Update modify FITS header script

scripts/modify FITS header

@@ -12,10 +12,12 @@ if(files.length == 0)
     throw "";
 }
 
-let action = core.getItem(["UPDATE", "ADD", "REMOVE"], "Do you want update, add or remove record?");
+let action = core.getItem(["UPDATE", "UPDATE_ADD", "ADD", "REMOVE"], "Do you want update, add or remove record?");
 
 let modify = new FITSRecordModify();
 
+let proceed = false;
+
 if(action == "UPDATE")
 {
     let keywords = files[0].fitsKeywords().filter(checkFITS);
@@ -25,22 +27,48 @@ if(action == "UPDATE")
         value = core.getString("Enter new value", value);
     else
         value = core.getFloat("Enter new value", value);
+
+    if(keyword && value)
+    {
+        proceed = true;
         modify.updateKeyword(keyword, value);
     }
+}
+else if(action == "UPDATE_ADD")
+{
+    let keyword = core.getString("Enter keyword to update");
+    let value = core.getString("Enter new value");
+    if(keyword && value)
+    {
+        proceed = true;
+        keyword = keyword.toUpperCase();
+        modify.updateKeyword(keyword, value);
+    }
+}
 else if(action == "ADD")
 {
     let keyword = core.getString("Enter keyword to add");
     let value = core.getString("Enter new value");
+    if(keyword && value)
+    {
+        proceed = true;
         keyword = keyword.toUpperCase();
         modify.addKeyword(keyword, value);
     }
+}
 else if(action == "REMOVE")
 {
     let keywords = files[0].fitsKeywords().filter(checkFITS);
     let keyword = core.getItem(keywords, "Select keyword to remove");
+    if(keyword)
+    {
+        proceed = true;
         modify.removeKeyword(keyword);
     }
+}
 
+if(proceed)
+{
     for(file of files)
     {
         if(file.suffix() == "fits" || file.suffix() == "fit" || file.suffix() == "xisf")
@@ -49,4 +77,9 @@ for(file of files)
             file.modifyFITSRecords(modify);
         }
     }
+}
+else
+{
+    core.log("Canceled");
+}