feat: move qrcode scanner into reuseable component (#3567)

Co-authored-by: Tiago Vasconcelos <talvasconcelos@gmail.com>

lnbits/static/js/components/lnbits-qrcode-scanner.js

@@ -0,0 +1,55 @@
+window.app.component('lnbits-qrcode-scanner', {
+  template: '#lnbits-qrcode-scanner',
+  mixins: [window.windowMixin],
+  watch: {
+    'g.showScanner'(newVal) {
+      if (newVal === true) {
+        if (this.g.hasCamera === false) {
+          Quasar.Notify.create({
+            message: 'No camera found on this device.',
+            type: 'negative'
+          })
+          this.g.showScanner = false
+        }
+      }
+    }
+  },
+  methods: {
+    detect(val) {
+      const rawValue = val[0].rawValue
+      console.log('Detected QR code value:', rawValue)
+      this.$emit('detect', rawValue)
+      this.g.showScanner = false
+    },
+    async onInitQR(promise) {
+      try {
+        await promise
+      } catch (error) {
+        const mapping = {
+          NotAllowedError: 'ERROR: you need to grant camera access permission',
+          NotFoundError: 'ERROR: no camera on this device',
+          NotSupportedError:
+            'ERROR: secure context required (HTTPS, localhost)',
+          NotReadableError: 'ERROR: is the camera already in use?',
+          OverconstrainedError: 'ERROR: installed cameras are not suitable',
+          StreamApiNotSupportedError:
+            'ERROR: Stream API is not supported in this browser',
+          InsecureContextError:
+            'ERROR: Camera access is only permitted in secure context. Use HTTPS or localhost rather than HTTP.'
+        }
+        const valid_error = Object.keys(mapping).filter(key => {
+          return error.name === key
+        })
+        const camera_error = valid_error
+          ? mapping[valid_error]
+          : `ERROR: Camera error (${error.name})`
+        Quasar.Notify.create({
+          message: camera_error,
+          type: 'negative'
+        })
+        this.g.hasCamera = false
+        this.showScanner = false
+      }
+    }
+  }
+})

lnbits/static/js/globals.js

@@ -11,6 +11,7 @@ const localStore = (key, defaultValue) => {
 window.g = Vue.reactive({
   isUserAuthorized: !!Quasar.Cookies.get('is_lnbits_user_authorized'),
   offline: !navigator.onLine,
+  hasCamera: false,
   visibleDrawer: false,
   extensions: WINDOW_SETTINGS.EXTENSIONS,
   user: null,
@@ -18,6 +19,7 @@ window.g = Vue.reactive({
   fiatBalance: 0,
   exchangeRate: 0,
   fiatTracking: false,
+  showScanner: false,
   payments: [],
   walletEventListeners: [],
   showNewWalletDialog: false,
@@ -52,7 +54,8 @@ window.g = Vue.reactive({
   ),
   ads: WINDOW_SETTINGS.AD_SPACE.split(',').map(ad => ad.split(';')),
   denomination: WINDOW_SETTINGS.LNBITS_DENOMINATION,
-  isSatsDenomination: WINDOW_SETTINGS.LNBITS_DENOMINATION == 'sats'
+  isSatsDenomination: WINDOW_SETTINGS.LNBITS_DENOMINATION == 'sats',
+  scanDetectCallback: null
 })
 
 window.dateFormat = 'YYYY-MM-DD HH:mm'
@@ -78,3 +81,9 @@ if (navigator.serviceWorker != null) {
     console.log('Registered events at scope: ', registration.scope)
   })
 }
+
+if (navigator.mediaDevices && navigator.mediaDevices.enumerateDevices) {
+  navigator.mediaDevices.enumerateDevices().then(devices => {
+    window.g.hasCamera = devices.some(device => device.kind === 'videoinput')
+  })
+}

lnbits/static/js/pages/wallet.js

@@ -97,12 +97,6 @@ window.PageWallet = {
     msatoshiFormat(value) {
       return LNbits.utils.formatSat(value / 1000)
     },
-    closeCamera() {
-      this.parse.camera.show = false
-    },
-    showCamera() {
-      this.parse.camera.show = true
-    },
     showReceiveDialog() {
       this.receive.show = true
       this.receive.status = 'pending'
@@ -205,35 +199,6 @@ window.PageWallet = {
           this.receive.status = 'pending'
         })
     },
-    async onInitQR(promise) {
-      try {
-        await promise
-      } catch (error) {
-        const mapping = {
-          NotAllowedError: 'ERROR: you need to grant camera access permission',
-          NotFoundError: 'ERROR: no camera on this device',
-          NotSupportedError:
-            'ERROR: secure context required (HTTPS, localhost)',
-          NotReadableError: 'ERROR: is the camera already in use?',
-          OverconstrainedError: 'ERROR: installed cameras are not suitable',
-          StreamApiNotSupportedError:
-            'ERROR: Stream API is not supported in this browser',
-          InsecureContextError:
-            'ERROR: Camera access is only permitted in secure context. Use HTTPS or localhost rather than HTTP.'
-        }
-        const valid_error = Object.keys(mapping).filter(key => {
-          return error.name === key
-        })
-        const camera_error = valid_error
-          ? mapping[valid_error]
-          : `ERROR: Camera error (${error.name})`
-        this.parse.camera.show = false
-        Quasar.Notify.create({
-          message: camera_error,
-          type: 'negative'
-        })
-      }
-    },
     lnurlScan() {
       LNbits.api
         .request('POST', '/api/v1/lnurlscan', this.g.wallet.adminkey, {
@@ -281,8 +246,8 @@ window.PageWallet = {
           LNbits.utils.notifyApiError(err)
         })
     },
-    decodeQR(res) {
-      this.parse.data.request = res[0].rawValue
+    decodeQR(val) {
+      this.parse.data.request = val
       this.decodeRequest()
       this.parse.camera.show = false
     },

