Feature: front/back camera toggle

- Added to gifting and profile dialog camera for now. Toggle button is hidden in desktop.
- WIP: same feature for QR scanner camera.
- WIP: ability to specify default camera depending on where it's called.

src/components/ImageMethodDialog.vue

@@ -119,12 +119,21 @@
                   playsinline
                   muted
                 ></video>
-                <button
-                  class="absolute bottom-4 left-1/2 -translate-x-1/2 bg-white text-slate-800 p-3 rounded-full text-2xl leading-none"
-                  @click="capturePhoto"
-                >
-                  <font-awesome icon="camera" class="w-[1em]" />
-                </button>
+                <div class="absolute bottom-4 inset-x-0 flex items-center justify-center gap-4">
+                  <button
+                    class="bg-white text-slate-800 p-3 rounded-full text-2xl leading-none"
+                    @click="capturePhoto"
+                  >
+                    <font-awesome icon="camera" class="w-[1em]" />
+                  </button>
+                  <button
+                    v-if="platformCapabilities.isMobile"
+                    class="bg-white text-slate-800 p-3 rounded-full text-2xl leading-none"
+                    @click="rotateCamera"
+                  >
+                    <font-awesome icon="rotate" class="w-[1em]" />
+                  </button>
+                </div>
               </div>
             </div>
             <div
@@ -303,6 +312,9 @@ export default class ImageMethodDialog extends Vue {
   /** Camera stream reference */
   private cameraStream: MediaStream | null = null;
 
+  /** Current camera facing mode */
+  private currentFacingMode: 'environment' | 'user' = 'environment';
+
   private platformService = PlatformServiceFactory.getInstance();
   URL = window.URL || window.webkitURL;
 
@@ -478,7 +490,7 @@ export default class ImageMethodDialog extends Vue {
       await this.$nextTick();
 
       const stream = await navigator.mediaDevices.getUserMedia({
-        video: { facingMode: "environment" },
+        video: { facingMode: this.currentFacingMode },
       });
       logger.debug("Camera access granted");
       this.cameraStream = stream;
@@ -503,15 +515,17 @@ export default class ImageMethodDialog extends Vue {
       let errorMessage =
         error instanceof Error ? error.message : "Failed to access camera";
       if (
+        error instanceof Error && (
         error.name === "NotReadableError" ||
         error.name === "TrackStartError"
-      ) {
+      )) {
         errorMessage =
           "Camera is in use by another application. Please close any other apps or browser tabs using the camera and try again.";
       } else if (
+        error instanceof Error && (
         error.name === "NotAllowedError" ||
         error.name === "PermissionDeniedError"
-      ) {
+      )) {
         errorMessage =
           "Camera access was denied. Please allow camera access in your browser settings.";
       }
@@ -579,6 +593,42 @@ export default class ImageMethodDialog extends Vue {
     }
   }
 
+  async rotateCamera() {
+    if (this.platformCapabilities.isNativeApp) {
+      try {
+        await this.platformService.rotateCamera();
+        // Take a new picture with the rotated camera
+        const result = await this.platformService.takePicture();
+        this.blob = result.blob;
+        this.fileName = result.fileName;
+        this.showRetry = true;
+      } catch (error) {
+        logger.error("Error rotating camera:", error);
+        this.$notify(
+          {
+            group: "alert",
+            type: "danger",
+            title: "Error",
+            text: "Failed to rotate camera. Please try again.",
+          },
+          5000,
+        );
+      }
+    } else {
+      // For web browsers, toggle between front and back cameras
+      this.currentFacingMode = this.currentFacingMode === 'environment' ? 'user' : 'environment';
+      
+      // Stop current stream
+      if (this.cameraStream) {
+        this.cameraStream.getTracks().forEach(track => track.stop());
+        this.cameraStream = null;
+      }
+
+      // Start new stream with updated facing mode
+      await this.startCameraPreview();
+    }
+  }
+
   private createBlobURL(blob: Blob): string {
     return URL.createObjectURL(blob);
   }

src/services/PlatformService.ts

@@ -26,6 +26,8 @@ export interface PlatformCapabilities {
   hasFileDownload: boolean;
   /** Whether the platform requires special file handling instructions */
   needsFileHandlingInstructions: boolean;
+  /** Whether the platform is a native app (Capacitor, Electron, etc.) */
+  isNativeApp: boolean;
 }
 
 /**
@@ -92,6 +94,12 @@ export interface PlatformService {
    */
   pickImage(): Promise<ImageResult>;
 
+  /**
+   * Rotates the camera between front and back cameras.
+   * @returns Promise that resolves when the camera is rotated
+   */
+  rotateCamera(): Promise<void>;
+
   /**
    * Handles deep link URLs for the application.
    * @param url - The deep link URL to handle

src/services/platforms/CapacitorPlatformService.ts

@@ -4,7 +4,7 @@ import {
   PlatformCapabilities,
 } from "../PlatformService";
 import { Filesystem, Directory, Encoding } from "@capacitor/filesystem";
-import { Camera, CameraResultType, CameraSource } from "@capacitor/camera";
+import { Camera, CameraResultType, CameraSource, CameraDirection } from "@capacitor/camera";
 import { Share } from "@capacitor/share";
 import { logger } from "../../utils/logger";
 
@@ -16,6 +16,9 @@ import { logger } from "../../utils/logger";
  * - Platform-specific features
  */
 export class CapacitorPlatformService implements PlatformService {
+  /** Current camera direction */
+  private currentDirection: CameraDirection = 'BACK';
+
   /**
    * Gets the capabilities of the Capacitor platform
    * @returns Platform capabilities object
@@ -28,6 +31,7 @@ export class CapacitorPlatformService implements PlatformService {
       isIOS: /iPad|iPhone|iPod/.test(navigator.userAgent),
       hasFileDownload: false,
       needsFileHandlingInstructions: true,
+      isNativeApp: true,
     };
   }
 
@@ -401,6 +405,7 @@ export class CapacitorPlatformService implements PlatformService {
         allowEditing: true,
         resultType: CameraResultType.Base64,
         source: CameraSource.Camera,
+        direction: this.currentDirection,
       });
 
       const blob = await this.processImageData(image.base64String);
@@ -466,6 +471,15 @@ export class CapacitorPlatformService implements PlatformService {
     return new Blob(byteArrays, { type: "image/jpeg" });
   }
 
+  /**
+   * Rotates the camera between front and back cameras.
+   * @returns Promise that resolves when the camera is rotated
+   */
+  async rotateCamera(): Promise<void> {
+    this.currentDirection = this.currentDirection === 'BACK' ? 'FRONT' : 'BACK';
+    logger.debug(`Camera rotated to ${this.currentDirection} camera`);
+  }
+
   /**
    * Handles deep link URLs for the application.
    * Note: Capacitor handles deep links automatically.