[+] New maimai api

src/main/java/icu/samnyan/aqua/api/controller/sega/game/maimai2/Maimai2New.kt

@@ -0,0 +1,30 @@
+package icu.samnyan.aqua.api.controller.sega.game.maimai2
+
+import icu.samnyan.aqua.sega.maimai2.dao.userdata.UserPlaylogRepository
+import icu.samnyan.aqua.sega.maimai2.model.userdata.UserPlaylog
+import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.RequestMapping
+import org.springframework.web.bind.annotation.RequestParam
+import org.springframework.web.bind.annotation.RestController
+import java.util.*
+
+@RestController
+@RequestMapping("api/game/maimai2new")
+class Maimai2New(
+    private val userPlaylogRepository: UserPlaylogRepository
+)
+{
+    data class TrendOut(val date: String, val rating: Int)
+
+    @GetMapping("trend")
+    fun trend(@RequestParam userId: Long): List<TrendOut> {
+        // O(n log n) sort TODO: It might be possible to optimize this
+        val d = userPlaylogRepository.findByUser_Card_ExtId(userId).sortedBy { it.playDate }.toList()
+
+        // Assume it's sorted by date, map the values O(n)
+        val map = d.associate { it.playDate to it.afterRating }
+
+        // Is sorting here necessary?
+        return map.map { TrendOut(it.key, it.value) }.sortedBy { it.date }
+    }
+}