BP Profile Header

<?php
/**
 * Plugin Name: BP Custom Header for User Profile
 * Version:1.0.1
 * Author: Brajesh Singh
 * Author URI: http://buddydev.com/members/sbrajesh/
 * Plugin URI: http://buddydev.com/plugins/bp-custom-header-for-user-profile/
 * License: GPL
 *
 * Description: Allows Users to upload custom header for their profile pages
 */

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

class BPProfileHChanger{

    //php4 constructor
function BPProfileBGChanger(){
        $this->__construct();
    }
 //php5 constructor
function __construct() {

      //load textdomain
      add_action ( 'bp_loaded', array(&$this,'load_textdomain'), 2 );
        //setup nav
      add_action( 'xprofile_setup_nav',array(&$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'));

}

//translation
function load_textdomain(){

    $locale = apply_filters( 'bp_custom_header_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_header_for_profile_load_textdomain_mofile', $mofile_default );

                if ( file_exists( $mofile ) ) {
                    // make sure file exists, and load it
			load_textdomain( "bpph", $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 Header', 'bpph' ), 'slug' => 'change-header', 'parent_url' => $profile_link, 'parent_slug' => $bp->profile->slug, 'screen_function' =>array(&$this,'screen_change_header'), 'position' => 40 ) );

}

//screen function


function screen_change_header(){
    global $bp;
    //if the form was submitted, update here
     if(!empty($_POST['bpprofbg_save_submit'])){
                if(!wp_verify_nonce($_POST['_wpnonce'],"bp_upload_profile_header"))
                         die(__('Security check failed','bppbh'));
                //handle the upload
               if( $this->handle_upload())
                  bp_core_add_message(__("Header uploaded successfully!","bpph"));

               if($_POST['bpph_keep_bh']=="no"){
                   //delete the associated image and send a message
                   $old_file_path=get_user_meta(bp_loggedin_user_id(), "profile_header_file_path",true);
                if($old_file_path)
                    @unlink ($old_file_path);//remove old files with each new upload
                delete_user_meta(bp_loggedin_user_id(),"profile_header_file_path");
                delete_user_meta(bp_loggedin_user_id(),"profile_header");
                bp_core_add_message(__("Header deleted successfully!","bpph"));
               }
}

    //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 Header","bppbh")."</h3>";
}
    //Upload page content
function page_content(){

	    ?>
    <form name="bpprofbph_change" method="post" class="standard-form" enctype="multipart/form-data">
        <label for="bpph_keep_header">
            <input type="radio" name="bpph_keep_header" id="bpph_keep_header" checked="checked" value="yes"><?php _e("Keep Header","bpph");?>


        </label>
        <label for="bpph_delete_bh">
            <input type="radio" name="bpph_keep_header" id="bpph_delete_header" value="no"><?php _e("Delete Header","bpph");?>
        </label>

        <p><?php _e("If you want to change your profile header, please upload a new image.","bpph");?></p>
        <label for="bprpgbh_upload">
		<input type="file" name="file" id="bprpgbh_upload"  class="settings-input" />
	</label>

	<?php wp_nonce_field("bp_upload_profile_header");?>
        <input type="hidden" name="action" id="action" value="bp_upload_profile_header" />
	 <p class="submit"><input type="submit" id="bpprofbh_save_submit" name="bpprofbh_save_submit" class="button" value="<?php _e('Save','bppbh') ?>" /></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
        $old_file_path=get_user_meta(bp_loggedin_user_id(), "profile_header_file_path",true);
	if($old_file_path)
            @unlink ($old_file_path);//remove old files with each new upload

            //save in usermeta
        update_user_meta(bp_loggedin_user_id(),"profile_header",$uploaded_file['url']);
        update_user_meta(bp_loggedin_user_id(),"profile_header_file_path",$uploaded_file['file']);

	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('bpph_max_upload_size',$max_file_sizein_kb);



}
//inject css
function inject_css(){
    $image_url=  bpph_get_image();
    if(empty($image_url)||  apply_filters("bpph_iwilldo_it_myself",false))
        return;
    ?>
<style type="text/css">
body.is-user-profile{
background:url(<?php echo $image_url;?>);
}
</style>
<?php

}

//inject custom class for profile pages

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

return $classes;


}

}

/*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 bpph_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_header", true);
     return apply_filters("bpph_get_image",$image_url,$user_id);
}

$_profbh=new BPProfileHChanger();

?>