frontend/src/app/pages/event-root/create-event/create-event.component.html

@@ -21,7 +21,7 @@
   <div class="flex-grow overflow-y-auto px-4 sm:px-8 py-8">
     <div class="w-full max-w-4xl mx-auto">
       @if (currentStep() === 0) {
-        <app-basic-step></app-basic-step>
+        <app-basic-step [form]="form"></app-basic-step>
       }
       @if (currentStep() === 1) {
         <app-tickets-step></app-tickets-step>

frontend/src/app/pages/event-root/create-event/create-event.component.ts

@@ -4,8 +4,8 @@ import {
   ChangeDetectionStrategy,
   signal,
   WritableSignal,
-  OnInit,
 } from '@angular/core';
+import { FormBuilder, FormGroup, Validators } from '@angular/forms';
 
 import { BasicStepComponent } from './steps/basic-step.component';
 import { TicketsStepComponent } from './steps/tickets-step.component';
@@ -18,13 +18,19 @@ import { TicketsStepComponent } from './steps/tickets-step.component';
   templateUrl: './create-event.component.html',
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
-export class CreateEventComponent implements OnInit {
+export class CreateEventComponent {
   public currentStep: WritableSignal<number> = signal(0);
   public readonly steps: string[] = ['Basic', 'Tickets', 'Review'];
+  public form!: FormGroup;
 
-  public constructor() {}
-
-  public ngOnInit(): void {}
+  public constructor(private readonly formBuilder: FormBuilder) {
+    this.form = this.formBuilder.group({
+      eventTitle: ['', [Validators.required, Validators.minLength(3)]],
+      eventLocation: ['', Validators.required],
+      eventDate: ['', Validators.required],
+      eventTime: ['', Validators.required],
+    });
+  }
 
   public getStepContent(index: number): string {
     if (index < this.currentStep()) {

frontend/src/app/pages/event-root/create-event/steps/basic-step.component.html

@@ -1,4 +1,4 @@
-<form class="flex flex-col">
+<form [formGroup]="form()" class="flex flex-col">
   <h1 class="text-2xl font-bold mb-6">Event Basic Information</h1>
 
   <label class="form-control w-full mb-4">
@@ -7,6 +7,8 @@
       <span class="label-text-alt">Make it catchy and descriptive</span>
     </div>
     <input
+      formControlName="eventTitle"
+      [ngClass]="getInputClass('eventTitle')"
       type="text"
       placeholder="Enter your event title"
       class="input input-bordered w-full" />
@@ -18,6 +20,7 @@
 
   <div class="form-control w-full">
     <app-dropdown
+      formControlName="eventLocation"
       label="Event Location"
       placeholder="Search for a Location"
       hintTopRight="Select or create a new Location by using the dropdown"
@@ -34,7 +37,12 @@
         <span class="label-text">Date</span>
         <span class="label-text-alt">Select the event date</span>
       </div>
-      <input type="date" id="event-date" class="input input-bordered w-full" />
+      <input
+        formControlName="eventDate"
+        [ngClass]="getInputClass('eventDate')"
+        type="date"
+        id="event-date"
+        class="input input-bordered w-full" />
       <div class="label">
         <span class="label-text-alt"></span>
         <span class="label-text-alt"></span>
@@ -46,12 +54,21 @@
         <span class="label-text">Time</span>
         <span class="label-text-alt">Choose the event time</span>
       </div>
-      <input type="time" id="event-time" class="input input-bordered w-full" />
+      <input
+        formControlName="eventTime"
+        [ngClass]="getInputClass('eventTime')"
+        type="time"
+        id="event-time"
+        class="input input-bordered w-full" />
       <div class="label">
         <span class="label-text-alt"></span>
         <span class="label-text-alt"></span>
       </div>
     </label>
+
+    <div>
+      <pre>{{ form().value | json }}</pre>
+    </div>
   </div>
 </form>
 

frontend/src/app/pages/event-root/create-event/steps/basic-step.component.ts

@@ -1,6 +1,12 @@
 import { CommonModule } from '@angular/common';
-import { ChangeDetectionStrategy, Component, ViewChild } from '@angular/core';
-import { FormsModule } from '@angular/forms';
+import {
+  ChangeDetectionStrategy,
+  Component,
+  InputSignal,
+  ViewChild,
+  input,
+} from '@angular/core';
+import { FormGroup, FormsModule, ReactiveFormsModule } from '@angular/forms';
 
 import { DropdownComponent } from '../../../../shared/components/dropdown/dropdown.component';
 import {
@@ -18,6 +24,7 @@ import {
     FormsModule,
     DropdownComponent,
     LocationDialogComponent,
+    ReactiveFormsModule,
   ],
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
@@ -25,6 +32,7 @@ export class BasicStepComponent {
   @ViewChild(LocationDialogComponent)
   public locationModal!: LocationDialogComponent;
   public items: string[] = ['Nachtigal Köln'];
+  public form: InputSignal<FormGroup> = input.required<FormGroup>();
 
   public constructor() {}
 
@@ -32,8 +40,17 @@ export class BasicStepComponent {
     this.openLocationModal();
   }
 
