Add an import feature for import Trello board as JSON to Planka

server/api/helpers/download-import-data.js

@@ -0,0 +1,33 @@
+const util = require('util');
+const stream = require('stream');
+const streamToArray = require('stream-to-array');
+
+module.exports = {
+  sync: true,
+
+  fn(inputs, exits) {
+    const receiver = stream.Writable({
+      objectMode: true,
+    });
+
+    let firstFileHandled = false;
+    // eslint-disable-next-line no-underscore-dangle
+    receiver._write = async (file, receiverEncoding, done) => {
+      if (firstFileHandled) {
+        file.pipe(new stream.Writable());
+
+        return done();
+      }
+      firstFileHandled = true;
+
+      const buffer = await streamToArray(file).then((parts) =>
+        Buffer.concat(parts.map((part) => (util.isBuffer(part) ? part : Buffer.from(part)))),
+      );
+      // eslint-disable-next-line no-param-reassign
+      file.extra = buffer.toString('UTF-8');
+      return done();
+    };
+
+    return exits.success(receiver);
+  },
+};