<?php

/**
 * @since 3.0
 */
function awpcp_content_placeholders() {
    static $placeholders = null;

    if (is_array($placeholders)) return $placeholders;

    /* placeholders available prior to AWPCP 3.0 */
    $legacy_placeholders = array(
        // single ad placeholders
        'ad_title' => array(
            'callback' => 'awpcp_do_placeholder_title',
        ),
        'ad_categoryurl' => array(
            'callback' => 'awpcp_do_placeholder_category_url',
        ),
        'ad_categoryname' => array(
            'callback' => 'awpcp_do_placeholder_category_name',
        ),
        'adcontact_name' => array(
            'callback' => 'awpcp_do_placeholder_contact_name',
        ),
        'adcontactphone' => array(
            'callback' => 'awpcp_do_placeholder_contact_phone',
        ),
        'codecontact' => array(
            'callback' => 'awpcp_do_placeholder_contact_url',
        ),
        'awpcpvisitwebsite' => array(
            'callback' => 'awpcp_do_placeholder_website_link',
        ),
        'addetails' => array(
            'callback' => 'awpcp_do_placeholder_details',
            ),
        'location' => array(
            'callback' => 'awpcp_do_placeholder_location',
        ),
        'city' => array(
            'callback' => 'awpcp_do_placeholder_location',
        ),
        'state' => array(
            'callback' => 'awpcp_do_placeholder_location',
        ),
        'village' => array(
            'callback' => 'awpcp_do_placeholder_location',
        ),
        'country' => array(
            'callback' => 'awpcp_do_placeholder_location',
        ),
        'aditemprice' => array(
            'callback' => 'awpcp_do_placeholder_price',
        ),
        'ad_startdate' => array(
            'callback' => 'awpcp_do_placeholder_legacy_dates',
        ),
        'ad_postdate' => array(
            'callback' => 'awpcp_do_placeholder_legacy_dates',
        ),

        'featureimg' => array(
            'callback' => 'awpcp_do_placeholder_images',
        ),
        'awpcpshowadotherimages' => array(
            'callback' => 'awpcp_do_placeholder_images',
        ),

        'awpcpextrafields' => array(
            'callback' => 'awpcp_do_placeholder_extra_fields',
        ),
        'showadsense1' => array(
            'callback' => 'awpcp_do_placeholder_adsense',
        ),
        'showadsense2' => array(
            'callback' => 'awpcp_do_placeholder_adsense',
        ),
        'showadsense3' => array(
            'callback' => 'awpcp_do_placeholder_adsense',
        ),
        'awpcpadviews' => array(
            'callback' => 'awpcp_do_placeholder_legacy_views',
        ),

        'flagad' => array(
            'callback' => 'awpcp_do_placeholder_flag_link',
        ),

        'tweetbtn' => array(
            'callback' => 'awpcp_do_placeholder_twitter_button',
        ),
        'sharebtn' => array(
            'callback' => 'awpcp_do_placeholder_facebook_button',
        ),

        // listings [only] placeholders
        'url_showad' => array(
            'callback' => 'awpcp_do_placeholder_url',
        ),
        'addetailssummary' => array(
            'callback' => 'awpcp_do_placeholder_excerpt',
        ),
        'awpcp_city_display' => array(
            'callback' => 'awpcp_do_placeholder_location',
        ),
        'awpcp_state_display' => array(
            'callback' => 'awpcp_do_placeholder_location',
        ),
        'awpcp_country_display' => array(
            'callback' => 'awpcp_do_placeholder_location',
        ),
        'awpcp_display_price' => array(
            'callback' => 'awpcp_do_placeholder_price',
        ),
        'awpcpadpostdate' => array(
            'callback' => 'awpcp_do_placeholder_legacy_dates',
        ),
        'imgblockwidth' => array(
            'callback' => 'awpcp_do_placeholder_images',
        ),
        'awpcp_image_name_srccode' => array(
            'callback' => 'awpcp_do_placeholder_images',
        ),

        'awpcp_display_adviews' => array(
            'callback' => 'awpcp_do_placeholder_legacy_views',
        ),
    );

