102 lines
4.3 KiB
Kotlin
102 lines
4.3 KiB
Kotlin
package cy.agorise.bitsybitshareswallet.utils
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import android.content.Context
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import android.os.AsyncTask
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import android.os.Environment
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import android.util.Log
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import com.opencsv.CSVWriter
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import cy.agorise.bitsybitshareswallet.R
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import cy.agorise.bitsybitshareswallet.database.joins.TransferDetail
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import java.io.File
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import java.io.FileWriter
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import java.lang.ref.WeakReference
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import java.text.SimpleDateFormat
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import java.util.*
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/**
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* AsyncTask subclass used to move the CSV generation procedure to a background thread
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* and inform the UI of the progress.
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*/
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class CSVGenerationTask(context: Context) : AsyncTask<List<TransferDetail>, Int, String>() {
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companion object {
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private const val TAG = "CSVGenerationTask"
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}
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private val mContext: WeakReference<Context> = WeakReference(context)
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override fun doInBackground(vararg params: List<TransferDetail>): String {
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return createCSVDocument(params[0])
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}
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private fun createCSVDocument(transferDetails: List<TransferDetail>): String {
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return try {
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// Create and configure a new CSV file to save the transfers list
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val externalStorageFolder = Environment.getExternalStorageDirectory().absolutePath + File.separator +
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Constants.EXTERNAL_STORAGE_FOLDER
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val fileName = mContext.get()?.resources?.let {
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"${it.getString(R.string.app_name)}-${it.getString(R.string.title_transactions)}"} + ".csv"
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val file = File(externalStorageFolder, fileName)
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file.createNewFile()
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val csvWriter = CSVWriter(FileWriter(file))
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// Add the table header
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val row = Array(7) {""} // Array initialized with empty strings
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val columnNames = arrayOf(R.string.title_from, R.string.title_to, R.string.title_memo, R.string.title_date,
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R.string.title_time, R.string.title_amount, R.string.title_equivalent_value)
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for ((i, columnName) in columnNames.withIndex()) {
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row[i] = mContext.get()?.getString(columnName) ?: ""
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}
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csvWriter.writeNext(row)
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// Configure date and time formats to reuse in all the transfers
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val locale = mContext.get()?.resources?.configuration?.locale
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val dateFormat = SimpleDateFormat("MM-dd-yyyy", locale)
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val timeFormat = SimpleDateFormat("HH:mm:ss", locale)
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// Save all the transfers information
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for ( (index, transferDetail) in transferDetails.withIndex()) {
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val date = Date(transferDetail.date * 1000)
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row[0] = transferDetail.from ?: "" // From
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row[1] = transferDetail.to ?: "" // To
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row[2] = transferDetail.memo // Memo
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row[3] = dateFormat.format(date) // Date
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row[4] = timeFormat.format(date) // Time
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// Asset Amount
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val assetPrecision = transferDetail.assetPrecision
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val assetAmount = transferDetail.assetAmount.toDouble() / Math.pow(10.0, assetPrecision.toDouble())
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row[5] = String.format("%.${assetPrecision}f %s", assetAmount, transferDetail.assetSymbol)
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// Fiat Equivalent
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row[6] = if (transferDetail.fiatAmount != null && transferDetail.fiatSymbol != null) {
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val currency = Currency.getInstance(transferDetail.fiatSymbol)
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val fiatAmount = transferDetail.fiatAmount.toDouble() /
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Math.pow(10.0, currency.defaultFractionDigits.toDouble())
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String.format("%.${currency.defaultFractionDigits}f %s", fiatAmount, currency.currencyCode)
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} else {
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""
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}
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csvWriter.writeNext(row)
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// TODO update progress
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}
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csvWriter.close()
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"CSV generated and saved: ${file.absolutePath}"
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} catch (e: Exception) {
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Log.e(TAG, "Exception while trying to generate a CSV. Msg: " + e.message)
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"Unable to generate CSV. Please retry. Error: ${e.message}"
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}
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}
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override fun onProgressUpdate(values: Array<Int>) {
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// TODO show progress
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}
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override fun onPostExecute(message: String) {
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mContext.get()?.toast(message)
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}
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} |