fix(core): update

ts/smartnpm.classes.npmpackage.ts

@@ -48,9 +48,9 @@ export class NpmPackage {
   } = null;
   public searchScore: number = null;
 
-  public npmRegistry: NpmRegistry;
+  public npmRegistryRef: NpmRegistry;
   constructor(npmRegistryArg: NpmRegistry) {
-    this.npmRegistry = npmRegistryArg;
+    this.npmRegistryRef = npmRegistryArg;
   }
 
   /**
@@ -58,6 +58,38 @@ export class NpmPackage {
    */
   public async saveToDisk(targetDir: string) {
     const smartarchiveInstance = new plugins.smartarchive.SmartArchive();
-    await smartarchiveInstance.extractArchiveFromUrl(this.dist.tarball, targetDir);
+    await smartarchiveInstance.extractArchiveFromUrlToFs(this.dist.tarball, targetDir);
+  }
+
+  /**
+   * saves the package to memory
+   */
+  public async saveToMemory() {}
+
+  /**
+   * get file from package
+   */
+  public async getFileFromPackage(filePath: string): Promise<plugins.smartfile.Smartfile> {
+    const done = plugins.smartpromise.defer<plugins.smartfile.Smartfile>();
+    const smartarchiveInstance = new plugins.smartarchive.SmartArchive();
+    const fileObservable = await smartarchiveInstance.extractArchiveFromUrlToObservable(
+      this.dist.tarball
+    );
+    const wantedFilePath = plugins.path.join('package', filePath);
+    const subscription = fileObservable.subscribe(
+      (fileArg) => {
+        if (fileArg.path === wantedFilePath) {
+          done.resolve(fileArg);
+          subscription.unsubscribe();
+        }
+      },
+      (err) => {
+        console.log(err);
+      },
+      () => {
+        subscription.unsubscribe();
+      }
+    );
+    return done.promise;
   }
 }