Add post checksum mode

src/main/java/de/jeyp91/App.java

@@ -22,7 +22,7 @@ public class App {
     private static int season;
     private static int league;
     private static String configFile;
-    private static Logger logger = LogManager.getLogger(App.class);
+    private static final Logger logger = LogManager.getLogger(App.class);
 
     public static void main(String[] args) throws Exception {
         Configurator.setRootLevel(Level.INFO);
@@ -56,6 +56,17 @@ public class App {
                 MatchesListForumUpdater matchesListForumUpdater = new MatchesListForumUpdater();
                 matchesListForumUpdater.updateAllLeagues();
                 break;
+            case "PostChecksum":
+                TippligaSQLConnector con = TippligaSQLConnector.getInstance();
+                int forumId;
+                if (season == 2021) {
+                    forumId = 15;
+                } else {
+                    throw new Exception("Season does not exist");
+                }
+                String checksum = con.getChecksumOfPost(forumId, configFile);
+                System.out.println(checksum);
+                break;
             default:
                 break;
         }
@@ -76,7 +87,7 @@ public class App {
 
         parser.addArgument("-m", "--mode")
                 .dest("mode")
-                .choices("MatchdaysUpdater", "MatchesCreatorFootball", "MatchesUpdaterFootball", "TeamsUpdater", "APIFootballUpdater", "MatchesListGistUpdater")
+                .choices("MatchdaysUpdater", "MatchesCreatorFootball", "MatchesUpdaterFootball", "TeamsUpdater", "APIFootballUpdater", "MatchesListGistUpdater", "PostChecksum")
                 .help("")
                 .required(true)
                 .type(String.class);

src/main/java/de/jeyp91/tippligaforum/TippligaSQLConnector.java

@@ -210,6 +210,20 @@ public class TippligaSQLConnector {
         executeUpdate(query);
     }
 
+    public String getChecksumOfPost(int forum_id, String subject) {
+        String queryString = "SELECT post_checksum FROM phpbb_posts WHERE forum_id = " + forum_id + " AND post_subject = '" + subject + "'";
+        ResultSet rset = executeQuery(queryString);
+        String checksum = null;
+        try {
+            while (rset.next()) {
+                checksum = rset.getString(1);
+            }
+        } catch (SQLException throwables) {
+            throwables.printStackTrace();
+        }
+        return checksum;
+    }
+
     public String getPostUpdateQuery(int postId, String postText, String postChecksum, long postEditTime, String postEditReason, int postEditUser) {
         return "UPDATE phpbb_posts SET " +
                 "post_text = '" + postText + "', " +