function jetpack_og_get_image($width = 200, $height = 200, $max_images = 4)
{
// Facebook requires thumbnails to be a minimum of 200x200
$image = '';
if (is_singular() && !is_home()) {
global $post;
$image = '';
// Grab obvious image if $post is an attachment page for an image
if (is_attachment($post->ID) && 'image' == substr($post->post_mime_type, 0, 5)) {
$image = wp_get_attachment_url($post->ID);
}
// Attempt to find something good for this post using our generalized PostImages code
if (!$image && class_exists('Jetpack_PostImages')) {
$post_images = Jetpack_PostImages::get_images($post->ID, array('width' => $width, 'height' => $height));
if ($post_images && !is_wp_error($post_images)) {
$image = array();
foreach ((array) $post_images as $post_image) {
$image['src'] = $post_image['src'];
if (isset($post_image['src_width'], $post_image['src_height'])) {
$image['width'] = $post_image['src_width'];
$image['height'] = $post_image['src_height'];
}
}
}
}
} else {
if (is_author()) {
$author = get_queried_object();
if (function_exists('get_avatar_url')) {
// Prefer the core function get_avatar_url() if available, WP 4.2+
$image['src'] = get_avatar_url($author->user_email, array('size' => $width));
} else {
$has_filter = has_filter('pre_option_show_avatars', '__return_true');
if (!$has_filter) {
add_filter('pre_option_show_avatars', '__return_true');
}
$avatar = get_avatar($author->user_email, $width);
if (!$has_filter) {
remove_filter('pre_option_show_avatars', '__return_true');
}
if (!empty($avatar) && !is_wp_error($avatar)) {
if (preg_match('/src=["\']([^"\']+)["\']/', $avatar, $matches)) {
}
$image['src'] = wp_specialchars_decode($matches[1], ENT_QUOTES);
}
}
}
}
if (empty($image)) {
$image = array();
} else {
if (!is_array($image)) {
$image = array('src' => $image);
}
}
// First fall back, blavatar
if (empty($image) && function_exists('blavatar_domain')) {
$blavatar_domain = blavatar_domain(site_url());
if (blavatar_exists($blavatar_domain)) {
$image['src'] = blavatar_url($blavatar_domain, 'img', $width, false, true);
$image['width'] = $width;
$image['height'] = $height;
}
}
// Second fall back, Site Logo
if (empty($image) && (function_exists('jetpack_has_site_logo') && jetpack_has_site_logo())) {
$image['src'] = jetpack_get_site_logo('url');
$image_dimensions = jetpack_get_site_logo_dimensions();
if (!empty($image_dimensions)) {
$image['width'] = $image_dimensions['width'];
$image['height'] = $image_dimensions['height'];
}
}
// Third fall back, Site Icon
if (empty($image) && (function_exists('jetpack_has_site_icon') && jetpack_has_site_icon())) {
$image['src'] = jetpack_site_icon_url(null, '512');
$image['width'] = '512';
$image['height'] = '512';
}
// Fourth fall back, Core Site Icon. Added in WP 4.3.
if (empty($image) && (function_exists('has_site_icon') && has_site_icon())) {
$image['src'] = get_site_icon_url(null, '512');
}
// Finally fall back, blank image
if (empty($image)) {
/**
* Filter the default Open Graph Image tag, used when no Image can be found in a post.
*
* @since 3.0.0
*
* @param string $str Default Image URL.
*/
$image['src'] = apply_filters('jetpack_open_graph_image_default', 'https://s0.wp.com/i/blank.jpg');
}
return $image;
}
static function twitter_cards_define_type_based_on_image_count($og_tags, $extract)
{
$card_type = 'summary';
$img_count = $extract['count']['image'];
if (empty($img_count)) {
// No images, use Blavatar as a thumbnail for the summary type.
if (function_exists('blavatar_domain')) {
$blavatar_domain = blavatar_domain(site_url());
if (blavatar_exists($blavatar_domain)) {
$og_tags['twitter:image'] = blavatar_url($blavatar_domain, 'img', 240);
}
}
// Second fall back, Site Logo
if (empty($og_tags['twitter:image']) && (function_exists('jetpack_has_site_logo') && jetpack_has_site_logo())) {
$og_tags['twitter:image'] = jetpack_get_site_logo('url');
}
// Third fall back, Site Icon
if (empty($og_tags['twitter:image']) && (function_exists('jetpack_has_site_icon') && jetpack_has_site_icon())) {
$og_tags['twitter:image'] = jetpack_site_icon_url(null, '240');
}
// Not falling back on Gravatar, because there's no way to know if we end up with an auto-generated one.
} elseif (1 == $img_count && ('image' == $extract['type'] || 'gallery' == $extract['type'])) {
// 1 image = photo
// Test for $extract['type'] to limit to image and gallery, so we don't send a potential fallback image like a Gravatar as a photo post.
