Drawings can communicate with server after dragged

src/app/app.module.ts

@@ -67,6 +67,7 @@ import { CreateSnapshotDialogComponent } from './components/snapshots/create-sna
 import { SnapshotsComponent } from './components/snapshots/snapshots.component';
 import { SnapshotMenuItemComponent } from './components/snapshots/snapshot-menu-item/snapshot-menu-item.component';
 import { MATERIAL_IMPORTS } from './material.imports';
+import { DrawingService } from './services/drawing.service';
 
 
 if (environment.production) {
@@ -131,6 +132,7 @@ if (environment.production) {
     ApplianceService,
     NodeService,
     LinkService,
+    DrawingService,
     IndexedDbService,
     HttpServer,
     SnapshotService,

src/app/cartography/cartography.module.ts

@@ -16,7 +16,11 @@ import { MapChangeDetectorRef } from './services/map-change-detector-ref';
 import { Context } from './models/context';
 import { D3_MAP_IMPORTS } from './d3-map.imports';
 import { CanvasSizeDetector } from './helpers/canvas-size-detector';
-import { MapListener } from './listeners/map-listener';
+import { MapListeners } from './listeners/map-listeners';
+import { DrawingsDraggableListener } from './listeners/drawings-draggable-listener';
+import { NodesDraggableListener } from './listeners/nodes-draggable-listener';
+import { DrawingsEventSource } from './events/drawings-event-source';
+import { NodesEventSource } from './events/nodes-event-source';
 
 
 @NgModule({
@@ -40,7 +44,11 @@ import { MapListener } from './listeners/map-listener';
     MapChangeDetectorRef,
     CanvasSizeDetector,
     Context,
-    MapListener,
+    MapListeners,
+    DrawingsDraggableListener,
+    NodesDraggableListener,
+    DrawingsEventSource,
+    NodesEventSource,
     ...D3_MAP_IMPORTS
   ],
   exports: [ MapComponent ]

src/app/cartography/components/map/map.component.ts

@@ -20,9 +20,11 @@ import { MapChangeDetectorRef } from '../../services/map-change-detector-ref';
 import { NodeDragging, NodeDragged, NodeClicked } from '../../events/nodes';
 import { LinkCreated } from '../../events/links';
 import { CanvasSizeDetector } from '../../helpers/canvas-size-detector';
-import { SelectionManager } from '../../managers/selection-manager';
 import { NodeWidget } from '../../widgets/node';
-import { MapListener } from '../../listeners/map-listener';
+import { MapListeners } from '../../listeners/map-listeners';
+import { DraggedDataEvent } from '../../events/event-source';
+import { NodesEventSource } from '../../events/nodes-event-source';
+import { DrawingsEventSource } from '../../events/drawings-event-source';
 
 
 @Component({
@@ -39,16 +41,13 @@ export class MapComponent implements OnInit, OnChanges, OnDestroy {
   @Input() width = 1500;
   @Input() height = 600;
 
-  @Output() onNodeDragged = new EventEmitter<NodeDragged>();
+  @Output() nodeDragged: EventEmitter<DraggedDataEvent<Node>>;
+  @Output() drawingDragged: EventEmitter<DraggedDataEvent<Drawing>>;
   @Output() onLinkCreated = new EventEmitter<LinkCreated>();
 
   private parentNativeElement: any;
   private svg: Selection<SVGSVGElement, any, null, undefined>;
 
