From 023ea96d26a65d29d408ef78c9405411bb842afd Mon Sep 17 00:00:00 2001
From: Florian Dold <florian@dold.me>
Date: Mon, 16 May 2022 19:58:31 +0200
Subject: -remove multiplatform dependency, library upgrade WIP

---
 .../src/main/java/net/taler/common/Time.kt         | 129 +++++++++++++++++++++
 1 file changed, 129 insertions(+)
 create mode 100644 taler-kotlin-android/src/main/java/net/taler/common/Time.kt

(limited to 'taler-kotlin-android/src/main/java/net/taler/common/Time.kt')

diff --git a/taler-kotlin-android/src/main/java/net/taler/common/Time.kt b/taler-kotlin-android/src/main/java/net/taler/common/Time.kt
new file mode 100644
index 0000000..61bbce8
--- /dev/null
+++ b/taler-kotlin-android/src/main/java/net/taler/common/Time.kt
@@ -0,0 +1,129 @@
+/*
+ * This file is part of GNU Taler
+ * (C) 2020 Taler Systems S.A.
+ *
+ * GNU Taler is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 3, or (at your option) any later version.
+ *
+ * GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+package net.taler.common
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.builtins.serializer
+import kotlinx.serialization.json.JsonElement
+import kotlinx.serialization.json.JsonPrimitive
+import kotlinx.serialization.json.JsonTransformingSerializer
+import kotlinx.serialization.json.contentOrNull
+import kotlinx.serialization.json.jsonPrimitive
+import kotlinx.serialization.json.longOrNull
+import kotlin.math.max
+
+@Serializable
+data class Timestamp(
+    @SerialName("t_ms")
+    @Serializable(NeverSerializer::class)
+    val old_ms: Long? = null,
+    @SerialName("t_s")
+    @Serializable(NeverSerializer::class)
+    private val s: Long? = null,
+) : Comparable<Timestamp> {
+
+    constructor(ms: Long) : this(ms, null)
+
+    companion object {
+        private const val NEVER: Long = -1
+        fun now(): Timestamp = Timestamp(System.currentTimeMillis())
+        fun never(): Timestamp = Timestamp(NEVER)
+    }
+
+    val ms: Long = if (s != null) {
+        s * 1000L
+    } else if (old_ms !== null) {
+        old_ms
+    } else  {
+        throw Exception("timestamp didn't have t_s or t_ms")
+    }
+
+
+    /**
+     * Returns a copy of this [Timestamp] rounded to seconds.
+     */
+    fun truncateSeconds(): Timestamp {
+        if (ms == NEVER) return Timestamp(ms)
+        return Timestamp((ms / 1000L) * 1000L)
+    }
+
+    operator fun minus(other: Timestamp): Duration = when {
+        ms == NEVER -> Duration(Duration.FOREVER)
+        other.ms == NEVER -> throw Error("Invalid argument for timestamp comparision")
+        ms < other.ms -> Duration(0)
+        else -> Duration(ms - other.ms)
+    }
+
+    operator fun minus(other: Duration): Timestamp = when {
+        ms == NEVER -> this
+        other.ms == Duration.FOREVER -> Timestamp(0)
+        else -> Timestamp(max(0, ms - other.ms))
+    }
+
+    override fun compareTo(other: Timestamp): Int {
+        return if (ms == NEVER) {
+            if (other.ms == NEVER) 0
+            else 1
+        } else {
+            if (other.ms == NEVER) -1
+            else ms.compareTo(other.ms)
+        }
+    }
+
+}
+
+@Serializable
+data class Duration(
+    @SerialName("d_ms")
+    @Serializable(ForeverSerializer::class) val old_ms: Long? = null,
+    @SerialName("d_s")
+    @Serializable(ForeverSerializer::class)
+    private val s: Long? = null,
+) {
+    val ms: Long = if (s != null) {
+        s * 1000L
+    } else if (old_ms !== null) {
+        old_ms
+    } else  {
+        throw Exception("duration didn't have d_s or d_ms")
+    }
+
+    constructor(ms: Long) : this(ms, null)
+
+    companion object {
+        internal const val FOREVER: Long = -1
+        fun forever(): Duration = Duration(FOREVER)
+    }
+}
+
+internal abstract class MinusOneSerializer(private val keyword: String) :
+    JsonTransformingSerializer<Long>(Long.serializer()) {
+
+    override fun transformDeserialize(element: JsonElement): JsonElement {
+        return if (element.jsonPrimitive.contentOrNull == keyword) return JsonPrimitive(-1)
+        else super.transformDeserialize(element)
+    }
+
+    override fun transformSerialize(element: JsonElement): JsonElement {
+        return if (element.jsonPrimitive.longOrNull == -1L) return JsonPrimitive(keyword)
+        else element
+    }
+}
+
+internal object NeverSerializer : MinusOneSerializer("never")
+internal object ForeverSerializer : MinusOneSerializer("forever")
-- 
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