Allow LoadEditor through external resource

src/App.tsx

@@ -40,6 +40,22 @@ export class App extends React.Component<IAppProps> {
     };
   }
 
+  componentDidMount() {
+    const queryString = window.location.search;
+    const urlParams = new URLSearchParams(queryString);
+    const state = urlParams.get('state');
+
+    if (state === null) {
+      return;
+    }
+
+    fetch(state)
+      .then((response) => response.json())
+      .then((data: IEditorState) => {
+        this.LoadState(data);
+      });
+  }
+
   public NewEditor() {
     // Fetch the configuration from the API
     fetchConfiguration().then((configuration: Configuration) => {
@@ -86,6 +102,12 @@ export class App extends React.Component<IAppProps> {
       const result = reader.result as string;
       const editorState: IEditorState = JSON.parse(result);
 
+      this.LoadState(editorState);
+    });
+    reader.readAsText(file);
+  }
+
+  private LoadState(editorState: IEditorState) {
     Revive(editorState);
 
     this.setState({
@@ -94,8 +116,6 @@ export class App extends React.Component<IAppProps> {
       historyCurrentStep: editorState.historyCurrentStep,
       isLoaded: true
     } as IAppState);
-    });
-    reader.readAsText(file);
   }
 
   public render() {