support custom sheet

google-script.js

@@ -11,24 +11,40 @@
 function doPost(e) {
   try {
     var data = JSON.parse(e.postData.contents);
-    var sheet = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet();
+    var ss = SpreadsheetApp.getActiveSpreadsheet();
+    var sheet;
+
+    // 1. Get or Create the target sheet
+    if (data.sheetName) {
+      sheet = ss.getSheetByName(data.sheetName);
+      if (!sheet) {
+        sheet = ss.insertSheet(data.sheetName);
+      }
+    } else {
+      sheet = ss.getActiveSheet();
+    }
     
-    // Get headers
-    var headers = sheet.getRange(1, 1, 1, sheet.getLastColumn()).getValues()[0];
-    if (headers[0] === "" && sheet.getLastColumn() === 1) {
-      // New sheet, set headers from JSON keys
+    // 2. Get headers
+    var lastCol = sheet.getLastColumn();
+    var headers = [];
+    if (lastCol > 0) {
+      headers = sheet.getRange(1, 1, 1, lastCol).getValues()[0];
+    }
+
+    // 3. If sheet is empty, set headers from JSON keys
+    if (headers.length === 0 || headers[0] === "") {
       headers = Object.keys(data);
       sheet.appendRow(headers);
     }
     
-    // Map data to headers
+    // 4. Map data to headers
     var row = headers.map(function(header) {
-      return data[header] || "N/A";
+      return data[header] !== undefined ? data[header] : "N/A";
     });
     
     sheet.appendRow(row);
     
-    return ContentService.createTextOutput(JSON.stringify({ status: "success" }))
+    return ContentService.createTextOutput(JSON.stringify({ status: "success", sheet: sheet.getName() }))
       .setMimeType(ContentService.MimeType.JSON);
       
   } catch (error) {
@@ -37,7 +53,6 @@ function doPost(e) {
   }
 }
 
-// Handle preflight (for some environments, though 'no-cors' usually avoids this)
 function doOptions(e) {
   return ContentService.createTextOutput("")
     .setMimeType(ContentService.MimeType.TEXT);