feat: Implement user activity logging and upload handling

- Enhanced the proxy function to log user activity for both authenticated and unauthenticated requests, capturing details such as IP address, user agent, and referer.
- Introduced a new utility for logging activities, allowing for structured tracking of user actions across various routes.
- Updated photo upload and guess submission routes to log relevant user activity, improving visibility into user interactions.
- Added a script to watch user activity logs in real-time for easier monitoring.

app/api/photos/[photoId]/guess/route.ts

@@ -2,6 +2,7 @@ import { NextRequest, NextResponse } from "next/server"
 import { auth } from "@/lib/auth"
 import { prisma } from "@/lib/prisma"
 import { normalizeString } from "@/lib/utils"
+import { logActivity } from "@/lib/activity-log"
 
 export async function POST(
   req: NextRequest,
@@ -129,6 +130,21 @@ export async function POST(
       }
     }
 
+    // Log guess activity
+    logActivity(
+      "GUESS_SUBMIT",
+      `/api/photos/${photoId}/guess`,
+      "POST",
+      session.user,
+      {
+        photoId,
+        guessText: guess.guessText.substring(0, 50), // Truncate for privacy
+        correct: isCorrect,
+        pointsChange
+      },
+      req
+    )
+
     return NextResponse.json({ 
       guess, 
       correct: isCorrect,

app/api/photos/upload-multiple/route.ts

@@ -133,7 +133,7 @@ export async function POST(req: NextRequest) {
         const filepath = join(uploadsDir, filename)
         await writeFile(filepath, buffer)
 
-        photoUrl = `/uploads/${filename}`
+        photoUrl = `/api/uploads/${filename}`
       } else if (url) {
         // Handle URL upload
         photoUrl = url

app/api/photos/upload/route.ts

@@ -2,6 +2,7 @@ import { NextRequest, NextResponse } from "next/server"
 import { auth } from "@/lib/auth"
 import { prisma } from "@/lib/prisma"
 import { sendNewPhotoEmail } from "@/lib/email"
+import { logActivity } from "@/lib/activity-log"
 import { writeFile } from "fs/promises"
 import { join } from "path"
 import { existsSync, mkdirSync } from "fs"
@@ -85,14 +86,26 @@ export async function POST(req: NextRequest) {
       const uploadsDir = join(process.cwd(), "public", "uploads")
       if (!existsSync(uploadsDir)) {
         mkdirSync(uploadsDir, { recursive: true })
+        console.log(`[UPLOAD] Created uploads directory: ${uploadsDir}`)
       }
+      console.log(`[UPLOAD] Using uploads directory: ${uploadsDir} (exists: ${existsSync(uploadsDir)})`)
 
       // Filename is generated server-side (timestamp + random), safe for path.join
       const filepath = join(uploadsDir, filename)
       await writeFile(filepath, buffer)
       
-      // Set URL to the uploaded file
-      photoUrl = `/uploads/${filename}`
+      // Verify file was written successfully
+      const { access } = await import("fs/promises")
+      try {
+        await access(filepath)
+        console.log(`[UPLOAD] File saved successfully: ${filepath}`)
+      } catch (error) {
+        console.error(`[UPLOAD] File write verification failed: ${filepath}`, error)
+        throw new Error("Failed to save file to disk")
+      }
+
+      // Set URL to the uploaded file - use API route to ensure it's accessible
+      photoUrl = `/api/uploads/${filename}`
     } else {
       // Handle URL upload (fallback)
       const url = formData.get("url") as string | null
@@ -159,6 +172,21 @@ export async function POST(req: NextRequest) {
       )
     )
 
+    // Log photo upload activity
+    logActivity(
+      "PHOTO_UPLOAD",
+      "/api/photos/upload",
+      "POST",
+      session.user,
+      {
+        photoId: photo.id,
+        answerName: photo.answerName,
+        points: photo.points,
+        filename: photoUrl.split("/").pop()
+      },
+      req
+    )
+
     return NextResponse.json({ photo }, { status: 201 })
   } catch (error) {
     console.error("Error uploading photo:", error)

