cc-configurator.php

<?php
/*
Plugin Name: Creative Commons Configurator
Plugin URI: http://www.g-loaded.eu/2006/01/14/creative-commons-configurator-wordpress-plugin/
Description: Helps you publish your content under the terms of Creative Commons and other licenses.
Version: 1.8.16
Author: George Notaras
Author URI: http://www.g-loaded.eu/
License: Apache License v2
Text Domain: cc-configurator
Domain Path: /languages/
*/

/**
 *  Copyright 2008-2015 George Notaras <gnot@g-loaded.eu>, CodeTRAX.org
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

// Prevent direct access to this file.
if ( ! defined( 'ABSPATH' ) ) {
    header( 'HTTP/1.0 403 Forbidden' );
    echo 'This file should not be accessed directly!';
    exit; // Exit if accessed directly
}


// Store plugin directory
define( 'BCCL_PLUGIN_FILE', __FILE__ );
// Store plugin directory
// NOTE: TODO: Consider using __DIR__ (requires PHP >=5.3) instead of dirname.
// See: http://stackoverflow.com/questions/2220443/whats-better-of-requiredirname-file-myparent-php-than-just-require#comment18170996_12129877
//define( 'BCCL_PLUGIN_DIR', plugin_dir_path( __FILE__ ) );
define( 'BCCL_PLUGIN_DIR', dirname(BCCL_PLUGIN_FILE) . '/' );

// Import modules
require( BCCL_PLUGIN_DIR . 'bccl-settings.php' );
require( BCCL_PLUGIN_DIR . 'bccl-admin-panel.php' );
require( BCCL_PLUGIN_DIR . 'bccl-template-tags.php' );
require( BCCL_PLUGIN_DIR . 'bccl-utils.php' );
require( BCCL_PLUGIN_DIR . 'bccl-licenses.php' );
require( BCCL_PLUGIN_DIR . 'bccl-generators.php' );
require( BCCL_PLUGIN_DIR . 'bccl-deprecated.php' );


/*
 * Translation Domain
 *
 * Translation files are searched in: wp-content/plugins
 */
load_plugin_textdomain('cc-configurator', false, dirname( plugin_basename( BCCL_PLUGIN_FILE ) ) . '/languages/');


/**
 * Settings Link in the ``Installed Plugins`` page
 */
function bccl_plugin_actions( $links, $file ) {
    if( $file == plugin_basename( BCCL_PLUGIN_FILE ) && function_exists( "admin_url" ) ) {
        $settings_link = '<a href="' . admin_url( 'options-general.php?page=cc-configurator-options' ) . '">' . __('Settings') . '</a>';
        // Add the settings link before other links
        array_unshift( $links, $settings_link );
    }
    return $links;
}
add_filter( 'plugin_action_links', 'bccl_plugin_actions', 10, 2 );
// ALT: add_filter( 'plugin_action_links_'.plugin_basename( plugin_dir_path( BCCL_PLUGIN_FILE ) . 'plugin.php'), 'admin_plugin_settings_link' );


/**
 *  Return license text for widget
 */
function bccl_get_widget_output( $display_in_archives=false ) {

    $options = get_option("cc_settings");
    if ( $options === FALSE ) {
        return;
    }

    // Archives and homepage/index
    if ( is_archive() || is_front_page() || is_home() ) {
        if ( ! $display_in_archives ) {
            return;
        }
        $post = null;
        // We always use the default license
        $license_slug = $options['cc_default_license'];
        if ( empty($license_slug) ) {
            return;
        }
        $license_data = bccl_get_license_data( $license_slug );
        if ( empty($license_data) ) {
            return;
        }
        // Generate the widget HTML code
        $widget_html = call_user_func( $license_data['generator_func'], $license_slug, $license_data, $post, $options, $minimal=true );
        // Allow filtering of the widget HTML
        $widget_html = apply_filters( 'bccl_widget_html_archives', $widget_html );
        return $widget_html;
    }

