Improved transaction detail UI and behavior.

Differentiate pending transactions, show address when we can parse it from the memo, allow address copy.

app/src/main/java/cash/z/ecc/android/ui/detail/TransactionViewHolder.kt

@@ -2,11 +2,15 @@ package cash.z.ecc.android.ui.detail
 
 import android.view.View
 import android.widget.TextView
+import android.widget.Toast
 import androidx.recyclerview.widget.RecyclerView
 import cash.z.ecc.android.R
 import cash.z.ecc.android.ext.goneIf
 import cash.z.ecc.android.ext.toAppColor
 import cash.z.ecc.android.ui.MainActivity
+import cash.z.ecc.android.ui.send.SendViewModel
+import cash.z.ecc.android.ui.util.INCLUDE_MEMO_PREFIX
+import cash.z.ecc.android.ui.util.toUtf8Memo
 import cash.z.wallet.sdk.entity.ConfirmedTransaction
 import cash.z.wallet.sdk.ext.*
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
@@ -21,6 +25,7 @@ class TransactionViewHolder<T : ConfirmedTransaction>(itemView: View) : Recycler
     private val bottomText = itemView.findViewById<TextView>(R.id.text_transaction_bottom)
     private val shieldIcon = itemView.findViewById<View>(R.id.image_shield)
     private val formatter = SimpleDateFormat("M/d h:mma", Locale.getDefault())
+    private val addressRegex = """zs\d\w{65,}""".toRegex()
 
     fun bindTo(transaction: T?) {
 
@@ -29,13 +34,19 @@ class TransactionViewHolder<T : ConfirmedTransaction>(itemView: View) : Recycler
         var lineTwo: String = ""
         var amountZec: String = ""
         var amountDisplay: String = ""
-        var amountColor: Int = 0
-        var indicatorBackground: Int = 0
+        var amountColor: Int = R.color.text_light_dimmed
+        var lineOneColor: Int = R.color.text_light
+        var lineTwoColor: Int = R.color.text_light_dimmed
+        var indicatorBackground: Int = R.drawable.background_indicator_unknown
 
         transaction?.apply {
             itemView.setOnClickListener {
                 onTransactionClicked(this)
             }
+            itemView.setOnLongClickListener {
+                onTransactionLongPressed(this)
+                true
+            }
             amountZec = value.convertZatoshiToZecString()
             // TODO: these might be good extension functions
             val timestamp = formatter.format(blockTimeInSeconds * 1000L)
@@ -45,11 +56,16 @@ class TransactionViewHolder<T : ConfirmedTransaction>(itemView: View) : Recycler
                     lineOne = "You paid ${toAddress?.toAbbreviatedAddress()}"
                     lineTwo = if (isMined) "Sent $timestamp" else "Pending confirmation"
                     amountDisplay = "- $amountZec"
-                    amountColor = R.color.zcashRed
-                    indicatorBackground = R.drawable.background_indicator_outbound
+                    if (isMined) {
+                        amountColor = R.color.zcashRed
+                        indicatorBackground = R.drawable.background_indicator_outbound
+                    } else {
+                        lineOneColor = R.color.text_light_dimmed
+                        lineTwoColor = R.color.text_light
+                    }
                 }
-                raw == null || raw?.isEmpty() == true -> {
-                    lineOne = "Unknown paid you"
+                toAddress.isNullOrEmpty() && value > 0L && minedHeight > 0 -> {
+                    lineOne = getSender(transaction)
                     lineTwo = "Received $timestamp"
                     amountDisplay = "+ $amountZec"
                     amountColor = R.color.zcashGreen
@@ -58,9 +74,10 @@ class TransactionViewHolder<T : ConfirmedTransaction>(itemView: View) : Recycler
                 else -> {
                     lineOne = "Unknown"
                     lineTwo = "Unknown"
+                    amountDisplay = "$amountZec"
+                    amountColor = R.color.text_light
                 }
             }
-
             // sanitize amount
             if (value < ZcashSdk.MINERS_FEE_ZATOSHI) amountDisplay = "< 0.001"
             else if (amountZec.length > 10) { // 10 allows 3 digits to the left and 6 to the right of the decimal
@@ -73,17 +90,41 @@ class TransactionViewHolder<T : ConfirmedTransaction>(itemView: View) : Recycler
         bottomText.text = lineTwo
         amountText.text = amountDisplay
         amountText.setTextColor(amountColor.toAppColor())
+        topText.setTextColor(lineOneColor.toAppColor())
+        bottomText.setTextColor(lineTwoColor.toAppColor())
         val context = itemView.context
         indicator.background = context.resources.getDrawable(indicatorBackground)
         shieldIcon.goneIf((transaction?.raw != null || transaction?.expiryHeight != null) && !transaction?.toAddress.isShielded())
     }
 
