Added solution

task06/src/main/java/de/hftstuttgart/vs/task06/api/graphql/GraphQLAPI.java

@@ -1,14 +1,23 @@
 package de.hftstuttgart.vs.task06.api.graphql;
 
-import de.hftstuttgart.vs.task06.api.graphql.model.HelloWorldDO;
+import de.hftstuttgart.vs.task06.api.graphql.mapper.CommentMapper;
+import de.hftstuttgart.vs.task06.api.graphql.mapper.PostMapper;
+import de.hftstuttgart.vs.task06.api.graphql.mapper.PostStateMapper;
+import de.hftstuttgart.vs.task06.api.graphql.model.CommentDO;
+import de.hftstuttgart.vs.task06.api.graphql.model.CommentInputDO;
+import de.hftstuttgart.vs.task06.api.graphql.model.PostDO;
+import de.hftstuttgart.vs.task06.api.graphql.model.PostStateDO;
 import de.hftstuttgart.vs.task06.bm.BlogController;
 import jakarta.annotation.Nonnull;
+import org.springframework.graphql.data.method.annotation.MutationMapping;
 import org.springframework.graphql.data.method.annotation.QueryMapping;
 import org.springframework.graphql.data.method.annotation.SchemaMapping;
 import org.springframework.stereotype.Controller;
 
+import java.util.List;
+
 @Controller
-public class GraphQLAPI implements QueryResolver {
+public class GraphQLAPI implements QueryResolver, MutationResolver {
 
     private final BlogController blogController;
 
@@ -19,16 +28,46 @@ public class GraphQLAPI implements QueryResolver {
     @Nonnull
     @Override
     @QueryMapping
-    public HelloWorldDO helloWorld() {
+    public List<PostDO> posts() {
-        return new HelloWorldDO();
+        return blogController.getPosts().stream().map(PostMapper::map).toList();
     }
 
-    @SchemaMapping
+    @Override
-    public String message(final HelloWorldDO helloWorld) {
+    @MutationMapping
-        return "Hello World!";
+    public PostDO addPost(@Nonnull final String text, @Nonnull final String userName) {
+        final var post = blogController.addPost(userName, text);
+        return PostMapper.map(post);
     }
 
-    //TODO 2: Add mappings for queries and mutations defined in your schema
+    @Override
+    @MutationMapping
+    public PostDO editPost(final int postID, @Nonnull final String text) throws Exception {
+        final var post = blogController.editPost(postID, text);
+        return PostMapper.map(post);
+    }
 
-    //TODO 4: Add field mapping for count of comments for a post
+    @Override
+    @MutationMapping
+    public CommentDO addComment(final int postID, @Nonnull final CommentInputDO commentInput) throws Exception {
+        final var comment = blogController.addComment(postID, commentInput.getUserName(), commentInput.getText());
+        return CommentMapper.map(comment);
+    }
+
+    @Override
+    @MutationMapping
+    public PostDO changePostState(final int postID, @Nonnull final PostStateDO state) throws Exception {
+        final var post = blogController.changePostState(postID, PostStateMapper.map(state));
+        return PostMapper.map(post);
+    }
+
+    // Field mapping
+    @SchemaMapping(typeName = "Post")
+    public List<CommentDO> comments(final PostDO post) {
+        return blogController.getPost(post.getPostID()).getComments().stream().map(CommentMapper::map).toList();
+    }
+
+    @SchemaMapping(typeName = "Post")
+    public int commentCount(final PostDO post) {
+        return blogController.getCommentCount(post.getPostID());
+    }
 }

task06/src/main/java/de/hftstuttgart/vs/task06/api/graphql/mapper/CommentMapper.java

@@ -1,13 +1,13 @@
 package de.hftstuttgart.vs.task06.api.graphql.mapper;
 
-//import de.hftstuttgart.vs.task06.bm.model.Comment;
+import de.hftstuttgart.vs.task06.api.graphql.model.CommentDO;
-//import de.hftstuttgart.vs.task06.api.graphql.model.CommentDO;
+import de.hftstuttgart.vs.task06.bm.model.Comment;
 
 public class CommentMapper {
 
-    /*public static CommentDO map(final Comment comment) {
+    public static CommentDO map(final Comment comment) {
         return CommentDO.builder()
                 .setText(comment.getText())
                 .build();
-    }*/
+    }
 }

task06/src/main/java/de/hftstuttgart/vs/task06/api/graphql/mapper/PostMapper.java

@@ -1,15 +1,16 @@
 package de.hftstuttgart.vs.task06.api.graphql.mapper;
 
-//import de.hftstuttgart.vs.task06.api.graphql.model.PostDO;
+import de.hftstuttgart.vs.task06.api.graphql.model.PostDO;
-//import de.hftstuttgart.vs.task06.bm.model.Post;
+import de.hftstuttgart.vs.task06.bm.model.Post;
+
 public class PostMapper {
 
-    /*public static PostDO map(final Post post) {
+    public static PostDO map(final Post post) {
         return PostDO.builder()
                 .setPostID(post.getPostID())
                 .setText(post.getText())
                 .setState(PostStateMapper.map(post.getState()))
                 .build();
-    }*/
+    }
 
 }

task06/src/main/java/de/hftstuttgart/vs/task06/api/graphql/mapper/PostStateMapper.java

@@ -1,15 +1,15 @@
 package de.hftstuttgart.vs.task06.api.graphql.mapper;
 
-//import de.hftstuttgart.vs.task06.api.graphql.model.PostStateDO;
+import de.hftstuttgart.vs.task06.api.graphql.model.PostStateDO;
-//import de.hftstuttgart.vs.task06.bm.model.PostState;
+import de.hftstuttgart.vs.task06.bm.model.PostState;
 
 public class PostStateMapper {
 
-    /*public static PostStateDO map(final PostState state) {
+    public static PostStateDO map(final PostState state) {
         return PostStateDO.valueOf(state.toString());
     }
 
     public static PostState map(final PostStateDO state) {
         return PostState.valueOf(state.toString());
-    }*/
+    }
 }

task06/src/main/resources/graphql/schema.graphqls

@@ -1,9 +1,39 @@
+type Post {
+    postID: Int!
+    text: String!
+    state: PostState!
+    user: User!
+    commentCount: Int!
+    comments: [Comment!]!
+}
+
+enum PostState {
+    PUBLISHED, UNPUBLISHED, LOCKED
+}
+
+type User {
+    userName: String!
+    firstName: String
+    lastName: String
+}
+
+type Comment {
+    text: String!
+    user: User!
+}
+
+input CommentInput {
+    text: String!
+    userName: String!
+}
+
 type Query {
-    helloWorld: HelloWorld!
+    posts: [Post!]!
 }
 
-type HelloWorld {
+type Mutation {
-    message: String
+    addPost(text: String!, userName: String!): Post
+    editPost(postID: Int!, text: String!): Post
+    addComment(postID: Int!, comment: CommentInput!): Comment
+    changePostState(postID: Int!, state: PostState!): Post
 }
-
-# TODO 1: Add type definitions for the blog service