Big code clean-up, added interfaces, and colored text

Lab3/src/main/java/org/lumijiez/enums/DiffType.java

@@ -0,0 +1,15 @@
+package org.lumijiez.enums;
+
+public enum DiffType {
+    CREATE(StateType.NEW), DELETE(StateType.DELETED), MODIFY(StateType.MODIFIED), NONE(StateType.NONE);
+
+    private final StateType type;
+
+    DiffType(StateType type) {
+        this.type = type;
+    }
+
+    public StateType getState() {
+        return type;
+    }
+}

Lab3/src/main/java/org/lumijiez/enums/FileType.java

@@ -0,0 +1,16 @@
+package org.lumijiez.enums;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public enum FileType {
+    IMAGE, PLAINTEXT, FILE, CODE;
+    public List<String> typeExtensions;
+
+    static {
+        IMAGE.typeExtensions = new ArrayList<>(List.of("jpg", "png"));
+        PLAINTEXT.typeExtensions = new ArrayList<>(List.of("txt", "csv"));
+        FILE.typeExtensions = new ArrayList<>(List.of("doc", "pdf", "zip"));
+        CODE.typeExtensions = new ArrayList<>(List.of("java", "cpp", "py"));
+    }
+}

Lab3/src/main/java/org/lumijiez/enums/StateType.java

@@ -0,0 +1,14 @@
+package org.lumijiez.enums;
+
+public enum StateType {
+    NEW("Created"), MODIFIED("Modified"), DELETED("Deleted"), NONE("Nothing");
+
+    private final String action;
+    StateType(String name) {
+        this.action = name;
+    }
+
+    public String getAction() {
+        return this.action;
+    }
+}