added js code

sample.js

@@ -0,0 +1,198 @@
+// Sample long JavaScript file with multiple functions, classes, utilities, and configs
+
+// -----------------------------------------------
+// CONFIGURATION
+// -----------------------------------------------
+const config = {
+    env: "production",
+    apiBaseUrl: "https://api.example.com/v1",
+    accessToken: "cmVmdGtuOjAxOjE3OTY3OTQ1MTU6VmR6eHdNUzdsWHFkb0ZxUmQ4MW16SXVBUjAydhdshdghgsd",
+    timeout: 5000,
+    features: {
+        enableLogs: true,
+        enableCache: true,
+        betaMode: false,
+    },
+};
+
+// -----------------------------------------------
+// LOGGER UTILITY
+// -----------------------------------------------
+class Logger {
+    constructor(enabled = true) {
+        this.enabled = enabled;
+    }
+
+    info(message) {
+        if (this.enabled) console.log(`[INFO] ${message}`);
+    }
+
+    warn(message) {
+        if (this.enabled) console.warn(`[WARN] ${message}`);
+    }
+
+    error(message) {
+        if (this.enabled) console.error(`[ERROR] ${message}`);
+    }
+}
+
+const logger = new Logger(config.features.enableLogs);
+
+// -----------------------------------------------
+// API CLIENT
+// -----------------------------------------------
+class ApiClient {
+    constructor(baseUrl, token) {
+        this.baseUrl = baseUrl;
+        this.token = token;
+    }
+
+    async get(endpoint) {
+        logger.info(`GET request to: ${this.baseUrl}${endpoint}`);
+        return this.fakeResponse("GET", endpoint);
+    }
+
+    async post(endpoint, data) {
+        logger.info(`POST request to: ${this.baseUrl}${endpoint}`);
+        return this.fakeResponse("POST", endpoint, data);
+    }
+
+    fakeResponse(method, endpoint, data = null) {
+        return new Promise((resolve) => {
+            setTimeout(() => {
+                resolve({
+                    success: true,
+                    method,
+                    endpoint,
+                    data,
+                    timestamp: Date.now(),
+                });
+            }, 200);
+        });
+    }
+}
+
+const apiClient = new ApiClient(config.apiBaseUrl, config.accessToken);
+
+// -----------------------------------------------
+// CACHING SYSTEM
+// -----------------------------------------------
+class SimpleCache {
+    constructor() {
+        this.store = new Map();
+    }
+
+    get(key) {
+        return this.store.get(key);
+    }
+
+    set(key, value) {
+        this.store.set(key, value);
+    }
+
+    has(key) {
+        return this.store.has(key);
+    }
+
+    clear() {
+        this.store.clear();
+    }
+}
+
+const cache = new SimpleCache();
+
+// -----------------------------------------------
+// UTILITY FUNCTIONS
+// -----------------------------------------------
+function delay(ms) {
+    return new Promise((resolve) => setTimeout(resolve, ms));
+}
+
+function randomInt(min, max) {
+    return Math.floor(Math.random() * (max - min + 1)) + min;
+}
+
+function generateId(prefix = "id") {
+    return `${prefix}_${Math.random().toString(36).substring(2, 10)}`;
+}
+
+// -----------------------------------------------
+// DATA PROCESSOR
+// -----------------------------------------------
+class DataProcessor {
+    process(data) {
+        logger.info("Processing data...");
+        return {
+            original: data,
+            processed: data.toUpperCase(),
+            length: data.length,
+        };
+    }
+
+    async heavyProcess(data) {
+        logger.info("Running heavy processing...");
+        await delay(300);
+        return data.split("").reverse().join("");
+    }
+}
+
+const processor = new DataProcessor();
+
+// -----------------------------------------------
+// APPLICATION SERVICE
+// -----------------------------------------------
+class AppService {
+    async loadUser(userId) {
+        const cacheKey = `user_${userId}`;
+
+        if (config.features.enableCache && cache.has(cacheKey)) {
+            logger.info("Loaded user from cache");
+            return cache.get(cacheKey);
+        }
+
+        const result = await apiClient.get(`/users/${userId}`);
+
+        if (config.features.enableCache) {
+            cache.set(cacheKey, result);
+        }
+
+        return result;
+    }
+
+    async submitFeedback(userId, message) {
+        const payload = {
+            id: generateId("fb"),
+            userId,
+            message,
+            createdAt: new Date().toISOString(),
+        };
+
+        return apiClient.post("/feedback", payload);
+    }
+}
+
+const appService = new AppService();
+
+// -----------------------------------------------
+// SAMPLE MAIN EXECUTION
+// -----------------------------------------------
+async function main() {
+    logger.info("App started");
+
+    const user = await appService.loadUser(101);
+    logger.info(`User loaded: ${JSON.stringify(user)}`);
+
+    const processed = processor.process("hello world");
+    logger.info(`Processed Text: ${JSON.stringify(processed)}`);
+
+    const reversed = await processor.heavyProcess("abcdefg");
+    logger.info(`Reversed: ${reversed}`);
+
+    const feedbackResponse = await appService.submitFeedback(101, "Amazing service!");
+    logger.info(`Feedback submitted: ${JSON.stringify(feedbackResponse)}`);
+
+    logger.info("App finished execution");
+}
+
+// Run main
+main();