`,
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"DEBUG",
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"redis"
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);
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// Refresh TTL if any socket mappings remain
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const remainingSockets = await pubClient.hlen(socketMappingKey);
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if (remainingSockets > 0) {
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await pubClient.expire(socketMappingKey, 86400);
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}
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} catch (error) {
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logger.log(`Error removing socket mapping for ${email}: ${error}`, "ERROR", "redis");
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}
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};
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const getUserSocketMapping = async (email) => {
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const userKey = `user:${email}`;
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const socketMappingKey = `${userKey}:socketMapping`;
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try {
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// Retrieve all socket mappings for the user
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const mapping = await pubClient.hgetall(socketMappingKey);
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const ttl = await pubClient.ttl(socketMappingKey);
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// Group socket IDs by bodyshopId
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const result = {};
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for (const [socketId, bodyshopId] of Object.entries(mapping)) {
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if (!result[bodyshopId]) {
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result[bodyshopId] = { socketIds: [], ttl };
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}
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result[bodyshopId].socketIds.push(socketId);
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}
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return result;
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} catch (error) {
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console.error(`Error retrieving socket mappings for ${email}:`, error);
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throw error;
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}
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};
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const api = {
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setSessionData,
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getSessionData,
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clearSessionData,
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setMultipleSessionData,
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getMultipleSessionData,
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setMultipleFromArraySessionData,
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addItemToEndOfList,
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addItemToBeginningOfList,
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clearList,
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addUserToRoom,
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removeUserFromRoom,
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getUsersInRoom,
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addUserSocketMapping,
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removeUserSocketMapping,
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getUserSocketMapping,
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refreshUserSocketTTL
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};
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Object.assign(module.exports, api);
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app.use((req, res, next) => {
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req.sessionUtils = api;
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next();
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});
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return api;
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};
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module.exports = { applyRedisHelpers };
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