added endpoints for profile and feed

code/backend/package.json

@@ -20,7 +20,6 @@
   },
   "devDependencies": {
     "@prisma/client": "^6.9.0",
-    "@types/bcryptjs": "^3.0.0",
     "@types/cors": "^2.8.19",
     "@types/express": "^5.0.1",
     "@types/jsonwebtoken": "^9.0.9",

code/backend/prisma/schema.prisma

@@ -89,7 +89,7 @@ model Comment {
 }
 
 model Like {
-   id              String    @id @default(uuid())
+   @@id([postId, userId])
   createdAt DateTime @default(now())
 
   post      Post     @relation(fields: [postId], references: [id])

code/backend/src/controllers/feedController.ts

@@ -0,0 +1,31 @@
+import express, { Request, Response } from "express";
+import { StatusCodes } from "http-status-codes";
+import { PrismaClient, Post } from "../../prisma/app/generated/prisma/client";
+import { feedQuerySchema } from "../schemas/feedSchemas";
+const prisma = new PrismaClient();
+export const feed = async (req: Request, res: Response) => {
+  try {
+    const query = feedQuerySchema.parse(req.query);
+    const take = query.limit || 10;
+
+    const posts = await prisma.post.findMany({
+      take: take + 1,
+      where: {
+        status: "PUBLIC",
+        ...(query.createdAt && { createdAt: { lt: query.createdAt } }),
+      },
+      orderBy: { createdAt: "desc" },
+      select: { id: true, createdAt: true, description: true },
+    });
+
+    const hasMore = posts.length > take;
+    if (hasMore) posts.pop();
+
+    const nextCursor = hasMore ? posts[posts.length - 1].createdAt : null;
+
+    res.status(200).json({ posts, nextCursor });
+  } catch (err) {
+    console.error(err);
+    res.status(400).json({ error: "Invalid query parameters" });
+  }
+};

code/backend/src/controllers/followerController.ts

@@ -0,0 +1,124 @@
+import { StatusCodes } from "http-status-codes";
+import express, { Request, Response } from "express";
+import { JwtPayload } from "jsonwebtoken";
+import { PrismaClient, Follow } from "../../prisma/app/generated/prisma/client";
+const prisma = new PrismaClient();
+export const followUser = async (req: Request, res: Response) => {
+  const username: string = req.params.username;
+  const followingUser: JwtPayload = req.user!;
+  if (!username) {
+    res.status(StatusCodes.BAD_REQUEST).json({
+      error: "no username",
+      details: [{ message: "Username is required" }],
+    });
+    return;
+  }
+  try {
+    const user = await prisma.user.findUnique({
+      where: { username },
+    });
+
+    if (!user) {
+      res.status(StatusCodes.NOT_FOUND).json({
+        error: "User not found",
+        details: [
+          { message: `User with username '${username}' does not exist.` },
+        ],
+      });
+      return;
+    }
+    if (user.username == username) {
+      res.status(StatusCodes.BAD_REQUEST).json({
+        error: "Bad Request",
+        details: [{ message: "You can`t follow yourself" }],
+      });
+      return;
+    }
+    const alreadyFollowing = await prisma.follow.findUnique({
+      where: {
+        followingUserId_followedUserId: {
+          followingUserId: followingUser.sub!,
+          followedUserId: user.id,
+        },
+      },
+    });
+    if (alreadyFollowing) {
+      res.status(StatusCodes.CONFLICT).json({
+        error: "Already following",
+        details: [{ message: "You are already following this User" }],
+      });
+      return;
+    }
+    const follow = await prisma.follow.create({
+      data: {
+        followingUserId: followingUser.sub!,
+        followedUserId: user.id,
+      },
+    });
+    res.status(StatusCodes.NO_CONTENT).send();
+    return;
+  } catch (err) {
+    console.error(err);
+    res.status(StatusCodes.INTERNAL_SERVER_ERROR).json({
+      error: "Upload failed",
+      details: [{ message: "Internal server error" }],
+    });
+  }
+};
+export const unfollowUser = async (req: Request, res: Response) => {
+  const username: string = req.params.username;
+  const followingUser: JwtPayload = req.user!;
+  if (!username) {
+    res.status(StatusCodes.BAD_REQUEST).json({
+      error: "no username",
+      details: [{ message: "Username is required" }],
+    });
+    return;
+  }
+  try {
+    const user = await prisma.user.findUnique({
+      where: { username },
+    });
+
+    if (!user) {
+      res.status(StatusCodes.NOT_FOUND).json({
+        error: "User not found",
+        details: [
+          { message: `User with username '${username}' does not exist.` },
+        ],
+      });
+      return;
+    }
+    const alreadyFollowing = await prisma.follow.findUnique({
+      where: {
+        followingUserId_followedUserId: {
+          followingUserId: followingUser.sub!,
+          followedUserId: user.id,
+        },
+      },
+    });
+    if (!alreadyFollowing) {
+      res.status(StatusCodes.CONFLICT).json({
+        error: "Not following",
+        details: [{ message: "You are not following this User" }],
+      });
+      return;
+    }
+    const follow = await prisma.follow.delete({
+      where: {
+        followingUserId_followedUserId: {
+          followingUserId: followingUser.sub!,
+          followedUserId: user.id,
+        },
+      },
+    });
+    res.status(StatusCodes.NO_CONTENT).send();
+    return;
+  } catch (err) {
+    console.error(err);
+    res.status(StatusCodes.INTERNAL_SERVER_ERROR).json({
+      error: "Upload failed",
+      details: [{ message: "Internal server error" }],
+    });
+  }
+};

