QR code and barcode scanner.

Requires :camera permission (request via Dala.Permissions.request/2).

Opens a full-screen camera preview. When a code is detected the view dismisses automatically and the result is delivered to handle_info:

handle_info({:scan, :result, %{type: :qr, value: "https://...", parsed: %{type: :url, value: "https://..."}}}, socket)
handle_info({:scan, :cancelled}, socket)

The parsed field is produced by Dala.Ui.Scan.parse/1 and contains a structured representation of the scanned value. See Dala.Ui.Scan for all supported formats (URL, WiFi, contact, email, phone, geo, text, calendar).

iOS: AVCaptureMetadataOutput. Android: CameraX + ML Kit BarcodeScanning.

Android dependency: add to app/build.gradle: implementation 'com.google.mlkit:barcode-scanning:17.2.0' implementation 'androidx.camera:camera-camera2:1.3.0' implementation 'androidx.camera:camera-lifecycle:1.3.0' implementation 'androidx.camera:camera-view:1.3.0'

Parsing scanned values

Use Dala.Ui.Scan.parse/1 to decode the raw value into a structured format:

def handle_info({:scan, :result, %{value: raw} = result}, socket) do
  case Dala.Ui.Scan.parse(raw) do
    %{type: :url, value: url} ->
      # Open URL
    %{type: :wifi, value: %{ssid: ssid, password: pw}} ->
      # Connect to WiFi
    %{type: :vcard, value: %{name: name, phone: phone}} ->
      # Save contact
    %{type: :text, value: text} ->
      # Plain text
  end
  {:noreply, socket}
end

Or use Dala.Ui.Scan.parse_direct/1 to parse a string directly without scanning.