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<?php if(!defined('IN_GS')){ die('you cannot load this page directly.'); }
/**
 * Plugin Functions
 *
 * @package GetSimple
 * @subpackage Plugin-Functions
 */

$plugins          = array();  // used for option names
$plugins_info     = array();
$filters          = array();
$live_plugins     = array();  // used for enablie/disable functions
$GS_scripts       = array();  // used for queing Scripts
$GS_styles        = array();  // used for queing Styles

// constants
// asseturl is scheme-less ://url if GSASSETSCHEMES is not true
$ASSETURL = getDef('GSASSETSCHEMES',true) !==true ? str_replace(parse_url($SITEURL, PHP_URL_SCHEME).':', '', $SITEURL) : $SITEURL;

define('GSFRONT',1);
define('GSBACK',2);
define('GSBOTH',3);

$GS_script_assets = array(); // defines asset scripts
$GS_style_assets  = array();  // defines asset styles

$GS_asset_objects = array(); // holds asset js object names
$GS_asset_objects['jquery']    = 'jQuery';
$GS_asset_objects['jquery-ui'] = 'jQuery.ui';

// jquery
$jquery_ver    = '1.7.1';
$jquery_ui_ver = '1.8.17';

$GS_script_assets['jquery']['cdn']['url']      = '//ajax.googleapis.com/ajax/libs/jquery/'.$jquery_ver.'/jquery.min.js';
$GS_script_assets['jquery']['cdn']['ver']      = $jquery_ver;

$GS_script_assets['jquery']['local']['url']    = $ASSETURL.$GSADMIN.'/template/js/jquery.min.js';
$GS_script_assets['jquery']['local']['ver']    = $jquery_ver;

// jquery-ui
$GS_script_assets['jquery-ui']['cdn']['url']   = '//ajax.googleapis.com/ajax/libs/jqueryui/'.$jquery_ui_ver.'/jquery-ui.min.js';
$GS_script_assets['jquery-ui']['cdn']['ver']   = $jquery_ui_ver;

$GS_script_assets['jquery-ui']['local']['url'] = $ASSETURL.$GSADMIN.'/template/js/jquery-ui.min.js';
$GS_script_assets['jquery-ui']['local']['ver'] = $jquery_ui_ver;

// misc
$GS_script_assets['fancybox']['local']['url']  = $ASSETURL.$GSADMIN.'/template/js/fancybox/jquery.fancybox.pack.js';
$GS_script_assets['fancybox']['local']['ver']  = '2.0.4';

$GS_style_assets['fancybox']['local']['url']   =  $ASSETURL.$GSADMIN.'/template/js/fancybox/jquery.fancybox.css';
$GS_style_assets['fancybox']['local']['ver']   = '2.0.4';

// scrolltofixed
$GS_script_assets['scrolltofixed']['local']['url']   =  $ASSETURL.$GSADMIN.'/template/js/jquery-scrolltofixed.js';
$GS_script_assets['scrolltofixed']['local']['ver']   = '0.0.1';

/**
 * Register shared javascript/css scripts for loading into the header
 */
if (!getDef('GSNOCDN',true)){
   
register_script('jquery', $GS_script_assets['jquery']['cdn']['url'], $GS_script_assets['jquery']['cdn']['ver'], FALSE);
   
register_script('jquery-ui',$GS_script_assets['jquery-ui']['cdn']['url'],$GS_script_assets['jquery-ui']['cdn']['ver'],FALSE);
} else {
   
register_script('jquery', $GS_script_assets['jquery']['local']['url'], $GS_script_assets['jquery']['local']['ver'], FALSE);
   
register_script('jquery-ui',$GS_script_assets['jquery-ui']['local']['url'],$GS_script_assets['jquery-ui']['local']['ver'],FALSE);
}
register_script('fancybox', $GS_script_assets['fancybox']['local']['url'], $GS_script_assets['fancybox']['local']['ver'],FALSE);
register_style('fancybox-css', $GS_style_assets['fancybox']['local']['url'], $GS_style_assets['fancybox']['local']['ver'], 'screen');

register_script('scrolltofixed', $GS_script_assets['scrolltofixed']['local']['url'], $GS_script_assets['scrolltofixed']['local']['ver'],FALSE);

