added get endpoint for posts by id

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

@@ -4,6 +4,8 @@ import java.util.Date;
 import java.util.Optional;
 import java.util.Vector;
 
+import java.sql.*;
+
 public class JodelPost {
     // id of the post
     public Long id;
@@ -24,7 +26,7 @@ public class JodelPost {
     // the own reaction (null = none, true = positive, false = negative)
     public Optional<Boolean> reaction;
     // all other reactions
-    public Reaction reactions;
+    public Reactions reactions;
 
     // anonymize function to recursively anonymize the posts
     public void anonymize(Optional<Vector<Long>> idCache) {
@@ -70,8 +72,15 @@ public class JodelPost {
         return false;
     }
 
-    // constructor with private authorID
-    public JodelPost(long authorID) {
-        this.authorID = authorID;
+    // constructor from
+    public JodelPost(ResultSet rs) throws SQLException {
+        // add all other information to the post
+        this.authorID = rs.getLong("author");
+        this.id = rs.getLong("id");
+        this.title = rs.getString("title");
+        this.content = rs.getString("content");
+        this.date = rs.getDate("postdate");
+        this.location = new Location(rs.getLong("longitude"), rs.getLong("latitude"));
+        this.reactions = new Reactions(rs.getLong("positive"), rs.getLong("negative"));
     }
 }