    // Licensing is added on posts, pages, attachments and custom post types.
    if ( ! is_singular() || is_front_page() ) {
        return;
    }
    $post = get_queried_object();

    if ( apply_filters('bccl_exclude_license', false, $post) ) {
        return;
    }

    $license_slug = bccl_get_content_license_slug( $post, $options );
    if ( empty($license_slug) ) {
        return;
    }

    $license_data = bccl_get_license_data( $license_slug );
    if ( empty($license_data) ) {
        return;
    }

    // Check whether we should display the widget content or not.
    // In general, if the license block is set to be displayed under the content,
    // then the widget is suppressed.

    if ( is_attachment() ) {
        if ( $options["cc_body_attachments"] == "1" ) {
            return;
        }
    } elseif ( is_page() ) {
        if ( $options["cc_body_pages"] == "1" ) {
            return;
        }
    //} elseif ( is_single() ) {
    } else {    // posts and custom post types.
        if ( $options["cc_body"] == "1" ) {
            return;
        }
    }

    // Append the license block to the content
    $widget_html = call_user_func( $license_data['generator_func'], $license_slug, $license_data, $post, $options, $minimal=true );

    // Allow filtering of the widget HTML
    $widget_html = apply_filters( 'bccl_widget_html', $widget_html );

    return $widget_html;
}



/*
Adds a link element with "license" relation in the web page HEAD area.

Also, adds style for the license block, only if the user has:
 - enabled the display of such a block
 - not disabled internal license block styling
 - if it is single-post view
*/
function bccl_add_to_head_section() {

    $options = get_option("cc_settings");
    if ( $options === FALSE ) {
        return;
    }

    $output = array();

    if ( is_archive() || is_front_page() ) {

        // We use a null post here.
        if ( apply_filters('bccl_exclude_license', false, null) ) {
            return;
        }

    } elseif ( is_singular() ) {

        // Licensing is added on posts, pages, attachments and custom post types.
        $post = get_queried_object();

        if ( apply_filters('bccl_exclude_license', false, $post) ) {
            return;
        }

        $license_slug = bccl_get_content_license_slug( $post, $options );
        if ( empty($license_slug) ) {
            return;
        }

        $license_data = bccl_get_license_data( $license_slug );
        if ( empty($license_data) ) {
            return;
        }

        // If the addition of data in the head section has been enabled
        if ( $options["cc_head"] == "1" ) {

            if ( substr($license_slug, 0, 2) == 'cc' ) {
                // Currently only licenses by the Creative Commons Corporation are
                // supported for inclusion in the HEAD area (CC & CC0).
                // Adds a link element with "license" relation in the web page HEAD area.
                $license_url = apply_filters( 'bccl_license_url', $license_data['url'] );
                if ( ! empty($license_url) ) {
                    $output[] = '<link rel="license" type="text/html" href="' . $license_url . '" />';
                }
            }

        }

    }

    // Internal style. If the user has not deactivated our internal style, print it too
    if ( $options["cc_no_style"] != "1" ) {
        // Adds style for the license block
        $color = $options["cc_color"];
        $bgcolor = $options["cc_bgcolor"];
        $brdrcolor = $options["cc_brdr_color"];
        $style_output = array();
        $style_output[] = '<style type="text/css">';
        //$style_output[] = '<!--';
        $style_output[] = "p.cc-block { clear: both; width: 90%; margin: 8px auto; padding: 4px; text-align: center; border: 1px solid $brdrcolor; color: $color; background-color: $bgcolor; }";
        //$style_output[] = "p.cc-block a:link, p.cc-block a:visited, p.cc-block a:hover, p.cc-block a:active { text-decoration: none; color: $color; border: none; }";
        $style_output[] = "p.cc-block a:link, p.cc-block a:visited, p.cc-block a:hover, p.cc-block a:active { text-decoration: underline; color: $color; border: none;}";
//        $style_output[] = ".cc-block img, .cc-block a img { display: inline; padding: 8px; text-decoration: none; }";
        $style_output[] = ".cc-button { display: block; margin-left: auto; margin-right: auto; margin-top: 6px; margin-bottom: 6px; border-width: 0; }";
//        $style_output[] = ".cc-attached-media-license, .cc-attached-featured-media-license { text-align: center; }";
//        $style_output[] = ".cc-button { border-width: 0; }";
        $style_output[] = ".widget_bccl_widget { text-align: center; }";
        $extra_styles = apply_filters( 'bccl_extra_style', '' );
        if ( ! empty($extra_styles) ) {
            $style_output[] = $extra_styles;
        }
        //$style_output[] = '-->';
        $style_output[] = '</style>';
        $style_output[] = ''; // Blank line
        $style = implode(PHP_EOL, $style_output);
        $style = apply_filters( 'bccl_style', $style );
        $output[] = $style;
    }