+  public getInputClass(controlName: string): string {
+    const control = this.form().get(controlName);
+
+    if (control?.touched) {
+      return control.valid ? 'input-success' : 'input-error';
+    }
+    return '';
+  }
+
   public onLocationSubmit(location: EventLocation): void {
-    console.log(location);
+    //TODO: save location
   }
 
   private openLocationModal(): void {

frontend/src/app/shared/components/dropdown/dropdown.component.html

@@ -1,4 +1,4 @@
-<div class="form-control w-full mb-4">
+<label class="form-control w-full mb-4">
   <div class="label">
     <span class="label-text">{{ label() }}</span>
     <span class="label-text-alt">
@@ -6,7 +6,9 @@
     </span>
   </div>
   <div class="relative">
-    <label class="input input-bordered flex items-center gap-2">
+    <label
+      [ngClass]="getInputClass()"
+      class="input input-bordered flex items-center gap-2">
       <input
         type="text"
         [placeholder]="placeholder()"
@@ -14,6 +16,7 @@
         (focus)="onFocus()"
         (blur)="onBlur()"
         (input)="onInput($event)"
+        (keyup.backspace)="onInputClear()"
         [(ngModel)]="searchTerm" />
       <svg
         xmlns="http://www.w3.org/2000/svg"
@@ -112,4 +115,4 @@
     <span class="label-text-alt">{{ hintBottomLeft() }}</span>
     <span class="label-text-alt">{{ hintBottomRight() }}</span>
   </div>
-</div>
+</label>

frontend/src/app/shared/components/dropdown/dropdown.component.ts

@@ -1,6 +1,7 @@
 import { CommonModule } from '@angular/common';
 import {
   Component,
+  forwardRef,
   input,
   InputSignal,
   output,
@@ -8,15 +9,35 @@ import {
   signal,
   WritableSignal,
 } from '@angular/core';
-import { FormsModule } from '@angular/forms';
+import {
+  AbstractControl,
+  ControlValueAccessor,
+  FormsModule,
+  NG_VALIDATORS,
+  NG_VALUE_ACCESSOR,
+  ValidationErrors,
+  Validator,
+} from '@angular/forms';
 
 @Component({
   selector: 'app-dropdown',
   templateUrl: './dropdown.component.html',
   standalone: true,
   imports: [CommonModule, FormsModule],
+  providers: [
+    {
+      provide: NG_VALUE_ACCESSOR,
+      useExisting: forwardRef(() => DropdownComponent),
+      multi: true,
+    },
+    {
+      provide: NG_VALIDATORS,
+      useExisting: forwardRef(() => DropdownComponent),
+      multi: true,
+    },
+  ],
 })
-export class DropdownComponent {
+export class DropdownComponent implements ControlValueAccessor, Validator {
   public label: InputSignal<string> = input.required<string>();
   public placeholder: InputSignal<string> = input.required<string>();
   public items: InputSignal<string[]> = input.required<string[]>();
@@ -37,6 +58,36 @@ export class DropdownComponent {
   public submitNewItems: OutputEmitterRef<boolean> = output<boolean>();
   public itemEdit: OutputEmitterRef<string> = output<string>();
 
+  public writeValue(value: string | null): void {
+    if (value && this.isValidOption(value)) {
+      this.searchTerm.set(value);
+      this.selectedItem.set(value);
+    } else {
+      this.searchTerm.set('');
+      this.selectedItem.set(null);
+    }
+  }
+
+  public registerOnChange(fn: (value: string) => void): void {
+    this.onChange = fn;
+  }
+
+  public registerOnTouched(fn: () => void): void {
+    this.onTouched = fn;
+  }
+
+  public validate(control: AbstractControl): ValidationErrors | null {
+    const value = control.value;
+
+    if (this.required() && (!value || value.trim().length === 0)) {
+      return { required: true };
+    }
+    if (value && value.trim().length > 0 && !this.isValidOption(value)) {
+      return { invalidOption: true };
+    }
+    return null;
+  }
+
   public onInput(event: Event): void {
     const value = (event.target as HTMLInputElement).value;
 
@@ -54,13 +105,30 @@ export class DropdownComponent {
 
     if (exactMatch) {
       this.selectedItem.set(exactMatch);
+      this.onChange(exactMatch);
       this.itemSelected.emit(exactMatch);
     } else {
       this.selectedItem.set(null);
+      this.onChange('');
       this.itemSelected.emit('');
     }
 
     this.showDropdown.set(true);
+    this.onTouched();
+  }
+
+  public getInputClass(): string {
+    if (this.selectedItem()) {
+      return 'input-success';
+    } else if (
+      this.searchTerm().trim() !== '' &&
+      !this.isValidOption(this.searchTerm())
+    ) {
+      return 'input-error';
+    } else if (this.required() && this.searchTerm().trim() === '') {
+      return 'input-error';
+    }
+    return '';
   }
 
   public editItem(item: string, event: MouseEvent): void {
@@ -71,16 +139,27 @@ export class DropdownComponent {
   }
 
   public selectItem(item: string): void {
-    this.searchTerm.set(item);
-    this.selectedItem.set(item);
-    this.showDropdown.set(false);
-    this.itemSelected.emit(item);
+    if (this.isValidOption(item)) {
+      this.searchTerm.set(item);
+      this.selectedItem.set(item);
+      this.showDropdown.set(false);
+      this.itemSelected.emit(item);
+      this.onChange(item);
+      this.onTouched();
+    }
   }
 
   public submitNewItem(): void {
     this.submitNewItems.emit(true);
   }
 
+  public onInputClear(): void {
+    this.searchTerm.set('');
+    this.selectedItem.set(null);
+    this.onChange('');
+    this.onTouched();
+  }
+
   public onFocus(): void {
     this.showDropdown.set(true);
     this.filteredItems.set(this.items());
@@ -89,6 +168,14 @@ export class DropdownComponent {
   public onBlur(): void {
     setTimeout(() => {
       this.showDropdown.set(false);
+      this.onTouched();
     }, 100);
   }
+
+  private isValidOption(value: string): boolean {
+    return this.items().includes(value);
+  }
+
+  private onChange: (value: string) => void = () => {};
+  private onTouched: () => void = () => {};
 }