refactor: Refactor database manager to json manager

* Because a SQLite package resulted in too large jar package, I decided to abandon SQLite and use JSON to store player data
* Add interface DataService for possible future expansions

build.gradle.kts

@@ -41,14 +41,12 @@ dependencies {
     modImplementation(libs.translations)
 
     // For debug
-    modImplementation(libs.bundles.database)
-    modImplementation(libs.bundles.jdbc)
     modImplementation(libs.bundles.konf)
+    modImplementation(libs.gson)
 
     // For release
-    shadow(libs.bundles.database)
-    shadow(libs.bundles.jdbc)
     shadow(libs.bundles.konf)
+    shadow(libs.gson)
 }
 
 base {

detekt.yml

@@ -250,8 +250,6 @@ style:
   DataClassContainsFunctions:
     active: true
     allowOperators: true
-  DataClassShouldBeImmutable:
-    active: true
   DestructuringDeclarationWithTooManyEntries:
     active: false
   ForbiddenComment:

libs.versions.toml

@@ -9,9 +9,7 @@ yarn-mappings = "1.21.1+build.3"
 translations = "2.3.1+1.21-pre2"
 detekt = "1.23.7"
 konf = "1.1.2"
-
-exposed = "0.54.0"
-sqlite-jdbc = "3.46.1.0"
+gson = "2.11.0"
 
 [libraries]
 minecraft = { module = "net.minecraft:minecraft", version.ref = "minecraft" }
@@ -25,17 +23,11 @@ konf-core = { module = "com.uchuhimo:konf-core", version.ref = "konf"}
 konf-toml = { module = "com.uchuhimo:konf-toml", version.ref = "konf"}
 translations = { module = "xyz.nucleoid:server-translations-api", version.ref = "translations" }
 
-exposed-core = { module = "org.jetbrains.exposed:exposed-core", version.ref = "exposed" }
-exposed-dao = { module = "org.jetbrains.exposed:exposed-dao", version.ref = "exposed" }
-exposed-jdbc = { module = "org.jetbrains.exposed:exposed-jdbc", version.ref = "exposed" }
-exposed-java-time = { module = "org.jetbrains.exposed:exposed-java-time", version.ref = "exposed" }
-sqlite-jdbc = { module = "org.xerial:sqlite-jdbc", version.ref = "sqlite-jdbc" }
+gson = {module = "com.google.code.gson:gson", version.ref="gson"}
 
 [bundles]
 fabric = ["fabric-api", "fabric-kotlin", "fabric-loader"]
 konf = ["konf-core", "konf-toml"]
-database = ["exposed-core", "exposed-dao", "exposed-java-time", "exposed-jdbc"]
-jdbc = ["sqlite-jdbc"]
 
 [plugins]
 kotlin = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }

src/main/kotlin/net/superricky/tpaplusplus/GlobalConst.kt

@@ -8,6 +8,7 @@ object GlobalConst {
     const val CONFIG_FOLDER_PATH = MOD_ID
     const val CONFIG_FILE_NAME = "$MOD_ID.toml"
     const val CONFIG_FILE_PATH = "$CONFIG_FOLDER_PATH/$CONFIG_FILE_NAME"
+    const val PLAYER_DATA_FILE_NAME = "$MOD_ID.json"
 
     const val GITHUB_URL = "https://github.com/SuperRicky14/TpaPlusPlus"
     const val MODRINTH_URL = "https://modrinth.com/mod/tpa++"

src/main/kotlin/net/superricky/tpaplusplus/TpaPlusPlus.kt

@@ -7,7 +7,6 @@ import dev.architectury.event.events.common.TickEvent
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.cancel
-import kotlinx.coroutines.launch
 import net.fabricmc.api.ModInitializer
 import net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents
 import net.fabricmc.loader.api.FabricLoader
@@ -22,7 +21,8 @@ import net.superricky.tpaplusplus.async.AsyncCommandHelper
 import net.superricky.tpaplusplus.command.CommandRegister
 import net.superricky.tpaplusplus.config.AdvancedSpec
 import net.superricky.tpaplusplus.config.Config
-import net.superricky.tpaplusplus.database.DatabaseManager
+import net.superricky.tpaplusplus.database.DataService
+import net.superricky.tpaplusplus.database.PlayerDataManager
 import java.nio.file.Files
 import kotlin.coroutines.CoroutineContext
 import net.superricky.tpaplusplus.event.PlayerEvent as PlayerEventListener
@@ -31,6 +31,7 @@ object TpaPlusPlus : ModInitializer, CoroutineScope {
     lateinit var server: MinecraftServer
     override val coroutineContext: CoroutineContext = Dispatchers.IO
     val version: Version = FabricLoader.getInstance().getModContainer(MOD_ID).get().metadata.version
+    var dataService: DataService = PlayerDataManager
 
     override fun onInitialize() {
         logger.info("Initializing TPA++ ${version.friendlyString}")
@@ -76,15 +77,8 @@ object TpaPlusPlus : ModInitializer, CoroutineScope {
         logger.info("Main logic initializing...")
         this.server = server
 