    /* new placeholders added in AWPCP 3.0 */
    $placeholders = array(
        // common placeholders
        'url' => array(),
        'title' => array(),
        'title_link' => array(
            'callback' => 'awpcp_do_placeholder_title',
        ),
        'category_url' => array(),
        // 'category_link' => array(),
        'category_name' => array(),
        'details' => array(),
        'excerpt' => array(),
        'contact_name' => array(),
        'contact_phone' => array(
            'callback' => 'awpcp_do_placeholder_contact_phone',
        ),
        'contact_url' => array(),
        'website_link' => array(),
        'website_url' => array(),
        // 'city' => array(),
        // 'state' => array(),
        // 'country' => array(),
        'county' => array(
            'callback' => 'awpcp_do_placeholder_location',
        ),
        'region' => array(
            'callback' => 'awpcp_do_placeholder_location',
        ),
        'price' => array(),
        'start_date' => array(
            'callback' => 'awpcp_do_placeholder_dates',
        ),
        'posted_date' => array(
            'callback' => 'awpcp_do_placeholder_dates',
        ),

        'featured_image' => array(
            'callback' => 'awpcp_do_placeholder_images',
        ),

        'views' => array(),

        'extra_fields' => array(
            'callback' => 'awpcp_do_placeholder_extra_fields',
        ),

        'twitter_button' => array(),
        'facebook_button' => array(),

        // single ad [only] placeholders
        'images' => array(),
        'adsense' => array(),
        'flag_link' => array(),

        // listings [only] placeholders
        'thumbnail_width' => array(
            'callback' => 'awpcp_do_placeholder_images',
        ),
    );

    $placeholders = array_merge($legacy_placeholders, $placeholders);
    $placeholders = apply_filters('awpcp-content-placeholders', $placeholders);

    foreach ($placeholders as $placeholder => $params) {
        if (!isset($placeholders[$placeholder]['callback'])) {
            $placeholders[$placeholder]['callback'] = "awpcp_do_placeholder_{$placeholder}";
        }
    }
    krsort($placeholders);

    return $placeholders;
}

/**
 * @since 3.0
 */
function awpcp_do_placeholders($ad, $content, $context) {
    $original_content = $content;

    $placeholders = awpcp_content_placeholders();
    $placeholders_names = array_keys($placeholders);
    $pattern = sprintf('\$%s', join('|\$', array_map('preg_quote', $placeholders_names)));

    preg_match_all("/$pattern/s", $content, $matches);

    $processed = array();
    foreach ($matches[0] as $match) {
        if (isset($processed[$match])) continue;

        $placeholder = trim($match, '$');
        $callback = $placeholders[$placeholder]['callback'];

        if (function_exists($callback)) {
            $replacement = call_user_func($callback, $ad, $placeholder, $context);
            $content = str_replace($match, $replacement, $content);
            $processed[$match] = true;
        } else {
        }
    }

    return $content;
}

/**
 * @since 3.0
 */
function awpcp_do_placeholder_url($ad, $placeholder) {
    return url_showad($ad->ad_id);
}

/**
 * @since 3.0
 */
function awpcp_do_placeholder_title($ad, $placeholder) {
    $url = url_showad($ad->ad_id);
    $replacements['ad_title'] = sprintf('<a href="%s">%s</a>', $url, $ad->get_title());
    $replacements['title'] = $ad->get_title();
    $replacements['title_link'] = $replacements['ad_title'];

    return $replacements[$placeholder];
}

/**
 * @since 3.0
 */
function awpcp_do_placeholder_category_name($ad, $placeholder) {
    return stripslashes(get_adcatname($ad->ad_category_id));
}

/**
 * @since 3.0
 */
function awpcp_do_placeholder_category_url($ad, $placeholder) {
    return url_browsecategory($ad->ad_category_id);
}


/**
 * @since 3.0
 */

function awpcp_do_placeholder_details($ad, $placeholder) {
    static $replacements = array();

    if (isset($replacements[$ad->ad_id])) {
        return $replacements[$ad->ad_id][$placeholder];
    }

