Appelé une image propre à un utilisateur

<?php

//let us use the class to aboid name space collision with ever growing bp plugins

class BPProfileBGChanger{
  
    //php4 constructor
function BPProfileBGChanger(){
        $this->__construct();
    }
 //php5 constructor   
function __construct() {
      
      //load textdomain
      add_action ( 'bp_loaded', array(&$this,'load_textdomain'), 2 );
        //setup nav
      add_action( 'bp_xprofile_setup_nav',array(&$this,'setup_nav' ));
        
      //inject custom css class to body
      add_filter('body_class',array(&$this,'get_body_class'),30);
      //add css for background change
  
      add_action('wp_head',array(&$this,'inject_css'));
      add_action('wp_print_scripts',array(&$this,'inject_js'));
      add_action('wp_ajax_bppg_delete_bg',array(&$this,'ajax_delete_current_bg'));
        
}

//translation
function load_textdomain(){
        
    $locale = apply_filters( 'bp_custom_bg_for_profile_load_textdomain_get_locale', get_locale() );
     
	// if load .mo file
    if ( !empty( $locale ) ) {
		$mofile_default = sprintf( '%slanguages/%s.mo', plugin_dir_path(__FILE__), $locale );
              
		$mofile = apply_filters( 'bp_custom_bg_for_profile_load_textdomain_mofile', $mofile_default );
		
                if ( file_exists( $mofile ) ) {
                    // make sure file exists, and load it
			load_textdomain( 'bppg', $mofile );
		}
	} 
 
}
//adda sub nav to My profile for chaging Background
function setup_nav(){
    global $bp;
    $profile_link = $bp->loggedin_user->domain . $bp->profile->slug . '/';
    bp_core_new_subnav_item( array( 'name' => __( 'Change Background', 'bppg' ), 'slug' => 'change-bg', 'parent_url' => $profile_link, 'parent_slug' => $bp->profile->slug, 'screen_function' =>array(&$this,'screen_change_bg'), 'position' => 40 ) );
   
}

//screen function


function screen_change_bg(){
    global $bp;
    //if the form was submitted, update here
     if(!empty($_POST['bpprofbg_save_submit'])){
                if(!wp_verify_nonce($_POST['_wpnonce'],"bp_upload_profile_bg"))
                         die(__('Security check failed','bppbg'));
                //handle the upload
               if( $this->handle_upload())
                  bp_core_add_message(__('Background uploaded successfully!','bppg'));
               
              
}

    //hook the content
    add_action( 'bp_template_title', array(&$this,'page_title' ));
    add_action( 'bp_template_content',array(&$this, 'page_content') );
    bp_core_load_template( apply_filters( 'bp_core_template_plugin', 'members/single/plugins' ) );
}
    //Change Background Page title
function page_title(){
		echo '<h3>'.__('Profile Photo','bppbg').'</h3>';
}
    //Upload page content
function page_content(){
	  	   
	    ?>
    <form name="bpprofbpg_change" method="post" class="standard-form" enctype="multipart/form-data">
        
        <?php  $image_url=  bppg_get_image();
        if(!empty($image_url)):?>
        <div id="bg-delete-wrapper">
            
            <div class="current-bg">
                    <img src="<?php echo $image_URL;?>" alt="current background" />
            </div>
            <a href='#' id='bppg-del-image'><?php _e('Delete','bppg');?></a>
       </div>
       <?php endif;?> 
        <p><?php _e('If you want to change your profile background, please upload a new image.','bppg');?></p>
        <label for="bprpgbp_upload">
		<input type="file" name="file" id="bprpgbp_upload"  class="settings-input" />
	</label>
		
	<?php wp_nonce_field("bp_upload_profile_bg");?>
        <input type="hidden" name="action" id="action" value="bp_upload_profile_bg" />
	 <p class="submit"><input type="submit" id="bpprofbg_save_submit" name="bpprofbg_save_submit" class="button" value="<?php _e('Save','bppg') ?>" /></p>
	</form>
    <?php
}