-  private onNodeDraggingSubscription: Subscription;
-  private onNodeClickedSubscription: Subscription;
-  private onNodeDraggedSubscription: Subscription;
-
   private onChangesDetected: Subscription;
 
   protected settings = {
@@ -59,8 +58,7 @@ export class MapComponent implements OnInit, OnChanges, OnDestroy {
     private context: Context,
     private mapChangeDetectorRef: MapChangeDetectorRef,
     private canvasSizeDetector: CanvasSizeDetector,
-    private mapListener: MapListener,
-    private selectionManager: SelectionManager,
+    private mapListeners: MapListeners,
     protected element: ElementRef,
     protected nodesWidget: NodesWidget,
     protected nodeWidget: NodeWidget,
@@ -68,9 +66,13 @@ export class MapComponent implements OnInit, OnChanges, OnDestroy {
     protected interfaceLabelWidget: InterfaceLabelWidget,
     protected selectionToolWidget: SelectionTool,
     protected movingToolWidget: MovingTool,
-    public graphLayout: GraphLayout
+    public graphLayout: GraphLayout,
+    nodesEventSource: NodesEventSource,
+    drawingsEventSource: DrawingsEventSource,
     ) {
     this.parentNativeElement = element.nativeElement;
+    this.nodeDragged = nodesEventSource.dragged;
+    this.drawingDragged = drawingsEventSource.dragged;
   }
 
   @Input('show-interface-labels') 
@@ -118,67 +120,25 @@ export class MapComponent implements OnInit, OnChanges, OnDestroy {
     }
   }
 
-  ngOnDestroy() {
-    this.graphLayout.disconnect(this.svg);
-    this.onNodeDraggingSubscription.unsubscribe();
-    this.onNodeClickedSubscription.unsubscribe();
-    this.onNodeDraggedSubscription.unsubscribe();
-    this.onChangesDetected.unsubscribe();
-    this.mapListener.onDestroy();
-  }
-
   ngOnInit() {
     if (this.parentNativeElement !== null) {
       this.createGraph(this.parentNativeElement);
     }
     this.context.size = this.getSize();
 
-    this.onNodeDraggingSubscription = this.nodeWidget.onNodeDragging.subscribe((eventNode: NodeDragging) => {
-      let nodes = this.selectionManager.getSelectedNodes();
-      
-      if (nodes.filter((n: Node) => n.node_id === eventNode.node.node_id).length === 0) {
-        this.selectionManager.setSelectedNodes([eventNode.node]);
-        nodes = this.selectionManager.getSelectedNodes();
-      }
-
-      nodes.forEach((node: Node) => {
-        node.x += eventNode.event.dx;
-        node.y += eventNode.event.dy;
-
-        this.nodesWidget.redrawNode(this.svg, node);
-        const links = this.links.filter((link) => link.target.node_id === node.node_id || link.source.node_id === node.node_id);
-        links.forEach((link) => {
-          this.linksWidget.redrawLink(this.svg, link);
-        });
-      });
-
-    });
-
-    this.onNodeDraggedSubscription = this.nodeWidget.onNodeDragged.subscribe((eventNode: NodeDragged) => {
-      let nodes = this.selectionManager.getSelectedNodes();
-      
-      if (nodes.filter((n: Node) => n.node_id === eventNode.node.node_id).length === 0) {
-        this.selectionManager.setSelectedNodes([eventNode.node]);
-        nodes = this.selectionManager.getSelectedNodes();
-      }
-
-      nodes.forEach((node) => {
-        this.onNodeDragged.emit(new NodeDragged(eventNode.event, node));
-      });
-      
-    });
-
-    this.onNodeClickedSubscription = this.nodeWidget.onNodeClicked.subscribe((nodeClickedEvent: NodeClicked) => {
-      this.selectionManager.setSelectedNodes([nodeClickedEvent.node]);
-    });
-
     this.onChangesDetected = this.mapChangeDetectorRef.changesDetected.subscribe(() => {
       if (this.mapChangeDetectorRef.hasBeenDrawn) {
         this.reload();
       }
     });
 