    $html = implode(PHP_EOL, $output);
    if ( ! empty($html) ) {
        // Print our comment
        echo PHP_EOL . "<!-- BEGIN License added by Creative-Commons-Configurator plugin for WordPress -->" . PHP_EOL;

        echo $html;

        // Closing comment
        echo PHP_EOL . "<!-- END License added by Creative-Commons-Configurator plugin for WordPress -->" . PHP_EOL . PHP_EOL;
    }
}
add_action('wp_head', 'bccl_add_to_head_section');
// AMP pages
add_action('amp_post_template_head', 'bccl_add_to_head_section');


/**
 * Adds the CC RSS module namespace declaration.
 */
function bccl_add_cc_ns_feed() {

    $options = get_option("cc_settings");
    if ( $options === FALSE ) {
        return;
    }

    $license_slug = $options['cc_default_license']; // We use the general default license
    if ( empty($license_slug) ) {
        return;
    }

    if ( $options["cc_feed"] == "1" ) {
        if ( substr($license_slug, 0, 2) == 'cc' ) {
            // Currently only licenses by the Creative Commons Corporation are
            // supported for inclusion in the feeds (CC & CC0).
            echo "xmlns:creativeCommons=\"http://backend.userland.com/creativeCommonsRssModule\"" . PHP_EOL;
        }
    }
}


/**
 * Adds the CC URL to the feed.
 */
function bccl_add_cc_element_feed() {

    $options = get_option("cc_settings");
    if ( $options === FALSE ) {
        return;
    }

    $license_slug = $options['cc_default_license']; // We use the general default license
    if ( empty($license_slug) ) {
        return;
    }

    $license_data = bccl_get_license_data( $license_slug );
    if ( empty($license_data) ) {
        return;
    }

    if ( $options["cc_feed"] == "1" ) {
        if ( substr($license_slug, 0, 2) == 'cc' ) {
            // Currently only licenses by the Creative Commons Corporation are
            // supported for inclusion in the feeds (CC & CC0).
            $license_url = apply_filters( 'bccl_license_url', $license_data['url'] );
            if ( ! empty($license_url) ) {
                echo "\t<creativeCommons:license>" . $license_url . "</creativeCommons:license>" . PHP_EOL;
            }
        }
    }
}


/**
 * Adds the CC URL to the feed items.
 */
function bccl_add_cc_element_feed_item() {

    // No need to check is_singular() here. We always have a post.
    //$post = get_queried_object();
    // Do not use get_queried_object() as it does not retrieve the item.
    global $post;

    if ( apply_filters('bccl_exclude_license', false, $post) ) {
        return;
    }

    $options = get_option("cc_settings");
    if ( $options === FALSE ) {
        return;
    }

    $license_slug = bccl_get_content_license_slug( $post, $options );
    if ( empty($license_slug) ) {
        return;
    }

    $license_data = bccl_get_license_data( $license_slug );
    if ( empty($license_data) ) {
        return;
    }