/**
 * Queue our scripts and styles for the backend
 */
queue_script('jquery', GSBACK);
queue_script('jquery-ui', GSBACK);
queue_script('fancybox', GSBACK);

queue_style('fancybox-css',GSBACK);

/**
 * Include any plugins, depending on where the referring
 * file that calls it we need to set the correct paths.
*/
if (file_exists(GSPLUGINPATH)){
   
$pluginfiles = getFiles(GSPLUGINPATH);
}

$pluginsLoaded=false;


// Check if data\other\plugins.xml exists
if (!file_exists(GSDATAOTHERPATH."plugins.xml")){
   
create_pluginsxml();
}

read_pluginsxml();        // get the live plugins into $live_plugins array

if(!is_frontend()) create_pluginsxml();      // check that plugins have not been removed or added to the directory

// load each of the plugins
foreach ($live_plugins as $file=>$en) {
 
$pluginsLoaded=true;
 
# debugLog("plugin: $file" . " exists: " . file_exists(GSPLUGINPATH . $file) ." enabled: " . $en);
 
if ($en=='true' && file_exists(GSPLUGINPATH . $file)){
    require_once(
GSPLUGINPATH . $file);
  } else {
    if(!
is_frontend() and get_filename_id() == 'plugins'){
     
$apiback = get_api_details('plugin', $file);
     
$response = json_decode($apiback);
      if (
$response and $response->status == 'successful') {
       
register_plugin( pathinfo_filename($file), $file, 'disabled', $response->owner, '', i18n_r('PLUGIN_DISABLED'), '', '');
      } else {
       
register_plugin( pathinfo_filename($file), $file, 'disabled', 'Unknown', '', i18n_r('PLUGIN_DISABLED'), '', '');
      }
    } else {
       
register_plugin( pathinfo_filename($file), $file, 'disabled', 'Unknown', '', i18n_r('PLUGIN_DISABLED'), '', '');
    }  
  }
}

/**
 * change_plugin
 *
 * Enable/Disable a plugin
 *
 * @since 2.04
 * @uses $live_plugins
 *
 * @param $name
 * @param $active bool default=null, sets plugin active | inactive else toggle
 */
function change_plugin($name,$active=null){
  global
$live_plugins;  
     if (isset(
$live_plugins[$name])){
   
     
// set plugin active | inactive
     
if(isset($active) and is_bool($active)) {
       
$live_plugins[$name] = $active ? 'true' : 'false';              
       
create_pluginsxml(true);
        return;
      }

     
// else we toggle
     
if ($live_plugins[$name]=="true"){
       
$live_plugins[$name]="false";
      } else {
       
$live_plugins[$name]="true";
      }

     
create_pluginsxml(true);
    }
}


/**
 * read_pluginsxml
 *
 * Read in the plugins.xml file and populate the $live_plugins array
 *
 * @since 2.04
 * @uses $live_plugins
 *
 */
function read_pluginsxml(){
  global
$live_plugins;  
   
 
$data = getXML(GSDATAOTHERPATH . "plugins.xml");
  if(
$data){
     
$componentsec = $data->item;
      if (
count($componentsec) != 0) {
            foreach (
$componentsec as $component) {
             
$live_plugins[trim((string)$component->plugin)]=trim((string)$component->enabled);
            }
      }
    }
}


/**
 * create_pluginsxml
 *
 * If the plugins.xml file does not exists, read in each plugin
 * and add it to the file.
 * read_pluginsxml() is called again to repopulate $live_plugins
 *
 * @since 2.04
 * @uses $live_plugins
 *
 */
function create_pluginsxml($force=false){
  global
$live_plugins;  
  if (
file_exists(GSPLUGINPATH)){
   
$pluginfiles = getFiles(GSPLUGINPATH);
  }
 
$phpfiles = array();
  foreach (
$pluginfiles as $fi) {
    if (
lowercase(pathinfo($fi, PATHINFO_EXTENSION))=='php') {
     
$phpfiles[] = $fi;
    }
  }
  if (!
$force) {
   
$livekeys = array_keys($live_plugins);
    if (
count(array_diff($livekeys, $phpfiles))>0 || count(array_diff($phpfiles, $livekeys))>0) {
     
$force = true;
    }
  }
  if (
$force) {
   
$xml = @new SimpleXMLExtended('<?xml version="1.0" encoding="UTF-8"?><channel></channel>');
    foreach (
$phpfiles as $fi) {
     