code/backend/src/controllers/postController.ts

@@ -17,12 +17,12 @@ export const uploadPost = async (req: Request, res: Response) => {
   try {
     const uploads = await Promise.all(
       files.map(async (file) => {
-        const objectName = `${user.sub}/${Date.now()}-${file.originalname}`;
+        const objectName = `${user.sub}/posts/${Date.now()}-${file.originalname}`;
         await minioClient.putObject(BUCKET, objectName, file.buffer);
         const url = await minioClient.presignedGetObject(
           BUCKET,
           objectName,
-          60 * 5 // 5 Minuten Gültigkeit
+          60 * 10
         );
 
         return {
@@ -76,10 +76,19 @@ export const getPost = async (req: Request, res: Response) => {
   try {
     // get the postId from the request
     const postId: string = req.query.postId as string;
-    const postObject = await prisma.post.findUnique({
+    const user: JwtPayload | undefined = req.user;
+    const postObject = await prisma.post.findFirst({
       // find the post by id
       where: {
         id: postId,
+        ...(user
+          ? {
+              OR: [
+                { status: "PRIVATE", userId: user.id },
+                { status: "PUBLIC" },
+              ],
+            }
+          : { status: "PUBLIC" }),
       },
       include: {
         user: true,
@@ -107,6 +116,20 @@ export const getPost = async (req: Request, res: Response) => {
       });
       return;
     }
+    let isFollowing = false;
+    if (user) {
+      const following = await prisma.follow.findUnique({
+        where: {
+          followingUserId_followedUserId: {
+            followingUserId: user.sub!,
+            followedUserId: postObject.userId,
+          },
+        },
+      });
+      if (following) {
+        isFollowing = true;
+      }
+    }
     const images = await Promise.all(
       // generate the presigned url for each image
       postObject?.media.map(async (image) => {
@@ -139,7 +162,9 @@ export const getPost = async (req: Request, res: Response) => {
       createdAt: postObject.createdAt,
       updatedAt: postObject.updatedAt,
       images: images.filter((image) => image !== null), // filter out the null images
+      following: isFollowing,
     });
+    return;
   } catch (err: any) {
     if (err.code === "NotFound") {
       // Handle the case where the object does not exist
@@ -151,22 +176,26 @@ export const getPost = async (req: Request, res: Response) => {
           },
         ],
       });
+      return;
     }
     console.error(err);
     res.status(StatusCodes.INTERNAL_SERVER_ERROR).json({
       error: "Failed to retrieve post",
       details: [{ message: "Server error" }],
     });
+    return;
   }
 };
 
 // get all posts from a user
 export const getUserPosts = async (req: Request, res: Response) => {
   try {
-    const userId: string = req.query.userId as string; // Get the userId from the request
+    const username: string = req.params.username;
     const posts = await prisma.post.findMany({
       where: {
-        userId: userId,
+        user: {
+          username: username, // hier greifst du auf die relationierte User-Tabelle zu
+        },
       },
     });
     if (!posts || posts.length === 0) {
@@ -192,3 +221,111 @@ export const getUserPosts = async (req: Request, res: Response) => {
     return;
   }
 };
+export const like = async (req: Request, res: Response) => {
+  const postId: string = req.params.postId;
+  const user: JwtPayload = req.user!;
+  if (!postId) {
+    res.status(StatusCodes.BAD_REQUEST).json({
+      error: "no username",
+      details: [{ message: "Username is required" }],
+    });
+    return;
+  }
+  try {
+    const post = await prisma.post.findUnique({
+      where: { id: postId },
+    });
+
+    if (!post) {
+      res.status(StatusCodes.NOT_FOUND).json({
+        error: "Post not found",
+        details: [{ message: `Post with PostId '${postId}' does not exist.` }],
+      });
+      return;
+    }
+    const alreadyLiked = await prisma.like.findUnique({
+      where: {
+        postId_userId: {
+          postId: postId,
+          userId: user.sub!,
+        },
+      },
+    });
+    if (alreadyLiked) {
+      res.status(StatusCodes.CONFLICT).json({
+        error: "Already following",
+        details: [{ message: "You are already following this User" }],
+      });
+      return;
+    }
+    const follow = await prisma.like.create({
+      data: {
+        postId: postId,
+        userId: user.sub!,
+      },
+    });
+    res.status(StatusCodes.NO_CONTENT).send();
+    return;
+  } catch (err) {
+    console.error(err);
+    res.status(StatusCodes.INTERNAL_SERVER_ERROR).json({
+      error: "Upload failed",
+      details: [{ message: "Internal server error" }],
+    });
+  }
+};
+export const removeLike = async (req: Request, res: Response) => {
+  const postId: string = req.params.postId;
+  const user: JwtPayload = req.user!;
+  if (!postId) {
+    res.status(StatusCodes.BAD_REQUEST).json({
+      error: "no postId",
+      details: [{ message: "postId is required" }],
+    });
+    return;
+  }
+  try {
+    const post = await prisma.post.findUnique({
+      where: { id: postId },
+    });
+
+    if (!post) {
+      res.status(StatusCodes.NOT_FOUND).json({
+        error: "Post not found",
+        details: [{ message: `Post with PostId '${postId}' does not exist.` }],
+      });
+      return;
+    }
+    const alreadyLiked = await prisma.like.findUnique({
+      where: {
+        postId_userId: {
+          postId: postId!,
+          userId: user.sub!,
+        },
+      },
+    });
+    if (!alreadyLiked) {
+      res.status(StatusCodes.CONFLICT).json({
+        error: "Already following",
+        details: [{ message: "You are already following this User" }],
+      });
+      return;
+    }
+    const follow = await prisma.like.delete({
+      where: {
+        postId_userId: {
+          postId: postId,
+          userId: user.sub!,
+        },
+      },
+    });
+    res.status(StatusCodes.NO_CONTENT).send();
+    return;
+  } catch (err) {
+    console.error(err);
+    res.status(StatusCodes.INTERNAL_SERVER_ERROR).json({
+      error: "Upload failed",
+      details: [{ message: "Internal server error" }],
+    });
+  }
+};