    // If the addition of data in the feeds has been enabled
    if ( $options["cc_feed"] == "1" ) {

        if ( substr($license_slug, 0, 2) == 'cc' ) {
            // Currently only licenses by the Creative Commons Corporation are
            // supported for inclusion in the HEAD area (CC & CC0).
            $license_url = apply_filters( 'bccl_license_url', $license_data['url'] );
            if ( ! empty($license_url) ) {
                echo "\t\t<creativeCommons:license>" . $license_url . "</creativeCommons:license>" . PHP_EOL;
            }
        }
    }
}


/*
 * Adds the license block under the published content.
 *
 * The check if the user has chosen to display a block under the published
 * content is performed in bccl_get_license_block(), in order not to retrieve
 * the saved settings two timesor pass them between functions.
 */
function bccl_append_to_post_body($PostBody) {

    // Licensing is added on posts, pages, attachments and custom post types.
    if ( ! is_singular() || is_front_page() ) {
        return $PostBody;
    }
    $post = get_queried_object();

    if ( apply_filters('bccl_exclude_license', false, $post) ) {
        return $PostBody;
    }

    $options = get_option("cc_settings");
    if ( $options === FALSE ) {
        return $PostBody;
    }

    $license_slug = bccl_get_content_license_slug( $post, $options );
    if ( empty($license_slug) ) {
        return $PostBody;
    }

    $license_data = bccl_get_license_data( $license_slug );
    if ( empty($license_data) ) {
        return $PostBody;
    }

    // Option to suppress the license if it is the same with the default.
    if ( apply_filters( 'bccl_suppress_license_if_default', false ) ) {
        if ( $license_slug == $options['cc_default_license'] ) {
            return $PostBody;
        }
    }

    // Append according to options
    if ( is_attachment() ) {
        if ( $options["cc_body_attachments"] != "1" ) {
            return $PostBody;
        }
    } elseif ( is_page() ) {
        if ( $options["cc_body_pages"] != "1" ) {
            return $PostBody;
        }
    //} elseif ( is_single() ) {
    } else {    // posts and custom post types
        if ( $options["cc_body"] != "1" ) {
            return $PostBody;
        }
    }

    // Append the license block to the content
    $cc_block = call_user_func( $license_data['generator_func'], $license_slug, $license_data, $post, $options );
    // HTML code to prepend/append to CC block
    $cc_block = apply_filters( 'bccl_license_block_html', $cc_block );

    //$cc_block = bccl_get_license_block("", "", "default", "default");
    if ( ! empty($cc_block) ) {
        if ( apply_filters( 'bccl_license_block_before_content', false ) ) {
            $PostBody = bccl_add_placeholders($cc_block) . $PostBody;
        } else {
            $PostBody .= bccl_add_placeholders($cc_block);
        }
    }

    return $PostBody;
}
add_filter('the_content', 'bccl_append_to_post_body', 250);

// Feed actions
add_action('rdf_ns', 'bccl_add_cc_ns_feed');
add_action('rdf_header', 'bccl_add_cc_element_feed');
add_action('rdf_item', 'bccl_add_cc_element_feed_item');

add_action('rss2_ns', 'bccl_add_cc_ns_feed');
add_action('rss2_head', 'bccl_add_cc_element_feed');
add_action('rss2_item', 'bccl_add_cc_element_feed_item');

add_action('atom_ns', 'bccl_add_cc_ns_feed');
add_action('atom_head', 'bccl_add_cc_element_feed');
add_action('atom_entry', 'bccl_add_cc_element_feed_item');



//
// Add separate licensing metadata on media.
//


//
// Featured image
//
function bccl_separate_licensing_on_featured_image( $html, $post_id, $post_thumbnail_id, $size, $attr ) {

    // The license data of the featured image is only added on content pages.
    if ( ! is_singular() ) {
        return $html;
    }

    if ( empty($html) ) {
        return $html;
    }

    // Plugin options
    $options = get_option('cc_settings');
    if ( $options === false || $options['cc_enable_individual_media_licensing'] == '0' ) {
        return $html;
    }