$plugins = $xml->addChild('item');  
     
$p_note = $plugins->addChild('plugin');
     
$p_note->addCData($fi);
     
$p_note = $plugins->addChild('enabled');
      if (isset(
$live_plugins[(string)$fi])){
       
$p_note->addCData($live_plugins[(string)$fi]);    
      } else {
         
$p_note->addCData('false');
      }
    }
   
XMLsave($xml, GSDATAOTHERPATH."plugins.xml");  
   
read_pluginsxml();
  }

}


/**
 * Add Action
 *
 * @since 2.0
 * @uses $plugins
 * @uses $live_plugins
 *
 * @param string $hook_name
 * @param string $added_function
 * @param array $args
 */
function add_action($hook_name, $added_function, $args = array()) {
    global
$plugins;
    global
$live_plugins;
 
   
$bt = debug_backtrace();
   
$shift=count($bt) - 4;    // plugin name should be  
   
$caller = array_shift($bt);
   
$realPathName=pathinfo_filename($caller['file']);
   
$realLineNumber=$caller['line'];
    while (
$shift > 0) {
         
$caller = array_shift($bt);
         
$shift--;
    }
   
$pathName= pathinfo_filename($caller['file']);

    if ((isset (
$live_plugins[$pathName.'.php']) && $live_plugins[$pathName.'.php']=='true') || $shift<0 ){
        if (
$realPathName!=$pathName) {
           
$pathName=$realPathName;
           
$lineNumber=$realLineNumber;
        } else {
           
$lineNumber=$caller['line'];
        }
       
       
$plugins[] = array(
           
'hook' => $hook_name,
           
'function' => $added_function,
           
'args' => (array) $args,
           
'file' => $pathName.'.php',
       
'line' => $caller['line']
        );
      }
}

/**
 * Execute Action
 *
 * @since 2.0
 * @uses $plugins
 *
 * @param string $a Name of hook to execute
 */
function exec_action($a) {
    global
$plugins;
   
    foreach (
$plugins as $hook)    {
        if (
$hook['hook'] == $a) {
           
call_user_func_array($hook['function'], $hook['args']);
        }
    }
}

/**
 * Create Side Menu
 *
 * This adds a side level link to a control panel's section
 *
 * @since 2.0
 * @uses $plugins
 *
 * @param string $id ID of the link you are adding
 * @param string $txt Text to add to tabbed link
 */

function createSideMenu($id, $txt, $action=null, $always=true){
 
$current = false;
  if (isset(
$_GET['id']) && $_GET['id'] == $id && (!$action || isset($_GET[$action]))) {
   
$current = true;
  }
  if (
$always || $current) {
    echo
'<li id="sb_'.$id.'" class="plugin_sb"><a href="load.php?id='.$id.($action ? '&amp;'.$action : '').'" '.($current ? 'class="current"' : '').' >'.$txt.'</a></li>';
  }
}

/**
 * Create Navigation Tab
 *
 * This adds a top level tab to the control panel
 *
 * @since 2.0
 * @uses $plugins
 *
 * @param string $id Id of current page
 * @param string $txt Text to add to tabbed link
 * @param string $klass class to add to a element
 */
function createNavTab($tabname, $id, $txt, $action=null) {
  global
$plugin_info;
 
$current = false;
  if (
basename($_SERVER['PHP_SELF']) == 'load.php') {
   
$plugin_id = @$_GET['id'];
    if (
$plugin_info[$plugin_id]['page_type'] == $tabname) $current = true;
  }
  echo
'<li id="nav_'.$id.'" class="plugin_tab"><a href="load.php?id='.$id.($action ? '&amp;'.$action : '').'" '.($current ? 'class="current"' : '').' >'.$txt.'</a></li>';
}

/**
 * Register Plugin
 *
 * @since 2.0
 * @uses $plugin_info
 *
 * @param string $id Unique ID of your plugin
 * @param string $name Name of the plugin
 * @param string $ver Optional, default is null.
 * @param string $auth Optional, default is null.
 * @param string $auth_url Optional, default is null.
 * @param string $desc Optional, default is null.
 * @param string $type Optional, default is null. This is the page type your plugin is classifying itself
 * @param string $loaddata Optional, default is null. This is the function that run on load
 */
function register_plugin($id, $name, $ver=null, $auth=null, $auth_url=null, $desc=null, $type=null, $loaddata=null) {
    global
$plugin_info;
   
