FBX Animation Organizer

FBXAnimationOrganizer.cs

// https://forum.unity.com/threads/reordering-fbx-animation-clips.1168847/#post-9825564
/*******************
WARNING: MAKE SURE YOUR METADATA FILES ARE BACKED UP WITH VERSION CONTROL BEFORE USING
Installation:
Copy this C# script into Scripts\Editor.  

Usage:
1) To open, go to Window -> FBX Animation Organizer
2) Enter the local directory location of your fbx meta files in the "Directory" field (Right click on the folder in Project window -> Copy Path)
3) Select the meta file to edit from the "File" dropdown
4) Press the "Import Metadata" button
5) Select the animations and move them with the "Move Up" or "Move Down" buttons
6) Press "Overwrite Metadata" button to save and overwrite the old metadata file
7) Press "Refresh Inspector" to update your changes

Known Bugs:
1) Pressing "Overwrite Metadata" 2x in a row will duplicate the animations list.
1) Pressing "Overwrite Metadata" again after changing the meta file, but not importing the new metafile will cause errors

******************/

using UnityEngine;
using UnityEditor;
using System.Collections.Generic;
using System.Linq;
using System.IO;

public class FBXAnimationOrganizer : EditorWindow {
	GUIStyle itemStyle = new GUIStyle();
	string inputPath = "Assets\\";
	string fileName;
	List<string> metadataHeader = new List<string>();
	List<string> metadata = new List<string>();
	List<List<string>> animations = new List<List<string>>();       //List that holds each animation's data as another list
	List<string> animNames = new List<string>();                    //List of animation names
	int selectedAnimationIndex = -1;
	int selectedFileNameIndex = -1;

	[MenuItem("Window/FBX Animation Organizer")]

	static void Init() {
		var window = GetWindow(typeof(FBXAnimationOrganizer));
		window.titleContent = new GUIContent("FBX Animation Organizer");
		window.Show();
	}

	private void OnGUI() {
		//Directory Field
		inputPath = EditorGUILayout.TextField("Directory:", inputPath);
		if (GUI.changed) {
			inputPath = EditorGUILayout.TextField(inputPath);
			GUILayout.Label(fileName);
		}

		//Metadata File Dropdown
		GUILayout.BeginHorizontal();
		if (Directory.Exists(inputPath)) {
			GUILayout.Label("File:");
			int oldSelectedFileNameIndex = selectedFileNameIndex;
			string[] filesUnedited = Directory.GetFiles(inputPath, "*meta", SearchOption.AllDirectories);
			//Edit the filename so it looks nice
			string[] filesEdited = new string[filesUnedited.Count()];
			for (var i = 0; i < filesUnedited.Count(); i++) {
				filesEdited[i] = filesUnedited[i];
				int lastSlash = filesEdited[i].LastIndexOf("\\");
				filesEdited[i] = filesEdited[i].Substring(lastSlash + 1, filesEdited[i].Count() - 1 - lastSlash);
			}
			selectedFileNameIndex = EditorGUILayout.Popup(selectedFileNameIndex, filesEdited);
			if (selectedFileNameIndex != -1) fileName = filesEdited[selectedFileNameIndex];
			//Clear out data if selecting a new file
			if (oldSelectedFileNameIndex != selectedFileNameIndex) {
				ClearData();
			}
		}
		GUILayout.EndHorizontal();

