/*
Version 3.  BIG change to the Image upload section.
John Porra - 13 Feb 2003.
*/
// Predefined match values.
var ImageThumb = "/_TH_/gi.test(newfilename) && (/.gif$/gi.test(newfilename) || /.jpg$/gi.test(newfilename))";
var ImageNotThumb = "(!/_TH_/gi.test(newfilename)) && (/.gif$/gi.test(newfilename) || /.jpg$/gi.test(newfilename))";
var PDFonly = "(/.PDF/gi.test(newfilename))";
var ImageGifJpg = "(/.gif$/gi.test(newfilename) || /.jpg$/gi.test(newfilename))";

/**************************************************FUNCTION getUpload(control as document.forms[?].control , field as string , match as RegExpression, ImgRef as string, width as integer, height as integer, name as string )  ***************************************************/

function getupload(control, field, match, ImgRef, width, height, name) {
/*
This function looks at the values placed into a file upload control, and marks for deletion the files that have already been uploaded, ONLY if the file isnt used or is being replaced.
The arguments:
control : The file upload control that is being used
field      : The name of the field that stores the filename of the last object to be uploaded
match  : An optional string that is evaluated to perform tests on the file that is being uploaded.
               * Note, you can use the variable 'oldname' for reference to the old file name, and 'newfilename' for a reference of the new file name.
               * Contruct the match expression to check for conditions that you wish to hapen.
ImgRef : Name of the image on the form to replace when blured.  If left off, it's not used.
                 If ImgRef is not set, then the width and height values are ignored.
width     : the number of pixels for an image.  if left out, then it is not used.
height     : the number of pixels for an image.  if left out, then it is not used.
*/
 var form = document.forms[0];
 var newname = control.value;  // filename from upload control
 if (newname=="") return;
 var oldname = form[field].value; // old filename

var thisarray = newname.split('\\'); // split on backslash
var newfilename = thisarray[thisarray.length-1]; // get bit after last backslash
var sizeError = "";
if (match != null)
{
   if( eval(match) == false)
   {
       alert("This file is not valid.  Please choose another file");
       return;
   }else
   {
       if (ImgRef != null)
       { // try to load the file selected in the upload into the image of that name.  Asumes that the image object is in document.forms[0]
           if (! is_nav)
           {
               NewImage = new Image()
               NewImage.src = "file:///"+control.value;
               eval("document.forms[0]."+ImgRef+".src = NewImage.src");
               addToImgSizeList(control, NewImage, height, width, name, field) ;
          
          }
       }
   }
 if (oldname!="") { // look at deleting the image
 var deleteimage = false;  // should we delete the old image?
 var olditemcount = 0; // count of the items that have the old image
 if (oldname==newfilename)
    deleteimage = true;

  for ( i=0; i<form.elements.length; i++) {
     if (form.elements[i].type== "hidden" && form.elements[i].value ==oldname) olditemcount ++; // Record that one more item has the same value of oldname
    }
if(olditemcount <= 1) deleteimage = true; // if we have found one or less uploads that use oldname then we delete the attachment
}
if (deleteimage)
{
  for ( i=0; i<form.elements.length; i++) {
   if ( form.elements[i].value==oldname) form.elements[i].checked = true; // check the delete attachment at bottom of form
  }
}
 }


 
 form[field].value = newfilename; // record that we have loaded a new file
 return
}

// this array is an array of ImageChecker objects.
var imagesizelist = new Array();

/*
The following function defines the ImageChecker object.
*/
function ImageChecker(oControl, oImg, height, width, name, field)
{
this.oImg = oImg;
this.height = height;
this.width = width;
this.oControl = oControl;
this.name = name;
this.field = field;
}


// Add the values to the imagesizelist array, converting them to an ImageChecker object first..

function addToImgSizeList(oControl,oImg, height, width, name, field)
{
    // look through the existing list to see if there is already something for this control.  if there is, then replace it, otherwise add a new one.
  
   if (imagesizelist.length ==0)
   {
       imagesizelist[imagesizelist.length] = new ImageChecker(oControl, oImg, height, width, name, field)
   } else
   {
       // look through the array and see if this control is there already.
       var found = -1;
       for (i = 0; i < imagesizelist.length; i++)
          {
            if (imagesizelist[i].oControl == oControl) 
            {
                 found = i;
                 imagesizelist[i] = new ImageChecker(oControl, oImg, height, width, name, field)
            }
          }
        if (found == -1) {  imagesizelist[imagesizelist.length] = new ImageChecker(oControl, oImg, height, width, name, field); }
   }
}

// use this to check the image size. and alert the user.
function CheckImageSize(oImageChecker)
{
      var sizeError = "";
     // look at the height and width stuff, and figure out if they match.
               if (oImageChecker.width != null)
               {
                   if (oImageChecker.oImg.complete==false)
                       alert('Your image is being checked\nto make sure it is the right size.\nPlease click OK.');
                   if (oImageChecker.oImg.width != oImageChecker.width)
                   {                 
                       sizeError += "The width of "+oImageChecker.name+" should be "+oImageChecker.width+" pixels.\nYour image is "+oImageChecker.oImg.width+" pixels.\n";
                    }
                }
               if (oImageChecker.height != null)
               {
                   if (oImageChecker.oImg.complete==false)
                        alert('Your image is being checked\nto make sure it is the right size.\nPlease click OK.');
                   if (oImageChecker.oImg.height != oImageChecker.height)
                   {                 
                       sizeError += "The height of "+oImageChecker.name+" should be "+oImageChecker.height+" pixels.\nYour image is "+oImageChecker.oImg.height+" pixels.\n";
                    }
                }
              if (sizeError != "")
              {
                    return confirm ("WARNING!\n"+sizeError +"\n\nClick OK to continue reguardless\nOR Cancel to adjust the image yourself and re-try.");
                     
              }
              return true;
}

function CheckAllImageSizes()
{
    var vOk = true;
    var form = document.forms[0];
    form["imagesizes"].value = "";
       for (i = 0; i < imagesizelist.length; i++)
          {
            form["imagesizes"].value += imagesizelist[i].field+"#"+imagesizelist[i].oImg.width+"x"+imagesizelist[i].oImg.height+"^"+imagesizelist[i].width+"x"+imagesizelist[i].height+";";
            vOk &=  CheckImageSize(imagesizelist[i]);
          }
     return vOk;
}