   
$plugin_info[$id] = array(
     
'name' => $name,
     
'version' => $ver,
     
'author' => $auth,
     
'author_url' => $auth_url,
     
'description' => $desc,
     
'page_type' => $type,
     
'load_data' => $loaddata
   
);

}


/**
 * Add Filter
 *
 * @since 2.0
 * @uses $filters
 * @uses $live_plugins
 *
 * @param string $id Id of current page
 * @param string $txt Text to add to tabbed link
 */
function add_filter($filter_name, $added_function) {
  global
$filters;
  global
$live_plugins;  
 
$bt = debug_backtrace();
 
$caller = array_shift($bt);
 
$pathName= pathinfo_filename($caller['file']);
   
$filters[] = array(
       
'filter' => $filter_name,
       
'function' => $added_function
   
);
}

/**
 * Execute Filter
 *
 * Allows changing of the passed variable
 *
 * @since 2.0
 * @uses $filters
 *
 * @param string $script Filter name to execute
 * @param array $data
 */
function exec_filter($script,$data=array()) {
    global
$filters;
    foreach (
$filters as $filter)    {
        if (
$filter['filter'] == $script) {
           
$data = call_user_func_array($filter['function'], array($data));
        }
    }
    return
$data;
}

/**
 * Register Script
 *
 * Register a script to include in Themes
 *
 * @since 3.1
 * @uses $GS_scripts
 *
 * @param string $handle name for the script
 * @param string $src location of the src for loading
 * @param string $ver script version
 * @param boolean $in_footer load the script in the footer if true
 */
function register_script($handle, $src, $ver, $in_footer=FALSE){
    global
$GS_scripts;
   
$GS_scripts[$handle] = array(
     
'name' => $handle,
     
'src' => $src,
     
'ver' => $ver,
     
'in_footer' => $in_footer,
     
'where' => 0
   
);
}

/**
 * De-Register Script
 *
 * Deregisters a script
 *
 * @since 3.1
 * @uses $GS_scripts
 *
 * @param string $handle name for the script to remove
 */
function deregister_script($handle){
    global
$GS_scripts;
    if (
array_key_exists($handle, $GS_scripts)){
        unset(
$GS_scripts[$handle]);
    }
}

/**
 * Queue Script
 *
 * Queue a script for loading
 *
 * @since 3.1
 * @uses $GS_scripts
 *
 * @param string $handle name for the script to load
 */
function queue_script($handle,$where){
    global
$GS_scripts;
    if (
array_key_exists($handle, $GS_scripts)){
       
$GS_scripts[$handle]['load']=true;
       
$GS_scripts[$handle]['where']=$GS_scripts[$handle]['where'] | $where;
    }
}

/**
 * De-Queue Script
 *
 * Remove a queued script
 *
 * @since 3.1
 * @uses $GS_scripts
 *
 * @param string $handle name for the script to load
 */
function dequeue_script($handle, $where){
    global
$GS_scripts;
    if (
array_key_exists($handle, $GS_scripts)){
       
$GS_scripts[$handle]['load']=false;
       
$GS_scripts[$handle]['where']=$GS_scripts[$handle]['where'] & ~ $where;
    }
}

/**
 * Get Scripts
 *
 * Echo and load scripts
 *
 * @since 3.1
 * @uses $GS_scripts
 *
 * @param boolean $footer Load only script with footer flag set
 */
function get_scripts_frontend($footer=FALSE){
    global
$GS_scripts;
    if (!
$footer){
       
get_styles_frontend();
    }
    foreach (
$GS_scripts as $script){
        if (
$script['where'] & GSFRONT ){
            if (!
$footer){
                if (
$script['load']==TRUE && $script['in_footer']==FALSE ){
                     echo
"\t<script src=\"".$script['src'].'?v='.$script['ver']."\"></script>\n";
                     
cdn_fallback($script);                              
                }
            } else {
                if (
$script['load']==TRUE && $script['in_footer']==TRUE ){
                     echo
"\t<script src=\"".$script['src'].'?v='.$script['ver']."\"></script>\n";
                     
cdn_fallback($script);                              
                }
            }
        }
    }
}

