feat: integrate reCAPTCHA for contact form validation and submission WIP #8

Api/Api.csproj

@@ -10,6 +10,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Google.Cloud.RecaptchaEnterprise.V1" Version="2.18.0" />
     <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="8.0.18" NoWarn="NU1605" />
     <PackageReference Include="Microsoft.AspNetCore.Authentication.OpenIdConnect" Version="8.0.18" NoWarn="NU1605" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.18">

Api/Helpers/ReCapthchaAssessment.cs

@@ -0,0 +1,62 @@
+using System;
+using Google.Api.Gax.ResourceNames;
+using Google.Cloud.RecaptchaEnterprise.V1;
+
+namespace Api.Helpers
+{
+    public static class ReCaptchaAssessment
+    {
+        // Checks the supplied token with Recaptcha Enterprise and returns true if valid.
+        // Outputs a short reason when false (invalid reason or exception message).
+        public static bool CheckToken(string token, out string reason, string projectId = "webserverfarm", string recaptchaKey = "6Lf6df0rAAAAAMXcAx1umneXl1QJo9rTrflpWCvB")
+        {
+            reason = string.Empty;
+
+            if (string.IsNullOrWhiteSpace(token))
+            {
+                reason = "empty-token";
+                return false;
+            }
+
+            try
+            {
+                var client = RecaptchaEnterpriseServiceClient.Create();
+
+                var request = new CreateAssessmentRequest
+                {
+                    Parent = $"projects/{projectId}",
+                    Assessment = new Assessment
+                    {
+                        Event = new Event
+                        {
+                            SiteKey = recaptchaKey,
+                            Token = token
+                        }
+                    }
+                };
+
+                var response = client.CreateAssessment(request);
+
+                if (response?.TokenProperties == null)
+                {
+                    reason = "missing-token-properties";
+                    return false;
+                }
+
+                if (!response.TokenProperties.Valid)
+                {
+                    reason = response.TokenProperties.InvalidReason.ToString();
+                    return false;
+                }
+
+                reason = "valid";
+                return true;
+            }
+            catch (Exception ex)
+            {
+                reason = ex.Message;
+                return false;
+            }
+        }
+    }
+}

Web/src/app/pages/front-pages/contact/contact.component.html

@@ -11,13 +11,12 @@
   </div>
 
   <div class="form-content">
-    <form>
     <div class="container">
       <!-- Map stays inside, but will visually float out -->
       <div class="map-container overflow-hidden rounded">
         <iframe class="overflow-hidden rounded"
-            src="https://maps.google.com/maps?q=48.72388977142655,21.247448657208842&z=15&output=embed"
+          src="https://maps.google.com/maps?q=48.72388977142655,21.247448657208842&z=15&output=embed" width="100%"
-            width="100%" height="400" style="border: 0" allowfullscreen="" loading="lazy"
+          height="400" style="border: 0" allowfullscreen="" loading="lazy"
           referrerpolicy="no-referrer-when-downgrade"></iframe>
       </div>
       <div class="spacing-top-bottom">
@@ -28,24 +27,24 @@
                 <!-- input -->
                 <mat-label class="f-s-14 f-w-600 m-b-8 d-block">Meno<span>*</span></mat-label>
                 <mat-form-field appearance="outline" class="w-100" color="primary">
-                    <input matInput type="text" placeholder="Meno" />
+                  <input matInput type="text" placeholder="Meno" [(ngModel)]="model.name" />
                 </mat-form-field>
                 <!-- input -->
                 <mat-label class="f-s-14 f-w-600 m-b-8 d-block">Telefónne číslo<span>*</span></mat-label>
                 <mat-form-field appearance="outline" class="w-100" color="primary">
-                    <input matInput type="tel" placeholder="xxxx xxx xxxx" />
+                  <input matInput type="tel" placeholder="xxxx xxx xxxx" [(ngModel)]="model.phone" />
                 </mat-form-field>
               </div>
               <div class="col-md-6">
                 <!-- input -->
                 <mat-label class="f-s-14 f-w-600 m-b-8 d-block">Priezvisko<span>*</span></mat-label>
                 <mat-form-field appearance="outline" class="w-100" color="primary">
-                    <input matInput type="text" placeholder="Priezvisko" />
+                  <input matInput type="text" placeholder="Priezvisko" [(ngModel)]="model.surname" />
                 </mat-form-field>
                 <!-- input -->
                 <mat-label class="f-s-14 f-w-600 m-b-8 d-block">Email<span>*</span></mat-label>
                 <mat-form-field appearance="outline" class="w-100" color="primary">
-                    <input matInput type="mail" placeholder="Emailová adresa" />
+                  <input matInput type="mail" placeholder="Emailová adresa" [(ngModel)]="model.email" />
                 </mat-form-field>
               </div>
             </div>
@@ -55,7 +54,7 @@
                 <mat-label class="f-s-14 f-w-600 m-b-8 d-block">Dopyt týkajúci sa<span>*</span>
                 </mat-label>
                 <mat-form-field appearance="outline" class="w-100">
-                    <mat-select value="General Enquiry">
+                  <mat-select value="General Enquiry" [(ngModel)]="model.subject">
                     <mat-option value="General Enquiry">Všeobecný dopyt</mat-option>
                     <mat-option value="Registration Enquiry">Žiadosť o registráciu</mat-option>
                   </mat-select>
@@ -66,11 +65,21 @@
               <div class="col-lg-12">
                 <mat-label class="f-s-14 f-w-600 m-b-8 d-block">Správa</mat-label>
                 <mat-form-field appearance="outline" class="w-100" color="primary">
-                    <textarea matInput rows="5" placeholder="Napíšte svoju správu sem"></textarea>
+                  <textarea matInput rows="5" placeholder="Napíšte svoju správu sem" [(ngModel)]="model.message"
+                    name="message"></textarea>
                 </mat-form-field>
               </div>
             </div>
-              <button mat-flat-button>Odoslať</button>
+
+            <!-- reCAPTCHA widget: uses siteKey from component -->
+            <div class="row m-t-16">
+              <div class="col-lg-12">
+                <!-- anchor for programmatic render -->
+                <div #recaptcha class="g-recaptcha"></div>
+              </div>
+            </div>
+
+            <button mat-flat-button type="button" (click)="onSubmit()">Odoslať</button>
           </div>
           <div class="col-md-4 right-side-content">
             <mat-card class="shadow-none bg-primary rounded-8 p-8">
@@ -94,7 +103,6 @@
         </div>
       </div>
     </div>
-    </form>
   </div>
   <div class="footer">
     <app-footer></app-footer>