    $placeholders['addetails'] = apply_filters('awpcp-ad-details', stripslashes_deep($ad->ad_details));

    if (get_awpcp_option('hyperlinkurlsinadtext')) {
        $pattern = '#(?<!")(http://[^\s]+)(?!")#';
        $nofollow = get_awpcp_option('visitwebsitelinknofollow') ? 'rel="nofollow"' : '';
        $link = sprintf('<a %s href="$1">$1</a>', $nofollow);
        $placeholders['addetails'] = preg_replace($pattern, $link, $placeholders['addetails']);
    }

    $placeholders['addetails'] = nl2br($placeholders['addetails']);
    $placeholders['details'] = $placeholders['addetails'];

    $replacements[$ad->ad_id] = $placeholders;

    return $replacements[$ad->ad_id][$placeholder];
}


/**
 * @since 3.0
 */
function awpcp_do_placeholder_excerpt($ad, $placeholder) {
    $details = stripslashes_deep($ad->ad_details);
    $replacements['addetailssummary'] = wp_trim_words($details, 20, '');
    $replacements['excerpt'] = wp_trim_words($details, 20);
    return $replacements[$placeholder];
}


/**
 * @since 3.0
 */
function awpcp_do_placeholder_contact_name($ad, $placeholder) {
    return stripslashes($ad->ad_contact_name);
}


/**
 * @since 3.0
 */
function awpcp_do_placeholder_website_url($ad, $placeholder) {
    return $ad->websiteurl;
}


/**
 * @since 3.0
 */
function awpcp_do_placeholder_website_link($ad, $placeholder) {
    $nofollow = get_awpcp_option('visitwebsitelinknofollow') ? 'rel="nofollow"' : '';
    $label = __('Visit Website', 'AWPCP');

    if (!empty($ad->websiteurl)) {
        $url = awpcp_esc_attr($ad->websiteurl);

        $content = '<br/><a %s href="%s" target="_blank">%s</a>';
        $content = sprintf($content, $nofollow, $url, $label);
        $replacements['awpcpvisitwebsite'] = $content;

        $content = '<a %s href="%s" target="_blank">%s</a>';
        $content = sprintf($content, $nofollow, $url, $label);
        $replacements['website_link'] = $content;
    } else {
        $replacements['awpcpvisitwebsite'] = '';
        $replacements['website_link'] = '';
    }

    return $replacements[$placeholder];
}


/**
 * @since 3.0
 */
function awpcp_do_placeholder_price($ad, $placeholder) {
    $price = empty($ad->ad_item_price) ? 0 : ($ad->ad_item_price / 100);

    $replacements = array();
    if ($price >= 1 && get_awpcp_option('displaypricefield') == 1) {
        $label = __('Price', 'AWPCP');
        $currency = awpcp_format_money($price);
        // single ad
        $content = '<div class="showawpcpadpage"><label>%s</label>: <strong>%s</strong></div>';
        $replacements['aditemprice'] = sprintf($content, $label, $currency);
        // listings
        $replacements['awpcp_display_price'] = sprintf('%s: %s', $label, $currency);

        $replacements['price'] = $currency;
    }

    return awpcp_array_data( $placeholder, '', $replacements );
}


/**
 * @since 3.0
 */
function awpcp_do_placeholder_dates($ad, $placeholder) {
    $replacements['start_date'] = awpcp_time($ad->ad_startdate, 'awpcp-date');
    $replacements['posted_date'] = awpcp_time($ad->ad_postdate, 'awpcp-date');

    return $replacements[$placeholder];
}


/**
 * @since 3.0
 */
function awpcp_do_placeholder_images($ad, $placeholder) {
    global $wpdb;
    global $awpcp_imagesurl;

    static $replacements = array();

    if (isset($replacements[$ad->ad_id])) {
        return $replacements[$ad->ad_id][$placeholder];
    }