code/backend/src/controllers/profileController.ts

@@ -0,0 +1,235 @@
+import express, { Request, Response } from "express";
+import { JwtPayload } from "jsonwebtoken";
+import { PrismaClient } from "../../prisma/app/generated/prisma/client";
+import dotenv from "dotenv";
+import { StatusCodes } from "http-status-codes";
+import multer from "multer";
+import { minioClient } from "../server";
+
+const app = express();
+app.use(express.json());
+const prisma = new PrismaClient();
+// load environment variables from .env file
+dotenv.config();
+
+type PublicUser = {
+  id: string;
+  username: string;
+  bio: string | null;
+  profilePictureUrl: string | null;
+  followers: number;
+  following: number;
+};
+const getUser: (userId: string) => Promise<PublicUser | undefined> = async (
+  userId: string
+) => {
+  const user = await prisma.user.findUnique({
+    where: { id: userId },
+    include: { profilePicture: true },
+  });
+  if (user) {
+    let profilePictureUrl: string | null = null;
+    if (user.profilePicture) {
+      profilePictureUrl = await minioClient.presignedGetObject(
+        user.profilePicture.bucket,
+        user.profilePicture.objectName,
+        60 * 10
+      );
+    }
+    const followerCount = await prisma.follow.count({
+      where: {
+        followedUserId: userId,
+      },
+    });
+
+    const followingCount = await prisma.follow.count({
+      where: {
+        followingUserId: userId,
+      },
+    });
+    const publicUser: PublicUser = {
+      id: user.id,
+      username: user.username,
+      bio: user.bio,
+      profilePictureUrl,
+      followers: followerCount,
+      following: followingCount,
+    };
+    return publicUser;
+  }
+  return undefined;
+};
+
+export const uploadProfilePicture = async (req: Request, res: Response) => {
+  const user: JwtPayload = req.user!;
+  const file = req.file as Express.Multer.File;
+  const BUCKET = "images"; // Name of the bucket where the images are stored
+  try {
+    const objectName = `${user.sub}/profile.${file.mimetype.split("/")[1]}`;
+    await minioClient.putObject(BUCKET, objectName, file.buffer);
+    const url = await minioClient.presignedGetObject(
+      BUCKET,
+      objectName,
+      60 * 10
+    );
+    const oldImage = await prisma.user.findUnique({
+      where: { id: user.sub },
+      select: { profilePictureId: true },
+    });
+
+    const media = await prisma.media.create({
+      data: {
+        originalFilename: file.originalname,
+        objectName: objectName,
+        mimeType: file.mimetype,
+        size: file.size,
+        bucket: BUCKET,
+        uploader: { connect: { id: user.sub } },
+      },
+    });
+
+    await prisma.user.update({
+      where: { id: user.sub },
+      data: {
+        profilePicture: {
+          connect: { id: media.id },
+        },
+      },
+    });
+
+    if (oldImage?.profilePictureId && oldImage.profilePictureId !== media.id) {
+      await prisma.media.delete({
+        where: { id: oldImage.profilePictureId },
+      });
+    }
+
+    res.status(StatusCodes.CREATED).json({
+      originalName: file.originalname,
+      objectName: objectName,
+      size: file.size,
+      mimetype: file.mimetype,
+      url: url,
+    });
+  } catch (err) {
+    console.error(err);
+    res.status(StatusCodes.INTERNAL_SERVER_ERROR).json({
+      error: "Upload failed",
+      details: [{ message: "Internal server error" }],
+    });
+  }
+};
+
+export const getProfilePicture = async (req: Request, res: Response) => {
+  const username: string = req.params.username;
+  if (!username) {
+    res.status(StatusCodes.BAD_REQUEST).json({
+      error: "no username",
+      details: [{ message: "Username is required" }],
+    });
+    return;
+  }
+  try {
+    const user = await prisma.user.findUnique({
+      where: { username },
+      include: { profilePicture: true },
+    });
+
+    if (!user) {
+      res.status(StatusCodes.NOT_FOUND).json({
+        error: "User not found",
+        details: [
