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 f95999daa1955dd4d919d0e668fe099901a0481c..7360a0a70ddb3dc055d3ebc62071cb5327094e8e 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.findNearestMapStructure(this.destination, entity.blockPosition(), 100, true);
+                if (!serverLevel.paperConfig.enableTreasureMaps) return null; // Paper
+                BlockPos blockPos = serverLevel.findNearestMapStructure(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 321384730cacbdc22eedc53651e4d24f06c73b99..fa1387ce6029198109bed258c559cd008f531c08 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.findNearestMapStructure(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.findNearestMapStructure(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);