    $thumbnail_width = get_awpcp_option('displayadthumbwidth');
    $url = url_showad($ad->ad_id);

    if (get_awpcp_option('imagesallowdisallow') == 1) {
        $images_uploaded = get_total_imagesuploaded($ad->ad_id);
        $primary_image = awpcp_get_ad_primary_image($ad->ad_id);

        if ($primary_image) {
            $large_image = awpcp_get_image_url($primary_image, 'large');
            $thumbnail = awpcp_get_image_url($primary_image, 'primary');

            if (get_awpcp_option('show-click-to-enlarge-link', 1)) {
                $link = '<a class="thickbox enlarge" href="%s">%s</a>';
                $link = sprintf($link, $large_image, __('Click to enlarge image.', 'AWPCP'));
            } else {
                $link = '';
            }

            // single ad
            $content = '<div class="awpcp-ad-primary-image" style="float:right;">';
            $content.= '<a class="thickbox thumbnail" href="%s">';
            $content.= '<img class="thumbshow" src="%s"/>';
            $content.= '</a>%s';
            $content.= '</div>';

            $placeholders['featureimg'] = sprintf($content, esc_attr($large_image),
                                                             esc_attr($thumbnail),
                                                             $link);

            // listings
            $content = '<a href="%s"><img src="%s" width="%spx" border="0" alt="%s" /></a>';
            $content = sprintf($content, $url, $thumbnail, $thumbnail_width, awpcp_esc_attr($ad->ad_title));

            $placeholders['awpcp_image_name_srccode'] = $content;
        }

        if ($images_uploaded >= 1) {
            $query = "SELECT image_name FROM " . AWPCP_TABLE_ADPHOTOS . " ";
            $query.= "WHERE ad_id = %d AND disabled = 0 ";
            $query.= "ORDER BY is_primary ASC, image_name ASC";
            $query = $wpdb->prepare($query, $ad->ad_id, $primary_image->key_id);

            $results = $wpdb->get_results($query);
            $images = array();

            $columns = get_awpcp_option('display-thumbnails-in-columns', 0);
            $rows = $columns > 0 ? ceil(count($results) / $columns) : 0;
            $shown = 0;

            foreach ($results as $image) {
                $large_image = awpcp_get_image_url($image, 'large');
                $thumbnail = awpcp_get_image_url($image, 'thumbnail');

                if ($columns > 0) {
                    $css = join(' ', awpcp_get_grid_item_css_class(array(), $shown, $columns, $rows));
                } else {
                    $css = '';
                }

                $content = '<li class="%s">';
                $content.= '<a class="thickbox" href="%s">';
                $content.= '<img class="thumbshow" src="%s" />';
                $content.= '</a>';
                $content.= '</li>';

                $images[] = sprintf($content, esc_attr($css),
                                              esc_attr($large_image),
                                              esc_attr($thumbnail));
            }

            $placeholders['awpcpshowadotherimages'] = join('', $images);

            $content = '<ul class="awpcp-single-ad-images">%s</ul>';
            $placeholders['images'] = sprintf($content, $placeholders['awpcpshowadotherimages']);
        }
    }

    // fallback thumbnail
    if (!isset($placeholders['awpcp_image_name_srccode'])) {
        $thumbnail = sprintf('%s/adhasnoimage.gif', $awpcp_imagesurl);
        $content = '<a href="%s"><img src="%s" width="%spx" border="0" alt="%s" /></a>';
        $content = sprintf($content, $url, $thumbnail, $thumbnail_width, awpcp_esc_attr($ad->ad_title));

        $placeholders['awpcp_image_name_srccode'] = $content;
    }

    $placeholders['featureimg'] = awpcp_array_data('featureimg', '', $placeholders);
    $placeholders['awpcpshowadotherimages'] = awpcp_array_data('awpcpshowadotherimages', '', $placeholders);
    $placeholders['imgblockwidth'] = "{$thumbnail_width}px";

    $placeholders['featured_image'] = $placeholders['featureimg'];
    $placeholders['images'] = awpcp_array_data('images', '', $placeholders);
    $placeholders['thumbnail_width'] = "{$thumbnail_width}px";

    $replacements[$ad->ad_id] = $placeholders;

    return $replacements[$ad->ad_id][$placeholder];
}


/**
 * @since 3.0
 */
function awpcp_do_placeholder_views($ad, $placeholder) {
    return $ad->ad_views;
}


