BugsnagTree.kt

import android.util.Log
import com.bugsnag.android.Bugsnag
import timber.log.Timber
import java.util.*

class BugsnagTree : Timber.DebugTree() {
  // Adding one to the initial size accounts for the add before remove.
  private val buffer = ArrayDeque<String>(BUFFER_SIZE + 1)

  override fun isLoggable(tag: String?, priority: Int): Boolean = priority >= Log.INFO

  override fun log(priority: Int, tag: String?, message: String, exception: Throwable?) {
    val adjustedMessage = """${System.currentTimeMillis()} ${priorityToString(priority)} $message"""
    synchronized(buffer) {
      buffer.addLast(adjustedMessage)
      if (buffer.size > BUFFER_SIZE) {
        buffer.removeFirst()
      }
    }
    if (exception != null && priority == Log.ERROR) {
      Bugsnag.notify(exception)
    }
  }

  companion object {
    private const val BUFFER_SIZE = 200

    private fun priorityToString(priority: Int) = when (priority) {
      Log.ERROR -> "E"
      Log.WARN -> "W"
      Log.INFO -> "I"
      Log.DEBUG -> "D"
      else -> priority.toString()
    }
  }
}