typo

pom.xml

@@ -32,6 +32,12 @@
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.postgresql</groupId>
+            <artifactId>postgresql</artifactId>
+            <version>42.7.3</version>
+        </dependency>
+
     </dependencies>
 
     <build>

src/main/java/de/anxietyprime/swajodel/JodelPost.java

@@ -6,10 +6,9 @@ import java.util.Vector;
 
 public class JodelPost {
     // id of the post
-    private Long id;
+    public Long id;
     // id of the author in db
     private Long authorID;
-
     // anonymized authorID
     public Long anonymousID;
     // title of the post
@@ -53,8 +52,26 @@ public class JodelPost {
         }
     }
 
-    // TODO: create constructor
+    // add a comment if it is really a comment
-    public JodelPost(long id) {
+    public boolean addComment(JodelPost post, long parent) {
-        this.authorID = id;
+        // check if the post is a direct comment
+        if (parent == this.id) {
+            // add the comment
+            this.comments.add(post);
+            // return success
+            return true;
+        }
+        // recursively repeat this for all comments
+        for (JodelPost comment : this.comments) {
+            // return success if the post is a comment on a child
+            if (comment.addComment(post, parent)) return true;
+        }
+        // return no success
+        return false;
+    }
+
+    // constructor with private authorID
+    public JodelPost(long authorID) {
+        this.authorID = authorID;
     }
 }

src/main/java/de/anxietyprime/swajodel/Location.java

@@ -3,4 +3,9 @@ package de.anxietyprime.swajodel;
 public class Location {
     public float longitude;
     public float latitude;
+
+    public Location(float longitude, float latitude) {
+        this.longitude = longitude;
+        this.latitude = latitude;
+    }
 }

src/main/java/de/anxietyprime/swajodel/Routes.java

@@ -1,24 +1,123 @@
 package de.anxietyprime.swajodel;
 
-import com.fasterxml.jackson.databind.JsonSerializer;
 import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RestController;
 
+import java.sql.*;
+
 import java.util.Optional;
+import java.util.Vector;
 
 @RestController
 public class Routes {
 
-    @GetMapping("")
+    @GetMapping("/posts/{longitude}/{latitude}")
-    public JodelPost test() {
+    public Vector<JodelPost> getPosts(@PathVariable("longitude") float longitude, @PathVariable("latitude") float latitude) {
-        // TODO: remove dec post
+        // list of all posts (not comments) in range
-        JodelPost post = new JodelPost(100);
+        Vector<JodelPost> posts = new Vector<>();
 
-        // calculate anonymous IDs for the post
+        // DB connection and statement
-        post.anonymize(Optional.empty());
+        Connection c = null;
-        // return the post
+        PreparedStatement stmt = null;
-        return post;
+
+        // try to get data from db
+        try {
+            // check for the driver
+            Class.forName("org.postgresql.Driver");
+            // get the connection with credentials from env variables
+            c = DriverManager
+                    .getConnection("jdbc:postgresql://"+
+                                    System.getenv("POSTGRES_IP")+"/"+System.getenv("POSTGRES_DB"),
+                                    System.getenv("POSTGRES_USER"), System.getenv("POSTGRES_PASSWORD"));
+            // disable auto commits
+            c.setAutoCommit(false);
+
+            // create a new statement
+            stmt = c.prepareStatement("WITH RECURSIVE targets AS (\n" +
+                    "  SELECT\n" +
+                    "    id,\n" +
+                    "    id AS parent,\n" +
+                    "    author,\n" +
+                    "    title,\n" +
+                    "    content,\n" +
+                    "    postdate,\n" +
+                    "    postlocation[0] AS longitude,\n" +
+                    "    postlocation[1] AS latitude\n" +
+                    "  FROM\n" +
+                    "    posts\n" +
+                    "  WHERE\n" +
+                    "    deleted IS NULL\n" +
+                    "    AND sqrt(power(postlocation[0] - (?), 2) + power(postlocation[1] - (?), 2)) <= 10\n" +
+                    "    AND id NOT IN (SELECT child FROM comments)\n" +
+                    "  UNION\n" +
+                    "  SELECT\n" +
+                    "    com.child,\n" +
+                    "    com.parent,\n" +
+                    "    com.author,\n" +
+                    "    com.title,\n" +
+                    "    com.content,\n" +
+                    "    com.postdate,\n" +
+                    "    com.postlocation[0],\n" +
+                    "    com.postlocation[1]\n" +
+                    "  FROM\n" +
+                    "      (SELECT * FROM comments inner join posts ON comments.child = posts.id) com\n" +
+                    "          inner join targets ON targets.id = com.parent\n" +
+                    ")\n" +
+                    "SELECT * FROM targets;");
+
+            stmt.setObject(1, longitude);
+            stmt.setObject(2, latitude);
+
+            // query recursively for posts inside a 10km radius
+            ResultSet rs = stmt.executeQuery();
+
+            // for all the posts found
+            while ( rs.next() ) {
+                // create a post from the author id
+                JodelPost post = new JodelPost(rs.getLong("author"));
+                // add all other information to the post
+                post.id = rs.getLong("id");
+                post.title = rs.getString("title");
+                post.content = rs.getString("content");
+                post.date = rs.getDate("postdate");
+                post.location = new Location(rs.getLong("longitude"), rs.getLong("latitude"));
+
+                // get the posts parent
+                long parent = rs.getLong("parent");
+
+                // check if the parent is the own id
+                // if it is, it is a post
+                if (parent == post.id) {
+                    // add the post to the posts
+                    posts.add(post);
+                }
+                // else it is a comment
+                else {
+                    // iterate over all posts
+                    for (JodelPost p : posts) {
+                        // try to add the post to a parent
+                        p.addComment(post, parent);
+                    }
+                }
             }
 
+            // close all connections to db
+            rs.close();
+            stmt.close();
+            c.close();
+        }
 
+        // else log the error
+        catch ( Exception e ) {
+            System.err.println( e.getClass().getName()+": "+ e.getMessage() );
+        }
+
+        // calculate anonymous IDs for the posts
+        posts.forEach(post -> {
+            post.anonymize(Optional.empty());
+        });
+        // return the posts
+        return posts;
+    }
 }