    // Size can be a string or array containing width and hight items.
    // We accept only a size as string.
    if ( is_array($size) ) {
        return $html;
    }

    // Individual image licensing is added on posts, pages, attachments and custom post types.
    if ( ! is_singular() || is_front_page() ) {
        return $html;
    }

    $post = get_post($post_id);

    if ( apply_filters('bccl_exclude_license', false, $post) ) {
        return $html;
    }

    // Attachment ID
    // $post_thumbnail_id

    // Current image size's URL
    $main_size_meta = wp_get_attachment_image_src( $post_thumbnail_id, $size );
    $current_attachment_url = $main_size_meta[0];

    // Attachment object
    $attachment = get_post( $post_thumbnail_id );
    $mime_type = get_post_mime_type( $attachment->ID );
    //$attachment_type = strstr( $mime_type, '/', true );
    // See why we do not use strstr(): http://www.codetrax.org/issues/1091
    $attachment_type = preg_replace( '#\/[^\/]*$#', '', $mime_type );
    $attachment_dcmi_type = 'StillImage';

    // License data
    $license_slug = bccl_get_content_license_slug( $attachment, $options );
    if ( empty($license_slug) ) {
        return $html;
    }
    // In case of ARR or manual license, just return the content without adding
    // any image licensing.
    if ( in_array($license_slug, array('manual', 'arr')) ) {
        return $html;
    }
    $license_data = bccl_get_license_data( $license_slug );
    if ( empty($license_data) ) {
        return $html;
    }
    // License URL.
    // We need it for the additional link elements we add in case visible
    // licensing metadata is not enabled and also to abort in case it is empty.
    $license_url = $license_data['url'];
    if ( empty($license_url) ) {
        return $html;
    }

    // License metadata
    $license_metadata = call_user_func( $license_data['generator_func'], $license_slug, $license_data, $attachment, $options, $minimal=false, $is_content_media=true );
    // Allow filtering
    $license_metadata = apply_filters( 'bccl_license_block_media_featured_' . $mime_type . '_html', $license_metadata );

    // Add class
    $license_metadata = '<span class="cc-attached-featured-media-license cc-attached-featured-' . $attachment_type . '-license">' . $license_metadata . '</span>';
    // License metadata as caption itself
    $license_metadata_as_caption = '<p class="wp-caption wp-caption-text caption entry-caption cc-attached-featured-media-license cc-attached-featured-' . $attachment_type . '-license">' . $license_metadata . '</p>';

    // Visible media license metadata switch
    $enable_visible_featured_media_license_metadata = apply_filters('bccl_enable_visible_featured_media_license_metadata', true);

    // Process HTML

    if ( $enable_visible_featured_media_license_metadata ) {
        // Append hyperlink with rel="license".
        //$license_metadata_added = false;
        if ( strpos($html, '</figcaption>') !== false ) {
            // If the figure html element contains a figcaption element,
            // then we add the HTML hyperlink at the end of it.
            $html = str_replace('</figcaption>', ' ' . $license_metadata . '</figcaption>', $html);
            //$license_metadata_added = true;
        } elseif ( strpos($html, '</p>') !== false ) {
            // If the caption is placed in a 'p' element
            $html = str_replace('</p>', ' ' . $license_metadata . '</p>', $html);
            //$license_metadata_added = true;
        } else {
            // Just append the license metadata
            $html .= $license_metadata_as_caption;
        }
    }

    // HTML
    // Note: The link element inside the body needs the property or itemprop attribute.
    $html = '
        <link href="' . esc_url($license_url) . '" rel="license" property="dct.license" type="text/html" />
        <link href="http://purl.org/dc/dcmitype/' .  esc_attr($attachment_dcmi_type) . '" rel="dct:type" property="dct:type" />
        <link href="' . esc_url(get_permalink($attachment->ID)) . '" rel="dct:identifier" property="dct:identifier" />
        ' . $html;
    // Enclose all HTML in our div element.
    $html = '<div class="cc-block-media" prefix="dct: http://purl.org/dc/terms/ cc: http://creativecommons.org/ns#" about="' . esc_url( $current_attachment_url ) . '">' . $html . '</div>';

    return $html;


