added parent id to posts

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

@@ -1,6 +1,6 @@
 package de.anxietyprime.swajodel;
 
-import java.util.Date;
+import java.util.Objects;
 import java.util.Optional;
 import java.util.Vector;
 
@@ -14,7 +14,7 @@ public class JodelPost {
     // id of the post
     public Long id;
     // id of the author in db
-    private Long authorID;
+    private final Long authorID;
     // anonymized authorID
     public Long anonymousID;
     // title of the post
@@ -61,9 +61,10 @@ public class JodelPost {
     }
 
     // add a comment if it is really a comment
-    public boolean addComment(JodelPost post, long parent) {
+    public boolean addComment(JodelPost post) {
+        if (post.parent.isEmpty()) return true;
         // check if the post is a direct comment
-        if (parent == this.id) {
+        if (Objects.equals(post.parent.get(), this.id)) {
             // add the comment
             this.comments.add(post);
             // return success
@@ -72,7 +73,7 @@ public class JodelPost {
         // 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;
+            if (comment.addComment(post)) return true;
         }
         // return no success
         return false;
@@ -88,6 +89,7 @@ public class JodelPost {
         this.date = rs.getTimestamp("postdate");
         this.location = new Location(rs.getLong("longitude"), rs.getLong("latitude"));
         this.reactions = new Reactions(rs.getLong("positive"), rs.getLong("negative"));
+        this.parent = Optional.of(rs.getLong("parent"));
     }
 
     // constructor from authorID for tests
@@ -115,4 +117,10 @@ public class JodelPost {
     public long getAuthorID() {
         return authorID;
     }
+
+    @JsonIgnore
+    public boolean isComment() {
+        if (parent.isEmpty()) return false;
+        return !Objects.equals(id, parent.get());
+    }
 }