//handles upload, a modified version of bp_core_avatar_handle_upload(from bp-core/bp-core-avatars.php)
function handle_upload( ) {
	global $bp;

	//include core files
	require_once( ABSPATH . '/wp-admin/includes/file.php' );
        $max_upload_size=$this->get_max_upload_size();
        $max_upload_size=$max_upload_size*1024;//convert kb to bytes
	$file=$_FILES;
        
        //I am not changing the domain of erro messages as these are same as bp, so you should have a translation for this
        $uploadErrors = array(
		0 => __('There is no error, the file uploaded with success', 'buddypress'),
		1 => __('Your image was bigger than the maximum allowed file size of: ', 'buddypress') . size_format($max_upload_size),
		2 => __('Your image was bigger than the maximum allowed file size of: ', 'buddypress') . size_format($max_upload_size),
		3 => __('The uploaded file was only partially uploaded', 'buddypress'),
		4 => __('No file was uploaded', 'buddypress'),
		6 => __('Missing a temporary folder', 'buddypress')
	);

	if ( $file['error'] ) {
		bp_core_add_message( sprintf( __( 'Your upload failed, please try again. Error was: %s', 'buddypress' ), $uploadErrors[$file['file']['error']] ), 'error' );
		return false;
	}

	if ( ! ($file['file']['size']<$max_upload_size) ) {
		bp_core_add_message( sprintf( __( 'The file you uploaded is too big. Please upload a file under %s', 'buddypress'), size_format($max_upload_size) ), 'error' );
		return false;
	}
        
	if ( ( !empty( $file['file']['type'] ) && !preg_match('/(jpe?g|gif|png)$/i', $file['file']['type'] ) ) || !preg_match( '/(jpe?g|gif|png)$/i', $file['file']['name'] ) )
	 {
		bp_core_add_message( __( 'Please upload only JPG, GIF or PNG photos.', 'buddypress' ), 'error' );
		return false;
	}


	$uploaded_file = wp_handle_upload( $file['file'], array( 'action'=> 'bp_upload_profile_bg' ) );

	//if file was not uploaded correctly
        if ( !empty($uploaded_file['error'] ) ) {
		bp_core_add_message( sprintf( __( 'Upload Failed! Error was: %s', 'buddypress' ), $uploaded_file['error'] ), 'error' );
		return false;
	}

        //assume that the file uploaded succesfully
        //delete any previous uploaded image
        self::delete_bg_for_user();
        //save in usermeta
        update_user_meta(bp_loggedin_user_id(),'profile_bg',$uploaded_file['url']);
        update_user_meta(bp_loggedin_user_id(),'profile_bg_file_path',$uploaded_file['file']);
        do_action('bppg_background_uploaded',$uploaded_file['url']);//allow to do some other actions when a new background is uploaded
	return true;
}

//get the allowed upload size
//there is no setting on single wp, on multisite, there is a setting, we will adhere to both
function get_max_upload_size(){
    $max_file_sizein_kb=get_site_option('fileupload_maxk');//it wil be empty for standard wordpress
    
    
    if(empty($max_file_sizein_kb)){//check for the server limit since we are on single wp
    
        $max_upload_size = (int)(ini_get('upload_max_filesize'));
        $max_post_size = (int)(ini_get('post_max_size'));
        $memory_limit = (int)(ini_get('memory_limit'));
        $max_file_sizein_mb= min($max_upload_size, $max_post_size, $memory_limit);
        $max_file_sizein_kb=$max_file_sizein_mb*1024;//convert mb to kb
}
return apply_filters('bppg_max_upload_size',$max_file_sizein_kb);



}
//inject css
function inject_css(){
    $image_url=  bppg_get_image();
    if(empty($image_url)||  apply_filters('bppg_iwilldo_it_myself',false))
        return;
    ?><style type="text/css">

body.is-user-profile{
background:url(<?php echo $image_url;?>)no-repeat top center fixed !important ;  
z-index: -2!important;
background-size: 100% ;
 
