csvReader follows dbgate stream api

packages/api/src/shell/csvReader.js

@@ -1,15 +1,54 @@
+const _ = require('lodash');
 const csv = require('csv');
 const fs = require('fs');
+const stream = require('stream');
 
-async function csvReader({ fileName, encoding = 'utf-8', ...options }) {
+class CsvPrepareStream extends stream.Transform {
+  constructor({ header }) {
+    super({ objectMode: true });
+    this.structure = null;
+    this.header = header;
+  }
+  _transform(chunk, encoding, done) {
+    if (this.structure) {
+      this.push(
+        _.zipObject(
+          this.structure.columns.map((x) => x.columnName),
+          chunk
+        )
+      );
+      done();
+    } else {
+      if (this.header) {
+        this.structure = { columns: chunk.map((columnName) => ({ columnName })) };
+        this.push(this.structure);
+      } else {
+        this.structure = { columns: chunk.map((value, index) => ({ columnName: `col${index + 1}` })) };
+        this.push(this.structure);
+        this.push(
+          _.zipObject(
+            this.structure.columns.map((x) => x.columnName),
+            chunk
+          )
+        );
+      }
+      done();
+    }
+  }
+}
+
+async function csvReader({ fileName, encoding = 'utf-8', header = true, delimiter, quoted }) {
   console.log(`Reading file ${fileName}`);
   const csvStream = csv.parse({
-    columns: true,
-    ...options,
+    // @ts-ignore
+    delimiter,
+    quoted,
   });
   const fileStream = fs.createReadStream(fileName, encoding);
+  const csvPrepare = new CsvPrepareStream({ header });
   fileStream.pipe(csvStream);
-  return csvStream;
+  csvStream.pipe(csvPrepare);
+  return csvPrepare;
 }
 
 module.exports = csvReader;