lnbits/static/js/windowMixin.js

@@ -1,5 +1,15 @@
 window.windowMixin = {
   methods: {
+    handleScan(val) {
+      if (this.g.scanDetectCallback) {
+        this.g.scanDetectCallback(val)
+        this.g.scanDetectCallback = null
+      }
+    },
+    openScanDialog(scanDetectCallback) {
+      this.g.showScanner = true
+      this.g.scanDetectCallback = scanDetectCallback
+    },
     openNewWalletDialog(walletType = 'lightning') {
       this.g.newWalletType = walletType
       this.g.showNewWalletDialog = true

lnbits/static/vendor.json

@@ -83,6 +83,7 @@
     "js/components/lnbits-header-wallets.js",
     "js/components/lnbits-drawer.js",
     "js/components/lnbits-theme.js",
+    "js/components/lnbits-qrcode-scanner.js",
     "js/components/lnbits-manage-extension-list.js",
     "js/components/lnbits-manage-wallet-list.js",
     "js/components/lnbits-language-dropdown.js",

lnbits/templates/base.html

@@ -34,6 +34,7 @@
     <div id="vue">
       <q-layout view="hHh lpR lfr" v-cloak>
         <lnbits-disclaimer></lnbits-disclaimer>
+        <lnbits-qrcode-scanner @detect="handleScan"></lnbits-qrcode-scanner>
         <lnbits-theme></lnbits-theme>
         <lnbits-header></lnbits-header>
         {% block drawer %}

lnbits/templates/components.vue

@@ -10,6 +10,7 @@ include('components/admin/extensions.vue') %} {%
 include('components/admin/assets-config.vue') %} {%
 include('components/admin/notifications.vue') %} {%
 include('components/admin/server.vue') %} {%
+include('components/lnbits-qrcode-scanner.vue') %} {%
 include('components/lnbits-disclaimer.vue') %} {%
 include('components/lnbits-footer.vue') %} {%
 include('components/lnbits-header.vue') %} {%

lnbits/templates/components/lnbits-qrcode-scanner.vue

@@ -0,0 +1,22 @@
+<template id="lnbits-qrcode-scanner">
+  <q-dialog v-model="g.showScanner" position="top">
+    <q-card class="q-pa-lg q-pt-xl">
+      <div class="text-center q-mb-lg">
+        <qrcode-stream
+          @detect="detect"
+          @camera-on="onInitQR"
+          class="rounded-borders"
+        ></qrcode-stream>
+      </div>
+      <div class="row q-mt-lg">
+        <q-btn
+          @click="g.showScanner = false"
+          flat
+          color="grey"
+          class="q-ml-auto"
+          :label="$t('cancel')"
+        ></q-btn>
+      </div>
+    </q-card>
+  </q-dialog>
+</template>

lnbits/templates/pages/wallet.vue

@@ -156,14 +156,15 @@
                 icon="file_upload"
               ></q-btn>
               <q-btn
+                v-if="g.hasCamera"
                 unelevated
-                color="secondary"
                 icon="qr_code_scanner"
+                color="secondary"
+                @click="openScanDialog(decodeQR)"
                 :disable="
                   !this.g.wallet.canReceivePayments &&
                   !this.g.wallet.canSendPayments
                 "
-                @click="showCamera"
               >
                 <q-tooltip
                   ><span v-text="$t('camera_tooltip')"></span
@@ -842,27 +843,6 @@
     </q-card>
   </q-dialog>
 
-  <q-dialog v-model="parse.camera.show" position="top">
-    <q-card class="q-pa-lg q-pt-xl">
-      <div class="text-center q-mb-lg">
-        <qrcode-stream
-          @detect="decodeQR"
-          @camera-on="onInitQR"
-          class="rounded-borders"
-        ></qrcode-stream>
-      </div>
-      <div class="row q-mt-lg">
-        <q-btn
-          @click="closeCamera"
-          flat
-          color="grey"
-          class="q-ml-auto"
-          :label="$t('cancel')"
-        ></q-btn>
-      </div>
-    </q-card>
-  </q-dialog>
-
   <div
     class="lt-md fixed-bottom left-0 right-0 bg-primary text-white shadow-2 z-top"
   >
@@ -877,12 +857,13 @@
       <q-tab @click="showParseDialog" icon="file_upload" :label="$t('send')">
       </q-tab>
     </q-tabs>
+
     <q-btn
+      @click="openScanDialog(decodeQR)"
       round
-      size="35px"
       unelevated
+      size="35px"
       icon="qr_code_scanner"
-      @click="showCamera"
       class="text-white bg-primary z-top vertical-bottom absolute-center absolute"
     >
     </q-btn>

package.json

@@ -135,6 +135,7 @@
       "js/components/lnbits-header-wallets.js",
       "js/components/lnbits-drawer.js",
       "js/components/lnbits-theme.js",
+      "js/components/lnbits-qrcode-scanner.js",
       "js/components/lnbits-manage-extension-list.js",
       "js/components/lnbits-manage-wallet-list.js",
       "js/components/lnbits-language-dropdown.js",