Implement voucher dialog in compose

android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/dialog/RedeemVoucherDialog.kt

@@ -0,0 +1,286 @@
+package net.mullvad.mullvadvpn.compose.dialog
+
+import android.content.res.Configuration
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.layout.wrapContentSize
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.ButtonDefaults
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.focus.FocusRequester
+import androidx.compose.ui.focus.focusRequester
+import androidx.compose.ui.graphics.compositeOver
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.res.pluralStringResource
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.tooling.preview.Devices
+import androidx.compose.ui.tooling.preview.Preview
+import net.mullvad.mullvadvpn.R
+import net.mullvad.mullvadvpn.compose.button.ActionButton
+import net.mullvad.mullvadvpn.compose.state.VoucherDialogState
+import net.mullvad.mullvadvpn.compose.state.VoucherDialogUiState
+import net.mullvad.mullvadvpn.compose.textfield.GroupedTextField
+import net.mullvad.mullvadvpn.compose.util.vouchersVisualTransformation
+import net.mullvad.mullvadvpn.constant.VOUCHER_LENGTH
+import net.mullvad.mullvadvpn.lib.theme.AlphaDescription
+import net.mullvad.mullvadvpn.lib.theme.AlphaDisabled
+import net.mullvad.mullvadvpn.lib.theme.AlphaInactive
+import net.mullvad.mullvadvpn.lib.theme.AppTheme
+import net.mullvad.mullvadvpn.lib.theme.Dimens
+import org.joda.time.DateTimeConstants
+
+@Preview(device = Devices.TV_720p)
+@Composable
+private fun PreviewRedeemVoucherDialog() {
+    AppTheme {
+        RedeemVoucherDialog(
+            uiState = VoucherDialogUiState.INITIAL,
+            onVoucherInputChange = {},
+            onRedeem = {},
+            onDismiss = {}
+        )
+    }
+}
+
+@Preview(uiMode = Configuration.UI_MODE_NIGHT_YES, device = Devices.PIXEL_3)
+@Composable
+private fun PreviewRedeemVoucherDialogVerifying() {
+    AppTheme {
+        RedeemVoucherDialog(
+            uiState = VoucherDialogUiState("", VoucherDialogState.Verifying),
+            onVoucherInputChange = {},
+            onRedeem = {},
+            onDismiss = {}
+        )
+    }
+}
+
+@Preview(uiMode = Configuration.UI_MODE_NIGHT_YES, device = Devices.PIXEL_3)
+@Composable
+private fun PreviewRedeemVoucherDialogError() {
+    AppTheme {
+        RedeemVoucherDialog(
+            uiState = VoucherDialogUiState("", VoucherDialogState.Error("An Error message")),
+            onVoucherInputChange = {},
+            onRedeem = {},
+            onDismiss = {}
+        )
+    }
+}
+
+@Preview(uiMode = Configuration.UI_MODE_NIGHT_YES, device = Devices.PIXEL_3)
+@Composable
+private fun PreviewRedeemVoucherDialogSuccess() {
+    AppTheme {
+        RedeemVoucherDialog(
+            uiState = VoucherDialogUiState("", VoucherDialogState.Success(3600)),
+            onVoucherInputChange = {},
+            onRedeem = {},
+            onDismiss = {}
+        )
+    }
+}
+
+@Composable
+fun RedeemVoucherDialog(
+    uiState: VoucherDialogUiState,
+    onVoucherInputChange: (String) -> Unit = {},
+    onRedeem: (voucherCode: String) -> Unit,
+    onDismiss: () -> Unit
+) {
+    AlertDialog(
+        title = {
+            if (uiState.voucherViewModelState !is VoucherDialogState.Success)
+                Text(
+                    text = stringResource(id = R.string.enter_voucher_code),
+                    style = MaterialTheme.typography.titleMedium
+                )
+        },
+        confirmButton = {
+            Column {
+                if (uiState.voucherViewModelState !is VoucherDialogState.Success) {
+                    ActionButton(
+                        text = stringResource(id = R.string.redeem),
+                        onClick = { onRedeem(uiState.voucherInput) },
+                        modifier = Modifier.padding(bottom = Dimens.mediumPadding),
+                        colors =
+                            ButtonDefaults.buttonColors(
+                                containerColor = MaterialTheme.colorScheme.surface,
+                                contentColor = MaterialTheme.colorScheme.onSurface,
+                                disabledContentColor =
+                                    MaterialTheme.colorScheme.onSurface
+                                        .copy(alpha = AlphaInactive)
+                                        .compositeOver(MaterialTheme.colorScheme.surface),
+                                disabledContainerColor =
+                                    MaterialTheme.colorScheme.surface
+                                        .copy(alpha = AlphaDisabled)
+                                        .compositeOver(MaterialTheme.colorScheme.surface)
+                            ),
+                        isEnabled = uiState.voucherInput.length == VOUCHER_LENGTH
+                    )
+                }
+                ActionButton(
+                    colors =
+                        ButtonDefaults.buttonColors(
+                            containerColor = MaterialTheme.colorScheme.primary,
+                            contentColor = MaterialTheme.colorScheme.onPrimary,
+                        ),
+                    text =
+                        stringResource(
+                            id =
+                                if (uiState.voucherViewModelState is VoucherDialogState.Success)
+                                    R.string.changes_dialog_dismiss_button
+                                else R.string.cancel
+                        ),
+                    onClick = onDismiss
