SYNC: Merge pull request #3 from dbgate/feature/zip

packages/api/src/shell/unzipJsonLinesFile.js

@@ -0,0 +1,59 @@
+const yauzl = require('yauzl');
+const fs = require('fs');
+const { jsonLinesParse } = require('dbgate-tools');
+
+function unzipJsonLinesFile(zipPath, fileInZip) {
+  return new Promise((resolve, reject) => {
+    // Open the zip file
+    yauzl.open(zipPath, { lazyEntries: true }, (err, zipfile) => {
+      if (err) {
+        return reject(err);
+      }
+
+      let result = null;
+
+      // Start reading entries
+      zipfile.readEntry();
+
+      zipfile.on('entry', entry => {
+        if (entry.fileName == fileInZip) {
+          zipfile.openReadStream(entry, (err, readStream) => {
+            if (err) {
+              return reject(err);
+            }
+
+            const chunks = [];
+            readStream.on('data', chunk => chunks.push(chunk));
+            readStream.on('end', () => {
+              try {
+                const fileContent = Buffer.concat(chunks).toString('utf-8');
+                const parsedJson = jsonLinesParse(fileContent);
+                result = parsedJson;
+              } catch (parseError) {
+                return reject(parseError);
+              }
+
+              // Move to the next entry
+              zipfile.readEntry();
+            });
+          });
+        } else {
+          // Not a JSON file, skip
+          zipfile.readEntry();
+        }
+      });
+
+      // Resolve when no more entries
+      zipfile.on('end', () => {
+        resolve(result);
+      });
+
+      // Catch errors from zipfile
+      zipfile.on('error', zipErr => {
+        reject(zipErr);
+      });
+    });
+  });
+}
+
+module.exports = unzipJsonLinesFile;