		GUILayout.BeginHorizontal();
		//Import Metadata Button
		if (GUILayout.Button("Import Metadata")) {
			ClearData();
			//Read the input file into a list and copy them to another list for editing
			var logFile = File.ReadAllLines(inputPath + "\\" + fileName);
			metadata = new List<string>(logFile);
			//Get the header of the metadata file
			int pTo = metadata.IndexOf("    clipAnimations:");
			for (int x = 0; x <= pTo; x++) {
				metadataHeader.Add(metadata[0]);
				metadata.RemoveAt(0);
			}
			//Get all the animation data
			for (int i = 0; i <= 50; i++) {
				//Get the start and end points of the animation entry	
				int pFrom = metadata.IndexOf("    - serializedVersion: 16");
				pTo = metadata.IndexOf("      additiveReferencePoseFrame: 0");
				//Exit when you get the last entry
				if (pFrom < 0) break;
				//Add the names and animation entries to the respective lists
				animNames.Add(metadata[pFrom + 1].Replace("  name: ", ""));
				//Save the animation entry and remove from the edited metadata
				List<string> animData = new List<string>();
				for (int x = 0; x <= pTo - pFrom; x++) {
					animData.Insert(0, metadata[pFrom]);
					metadata.RemoveAt(pFrom);
				}
				animations.Add(animData);
			}
		}

		//Overwrite Metadata Button
		if (GUILayout.Button("Overwrite Metadata")) {
			string savePath = inputPath + "/" + fileName;
			using StreamWriter sw = new StreamWriter(savePath, false);
			//Copy in the animations
			for (int i = animations.Count() - 1; i >= 0; i--) {
				foreach (string entry in animations[i])
					metadata.Insert(0, entry);
			}
			//Copy in the header
			for (var i = metadataHeader.Count() - 1; i >= 0; i--) {
				metadata.Insert(0, metadataHeader[i]);
			}
			//Write all the lines into the metadata file
			for (int i = 0; i < metadata.Count(); i++) {
				sw.WriteLine(metadata[i]);
			}
			Debug.Log("Saved " + savePath);
		}
		GUILayout.EndHorizontal();

		//Refresh Button - updates the inspector
		if (GUILayout.Button("Refresh Inspector")) {
			AssetDatabase.Refresh();
		}

		//Lazy spacer
		GUILayout.Label("");

		//Move Up Button
		GUILayout.BeginHorizontal();
		if (GUILayout.Button("Move Up")) {
			if (selectedAnimationIndex != 0 && selectedAnimationIndex != -1) {
				List<string> animBackup = new List<string>();
				animBackup = animations[selectedAnimationIndex];
				animations.RemoveAt(selectedAnimationIndex);
				animations.Insert(selectedAnimationIndex - 1, animBackup);
				string nameBackup = animNames[selectedAnimationIndex];
				animNames.RemoveAt(selectedAnimationIndex);
				animNames.Insert(selectedAnimationIndex - 1, nameBackup);
				selectedAnimationIndex -= 1;
			}
		}

		//Move Down Button
		if (GUILayout.Button("Move Down")) {
			if (selectedAnimationIndex != animations.Count() - 1 && selectedAnimationIndex != -1) {
				List<string> animBackup = new List<string>();
				animBackup = animations[selectedAnimationIndex];
				animations.RemoveAt(selectedAnimationIndex);
				animations.Insert(selectedAnimationIndex + 1, animBackup);
				string nameBackup = animNames[selectedAnimationIndex];
				animNames.RemoveAt(selectedAnimationIndex);
				animNames.Insert(selectedAnimationIndex + 1, nameBackup);
				selectedAnimationIndex += 1;
			}
		}
		GUILayout.EndHorizontal();

		//Selectable Animations List
		for (int i = 0; i < animNames.Count(); i++) {
			itemStyle = new GUIStyle(GUI.skin.button);
			//Set style
			Color color_default = GUI.backgroundColor;
			Color color_selected = Color.gray;
			GUI.changed = false;
			itemStyle.alignment = TextAnchor.MiddleLeft;
			itemStyle.active.background = itemStyle.normal.background;
			itemStyle.margin = new RectOffset(0, 0, 0, 0);
			GUI.backgroundColor = (selectedAnimationIndex == i) ? color_selected : Color.clear;
			//Change the index when selecting the animation
			if (GUILayout.Button(animNames[i], itemStyle)) {
				selectedAnimationIndex = i;
			}
		}
	}

	//Resets all the data
	private void ClearData() {
		animNames.Clear();
		animations.Clear();
		metadataHeader.Clear();
		metadata.Clear();
		selectedAnimationIndex = -1;
	}
}