SQL file export

packages/api/src/shell/index.js

@@ -8,6 +8,7 @@ const consoleObjectWriter = require('./consoleObjectWriter');
 const jsonLinesWriter = require('./jsonLinesWriter');
 const jsonArrayWriter = require('./jsonArrayWriter');
 const jsonLinesReader = require('./jsonLinesReader');
+const sqlDataWriter = require('./sqlDataWriter');
 const jslDataReader = require('./jslDataReader');
 const archiveWriter = require('./archiveWriter');
 const archiveReader = require('./archiveReader');
@@ -29,6 +30,7 @@ const dbgateApi = {
   jsonLinesWriter,
   jsonArrayWriter,
   jsonLinesReader,
+  sqlDataWriter,
   fakeObjectReader,
   consoleObjectWriter,
   jslDataReader,

packages/api/src/shell/sqlDataWriter.js

@@ -0,0 +1,48 @@
+const fs = require('fs');
+const stream = require('stream');
+const path = require('path');
+const { driverBase } = require('dbgate-tools');
+
+class SqlizeStream extends stream.Transform {
+  constructor({ fileName }) {
+    super({ objectMode: true });
+    this.wasHeader = false;
+    this.tableName = path.parse(fileName).name;
+  }
+  _transform(chunk, encoding, done) {
+    let skip = false;
+    if (!this.wasHeader) {
+      if (
+        chunk.__isStreamHeader ||
+        // TODO remove isArray test
+        Array.isArray(chunk.columns)
+      ) {
+        skip = true;
+        this.tableName = chunk.pureName;
+      }
+      this.wasHeader = true;
+    }
+    if (!skip) {
+      const dmp = driverBase.createDumper();
+      dmp.put(
+        '^insert ^into %f (%,i) ^values (%,v);\n',
+        { pureName: this.tableName },
+        Object.keys(chunk),
+        Object.values(chunk)
+      );
+      this.push(dmp.s);
+    }
+    done();
+  }
+}
+
+async function sqlDataWriter({ fileName, driver, encoding = 'utf-8' }) {
+  console.log(`Writing file ${fileName}`);
+  const stringify = new SqlizeStream({ fileName });
+  const fileStream = fs.createWriteStream(fileName, encoding);
+  stringify.pipe(fileStream);
+  stringify['finisher'] = fileStream;
+  return stringify;
+}
+
+module.exports = sqlDataWriter;