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navis-media-credit.php
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navis-media-credit.php
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<?php
/*
* Plugin Name: Navis Media Credit
* Plugin URI: http://argoproject.org/
* Description: Adds support for credit fields on media stored in WordPress
* Version: 0.1
* Author: Project Argo
* Author URI: http://argoproject.org/
* License: GPLv2
* */
define( 'MEDIA_CREDIT_POSTMETA_KEY', '_media_credit' );
function navis_get_media_credit( $id ) {
// XXX: do we need to get the post->ID or can we just use this ID??
$post = get_post( $id );
if ( ! $post ) {
return false;
}
$creditor = new Media_Credit( $post->ID );
return $creditor;
}
class Navis_Media_Credit {
function __construct() {
add_filter( 'navis_media_credit_for_attachment',
'get_media_credit_for_attachment', 10, 2
);
add_filter(
'img_caption_shortcode',
array( &$this, 'caption_shortcode' ), 10, 3
);
if ( ! is_admin() )
return;
add_action(
'admin_init',
array( &$this, 'admin_init' )
);
add_filter(
'attachment_fields_to_save',
array( &$this, 'save_media_credit' ), 10, 2
);
add_filter(
'attachment_fields_to_edit',
array( &$this, 'add_media_credit' ), 10, 2
);
add_filter(
'image_send_to_editor',
array( &$this, 'add_caption_shortcode' ), 19, 8
);
// Custom plugin only works for TinyMCE 3
global $tinymce_version;
if ( -1 === version_compare( $tinymce_version, '4018-20140303' ) ) {
add_filter(
'mce_external_plugins',
array( &$this, 'plugins_monkeypatching' )
);
} else {
add_filter( 'pre_post_content', array( $this, 'filter_pre_post_content_fix_credit' ) );
}
}
function admin_init() {
remove_filter( 'image_send_to_editor', 'image_add_caption', 20, 8 );
}
function get_media_credit_for_attachment( $text = '', $id ) {
$creditor = navis_get_media_credit( $id );
if ( ! $creditor ) {
return $text;
}
return $text . $creditor->to_string();
}
function add_media_credit( $fields, $post ) {
$creditor = navis_get_media_credit( $post );
$fields[ 'media_credit' ] = array(
'label' => 'Credit',
'input' => 'text',
'value' => ! empty( $creditor ) ? $creditor->credit : '',
);
$fields[ 'media_credit_url' ] = array(
'label' => 'Credit URL',
'input' => 'text',
'value' => ! empty( $creditor ) ? $creditor->credit_url : '',
);
$fields[ 'navis_media_credit_org' ] = array(
'label' => 'Organization',
'input' => 'text',
'value' => ! empty( $creditor->org ) ? $creditor->org : '',
);
$checked = ! empty( $creditor->can_distribute ) ? 'checked="checked"' : "";
$distfield = 'attachments[' . $post->ID . '][navis_media_can_distribute]';
$fields[ 'navis_media_can_distribute' ] = array(
'label' => 'Can<br />distribute?',
'input' => 'html',
'html' => '<input id="' . $distfield . '" name="' . $distfield . '" type="checkbox" value="1" ' . $checked . ' />'
);
return $fields;
}
function save_media_credit( $post, $attachment ) {
$creditor = new Media_Credit( $post['ID'] );
$fields = array( 'media_credit', 'media_credit_url', 'navis_media_credit_org', 'navis_media_can_distribute' );
foreach ( $fields as $field ) {
if ( $_POST['attachments'] && isset( $_POST['attachments'][$post['ID']][$field] ) ) {
$input = sanitize_text_field( $_POST['attachments'][$post['ID']][$field] );
}
else {
// XXX: not sure if this branch is ever followed
if ( isset( $_POST[ $field ] ) ) {
$input = sanitize_text_field( $_POST[ $field ] );
} else if ( isset( $_POST[ "attachments[" . $post['ID'] . "][" . $field . "]" ] ) ) {
$input = sanitize_text_field( $_POST[ "attachments[" . $post['ID'] . "][" . $field . "]" ] );
} else {
$input = '';
}
}
$creditor->update( $field, $input );
}
return $post;
}
/**
* navis_add_caption_shortcode(): replaces the built-in caption shortcode
* with one that supports a credit field.