-    this.mapListener.onInit(this.svg);
+    this.mapListeners.onInit(this.svg);
+  }
+
+  ngOnDestroy() {
+    this.graphLayout.disconnect(this.svg);
+    this.onChangesDetected.unsubscribe();
+    this.mapListeners.onDestroy();
   }
 
   public createGraph(domElement: HTMLElement) {

src/app/cartography/events/draggable.ts

@@ -3,6 +3,8 @@ import { drag, DraggedElementBaseType } from "d3-drag";
 import { event } from "d3-selection";
 
 class DraggableEvent {
+  public x: number;
+  public y: number;
   public dx: number;
   public dy: number;
 }
@@ -46,18 +48,24 @@ export class Draggable<GElement extends DraggedElementBaseType, Datum> {
         const evt = new DraggableStart<Datum>(datum);
         evt.dx = event.dx;
         evt.dy = event.dy;
+        evt.x = event.x;
+        evt.y = event.y;
         this.start.emit(evt);
       })
       .on('drag', (datum: Datum) => {
         const evt = new DraggableDrag<Datum>(datum);
         evt.dx = event.dx;
         evt.dy = event.dy;
+        evt.x = event.x;
+        evt.y = event.y;
         this.drag.emit(evt);
       })
       .on('end', (datum: Datum) => {
         const evt = new DraggableEnd<Datum>(datum);
         evt.dx = event.dx;
         evt.dy = event.dy;
+        evt.x = event.x;
+        evt.y = event.y;
         this.end.emit(evt);
       });
   }

src/app/cartography/events/drawings-event-source.ts

@@ -0,0 +1,9 @@
+import { Injectable, EventEmitter } from "@angular/core";
+import { Drawing } from "../models/drawing";
+import { DraggedDataEvent } from "./event-source";
+
+
+@Injectable()
+export class DrawingsEventSource {
+  public dragged = new EventEmitter<DraggedDataEvent<Drawing>>();
+}

src/app/cartography/events/event-source.ts

@@ -0,0 +1,9 @@
+export class DataEventSource<T> {
+  constructor(
+    public datum: T
+  ) {}
+}
+
+
+// class CreatedDataEvent<T> extends DataEventSource<T> {}
+export class DraggedDataEvent<T> extends DataEventSource<T> {}

src/app/cartography/events/nodes-event-source.ts

@@ -0,0 +1,9 @@
+import { Injectable, EventEmitter } from "@angular/core";
+import { Node } from "../models/node";
+import { DraggedDataEvent } from "./event-source";
+
+
+@Injectable()
+export class NodesEventSource {
+  public dragged = new EventEmitter<DraggedDataEvent<Node>>();
+}

src/app/cartography/listeners/drawings-draggable-listener.ts

@@ -0,0 +1,55 @@
+import { Injectable } from "@angular/core";
+import { DrawingsWidget } from "../widgets/drawings";
+import { DraggableStart } from "../events/draggable";
+import { Drawing } from "../models/drawing";
+import { Subscription } from "rxjs";
+import { SelectionManager } from "../managers/selection-manager";
+import { DrawingsEventSource } from "../events/drawings-event-source";
+import { DraggedDataEvent } from "../events/event-source";
+
+
+@Injectable()
+export class DrawingsDraggableListener {
+  private start: Subscription;
+  private drag: Subscription;
+  private end: Subscription;
+
+  constructor(
+    private drawingsWidget: DrawingsWidget,
+    private selectionManager: SelectionManager,
+    private drawingsEventSource: DrawingsEventSource
+  ) {
+  }
+
+  public onInit(svg: any) {
+    this.start = this.drawingsWidget.draggable.start.subscribe((evt: DraggableStart<Drawing>) => {
+      let drawings = this.selectionManager.getSelectedDrawings();
+      if (drawings.filter((n: Drawing) => n.drawing_id === evt.datum.drawing_id).length === 0) {
+        this.selectionManager.setSelectedDrawings([evt.datum]);
+        drawings = this.selectionManager.getSelectedDrawings();
+      }
+    });
+
+    this.drag = this.drawingsWidget.draggable.drag.subscribe((evt: DraggableStart<Drawing>) => {
+      let drawings = this.selectionManager.getSelectedDrawings();
+      drawings.forEach((drawing: Drawing) => {
+        drawing.x += evt.dx;
+        drawing.y += evt.dy;
+        this.drawingsWidget.redrawDrawing(svg, drawing);
+      });
+    });
+
+    this.end = this.drawingsWidget.draggable.end.subscribe((evt: DraggableStart<Drawing>) => {
+      let drawings = this.selectionManager.getSelectedDrawings();
+      drawings.forEach((drawing: Drawing) => {
+        this.drawingsEventSource.dragged.emit(new DraggedDataEvent<Drawing>(drawing));
+      });
+    });
+  }
+
+  public onDestroy() {
+    this.start.unsubscribe();
+    this.drag.unsubscribe();
+    this.end.unsubscribe();
+  }
+}

