make the skin renderer less bad (thanks bray)

src/main/java/cc/fascinated/model/skin/Skin.java

@@ -0,0 +1,128 @@
+package cc.fascinated.model.skin;
+
+import cc.fascinated.common.PlayerUtils;
+import cc.fascinated.config.Config;
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.google.gson.JsonObject;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.extern.log4j.Log4j2;
+
+import javax.imageio.ImageIO;
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayInputStream;
+import java.util.HashMap;
+import java.util.Map;
+
+@AllArgsConstructor @NoArgsConstructor
+@Getter @Log4j2
+public class Skin {
+    /**
+     * The default skin, usually used when the skin is not found.
+     */
+    public static final Skin DEFAULT_SKIN = new Skin("http://textures.minecraft.net/texture/60a5bd016b3c9a1b9272e4929e30827a67be4ebb219017adbbc4a4d22ebd5b1",
+            Model.DEFAULT);
+
+    /**
+     * The URL for the skin
+     */
+    private String url;
+
+    /**
+     * The model for the skin
+     */
+    private Model model;
+
+    /**
+     * The legacy status of the skin
+     */
+    private boolean isLegacy = false;
+
+    /**
+     * The skin image for the skin
+     */
+    @JsonIgnore
+    private byte[] skinImage;
+
+    /**
+     * The part URLs of the skin
+     */
+    @JsonProperty("parts")
+    private Map<String, String> partUrls = new HashMap<>();
+
+    public Skin(String url, Model model) {
+        this.url = url;
+        this.model = model;
+
+        this.skinImage = PlayerUtils.getSkinImage(url);
+        if (this.skinImage != null) {
+            try {
+                BufferedImage image = ImageIO.read(new ByteArrayInputStream(this.skinImage));
+                if (image.getWidth() == 64 && image.getHeight() == 32) { // Using the old skin format
+                    this.isLegacy = true;
+                }
+            } catch (Exception ignored) {}
+        }
+    }
+
+    /**
+     * Gets the skin from a {@link JsonObject}.
+     *
+     * @param json the JSON object
+     * @return the skin
+     */
+    public static Skin fromJson(JsonObject json) {
+        if (json == null) {
+            return null;
+        }
+        String url = json.get("url").getAsString();
+        JsonObject metadata = json.getAsJsonObject("metadata");
+        Model model = Model.fromName(metadata == null ? "default" : // Fall back to slim if the model is not found
+                metadata.get("model").getAsString());
+        return new Skin(url, model);
+    }
+
+    /**
+     * Populates the part URLs for the skin.
+     *
+     * @param playerUuid the player's UUID
+     */
+    public Skin populatePartUrls(String playerUuid) {
+        for (Enum<?>[] type : ISkinPart.TYPES) {
+            for (Enum<?> part : type) {
+                ISkinPart skinPart = (ISkinPart) part;
+                if (skinPart.hidden()) {
+                    continue;
+                }
+                String partName = part.name().toLowerCase();
+                this.partUrls.put(partName, Config.INSTANCE.getWebPublicUrl() + "/player/" + partName + "/" + playerUuid);
+            }
+        }
+        return this;
+    }
+
+    /**
+     * The model of the skin.
+     */
+    public enum Model {
+        DEFAULT,
+        SLIM;
+
+        /**
+         * Gets the model from its name.
+         *
+         * @param name the name of the model
+         * @return the model
+         */
+        public static Model fromName(String name) {
+            for (Model model : values()) {
+                if (model.name().equalsIgnoreCase(name)) {
+                    return model;
+                }
+            }
+            return null;
+        }
+    }
+}