+          { message: `User with username '${username}' does not exist.` },
+        ],
+      });
+      return;
+    }
+
+    if (!user.profilePicture) {
+      res.status(StatusCodes.NOT_FOUND).json({
+        error: "No profile picture",
+        details: [{ message: "This user does not have a profile picture." }],
+      });
+      return;
+    }
+
+    const profilePictureUrl = await minioClient.presignedGetObject(
+      user.profilePicture.bucket,
+      user.profilePicture.objectName,
+      60 * 10 // 10 minutes expiration
+    );
+
+    res.status(StatusCodes.OK).json({ url: profilePictureUrl });
+  } catch (err) {
+    console.error(err);
+    res.status(StatusCodes.INTERNAL_SERVER_ERROR).json({
+      error: "Retrieving image failed",
+      details: ["Internal server error"],
+    });
+    return;
+  }
+};
+
+export const updateBio = async (req: Request, res: Response) => {
+  const user: JwtPayload = req.user!;
+  const bio: string = req.body.bio;
+  try {
+    const updatedUser = await prisma.user.update({
+      where: { id: user.sub },
+      data: {
+        bio: bio,
+      },
+    });
+    const publicUser: PublicUser | undefined = await getUser(user.sub!);
+    res.status(StatusCodes.OK).json({
+      message: "User found",
+      data: publicUser,
+    });
+  } catch (err) {
+    console.error(err);
+    res.status(StatusCodes.INTERNAL_SERVER_ERROR).json({
+      error: "Updating bio failed",
+      details: [{ message: "Internal Server error" }],
+    });
+  }
+};
+// Endpoint to get user data
+export const getProfile = async (req: Request, res: Response) => {
+  const username: string = req.params.username as string;
+  if (!username) {
+    res.status(StatusCodes.BAD_REQUEST).json({
+      error: "no username",
+      details: [{ message: "Username is required" }],
+    });
+    return;
+  }
+  try {
+    const user = await prisma.user.findUnique({
+      where: { username },
+      include: { profilePicture: true },
+    });
+
+    if (!user) {
+      res.status(StatusCodes.NOT_FOUND).json({
+        error: "User not found",
+        details: [
+          { message: `User with username '${username}' does not exist.` },
+        ],
+      });
+      return;
+    }
+
+    const publicUser: PublicUser | undefined = await getUser(user.id);
+
+    res.status(StatusCodes.OK).json({
+      message: "User found",
+      data: publicUser,
+    });
+  } catch (err) {
+    console.error(err);
+    res.status(StatusCodes.INTERNAL_SERVER_ERROR).json({
+      error: "Retrieving image failed",
+      details: ["Error while retrieving the image"],
+    });
+    return;
+  }
+};

code/backend/src/controllers/userController.ts

@@ -171,37 +171,6 @@ export const loginUser = async (req: Request, res: Response) => {
   res.status(StatusCodes.OK).json({ message: "User logged in successfully" });
 };
 
-// Endpoint to get user data
-export const getUser = async (req: Request, res: Response) => {
-  const username: string = req.params.username as string;
-  if (!username) {
-    res.status(StatusCodes.BAD_REQUEST).json({
-      error: "no username",
-      details: [{ message: "Username is required" }],
-    });
-    return;
-  }
-  const user: User | null = await prisma.user.findUnique({
-    where: {
-      username: username,
-    },
-  });
-  if (!user) {
-    res.status(StatusCodes.NOT_FOUND).json({
-      error: "user not found",
-      details: [{ message: `User "${username}" not found` }],
-    });
-    return;
-  }
-  res.json({
-    message: "User found",
-    data: {
-      username: user.username,
-      userId: user.id,
-      bio: user.bio,
-    },
-  });
-};
 export const refreshToken = async (req: Request, res: Response) => {
   const refreshToken: string | undefined = req.headers[
     "refresh-token"

code/backend/src/middleware/authenticateToken.ts

@@ -9,17 +9,6 @@ dotenv.config();
 const JWT_SECRET: string = process.env.TOKEN_SECRET!;
 if (!JWT_SECRET) console.error("No JWT secret provided");
 
