Use formatter for LLS duration

libraries/dateformatter/impl/src/main/kotlin/io/element/android/libraries/dateformatter/impl/DefaultDurationFormatter.kt

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+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.libraries.dateformatter.impl
+
+import android.icu.text.MeasureFormat
+import android.icu.text.MeasureFormat.FormatWidth
+import android.icu.util.Measure
+import android.icu.util.MeasureUnit
+import android.text.format.DateUtils
+import dev.zacsweers.metro.AppScope
+import dev.zacsweers.metro.ContributesBinding
+import dev.zacsweers.metro.SingleIn
+import dev.zacsweers.metro.binding
+import io.element.android.libraries.dateformatter.api.DurationFormatter
+import java.util.Locale
+import kotlin.time.Duration
+import kotlin.time.Duration.Companion.hours
+import kotlin.time.Duration.Companion.minutes
+
+/**
+ * Formats durations in a localized, human-readable way using Android's MeasureFormat.
+ *
+ * Uses WIDE format for readability (e.g., "5 hours", "3 minutes", "10 seconds").
+ * Rounds to the nearest unit for cleaner display.
+ */
+@SingleIn(AppScope::class)
+@ContributesBinding(AppScope::class, binding = binding<DurationFormatter>())
+class DefaultDurationFormatter(
+    localeChangeObserver: LocaleChangeObserver,
+    locale: Locale,
+) : DurationFormatter, LocaleChangeListener {
+    init {
+        localeChangeObserver.addListener(this)
+    }
+
+    // Cache formatter, recreate only on locale change
+    private var formatter: MeasureFormat = MeasureFormat.getInstance(locale, FormatWidth.WIDE)
+
+    override fun onLocaleChange() {
+        formatter = MeasureFormat.getInstance(Locale.getDefault(), FormatWidth.WIDE)
+    }
+
+    override fun format(duration: Duration): String {
+        val millis = duration.inWholeMilliseconds
+
+        return when {
+            duration >= 1.hours -> {
+                // Round to nearest hour (add 30 minutes before dividing)
+                val hours = ((millis + 30 * DateUtils.MINUTE_IN_MILLIS) / DateUtils.HOUR_IN_MILLIS).toInt()
+                formatter.format(Measure(hours, MeasureUnit.HOUR))
+            }
+            duration >= 1.minutes -> {
+                // Round to nearest minute (add 30 seconds before dividing)
+                val minutes = ((millis + 30 * DateUtils.SECOND_IN_MILLIS) / DateUtils.MINUTE_IN_MILLIS).toInt()
+                formatter.format(Measure(minutes, MeasureUnit.MINUTE))
+            }
+            else -> {
+                // Round to nearest second (add 500ms before dividing)
+                val seconds = ((millis + 500) / DateUtils.SECOND_IN_MILLIS).toInt()
+                formatter.format(Measure(seconds, MeasureUnit.SECOND))
+            }
+        }
+    }
+}