//location of a text file in the following format
//fieldname:Field Label:Field Value
var listdata = '/dada_mail_support_files/data/selectdata.txt';
var debug = 0;
//put here for debugging
function debugArray( testArray, debugTag ) {
   if (debug == 0) return;
   for (key in testArray) {
      alert(debugTag + ": key " + key + " has value " + testArray[key]);
   }   
}

function debugAlert( msg ) {
   if (debug == 0) return;
   alert( msg );
}


// this function is used to replace the profile text field with 
// a profile select field after the form is rendered
function createSelectField( oldObject, options, fieldName ) { 
   // if this is a text field, we convert it to a select field  
   if ( oldObject.type == 'text' ) {
      // create select field
      var newObject = document.createElement('select');
      // set name/id of the select field to that of the old text field
      if(oldObject.name) newObject.name = oldObject.name;
      if(oldObject.id) newObject.id = oldObject.id;
      //replace the old text field with the new select field
      oldObject.parentNode.replaceChild(newObject,oldObject);
   } else {
      var newObject = oldObject;
   }
   // add an empty option to the top to facilitate validation if required.
   var myDefaultOption = document.createElement("option");
   myDefaultOption.text = "";
   myDefaultOption.value = "";
   newObject.appendChild(myDefaultOption);
   // if this select already has a value filled in, we want to store it for later 
   // so we can mark it as selected.
   var preFilled = "";
   if ( oldObject.value.length > 0 ) {
      preFilled = oldObject.value;
   }  
              
   // now populate the slect options from the data file
   for (var z=0;z<options.length;z++) {
            if ( options[z].length > 1 ) {
                  var optionValue = options[z].split(':');
                  if ( optionValue[0] == fieldName ) {
                     var myOption = document.createElement("option");
                     myOption.text = optionValue[1];
                     // remove all the newline characters.
                     optionValue[2] = optionValue[2].replace(/(\r\n|\n|\r)/gm,"");
                     myOption.value = optionValue[2];
                     // check to see if this option was previously selected and saved
                     if ( optionValue[2] === preFilled ) {
                        myOption.selected = true;    
                     }
                     newObject.appendChild(myOption);
                  }
            }
   }      
}
  
function uniqueValues( options ) {
      var uniqueFieldValues = [];
      for (var i=0;i<options.length;i++) {
            if ( options[i].length > 1 ) {
                  var optionValue = options[i].split(':');
                  uniqueFieldValues[optionValue[0]]=1;
            }
      }
      
      return uniqueFieldValues;
}

function checkForField( uniqueFieldValues, formObj, options ) {
         for (key in uniqueFieldValues) {
            // user templatre fields
            var formElementObj = formObj[key];
            if ( formElementObj ) {
               debugAlert("Form element found with name " + key);
               createSelectField(formElementObj, options, key);
               //var currentValue = formElementObj.value;
               
            }
            //check for admin template fields
            formElementObj = formObj['field_value_' + key];
            if ( formElementObj ) {
                  debugAlert("Admin Form element found with name " + key);
                  createSelectField(formElementObj, options, key);
            }
         }
}

//get all the forms on this page 
var forms = document.forms;
debugAlert("Custom Select: Checking for forms");
if ( forms.length > 0 ) {
   // there are forms on the page. So now we pull the data file   
   $(document).ready(function() {
      $.get(listdata, function(data) {
         // pull the text file and create an sorted array of options      
         var options = data.split('\n');
         options.sort();
         // now loop through the options and create an lookup array for quicker access
         var uniqueFieldsArray = uniqueValues( options );  
         debugArray( uniqueFieldsArray, 'uniqueFieldsArray' );           
         // now loop through forms and see if they contain the fields we want to change
         for(var x=0;x<forms.length;x++)
         {
            checkForField( uniqueFieldsArray, forms[x], options );
	 }    
      });
   }); 
              
}