src/app/cartography/listeners/map-listener.ts

@@ -1,53 +1,4 @@
-import { Injectable } from "@angular/core";
-import { DrawingsWidget } from "../widgets/drawings";
-import { DraggableStart } from "../events/draggable";
-import { Drawing } from "../models/drawing";
-import { Subscription } from "rxjs";
-import { SelectionManager } from "../managers/selection-manager";
-
-
-@Injectable()
-export class MapListener {
-  private start: Subscription;
-  private drag: Subscription;
-  private end: Subscription;
-
-  constructor(
-    private drawingsWidget: DrawingsWidget,
-    private selectionManager: SelectionManager
-  ) {
-  }
-
-  public onInit(svg: any) {
-    this.start = this.drawingsWidget.draggable.start.subscribe((evt: DraggableStart<Drawing>) => {
-      let drawings = this.selectionManager.getSelectedDrawings();
-      
-      if (drawings.filter((n: Drawing) => n.drawing_id === evt.datum.drawing_id).length === 0) {
-        this.selectionManager.setSelectedDrawings([evt.datum]);
-        drawings = this.selectionManager.getSelectedDrawings();
-      }
-    });
-
-    this.drag = this.drawingsWidget.draggable.drag.subscribe((evt: DraggableStart<Drawing>) => {
-      let drawings = this.selectionManager.getSelectedDrawings();
-      drawings.forEach((drawing: Drawing) => {
-        drawing.x += evt.dx;
-        drawing.y += evt.dy;
-        this.drawingsWidget.redrawDrawing(svg, drawing);
-      });
-    });
-
-    this.end = this.drawingsWidget.draggable.end.subscribe((evt: DraggableStart<Drawing>) => {
-      let drawings = this.selectionManager.getSelectedDrawings();
-      drawings.forEach((drawing: Drawing) => {
-        
-      });
-    });
-  }
-
-  public onDestroy() {
-    this.start.unsubscribe();
-    this.drag.unsubscribe();
-    this.end.unsubscribe();
-  }
+export interface MapListener {
+  onInit(svg: any);
+  onDestroy();
 }

src/app/cartography/listeners/map-listeners.ts

@@ -0,0 +1,29 @@
+import { Injectable } from "@angular/core";
+import { MapListener } from "./map-listener";
+import { DrawingsDraggableListener } from "./drawings-draggable-listener";
+import { NodesDraggableListener } from "./nodes-draggable-listener";
+
+
+@Injectable()
+export class MapListeners {
+  private listeners: MapListener[] = [];
+  constructor(
+    private drawingsDraggableListener: DrawingsDraggableListener,
+    private nodesDraggableListener: NodesDraggableListener
+  ) {
+    this.listeners.push(this.drawingsDraggableListener);
+    this.listeners.push(this.nodesDraggableListener);
+  }
+
+  public onInit(svg: any) {
+    this.listeners.forEach((listener) => {
+      listener.onInit(svg);
+    });
+  }
+
+  public onDestroy() {
+    this.listeners.forEach((listener) => {
+      listener.onDestroy();
+    });
+  }
+}

