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Improve OpenGraph and Twitter Card support.
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By supporting OpenGraph Webcomic already mostly supported Twitter Card.
This commit includes various improvements that ensure both function
optimally.
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Michael Sisk committed Jan 30, 2013
1 parent de8062e commit 5d7e004
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Showing 2 changed files with 41 additions and 16 deletions.
2 changes: 1 addition & 1 deletion readme.md
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Expand Up @@ -8,7 +8,7 @@ Webcomic is a plugin for [WordPress](//wordpress.org) that provides a host of fe

[_**Everything!**_](//github.com/mgsisk/webcomic/wiki) Webcomic has been rebuilt to provide you with leaner, meaner webcomic management. Highlights include:

- [OpenGraph](//ogp.me) support for any Webcomic-related page.
- [OpenGraph](//ogp.me) and [Twitter Card](//dev.twitter.com/docs/cards) support for any Webcomic-related page.
- [Twitter](//twitter.com) integration for automatically tweeting new webcomics.
- [File management](//github.com/mgsisk/webcomic/wiki/Media) handled through the WordPress Media Library.
- Each [collection](//github.com/mgsisk/webcomic/wiki/Webcomic-Collections) is now a custom post type with unique [storyline](//github.com/mgsisk/webcomic/wiki/Storylines) and [character](//github.com/mgsisk/webcomic/wiki/Characters) taxonomies.
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55 changes: 40 additions & 15 deletions webcomic.php
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Original file line number Diff line number Diff line change
Expand Up @@ -472,25 +472,30 @@ public function log_ipn() {
public function wp_head() {
global $wp_query, $post;

$output = array();
$object = $wp_query->get_queried_object();
$output = array();

if ( self::$collection and !is_404() ) {
$output[ 'og:type' ] = empty( $object->post_type ) ? 'website' : 'article';
$output[ 'og:site_name' ] = get_bloginfo( 'name' );
$output[ 'og:type' ] = empty( $object->post_type ) ? 'website' : 'article';
$output[ 'twitter:card' ] = is_singular() ? 'photo' : 'summary';
$output[ 'og:site_name' ] = get_bloginfo( 'name' );
$output[ 'og:description' ] = get_bloginfo( 'description' );

if ( is_singular() ) {
setup_postdata( $post );

$output[ 'og:url' ] = get_permalink();
$output[ 'og:title' ] = esc_attr( get_the_title() );
$output[ 'og:description' ] = esc_attr( strip_tags( wp_trim_excerpt( get_the_excerpt() ) ) );
$output[ 'article:author' ] = esc_url( get_author_posts_url( $object->post_author ) );
$output[ 'article:published_time' ] = get_the_time( 'c' );
$output[ 'article:modified_time' ] = get_the_modified_time( 'c' );
$output[ 'article:section' ] = esc_attr( self::$config[ 'collections' ][ self::$collection ][ 'name' ] );
$output[ 'article:tag' ] = array();

if ( $description = esc_attr( strip_tags( wp_trim_excerpt( get_the_excerpt() ) ) ) ) {
$output[ 'og:description' ] = $description;
}

if ( isset( self::$config[ 'collections' ][ $object->post_type ] ) ) {
foreach ( array_merge( ( array ) get_the_terms( $object->ID, "{$object->post_type}_storyline" ), ( array ) get_the_terms( $object->ID, "{$object->post_type}_character" ) ) as $term ) {
if ( isset( $term->name ) ) {
Expand All @@ -501,38 +506,58 @@ public function wp_head() {
} elseif ( is_tax() ) {
$output[ 'og:url' ] = get_term_link( ( integer ) $object->term_id, $object->taxonomy );
$output[ 'og:title' ] = esc_attr( single_term_title( '', false ) );
$output[ 'og:description' ] = esc_attr( strip_tags( term_description( $object->term_id, $object->taxonomy ) ) );

if ( $description = esc_attr( strip_tags( term_description( $object->term_id, $object->taxonomy ) ) ) ) {
$output[ 'og:description' ] = $description;
}
} else {
$output[ 'og:url' ] = get_post_type_archive_link( $object->name );
$output[ 'og:title' ] = esc_attr( self::$config[ 'collections' ][ $object->name ][ 'name' ] );
$output[ 'og:description' ] = esc_attr( strip_tags( self::$config[ 'collections' ][ $object->name ][ 'description' ] ) );

if ( $description = esc_attr( strip_tags( self::$config[ 'collections' ][ $object->name ][ 'description' ] ) ) ) {
$output[ 'og:description' ] = $description;
}
}

if ( is_singular() and isset( self::$config[ 'collections' ][ $object->post_type ] ) and $attachments = self::get_attachments( $object->ID ) ) {
$output[ 'og:image' ] = array();

foreach ( $attachments as $attachment ) {
$attributes = wp_get_attachment_image_src( $attachment->ID );
$output[ 'og:image' ][] = $attributes[ 0 ];
$attributes = wp_get_attachment_image_src( $attachment->ID, 'full' );
$output[ 'og:image' ][] = array(
$attributes[ 0 ],
':width' => $attributes[ 1 ],
':height' => $attributes[ 2 ]
);
}
} elseif ( is_tax() and isset( self::$config[ 'terms' ][ $object->term_id ][ 'image' ] ) ) {
$attributes = wp_get_attachment_image_src( self::$config[ 'terms' ][ $object->term_id ][ 'image' ] );
$output[ 'og:image' ] = $attributes[ 0 ];
$attributes = wp_get_attachment_image_src( self::$config[ 'terms' ][ $object->term_id ][ 'image' ], 'full' );
$output[ 'og:image' ] = $attributes[ 0 ];
$output[ 'og:image:width' ] = $attributes[ 1 ];
$output[ 'og:image:height' ] = $attributes[ 2 ];
} elseif ( self::$config[ 'collections' ][ self::$collection ][ 'image' ] ) {
$attributes = wp_get_attachment_image_src( self::$config[ 'collections' ][ self::$collection ][ 'image' ] );
$output[ 'og:image' ] = $attributes[ 0 ];
$attributes = wp_get_attachment_image_src( self::$config[ 'collections' ][ self::$collection ][ 'image' ], 'full' );
$output[ 'og:image' ] = $attributes[ 0 ];
$output[ 'og:image:width' ] = $attributes[ 1 ];
$output[ 'og:image:height' ] = $attributes[ 2 ];
}
}

$output = apply_filters( 'webcomic_opengraph', $output, $object, self::$collection );

foreach ( ( array ) $output as $k => $v ) {
if ( is_array( $v ) ) {
foreach( $v as $b ) {
echo sprintf( '<meta property="%s" content="%s">', $k, $b ), "\n";
foreach( $v as $x ) {
if ( is_array( $x ) ) {
foreach ( $x as $a => $b ) {
echo sprintf( '<meta %s="%s%s" content="%s">', 0 === strpos( $k, 'twitter' ) ? 'name' : 'property', $k, is_string( $a ) ? $a : '', $b ), "\n";
}
} else {
echo sprintf( '<meta %s="%s" content="%s">', 0 === strpos( $k, 'twitter' ) ? 'name' : 'property', $k, $x ), "\n";
}
}
} else {
echo sprintf( '<meta property="%s" content="%s">', $k, $v ), "\n";
echo sprintf( '<meta %s="%s" content="%s">', 0 === strpos( $k, 'twitter' ) ? 'name' : 'property', $k, $v ), "\n";
}
}
}
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