*/
function add_caption_shortcode( $html, $id, $caption, $title, $align, $url, $size, $alt = '' ) {
$creditor = navis_get_media_credit( $id );
if ( empty( $caption ) && !$creditor->to_string()) {
return $html;
};
$id = ( 0 < (int) $id ) ? 'attachment_' . $id : '';
if ( ! preg_match( '/width="([0-9]+)/', $html, $matches ) )
return $html;
$width = $matches[1];
// XXX: not sure what this does
$html = preg_replace( '/(class=["\'][^\'"]*)align(none|left|right|center)\s?/', '$1', $html );
if ( empty($align) )
$align = 'none';
$shcode = '[caption id="' . $id . '" align="align' . $align .
'" width="' . $width . '" caption="' . $caption . '"';
global $tinymce_version;
if ( -1 === version_compare( $tinymce_version, '4018-20140303' ) ) {
$shcode .= ' credit="' . addslashes( $creditor->to_string() ) . '"';
}
$shcode .= ']' . $html . '[/caption]';
return $shcode;
}
/**
* navis_image_shortcode(): renders caption shortcodes with our layout
* and credit field.
*/
function caption_shortcode( $text, $atts, $content ) {
$atts = shortcode_atts( array(
'id' => '',
'align' => 'alignnone',
'width' => '',
'credit' => '',
'caption' => '',
), $atts );
$atts = apply_filters( 'navis_image_layout_defaults', $atts );
if ( $atts['id'] && empty( $atts['credit'] ) ) {
$post_id = str_replace( 'attachment_', '', $atts['id'] );
$creditor = navis_get_media_credit( $post_id );
$credit = ! empty( $creditor ) ? $creditor->to_string() : '';
}
// XXX: maybe remove module and image classes at some point
$out = sprintf(
'<div id="%s" class="wp-caption module image %s" style="max-width: %spx;">%s',
esc_attr( $atts['id'] ),
esc_attr( $atts['align'] ),
esc_attr( $atts['width'] ),
do_shortcode( $content )
);
if ( isset( $credit ) ) {
$out .= sprintf(
'<p class="wp-media-credit">%s</p>',
wp_kses_post( $credit )
);
}
if ( !empty( $atts['caption'] ) ) {
$out .= sprintf( '<p class="wp-caption-text">%s</p>', wp_kses_post( $atts['caption'] ) );
}
$out .= "</div>";
return $out;
}
function plugins_monkeypatching( $plugins ) {
$plugins[ 'argo_wpeditimage' ] = get_stylesheet_directory_uri() . '/lib/navis-media-credit/js/media_credit_editor_plugin.js';
return $plugins;
}
/**
* For TinyMCE 4 and greater, fix mangled [caption shortcodes]
*/
function filter_pre_post_content_fix_credit( $post_content ) {
if ( empty( $post_content ) || false === strpos( $post_content, '\\" credit=\\"' ) ) {
return $post_content;
}
// [caption id="attachment_18" align="alignright" width="336" caption=" " credit="Daniel Bachhuber / The pants"]<a href="http://largo.dev/wp-content/uploads/2014/04/IMG_0502.jpg"><img class="size-medium wp-image-18" alt="IMG_0502" src="http://largo.dev/wp-content/uploads/2014/04/IMG_0502-336x252.jpg" width="336" height="252" /></a>[/caption]
// [caption id="attachment_18" align="alignright" width="336"]<a href="http://largo.dev/wp-content/uploads/2014/04/IMG_0502.jpg"><img class="size-medium wp-image-18" src="http://largo.dev/wp-content/uploads/2014/04/IMG_0502-336x252.jpg" alt="IMG_0502" width="336" height="252" /></a> " credit="Daniel Bachhuber / The pants[/caption]
$post_content = preg_replace( '/\\"\scredit=\\\"[\w\s\/\\\]+[^"[]/', '', $post_content );
return $post_content;
}
}
new Navis_Media_Credit;
class Media_Credit {
function __construct( $post_id ) {
$this->post_id = $post_id;
$this->credit = get_post_meta( $post_id,
MEDIA_CREDIT_POSTMETA_KEY, true
);
$this->credit_url = get_post_meta( $post_id,
'_media_credit_url', true
);
$this->org = get_post_meta( $post_id,
'_navis_media_credit_org', true
);
$this->can_distribute = get_post_meta( $post_id,
'_navis_media_can_distribute', true
);
}
function to_string() {
if ( $this->credit && $this->org ) {
return sprintf( "%s / %s", esc_attr( $this->credit ),
esc_attr( $this->org ) );
} elseif ( $this->credit ) {
return esc_attr( $this->credit );
} elseif ( $this->org ) {
return esc_attr( $this->org );
}
}
function update( $field, $value ) {
return update_post_meta( $this->post_id, '_' . $field, $value );
}
}