/**
 * @since 3.0
 */
function awpcp_do_placeholder_legacy_dates($ad, $placeholder) {
    $replacements['ad_startdate'] = awpcp_time( $ad->ad_startdate, 'awpcp-date' );
    $replacements['ad_postdate'] = awpcp_time( $ad->ad_postdate, 'awpcp-date' );
    $replacements['awpcpadpostdate'] = sprintf('%s<br/>', $replacements['ad_postdate']);

    return $replacements[$placeholder];
}


/**
 * @since 3.0
 */
function awpcp_do_placeholder_location($ad, $placeholder) {
    $replacements['city'] = stripslashes_deep($ad->ad_city);
    $replacements['state'] = stripslashes_deep($ad->ad_state);
    $replacements['village'] = stripslashes_deep($ad->ad_county_village);
    $replacements['country'] = stripslashes_deep($ad->ad_country);

    $replacements['county'] = $replacements['village'];

    $places = array();
    if (!empty($replacements['city'])) {
        $places[] = $replacements['city'];
    }
    if (!empty($replacements['village'])) {
        $places[] = $replacements['village'];
    }
    if (!empty($replacements['state'])) {
        $places[] = $replacements['state'];
    }
    if (!empty($replacements['country'])) {
        $places[] = $replacements['country'];
    }

    if (!empty($places)) {
        $replacements['location'] = sprintf('<br/><label>%s</label>: %s', __("Location","AWPCP"), join(', ', $places));
        $replacements['region'] = join(', ', $places);
    } else {
        $replacements['location'] = '';
        $replacements['region'] = '';
    }

    if (!empty($replacements['city'])) {
        $replacements['awpcp_city_display'] = sprintf('%s<br/>', $replacements['city']);
    } else {
        $replacements['awpcp_city_display'] = '';
    }

    if (!empty($replacements['state'])) {
        $replacements['awpcp_state_display'] = sprintf('%s<br/>', $replacements['state']);
    } else {
        $replacements['awpcp_state_display'] = '';
    }

    if (!empty($replacements['country'])) {
        $replacements['awpcp_country_display'] = sprintf('%s<br/>', $replacements['country']);
    } else {
        $replacements['awpcp_country_display'] = '';
    }

    return $replacements[$placeholder];
}


/**
 * @since 3.0
 */
function awpcp_do_placeholder_legacy_views($ad, $placeholder) {
    if (get_awpcp_option('displayadviews')) {
        // single ad
        $views = get_numtimesadviewd($ad->ad_id);
        $text = _n('This Ad has been viewed %d time.', 'This Ad has been viewed %d times.', $views, 'AWPCP');
        $replacements['awpcpadviews'] = sprintf('<div class="adviewed">%s</div>', sprintf($text, $views));

        // listings
        $content = sprintf(__('Total views: %d', 'AWPCP'), $views);
        $replacements['awpcp_display_adviews'] = sprintf('%s<br/>', $content);
    } else {
        $replacements['awpcpadviews'] = '';
        $replacements['awpcp_display_adviews'] = '';
    }

    return $replacements[$placeholder];
}


/**
 * @since 3.0
 */
function awpcp_do_placeholder_extra_fields($ad, $placeholder, $context) {
    global $hasextrafieldsmodule;

    if ($hasextrafieldsmodule == 1) {
        $single = $context === 'single' ? true : false;
        $replacements['awpcpextrafields'] = display_x_fields_data( $ad->ad_id, $single );
    } else {
        $replacements['awpcpextrafields'] = '';
    }

    $replacements['extra_fields'] = $replacements['awpcpextrafields'];

    return $replacements[$placeholder];
}


/**
 * @since 3.0
 */
function awpcp_do_placeholder_contact_url($ad, $placeholder) {
    return awpcp_get_reply_to_ad_url($ad->ad_id, $ad->ad_title);
}