}
add_filter('post_thumbnail_html', 'bccl_separate_licensing_on_featured_image', 10, 5);


//
// Images using the 'caption' shortcode
//

function bccl_separate_licensing_on_images( $dummy, $attr, $content ) {

    // Plugin options
    $options = get_option('cc_settings');
    if ( $options === false || $options['cc_enable_individual_media_licensing'] == '0' ) {
        return $content;
    }

    // Individual image licensing is added on posts, pages, attachments and custom post types.
    if ( ! is_singular() || is_front_page() ) {
        return $content;
    }

    $post = get_queried_object();

    if ( apply_filters('bccl_exclude_license', false, $post) ) {
        return $content;
    }

    // Attachment ID
    // The shortcode about images contains the image attachment ID as 'attachment_N'
    // For videos and audio the $attr array does not contain the attachment ID.
    // In those cases we retrieve the ID by querying the database using bccl_attachment_id_from_url().
    if ( ! isset($attr['id']) ) {
        return $content;
    }
    // Find the attachement id from $attr['id'] (format: attachment_ID)
    $id_str = str_replace('attachment_', '', $attr['id']);
    if ( ! is_numeric($id_str) ) {
        return $content;
    }
    $id = absint($id_str);

    // Current image size's URL
    $current_attachment_url = '';
    // Image URL.
    if ( preg_match('#<img.* src="([^"]+)"#', $content, $matches) ) {
        // First try regex on the $content
        $current_attachment_url = $matches[1];
    } else {
        // Otherwise, use the URL of the full image size.
        $main_size_meta = wp_get_attachment_image_src( $id, 'full' );
        $current_attachment_url = $main_size_meta[0];
    }
    if ( empty($current_attachment_url) ) {
        return $content;
    }

    // Attachment object
    $attachment = get_post( $id );
    $mime_type = get_post_mime_type( $attachment->ID );
    //$attachment_type = strstr( $mime_type, '/', true );
    // See why we do not use strstr(): http://www.codetrax.org/issues/1091
    $attachment_type = preg_replace( '#\/[^\/]*$#', '', $mime_type );
    $attachment_dcmi_type = 'StillImage';

    // License data
    $license_slug = bccl_get_content_license_slug( $attachment, $options );
    if ( empty($license_slug) ) {
        return $content;
    }
    // In case of ARR or manual license, just return the content without adding
    // any image licensing.
    if ( in_array($license_slug, array('manual', 'arr')) ) {
        return $content;
    }
    $license_data = bccl_get_license_data( $license_slug );
    if ( empty($license_data) ) {
        return $content;
    }
    // License URL.
    // We need it for the additional link elements we add in case visible
    // licensing metadata is not enabled and also to abort in case it is empty.
    $license_url = $license_data['url'];
    if ( empty($license_url) ) {
        return $content;
    }

    // HTML
    // Currently (WP 4.2.2) it's not possible to filter the final HTML output of img_caption_shortcode().
    // So, here we first remove our current function for the filter hook, then run
    // img_caption_shortcode() to get the default final HTML output and then process
    // it and add our licensing metadata.
    // See about this method: https://core.trac.wordpress.org/ticket/29832#comment:1

    remove_filter('img_caption_shortcode', __FUNCTION__, 10, 3);

    $html = img_caption_shortcode( $attr, $content );
    if ( empty($html) ) {
        return $content;
    }

    add_filter('img_caption_shortcode', __FUNCTION__, 10, 3);

    // License metadata
    $license_metadata = call_user_func( $license_data['generator_func'], $license_slug, $license_data, $attachment, $options, $minimal=false, $is_content_media=true );
    // Allow filtering
    $license_metadata = apply_filters( 'bccl_license_block_media_' . $mime_type . '_html', $license_metadata );