src/app/cartography/listeners/nodes-draggable-listener.ts

@@ -0,0 +1,64 @@
+import { Injectable } from "@angular/core";
+import { NodesWidget } from "../widgets/nodes";
+import { DraggableStart } from "../events/draggable";
+import { Node } from "../models/node";
+import { Subscription } from "rxjs";
+import { SelectionManager } from "../managers/selection-manager";
+import { LinksWidget } from "../widgets/links";
+import { GraphLayout } from "../widgets/graph-layout";
+import { NodesEventSource } from "../events/nodes-event-source";
+import { DraggedDataEvent } from "../events/event-source";
+
+
+@Injectable()
+export class NodesDraggableListener {
+  private start: Subscription;
+  private drag: Subscription;
+  private end: Subscription;
+
+  constructor(
+    private nodesWidget: NodesWidget,
+    private linksWidget: LinksWidget,
+    private selectionManager: SelectionManager,
+    private graphLayout: GraphLayout,
+    private nodesEventSource: NodesEventSource
+  ) {
+  }
+
+  public onInit(svg: any) {
+    this.start = this.nodesWidget.draggable.start.subscribe((evt: DraggableStart<Node>) => {
+      let nodes = this.selectionManager.getSelectedNodes();
+      if (nodes.filter((n: Node) => n.node_id === evt.datum.node_id).length === 0) {
+        this.selectionManager.setSelectedNodes([evt.datum]);
+        nodes = this.selectionManager.getSelectedNodes();
+      }
+    });
+
+    this.drag = this.nodesWidget.draggable.drag.subscribe((evt: DraggableStart<Node>) => {
+      let nodes = this.selectionManager.getSelectedNodes();
+      nodes.forEach((node: Node) => {
+        node.x += evt.dx;
+        node.y += evt.dy;
+        this.nodesWidget.redrawNode(svg, node);
+
+        const links = this.graphLayout.getLinks().filter((link) => link.target.node_id === node.node_id || link.source.node_id === node.node_id);
+        links.forEach((link) => {
+          this.linksWidget.redrawLink(svg, link);
+        });
+      });
+    });
+
+    this.end = this.nodesWidget.draggable.end.subscribe((evt: DraggableStart<Node>) => {
+      let nodes = this.selectionManager.getSelectedNodes();
+      nodes.forEach((node: Node) => {
+        this.nodesEventSource.dragged.emit(new DraggedDataEvent<Node>(node));
+      });
+    });
+  }
+
+  public onDestroy() {
+    this.start.unsubscribe();
+    this.drag.unsubscribe();
+    this.end.unsubscribe();
+  }
+}

src/app/cartography/widgets/graph-layout.ts

@@ -36,6 +36,10 @@ export class GraphLayout implements Widget {
     this.links = links;
   }
 
+  public getLinks() {
+    return this.links;
+  }
+
   public setDrawings(drawings: Drawing[]) {
     this.drawings = drawings;
   }

src/app/cartography/widgets/node.ts

@@ -118,23 +118,5 @@ export class NodeWidget implements Widget {
           }
           return n.label.y + bbox.height - NodeWidget.NODE_LABEL_MARGIN;
         });
-  
-    const callback = function (this: SVGGElement, n: Node) {
-      const e: D3DragEvent<SVGGElement, Node, Node> = event;
-      self.onNodeDragging.emit(new NodeDragging(e, n));
-    };
-
-    const dragging = () => {
-      return drag<SVGGElement, Node>()
-        .on('drag', callback)
-        .on('end', (n: Node) => {
-          const e: D3DragEvent<SVGGElement, Node, Node> = event;
-          self.onNodeDragged.emit(new NodeDragged(e, n));
-        });
-    };
-
-    if (this.draggingEnabled) {
-      node_body_merge.call(dragging());
-    }
   }
 }

src/app/cartography/widgets/nodes.ts

@@ -5,12 +5,15 @@ import { Node } from "../models/node";
 import { SVGSelection } from "../models/types";
 import { Layer  } from "../models/layer";
 import { NodeWidget } from "./node";
+import { Draggable } from "../events/draggable";
 
