Programming exercises: Prevent online code editor from overwriting other files during build/refresh

src/main/webapp/app/programming/manage/code-editor/container/code-editor-container.component.ts

@@ -246,8 +246,8 @@ export class CodeEditorContainerComponent implements OnChanges, ComponentCanDeac
     /**
      * When the content of a file changes, set it as unsaved.
      */
-    onFileContentChange({ file, fileContent }: { file: string; fileContent: string }) {
-        this.unsavedFiles = { ...this.unsavedFiles, [file]: fileContent };
+    onFileContentChange({ fileName, text }: { fileName: string; text: string }) {
+        this.unsavedFiles = { ...this.unsavedFiles, [fileName]: text };
         this.onFileChanged.emit();
     }
 

src/main/webapp/app/programming/manage/update/update-components/custom-build-plans/programming-exercise-custom-aeolus-build-plan.component.spec.ts

@@ -134,7 +134,7 @@ describe('ProgrammingExercise Aeolus Custom Build Plan', () => {
     it('should change code of active action', () => {
         comp.changeActiveAction('gradle');
         expect(comp.code).toBe(gradleBuildAction.script);
-        comp.codeChanged('test');
+        comp.codeChanged({ text: 'test', fileName: 'build-script.sh' });
         expect(gradleBuildAction.script).toBe('test');
     });
 
@@ -166,7 +166,7 @@ describe('ProgrammingExercise Aeolus Custom Build Plan', () => {
 
     it('should change code', () => {
         comp.changeActiveAction('gradle');
-        comp.codeChanged('this is some code');
+        comp.codeChanged({ text: 'this is some code', fileName: 'build-script.sh' });
         const action: BuildAction | undefined = comp.active;
         expect(action).toBeDefined();
         expect(action).toBeInstanceOf(ScriptAction);

src/main/webapp/app/programming/manage/update/update-components/custom-build-plans/programming-exercise-custom-aeolus-build-plan.component.ts

@@ -172,9 +172,9 @@ export class ProgrammingExerciseCustomAeolusBuildPlanComponent implements OnChan
         }
     }
 
-    codeChanged(code: string): void {
+    codeChanged(event: { text: string; fileName: string }): void {
         if (this.active instanceof ScriptAction) {
-            (this.active as ScriptAction).script = code;
+            (this.active as ScriptAction).script = event.text;
         }
     }
 

src/main/webapp/app/programming/manage/update/update-components/custom-build-plans/programming-exercise-custom-build-plan.component.ts

@@ -128,7 +128,8 @@ export class ProgrammingExerciseCustomBuildPlanComponent implements OnChanges {
 
     faQuestionCircle = faQuestionCircle;
 
-    codeChanged(code: string): void {
+    codeChanged(codeOrEvent: string | { text: string; fileName: string }): void {
+        const code = typeof codeOrEvent === 'string' ? codeOrEvent : codeOrEvent.text;
         this.code = code;
         this.editor?.setText(code);
         this.programmingExercise.buildConfig!.buildScript = code;

src/main/webapp/app/programming/shared/code-editor/monaco/code-editor-monaco.component.spec.ts

@@ -139,8 +139,8 @@ describe('CodeEditorMonacoComponent', () => {
         fixture.detectChanges();
         comp.fileSession.set(fileSession);
         fixture.componentRef.setInput('selectedFile', selectedFile);
-        comp.onFileTextChanged(newCode);
-        expect(valueCallbackStub).toHaveBeenCalledExactlyOnceWith({ file: selectedFile, fileContent: newCode });
+        comp.onFileTextChanged({ text: newCode, fileName: selectedFile });
+        expect(valueCallbackStub).toHaveBeenCalledExactlyOnceWith({ fileName: selectedFile, text: newCode });
         expect(comp.fileSession()).toEqual({
             [selectedFile]: { ...fileSession[selectedFile], code: newCode, scrollTop: 0 },
         });

src/main/webapp/app/programming/shared/code-editor/monaco/code-editor-monaco.component.ts

