Reimplement MAL start/end date support

app/src/main/java/eu/kanade/tachiyomi/data/track/myanimelist/MyAnimeList.kt

@@ -33,6 +33,8 @@ class MyAnimeList(private val context: Context, id: Int) : TrackService(id) {
     override val name: String
         get() = "MyAnimeList"
 
+    override val supportsReadingDates: Boolean = true
+
     override fun getLogo() = R.drawable.ic_tracker_mal
 
     override fun getLogoColor() = Color.rgb(46, 81, 162)

app/src/main/java/eu/kanade/tachiyomi/data/track/myanimelist/MyAnimeListApi.kt

@@ -132,6 +132,7 @@ class MyAnimeListApi(private val client: OkHttpClient, interceptor: MyAnimeListI
             val formBody: RequestBody = FormBody.Builder()
                 .add("status", "reading")
                 .add("score", "0")
+                .add("start_date", convertToIsoDate(System.currentTimeMillis())!!)
                 .build()
             val request = Request.Builder()
                 .url(mangaUrl(track.media_id).toString())
@@ -146,15 +147,21 @@ class MyAnimeListApi(private val client: OkHttpClient, interceptor: MyAnimeListI
 
     suspend fun updateItem(track: Track): Track {
         return withIOContext {
-            val formBody: RequestBody = FormBody.Builder()
+            val formBodyBuilder = FormBody.Builder()
                 .add("status", track.toMyAnimeListStatus() ?: "reading")
                 .add("is_rereading", (track.status == MyAnimeList.REREADING).toString())
                 .add("score", track.score.toString())
                 .add("num_chapters_read", track.last_chapter_read.toString())
-                .build()
+            convertToIsoDate(track.started_reading_date)?.let {
+                formBodyBuilder.add("start_date", it)
+            }
+            convertToIsoDate(track.finished_reading_date)?.let {
+                formBodyBuilder.add("finish_date", it)
+            }
+
             val request = Request.Builder()
                 .url(mangaUrl(track.media_id).toString())
-                .put(formBody)
+                .put(formBodyBuilder.build())
                 .build()
             authClient.newCall(request)
                 .await()
@@ -233,6 +240,28 @@ class MyAnimeListApi(private val client: OkHttpClient, interceptor: MyAnimeListI
             status = if (isRereading) MyAnimeList.REREADING else getStatus(obj["status"]!!.jsonPrimitive.content)
             last_chapter_read = obj["num_chapters_read"]!!.jsonPrimitive.int
             score = obj["score"]!!.jsonPrimitive.int.toFloat()
+            obj["start_date"]?.let {
+                started_reading_date = parseDate(it.jsonPrimitive.content)
+            }
+            obj["finish_date"]?.let {
+                finished_reading_date = parseDate(it.jsonPrimitive.content)
+            }
+        }
+    }
+
+    private fun parseDate(isoDate: String): Long {
+        return SimpleDateFormat("yyyy-MM-dd", Locale.US).parse(isoDate)?.time ?: 0L
+    }
+
+    private fun convertToIsoDate(epochTime: Long): String? {
+        if (epochTime == 0L) {
+            return ""
+        }
+        return try {
+            val outputDf = SimpleDateFormat("yyyy-MM-dd", Locale.US)
+            outputDf.format(epochTime)
+        } catch (e: Exception) {
+            null
         }
     }