Add image pool

src/main/java/dev/mikchan/mcnp/motd/Creators.kt

@@ -4,8 +4,11 @@ import dev.mikchan.mcnp.motd.commands.creator.ICommandManagerCreator
 import dev.mikchan.mcnp.motd.commands.creator.acf.ACFCommandManagerCreator
 import dev.mikchan.mcnp.motd.config.creator.IConfigCreator
 import dev.mikchan.mcnp.motd.config.creator.boostedYaml.BoostedYamlConfigCreator
+import dev.mikchan.mcnp.motd.imagePool.creator.IImagePoolCreator
+import dev.mikchan.mcnp.motd.imagePool.creator.ImagePoolCreator
 
 object Creators {
     var config: IConfigCreator = BoostedYamlConfigCreator()
     var commandManager: ICommandManagerCreator = ACFCommandManagerCreator()
+    var imagePool: IImagePoolCreator = ImagePoolCreator()
 }

src/main/java/dev/mikchan/mcnp/motd/MOTDPlugin.kt

@@ -2,6 +2,7 @@ package dev.mikchan.mcnp.motd
 
 import dev.mikchan.mcnp.motd.commands.manager.ICommandManager
 import dev.mikchan.mcnp.motd.config.config.IConfig
+import dev.mikchan.mcnp.motd.imagePool.pool.IImagePool
 import org.bstats.bukkit.Metrics
 import org.bukkit.plugin.java.JavaPlugin
 
@@ -12,10 +13,13 @@ class MOTDPlugin : JavaPlugin() {
     }
 
     val config: IConfig by lazy { Creators.config.build(this) }
+    val imagePool: IImagePool by lazy { Creators.imagePool.build(this) }
+
     private val commandManager: ICommandManager by lazy { Creators.commandManager.build(this) }
 
     override fun onEnable() {
         commandManager.registerAll()
+        imagePool.preload()
 
         Metrics(this, BSTATS_ID)
     }

src/main/java/dev/mikchan/mcnp/motd/commands/manager/acf/commands/AdminCommand.kt

@@ -48,6 +48,7 @@ internal class AdminCommand(private val plugin: MOTDPlugin) : BaseCommand() {
     @Description("Reloads config")
     fun onReload(sender: CommandSender) {
         if (plugin.config.reload()) {
+            plugin.imagePool.reload()
             sender.sendMessage("${ChatColor.GREEN}Config is successfully reloaded!")
         } else {
             sender.sendMessage("${ChatColor.RED}Unable to reload config!")

src/main/java/dev/mikchan/mcnp/motd/imagePool/creator/IImagePoolCreator.kt

@@ -0,0 +1,8 @@
+package dev.mikchan.mcnp.motd.imagePool.creator
+
+import dev.mikchan.mcnp.motd.MOTDPlugin
+import dev.mikchan.mcnp.motd.imagePool.pool.IImagePool
+
+interface IImagePoolCreator {
+    fun build(plugin: MOTDPlugin): IImagePool
+}

src/main/java/dev/mikchan/mcnp/motd/imagePool/creator/ImagePoolCreator.kt

@@ -0,0 +1,11 @@
+package dev.mikchan.mcnp.motd.imagePool.creator
+
+import dev.mikchan.mcnp.motd.MOTDPlugin
+import dev.mikchan.mcnp.motd.imagePool.pool.IImagePool
+import dev.mikchan.mcnp.motd.imagePool.pool.ImagePool
+
+internal class ImagePoolCreator : IImagePoolCreator {
+    override fun build(plugin: MOTDPlugin): IImagePool {
+        return ImagePool(plugin)
+    }
+}

src/main/java/dev/mikchan/mcnp/motd/imagePool/pool/IImagePool.kt

@@ -0,0 +1,11 @@
+package dev.mikchan.mcnp.motd.imagePool.pool
+
+import org.bukkit.util.CachedServerIcon
+
+interface IImagePool {
+    fun get(name: String): CachedServerIcon?
+    fun getRandom(): CachedServerIcon?
+
+    fun preload()
+    fun reload()
+}

src/main/java/dev/mikchan/mcnp/motd/imagePool/pool/ImagePool.kt

@@ -0,0 +1,46 @@
+package dev.mikchan.mcnp.motd.imagePool.pool
+
+import dev.mikchan.mcnp.motd.MOTDPlugin
+import org.bukkit.util.CachedServerIcon
+import java.io.File
+import kotlin.io.path.useDirectoryEntries
+
+internal class ImagePool(private val plugin: MOTDPlugin) : IImagePool {
+    private val iconFolder
+        get() = run {
+            val res = File(plugin.dataFolder, "images")
+            if (!res.exists()) {
+                res.mkdir()
+            }
+            res.toPath()
+        }
+
+    private var cache = mapOf<String, CachedServerIcon>()
+
+    override fun get(name: String): CachedServerIcon? {
+        return cache["${name}.png"]
+    }
+
+    override fun getRandom(): CachedServerIcon? {
+        val cache = this.cache
+        if (cache.isEmpty()) return null
+        return cache.values.random()
+    }
+
+    override fun preload() {
+        cache = iconFolder.useDirectoryEntries("*.png") { entries ->
+            entries.map { path ->
+                path.fileName.toString() to try {
+                    plugin.server.loadServerIcon(path.toFile())
+                } catch (_: Exception) {
+                    null
+                }
+            }.toMap().filter { it.value != null }.mapValues { it as CachedServerIcon }
+        }
+    }
+
+
+    override fun reload() {
+        preload()
+    }
+}