export html file both from web page and electron

packages/api/src/controllers/databaseConnections.js

@@ -339,16 +339,15 @@ module.exports = {
   },
 
   generateDbDiffReport_meta: 'post',
-  async generateDbDiffReport({ sourceConid, sourceDatabase, targetConid, targetDatabase }) {
+  async generateDbDiffReport({ filePath, sourceConid, sourceDatabase, targetConid, targetDatabase }) {
     const unifiedDiff = await this.getUnifiedDiff({ sourceConid, sourceDatabase, targetConid, targetDatabase });
 
     const diffJson = parse(unifiedDiff);
     // $: diffHtml = html(diffJson, { outputFormat: 'side-by-side', drawFileList: false });
     const diffHtml = html(diffJson, { outputFormat: 'side-by-side' });
 
-    const fileName = `${uuidv1()}.html`;
-    await fs.writeFile(path.join(uploadsdir(), fileName), diff2htmlPage(diffHtml));
+    await fs.writeFile(filePath, diff2htmlPage(diffHtml));
 
-    return fileName;
+    return true;
   },
 };

packages/api/src/controllers/files.js

@@ -117,20 +117,29 @@ module.exports = {
     return res;
   },
 
-  exportChart_meta: 'post',
-  async exportChart({ title, config, image }) {
+  generateUploadsFile_meta: 'get',
+  async generateUploadsFile() {
     const fileName = `${uuidv1()}.html`;
+    return {
+      fileName,
+      filePath: path.join(uploadsdir(), fileName),
+    };
+  },
+
+  exportChart_meta: 'post',
+  async exportChart({ filePath, title, config, image }) {
+    const fileName = path.parse(filePath).base;
     const imageFile = `${fileName}.png`;
     const html = getChartExport(title, config, imageFile);
-    await fs.writeFile(path.join(uploadsdir(), fileName), html);
+    await fs.writeFile(filePath, html);
     if (image) {
       const index = image.indexOf('base64,');
       if (index > 0) {
         const data = image.substr(index + 'base64,'.length);
         const buf = Buffer.from(data, 'base64');
-        await fs.writeFile(path.join(uploadsdir(), imageFile), buf);
+        await fs.writeFile(filePath + '.png', buf);
       }
     }
-    return fileName;
+    return true;
   },
 };