add custom texture cache

CHANGELOG.md

@@ -4,6 +4,7 @@ craftedcore 5.3
 - add new lang keys for changing config entries
 - fix duplicate log entries with no internet connection
 - add methods to check caching status (for player profiles)
+- add custom texture cache
 
 craftedcore 5.2
 ================

common/src/main/java/tocraft/craftedcore/gui/TextureCache.java

@@ -0,0 +1,50 @@
+package tocraft.craftedcore.gui;
+
+import com.mojang.blaze3d.platform.NativeImage;
+import net.fabricmc.api.EnvType;
+import net.fabricmc.api.Environment;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.renderer.texture.DynamicTexture;
+import net.minecraft.resources.ResourceLocation;
+import org.jetbrains.annotations.Nullable;
+import tocraft.craftedcore.CraftedCore;
+import tocraft.craftedcore.patched.Identifier;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+@SuppressWarnings("unused")
+@Environment(EnvType.CLIENT)
+public class TextureCache {
+    private static final Map<String, ResourceLocation> TEXTURE_CACHE = new ConcurrentHashMap<>();
+
+    /**
+     * Converts a URL to a readable id
+     *
+     * @param namespace the namespace in which the id should be saved
+     * @param type for the id: "textures/entity/skin_123.png", choose: "entity"
+     * @param prefix  for the id: "textures/entity/skin_123.png", choose: "skin". (some number will be auto-generated)
+     * @param fileType the file type, e.g. "png"
+     * @param textureURL the URL where the texture is found
+     * @return the id if the texture could be cached or null, if there was an exception
+     */
+    @Nullable
+    public static ResourceLocation getTextureId(String namespace, String type, String prefix, String fileType, URL textureURL) {
+        return TEXTURE_CACHE.computeIfAbsent(String.valueOf(textureURL), key -> {
+            ResourceLocation id = Identifier.parse(namespace, "textures/" + type + "/" + prefix + key.hashCode() + "." + fileType);
+            try(InputStream is = textureURL.openStream()) {
+                NativeImage image = NativeImage.read(new ByteArrayInputStream(is.readAllBytes()));
+                DynamicTexture dynamicTexture = new DynamicTexture(image);
+                Minecraft.getInstance().getTextureManager().register(id, dynamicTexture);
+            } catch (IOException e) {
+                CraftedCore.LOGGER.error("Caught an exception while reading url: {}", textureURL, e);
+                return null;
+            }
+            return id;
+        });
+    }
+}

common/src/main/java/tocraft/craftedcore/platform/PlayerProfile.java

@@ -1,9 +1,11 @@
 package tocraft.craftedcore.platform;
 
 import com.google.gson.*;
+import net.minecraft.resources.ResourceLocation;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import tocraft.craftedcore.CraftedCore;
+import tocraft.craftedcore.gui.TextureCache;
 import tocraft.craftedcore.util.NetUtils;
 
 import java.io.IOException;
@@ -135,4 +137,20 @@ private static UUID stringToUUID(final String input) throws IllegalArgumentExcep
             return UUID.fromString(input.replaceFirst("(\\w{8})(\\w{4})(\\w{4})(\\w{4})(\\w{12})", "$1-$2-$3-$4-$5"));
         }
     }
+
+    public ResourceLocation getSkinId() {
+        if (skin != null) {
+            return TextureCache.getTextureId(CraftedCore.MODID, "entity", "custom_skin_", "png", skin);
+        } else {
+            return null;
+        }
+    }
+
+    public ResourceLocation getCapeId() {
+        if (cape != null) {
+            return TextureCache.getTextureId(CraftedCore.MODID, "entity", "custom_cape_", "png", cape);
+        } else {
+            return null;
+        }
+    }
 }

gradle.properties

@@ -2,7 +2,7 @@ org.gradle.jvmargs=-Xmx4G
 # Base Versions
 minecraft=1.21
 archives_base_name=craftedcore
-mod_version=5.2
+mod_version=5.3
 artifact_type=release
 maven_group=dev.tocraft
 # Loader Versions