/**
 * Get Scripts
 *
 * Echo and load scripts
 *
 * @since 3.1
 * @uses $GS_scripts
 *
 * @param boolean $footer Load only script with footer flag set
 */
function get_scripts_backend($footer=FALSE){
    global
$GS_scripts;
    if (!
$footer){
       
get_styles_backend();
    }

   
# debugLog($GS_scripts);
   
foreach ($GS_scripts as $script){
        if (
$script['where'] & GSBACK ){    
            if (!
$footer){
                if (
$script['load']==TRUE && $script['in_footer']==FALSE ){
                     echo
"\t<script src=\"".$script['src'].'?v='.$script['ver']."\"></script>\n";
                     
cdn_fallback($script);        
                }
            } else {
                if (
$script['load']==TRUE && $script['in_footer']==TRUE ){
                     echo
"\t<script src=\"".$script['src'].'?v='.$script['ver']."\"></script>\n";
                     
cdn_fallback($script);                              
                }
            }
        }
    }
}

/**
 * Add javascript for cdn fallback to local
 * get_scripts_backend helper
 * @param  array $script gsscript array
 */
function cdn_fallback($script){
    GLOBAL
$GS_script_assets, $GS_asset_objects;    
    if (
getDef('GSNOCDN',true)) return; // if nocdn skip
   
if($script['name'] == 'jquery' || $script['name'] == 'jquery-ui'){
        echo
"\t<script>";
        echo
"window.".$GS_asset_objects[$script['name']]." || ";
        echo
"document.write('<!-- CDN FALLING BACK --><script src=\"".$GS_script_assets[$script['name']]['local']['url'].'?v='.$GS_script_assets[$script['name']]['local']['ver']."\"><\/script>');";
        echo
"</script>\n";
    }                    
}

/**
 * Queue Style
 *
 * Queue a Style for loading
 *
 * @since 3.1
 * @uses $GS_styles
 *
 * @param string $handle name for the Style to load
 */
function queue_style($handle,$where=1){
    global
$GS_styles;
    if (
array_key_exists($handle, $GS_styles)){
       
$GS_styles[$handle]['load']=true;
       
$GS_styles[$handle]['where']=$GS_styles[$handle]['where'] | $where;
    }
}

/**
 * De-Queue Style
 *
 * Remove a queued Style
 *
 * @since 3.1
 * @uses $GS_styles
 *
 * @param string $handle name for the Style to load
 */
function dequeue_style($handle,$where){
    global
$GS_styles;
    if (
array_key_exists($handle, $GS_styles)){
       
$GS_styles[$handle]['load']=false;
       
$GS_styles[$handle]['where']=$GS_styles[$handle]['where'] & ~$where;
    }
}

/**
 * Register Style
 *
 * Register a Style to include in Themes
 *
 * @since 3.1
 * @uses $GS_scripts
 *
 * @param string $handle name for the Style
 * @param string $src location of the src for loading
 * @param string $ver Style version
 * @param string $media load the Style in the footer if true
 */
function register_style($handle, $src, $ver, $media){
    global
$GS_styles;
   
$GS_styles[$handle] = array(
     
'name' => $handle,
     
'src' => $src,
     
'ver' => $ver,
     
'media' => $media,
     
'where' => 0
   
);    
}

/**
 * Get Styles Frontend
 *
 * Echo and load Styles in the Theme header
 *
 * @since 3.1
 * @uses $GS_styles
 *
 */
function get_styles_frontend(){
    global
$GS_styles;
    foreach (
$GS_styles as $style){
        if (
$style['where'] & GSFRONT ){
                if (
$style['load']==TRUE){
                    echo
"\t".'<link href="'.$style['src'].'?v='.$style['ver'].'" rel="stylesheet" media="'.$style['media']."\">\n";
                }
        }
    }
}
/**
 * Get Styles Backend
 *
 * Echo and load Styles on Admin
 *
 * @since 3.1
 * @uses $GS_styles
 *
 */
function get_styles_backend(){
    global
$GS_styles;
    foreach (
$GS_styles as $style){
        if (
$style['where'] & GSBACK ){
                if (
$style['load']==TRUE){
                    echo
"\t".'<link href="'.$style['src'].'?v='.$style['ver'].'" rel="stylesheet" media="'.$style['media']."\">\n";
                }
        }
    }
}
?>