sfc-like.php

<?php
global $sfc_like_defaults;
$sfc_like_defaults = array(
		'id'=>0,
		'layout'=>'standard', 		// standard or button_count
		'showfaces'=>'true', 		// true or false
		'width'=>'450',
		'height'=>'65',
		'send' => 'false',		// true or false
		'action'=>'like',		// like or recommend
		'colorscheme'=>'light',		// light or dark
		'font' => 'lucida+grande',	// arial, lucida+grande, seqoe+ui, tahoma, trebuchet+ms, or verdana
		);

function get_sfc_like_button($args='') {
	global $sfc_like_defaults;
	
	$options = get_option('sfc_options');
	if (!empty($options['like_layout'])) $sfc_like_defaults['layout']=$options['like_layout'];
	if (!empty($options['like_action'])) $sfc_like_defaults['action']=$options['like_action'];
	if (!empty($options['like_send'])) $sfc_like_defaults['send']=$options['like_send'];

	$args = wp_parse_args($args, $sfc_like_defaults);
	extract($args);

	if (empty($url)) $url = get_permalink($id);

	return "<fb:like href='{$url}' send='{$send}' layout='{$layout}' show_faces='{$showfaces}' width='{$width}' height='{$height}' action='{$action}' colorscheme='{$colorscheme}' font='{$font}'></fb:like>";
}

function sfc_like_button($args='') {
	echo get_sfc_like_button($args);
}

function sfc_like_shortcode($atts) {
	global $sfc_like_defaults;

	$options = get_option('sfc_options');
	if (!empty($options['like_layout'])) $sfc_like_defaults['layout']=$options['like_layout'];
	if (!empty($options['like_action'])) $sfc_like_defaults['action']=$options['like_action'];
	if (!empty($options['like_send'])) $sfc_like_defaults['send']=$options['like_send'];
	
	$args = shortcode_atts($sfc_like_defaults, $atts);

	return get_sfc_like_button($args);
}
add_shortcode('fb-like', 'sfc_like_shortcode');

function sfc_like_button_automatic($content) {
	global $post;
	$post_types = apply_filters('sfc_like_post_types', get_post_types( array('public' => true) ) );
	if ( !in_array($post->post_type, $post_types) ) return $content;
	
	// exclude bbPress post types 
	if ( function_exists('bbp_is_custom_post_type') && bbp_is_custom_post_type() ) return $content;
	
	$options = get_option('sfc_options');

	$args = array(
		'layout'=>$options['like_layout'],
		'action'=>$options['like_action'],
		'send'=>$options['like_send'],
	);

	$button = get_sfc_like_button($args);
	switch ($options['like_position']) {
		case "before":
			$content = $button . $content;
			break;
		case "after":
			$content = $content . $button;
			break;
		case "both":
			$content = $button . $content . $button;
			break;
		case "manual":
		default:
			break;
	}
	return $content;
}
add_filter('the_content', 'sfc_like_button_automatic', 30);

// add the admin sections to the sfc page
add_action('admin_init', 'sfc_like_admin_init');
function sfc_like_admin_init() {
	add_settings_section('sfc_like', __('Like Button Settings', 'sfc'), 'sfc_like_section_callback', 'sfc');
	add_settings_field('sfc_like_position', __('Like Button Position', 'sfc'), 'sfc_like_position', 'sfc', 'sfc_like');
	add_settings_field('sfc_like_layout', __('Like Button Layout', 'sfc'), 'sfc_like_layout', 'sfc', 'sfc_like');
	add_settings_field('sfc_like_action', __('Like Button Action', 'sfc'), 'sfc_like_action', 'sfc', 'sfc_like');
	add_settings_field('sfc_like_send', __('Send Button', 'sfc'), 'sfc_like_send', 'sfc', 'sfc_like');
}

function sfc_like_section_callback() {
	echo '<p>'.__('Choose where you want the like button added to your content.', 'sfc').'</p>';
}

function sfc_like_position() {
	$options = get_option('sfc_options');
	if (!isset($options['like_position'])) $options['like_position'] = 'manual';
	?>
	<ul>
	<li><label><input type="radio" name="sfc_options[like_position]" value="before" <?php checked('before', $options['like_position']); ?> /> <?php _e('Before the content of your post', 'sfc'); ?></label></li>
	<li><label><input type="radio" name="sfc_options[like_position]" value="after" <?php checked('after', $options['like_position']); ?> /> <?php _e('After the content of your post', 'sfc'); ?></label></li>
	<li><label><input type="radio" name="sfc_options[like_position]" value="both" <?php checked('both', $options['like_position']); ?> /> <?php _e('Before AND After the content of your post', 'sfc'); ?></label></li>
	<li><label><input type="radio" name="sfc_options[like_position]" value="manual" <?php checked('manual', $options['like_position']); ?> /> <?php _e('Manually add the button to your theme or posts (use the sfc_like_button() function in your theme)', 'sfc'); ?></label></li>
	</ul>
<?php
}