+    private fun getSender(transaction: ConfirmedTransaction): String {
+        val memo = transaction.memo.toUtf8Memo()
+        return when {
+            memo.contains(INCLUDE_MEMO_PREFIX) -> {
+                val address = memo.split(INCLUDE_MEMO_PREFIX)[1].trim()
+                "${address.toAbbreviatedAddress()} paid you"
+            }
+            memo.contains("eply to:") -> {
+                val address = memo.split("eply to:")[1].trim()
+                "${address.toAbbreviatedAddress()} paid you"
+            }
+            memo.contains("zs") -> {
+                val who = extractAddress(memo)?.toAbbreviatedAddress() ?: "Unknown"
+                "$who paid you"
+            }
+            else -> "Unknown paid you"
+        }
+    }
+
+    private fun extractAddress(memo: String?) =
+        addressRegex.findAll(memo ?: "").lastOrNull()?.value
+
     private fun onTransactionClicked(transaction: ConfirmedTransaction) {
         val txId = transaction.rawTransactionId.toTxId()
         val detailsMessage: String = "Zatoshi amount: ${transaction.value}\n\n" +
                 "Transaction: $txId" +
-                "${if (transaction.toAddress != null) "\n\nto: ${transaction.toAddress}" else ""}" +
-                "${if (transaction.memo != null) "\n\nmemo: \n${String(transaction.memo!!, Charset.forName("UTF-8"))}" else ""}"
+                "${if (transaction.toAddress != null) "\n\nTo: ${transaction.toAddress}" else ""}" +
+                "${if (transaction.memo != null) "\n\nMemo: \n${String(transaction.memo!!, Charset.forName("UTF-8"))}" else ""}"
 
         MaterialAlertDialogBuilder(itemView.context)
             .setMessage(detailsMessage)
@@ -98,6 +139,12 @@ class TransactionViewHolder<T : ConfirmedTransaction>(itemView: View) : Recycler
             }
             .show()
     }
+
+    private fun onTransactionLongPressed(transaction: ConfirmedTransaction) {
+        (transaction.toAddress ?: extractAddress(transaction.memo.toUtf8Memo()))?.let {
+            (itemView.context as MainActivity).copyText(it, "Transaction Address")
+        }
+    }
 }
 
 private fun ByteArray.toTxId(): String {

app/src/main/java/cash/z/ecc/android/ui/util/MemoUtil.kt

@@ -0,0 +1,28 @@
+package cash.z.ecc.android.ui.util
+
+import java.nio.charset.StandardCharsets
+
+
+const val INCLUDE_MEMO_PREFIX = "sent from"
+
+inline fun ByteArray?.toUtf8Memo(): String {
+// TODO: make this more official but for now, this will do
+    return if (this == null || this[0] >= 0xF5) "" else try {
+        String(this, StandardCharsets.UTF_8).trim('\u0000')
+    } catch (t: Throwable) {
+        "unable to parse memo"
+    }
+}
+
+
+/*
+        if self.0[0] < 0xF5 {
+            // Check if it is valid UTF8
+            Some(str::from_utf8(&self.0).map(|memo| {
+                // Drop trailing zeroes
+                memo.trim_end_matches(char::from(0)).to_owned()
+            }))
+        } else {
+            None
+        }
+ */

app/src/main/res/drawable/background_indicator_unknown.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape
+    xmlns:android="http://schemas.android.com/apk/res/android">
+    <corners android:radius="4dp" />
+    <gradient
+        android:angle="270"
+        android:endColor="@color/zcashWhite_12"
+        android:startColor="@color/zcashWhite_60" />
+</shape>