 
 @Injectable()
 export class NodesWidget implements Widget {
   static NODE_LABEL_MARGIN = 3;
 
+  public draggable = new Draggable<SVGGElement, Node>();
+  
   constructor(
     private nodeWidget: NodeWidget
   ) {
@@ -44,6 +47,8 @@ export class NodesWidget implements Widget {
     node
       .exit()
         .remove();
+
+    this.draggable.call(merge);
   }
 
   private selectNode(view: SVGSelection, node: Node) {

src/app/components/project-map/project-map.component.html

@@ -10,7 +10,8 @@
     [selection-tool]="tools.selection"
     [moving-tool]="tools.moving"
     [draw-link-tool]="tools.draw_link"
-    (onNodeDragged)="onNodeDragged($event)"
+    (nodeDragged)="onNodeDragged($event)"
+    (drawingDragged)="onDrawingDragged($event)"
     (onLinkCreated)="onLinkCreated($event)"
   ></app-map>
   <div class="project-toolbar">

src/app/components/project-map/project-map.component.ts

@@ -30,6 +30,8 @@ import { MapChangeDetectorRef } from '../../cartography/services/map-change-dete
 import { NodeContextMenu, NodeDragged } from '../../cartography/events/nodes';
 import { LinkCreated } from '../../cartography/events/links';
 import { NodeWidget } from '../../cartography/widgets/node';
+import { DraggedDataEvent } from '../../cartography/events/event-source';
+import { DrawingService } from '../../services/drawing.service';
 
 
 @Component({
@@ -70,6 +72,7 @@ export class ProjectMapComponent implements OnInit, OnDestroy {
     private symbolService: SymbolService,
     private nodeService: NodeService,
     private linkService: LinkService,
+    private drawingService: DrawingService,
     private progressService: ProgressService,
     private projectWebServiceHandler: ProjectWebServiceHandler,
     private mapChangeDetectorRef: MapChangeDetectorRef,
@@ -216,12 +219,21 @@ export class ProjectMapComponent implements OnInit, OnDestroy {
       });
   }
 
-  onNodeDragged(nodeEvent: NodeDragged) {
-    this.nodesDataSource.update(nodeEvent.node);
+  onNodeDragged(draggedEvent: DraggedDataEvent<Node>) {
+    this.nodesDataSource.update(draggedEvent.datum);
     this.nodeService
-      .updatePosition(this.server, nodeEvent.node, nodeEvent.node.x, nodeEvent.node.y)
-      .subscribe((n: Node) => {
-        this.nodesDataSource.update(n);
+      .updatePosition(this.server, draggedEvent.datum, draggedEvent.datum.x, draggedEvent.datum.y)
+      .subscribe((node: Node) => {
+        this.nodesDataSource.update(node);
+      });
+  }
+
+  onDrawingDragged(draggedEvent: DraggedDataEvent<Drawing>) {
+    this.drawingsDataSource.update(draggedEvent.datum);
+    this.drawingService
+      .updatePosition(this.server, draggedEvent.datum, draggedEvent.datum.x, draggedEvent.datum.y)
+      .subscribe((drawing: Drawing) => {
+        this.drawingsDataSource.update(drawing);
       });
   }
 