@@ -82,7 +82,7 @@ export class CodeEditorMonacoComponent implements OnChanges {
     readonly buildAnnotations = input<Annotation[]>([]);
 
     readonly onError = output<string>();
-    readonly onFileContentChange = output<{ file: string; fileContent: string }>();
+    readonly onFileContentChange = output<{ fileName: string; text: string }>();
     readonly onUpdateFeedback = output<Feedback[]>();
     readonly onFileLoad = output<string>();
     readonly onAcceptSuggestion = output<Feedback>();
@@ -213,16 +213,25 @@ export class CodeEditorMonacoComponent implements OnChanges {
         this.editor().setScrollTop(this.fileSession()[this.selectedFile()!].scrollTop ?? 0);
     }
 
-    onFileTextChanged(text: string): void {
-        if (this.selectedFile() && this.fileSession()[this.selectedFile()!]) {
-            const previousText = this.fileSession()[this.selectedFile()!].code;
-            const previousScrollTop = this.fileSession()[this.selectedFile()!].scrollTop;
+    onFileTextChanged(event: { text: string; fileName: string }): void {
+        const { text, fileName } = event;
+        // Apply text change to the specific file it belongs to, not the currently selected file
+        if (fileName && this.fileSession()[fileName]) {
+            const previousText = this.fileSession()[fileName].code;
+            const previousScrollTop = this.fileSession()[fileName].scrollTop;
+
             if (previousText !== text) {
                 this.fileSession.set({
                     ...this.fileSession(),
-                    [this.selectedFile()!]: { code: text, loadingError: false, scrollTop: previousScrollTop, cursor: this.editor().getPosition() },
+                    [fileName]: {
+                        code: text,
+                        loadingError: false,
+                        scrollTop: previousScrollTop,
+                        cursor: fileName === this.selectedFile() ? this.editor().getPosition() : this.fileSession()[fileName].cursor,
+                    },
                 });
-                this.onFileContentChange.emit({ file: this.selectedFile()!, fileContent: text });
+
+                this.onFileContentChange.emit({ fileName, text });
             }
         }
     }

src/main/webapp/app/shared/markdown-editor/monaco/markdown-editor-monaco.component.spec.ts

@@ -79,7 +79,7 @@ describe('MarkdownEditorMonacoComponent', () => {
         const text = 'test';
         const textChangeSpy = jest.spyOn(comp.markdownChange, 'emit');
         fixture.detectChanges();
-        comp.onTextChanged(text);
+        comp.onTextChanged({ text: text, fileName: 'test-file.md' });
         expect(textChangeSpy).toHaveBeenCalledWith(text);
         expect(comp._markdown).toBe(text);
     });

src/main/webapp/app/shared/markdown-editor/monaco/markdown-editor-monaco.component.ts

@@ -445,9 +445,9 @@ export class MarkdownEditorMonacoComponent implements AfterContentInit, AfterVie
         this.resizeObserver?.disconnect();
     }
 
-    onTextChanged(text: string): void {
-        this.markdown = text;
-        this.markdownChange.emit(text);
+    onTextChanged(event: { text: string; fileName: string }): void {
+        this.markdown = event.text;
+        this.markdownChange.emit(event.text);
     }
 
     /**

src/main/webapp/app/shared/monaco-editor/monaco-editor.component.spec.ts

@@ -55,7 +55,7 @@ describe('MonacoEditorComponent', () => {
         fixture.detectChanges();
         comp.textChanged.subscribe(valueCallbackStub);
         comp.setText(singleLineText);
-        expect(valueCallbackStub).toHaveBeenCalledExactlyOnceWith(singleLineText);
+        expect(valueCallbackStub).toHaveBeenCalledExactlyOnceWith({ text: singleLineText, fileName: expect.any(String) });
     });
 
     it('should only send a notification once per delay interval', fakeAsync(() => {
@@ -68,7 +68,7 @@ describe('MonacoEditorComponent', () => {
         tick(1);
         comp.setText(singleLineText);
         tick(delay);
-        expect(valueCallbackStub).toHaveBeenCalledExactlyOnceWith(singleLineText);
+        expect(valueCallbackStub).toHaveBeenCalledExactlyOnceWith({ text: singleLineText, fileName: expect.any(String) });
     }));
 
     it('should be set to readOnly depending on the input', () => {

src/main/webapp/app/shared/monaco-editor/monaco-editor.component.ts

@@ -56,7 +56,7 @@ export class MonacoEditorComponent implements OnInit, OnDestroy {
     stickyScroll = input<boolean>(false);
     readOnly = input<boolean>(false);
 
