Feature: Notify when a player join/leave your lobby

src/main/java/at/hannibal2/skyhanni/config/features/markedplayer/MarkedPlayerConfig.java

@@ -2,8 +2,10 @@
 
 import at.hannibal2.skyhanni.utils.LorenzColor;
 import com.google.gson.annotations.Expose;
+import io.github.notenoughupdates.moulconfig.annotations.Accordion;
 import io.github.notenoughupdates.moulconfig.annotations.ConfigEditorBoolean;
 import io.github.notenoughupdates.moulconfig.annotations.ConfigEditorDropdown;
+import io.github.notenoughupdates.moulconfig.annotations.ConfigEditorText;
 import io.github.notenoughupdates.moulconfig.annotations.ConfigOption;
 import io.github.notenoughupdates.moulconfig.observer.Property;
 
@@ -34,4 +36,36 @@ public class MarkedPlayerConfig {
     @ConfigEditorDropdown
     public Property<LorenzColor> entityColor = Property.of(LorenzColor.YELLOW);
 
+    @Expose
+    @ConfigOption(name = "Join/Leave Message", desc = "")
+    @Accordion
+    public JoinLeaveMessage joinLeaveMessage = new JoinLeaveMessage();
+
+    public static class JoinLeaveMessage {
+        @Expose
+        @ConfigOption(name = "Enabled", desc = "Enable the Join/Leave message for marked players.")
+        @ConfigEditorBoolean
+        public boolean enabled = false;
+
+        @Expose
+        @ConfigOption(name = "Players List", desc = "The list of players you want to be notified for.\n§cCase sensitive, separated by commas.")
+        @ConfigEditorText
+        public Property<String> playersList = Property.of("hypixel,Minikloon");
+
+        @Expose
+        @ConfigOption(name = "Use Prefix", desc = "Should the [SkyHanni] prefix should be in the join/leave message ?")
+        @ConfigEditorBoolean
+        public boolean usePrefix = true;
+
+        @Expose
+        @ConfigOption(name = "Join Message", desc = "Configure the message when someone joins.\n&& is replaced with the minecraft color code §.\n%s is replaced with the player name.")
+        @ConfigEditorText
+        public String joinMessage = "&&b%s &&ajoined your lobby.";
+
+        @Expose
+        @ConfigOption(name = "Left Message", desc = "Configure the message when someone leaves.\n&& is replaced with the minecraft color code §.\n%s is replaced with the player name.")
+        @ConfigEditorText
+        public String leftMessage = "&&b%s &&cleft your lobby.";
+    }
+
 }

src/main/java/at/hannibal2/skyhanni/features/misc/MarkedPlayerManager.kt

@@ -3,16 +3,20 @@ package at.hannibal2.skyhanni.features.misc
 import at.hannibal2.skyhanni.SkyHanniMod
 import at.hannibal2.skyhanni.config.ConfigUpdaterMigrator
 import at.hannibal2.skyhanni.config.enums.OutsideSbFeature
+import at.hannibal2.skyhanni.data.model.TabWidget
 import at.hannibal2.skyhanni.events.ConfigLoadEvent
 import at.hannibal2.skyhanni.events.LorenzWorldChangeEvent
 import at.hannibal2.skyhanni.events.SecondPassedEvent
+import at.hannibal2.skyhanni.events.WidgetUpdateEvent
 import at.hannibal2.skyhanni.mixins.hooks.RenderLivingEntityHelper
 import at.hannibal2.skyhanni.skyhannimodule.SkyHanniModule
 import at.hannibal2.skyhanni.utils.ChatUtils
 import at.hannibal2.skyhanni.utils.ColorUtils.withAlpha
 import at.hannibal2.skyhanni.utils.ConditionalUtils.onToggle
 import at.hannibal2.skyhanni.utils.EntityUtils
 import at.hannibal2.skyhanni.utils.LorenzUtils
+import at.hannibal2.skyhanni.utils.RegexUtils.matchMatcher
+import at.hannibal2.skyhanni.utils.repopatterns.RepoPattern
 import net.minecraft.client.Minecraft
 import net.minecraft.client.entity.EntityOtherPlayerMP
 import net.minecraftforge.fml.common.eventhandler.SubscribeEvent
@@ -25,6 +29,24 @@ object MarkedPlayerManager {
     private val playerNamesToMark = mutableListOf<String>()
     private val markedPlayers = mutableMapOf<String, EntityOtherPlayerMP>()
 