src/app/services/drawing.service.spec.ts

@@ -0,0 +1,95 @@
+import { TestBed, inject } from '@angular/core/testing';
+
+import { HttpClient } from '@angular/common/http';
+import { HttpTestingController, HttpClientTestingModule } from '@angular/common/http/testing';
+import { HttpServer } from './http-server.service';
+import { Server } from '../models/server';
+import { Drawing } from '../cartography/models/drawing';
+import { getTestServer } from './testing';
+import { DrawingService } from './drawing.service';
+import { AppTestingModule } from "../testing/app-testing/app-testing.module";
+
+
+describe('DrawingService', () => {
+  let httpClient: HttpClient;
+  let httpTestingController: HttpTestingController;
+  let httpServer: HttpServer;
+  let service: DrawingService;
+  let server: Server;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      imports: [
+        HttpClientTestingModule,
+        AppTestingModule
+      ],
+      providers: [
+        HttpServer,
+        DrawingService
+      ]
+    });
+
+    httpClient = TestBed.get(HttpClient);
+    httpTestingController = TestBed.get(HttpTestingController);
+    httpServer = TestBed.get(HttpServer);
+    service = TestBed.get(DrawingService);
+    server = getTestServer();
+  });
+
+  afterEach(() => {
+    httpTestingController.verify();
+  });
+
+  it('should be created', inject([DrawingService], (service: DrawingService) => {
+    expect(service).toBeTruthy();
+  }));
+
+  it('should updatePosition of drawing', inject([DrawingService], (service: DrawingService) => {
+    const drawing = new Drawing();
+    drawing.project_id = "myproject";
+    drawing.drawing_id = "id";
+
+    service.updatePosition(server, drawing, 10, 20).subscribe();
+
+    const req = httpTestingController.expectOne(
+      'http://127.0.0.1:3080/v2/projects/myproject/drawings/id');
+    expect(req.request.method).toEqual("PUT");
+    expect(req.request.body).toEqual({
+      'x': 10,
+      'y': 20
+    });
+  }));
+
+  it('should update drawing', inject([DrawingService], (service: DrawingService) => {
+    const drawing = new Drawing();
+    drawing.project_id = "myproject";
+    drawing.drawing_id = "id";
+    drawing.x = 10;
+    drawing.y = 20;
+    drawing.z = 30;
+
+    service.update(server, drawing).subscribe();
+
+    const req = httpTestingController.expectOne(
+      'http://127.0.0.1:3080/v2/projects/myproject/drawings/id');
+    expect(req.request.method).toEqual("PUT");
+    expect(req.request.body).toEqual({
+      'x': 10,
+      'y': 20,
+      'z': 30
+    });
+  }));
+
+  it('should delete drawing', inject([DrawingService], (service: DrawingService) => {
+    const drawing = new Drawing();
+    drawing.project_id = "myproject";
+    drawing.drawing_id = "id";
+
+    service.delete(server, drawing).subscribe();
+
+    const req = httpTestingController.expectOne(
+      'http://127.0.0.1:3080/v2/projects/myproject/drawings/id');
+    expect(req.request.method).toEqual("DELETE");
+  }));
+
+});

src/app/services/drawing.service.ts

@@ -0,0 +1,36 @@
+import { Injectable } from '@angular/core';
+import { Drawing } from '../cartography/models/drawing';
+import { Observable } from 'rxjs';
+
+import 'rxjs/add/operator/map';
+import { Server } from "../models/server";
+import { HttpServer } from "./http-server.service";
+
+
+@Injectable()
+export class DrawingService {
+
+  constructor(private httpServer: HttpServer) { }
+
+  updatePosition(server: Server, drawing: Drawing, x: number, y: number): Observable<Drawing> {
+    return this.httpServer
+      .put<Drawing>(server, `/projects/${drawing.project_id}/drawings/${drawing.drawing_id}`, {
+        'x': x,
+        'y': y
+      });
+  }
+
+  update(server: Server, drawing: Drawing): Observable<Drawing> {
+    return this.httpServer
+      .put<Drawing>(server, `/projects/${drawing.project_id}/drawings/${drawing.drawing_id}`, {
+        'x': drawing.x,
+        'y': drawing.y,
+        'z': drawing.z
+      });
+  }
+
+  delete(server: Server, drawing: Drawing) {
+    return this.httpServer.delete<Drawing>(server, `/projects/${drawing.project_id}/drawings/${drawing.drawing_id}`);
+  }
+
+}