app/api/uploads/[filename]/route.ts

@@ -0,0 +1,58 @@
+import { NextRequest, NextResponse } from "next/server"
+import { readFile } from "fs/promises"
+import { join } from "path"
+import { existsSync } from "fs"
+
+export async function GET(
+  request: NextRequest,
+  { params }: { params: Promise<{ filename: string }> }
+) {
+  try {
+    const { filename } = await params
+    
+    // Sanitize filename - only allow alphanumeric, dots, hyphens
+    if (!/^[a-zA-Z0-9._-]+$/.test(filename)) {
+      return NextResponse.json({ error: "Invalid filename" }, { status: 400 })
+    }
+    
+    // Get the uploads directory
+    const uploadsDir = join(process.cwd(), "public", "uploads")
+    const filepath = join(uploadsDir, filename)
+    
+    // Security: ensure file is within uploads directory (prevent path traversal)
+    if (!filepath.startsWith(uploadsDir)) {
+      return NextResponse.json({ error: "Invalid path" }, { status: 400 })
+    }
+    
+    // Check if file exists
+    if (!existsSync(filepath)) {
+      console.error(`[UPLOAD] File not found: ${filepath} (cwd: ${process.cwd()})`)
+      return NextResponse.json({ error: "File not found" }, { status: 404 })
+    }
+    
+    // Read and serve the file
+    const fileBuffer = await readFile(filepath)
+    
+    // Determine content type from extension
+    const ext = filename.split(".").pop()?.toLowerCase()
+    const contentType = 
+      ext === "jpg" || ext === "jpeg" ? "image/jpeg" :
+      ext === "png" ? "image/png" :
+      ext === "gif" ? "image/gif" :
+      ext === "webp" ? "image/webp" :
+      "application/octet-stream"
+    
+    return new NextResponse(fileBuffer, {
+      headers: {
+        "Content-Type": contentType,
+        "Cache-Control": "public, max-age=31536000, immutable",
+      },
+    })
+  } catch (error) {
+    console.error("[UPLOAD] Error serving file:", error)
+    return NextResponse.json(
+      { error: "Internal server error" },
+      { status: 500 }
+    )
+  }
+}

lib/activity-log.ts

@@ -0,0 +1,52 @@
+/**
+ * Activity logging utility for tracking user actions
+ */
+
+export interface ActivityLog {
+  timestamp: string
+  userId?: string
+  userEmail?: string
+  userRole?: string
+  action: string
+  path: string
+  method: string
+  ip?: string
+  details?: Record<string, any>
+}
+
+export function logActivity(
+  action: string,
+  path: string,
+  method: string,
+  user?: { id: string; email: string; role: string } | null,
+  details?: Record<string, any>,
+  request?: Request
+) {
+  const timestamp = new Date().toISOString()
+  const ip = request?.headers.get("x-forwarded-for") || 
+             request?.headers.get("x-real-ip") || 
+             "unknown"
+  
+  const log: ActivityLog = {
+    timestamp,
+    userId: user?.id,
+    userEmail: user?.email,
+    userRole: user?.role,
+    action,
+    path,
+    method,
+    ip: ip.split(",")[0].trim(), // Get first IP if multiple
+    details
+  }
+  
+  // Format: [ACTION] timestamp | method path | User: email (role) | IP: ip | Details: {...}
+  const userInfo = user 
+    ? `${user.email} (${user.role})` 
+    : "UNAUTHENTICATED"
+  
+  const detailsStr = details ? ` | Details: ${JSON.stringify(details)}` : ""
+  
+  console.log(`[${action}] ${timestamp} | ${method} ${path} | User: ${userInfo} | IP: ${ip.split(",")[0].trim()}${detailsStr}`)
+  
+  return log
+}

proxy.ts

@@ -19,27 +19,21 @@ export async function proxy(request: NextRequest) {
     cookieName: cookieName
   })
   
-  // Debug logging for production troubleshooting
-  const cookieHeader = request.headers.get("cookie") || ""
-  const hasCookie = cookieHeader.includes(cookieName)
+  // User activity logging - track all page visits and API calls
+  const timestamp = new Date().toISOString()
+  const userAgent = request.headers.get("user-agent") || "unknown"
+  const ip = request.headers.get("x-forwarded-for") || 
+             request.headers.get("x-real-ip") || 
+             "unknown"
+  const referer = request.headers.get("referer") || "direct"
+  const method = request.method
   
-  if (!token) {
-    console.log("Middleware: No token found", {
-      pathname,
-      cookieName,
-      hasCookie,
-      cookieHeader: cookieHeader.substring(0, 300),
-      allCookies: cookieHeader.split(";").map(c => c.trim().substring(0, 50)),
-      origin: request.headers.get("origin"),
-      referer: request.headers.get("referer")
-    })
+  if (token) {
+    // Log authenticated user activity
+    console.log(`[ACTIVITY] ${timestamp} | ${method} ${pathname} | User: ${token.email} (${token.role}) | IP: ${ip} | Referer: ${referer}`)
   } else {
-    console.log("Middleware: Token found", {
-      pathname,
-      tokenId: token.id,
-      tokenRole: token.role,
-      tokenEmail: token.email
-    })
+    // Log unauthenticated access attempts
+    console.log(`[ACTIVITY] ${timestamp} | ${method} ${pathname} | User: UNAUTHENTICATED | IP: ${ip} | Referer: ${referer} | UA: ${userAgent.substring(0, 100)}`)
   }
 
   // Protected routes - require authentication

watch-activity.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+# Watch user activity logs in real-time
+# Usage: ./watch-activity.sh
+
+echo "Watching user activity logs..."
+echo "Press Ctrl+C to stop"
+echo ""
+
+# Watch for activity logs (ACTIVITY, PHOTO_UPLOAD, GUESS_SUBMIT)
+sudo journalctl -u app-backend -f | grep -E "\[ACTIVITY\]|\[PHOTO_UPLOAD\]|\[GUESS_SUBMIT\]"