DM-408, add error highlighting for rule edits

apps/red-ui/src/app/modules/admin/screens/rules/rules-screen/rules-screen.component.ts

@@ -13,27 +13,35 @@ import ICodeEditor = monaco.editor.ICodeEditor;
 import IModelDeltaDecoration = monaco.editor.IModelDeltaDecoration;
 import IStandaloneEditorConstructionOptions = monaco.editor.IStandaloneEditorConstructionOptions;
 
+interface SyntaxError {
+    line: number;
+    column: number;
+    message: string;
+}
+
 @Component({
     templateUrl: './rules-screen.component.html',
     styleUrls: ['./rules-screen.component.scss'],
     changeDetection: ChangeDetectionStrategy.OnPush,
 })
 export class RulesScreenComponent implements OnInit, ComponentCanDeactivate {
-    @ViewChild('fileInput')
-    private _fileInput: ElementRef;
-    private _codeEditor: ICodeEditor;
-    private _decorations: string[] = [];
-    readonly #dossierTemplateId = getParam(DOSSIER_TEMPLATE_ID);
     readonly iconButtonTypes = IconButtonTypes;
     readonly editorOptions: IStandaloneEditorConstructionOptions = {
         theme: 'vs',
         language: 'java',
         automaticLayout: true,
         readOnly: !this.permissionsService.canEditRules(),
+        glyphMargin: true,
     };
     initialLines: string[] = [];
     currentLines: string[] = [];
     isLeaving = false;
+    @ViewChild('fileInput')
+    private _fileInput: ElementRef;
+    private _codeEditor: ICodeEditor;
+    private _decorations: string[] = [];
+    private _errorGlyphs: string[] = [];
+    readonly #dossierTemplateId = getParam(DOSSIER_TEMPLATE_ID);
 
     constructor(
         readonly permissionsService: PermissionsService,
@@ -92,9 +100,12 @@ export class RulesScreenComponent implements OnInit, ComponentCanDeactivate {
         ).then(
             async () => {
                 await this._initialize();
+                this._removeErrorMarkers();
                 this._toaster.success(_('rules-screen.success.generic'));
             },
-            () => {
+            error => {
+                const errors = error.error as SyntaxError[] | undefined;
+                this._drawErrorMarkers(errors);
                 this._loadingService.stop();
                 this._toaster.error(_('rules-screen.error.generic'));
             },
@@ -104,6 +115,7 @@ export class RulesScreenComponent implements OnInit, ComponentCanDeactivate {
     revert(): void {
         this.currentLines = this.initialLines;
         this._decorations = this._codeEditor?.deltaDecorations(this._decorations, []) || [];
+        this._removeErrorMarkers();
         this._changeDetectorRef.detectChanges();
         this._loadingService.stop();
     }
@@ -142,6 +154,45 @@ export class RulesScreenComponent implements OnInit, ComponentCanDeactivate {
         } as IModelDeltaDecoration;
     }
 
+    private _drawErrorMarkers(errors: SyntaxError[] | undefined) {
+        const model = this._codeEditor?.getModel();
+        if (!model || !errors?.length) {
+            return;
+        }
+        const markers = [];
+        const glyphs = [];
+        errors
+            .filter(e => e.line > 0)
+            .forEach(e => {
+                const endColumn = model.getLineLength(e.line) + 1;
+                markers.push({
+                    message: e.message,
+                    severity: monaco.MarkerSeverity.Error,
+                    startLineNumber: e.line,
+                    startColumn: e.column,
+                    endLineNumber: e.line,
+                    endColumn,
+                });
+                glyphs.push({
+                    range: new monaco.Range(e.line, e.column, e.line, endColumn),
+                    options: {
+                        glyphMarginClassName: 'error-glyph-margin',
+                    },
+                });
+            });
+        this._errorGlyphs = this._codeEditor.deltaDecorations(this._errorGlyphs, glyphs);
+        (window as any).monaco.editor.setModelMarkers(model, model.id, markers);
+    }
+
+    private _removeErrorMarkers() {
+        const model = this._codeEditor?.getModel();
+        if (!model) {
+            return;
+        }
+        (window as any).monaco.editor.setModelMarkers(model, model.id, []);
+        this._errorGlyphs = this._codeEditor?.deltaDecorations(this._errorGlyphs, []) || [];
+    }
+
     private async _initialize() {
         this._loadingService.start();
         await firstValueFrom(this._rulesService.download(this.#dossierTemplateId)).then(

apps/red-ui/src/styles.scss

@@ -39,6 +39,11 @@
     src: url('./assets/styles/fonts/Inter-VariableFont.ttf') format('truetype');
 }
 
+.error-glyph-margin {
+    background: url('./assets/icons/general/alert-circle.svg') no-repeat center;
+    background-size: 80%;
+}
+
 @include common-variables.configureLight(
     $iqser-primary: vars.$primary,
     $iqser-primary-rgb: common-functions.hexToRgb(vars.$primary),