Web/src/app/pages/front-pages/contact/contact.component.ts

@@ -1,14 +1,91 @@
-import { Component } from '@angular/core';
+import { Component, AfterViewInit, ViewChild, ElementRef, NgZone } from '@angular/core';
 import { IconModule } from '../../../icon/icon.module';
 import { MaterialModule } from '../../../material.module';
 import { FooterComponent } from '../footer/footer.component';
+import { FormsModule } from '@angular/forms';
+import { HttpClient } from '@angular/common/http';
 
 @Component({
   selector: 'app-contact',
-  imports: [MaterialModule,IconModule,FooterComponent],
+  imports: [MaterialModule, IconModule, FooterComponent, FormsModule],
   templateUrl: './contact.component.html',
   styleUrl: './contact.component.scss'
 })
-export class ContactComponent {
+export class ContactComponent implements AfterViewInit {
+  model: any = {
+    name: '',
+    surname: '',
+    phone: '',
+    email: '',
+    subject: '',
+    message: ''
+  };
+  siteKey: string = '6Lf6df0rAAAAAMXcAx1umneXl1QJo9rTrflpWCvB';
+  @ViewChild('recaptcha', { static: false }) recaptchaElem!: ElementRef;
+  widgetId: number | null = null;
 
+  constructor(private http: HttpClient) { }
+
+  ngAfterViewInit(): void {
+    const win: any = window as any;
+    const renderWidget = () => {
+      const grecaptcha = win.grecaptcha;
+      if (grecaptcha && grecaptcha.render && this.recaptchaElem) {
+        // render widget and keep id
+        this.widgetId = grecaptcha.render(this.recaptchaElem.nativeElement, { sitekey: this.siteKey });
+      }
+    };
+
+    // if grecaptcha already loaded, render immediately
+    if ((win as any).grecaptcha && (win as any).grecaptcha.render) {
+      renderWidget();
+      return;
+    }
+
+    // otherwise define global callback that the index.html script will call when loaded
+    (win as any).onRecaptchaLoad = () => {
+      setTimeout(renderWidget);
+    };
+  }
+
+  onSubmit() {
+    // get token from grecaptcha
+    const grecaptchaAny: any = (window as any).grecaptcha;
+    let token = '';
+    if (grecaptchaAny && grecaptchaAny.getResponse) {
+      token = this.widgetId !== null ? grecaptchaAny.getResponse(this.widgetId) : grecaptchaAny.getResponse();
+    }
+
+    if (!token) {
+      // optionally show UI feedback to complete captcha
+      alert('Prosím, potvrďte reCAPTCHA.');
+      return;
+    }
+
+    const payload = {
+      name: this.model.name,
+      surname: this.model.surname,
+      phone: this.model.phone,
+      email: this.model.email,
+      subject: this.model.subject,
+      message: this.model.message,
+      recaptchatoken: token
+    };
+
+    // POST to your backend endpoint which must verify the token with Google
+    this.http.post('/api/webmessages', payload).subscribe({
+      next: () => {
+        alert('Správa odoslaná');
+        // reset widget
+        if (grecaptchaAny && grecaptchaAny.reset) {
+          if (this.widgetId !== null) grecaptchaAny.reset(this.widgetId);
+          else grecaptchaAny.reset();
+        }
+      },
+      error: (err) => {
+        console.error(err);
+        alert('Chyba pri odosielaní — skúste znova.');
+      }
+    });
+  }
 }

Web/src/index.html

@@ -16,10 +16,11 @@
   <link href="https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700&display=swap"
     rel="stylesheet">
   <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+  <!-- load recaptcha in explicit render mode and call onRecaptchaLoad when ready -->
+  <script src="https://www.google.com/recaptcha/api.js?onload=onRecaptchaLoad&render=explicit" async defer></script>
 </head>
 
 <body class="mat-typography">
   <app-root></app-root>
 </body>
-
 </html>