add form to create employee

Reviewed-on: #18
Reviewed-by: Get in my car i have candy <huydw@proton.me>

src/app/employee/create/create.component.html

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+<h2 mat-dialog-title>Create Employee</h2>
+<mat-dialog-content>
+  <form *ngIf="employeeForm" [formGroup]="employeeForm" (ngSubmit)="submit()">
+    <div class="!space-y-4">
+      <div class="flex gap-x-4">
+        <mat-form-field class="!w-full">
+          <mat-label>First Name</mat-label>
+          <input matInput formControlName="firstName" required>
+        </mat-form-field>
+
+        <mat-form-field class="!w-full">
+          <mat-label>Last Name</mat-label>
+          <input matInput formControlName="lastName" required>
+        </mat-form-field>
+      </div>
+
+      <mat-form-field class="!w-full">
+        <mat-label>Street</mat-label>
+        <input matInput formControlName="street" required>
+      </mat-form-field>
+
+      <div class="flex gap-x-4">
+        <mat-form-field class="!w-full">
+          <mat-label>City</mat-label>
+          <input matInput formControlName="city" required>
+        </mat-form-field>
+
+        <mat-form-field class="!w-1/2">
+          <mat-label>Postcode</mat-label>
+          <input matInput formControlName="postcode" minlength="5" maxlength="5" type="number" required>
+        </mat-form-field>
+      </div>
+
+      <mat-form-field class="!w-full">
+        <mat-label>Phone</mat-label>
+        <input matInput formControlName="phone" required type="number">
+      </mat-form-field>
+
+      <mat-dialog-actions align="end">
+        <button mat-button mat-dialog-close>Cancel</button>
+        <button mat-flat-button color="primary" type="submit">Submit</button>
+      </mat-dialog-actions>
+    </div>
+  </form>
+
+</mat-dialog-content>

src/app/employee/create/create.component.ts

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+import {Component, inject, OnInit} from '@angular/core';
+import {FormBuilder, FormGroup, ReactiveFormsModule, Validators} from "@angular/forms";
+import {MatFormField, MatLabel} from "@angular/material/form-field";
+import {MatInput} from "@angular/material/input";
+import {MatButton} from "@angular/material/button";
+import {
+  MatDialogActions,
+  MatDialogClose,
+  MatDialogContent,
+  MatDialogRef,
+  MatDialogTitle
+} from "@angular/material/dialog";
+import {Employee} from "../Employee";
+import EmployeeApiService from "../../services/employee-api.service";
+import {NgIf} from "@angular/common";
+
+@Component({
+  selector: 'app-create-employee',
+  imports: [
+    ReactiveFormsModule,
+    MatFormField,
+    MatInput,
+    MatButton,
+    MatLabel,
+    MatDialogContent,
+    MatDialogTitle,
+    MatDialogActions,
+    MatDialogClose,
+    NgIf,
+  ],
+  templateUrl: './create.component.html',
+  standalone: true,
+  styleUrl: './create.component.css'
+})
+export class CreateComponent implements OnInit {
+  employeeForm: FormGroup | null = null;
+  employeeService: EmployeeApiService = inject(EmployeeApiService);
+  formBuilder: FormBuilder = inject(FormBuilder);
+  dialogRef: MatDialogRef<CreateComponent> = inject(MatDialogRef);
+
+  ngOnInit(): void {
+    this.employeeForm = this.formBuilder.group({
+      firstName: ['', Validators.required],
+      lastName: ['', Validators.required],
+      street: ['', Validators.required],
+      postcode: ['', [Validators.required, Validators.minLength(5), Validators.maxLength(5)]],
+      city: ['', Validators.required],
+      phone: ['', Validators.required],
+    });
+  }
+
+  submit() {
+    if (this.employeeForm === null || !this.employeeForm.valid) {
+      console.error('Form invalid');
+      return;
+    }
+
+    this.employeeService.create(this.employeeForm.value as Employee).subscribe();
+    this.dialogRef.close();
+  }
+}