Simplify stat collection by using more vanilla systems

Instead of injecting in various places to collect statistics
the mod now basically maps vanilla statistics to modded ones

This leaves one hook into the vanilla `incrementStat` method
and two for counting entities players kill or are killed by.

Author: LostLuma

src/main/resources/assets/server_stats/data/id_to_identifier.json renamed to src/main/resources/assets/server_stats/data/id_map.json

@@ -0,0 +1,6 @@
+package net.lostluma.server_stats;
+
+public class Constants {
+    public static final String MOD_ID = "server_stats";
+    public static final String STATS_PACKET_CHANNEL = MOD_ID + "|s";
+}

src/main/resources/assets/server_stats/data/stat_id_prefixes.json

@@ -1,19 +1,28 @@
 package net.lostluma.server_stats.mixin.server;
 
+import net.lostluma.server_stats.stats.Stats;
 import net.lostluma.server_stats.types.StatsPlayer;
+import net.minecraft.entity.living.LivingEntity;
 import org.jetbrains.annotations.Nullable;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Unique;
 
 import net.lostluma.server_stats.stats.ServerPlayerStats;
 import net.lostluma.server_stats.stats.Stat;
 import net.minecraft.entity.living.player.PlayerEntity;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 
 @Mixin(PlayerEntity.class)
 public class PlayerEntityMixin implements StatsPlayer {
     @Unique
     private ServerPlayerStats server_stats$serverPlayerStats = null;
 
+    private PlayerEntity getPlayer() {
+        return (PlayerEntity) (Object) this;
+    }
+
     @Override
     public void server_stats$incrementStat(Stat stat, int amount) {
         var stats = this.server_stats$getStats();
@@ -43,4 +52,9 @@ public class PlayerEntityMixin implements StatsPlayer {
 
         return this.server_stats$serverPlayerStats;
     }
+
+    @Inject(method = "onKill", at = @At("HEAD"))
+    private void onKill(LivingEntity entity, CallbackInfo callbackInfo) {
+        this.getPlayer().server_stats$incrementStat(Stats.getEntityKillStat(entity), 1);
+    }
 }

src/main/resources/assets/server_stats/data/stat_ids.json

@@ -0,0 +1,39 @@
+package net.lostluma.server_stats.mixin.server;
+
+import net.minecraft.entity.living.player.PlayerEntity;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import net.lostluma.server_stats.stats.Stats;
+import net.minecraft.entity.damage.DamageSource;
+import net.minecraft.server.entity.living.player.ServerPlayerEntity;
+
+@Mixin({PlayerEntity.class, ServerPlayerEntity.class })
+public class ServerPlayerEntityMixin {
+    private PlayerEntity getPlayer() {
+        return (PlayerEntity) (Object) this;
+    }
+
+    @Inject(method = "incrementStat(Lnet/minecraft/stat/Stat;I)V", at = @At("HEAD"))
+    private void incrementStat(net.minecraft.stat.Stat vanillaStat, int amount, CallbackInfo callbackInfo) {
+        if (vanillaStat == null) {
+            return;
+        }
+
+        var stat = Stats.byVanillaId(vanillaStat.id);
+
+        if (stat != null) {
+            this.getPlayer().server_stats$incrementStat(stat, amount);
+        }
+    }
+
+    @Inject(method = "onKilled", at = @At("HEAD"))
+    private void onKilled(DamageSource source, CallbackInfo callbackInfo) {
+        if (source.getAttacker() != null) {
+            var attacker = source.getAttacker();
+            this.getPlayer().server_stats$incrementStat(Stats.getKilledByEntityStat(attacker), 1);
+        }
+    }
+}