Paper/patches/server/0115-Configurable-Cartographer-Treasure-Maps.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Tue, 20 Dec 2016 15:26:27 -0500
Subject: [PATCH] Configurable Cartographer Treasure Maps

Allow configuring for cartographers to return the same map location

Also allow turning off treasure maps all together as they can eat up Map ID's
which are limited in quantity.

diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index 0b5e223594ff95b8ba7c300d4a66ca7a17e53802..8451982ba4fc9522f2d77f68fc63a0e12558955f 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -56,6 +56,11 @@ public class PaperWorldConfig {
             set("despawn-ranges.hard", null);
         }
 
+        if (this.config.isSet("world-settings.default.treasure-maps-return-already-discovered") || this.config.isSet("world-settings." + worldName + ".treasure-maps-return-already-discovered")) {
+            set("treasure-maps-return-already-discovered", null);
+            needsSave = true;
+        }
+
         if (needsSave) {
             saveConfig();
         }
@@ -365,4 +370,25 @@ public class PaperWorldConfig {
             Bukkit.getLogger().warning("Spawn Egg and Armor Stand NBT filtering disabled, this is a potential security risk");
         }
     }
+
+    public boolean enableTreasureMaps = true;
+    public boolean treasureMapsAlreadyDiscoveredVillager = false;
+    public Boolean treasureMapsAlreadyDiscoveredLootTable = null;
+    private Boolean getBooleanOrNull(String path, Boolean defaultValue) {
+        this.config.addDefault("world-settings.default." + path, defaultValue == null ? "default" : defaultValue);
+        final Object value = this.config.get("world-settings." + worldName + "." + path, this.config.get("world-settings.default." + path));
+        if (value instanceof Boolean bool) {
+            return bool;
+        }
+        return null;
+    }
+    private void treasureMapsAlreadyDiscovered() {
+        enableTreasureMaps = getBoolean("enable-treasure-maps", true);
+        if (getBoolean("treasure-maps-return-already-discovered", false, false)) {
+            treasureMapsAlreadyDiscoveredLootTable = true;
+            treasureMapsAlreadyDiscoveredVillager = true;
+        }
+        treasureMapsAlreadyDiscoveredVillager = getBoolean("treasure-maps-find-already-discovered.villager-trade", treasureMapsAlreadyDiscoveredVillager);
+        treasureMapsAlreadyDiscoveredLootTable = getBooleanOrNull("treasure-maps-find-already-discovered.loot-tables", treasureMapsAlreadyDiscoveredLootTable);
+    }
 }
diff --git a/src/main/java/net/minecraft/world/entity/npc/VillagerTrades.java b/src/main/java/net/minecraft/world/entity/npc/VillagerTrades.java
index 7eda0af21ce7662e9bb6d47c79e175a060a8bb13..d595c82f850bb04657a86748d7e04695f934846f 100644
--- a/src/main/java/net/minecraft/world/entity/npc/VillagerTrades.java
+++ b/src/main/java/net/minecraft/world/entity/npc/VillagerTrades.java
@@ -386,7 +386,8 @@ public class VillagerTrades {
                 return null;
             } else {
                 ServerLevel serverLevel = (ServerLevel)entity.level;
-                BlockPos blockPos = serverLevel.findNearestMapFeature(this.destination, entity.blockPosition(), 100, true);
+                if (!serverLevel.paperConfig.enableTreasureMaps) return null; // Paper
+                BlockPos blockPos = serverLevel.findNearestMapFeature(this.destination, entity.blockPosition(), 100, !serverLevel.paperConfig.treasureMapsAlreadyDiscoveredVillager); // Paper
                 if (blockPos != null) {
                     ItemStack itemStack = MapItem.create(serverLevel, blockPos.getX(), blockPos.getZ(), (byte)2, true, true);
                     MapItem.renderBiomePreviewMap(serverLevel, itemStack);
diff --git a/src/main/java/net/minecraft/world/level/storage/loot/functions/ExplorationMapFunction.java b/src/main/java/net/minecraft/world/level/storage/loot/functions/ExplorationMapFunction.java
index 385cae45ef8cbaf9f09472585e6f639eea3e0331..a84cef6a10e3d7fdcd02ef6774163785dc3c350c 100644
--- a/src/main/java/net/minecraft/world/level/storage/loot/functions/ExplorationMapFunction.java
+++ b/src/main/java/net/minecraft/world/level/storage/loot/functions/ExplorationMapFunction.java
@@ -68,7 +68,16 @@ public class ExplorationMapFunction extends LootItemConditionalFunction {
             Vec3 vec3 = context.getParamOrNull(LootContextParams.ORIGIN);
             if (vec3 != null) {
                 ServerLevel serverLevel = context.getLevel();
-                BlockPos blockPos = serverLevel.findNearestMapFeature(this.destination, new BlockPos(vec3), this.searchRadius, this.skipKnownStructures);
+                // Paper start
+                if (!serverLevel.paperConfig.enableTreasureMaps) {
+                    /*
+                     * NOTE: I fear users will just get a plain map as their "treasure"
+                     * This is preferable to disrespecting the config.
+                     */
+                    return stack;
+                }
+                // Paper end
+                BlockPos blockPos = serverLevel.findNearestMapFeature(this.destination, new BlockPos(vec3), this.searchRadius, serverLevel.paperConfig.treasureMapsAlreadyDiscoveredLootTable == null ? this.skipKnownStructures : serverLevel.paperConfig.treasureMapsAlreadyDiscoveredLootTable); // Paper
                 if (blockPos != null) {
                     ItemStack itemStack = MapItem.create(serverLevel, blockPos.getX(), blockPos.getZ(), this.zoom, true, true);
                     MapItem.renderBiomePreviewMap(serverLevel, itemStack);