-
-
-// Extend the Express Request interface to include the user property
-declare global {
-  namespace Express {
-    interface Request {
-      user?: JwtPayload;
-    }
-  }
-}
-
 // Middleware function to authenticate the JWT token
 export function authenticateToken() {
   return (req: Request, res: Response, next: NextFunction) => {

code/backend/src/middleware/optionalAuthenticateToken.ts

@@ -0,0 +1,25 @@
+import { Request, Response, NextFunction } from "express";
+import jwt from "jsonwebtoken";
+import { JwtPayload } from "../types/tokens";
+const JWT_SECRET: string = process.env.TOKEN_SECRET!;
+
+export const optionalAuthenticateToken = (
+  req: Request,
+  res: Response,
+  next: NextFunction
+) => {
+  const authHeader = req.headers["authorization"]; // Get the authorization header
+  const token = authHeader && authHeader.split(" ")[1]; // Extract the token from the "Bearer <token>" format
+
+  if (!token) {
+    return next();
+  }
+
+  jwt.verify(token!, JWT_SECRET, (err, user) => {
+    if (err) {
+      return next();
+    }
+    req.user = user as JwtPayload;
+    next();
+  });
+};

code/backend/src/middleware/uploadMultiple.ts

@@ -1,5 +1,5 @@
 import { StatusCodes } from "http-status-codes";
-import multer, { MulterError } from "multer";
+import multer from "multer";
 import { Request, Response, NextFunction } from "express";
 
 // Configure multer to store files in memory
@@ -35,11 +35,7 @@ export const upload = (req: Request, res: Response, next: NextFunction) => {
     }
     for (const file of files) {
       //check for correct filetypes
-      if (
-        file.mimetype !== "image/jpeg" &&
-        file.mimetype !== "image/png" &&
-        file.mimetype !== "image/webp"
-      ) {
+      if (["jpeg", "png", "webp"].includes(file.mimetype)) {
         return res.status(StatusCodes.BAD_REQUEST).json({
           error: "Invalid file type",
           details: [

code/backend/src/middleware/uploadSingle.ts

@@ -0,0 +1,42 @@
+import { Request, Response, NextFunction } from "express";
+import multer from "multer";
+import { StatusCodes } from "http-status-codes";
+
+const multerInstance = multer({
+  storage: multer.memoryStorage(),
+  limits: { fileSize: 5 * 1024 * 1024 }, // 5 MB
+});
+
+export const upload = (req: Request, res: Response, next: NextFunction) => {
+  multerInstance.single("image")(req, res, (err: any) => {
+    if (err) {
+      console.error(err);
+      return res
+        .status(StatusCodes.BAD_REQUEST)
+        .json({ error: err.name, details: [err.message] });
+    }
+
+    if (!req.file) {
+      return res.status(StatusCodes.BAD_REQUEST).json({
+        error: "No file uploaded",
+        details: [{ message: "Please upload a file" }],
+      });
+    }
+
+    const allowedTypes = ["image/jpeg", "image/png", "image/webp"];
+    if (!allowedTypes.includes(req.file.mimetype)) {
+      return res.status(StatusCodes.BAD_REQUEST).json({
+        error: "Invalid file type",
+        details: [
+          {
+            message:
+              "Only .jpeg, .png, or .webp files are allowed. Invalid: " +
+              req.file.originalname,
+          },
+        ],
+      });
+    }
+
+    next();
+  });
+};

code/backend/src/routes/feedRoutes.ts

@@ -0,0 +1,57 @@
+import express from "express";
+import { feed } from "../controllers/feedController";
+const feedRouter = express.Router();
+/**
+ * @swagger
+ * /api/feed:
+ *   get:
+ *     summary: Get a paginated feed of public posts
+ *     description: Returns public posts sorted by creation date descending with cursor pagination.
+ *     tags:
+ *       - Feed
+ *     parameters:
+ *       - in: query
+ *         name: createdAt
+ *         schema:
+ *           type: string
+ *           format: date-time
+ *         required: false
+ *         description: Cursor for pagination, ISO timestamp of last post from previous page (only fetch posts created before this date)
+ *       - in: query
+ *         name: limit
+ *         schema:
+ *           type: integer
+ *           default: 10
+ *         required: false
+ *         description: Number of posts to fetch
+ *     responses:
+ *       200:
+ *         description: List of posts with pagination cursor
+ *         content:
+ *           application/json:
+ *             schema:
+ *               type: object
+ *               properties:
+ *                 posts:
+ *                   type: array
+ *                   items:
+ *                     type: object
+ *                     properties:
+ *                       id:
+ *                         type: string
+ *                         format: uuid
+ *                       createdAt:
+ *                         type: string
+ *                         format: date-time
+ *                       description:
+ *                         type: string
+ *                 nextCursor:
+ *                   type: string
+ *                   format: uuid
+ *                   nullable: true
+ *                   description: Cursor for the next page or null if no more posts
+ *       500:
+ *         description: Server error
+ */
+feedRouter.get("/", feed);
+export default feedRouter;