+    private val patternGroup = RepoPattern.group("misc.markedplayer")
+
+    /**
+     * REGEX-TEST: §8[§r§6400§r§8] §r§6HiZe_ §r§6▒
+     * REGEX-TEST: §8[§r§9318§r§8] §r§bwings_wacr §r§b§lᛝ
+     * REGEX-TEST: §8[§r§d321§r§8] §r§bbotbob21 §r§b§lᛝ
+     * REGEX-TEST: §8[§r§f42§r§8] §r§aVoidW_
+     * REGEX-TEST: §8[§r§a151§r§8] §r§bPhoenix_325
+     */
+    private val tabPlayerName by patternGroup.pattern(
+        "tabplayername",
+        "§8\\[§r(?<level>.*)§r§8] §r§\\w(?<name>[A-z0-9_]+)(?<symbol>.*)?",
+    )
+
+    private val notifyList = mutableSetOf<String>()
+    private val currentLobbyPlayers = mutableSetOf<String>()
+    private var personOfInterest = listOf<String>()
+
     fun command(args: Array<String>) {
         if (args.size != 1) {
             ChatUtils.userError("Usage: /shmarkplayer <name>")
@@ -72,7 +94,7 @@ object MarkedPlayerManager {
         RenderLivingEntityHelper.setEntityColorWithNoHurtTime(
             this,
             config.entityColor.get().toColor().withAlpha(127),
-            ::isEnabled
+            ::isEnabled,
         )
     }
 
@@ -105,6 +127,10 @@ object MarkedPlayerManager {
             }
         }
         config.entityColor.onToggle(::refreshColors)
+        config.joinLeaveMessage.playersList.onToggle {
+            personOfInterest = config.joinLeaveMessage.playersList.get().split(",").map { it.trim() }
+        }
+
     }
 
     @SubscribeEvent
@@ -119,6 +145,8 @@ object MarkedPlayerManager {
         if (Minecraft.getMinecraft().thePlayer == null) return
 
         markedPlayers.clear()
+        notifyList.clear()
+        currentLobbyPlayers.clear()
         if (config.markOwnName.get()) {
             val name = LorenzUtils.getPlayerName()
             if (!playerNamesToMark.contains(name)) {
@@ -127,6 +155,42 @@ object MarkedPlayerManager {
         }
     }
 
+    @SubscribeEvent
+    fun onTablistUpdate(event: WidgetUpdateEvent) {
+        if (!isEnabled()) return
+        if (!config.joinLeaveMessage.enabled) return
+        if (!event.isWidget(TabWidget.PLAYER_LIST)) return
+
+        currentLobbyPlayers.clear()
+
+        loop@ for (line in event.lines) {
+            tabPlayerName.matchMatcher(line) {
+                val name = group("name")
+                if (name == LorenzUtils.getPlayerName()) continue@loop
+                currentLobbyPlayers.add(name)
+            }
+        }
+
+        val playerJoined = currentLobbyPlayers.filter { it in personOfInterest && it !in notifyList }
+        val playerLeft = personOfInterest.filter { it in notifyList && it !in currentLobbyPlayers }
+
+        if (playerJoined.isNotEmpty()) {
+            ChatUtils.chat(
+                String.format(config.joinLeaveMessage.joinMessage.replace("&&", "§"), playerJoined.joinToString(", ")),
+                config.joinLeaveMessage.usePrefix,
+            )
+            notifyList.addAll(playerJoined)
+        }
+
+        if (playerLeft.isNotEmpty()) {
+            ChatUtils.chat(
+                String.format(config.joinLeaveMessage.leftMessage.replace("&&", "§"), playerLeft.joinToString(", ")),
+                config.joinLeaveMessage.usePrefix,
+            )
+            notifyList.removeAll(playerLeft)
+        }
+    }
+
     @SubscribeEvent
     fun onConfigFix(event: ConfigUpdaterMigrator.ConfigFixEvent) {
         event.move(31, "markedPlayers", "gui.markedPlayers")