#440 basic REST services support for dropdown widget

ng2-components/ng2-activiti-form/src/components/widgets/dropdown/dropdown.widget.ts

@@ -15,7 +15,10 @@
  * limitations under the License.
  */
 
-import { Component } from '@angular/core';
+import { Component, OnInit, NgZone } from '@angular/core';
+import { Observable } from 'rxjs/Rx';
+import { Http } from '@angular/http';
+import { ObjectUtils } from 'ng2-alfresco-core';
 import { WidgetComponent } from './../widget.component';
 
 declare let __moduleName: string;
@@ -27,6 +30,53 @@ declare var componentHandler;
     templateUrl: './dropdown.widget.html',
     styleUrls: ['./dropdown.widget.css']
 })
-export class DropdownWidget extends WidgetComponent {
+export class DropdownWidget extends WidgetComponent implements OnInit {
+
+    constructor(private http: Http,
+                private zone: NgZone) {
+        super();
+    }
+
+    ngOnInit() {
+        if (this.field &&
+            this.field.optionType === 'rest' &&
+            this.field.restUrl &&
+            this.field.restIdProperty &&
+            this.field.restLabelProperty) {
+
+            let url = `${this.field.restUrl}`;
+            this.http.get(url).subscribe(
+                response => {
+                    let json: any = response.json();
+                    this.loadFromJson(json);
+                },
+                this.handleError
+            );
+
+        }
+    }
+
+    // TODO: support 'restResponsePath'
+    private loadFromJson(json: any) {
+        if (json instanceof Array) {
+            let options = json.map(obj => {
+                return {
+                    id: ObjectUtils.getValue(obj, this.field.restIdProperty).toString(),
+                    name: ObjectUtils.getValue(obj, this.field.restLabelProperty).toString()
+                };
+            });
+            this.field.options = options;
+            this.field.updateForm();
+        }
+    }
+
+    private handleError (error: any) {
+        // In a real world app, we might use a remote logging infrastructure
+        // We'd also dig deeper into the error to get a better message
+        let errMsg = (error.message) ? error.message :
+            error.status ? `${error.status} - ${error.statusText}` : 'Server error';
+        console.error(errMsg); // log to console instead
+        return Observable.throw(errMsg);
+    }
 
 }

ng2-components/ng2-activiti-form/src/components/widgets/widget.model.ts

@@ -45,28 +45,25 @@ export interface FormFieldOption {
 
 export class FormFieldModel extends FormWidgetModel {
 
-    private _fieldType: string;
-    private _id: string;
-    private _name: string;
-    private _type: string;
     private _value: string;
-    private _tab: string;
 
-    get fieldType(): string {
-        return this._fieldType;
-    }
-
-    get id(): string {
-        return this._id;
-    }
-
-    get name(): string {
-        return this._name;
-    }
-
-    get type(): string {
-        return this._type;
-    }
+    fieldType: string;
+    id: string;
+    name: string;
+    type: string;
+    required: boolean;
+    readOnly: boolean;
+    overrideId: boolean;
+    tab: string;
+    colspan: number = 1;
+    options: FormFieldOption[] = [];
+    restUrl: string;
+    restResponsePath: string;
+    restIdProperty: string;
+    restLabelProperty: string;
+    hasEmptyValue: boolean;
+    className: string;
+    optionType: string;
 
     get value(): any {
         return this._value;
@@ -77,24 +74,27 @@ export class FormFieldModel extends FormWidgetModel {
         this.updateForm();
     }
 
-    get tab(): string {
-        return this._tab;
-    }
-
-    colspan: number = 1;
-    options: FormFieldOption[] = [];
-
     constructor(form: FormModel, json?: any) {
         super(form, json);
 
         if (json) {
-            this._fieldType = json.fieldType;
-            this._id = json.id;
-            this._name = json.name;
-            this._type = json.type;
-            this._tab = json.tab;
+            this.fieldType = json.fieldType;
+            this.id = json.id;
+            this.name = json.name;
+            this.type = json.type;
+            this.required = <boolean> json.required;
+            this.readOnly = <boolean> json.readOnly;
+            this.overrideId = <boolean> json.overrideId;
+            this.tab = json.tab;
+            this.restUrl = json.restUrl;
+            this.restResponsePath = json.restResponsePath;
+            this.restIdProperty = json.restIdProperty;
+            this.restLabelProperty = json.restLabelProperty;
             this.colspan = <number> json.colspan;
             this.options = <FormFieldOption[]> json.options || [];
+            this.hasEmptyValue = <boolean> json.hasEmptyValue;
+            this.className = json.className;
+            this.optionType = json.optionType;
 
             this._value = this.parseValue(json);
             this.updateForm();
@@ -118,7 +118,7 @@ export class FormFieldModel extends FormWidgetModel {
         return value;
     }
 
-    private updateForm() {
+    updateForm() {
         /*
             This is needed due to Activiti reading dropdown values as string
             but saving back as object: { id: <id>, name: <name> }