feat: select component: add error message

refs #609

src/app/components/generic-select/generic-select.component.html

@@ -23,3 +23,6 @@
 <div *ngIf="messageWhenEmpty" class="message-when-empty">
     {{ messageWhenEmpty }}
 </div>
+<div *ngIf="errorMessage" class="message-when-empty">
+    {{ errorMessage }}
+</div>

src/app/components/results-chart/chart-type.component.ts

@@ -53,6 +53,10 @@ export class ChartTypeSelectComponent implements IObservable {
         return this._select.messageWhenEmpty;
     }
 
+    public get errorMessage(): string {
+        return undefined;
+    }
+
     public get enableHelpButton(): boolean {
         return false;
     }

src/app/components/select-field-line/select-field-line.component.ts

@@ -45,6 +45,12 @@ export class SelectFieldLineComponent implements OnInit {
         return this._select.messageWhenEmpty;
     }
 
+    public get errorMessage(): string {
+        if (this._select.errorMessage !== undefined) {
+            return this.i18nService.localizeMessage(this._select.errorMessage);
+        }
+    }
+
     protected entryLabel(entry: SelectEntry): string {
         return decodeHtml(entry.label);
     }

src/app/formulaire/elements/select/select-field.ts

@@ -4,7 +4,7 @@ import { arraysAreEqual } from "../../../util/util";
 import { FormulaireNode } from "../formulaire-node";
 import { ServiceFactory } from "app/services/service-factory";
 import { FormulaireDefinition } from "../../definition/form-definition";
-import { enumValueFromString, Nub } from "jalhyd";
+import { enumValueFromString, Message, Nub } from "jalhyd";
 
 export abstract class SelectField extends Field {
 
@@ -301,6 +301,10 @@ export abstract class SelectField extends Field {
         return msg;
     }
 
+    public get errorMessage(): Message {
+        return undefined;
+    }
+
     public get multiple(): boolean {
         return this._multiple;
     }