handle saving notes and folders in a uniform way

ReactNativeClient/src/base-model.js

@@ -90,6 +90,17 @@ class BaseModel {
 		return model;
 	}
 
+	static diffObjects(oldModel, newModel) {
+		let output = {};
+		for (let n in newModel) {
+			if (!newModel.hasOwnProperty(n)) continue;
+			if (!(n in oldModel) || newModel[n] !== oldModel[n]) {
+				output[n] = newModel[n];
+			}
+		}
+		return output;
+	}
+
 	static saveQuery(o, isNew = 'auto') {
 		if (isNew == 'auto') isNew = !o.id;
 

ReactNativeClient/src/components/screens/note.js

@@ -5,6 +5,7 @@ import { Log } from 'src/log.js'
 import { Note } from 'src/models/note.js'
 import { Registry } from 'src/registry.js'
 import { ScreenHeader } from 'src/components/screen-header.js';
+import { NoteFolderService } from 'src/services/note-folder-service.js';
 
 class NoteScreenComponent extends React.Component {
 	
@@ -15,6 +16,7 @@ class NoteScreenComponent extends React.Component {
 	constructor() {
 		super();
 		this.state = { note: Note.new() }
+		this.originalNote = null;
 	}
 
 	componentWillMount() {
@@ -22,6 +24,7 @@ class NoteScreenComponent extends React.Component {
 			this.setState({ note: Note.new(this.props.folderId) });
 		} else {
 			Note.load(this.props.noteId).then((note) => {
+				this.originalNote = Object.assign({}, note);
 				this.setState({ note: note });
 			});
 		}
@@ -44,11 +47,9 @@ class NoteScreenComponent extends React.Component {
 	}
 
 	saveNoteButton_press = () => {
-		let isNew = !this.state.note.id;
-		Note.save(this.state.note).then((note) => {
-			if (isNew) return Note.updateGeolocation(note.id);
-		}).then(() => {
-			Registry.synchronizer().start();
+		NoteFolderService.save('note', this.state.note, this.originalNote).then((note) => {
+			this.originalNote = Object.assign({}, note);
+			this.setState({ note: note });
 		});
 	}
 

ReactNativeClient/src/services/note-folder-service.js

@@ -0,0 +1,41 @@
+// A service that handle notes and folders in a uniform way
+
+import { BaseService } from 'src/base-service.js';
+import { BaseModel } from 'src/base-model.js';
+import { Note } from 'src/models/note.js';
+import { Folder } from 'src/models/folder.js';
+import { Log } from 'src/log.js';
+import { Registry } from 'src/registry.js';
+
+class NoteFolderService extends BaseService {
+
+	static save(type, item, oldItem) {
+		if (oldItem) {
+			let diff = BaseModel.diffObjects(oldItem, item);
+			if (!Object.getOwnPropertyNames(diff).length) {
+				Log.info('Item not changed - not saved');
+				return Promise.resolve(item);
+			}
+		}
+
+		let ItemClass = null;
+		if (type == 'note') {
+			ItemClass = Note;
+		} else if (type == 'folder') {
+			ItemClass = Folder;
+		}
+
+		let isNew = !item.id;
+		let output = null;
+		return ItemClass.save(item).then((item) => {
+			output = item;
+			if (isNew && type == 'note') return Note.updateGeolocation(item.id);
+		}).then(() => {
+			Registry.synchronizer().start();
+			return output;
+		});
+	}
+
+}
+
+export { NoteFolderService };