init the awkward code

static/js/libarchive.js/src/compressed-file.js

@@ -0,0 +1,35 @@
+
+/**
+ * Represents compressed file before extraction
+ */
+export class CompressedFile{
+
+    constructor(name,size,path,archiveRef){
+        this._name = name;
+        this._size = size;
+        this._path = path;
+        this._archiveRef = archiveRef;
+    }
+
+    /**
+     * file name
+     */
+    get name(){
+        return this._name;
+    }
+    /**
+     * file size
+     */
+    get size(){
+        return this._size;
+    }
+
+    /**
+     * Extract file from archive
+     * @returns {Promise<File>} extracted file
+     */
+    extract(){
+        return this._archiveRef.extractSingleFile(this._path);
+    }
+
+}