Function to save log files

LogHelper.kt

 /**
         * If the date is the same as the file, continue adding logs, but if the file has
         * a past date, update that file to Firebase storage and delete that file.
         */
        fun appendLog(context: Context, targetText: String) {

            Timber.d("Saving a new log")

            // Get flog files in local storage
            val date = Date()
            val stringDate: String = SimpleDateFormat("yyyy_MM_dd", Locale.US).format(date)
            val logsFiles: Array<out File>? = File("${context.filesDir}/$logsDir").listFiles()
            Timber.d("Logs files: ${logsFiles?.size}")
            var fileForTodayExists = false // flag used to create a log file or not

            // Check out hte log files
            logsFiles?.forEach { file ->
                Timber.d("File log name: ${file.name}")

                if (file.name == "$stringDate$suffixName") { // Log file for today fount
                    Timber.i("File for this day exists")
                    fileForTodayExists = true

                } else { // Update this past file to Firebase storage and delete it (In background)
                    Timber.i("There is a file for a previous day")

                    CoroutineScope(Dispatchers.IO).launch {
                        Timber.i("Sending previous file to firebase storage")

                        val logReference = FirebaseStorage
                                .getInstance()
                                .reference
                                .child("logs/${file.name}")

                        val uriFile = Uri.fromFile(file)
                        val uploadTask = logReference.putFile(uriFile)

                        uploadTask.addOnFailureListener { e ->
                            Timber.e(e)
                        }.addOnSuccessListener { _ ->
                            // Delete the file form local storage
                            Timber.i("Successfully sent file. Delete file from local storage")
                            file.delete()
                        }
                    }
                }
            }

            // If the file does not exist, create it
            if (!fileForTodayExists) {
                try {
                    Timber.i("Creating file for today")

                    // Check if folder for logs exist
                    val root = File("${context.filesDir}/$logsDir")
                    if (!root.exists()) {
                        root.mkdirs()
                    }
                    File("${context.filesDir}/$logsDir/$stringDate$suffixName").createNewFile()

                } catch (e: IOException) {
                    Timber.e(e)
                }
            }

            // Finally write the log
            try {
                //BufferedWriter for performance, true to set append to file flag
                val buf = BufferedWriter(FileWriter(File("${context.filesDir}/$logsDir/$stringDate$suffixName"), true))
                val time = SimpleDateFormat("HH.mm.ss", Locale.US).format(Date())
                buf.append(time)
                buf.append("\t")
                buf.append(targetText)
                buf.newLine()
                buf.close()
            } catch (e: IOException) {
                Timber.e(e, "Error appending log")
            }

        }
    }