feat : ajout d'un système de scanner bovin

2026-03-26 17:41:19 +01:00
parent 696100a622
commit d206185afb
7 changed files with 425 additions and 23 deletions
--- a/frontend/composables/useBarcodeScanner.ts
+++ b/frontend/composables/useBarcodeScanner.ts
@@ -0,0 +1,113 @@
+import { ref, onUnmounted } from 'vue'
+
+declare global {
+    interface Window {
+        BarcodeDetector: new (options?: { formats: string[] }) => {
+            detect(source: HTMLVideoElement | ImageBitmapSource): Promise<{ rawValue: string }[]>
+        }
+    }
+    const BarcodeDetector: Window['BarcodeDetector'] | undefined
+}
+
+export function useBarcodeScanner(onDetected: (code: string) => void) {
+    const isSupported = ref('BarcodeDetector' in globalThis)
+    const isScanning = ref(false)
+    const error = ref<string | null>(null)
+
+    let detector: InstanceType<Window['BarcodeDetector']> | null = null
+    let stream: MediaStream | null = null
+    let animationFrameId: number | null = null
+    let lastDetectedCode = ''
+    let lastDetectedTime = 0
+
+    const COOLDOWN_MS = 2000
+
+    async function start(videoElement: HTMLVideoElement) {
+        if (!isSupported.value) {
+            error.value = 'BarcodeDetector non supporté. Utilisez Chrome sur Android.'
+            return
+        }
+
+        try {
+            detector = new BarcodeDetector({ formats: ['code_39', 'code_128'] })
+
+            stream = await navigator.mediaDevices.getUserMedia({
+                video: {
+                    facingMode: 'environment',
+                    width: { ideal: 1280 },
+                    height: { ideal: 720 }
+                }
+            })
+
+            videoElement.srcObject = stream
+            await videoElement.play()
+            isScanning.value = true
+            error.value = null
+
+            scanLoop(videoElement)
+        } catch (e) {
+            error.value = e instanceof Error ? e.message : 'Erreur lors du démarrage de la caméra'
+            isScanning.value = false
+        }
+    }
+
+    function scanLoop(videoElement: HTMLVideoElement) {
+        if (!isScanning.value || !detector) return
+
+        animationFrameId = requestAnimationFrame(async () => {
+            try {
+                if (videoElement.readyState >= HTMLMediaElement.HAVE_ENOUGH_DATA) {
+                    const barcodes = await detector!.detect(videoElement)
+
+                    if (barcodes.length > 0) {
+                        const code = barcodes[0].rawValue.slice(4)
+                        const now = Date.now()
+
+                        if (code !== lastDetectedCode || now - lastDetectedTime > COOLDOWN_MS) {
+                            lastDetectedCode = code
+                            lastDetectedTime = now
+
+                            if (navigator.vibrate) {
+                                navigator.vibrate(100)
+                            }
+
+                            onDetected(code)
+                        }
+                    }
+                }
+            } catch {
+                // Detection error on single frame, continue
+            }
+
+            scanLoop(videoElement)
+        })
+    }
+
+    function stop() {
+        isScanning.value = false
+
+        if (animationFrameId !== null) {
+            cancelAnimationFrame(animationFrameId)
+            animationFrameId = null
+        }
+
+        if (stream) {
+            stream.getTracks().forEach(track => track.stop())
+            stream = null
+        }
+
+        detector = null
+    }
+
+    onUnmounted(() => {
+        stop()
+    })
+
+    return {
+        isSupported,
+        isScanning,
+        error,
+        start,
+        stop
+    }
+}