1 files changed, 45 insertions, 1 deletions

diff --git a/ui/src/main/java/com/wireguard/android/util/QuantityFormatter.kt b/ui/src/main/java/com/wireguard/android/util/QuantityFormatter.kt
index 4a9ffed4..f7de2465 100644
--- a/ui/src/main/java/com/wireguard/android/util/QuantityFormatter.kt
+++ b/ui/src/main/java/com/wireguard/android/util/QuantityFormatter.kt
@@ -1,12 +1,20 @@
 /*
- * Copyright © 2017-2021 WireGuard LLC. All Rights Reserved.
+ * Copyright © 2017-2023 WireGuard LLC. All Rights Reserved.
  * SPDX-License-Identifier: Apache-2.0
  */
 
 package com.wireguard.android.util
 
+import android.icu.text.ListFormatter
+import android.icu.text.MeasureFormat
+import android.icu.text.RelativeDateTimeFormatter
+import android.icu.util.Measure
+import android.icu.util.MeasureUnit
+import android.os.Build
 import com.wireguard.android.Application
 import com.wireguard.android.R
+import java.util.Locale
+import kotlin.time.Duration.Companion.seconds
 
 object QuantityFormatter {
     fun formatBytes(bytes: Long): String {
@@ -19,4 +27,40 @@ object QuantityFormatter {
             else -> context.getString(R.string.transfer_tibibytes, bytes / (1024.0 * 1024.0 * 1024.0) / 1024.0)
         }
     }
+
+    fun formatEpochAgo(epochMillis: Long): String {
+        var span = (System.currentTimeMillis() - epochMillis) / 1000
+
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N)
+            return Application.get().applicationContext.getString(R.string.latest_handshake_ago, span.seconds.toString())
+
+        if (span <= 0L)
+            return RelativeDateTimeFormatter.getInstance().format(RelativeDateTimeFormatter.Direction.PLAIN, RelativeDateTimeFormatter.AbsoluteUnit.NOW)
+        val measureFormat = MeasureFormat.getInstance(Locale.getDefault(), MeasureFormat.FormatWidth.WIDE)
+        val parts = ArrayList<CharSequence>(4)
+        if (span >= 24 * 60 * 60L) {
+            val v = span / (24 * 60 * 60L)
+            parts.add(measureFormat.format(Measure(v, MeasureUnit.DAY)))
+            span -= v * (24 * 60 * 60L)
+        }
+        if (span >= 60 * 60L) {
+            val v = span / (60 * 60L)
+            parts.add(measureFormat.format(Measure(v, MeasureUnit.HOUR)))
+            span -= v * (60 * 60L)
+        }
+        if (span >= 60L) {
+            val v = span / 60L
+            parts.add(measureFormat.format(Measure(v, MeasureUnit.MINUTE)))
+            span -= v * 60L
+        }
+        if (span > 0L)
+            parts.add(measureFormat.format(Measure(span, MeasureUnit.SECOND)))
+
+        val joined = if (Build.VERSION.SDK_INT < Build.VERSION_CODES.TIRAMISU)
+            parts.joinToString()
+        else
+            ListFormatter.getInstance(Locale.getDefault(), ListFormatter.Type.UNITS, ListFormatter.Width.SHORT).format(parts)
+
+        return Application.get().applicationContext.getString(R.string.latest_handshake_ago, joined)
+    }
 }
\ No newline at end of file