-    textChanged = output<string>();
+    textChanged = output<{ text: string; fileName: string }>();
     contentHeightChanged = output<number>();
     onBlurEditor = output<void>();
 
@@ -66,7 +66,7 @@ export class MonacoEditorComponent implements OnInit, OnDestroy {
     private contentHeightListener?: Disposable;
     private textChangedListener?: Disposable;
     private blurEditorWidgetListener?: Disposable;
-    private textChangedEmitTimeout?: NodeJS.Timeout;
+    private textChangedEmitTimeouts = new Map<string, NodeJS.Timeout>();
     private customBackspaceCommandId: string | undefined;
 
     /*
@@ -177,22 +177,46 @@ export class MonacoEditorComponent implements OnInit, OnDestroy {
         this.textChangedListener?.dispose();
         this.contentHeightListener?.dispose();
         this.blurEditorWidgetListener?.dispose();
+
+        // Clean up all per-model debounce timeouts
+        this.textChangedEmitTimeouts.forEach((timeout) => clearTimeout(timeout));
+        this.textChangedEmitTimeouts.clear();
     }
 
     private emitTextChangeEvent() {
         const newValue = this.getText();
         const delay = this.textChangedEmitDelay();
+        const model = this.getModel();
+        const fullFilePath = this.extractFilePathFromModel(model);
+
         if (!delay) {
-            this.textChanged.emit(newValue);
-        } else {
-            if (this.textChangedEmitTimeout) {
-                clearTimeout(this.textChangedEmitTimeout);
-                this.textChangedEmitTimeout = undefined;
-            }
-            this.textChangedEmitTimeout = setTimeout(() => {
-                this.textChanged.emit(newValue);
-            }, delay);
+            this.textChanged.emit({ text: newValue, fileName: fullFilePath });
+            return;
+        }
+        const modelKey = model?.uri?.toString() ?? '';
+        const existing = this.textChangedEmitTimeouts.get(modelKey);
+        if (existing) {
+            clearTimeout(existing);
+        }
+        const timeoutId = setTimeout(() => {
+            this.textChanged.emit({ text: newValue, fileName: fullFilePath });
+            this.textChangedEmitTimeouts.delete(modelKey);
+        }, delay);
+        this.textChangedEmitTimeouts.set(modelKey, timeoutId);
+    }
+
+    private extractFilePathFromModel(model: monaco.editor.ITextModel | null): string {
+        const path = model?.uri?.path ?? '';
+        if (!path) {
+            return '';
+        }
+        // Path format: /model/<editorId>/<full/file/path>
+        const parts = path.split('/').filter(Boolean);
+        if (parts.length >= 3 && parts[0] === 'model') {
+            return parts.slice(2).join('/');
         }
+        // Fallback: best effort
+        return parts.slice(1).join('/') || parts[parts.length - 1] || '';
     }
 
     getPosition(): EditorPosition {

src/test/javascript/spec/integration/code-editor/code-editor-container.integration.spec.ts

@@ -320,7 +320,7 @@ describe('CodeEditorContainerIntegration', () => {
         await loadFile(selectedFile, fileContent);
 
         containerFixture.detectChanges();
-        container.monacoEditor.onFileTextChanged(newFileContent);
+        container.monacoEditor.onFileTextChanged({ text: newFileContent, fileName: selectedFile });
         containerFixture.detectChanges();
 
         expect(getFileStub).toHaveBeenCalledOnce();