react-native-vision-camera/android/src/main/java/com/mrousavy/camera/CameraView+TakeSnapshot.kt

package com.mrousavy.camera

import android.graphics.Bitmap
import androidx.exifinterface.media.ExifInterface
import com.facebook.react.bridge.Arguments
import com.facebook.react.bridge.ReadableMap
import com.facebook.react.bridge.WritableMap
import com.mrousavy.camera.utils.buildMetadataMap
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.coroutineScope
import kotlinx.coroutines.withContext
import java.io.File
import java.io.FileOutputStream

suspend fun CameraView.takeSnapshot(options: ReadableMap): WritableMap = coroutineScope {
  val bitmap = this@takeSnapshot.previewView.bitmap ?: throw CameraNotReadyError()

  val quality = if (options.hasKey("quality")) options.getInt("quality") else 100

  val file: File
  val exif: ExifInterface
  @Suppress("BlockingMethodInNonBlockingContext")
  withContext(Dispatchers.IO) {
    file = File.createTempFile("mrousavy", ".jpg", context.cacheDir).apply { deleteOnExit() }
    FileOutputStream(file).use { stream ->
      bitmap.compress(Bitmap.CompressFormat.JPEG, quality, stream)
    }
    exif = ExifInterface(file)
  }

  val map = Arguments.createMap()
  map.putString("path", file.absolutePath)
  map.putInt("width", bitmap.width)
  map.putInt("height", bitmap.height)
  map.putBoolean("isRawPhoto", false)

  val skipMetadata = if (options.hasKey("skipMetadata")) options.getBoolean("skipMetadata") else false
  val metadata = if (skipMetadata) null else exif.buildMetadataMap()
  map.putMap("metadata", metadata)

  return@coroutineScope map
}