/**
 * @since 3.0
 */
function awpcp_do_placeholder_contact_phone($ad, $placeholder) {
    if (!empty($ad->ad_contact_phone)) {
        $content = sprintf('<br/><label>%s</label>: %s', __('Phone', 'AWPCP'), $ad->ad_contact_phone);
        $replacements['adcontactphone'] = $content;
        $replacements['contact_phone'] = $ad->ad_contact_phone;
    } else {
        $replacements['adcontactphone'] = '';
        $replacements['contact_phone'] = '';
    }

    return $replacements[$placeholder];
}


/**
 * @since 3.0
 */
function awpcp_do_placeholder_adsense($ad, $placeholder) {
    static $replacements = array();

    if (isset($replacements[$ad->ad_id])) {
        return $replacements[$ad->ad_id][$placeholder];
    }

    if (get_awpcp_option('useadsense')) {
        $content = '<div class="cl-adsense">%s</div>';
        $placeholders['adsense'] = sprintf($content, get_awpcp_option('adsense'));
    } else {
        $placeholders['adsense'] = '';
    }

    $placeholders['showadsense1'] = '';
    $placeholders['showadsense2'] = '';
    $placeholders['showadsense3'] = '';

    switch (get_awpcp_option('adsenseposition')) {
        case 1:
            $placeholders['showadsense1'] = $placeholders['adsense'];
            break;
        case 2:
            $placeholders['showadsense2'] = $placeholders['adsense'];
            break;
        case 3:
            $placeholders['showadsense3'] = $placeholders['adsense'];
            break;
    }

    $replacements[$ad->ad_id] = $placeholders;

    return $replacements[$ad->ad_id][$placeholder];
}


/**
 * @since 3.0
 */
function awpcp_do_placeholder_flag_link($ad, $placeholder) {
    $content = '<a id="flag_ad_link" href="#" data-ad="%d">%s</a>';
    $replacements['flagad'] = sprintf($content, $ad->ad_id, __('Flag Ad', 'AWPCP'));
    $replacements['flag_link'] = $replacements['flagad'];

    return $replacements[$placeholder];
}


/**
 * @since 3.0
 */
function awpcp_do_placeholder_twitter_button($ad, $placeholder) {
    $url = add_query_arg(array(
        'url' => urlencode(url_showad($ad->ad_id)),
        'text' => urlencode($ad->get_title()),
    ), 'http://twitter.com/share');

    $button = '<div class="tw_button awpcp_tweet_button_div">';
    $button.= '<a href="' . $url . '" rel="nofollow" class="twitter-share-button" target="_blank">';
    $button.= __('Tweet This', 'AWPCP');
    $button.= '</a>';
    $button.= '</div>';

    return $button;
}


/**
 * @since 3.0
 */
function awpcp_do_placeholder_facebook_button($ad, $placeholder) {
    $info = awpcp_get_ad_share_info($ad->ad_id);

    $href = 'http://www.facebook.com/sharer.php?';
    $href.= 's=100';

    foreach ($info['images'] as $k => $image) {
        $href.= '&p[images][' . $k . ']=' . urlencode($image);
    }

    // put them after the image URLs to avoid conflict with lightbox plugins
    // https://github.com/drodenbaugh/awpcp/issues/310
    // http://www.awpcp.com/forum/viewtopic.php?f=4&t=3470&p=15358#p15358
    $href.= '&p[url]=' . urlencode($info['url']);
    $href.= '&p[title]=' . urlencode($ad->get_title());
    $href.= '&p[summary]=' . urlencode($info['description']);

    $button = '<div class="tw_button awpcp_tweet_button_div">';
    $button.= '<a href="%s" class="facebook-share-button" title="%s" target="_blank"></a>';
    $button.= '</div>';

    return sprintf($button, $href, __('Share on Facebook', 'AWPCP'));
}


/**
 * @since 3.0
 */
function awpcp_replace_content_placeholders($content, $replacements) {
    $placeholders = awpcp_content_placeholders();

    // make sure placeholders with longer names appear first.
    krsort($replacements);

    foreach ($replacements as $placeholder => $value) {
        if (!isset($placeholders[$placeholder])) continue;

        foreach ($placeholders[$placeholder]['aliases'] as $alias) {
            $content = str_replace("\${$alias}", "$value", $content);
        }
    }

    return $content;
}