code/backend/src/routes/followerRoutes.ts

@@ -0,0 +1,50 @@
+import express from "express";
+import { authenticateToken } from "../middleware/authenticateToken";
+import { followUser, unfollowUser } from "../controllers/followerController";
+const followerRouter = express.Router();
+/**
+ * @swagger
+ * /api/follower/follow/{username}:
+ *   post:
+ *     summary: follow a User
+ *     tags: [User]
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: path
+ *         name: username
+ *         required: true
+ *         schema:
+ *           type: string
+ *         description: Der Benutzername, nach dem gesucht werden soll
+ *     responses:
+ *       200:
+ *         description: Login erfolgreich
+ *       401:
+ *         description: Ungültige Anmeldedaten
+ */
+followerRouter.post("/follow/:username", authenticateToken(), followUser);
+
+/**
+ * @swagger
+ * /api/follower/unfollow/{username}:
+ *   delete:
+ *     summary: follow a User
+ *     tags: [User]
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: path
+ *         name: username
+ *         required: true
+ *         schema:
+ *           type: string
+ *         description: Der Benutzername, nach dem gesucht werden soll
+ *     responses:
+ *       200:
+ *         description: Login erfolgreich
+ *       401:
+ *         description: Ungültige Anmeldedaten
+ */
+followerRouter.delete("/unfollow/:username", authenticateToken(), unfollowUser);
+export default followerRouter;

code/backend/src/routes/postRoutes.ts

@@ -2,12 +2,16 @@ import express from "express";
 import {
   getPost,
   getUserPosts,
+  like,
+  removeLike,
   uploadPost as uploadPost,
 } from "../controllers/postController";
-import { upload } from "../middleware/fileUpload";
+import { upload } from "../middleware/uploadMultiple";
 
 import { validateData } from "../middleware/validationMiddleware";
 import { uploadPostSchema } from "../schemas/postSchemas";
+import { authenticateToken } from "../middleware/authenticateToken";
+import { optionalAuthenticateToken } from "../middleware/optionalAuthenticateToken";
 const router = express.Router();
 
 /**
@@ -16,7 +20,7 @@ const router = express.Router();
  *   post:
  *     summary: Upload multiple images with metadata
  *     tags:
- *       - posts
+ *       - Posts
  *     requestBody:
  *       required: true
  *       content:
@@ -57,13 +61,19 @@ const router = express.Router();
  *       200:
  *         description: Images uploaded successfully
  */
-router.post("/upload", upload, validateData(uploadPostSchema), uploadPost);
+router.post(
+  "/upload",
+  authenticateToken(),
+  upload,
+  validateData(uploadPostSchema),
+  uploadPost
+);
 /**
  * @swagger
  * /api/posts/getPost/{postId}:
  *   get:
  *     summary: Get Post
- *     tags: [posts]
+ *     tags: [Posts]
  *     security:
  *       - bearerAuth: []
  *     parameters:
@@ -76,23 +86,74 @@ router.post("/upload", upload, validateData(uploadPostSchema), uploadPost);
  *     responses:
  *       200:
  *         description:  Ok
- *       401:
- *         description: not authenticated
+ *       404:
+ *         description: not found
  */
-router.get("/getPost/:postId", getPost);
+router.get("/getPost/:postId", optionalAuthenticateToken, getPost);
 /**
  * @swagger
- * /api/posts/getUserPosts/:
+ * /api/posts/getUserPosts/{username}:
  *   get:
- *     summary: Get Post
- *     tags: [posts]
- *     security:
- *       - bearerAuth: []
+ *     summary: Get Posts from user
+ *     tags: [Posts]
+ *     parameters:
+ *       - in: path
+ *         name: username
+ *         required: true
+ *         schema:
+ *           type: string
+ *         description: Der Benutzername, nach dem gesucht werden soll
  *     responses:
  *       200:
  *         description:  Ok
- *       401:
- *         description: not authenticated
+ *       404:
+ *         description: not found
  */
-router.get("/getuserposts/", getUserPosts);
+router.get("/getuserposts/:username", optionalAuthenticateToken, getUserPosts);
+/**
+ * @swagger
+ * /api/posts/like/{postId}:
+ *   post:
+ *     summary: follow a User
+ *     tags: [Posts]
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: path
+ *         name: postId
+ *         required: true
+ *         schema:
+ *           type: string
+ *         description: Der Benutzername, nach dem gesucht werden soll
+ *     responses:
+ *       200:
+ *         description: Login erfolgreich
+ *       401:
+ *         description: Ungültige Anmeldedaten
+ */
+router.post("/like/:postId", authenticateToken(), like);
+
+/**
+ * @swagger
+ * /api/posts/removeLike/{postId}:
+ *   delete:
+ *     summary: follow a User
+ *     tags: [Posts]
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: path
+ *         name: postId
+ *         required: true
+ *         schema:
+ *           type: string
+ *         description: Der Benutzername, nach dem gesucht werden soll
+ *     responses:
+ *       200:
+ *         description: Login erfolgreich
+ *       401:
+ *         description: Ungültige Anmeldedaten
+ */
+router.delete("/removeLike/:postId", authenticateToken(), removeLike);
+
 export default router;

