Added a button to download your skin

src/hdskins/java/com/voxelmodpack/hdskins/PreviewTexture.java

@@ -12,16 +12,23 @@ public class PreviewTexture extends ThreadDownloadImageData {
 
     private String model;
 
+    private String fileUrl;
+
     public PreviewTexture(@Nullable String model, String url, ResourceLocation fallbackTexture, @Nullable IImageBuffer imageBuffer) {
         super(null, url, fallbackTexture, imageBuffer);
 
         this.model = model == null ? "default" : model;
+        this.fileUrl = url;
     }
 
     public boolean isTextureUploaded() {
         return uploaded && this.getGlTextureId() > -1;
     }
 
+    public String getUrl() {
+        return fileUrl;
+    }
+
     @Override
     public void deleteGlTexture() {
         super.deleteGlTexture();

src/hdskins/java/com/voxelmodpack/hdskins/gui/GuiSkins.java

@@ -14,9 +14,12 @@ import com.mojang.authlib.minecraft.MinecraftProfileTexture.Type;
 import com.mumfrey.liteloader.util.log.LiteLoaderLogger;
 import com.voxelmodpack.hdskins.HDSkinManager;
 import com.voxelmodpack.hdskins.PreviewTextureManager;
+import com.voxelmodpack.hdskins.skins.NetClient;
 import com.voxelmodpack.hdskins.skins.SkinServer;
 import com.voxelmodpack.hdskins.skins.SkinUpload;
 import com.voxelmodpack.hdskins.skins.SkinUploadResponse;
+import com.voxelmodpack.hdskins.upload.awt.ThreadOpenFile;
+import com.voxelmodpack.hdskins.upload.awt.ThreadOpenFileFolder;
 import com.voxelmodpack.hdskins.upload.awt.ThreadOpenFilePNG;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.audio.PositionedSoundRecord;
@@ -32,6 +35,8 @@ import net.minecraft.item.ItemStack;
 import net.minecraft.util.EnumHand;
 import net.minecraft.util.ResourceLocation;
 import net.minecraft.util.math.MathHelper;
+
+import org.apache.commons.io.FileUtils;
 import org.apache.commons.io.FilenameUtils;
 import org.apache.logging.log4j.LogManager;
 import org.lwjgl.BufferUtils;
@@ -65,6 +70,7 @@ public class GuiSkins extends GameGui {
     private SkinServer gateway;
 
     private Button btnUpload;
+    private Button btnDownload;
     private Button btnClear;
 
     private Button btnModeSteve;
@@ -93,7 +99,7 @@ public class GuiSkins extends GameGui {
 
     private int refreshCounter = 0;
 
-    private ThreadOpenFilePNG openFileThread;
+    private ThreadOpenFile openFileThread;
 
     private final Object skinLock = new Object();
 
@@ -180,6 +186,7 @@ public class GuiSkins extends GameGui {
                 selectedSkin = pendingSkinFile;
                 pendingSkinFile = null;
                 btnUpload.enabled = true;
+                btnDownload.enabled = true;
                 onSetLocalSkin(textureType);
             }
         }
@@ -244,10 +251,14 @@ public class GuiSkins extends GameGui {
             sender.enabled = false;
         })).setEnabled(!mc.isFullScreen());
 
-        addButton(btnUpload = new Button(width / 2 - 24, height / 2 - 10, 48, 20, "hdskins.options.chevy", sender -> {
+        addButton(btnUpload = new Button(width / 2 - 24, height / 2 - 20, 48, 20, "hdskins.options.chevy", sender -> {
             punchServer("hdskins.upload", selectedSkin.toURI());
         })).setEnabled(canUpload()).setTooltip("hdskins.options.chevy.title");
 
+        addButton(btnDownload = new Button(width / 2 - 24, height / 2 + 20, 48, 20, "hdskins.options.download", sender -> {
+            launchSkinDownload(sender);
+        })).setEnabled(canDownload()).setTooltip("hdskins.options.download.title");
+
         addButton(btnClear = new Button(width / 2 + 60, height - 27, 90, 20, "hdskins.options.clear", sender -> {
             if (remotePlayer.isTextureSetupComplete()) {
                 punchServer("hdskins.request", null);
@@ -570,12 +581,37 @@ public class GuiSkins extends GameGui {
         uploadingSkin = true;
         uploadMessage = format(uploadMsg);
         btnUpload.enabled = canUpload();
+        btnDownload.enabled = canDownload();
 
         gateway.uploadSkin(mc.getSession(), new SkinUpload(textureType, path, getMetadata()))
                 .thenAccept(this::onUploadComplete)
                 .exceptionally(this::onUploadFailure);
     }
 