$card_type = 'photo';
$og_tags['twitter:image'] = add_query_arg('w', 1400, empty($extract['images']) ? $extract['image'] : $extract['images'][0]['url']);
} elseif ($img_count <= 3) {
// 2-3 images = summary with small thumbnail
$og_tags['twitter:image'] = add_query_arg('w', 240, empty($extract['images']) ? $extract['image'] : $extract['images'][0]['url']);
} elseif ($img_count >= 4) {
// >= 4 images = gallery
$card_type = 'gallery';
$og_tags = self::twitter_cards_gallery($extract, $og_tags);
}
return array($og_tags, $card_type);
}
/**
* Select a file admin view
*/
public static function select_page()
{
// Display the site_icon form to upload the image
?>
<form action="<?php
echo esc_url(admin_url('options-general.php?page=jetpack-site_icon-upload'));
?>
" method="post" enctype="multipart/form-data">
<h2 class="site-icon-title">
<?php
if (jetpack_has_site_icon()) {
esc_html_e('Update Site Icon', 'jetpack');
} else {
esc_html_e('Add Site Icon', 'jetpack');
}
?>
<span class="small"><?php
esc_html_e('select a file', 'jetpack');
?>
</span></h2>
<p><?php
esc_html_e('Upload a image that you want to use as your site icon. You will be asked to crop it in the next step.', 'jetpack');
?>
</p>
<p><input name="site-iconfile" id="site-iconfile" type="file" /></p>
<p><?php
esc_html_e('The image needs to be at least', 'jetpack');
?>
<strong><?php
echo self::$min_size;
?>
px</strong> <?php
esc_html_e('in both width and height.', 'jetpack');
?>
</p>
<p class="submit site-icon-submit-form">
<input name="submit" value="<?php
esc_attr_e('Upload Image', 'jetpack');
?>
" type="submit" class="button button-primary button-large" /><?php
printf(__(' or <a href="%s">Cancel</a> and go back to the settings.', 'jetpack'), esc_url(admin_url('options-general.php')));
?>
<input name="step" value="2" type="hidden" />
<?php
wp_nonce_field('update-site_icon-2', '_nonce');
?>
</p>
</form>
<?php
}
/**
* @param int $post_id The post ID to check
* @param int $size
* @return Array containing details of the image, or empty array if none.
*/
static function from_blavatar($post_id, $size = 96)
{
$permalink = get_permalink($post_id);
if (function_exists('blavatar_domain') && function_exists('blavatar_exists') && function_exists('blavatar_url')) {
$domain = blavatar_domain($permalink);
if (!blavatar_exists($domain)) {
return array();
}
$url = blavatar_url($domain, 'img', $size);
} elseif (function_exists('jetpack_has_site_icon') && jetpack_has_site_icon()) {
$url = jetpack_site_icon_url(null, $size, $default = false);
} else {
return array();
}
return array(array('type' => 'image', 'from' => 'blavatar', 'src' => $url, 'src_width' => $size, 'src_height' => $size, 'href' => $permalink));
}
function jetpack_og_get_image($width = 200, $height = 200, $max_images = 4)
{
// Facebook requires thumbnails to be a minimum of 200x200
$image = '';
if (is_singular() && !is_home()) {
global $post;
$image = '';
// Attempt to find something good for this post using our generalized PostImages code
if (class_exists('Jetpack_PostImages')) {
$post_images = Jetpack_PostImages::get_images($post->ID, array('width' => $width, 'height' => $height));
if ($post_images && !is_wp_error($post_images)) {
$image = array();
foreach ((array) $post_images as $post_image) {
$image[] = $post_image['src'];
}
}
}
} else {
if (is_author()) {
$author = get_queried_object();
if (function_exists('get_avatar_url')) {
// Prefer the core function get_avatar_url() if available, WP 4.2+
$image = get_avatar_url($author->user_email, array('size' => $width));
} else {
$has_filter = has_filter('pre_option_show_avatars', '__return_true');
if (!$has_filter) {
add_filter('pre_option_show_avatars', '__return_true');
}
$avatar = get_avatar($author->user_email, $width);
if (!$has_filter) {
remove_filter('pre_option_show_avatars', '__return_true');
}
if (!empty($avatar) && !is_wp_error($avatar)) {
if (preg_match('/src=["\']([^"\']+)["\']/', $avatar, $matches)) {
}
$image = wp_specialchars_decode($matches[1], ENT_QUOTES);
}
}
}
}
if (empty($image)) {
$image = array();
} else {
if (!is_array($image)) {
$image = array($image);
}
}
// First fall back, blavatar
if (empty($image) && function_exists('blavatar_domain')) {
$blavatar_domain = blavatar_domain(site_url());
if (blavatar_exists($blavatar_domain)) {
$image[] = blavatar_url($blavatar_domain, 'img', $width);
}
}
// Second fall back, Site Logo
if (empty($image) && (function_exists('jetpack_has_site_logo') && jetpack_has_site_logo())) {
$image[] = jetpack_get_site_logo('url');
}
// Third fall back, Site Icon
if (empty($image) && (function_exists('jetpack_has_site_icon') && jetpack_has_site_icon())) {
$image[] = jetpack_site_icon_url(null, '512');
}
// Fourth fall back, blank image
if (empty($image)) {
$image[] = apply_filters('jetpack_open_graph_image_default', 'https://s0.wp.com/i/blank.jpg');
}
return $image;
}