code/backend/src/routes/profileRoutes.ts

@@ -0,0 +1,128 @@
+import express from "express";
+import { authenticateToken } from "../middleware/authenticateToken";
+import {
+  getProfile,
+  getProfilePicture,
+  updateBio,
+  uploadProfilePicture,
+} from "../controllers/profileController";
+const profileRouter = express.Router();
+import { upload } from "../middleware/uploadSingle";
+import { updateBioSchema } from "../schemas/feedSchemas";
+import { validateData } from "../middleware/validationMiddleware";
+/**
+ * @swagger
+ * /api/profile/uploadProfilePicture:
+ *   post:
+ *     summary: Upload profile picture
+ *     description: Uploads a profile picture for the current user
+ *     tags:
+ *       - Profile
+ *     security:
+ *       - bearerAuth: []
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         multipart/form-data:
+ *           schema:
+ *             type: object
+ *             properties:
+ *               image:
+ *                 type: string
+ *                 format: binary
+ *                 description: File to upload
+ *     responses:
+ *       201:
+ *         description: Image uploaded successfully
+ *       400:
+ *         description: Invalid file or request
+ *       401:
+ *         description: Unauthorized
+ */
+profileRouter.post(
+  "/uploadProfilePicture",
+  authenticateToken(),
+  upload,
+  uploadProfilePicture
+);
+/**
+ * @swagger
+ * /api/profile/getProfilePicture/{username}:
+ *   get:
+ *     summary: Get Profilepicture
+ *     tags:
+ *       - Profile
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: path
+ *         name: username
+ *         required: true
+ *         schema:
+ *           type: string
+ *         description: Der Benutzername, nach dem gesucht werden soll
+ *     responses:
+ *       200:
+ *         description:  Ok
+ *       401:
+ *         description: not authenticated
+ */
+profileRouter.get("/getProfilePicture/:username", getProfilePicture);
+/**
+ * @swagger
+ * /api/profile/updateBio:
+ *   post:
+ *     summary: Update user bio
+ *     description: Updates the bio (short description) of the currently authenticated user.
+ *     tags:
+ *       - Profile
+ *     security:
+ *       - bearerAuth: []
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         application/json:
+ *           schema:
+ *             type: object
+ *             properties:
+ *               bio:
+ *                 type: string
+ *                 description: New bio text for the user
+ *                 example: "When you program open source, you're programming COMMUNISM☭"
+ *     responses:
+ *       200:
+ *         description: Bio updated successfully
+ *       400:
+ *         description: Invalid request
+ *       401:
+ *         description: Unauthorized
+ */
+profileRouter.post(
+  "/updateBio",
+  authenticateToken(),
+  validateData(updateBioSchema),
+  updateBio
+);
+/**
+ * @swagger
+ * /api/profile/get/{username}:
+ *   get:
+ *     summary: Get user data
+ *     tags: [Profile]
+ *     security:
+ *       - bearerAuth: []
+ *     parameters:
+ *       - in: path
+ *         name: username
+ *         required: true
+ *         schema:
+ *           type: string
+ *         description: Der Benutzername, nach dem gesucht werden soll
+ *     responses:
+ *       200:
+ *         description: Login erfolgreich
+ *       401:
+ *         description: Ungültige Anmeldedaten
+ */
+profileRouter.get("/get/:username", getProfile);
+export default profileRouter;

code/backend/src/routes/userRoutes.ts

@@ -9,11 +9,7 @@ import { authenticateToken } from "../middleware/authenticateToken";
 import { logout, refreshToken } from "../controllers/userController";
 const userRouter = express.Router();
 
-import {
-  registerUser,
-  loginUser,
-  getUser,
-} from "../controllers/userController";
+import { registerUser, loginUser } from "../controllers/userController";
 /**
  * @swagger
  * components:
@@ -87,28 +83,7 @@ userRouter.post(
  *         description: Ungültige Anmeldedaten
  */
 userRouter.post("/login", validateData(userLoginSchema), loginUser);
-/**
- * @swagger
- * /api/user/getUser/{username}:
- *   get:
- *     summary: Get user data
- *     tags: [User]
- *     security:
- *       - bearerAuth: []
- *     parameters:
- *       - in: path
- *         name: username
- *         required: true
- *         schema:
- *           type: string
- *         description: Der Benutzername, nach dem gesucht werden soll
- *     responses:
- *       200:
- *         description: Login erfolgreich
- *       401:
- *         description: Ungültige Anmeldedaten
- */
-userRouter.get("/getUser/:username", authenticateToken(), getUser);
+
 /**
  * @swagger
  * /api/user/refreshToken:
@@ -162,4 +137,5 @@ userRouter.get("/refreshToken", refreshToken);
  *         description: not authenticated
  */
 userRouter.delete("/logout", authenticateToken(), logout);
+
 export default userRouter;

