/**
* Front-end display of widget.
*
* @since 1.0
*
* @see WP_Widget::widget()
*
* @param array $args Widget arguments.
* @param array $instance Saved values from database.
* @return void
*/
public function widget($args, $instance)
{
// no follow target. fail early
if (empty($instance['href'])) {
return;
}
extract($args);
if (!isset($instance['ref'])) {
$instance['ref'] = 'widget';
}
if (!function_exists('facebook_get_follow_button')) {
require_once dirname(dirname(__FILE__)) . '/social-plugins.php';
}
$follow_button_html = facebook_get_follow_button($instance);
if (!(is_string($follow_button_html) && $follow_button_html)) {
return;
}
echo $before_widget;
$title = apply_filters('widget_title', empty($instance['title']) ? '' : $instance['title'], $instance, $this->id_base);
if ($title) {
echo $before_title . $title . $after_title;
}
echo $follow_button_html;
echo $after_widget;
}
/**
* Generate a HTML div element with data-* attributes to be converted into a Follow Button by the Facebook JavaScript SDK
* The passed href URL value must be a Facebook User profile URL; this URL is not validated before attempting to use in a Follow Button parameter
*
* @since 1.5
*
* @param array $attributes shortcode attributes. overrides site options for specific button attributes
* @param string $content shortcode content. no effect
* @return string Follow Button div HTML or empty string if minimum requirements not met
*/
public static function follow_button($attributes, $content = null)
{
$site_options = get_option('facebook_follow_button');
if (!is_array($site_options)) {
$site_options = array();
}
$options = shortcode_atts(array('href' => '', 'layout' => isset($site_options['layout']) ? $site_options['layout'] : '', 'show_faces' => isset($site_options['show_faces']) && $site_options['show_faces'], 'width' => isset($site_options['width']) ? $site_options['width'] : 0, 'font' => isset($site_options['font']) ? $site_options['font'] : '', 'colorscheme' => isset($site_options['colorscheme']) ? $site_options['colorscheme'] : '', 'ref' => 'shortcode'), $attributes, 'facebook_follow_button');
// Facebook User profile URL required as the target of the follow
if (is_string($options['href']) && $options['href']) {
$options['href'] = esc_url_raw(trim($options['href']), array('http', 'https'));
} else {
return '';
}
$options['show_faces'] = (bool) $options['show_faces'];
$options['width'] = absint($options['width']);
if (!$options['width']) {
unset($options['width']);
}
foreach (array('layout', 'font', 'colorscheme') as $key) {
$options[$key] = trim($options[$key]);
if (!$options[$key]) {
unset($options[$key]);
}
}
if (!function_exists('facebook_get_follow_button')) {
require_once dirname(__FILE__) . '/social-plugins.php';
}
return facebook_get_follow_button($options);
}
/**
* Add Follow Button(s) to post content
*
* Adds a follow button above the post, below the post, or both above and below the post depending on stored preferences.
*
* @since 1.1
*
* @param string $content existing content
* @return string passed content with Follow Button markup prepended, appended, or both.
*/
function facebook_the_content_follow_button($content)
{
// Follow Button should not be the only content
if (!$content) {
return $content;
}
$options = get_option('facebook_follow_button');
if (!is_array($options)) {
$options = array();
}
if (!class_exists('Facebook_User')) {
require_once dirname(dirname(__FILE__)) . '/facebook-user.php';
}
$facebook_user = Facebook_User::get_user_meta(get_the_author_meta('ID'), 'fb_data', true);
if (!($facebook_user && isset($facebook_user['fb_uid']))) {
return $content;
}
$options['href'] = Facebook_User::facebook_profile_link($facebook_user);
if (!$options['href']) {
return $content;
}
if ($options['position'] === 'top') {
$options['ref'] = 'above-post';
return facebook_get_follow_button($options) . $content;
} else {
if ($options['position'] === 'bottom') {
$options['ref'] = 'below-post';
return $content . facebook_get_follow_button($options);
} else {
if ($options['position'] === 'both') {
$options['ref'] = 'above-post';
$above = facebook_get_follow_button($options);
$options['ref'] = 'below-post';
return $above . $content . facebook_get_follow_button($options);
}
}
}
// don't break the filter
return $content;
}
/**
* Add Follow Button(s) to post content
* Adds a follow button above the post, below the post, or both above and below the post depending on stored preferences.
*
* @since 1.1
* @param string $content existing content
* @return string passed content with Follow Button markup prepended, appended, or both.
*/
function facebook_the_content_follow_button($content)
{
global $post;
// Send Button should not be the only content
if (!$content) {
return $content;
}
$options = get_option('facebook_follow_button');
if (!is_array($options)) {
$options = array();
}
if (!class_exists('Facebook_User')) {
require_once dirname(dirname(__FILE__)) . '/facebook-user.php';
}
$facebook_user = Facebook_User::get_user_meta(get_the_author_meta('ID'), 'fb_data', true);
if (!($facebook_user && isset($facebook_user['fb_uid']))) {
return $content;
}
if (isset($facebook_user['username'])) {
$options['href'] = 'https://www.facebook.com/' . $facebook_user['username'];
} else {
$options['href'] = 'https://www.facebook.com/profile.php?' . http_build_query(array('id' => $facebook_user['fb_uid']));
}
if ($options['position'] === 'top') {
$options['ref'] = 'above-post';
return facebook_get_follow_button($options) . $content;
} else {
if ($options['position'] === 'bottom') {
$options['ref'] = 'below-post';
return $content . facebook_get_follow_button($options);
} else {
if ($options['position'] === 'both') {
$options['ref'] = 'above-post';
$above = facebook_get_follow_button($options);
$options['ref'] = 'below-post';
return $above . $content . facebook_get_follow_button($options);
}
}
}
// don't break the filter
return $content;
}
