feat: add add-role component (#494)

Fixes: #487

src/app/system/roles-and-permissions/add-role/add-role.component.ts

@@ -0,0 +1,61 @@
+/** Angular Imports */
+import { Component, OnInit } from '@angular/core';
+import { FormBuilder, FormGroup, Validators } from '@angular/forms';
+import { Router, ActivatedRoute } from '@angular/router';
+
+/** Custom Services */
+import { SystemService } from '../../system.service';
+
+/**
+ * Add Role Component.
+ */
+@Component({
+  selector: 'mifosx-add-role',
+  templateUrl: './add-role.component.html',
+  styleUrls: ['./add-role.component.scss']
+})
+export class AddRoleComponent implements OnInit {
+
+  /** Role form. */
+  roleForm: FormGroup;
+
+  /**
+   * @param {FormBuilder} formBuilder Form Builder.
+   * @param {SystemService} systemService System Service.
+   * @param {ActivatedRoute} route Activated Route.
+   * @param {Router} router Router for navigation.
+   */
+  constructor(private formBuilder: FormBuilder,
+              private systemService: SystemService,
+              private route: ActivatedRoute,
+              private router: Router) { }
+
+  /**
+   * Creates the role form.
+   */
+  ngOnInit() {
+    this.createRoleForm();
+  }
+
+  /**
+   * Creates the create role form.
+   */
+  createRoleForm() {
+    this.roleForm = this.formBuilder.group({
+      'name': ['', Validators.required],
+      'description': ['', Validators.required]
+    });
+  }
+
+  /**
+   * Submits the role form and creates a role,
+   * if successful redirects back to roles and permission.
+   */
+  submit() {
+    this.systemService.createRole(this.roleForm.value)
+      .subscribe((response: any) => {
+        this.router.navigate(['../'], { relativeTo: this.route });
+    });
+  }
+
+}