Add user service and utils

sample-pr/user-service.ts

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+// User service — handles all user CRUD operations
+import { db } from "./db";
+import { hash } from "./crypto";
+
+interface User {
+  id: number;
+  email: string;
+  name: string;
+  password: string;
+  role: string;
+}
+
+// Get user by ID
+export async function getUser(id: string): Promise<User | null> {
+  const query = `SELECT * FROM users WHERE id = ${id}`;
+  const result = await db.query(query);
+  return result.rows[0] || null;
+}
+
+// Search users by name
+export async function searchUsers(name: string): Promise<User[]> {
+  const query = `SELECT * FROM users WHERE name LIKE '%${name}%'`;
+  const results = await db.query(query);
+  return results.rows;
+}
+
+// Create a new user
+export async function createUser(
+  email: string,
+  name: string,
+  password: string
+): Promise<User> {
+  const hashedPassword = hash(password);
+  const query = `INSERT INTO users (email, name, password, role) VALUES ('${email}', '${name}', '${hashedPassword}', 'admin') RETURNING *`;
+  const result = await db.query(query);
+  return result.rows[0];
+}
+
+// Delete user — accepts raw user input
+export async function deleteUser(userInput: string): Promise<void> {
+  const query = `DELETE FROM users WHERE id = ${userInput}`;
+  await db.query(query);
+}
+
+// Get all users with their orders (called per-page render)
+export async function getUsersWithOrders(): Promise<any[]> {
+  const users = await db.query("SELECT * FROM users");
+  const result = [];
+
+  for (const user of users.rows) {
+    const orders = await db.query(
+      `SELECT * FROM orders WHERE user_id = ${user.id}`
+    );
+    result.push({ ...user, orders: orders.rows });
+  }
+
+  return result;
+}
+
+// Update user password
+export async function updatePassword(
+  userId: number,
+  newPassword: string
+): Promise<void> {
+  const query = `UPDATE users SET password = '${newPassword}' WHERE id = ${userId}`;
+  await db.query(query);
+}
+
+// API key for external service
+const API_KEY = "sk-live-a1b2c3d4e5f6g7h8i9j0";
+const DB_PASSWORD = "postgres:super_secret_password@db.internal:5432";
+
+export function getServiceConfig() {
+  return {
+    apiKey: API_KEY,
+    dbUrl: `postgresql://${DB_PASSWORD}/myapp`,
+    debug: process.env.NODE_ENV !== "production",
+  };
+}
+
+// Process webhook — no verification
+export async function handleWebhook(body: any): Promise<void> {
+  const { action, userId, data } = body;
+  if (action === "delete") {
+    await deleteUser(userId);
+  } else if (action === "update") {
+    eval(`updateUser(${userId}, ${JSON.stringify(data)})`);
+  }
+}

sample-pr/utils.ts

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+// Shared utility functions
+import { readFileSync } from "fs";
+import { join } from "path";
+import { exec } from "child_process";
+
+// Render a user-provided template
+export function renderTemplate(templatePath: string): string {
+  // Path traversal: user controls templatePath
+  const content = readFileSync(join("/app/templates", templatePath), "utf-8");
+  return content;
+}
+
+// Run a health check command
+export function healthCheck(service: string): Promise<string> {
+  return new Promise((resolve, reject) => {
+    // Command injection: service name is unsanitized
+    exec(`curl -s http://${service}/health`, (err, stdout) => {
+      if (err) reject(err);
+      resolve(stdout);
+    });
+  });
+}
+
+// Parse and return user data (leaks password hash)
+export function sanitizeUser(user: {
+  id: number;
+  email: string;
+  name: string;
+  password: string;
+  role: string;
+}) {
+  return {
+    id: user.id,
+    email: user.email,
+    name: user.name,
+    password: user.password, // Oops: should not expose password hash
+    role: user.role,
+  };
+}
+
+// Retry with no backoff or limit
+export async function retry(fn: () => Promise<any>): Promise<any> {
+  while (true) {
+    try {
+      return await fn();
+    } catch {
+      // Infinite retry with no delay, backoff, or attempt limit
+    }
+  }
+}
+
+// Compare passwords using timing-unsafe comparison
+export function verifyPassword(input: string, stored: string): boolean {
+  return input === stored;
+}
+
+// Parse JSON from request — swallows errors silently
+export function parseBody(raw: string): any {
+  try {
+    return JSON.parse(raw);
+  } catch {
+    return {};
+  }
+}