displaying BuddyPress user's home page link if he's connected into a WordPress post, page or text widget

bp_loggedin_user_shortcode.php

<?php
/*** displaying BuddyPress user's home page link if he's connected into a WordPress post, page or text widget ***/


/*********

Beginning of the code to paste in the functions.php of your active theme

**********/

/* registering a shortcode is the easiest way i think */
add_shortcode('turenne','turenne_handle_shortcode');

function turenne_handle_shortcode( $atts ){
	global $bp;
	
	/* to display a user's home link, user needs to be connected ! */
	if( !is_user_logged_in() )
		return false;
		
	$user_id = $bp->loggedin_user->id;
	$output = '<div class="turenne" style="display:inline-block">';
	
	$display_name = bp_core_get_user_displayname( $user_id );
	$home_user_url = bp_core_get_user_domain( $user_id );
		
	extract( shortcode_atts( array(
		                            'avatar' => true, 
					    'size' => 50, 
					    'alias' => ''
				      ), $atts));
	
	/* if no alias, then name of the user */
	if( empty( $alias ) )
		$alias = $display_name;
		
	$output .= 	'<a href="'. $home_user_url .'" title="'. $alias .'">';
	
	if( !empty( $avatar ) ) {
		$output .= bp_core_fetch_avatar( array( 'item_id' => $user_id, 'object' => 'user', 'type' => 'full', 'width' => $size.'px', 'height' => $size.'px' ) );
	}
	
	$output .= '<span style="margin-left:5px;line-height:'.$size.'px">' . $alias . '</span></a><br style="clear:both"/></div>';
	
	
	return apply_filters( 'turenne_handle_shortcode', $output, $atts );
}


/*********

End of the code to paste in the functions.php of your active theme

**********/


/*** now you can use this kind of shortcode in your posts, pages or text widgets

[turenne avatar="1" alias="affichez votre profil"]

to allow shortcodes in text widgets, please visit :
http://codex.wordpress.org/Function_Reference/do_shortcode

***/
?>