noe reading correctly

ts/smartgulp.classes.gulpstream.ts

@@ -0,0 +1,30 @@
+// this file contains the code to generate and handle the stream
+
+import * as plugins from './smartgulp.plugins'
+import { Smartfile } from 'smartfile'
+
+import { Transform } from 'stream'
+
+export class GulpStream {
+  stream = new Transform({ objectMode: true })
+
+  /**
+   * allows you to pipe a SmartfileArray into the stream
+   */
+  async pipeSmartfileArray(smartfileArray: Smartfile[]) {
+    // ensure what we get is an array
+    if (!Array.isArray(smartfileArray)) {
+      throw new Error('fileArg has unknown format')
+    }
+    for (let smartfile of smartfileArray) {
+      let hasWritten = this.stream.push(smartfile)
+      if (!hasWritten) {
+        await plugins.smartevent.once(this.stream, 'drain')
+      } else {
+        // iterate
+      }
+    };
+    // signal end of stream;
+    this.stream.push(null)
+  }
+}