85 lines
3.3 KiB
Kotlin
85 lines
3.3 KiB
Kotlin
package cy.agorise.bitsybitshareswallet.viewmodels
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import android.app.Application
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import android.graphics.Bitmap
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import android.graphics.Color
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import android.util.Log
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import androidx.lifecycle.AndroidViewModel
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import androidx.lifecycle.LiveData
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import androidx.lifecycle.MutableLiveData
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import androidx.lifecycle.viewModelScope
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import com.google.zxing.BarcodeFormat
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import com.google.zxing.EncodeHintType
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import com.google.zxing.MultiFormatWriter
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import com.google.zxing.WriterException
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import cy.agorise.bitsybitshareswallet.database.entities.Asset
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import cy.agorise.bitsybitshareswallet.database.entities.UserAccount
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import cy.agorise.bitsybitshareswallet.repositories.AssetRepository
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import cy.agorise.bitsybitshareswallet.repositories.UserAccountRepository
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import cy.agorise.graphenej.Invoice
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import kotlinx.coroutines.Dispatchers.Default
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import kotlinx.coroutines.launch
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import kotlinx.coroutines.withContext
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import java.util.HashMap
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class ReceiveTransactionViewModel(application: Application) : AndroidViewModel(application) {
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private var mUserAccountRepository = UserAccountRepository(application)
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private var mAssetRepository = AssetRepository(application)
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private val _qrCodeBitmap = MutableLiveData<Bitmap>()
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val qrCodeBitmap: LiveData<Bitmap>
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get() = _qrCodeBitmap
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internal fun getUserAccount(id: String): LiveData<UserAccount> {
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return mUserAccountRepository.getUserAccount(id)
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}
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internal fun getAllNonZero(): LiveData<List<Asset>> {
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return mAssetRepository.getAllNonZero()
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}
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internal fun updateInvoice(invoice: Invoice, size: Int) {
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viewModelScope.launch {
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try {
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_qrCodeBitmap.value = encodeAsBitmap(Invoice.toQrCode(invoice), "#139657", size) // PalmPay green
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} catch (e: Exception) {
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Log.d("ReceiveTransactionVM", e.message ?: "Unknown error in updateInvoice")
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}
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}
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}
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/**
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* Encodes the provided data as a QR-code. Used to provide payment requests.
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* @param data: Data containing payment request data as the recipient's address and the requested amount.
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* @param color: The color used for the QR-code
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* @param size: The size in pixels of the QR-code to generate
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* @return Bitmap with the QR-code encoded data
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* @throws WriterException if QR Code cannot be generated
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* @throws IllegalArgumentException IllegalArgumentException
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*/
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@Throws(WriterException::class, IllegalArgumentException::class)
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private suspend fun encodeAsBitmap(data: String, color: String, size: Int): Bitmap? =
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withContext(Default) {
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val hints = HashMap<EncodeHintType, Any>()
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hints[EncodeHintType.MARGIN] = 2
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val result = MultiFormatWriter().encode(
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data,
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BarcodeFormat.QR_CODE, size, size, hints
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)
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val pixels = IntArray(size * size)
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for (y in 0 until size) {
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val offset = y * size
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for (x in 0 until size) {
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pixels[offset + x] =
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if (result.get(x, y)) Color.parseColor(color) else Color.WHITE
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}
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}
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val bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888)
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bitmap.setPixels(pixels, 0, size, 0, 0, size, size)
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bitmap
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}
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} |