    // Add class
    $license_metadata = '<span class="cc-attached-media-license cc-attached-' . $attachment_type . '-license">' . $license_metadata . '</span>';
    // License metadata as caption itself
    $license_metadata_as_caption = '<p class="wp-caption wp-caption-text caption entry-caption cc-attached-media-license cc-attached-' . $attachment_type . '-license">' . $license_metadata . '</p>';

    // Visible media license metadata switch
    $enable_visible_media_license_metadata = apply_filters('bccl_enable_visible_media_license_metadata', true);

    // Process HTML

    if ( $enable_visible_media_license_metadata ) {
        // Append hyperlink with rel="license".
        //$license_metadata_added = false;
        if ( strpos($html, '</figcaption>') !== false ) {
            // If the figure html element contains a figcaption element,
            // then we add the HTML hyperlink at the end of it.
            $html = str_replace('</figcaption>', ' ' . $license_metadata . '</figcaption>', $html);
            //$license_metadata_added = true;
        } elseif ( strpos($html, '</p>') !== false ) {
            // If the caption is placed in a 'p' element
            $html = str_replace('</p>', ' ' . $license_metadata . '</p>', $html);
            //$license_metadata_added = true;
        } else {
            // Just append the license metadata
            $html .= $license_metadata_as_caption;
        }
    }

    // HTML
    // Note: The link element inside the body needs the property or itemprop attribute.
    $html = '
        <link href="' . esc_url($license_url) . '" rel="license" property="dct.license" type="text/html" />
        <link href="http://purl.org/dc/dcmitype/' .  esc_attr($attachment_dcmi_type) . '" rel="dct:type" property="dct:type" />
        <link href="' . esc_url(get_permalink($attachment->ID)) . '" rel="dct:identifier" property="dct:identifier" />
        ' . $html;
    // Enclose all HTML in our div element.
    $html = '<div class="cc-block-media" prefix="dct: http://purl.org/dc/terms/ cc: http://creativecommons.org/ns#" about="' . esc_url( $current_attachment_url ) . '">' . $html . '</div>';

    return $html;


}
add_filter('img_caption_shortcode', 'bccl_separate_licensing_on_images', 10, 3);


//
// Video and Audio
//

function bccl_separate_licensing_on_video_audio( $html, $atts, $attachment, $post_id, $library ) {

    // Plugin options
    $options = get_option('cc_settings');
    if ( $options === false || $options['cc_enable_individual_media_licensing'] == '0' ) {
        return $html;
    }

    // Individual image licensing is added on posts, pages, attachments and custom post types.
    if ( ! is_singular() || is_front_page() ) {
        return $html;
    }

    //$post = get_queried_object();
    $post = get_post($post_id);

    if ( apply_filters('bccl_exclude_license', false, $post) ) {
        return $html;
    }

    // Attachment ID
    // Unfortunately, WP does not provide enough information in order to determine the attachment ID
    // So, first collect all the audio/video media file URLs in $attachments_urls
    $attachments_data = get_post_meta( $post->ID, 'enclosure', false );
    //var_dump($attachments_data);
    $attachments_urls = array();
    foreach ( $attachments_data as $attachment_data ) {
        $parts = preg_split('#\R#u', $attachment_data);
        $attachments_urls[] = $parts[0];
    }
    //var_dump($attachments_urls);
    // Then check which media file URL exists in the $atts array so as to
    // determine which attachment we are processing currently.
    $atts_values = array_values($atts);
    //var_dump($atts_values);
    // Find the URL of the attachment we are processing
    $current_attachment_url = '';
    foreach ( $attachments_urls as $attachment_url) {
        if ( in_array($attachment_url, $atts_values) ) {
            $current_attachment_url = $attachment_url;
            break;
        }
    }
    // Now use this URL to directly query the database for the post ID of the
    // attachment with guid = $current_attachment_url
    $id = bccl_attachment_id_from_url($current_attachment_url);
    if ( empty($id) ) {
        return $html;
    }
    //var_dump($id);

