Removed idea to have Tasks have a seperate step class; needless abstraction at this point, added manifest parser

lib/cache.rb

@@ -6,6 +6,7 @@ class W3DHub
       "#{CACHE_PATH}/#{Digest::SHA2.hexdigest(uri)}.#{ext}"
     end
 
+    # Fetch a generic uri
     def self.fetch(uri)
       path = path(uri)
 
@@ -26,7 +27,43 @@ class W3DHub
       end
     end
 
-    def self.fetch_package(*args)
+    def self.create_directories(path)
+      target_directory = File.dirname(path)
+
+      FileUtils.mkdir_p(target_directory) unless Dir.exist?(target_directory)
+    end
+
+    def self.package_path(category, subcategory, name, version)
+      package_cache_dir = $window.settings[:package_cache_dir]
+
+      "#{package_cache_dir}/#{category}/#{subcategory}/#{version}/#{name}.package"
+    end
+
+    # Download a W3D Hub package
+    def self.fetch_package(socket, category, subcategory, name, version, block)
+      path = package_path(category, subcategory, name, version)
+
+      create_directories(path)
+
+      file = File.open(path, "wb")
+
+      streamer = lambda do |chunk, remaining_bytes, total_bytes|
+        file.write(chunk)
+
+        block.call(chunk, remaining_bytes, total_bytes)
+        # puts "Remaining: #{remaining_bytes.to_f / total_bytes}%"
+      end
+
+      response = socket.post(
+        path: "apis/launcher/1/get-package",
+        headers: Api::DEFAULT_HEADERS.merge({"Content-Type": "application/x-www-form-urlencoded"}),
+        body: "data=#{JSON.dump({ category: category, subcategory: subcategory, name: name, version: version })}",
+        response_block: streamer
+      )
+
+      file.close
+
+      response.status == 200
     end
   end
 end