Migrate to some newer date/time APIs

app/src/main/java/eu/kanade/tachiyomi/data/track/anilist/AnilistApi.kt

@@ -26,7 +26,10 @@ import okhttp3.OkHttpClient
 import okhttp3.RequestBody.Companion.toRequestBody
 import tachiyomi.core.util.lang.withIOContext
 import uy.kohesive.injekt.injectLazy
-import java.util.Calendar
+import java.time.Instant
+import java.time.LocalDate
+import java.time.ZoneId
+import java.time.ZonedDateTime
 import kotlin.time.Duration.Companion.minutes
 
 class AnilistApi(val client: OkHttpClient, interceptor: AnilistInterceptor) {
@@ -328,13 +331,15 @@ class AnilistApi(val client: OkHttpClient, interceptor: AnilistInterceptor) {
 
     private fun parseDate(struct: JsonObject, dateKey: String): Long {
         return try {
-            val date = Calendar.getInstance()
-            date.set(
-                struct[dateKey]!!.jsonObject["year"]!!.jsonPrimitive.int,
-                struct[dateKey]!!.jsonObject["month"]!!.jsonPrimitive.int - 1,
-                struct[dateKey]!!.jsonObject["day"]!!.jsonPrimitive.int,
-            )
-            date.timeInMillis
+            return LocalDate
+                .of(
+                    struct[dateKey]!!.jsonObject["year"]!!.jsonPrimitive.int,
+                    struct[dateKey]!!.jsonObject["month"]!!.jsonPrimitive.int,
+                    struct[dateKey]!!.jsonObject["day"]!!.jsonPrimitive.int,
+                )
+                .atStartOfDay(ZoneId.systemDefault())
+                .toInstant()
+                .toEpochMilli()
         } catch (_: Exception) {
             0L
         }
@@ -349,12 +354,11 @@ class AnilistApi(val client: OkHttpClient, interceptor: AnilistInterceptor) {
             }
         }
 
-        val calendar = Calendar.getInstance()
-        calendar.timeInMillis = dateValue
+        val dateTime = ZonedDateTime.ofInstant(Instant.ofEpochMilli(dateValue), ZoneId.systemDefault())
         return buildJsonObject {
-            put("year", calendar.get(Calendar.YEAR))
-            put("month", calendar.get(Calendar.MONTH) + 1)
-            put("day", calendar.get(Calendar.DAY_OF_MONTH))
+            put("year", dateTime.year)
+            put("month", dateTime.monthValue)
+            put("day", dateTime.dayOfMonth)
         }
     }