    // Attachment object
    $attachment = get_post( $id );
    $mime_type = get_post_mime_type( $attachment->ID );
    //$attachment_type = strstr( $mime_type, '/', true );
    // See why we do not use strstr(): http://www.codetrax.org/issues/1091
    $attachment_type = preg_replace( '#\/[^\/]*$#', '', $mime_type );
    $attachment_dcmi_type = '';
    if ( 'video' == $attachment_type ) {
        $attachment_dcmi_type = 'MovingImage';
    } elseif ( 'audio' == $attachment_type ) {
        $attachment_dcmi_type = 'Sound';
    }

    // License data
    $license_slug = bccl_get_content_license_slug( $attachment, $options );
    if ( empty($license_slug) ) {
        return $html;
    }
    // In case of ARR or manual license, just return the content without adding
    // any media licensing.
    if ( in_array($license_slug, array('manual', 'arr')) ) {
        return $html;
    }
    $license_data = bccl_get_license_data( $license_slug );
    if ( empty($license_data) ) {
        return $html;
    }
    // License URL.
    // We need it for the additional link elements we add in case visible
    // licensing metadata is not enabled and also to abort in case it is empty.
    $license_url = $license_data['url'];
    if ( empty($license_url) ) {
        return $html;
    }

    // License metadata
    $license_metadata = call_user_func( $license_data['generator_func'], $license_slug, $license_data, $attachment, $options, $minimal=false, $is_content_media=true );
    // Allow filtering
    $license_metadata = apply_filters( 'bccl_license_block_media_' . $mime_type . '_html', $license_metadata );

    // Add class
    // On video/audio captions we always use a p element since WP does not seem to generate any caption so far.
    $license_metadata = '<p class="wp-caption wp-caption-text caption entry-caption cc-attached-media-license cc-attached-' . $attachment_type . '-license">' . $license_metadata . '</p>';

    // Visible media license metadata switch
    $enable_visible_media_license_metadata = apply_filters('bccl_enable_visible_media_license_metadata', true);

    // WE ALREADY HAVE THE FINAL HTML

    //
    // Process
    //

    if ( $enable_visible_media_license_metadata ) {
        $html .= $license_metadata;
    }

    // HTML
    // Note: The link element inside the body needs the property or itemprop attribute.
    $html = '
        <link href="' . esc_url($license_url) . '" rel="license" property="dct.license" type="text/html" />
        <link href="http://purl.org/dc/dcmitype/' .  esc_attr($attachment_dcmi_type) . '" rel="dct:type" property="dct:type" />
        <link href="' . esc_url(get_permalink($attachment->ID)) . '" rel="dct:identifier" property="dct:identifier" />
        ' . $html;
    // Enclose all HTML in our div element.
    $html = '<div class="cc-block-media" prefix="dct: http://purl.org/dc/terms/ cc: http://creativecommons.org/ns#" about="' . esc_url( $current_attachment_url ) . '">' . $html . '</div>';

    return $html;

}

// Does not work for Videos.
add_filter('wp_video_shortcode', 'bccl_separate_licensing_on_video_audio', 10, 5);
add_filter('wp_audio_shortcode', 'bccl_separate_licensing_on_video_audio', 10, 5);



// Testing
function bccl_add_caption_style( $style ) {
/*
.cc-attached-media-license {
    margin: 0 0 1.714285714rem;
    font-style: italic;
    font-size: 12px;
    font-size: .857142857rem;
    line-height: 2;
    color: #757575;
}
*/
    return $style . '.cc-attached-media-license { margin: 0 0 1.714285714rem; font-style: italic; font-size: 12px; font-size: .857142857rem; line-height: 2; color: #757575;';
}
//add_filter('bccl_extra_style', 'bccl_add_caption_style');