working on saving wiki pages

core/src/main/java/de/srsoftware/umbrella/core/model/WikiPage.java

@@ -1,24 +1,24 @@
 package de.srsoftware.umbrella.core.model;
 
 import de.srsoftware.tools.Mappable;
+import de.srsoftware.umbrella.core.exceptions.UmbrellaException;
+import org.json.JSONObject;
 
 import java.sql.ResultSet;
 import java.sql.SQLException;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
+import java.util.*;
 
 import static de.srsoftware.umbrella.core.Constants.*;
 import static de.srsoftware.umbrella.core.Util.markdown;
 
 public class WikiPage implements Mappable {
 
-	private final String id;
-	private final int version;
+	private String id;
+	private int version;
 	private final List<Integer> versions = new ArrayList<>();
 	private final Map<Long,Member> members = new HashMap<>();
-	private final String content;
+	private String content;
+	private Set<String> dirtyFields = new HashSet<>();
 
 	public WikiPage(String id, int version, String content) {
 		this.id = id;
@@ -38,6 +38,28 @@ public class WikiPage implements Mappable {
 		return new WikiPage(rs.getString(ID),rs.getInt(VERSION),rs.getString(CONTENT));
 	}
 
+	public WikiPage patch(JSONObject json) {
+		for (var key : json.keySet()){
+			var val = json.get(key);
+			var altered = true;
+			switch (key){
+				case ID:
+					if (!(val instanceof String s)) throw UmbrellaException.invalidFieldException(ID,"String");
+					id = s; break;
+				case CONTENT:
+					if (!(val instanceof String s)) throw UmbrellaException.invalidFieldException(CONTENT,"String");
+					content = s; break;
+				default:
+					altered = false;
+			}
+			if (altered) {
+				dirtyFields.add(key);
+				version++;
+			}
+		}
+		return this;
+	}
+
 	@Override
 	public Map<String, Object> toMap() {
 		var memberMap = new HashMap<Long,Map<String,Object>>();