function sfc_like_layout() {
	$options = get_option('sfc_options');
	if (!isset($options['like_layout'])) $options['like_layout'] = 'standard';
	?>
	<ul>
	<li><label><input type="radio" name="sfc_options[like_layout]" value="standard" <?php checked('standard', $options['like_layout']); ?> /> <?php _e('Standard', 'sfc'); ?></label></li>
	<li><label><input type="radio" name="sfc_options[like_layout]" value="button_count" <?php checked('button_count', $options['like_layout']); ?> /> <?php _e('Button with counter', 'sfc'); ?></label></li>
	<li><label><input type="radio" name="sfc_options[like_layout]" value="box_count" <?php checked('box_count', $options['like_layout']); ?> /> <?php _e('Box with counter', 'sfc'); ?></label></li>
	</ul>
<?php
}

function sfc_like_action() {
	$options = get_option('sfc_options');
	if (!isset($options['like_action'])) $options['like_action'] = 'like';
	?>
	<ul>
	<li><label><input type="radio" name="sfc_options[like_action]" value="like" <?php checked('like', $options['like_action']); ?> /> <?php _e('Like', 'sfc'); ?></label></li>
	<li><label><input type="radio" name="sfc_options[like_action]" value="recommend" <?php checked('recommend', $options['like_action']); ?> /> <?php _e('Recommend', 'sfc'); ?></label></li>
	</ul>
<?php
}

function sfc_like_send() {
	$options = get_option('sfc_options');
	if (!isset($options['like_send'])) $options['like_send'] = 'false';
	?>
	<ul>
	<li><label><input type="radio" name="sfc_options[like_send]" value="true" <?php checked('true', $options['like_send']); ?> /> <?php _e('Enabled', 'sfc'); ?></label></li>
	<li><label><input type="radio" name="sfc_options[like_send]" value="false" <?php checked('false', $options['like_send']); ?> /> <?php _e('Disabled', 'sfc'); ?></label></li>
	</ul>
<?php 
}

add_filter('sfc_validate_options','sfc_like_validate_options');
function sfc_like_validate_options($input) {
	if (!in_array($input['like_position'], array('before', 'after', 'both', 'manual'))) {
			$input['like_position'] = 'manual';
	}
	return $input;
}

class SFC_Like_Widget extends WP_Widget {
	function SFC_Like_Widget() {
		$widget_ops = array('classname' => 'widget_sfc-like', 'description' => __('Facebook Like Button', 'sfc'));
		$this->WP_Widget('sfc-like', __('Facebook Like Button (SFC)', 'sfc'), $widget_ops);
	}

	function widget($args, $instance) {
		extract( $args );
		$title = apply_filters('widget_title', $instance['title']);
		$url = $instance['url'];
		$width = intval($instance['width']);
		?>
		<?php echo $before_widget; ?>
		<?php if ( $title ) echo $before_title . $title . $after_title; ?>
		<?php sfc_like_button(array(
			'url'=>$url,
			'layout'=>'standard', 		// standard or button_count
			'showfaces'=>'false', 		// true or false
			'width'=>$width,
			) ); 
		?>
		<?php echo $after_widget; ?>
		<?php
	}

	function update($new_instance, $old_instance) {
		return $new_instance;
	}

	function form($instance) {
		$title = esc_attr($instance['title']);
		$url = esc_url($instance['url']);
		if (empty($instance['width'])) $instance['width'] = 250;
		$width = intval($instance['width']);
		?>
<p><label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title:'); ?>
<input class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" type="text" value="<?php echo $title; ?>" />
</label></p>
<p><label for="<?php echo $this->get_field_id('url'); ?>"><?php _e('URL:'); ?>
<input class="widefat" id="<?php echo $this->get_field_id('url'); ?>" name="<?php echo $this->get_field_name('url'); ?>" type="text" value="<?php echo $url; ?>" />
</label></p>
<p>(PROTIP: Use the URL of your Facebook Page or App to make a like button for that Page)</p>
<p><label for="<?php echo $this->get_field_id('width'); ?>"><?php _e('Width (pixels):'); ?>
<input class="widefat" id="<?php echo $this->get_field_id('width'); ?>" name="<?php echo $this->get_field_name('width'); ?>" type="text" value="<?php echo $width; ?>" />
</label></p>
		<?php
	}
}
add_action('widgets_init', create_function('', 'return register_widget("SFC_Like_Widget");'));