+                )
+            }
+        },
+        text = {
+            Column(
+                modifier = Modifier.fillMaxWidth(),
+                horizontalAlignment = Alignment.CenterHorizontally
+            ) {
+                if (uiState.voucherViewModelState is VoucherDialogState.Success) {
+                    val days: Int =
+                        (uiState.voucherViewModelState.addedTime /
+                                DateTimeConstants.SECONDS_PER_DAY)
+                            .toInt()
+                    val message =
+                        stringResource(
+                            R.string.added_to_your_account,
+                            when (days) {
+                                0 -> {
+                                    stringResource(R.string.less_than_one_day)
+                                }
+                                in 1..59 -> {
+                                    pluralStringResource(id = R.plurals.days, count = days, days)
+                                }
+                                else -> {
+                                    pluralStringResource(
+                                        id = R.plurals.months,
+                                        count = days / 30,
+                                        days / 30
+                                    )
+                                }
+                            }
+                        )
+                    RedeemSuccessBody(message = message)
+                } else {
+
+                    EnterVoucherBody(
+                        uiState = uiState,
+                        onVoucherInputChange = onVoucherInputChange,
+                        onRedeem = onRedeem
+                    )
+                }
+            }
+        },
+        containerColor = MaterialTheme.colorScheme.background,
+        titleContentColor = MaterialTheme.colorScheme.onBackground,
+        onDismissRequest = onDismiss
+    )
+}
+
+@Composable
+private fun RedeemSuccessBody(message: String) {
+    Image(
+        painter = painterResource(R.drawable.icon_success),
+        contentDescription = null,
+        modifier = Modifier.fillMaxWidth().height(Dimens.buttonHeight)
+    )
+    Text(
+        text = stringResource(id = R.string.voucher_success_title),
+        modifier =
+            Modifier.padding(
+                    start = Dimens.smallPadding,
+                    top = Dimens.successIconVerticalPadding,
+                )
+                .fillMaxWidth(),
+        color = MaterialTheme.colorScheme.onPrimary,
+        style = MaterialTheme.typography.titleMedium
+    )
+
+    Text(
+        text = message,
+        modifier =
+            Modifier.padding(start = Dimens.smallPadding, top = Dimens.cellTopPadding)
+                .fillMaxWidth(),
+        color = MaterialTheme.colorScheme.onPrimary.copy(alpha = AlphaDescription),
+        style = MaterialTheme.typography.labelMedium
+    )
+}
+
+@Composable
+private fun EnterVoucherBody(
+    uiState: VoucherDialogUiState,
+    onVoucherInputChange: (String) -> Unit = {},
+    onRedeem: (voucherCode: String) -> Unit
+) {
+    val textFieldFocusRequester = FocusRequester()
+    Box(Modifier.wrapContentSize().clickable { textFieldFocusRequester.requestFocus() }) {
+        GroupedTextField(
+            value = uiState.voucherInput,
+            onSubmit = { input ->
+                if (uiState.voucherInput.length == VOUCHER_LENGTH) {
+                    onRedeem(input)
+                }
+            },
+            onValueChanged = { input -> onVoucherInputChange(input.uppercase()) },
+            isValidValue = uiState.voucherInput.isNotEmpty(),
+            keyboardType = KeyboardType.Password,
+            placeholderText = stringResource(id = R.string.voucher_hint),
+            placeHolderColor =
+                MaterialTheme.colorScheme.onPrimary
+                    .copy(alpha = AlphaDisabled)
+                    .compositeOver(MaterialTheme.colorScheme.primary),
+            visualTransformation = vouchersVisualTransformation(),
+            maxCharLength = VOUCHER_LENGTH,
+            onFocusChange = {},
+            isDigitsOnlyAllowed = false,
+            isEnabled = true,
+            modifier = Modifier.focusRequester(textFieldFocusRequester),
+            validateRegex = "^[A-Za-z0-9]*$".toRegex()
+        )
+    }
+    Spacer(modifier = Modifier.height(Dimens.smallPadding))
+    Row(
+        verticalAlignment = Alignment.CenterVertically,
+        modifier = Modifier.height(Dimens.listIconSize).fillMaxWidth()
+    ) {
+        if (uiState.voucherViewModelState is VoucherDialogState.Verifying) {
+            CircularProgressIndicator(
+                modifier =
+                    Modifier.height(Dimens.loadingSpinnerSizeMedium)
+                        .width(Dimens.loadingSpinnerSizeMedium),
+                color = MaterialTheme.colorScheme.onSecondary
+            )
+            Text(
+                text = stringResource(id = R.string.verifying_voucher),
+                modifier = Modifier.padding(start = Dimens.smallPadding),
+                color = MaterialTheme.colorScheme.onPrimary,
+                style = MaterialTheme.typography.bodySmall
+            )
+        } else if (uiState.voucherViewModelState is VoucherDialogState.Error) {
+            Text(
+                text = uiState.voucherViewModelState.errorMessage,
+                color = MaterialTheme.colorScheme.error,
+                style = MaterialTheme.typography.bodySmall
+            )
+        }
+    }
+}