+    private void launchSkinDownload(Button sender) {
+        sender.enabled = false;
+        String loc = remotePlayer.getLocal(textureType).getRemote().getUrl();
+
+        new NetClient("GET", loc).async(HDSkinManager.skinDownloadExecutor).thenAccept(response -> {
+            openFileThread = new ThreadOpenFileFolder(mc, format("hdskins.open.title"), (fileDialog, dialogResult) -> {
+                openFileThread = null;
+                sender.enabled = true;
+                if (dialogResult == 0) {
+                    File out = fileDialog.getSelectedFile();
+
+                    try {
+                        out.createNewFile();
+
+                        FileUtils.copyInputStreamToFile(response.getInputStream(), out);
+                    } catch (IOException e) {
+                        e.printStackTrace();
+                    }
+                }
+            });
+            openFileThread.start();
+        });
+    }
+
     private Map<String, String> getMetadata() {
         return ImmutableMap.of("model", thinArmType ? "slim" : "default");
     }
@@ -587,6 +623,7 @@ public class GuiSkins extends GameGui {
         showMessage = true;
         uploadingSkin = false;
         btnUpload.enabled = canUpload();
+        btnDownload.enabled = canDownload();
 
         return null;
     }
@@ -596,12 +633,17 @@ public class GuiSkins extends GameGui {
         pendingRemoteSkinRefresh = true;
         uploadingSkin = false;
         btnUpload.enabled = canUpload();
+        btnDownload.enabled = canDownload();
     }
 
     protected boolean canUpload() {
         return selectedSkin != null && !uploadingSkin && !pendingRemoteSkinRefresh;
     }
 
+    protected boolean canDownload() {
+        return remotePlayer.getLocal(textureType).hasRemote();
+    }
+
     CompletableFuture<PreviewTextureManager> loadTextures(GameProfile profile) {
         return gateway.getPreviewTextures(profile).thenApply(PreviewTextureManager::new);
     }

src/hdskins/java/com/voxelmodpack/hdskins/skins/NetClient.java

@@ -11,6 +11,8 @@ import java.io.File;
 import java.io.IOException;
 import java.net.URI;
 import java.util.Map;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.Executor;
 
 /**
  * Ew. Why so many builders? >.<
@@ -43,10 +45,16 @@ public class NetClient {
     public MoreHttpResponses send() throws IOException {
         HttpUriRequest request = rqBuilder.build();
 
+        if (headers != null) {
             for (Map.Entry<String, ?> parameter : headers.entrySet()) {
                 request.addHeader(parameter.getKey(), parameter.getValue().toString());
             }
+        }
 
         return MoreHttpResponses.execute(HDSkinManager.httpClient, request);
     }
+
+    public CompletableFuture<MoreHttpResponses> async(Executor exec) {
+        return CallableFutures.asyncFailableFuture(this::send, exec);
+    }
 }

src/hdskins/java/com/voxelmodpack/hdskins/upload/awt/ThreadOpenFileFolder.java

@@ -0,0 +1,32 @@
+package com.voxelmodpack.hdskins.upload.awt;
+
+import net.minecraft.client.Minecraft;
+
+import javax.swing.filechooser.FileFilter;
+import java.io.File;
+
+/**
+ * Opens an awt "Open File" dialog that only accepts directories.
+ */
+public class ThreadOpenFileFolder extends ThreadOpenFile {
+
+    public ThreadOpenFileFolder(Minecraft minecraft, String dialogTitle, IOpenFileCallback callback)
+            throws IllegalStateException {
+        super(minecraft, dialogTitle, callback);
+    }
+
+    @Override
+    protected FileFilter getFileFilter() {
+        return new FileFilter() {
+            @Override
+            public String getDescription() {
+                return "Directories";
+            }
+
+            @Override
+            public boolean accept(File f) {
+                return f.isDirectory();
+            }
+        };
+    }
+}

src/hdskins/resources/assets/hdskins/lang/en_us.lang

@@ -24,6 +24,9 @@ hdskins.mode.skin=%s
 
 hdskins.options.chevy=>>
 hdskins.options.chevy.title=Upload Skin
+hdskins.options.download=<<
+hdskins.options.download.title=Save Skin
+
 hdskins.options.close=Close
 hdskins.options.clear=Clear
 hdskins.options.browse=Browse