Support getTimestamp in android

commit_hash:7475956d89071e33339c71f4a35eb4f73065e47b

client/android/div-evaluable/src/main/java/com/yandex/div/evaluable/function/BuiltinFunctionProvider.kt

@@ -119,6 +119,7 @@ internal object BuiltinFunctionProvider : FunctionProvider {
         registry.register(GetMinutes)
         registry.register(GetSeconds)
         registry.register(GetMillis)
+        registry.register(GetTimestamp)
         registry.register(FormatDateAsLocal)
         registry.register(FormatDateAsUTC)
         registry.register(FormatDateAsLocalWithLocale)

client/android/div-evaluable/src/main/java/com/yandex/div/evaluable/function/DateTimeFunctions.kt

@@ -530,6 +530,26 @@ internal object GetMillis : Function() {
     }
 }
 
+internal object GetTimestamp : Function() {
+
+    override val name = "getTimestamp"
+
+    override val declaredArgs = listOf(
+        FunctionArgument(type = EvaluableType.DATETIME)
+    )
+    override val resultType = EvaluableType.INTEGER
+    override val isPure = true
+
+    override fun evaluate(
+        evaluationContext: EvaluationContext,
+        expressionContext: ExpressionContext,
+        args: List<Any>
+    ): Any {
+        val datetime = args[0] as DateTime
+        return datetime.timestampMillis
+    }
+}
+
 internal object FormatDateAsLocal : Function() {
     override val name = "formatDateAsLocal"
 

client/android/div-evaluable/src/test/java/com/yandex/div/evaluable/function/DateTimeFunctionsTest.kt

@@ -97,4 +97,21 @@ class DateTimeFunctionsTest {
 
         Assert.assertEquals(dateTime.toString(), formattedDateTime)
     }
+
+    @Test
+    fun getTimestampReturnsDateTimeInMilliseconds() {
+        val timestampMillis = 1772107200000L
+        val dateTime = DateTime(
+            timestampMillis,
+            TimeZone.getTimeZone("GMT+1")
+        )
+
+        val result = GetTimestamp.invoke(
+            evaluationContext,
+            expressionContext,
+            args = listOf(dateTime)
+        )
+
+        Assert.assertEquals(timestampMillis, result)
+    }
 }

expression-api/translations.json

@@ -752,6 +752,14 @@
     "en": "Datetime value, date to get milliseconds.",
     "ru": "Значение даты и времени, дата для получения миллисекунд."
   },
+  "gettimestamp_datetime": {
+    "en": "Returns the datetime value as timestamp in milliseconds.",
+    "ru": "Возвращает значение даты и времени в миллисекундах."
+  },
+  "gettimestamp_datetime_arg0": {
+    "en": "Datetime value to convert to timestamp in milliseconds.",
+    "ru": "Значение даты и времени для преобразования в миллисекунды."
+  },
   "getminutes_datetime": {
     "en": "Returns minutes number of original date.",
     "ru": "Возвращает значение минут исходной даты."