Dialog for changing hostname added

src/app/components/project-map/change-hostname-dialog/change-hostname-dialog.component.html

@@ -0,0 +1,24 @@
+<h1 mat-dialog-title>Change hostname for node {{name}}</h1>
+
+<div class="modal-form-container">
+    <div class="content">
+        <div class="default-content">
+            <mat-card class="matCard">
+                <form [formGroup]="inputForm">
+                    <mat-form-field class="form-field">
+                        <input 
+                            matInput type="text" 
+                            [(ngModel)]="node.name" 
+                            formControlName="name"
+                            placeholder="Name">
+                    </mat-form-field>
+                </form>
+            </mat-card>
+        </div>
+    </div>
+</div>
+
+<div mat-dialog-actions>
+  <button mat-button (click)="onCancelClick()" color="accent">Cancel</button>
+  <button mat-button (click)="onSaveClick()" tabindex="2" mat-raised-button color="primary">Apply</button>
+</div>

src/app/components/project-map/change-hostname-dialog/change-hostname-dialog.component.scss

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+.form-field {
+    width: 100%;
+}

src/app/components/project-map/change-hostname-dialog/change-hostname-dialog.component.ts

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+import { Component, OnInit, Input } from "@angular/core";
+import { FormBuilder, FormGroup, Validators, FormControl } from '@angular/forms';
+import { Node } from '../../../cartography/models/node';
+import { Server } from '../../../models/server';
+import { NodeService } from '../../../services/node.service';
+import { ToasterService } from '../../../services/toaster.service';
+import { MatDialogRef } from '@angular/material';
+
+
+@Component({
+    selector: 'app-change-hostname-dialog-component',
+    templateUrl: './change-hostname-dialog.component.html',
+    styleUrls: ['./change-hostname-dialog.component.scss']
+})
+export class ChangeHostnameDialogComponent implements OnInit {
+    server: Server;
+    node: Node;
+    inputForm: FormGroup;
+    name: string;
+
+    constructor(
+        public dialogRef: MatDialogRef<ChangeHostnameDialogComponent>,
+        public nodeService: NodeService,
+        private toasterService: ToasterService,
+        private formBuilder: FormBuilder
+    ) {
+        this.inputForm = this.formBuilder.group({
+            name: new FormControl('', Validators.required)
+        });
+    }
+
+    ngOnInit() {
+        this.nodeService.getNode(this.server, this.node).subscribe((node: Node) => {
+            this.node = node;
+            this.name = this.node.name;
+        })
+    }
+
+    onSaveClick() {
+        if (this.inputForm.valid) {
+            this.nodeService.updateNode(this.server, this.node).subscribe(() => {
+                this.toasterService.success(`Node ${this.node.name} updated.`);
+                this.onCancelClick();
+            });
+        } else {
+            this.toasterService.error(`Fill all required fields.`);
+        }
+    }
+
+    onCancelClick() {
+        this.dialogRef.close();
+    }
+}