[#94] Backend

https://project.mdnd-it.cc/work_packages/94

SerpentRace_Backend/node_modules/stream-chain/utils/comp.js

@@ -0,0 +1,20 @@
+'use strict';
+
+const {Transform} = require('stream');
+const {next} = require('./asFun');
+const {sanitize} = require('../index');
+
+const comp = (...fns) => {
+  fns = fns.filter(fn => fn);
+  return fns.length
+    ? new Transform({
+        writableObjectMode: true,
+        readableObjectMode: true,
+        transform(chunk, encoding, callback) {
+          next(chunk, fns, 0, value => sanitize(value, this)).then(() => callback(null), error => callback(error));
+        }
+      })
+    : null;
+};
+
+module.exports = comp;