code/backend/src/schemas/feedSchemas.ts

@@ -0,0 +1,15 @@
+import { string, z } from "zod";
+
+export const feedQuerySchema = z.object({
+  createdAt: z.string().datetime().optional(),
+  limit: z
+    .string()
+    .transform((val) => parseInt(val, 10))
+    .refine((num) => num > 0 && num <= 30, {
+      message: "Limit must be between 1 and 30",
+    })
+    .optional(),
+});
+export const updateBioSchema = z.object({
+  bio: z.string(),
+});

code/backend/src/server.ts

@@ -3,7 +3,8 @@ import { Client } from "minio";
 import dotenv from "dotenv";
 import userRouter from "./routes/userRoutes";
 import postRouter from "./routes/postRoutes";
-import { authenticateToken } from "./middleware/authenticateToken";
+import profileRouter from "./routes/profileRoutes";
+import followerRouter from "./routes/followerRoutes";
 import bodyParser from "body-parser";
 import cors from "cors";
 dotenv.config();
@@ -30,6 +31,7 @@ export const minioClient = new Client({
 import swaggerJSDoc from "swagger-jsdoc";
 import swaggerUi from "swagger-ui-express";
 import { deleteExpiredTokens } from "./tasks/deleteTokens";
+import feedRouter from "./routes/feedRoutes";
 
 const options = {
   definition: {
@@ -75,8 +77,10 @@ setInterval(
 );
 app.use(bodyParser.json());
 app.use("/api/user", userRouter);
-app.use("/api/posts", authenticateToken(), postRouter);
-
+app.use("/api/posts", postRouter);
+app.use("/api/profile", profileRouter);
+app.use("/api/feed", feedRouter);
+app.use("/api/follower/", followerRouter);
 app.listen(port, () => {
   console.log(`Server läuft auf http://localhost:${port}`);
 });

code/backend/src/types/express/index.d.ts

@@ -0,0 +1,10 @@
+import { JwtPayload } from "../tokens";
+
+export {};
+declare global {
+  namespace Express {
+    interface Request {
+      user?: JwtPayload;
+    }
+  }
+}

code/backend/tsconfig.json

@@ -7,7 +7,8 @@
     "skipLibCheck": true,
     "forceConsistentCasingInFileNames": true,
     "outDir": "./dist",
-    "resolveJsonModule": true // Allow importing JSON files
+    "typeRoots": ["./src/types", "./node_modules/@types"],
+    "resolveJsonModule": true
   },
   "include": ["src/**/*.ts"],
   "exclude": ["node_modules"]

code/backend/yarn.lock

@@ -137,13 +137,6 @@
   resolved "https://registry.yarnpkg.com/@tsconfig/node16/-/node16-1.0.4.tgz#0b92dcc0cc1c81f6f306a381f28e31b1a56536e9"
   integrity sha512-vxhUy4J8lyeyinH7Azl1pdd43GJhZH/tP2weN8TntQblOY+A0XbT8DJk1/oCPuOOyg/Ja757rG0CgHcWC8OfMA==
 
-"@types/bcryptjs@^3.0.0":
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/@types/bcryptjs/-/bcryptjs-3.0.0.tgz#d7be11653aa82cf17ffee4f3925f1f80cfc1add2"
-  integrity sha512-WRZOuCuaz8UcZZE4R5HXTco2goQSI2XxjGY3hbM/xDvwmqFWd4ivooImsMx65OKM6CtNKbnZ5YL+YwAwK7c1dg==
-  dependencies:
-    bcryptjs "*"
-
 "@types/body-parser@*":
   version "1.19.5"
   resolved "https://registry.yarnpkg.com/@types/body-parser/-/body-parser-1.19.5.tgz#04ce9a3b677dc8bd681a17da1ab9835dc9d3ede4"
@@ -347,7 +340,7 @@ balanced-match@^1.0.0:
   resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-1.0.2.tgz#e83e3a7e3f300b34cb9d87f615fa0cbf357690ee"
   integrity sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==
 
-bcryptjs@*, bcryptjs@^3.0.2:
+bcryptjs@^3.0.2:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/bcryptjs/-/bcryptjs-3.0.2.tgz#caadcca1afefe372ed6e20f86db8e8546361c1ca"
   integrity sha512-k38b3XOZKv60C4E2hVsXTolJWfkGRMbILBIe2IBITXciy5bOsTKot5kDrf3ZfufQtQOUN5mXceUEpU1rTl9Uog==

code/frontend/src/pages/LoginAndSignUpPage.tsx

@@ -31,7 +31,7 @@ function LoginAndSignUpPage({ signupProp }: { signupProp: boolean }) {
   const toggleLogin = (event: React.MouseEvent<HTMLElement>) => {
     event.preventDefault();
     setErrorMessages(undefined);
-    setSignup(!signup);
+    signup ? navigate("/login") : navigate("/register");
   };
   const [formData, setFormData] = useState<FormData>({
     username: "",