android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/screen/RedeemVoucherDialogScreen.kt

@@ -0,0 +1,32 @@
+package net.mullvad.mullvadvpn.compose.screen
+
+import android.content.res.Configuration
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.tooling.preview.Devices
+import androidx.compose.ui.tooling.preview.Preview
+import net.mullvad.mullvadvpn.compose.dialog.RedeemVoucherDialog
+import net.mullvad.mullvadvpn.compose.state.VoucherDialogUiState
+import net.mullvad.mullvadvpn.lib.theme.AppTheme
+
+@Preview(uiMode = Configuration.UI_MODE_NIGHT_YES, device = Devices.PIXEL_3)
+@Composable
+private fun PreviewRedeemVoucherDialogScreen() {
+    AppTheme {
+        RedeemVoucherDialogScreen(
+            uiState = VoucherDialogUiState.INITIAL,
+            onVoucherInputChange = {},
+            onRedeem = {},
+            onDismiss = {}
+        )
+    }
+}
+
+@Composable
+internal fun RedeemVoucherDialogScreen(
+    uiState: VoucherDialogUiState,
+    onVoucherInputChange: (String) -> Unit = {},
+    onRedeem: (voucherCode: String) -> Unit,
+    onDismiss: () -> Unit
+) {
+    RedeemVoucherDialog(uiState, onVoucherInputChange, onRedeem, onDismiss)
+}

android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/util/VoucherVisualTransformation.kt

@@ -0,0 +1,38 @@
+package net.mullvad.mullvadvpn.compose.util
+
+import androidx.compose.ui.text.AnnotatedString
+import androidx.compose.ui.text.input.OffsetMapping
+import androidx.compose.ui.text.input.TransformedText
+import androidx.compose.ui.text.input.VisualTransformation
+import java.lang.Integer.min
+
+const val VOUCHER_SEPARATOR = "-"
+const val VOUCHER_CHUNK_SIZE = 4
+const val MAX_VOUCHER_LENGTH = 16
+
+fun vouchersVisualTransformation() = VisualTransformation { text ->
+    var out = text.chunked(VOUCHER_CHUNK_SIZE).joinToString(VOUCHER_SEPARATOR)
+    if (
+        text.length % VOUCHER_CHUNK_SIZE == 0 &&
+            text.isNotEmpty() &&
+            text.length < MAX_VOUCHER_LENGTH
+    ) {
+        out += VOUCHER_SEPARATOR
+    }
+    TransformedText(
+        AnnotatedString(out),
+        object : OffsetMapping {
+            override fun originalToTransformed(offset: Int): Int {
+                val res = offset + offset / ACCOUNT_TOKEN_CHUNK_SIZE
+                // Limit max input to 19 characters (16 voucher - 3 dividers)
+                return min(
+                    res,
+                    MAX_VOUCHER_LENGTH + MAX_VOUCHER_LENGTH / ACCOUNT_TOKEN_CHUNK_SIZE - 1
+                )
+            }
+
+            override fun transformedToOriginal(offset: Int): Int =
+                offset - offset / (ACCOUNT_TOKEN_CHUNK_SIZE + 1)
+        }
+    )
+}

android/app/src/main/kotlin/net/mullvad/mullvadvpn/constant/CommonConstant.kt

@@ -0,0 +1,3 @@
+package net.mullvad.mullvadvpn.constant
+
+const val VOUCHER_LENGTH = 16