support edit

google-script.js

@@ -24,41 +24,51 @@ function doPost(e) {
       sheet = ss.getActiveSheet();
     }
     
-    var headers = [];
-    
-    // 2. Determine headers
-    if (sheet.getLastRow() === 0) {
-      // Use provided headers if available
-      if (data.headers && Array.isArray(data.headers)) {
-        headers = data.headers;
-      } else {
-        // Fallback: Use keys but exclude internal control keys
-        headers = Object.keys(data).filter(function(key) {
-          return !["sheetName", "headers"].includes(key);
-        });
-      }
-      sheet.appendRow(headers);
+    var existingHeaders = [];
+    var lastCol = sheet.getLastColumn();
+    var lastRow = sheet.getLastRow();
+
+    // 2. Get incoming headers (from data.headers or keys)
+    var incomingHeaders = data.headers || Object.keys(data).filter(function(k) {
+      return !["sheetName", "headers"].includes(k);
+    });
+
+    if (lastRow === 0) {
+      // New sheet: Write all incoming headers as the first row
+      existingHeaders = incomingHeaders;
+      sheet.appendRow(existingHeaders);
     } else {
-      // Get existing headers from the first row
-      var lastCol = sheet.getLastColumn();
-      if (lastCol > 0) {
-        headers = sheet.getRange(1, 1, 1, lastCol).getValues()[0];
+      // Existing sheet: Read current headers from row 1
+      existingHeaders = sheet.getRange(1, 1, 1, lastCol).getValues()[0];
+      
+      // Find headers that are in 'incoming' but not in 'existing'
+      var missingHeaders = incomingHeaders.filter(function(h) {
+        return existingHeaders.indexOf(h) === -1;
+      });
+      
+      if (missingHeaders.length > 0) {
+        // Append missing headers to the end of row 1
+        sheet.getRange(1, lastCol + 1, 1, missingHeaders.length).setValues([missingHeaders]);
+        // Update local existingHeaders list to include new ones
+        existingHeaders = existingHeaders.concat(missingHeaders);
       }
     }
     
-    // 3. Map data to headers
-    var row = headers.map(function(header) {
+    // 3. Map data to the (potentially updated) existingHeaders
+    var row = existingHeaders.map(function(header) {
       var val = data[header];
       if (val === undefined || val === null) return "N/A";
-      // If value is an object or array, stringify it to avoid [Ljava.lang.Object]
       if (typeof val === 'object') return JSON.stringify(val);
       return val;
     });
     
     sheet.appendRow(row);
     
-    return ContentService.createTextOutput(JSON.stringify({ status: "success", sheet: sheet.getName() }))
-      .setMimeType(ContentService.MimeType.JSON);
+    return ContentService.createTextOutput(JSON.stringify({ 
+      status: "success", 
+      sheet: sheet.getName(),
+      addedColumns: missingHeaders ? missingHeaders.length : 0 
+    })).setMimeType(ContentService.MimeType.JSON);
       
   } catch (error) {
     return ContentService.createTextOutput(JSON.stringify({ status: "error", message: error.toString() }))