  
 
<?php


} 

//inject custom class for profile pages

function get_body_class($classes){
if(!bp_is_user ())
return $classes;
else
    $classes[]='is-user-profile';

return $classes;


}
//inject js if I am viewing my own profile
function inject_js(){
    if(bp_is_my_profile()&&  bp_is_profile_component()&&  bp_is_current_action('change-bg'))
        wp_enqueue_script ('bpbg-js',plugin_dir_url(__FILE__)."bppbg.js",array('jquery'));
}

//ajax delete the existing image

function ajax_delete_current_bg(){
    
    //validate nonce
    if(!wp_verify_nonce($_POST['_wpnonce'],"bp_upload_profile_bg"))
            die('what!');
    self::delete_bg_for_user();
     $message='<p>'.__('Background image deleted successfully!','bppg').'</p>';//feedback but we don't do anything with it yet, should we do something
     echo $message;
     exit(0);
              
}
//reuse it
function delete_bg_for_user(){
  //delete the associated image and send a message
    $old_file_path=get_user_meta(bp_loggedin_user_id(), 'profile_bg_file_path',true);
    if($old_file_path)
          @unlink ($old_file_path);//remove old files with each new upload
     delete_user_meta(bp_loggedin_user_id(),'profile_bg_file_path');
     delete_user_meta(bp_loggedin_user_id(),'profile_bg');  
}
}

/*public function for your use*/
/**
 *
 * @global type $bp
 * @param type $user_id
 * @return string  url of the image associated with current user or false
 */

function bppg_get_image($user_id=false){
    global $bp;
    if(!$user_id&&$bp->displayed_user->id)
            $user_id=$bp->displayed_user->id;
    
     if(empty($user_id))
         return false;
     $image_url=get_user_meta($user_id, 'profile_bg', true);
     return apply_filters('bppg_get_image',$image_url,$user_id);
}

$_profbg=new BPProfileBGChanger();

?>

//inject css 
function inject_css(){ 
    $image_url=  bppg_get_image(); 
    if(empty($image_url)||  apply_filters('bppg_iwilldo_it_myself',false)) 
        return; 
    ?><style type="text/css"> 

body.is-user-profile{ 
background:url(<?php echo $image_url;?>)no-repeat top center fixed !important ;   
z-index: -2!important; 
background-size: 100% ;

<?php 

function wp_full_bg() { 
?> 
   <!-- Change the src attribute of the img tag just below here to point to the image you want to use. --> 
   <img id="" src="" > 
    
   <script>window.jQuery || document.write('<script src="//ajax.googleapis.com/ajax/libs/jquery/1.5.1/jquery.min.js"><\x3C/script>')</script> 
   <script type="text/javascript" language="javascript"> 
     jQuery(function() { 
      fullbg(); 
 jQuery(window).resize(fullbg); 
 setTimeout(fullbg, 500); 
     }); 
     function fullbg() { 
       var imgw = jQuery('#wpfullbg').width(); 
       var imgh = jQuery('#wpfullbg').height(); 
       var vpw = jQuery(window).width(); 
       var vph = jQuery(window).height();  
        
       var imgratio = imgw / imgh; 
       var viewportratio = vpw / vph; 

       var w = vpw; 
       var h = vph; 
  
       if( viewportratio > imgratio ) 
       { 
         // screen is wider than picture -> increase the heigth of the picture; 
         h = w / imgratio;   
       }  
       else  
       { 
         w = h * imgratio; 
       } 

       jQuery('#wpfullbg').css( 
          {  
             'left': '0px', 
             'width': w, 
             'height': h, 
             'z-index': '-2', 
             'top' : '0px', 
             'position' : 'fixed', 
             'opacity' : '0.999999999' 
          } 
       );   
     }     
   </script> 
<?php 
} 
add_action( 'wp_footer', 'wp_full_bg' ); 
?>