-        logger.info("Database initializing...")
-        DatabaseManager.setup()
-        DatabaseManager.ensureTables()
-
-        logger.info("Make database cache...")
-        launch {
-            DatabaseManager.setupCache()
-            logger.info("The database cache is successfully constructed")
-        }
+        logger.info("Data service initializing...")
+        dataService.initDataService()
 
         logger.info("Add player event listener...")
         PlayerEvent.PLAYER_JOIN.register(PlayerEventListener::joinEvent)
@@ -108,5 +102,6 @@ object TpaPlusPlus : ModInitializer, CoroutineScope {
         logger.info("Shutting down TPA++")
         AsyncCommandHelper.stopTickLoop()
         coroutineContext.cancel()
+        dataService.savePlayerData()
     }
 }

src/main/kotlin/net/superricky/tpaplusplus/command/commands/BlockCommand.kt

@@ -17,7 +17,6 @@ import net.superricky.tpaplusplus.config.command.CommandCooldownSpec
 import net.superricky.tpaplusplus.config.command.CommandDelaySpec
 import net.superricky.tpaplusplus.config.command.CommandDistanceSpec
 import net.superricky.tpaplusplus.config.command.CommandNameSpec
-import net.superricky.tpaplusplus.database.DatabaseManager
 import net.superricky.tpaplusplus.utility.Context
 import net.superricky.tpaplusplus.utility.LiteralNode
 import net.superricky.tpaplusplus.utility.TextColorPallet
@@ -54,7 +53,7 @@ object BlockCommand : AsyncCommand(), BuildableCommand {
         sender!!
         target!!
         TpaPlusPlus.launch {
-            if (DatabaseManager.insertBlockedPlayer(sender.uuid, target.uuid)) {
+            if (TpaPlusPlus.dataService.addBlockPlayer(sender.uuid, target.uuid)) {
                 source.sendFeedback(
                     {
                         Text.translatable(

src/main/kotlin/net/superricky/tpaplusplus/command/commands/ToggleCommand.kt

@@ -13,7 +13,6 @@ import net.superricky.tpaplusplus.config.command.CommandCooldownSpec
 import net.superricky.tpaplusplus.config.command.CommandDelaySpec
 import net.superricky.tpaplusplus.config.command.CommandDistanceSpec
 import net.superricky.tpaplusplus.config.command.CommandNameSpec
-import net.superricky.tpaplusplus.database.DatabaseManager
 import net.superricky.tpaplusplus.utility.Context
 import net.superricky.tpaplusplus.utility.LiteralNode
 import net.superricky.tpaplusplus.utility.toggleOff
@@ -53,7 +52,7 @@ object ToggleCommand : AsyncCommand(), BuildableCommand {
         val sender = source.player
         sender ?: return CommandResult.SENDER_NOT_EXIST.status
         TpaPlusPlus.launch {
-            val blocked = DatabaseManager.playerSwitchBlock(sender.uuid)
+            val blocked = TpaPlusPlus.dataService.playerSwitchBlock(sender.uuid)
             if (blocked) {
                 source.sendFeedback({ Text.translatable("command.toggle.success.on") }, false)
             } else {

src/main/kotlin/net/superricky/tpaplusplus/command/commands/UnblockCommand.kt

@@ -17,7 +17,6 @@ import net.superricky.tpaplusplus.config.command.CommandCooldownSpec
 import net.superricky.tpaplusplus.config.command.CommandDelaySpec
 import net.superricky.tpaplusplus.config.command.CommandDistanceSpec
 import net.superricky.tpaplusplus.config.command.CommandNameSpec
-import net.superricky.tpaplusplus.database.DatabaseManager
 import net.superricky.tpaplusplus.utility.Context
 import net.superricky.tpaplusplus.utility.LiteralNode
 import net.superricky.tpaplusplus.utility.TextColorPallet
@@ -54,7 +53,7 @@ object UnblockCommand : AsyncCommand(), BuildableCommand {
         sender!!
         target!!
         TpaPlusPlus.launch {
-            if (DatabaseManager.deleteBlockedPlayer(sender.uuid, target.uuid)) {
+            if (TpaPlusPlus.dataService.removeBlockPlayer(sender.uuid, target.uuid)) {
                 source.sendFeedback(
                     {
                         Text.translatable(

src/main/kotlin/net/superricky/tpaplusplus/database/DataService.kt

@@ -0,0 +1,17 @@
+package net.superricky.tpaplusplus.database
+
+import net.minecraft.server.network.ServerPlayerEntity
+import net.superricky.tpaplusplus.utility.LevelBoundVec3
+import java.util.*
+
+interface DataService {
+    fun initDataService()
+    fun getPlayerData(player: ServerPlayerEntity): PlayerData
+    fun addBlockPlayer(uuid: UUID, blockPlayer: UUID): Boolean
+    fun removeBlockPlayer(uuid: UUID, blockPlayer: UUID): Boolean
+    fun playerSwitchBlock(uuid: UUID): Boolean
+    fun playerSwitchBlock(uuid: UUID, toggle: Boolean): Boolean
+    fun insertPlayer(uuid: UUID)
+    fun insertDeath(uuid: UUID, pos: LevelBoundVec3)
+    fun savePlayerData()
+}

src/main/kotlin/net/superricky/tpaplusplus/database/DeathPos.kt

@@ -0,0 +1,9 @@
+package net.superricky.tpaplusplus.database
+
+data class DeathPos(
+    var x: Double = 0.0,
+    var y: Double = 0.0,
+    var z: Double = 0.0,
+    var world: String = "",
+    var backed: Boolean = true
+)

src/main/kotlin/net/superricky/tpaplusplus/database/PlayerData.kt

@@ -0,0 +1,13 @@
+package net.superricky.tpaplusplus.database
+
+import com.google.gson.annotations.SerializedName
+import java.util.*
+
+class PlayerData(
+    @SerializedName("block_players")
+    val blockPlayers: MutableSet<UUID> = Collections.synchronizedSet(HashSet()),
+    @SerializedName("last_death_pos")
+    val lastDeathPos: DeathPos = DeathPos(),
+    @SerializedName("toggle")
+    var toggle: Boolean = false
+)