internal pages dropdown in link dialog

I read some posts here, that people have problems to link to there own pages like intern cms linking. Here is an easy way with a simple plugin and php.

Step 1:
Make a new folder named 'internlink' in /plugins folder.

Step 2:
Copy following to 'plugin.js' into /internlink folder:

CKEDITOR.plugins.add( 'internlink' );
CKEDITOR.scriptLoader.load( CKEDITOR.plugins.getPath( 'internlink' ) + 'internpages.php' );

CKEDITOR.on( 'dialogDefinition', function( ev )
{
   var dialogName = ev.data.name;
   var dialogDefinition = ev.data.definition;
   
   if ( dialogName == 'link' )
   {
        var infoTab = dialogDefinition.getContents('info');
        
        infoTab.add( {
         type : 'select',
         id : 'intern',
         label : 'Intern Page',
         'default' : '',
         style : 'width:100%',
         items : InternPagesSelectBox,
         onChange : function()
            {
                var d = CKEDITOR.dialog.getCurrent();
                d.setValueOf('info', 'url', this.getValue());
                d.setValueOf('info', 'protocol', !this.getValue() ? 'http://' : '');
            },
         setup : function( data )
         {
            this.allowOnChange = false;
            this.setValue( data.url ? data.url.url : '' );
            this.allowOnChange = true;
         }
        }, 'browse' );
        
        dialogDefinition.onLoad = function()
        {
            var internField = this.getContentElement( 'info', 'intern' );
            internField.reset();
        };
   }
} );

Step 3:
Copy following as 'internpages.php' to /internlink folder:

<?PHP

header('Content-type: application/javascript');
header('Cache-Control: no-store, no-cache, must-revalidate');
header('Cache-Control: post-check=0, pre-check=0, false');
header('Expires: Sat, 26 Jul 1997 05:00:00 GMT');
header('Pragma: no-cache');

/*
    The Example read files of a directory and outputs
    a javascript array. Output is:
    
    var InternPagesSelectBox = new Array(
        new Array( empty, empty ),
        new Array( name, link ),
        new Array( name, link )...
    );
    
    InternPagesSelectBox will loaded as select options
    to internlink plugin.
*/

$directory = $server_path."/pages";
$handle = opendir ($directory);

echo "var InternPagesSelectBox = new Array( new Array( '', '' )";
while (false !== ($file = readdir ($handle))) {
    if ( $file != "." && $file != ".." )
        echo ", new Array( '".$file."', 'index.php?page=".$file."' )";
}
echo " );\n";

closedir($handle);

?>

This code is only an example. Make changes, what you need is InternPagesSelectBox array. It's loaded to plugin as select options.

Step 4:
Load plugin with your config:

extraPlugins : 'internlink'

That's it