* @copyright Copyright 2008 Edward Dale
* @license http://www.gnu.org/licenses/gpl.txt GPL 2.0
* @version $Id$
* @link http://www.scompt.com/projects/immerstat
* @since 0.5
*/
class ImmerStat {
// Whether to regenerate stats
var $do_load = False;
/**
* Make sure we've got all we need to run and the run.
*/
function ImmerStat() {
add_settings_section('immerstat_setting_section', 'ImmerStat',
array(&$this, 'settings_section'), 'misc');
add_settings_field('immerstat_days', 'Number of Days',
array(&$this, 'settings_field'),
'misc', 'immerstat_setting_section');
register_setting('misc', 'immerstat_days');
add_option('immerstat_days', 30);
if( function_exists('stats_get_csv') && current_user_can( 'manage_options' ) ) {
$this->load();
}
}
/**
* There's not much to say at the top of the ImmerStats section.
*/
function settings_section() {
// NOOP
}
/**
* Shows the input field for the number of days.
*/
function settings_field() {
$days = get_option('immerstat_days');
echo "";
}
/**
* A filter hook used to pick up on whether new stats were downloaded.
*/
function enable_load($ret) {
$this->do_load = True;
return $ret;
}
/**
* Gets the view count from the WordPress.com Stats plugin and saves it
* in a form that we can use later in the footer.
*/
function load() {
$num_days = get_option('immerstat_days');
$old_data = get_option('immerstat_data');
// Use this filter to determine when new stats were actually retrieved
add_filter('update_option_stats_cache', array(&$this, 'enable_load'));
$from_wp = stats_get_csv('views', array( 'days'=>$num_days,
'limit'=>$num_days,
'summarize'=>false));
remove_filter('update_option_stats_cache', array(&$this, 'enable_load'));
$data = array();
$max = $min = $from_wp[0]['views'];
if( $this->do_load || (isset($old_data['days']) &&
$old_data['days'] != $num_days) ) {
foreach( $from_wp as $day ) {
if( $max<$day['views'] ) $max=$day['views'];
if( $min>$day['views'] ) $min=$day['views'];
$data []= $day['views'];
}
$stats = array('data'=>implode($data, ','), 'min'=>$min,
'max'=>$max, 'days'=>$num_days,
'current'=>$data[count($data)-1]);
update_option('immerstat_data', $stats);
}
// This filter gets called at a convenient place in the header
add_filter('favorite_actions', array(&$this, 'show_graph'));
}
/**
* Figure out which colors to use, build the Google Charts API URL,
* and echo it all out.
*/
function show_graph($ret) {
global $_wp_admin_css_colors;
// Figure out a good color scheme to use.
$scheme_name = get_user_option('admin_color');
if ( empty($scheme_name) || !isset($_wp_admin_css_colors[$scheme_name]) ) {
if( $scheme_name == 'fresh' ) {
$colors = array('bg'=>'E4F2FD', 'under'=>'2583AD', 'line'=>'D54E21');
} else { // if( $scheme_name == 'classic' ) {
$colors = array('bg'=>'14568A', 'under'=>'CFEBF6', 'line'=>'D54E21');
}
} else {
$colors = array('bg'=>'FF0000', 'under'=>'00FF00', 'line'=>'0000FF');
$scheme = $_wp_admin_css_colors[$scheme_name];
if( count($scheme->colors)>3 ) {
$colors['bg'] = substr($scheme->colors[0],1);
$colors['under'] = substr($scheme->colors[1],1);
$colors['line'] = substr($scheme->colors[2],1);
}
}
$colors = apply_filters('immerstat_colors', $colors);
$stats = get_option('immerstat_data');
if( $stats['max']==$stats['min']) {
$current_ratio=0;
} else {
$current_ratio = (float)(($stats['current']-$stats['min'])/($stats['max']-$stats['min']));
}
$width = $stats['days']*4;
$link_args = array('chm' => "h,{$colors['line']},0,$current_ratio,0.5|B,{$colors['under']},0,0,0",
'chco' => $colors['line'],
'chf' => "bg,s,{$colors['bg']}",
'chs' => "{$width}x60",
'cht' => 'ls',
'chd' => "t:{$stats['data']}",
'chds' => "{$stats['min']},{$stats['max']}" );
$link_args = apply_filters('immerstat_img_link_args', $link_args);
$link = add_query_arg($link_args, 'http://chart.apis.google.com/chart?');
?>