quote source file quote-source.php

<?php
/*
Plugin Name: Quote Source
Plugin URI: http://raptor.hk/plugin-quote-source/
Description: Quote your article source at the end of your post.
Version: 1.0.6
Author: Raptor
Author URI: http://raptor.hk/
License: License: GPL v2 - http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
*/

define('QUOTE_SOURCE_VERSION', '1.0.6');
define('QUOTE_WORDPRESS_FOLDER',$_SERVER['DOCUMENT_ROOT']);
define('QUOTE_THEME_FOLDER',str_replace("\\",'/',dirname(__FILE__)));
define('QUOTE_THEME_PATH','/' . substr(QUOTE_THEME_FOLDER,stripos(QUOTE_THEME_FOLDER,'wp-content')));

add_action('admin_init','quote_source_init');
if(is_admin()) {
    require_once(dirname( __FILE__ ) . '/qs-admin.php');
}

function quote_source_init() {
    wp_enqueue_style('quote_source_css', QUOTE_THEME_PATH . '/custom/meta.css');
    foreach (array('post','page') as $type) {
        add_meta_box('quote_source_box', 'Quote up to 3 sources', 'quote_source_setup', $type, 'normal', 'high');
    }
    add_action('save_post','quote_source_save');

}

function quote_source_setup() {
    global $post;
    // get post metadata
    $meta = get_post_meta($post->ID,'_quote_source',TRUE);
    // include setup box
    require_once('custom/meta.php');
    // create a custom nonce
    echo '<input type="hidden" name="quote_source_noncename" value="' . wp_create_nonce(__FILE__) . '" />';
}

function quote_source_save($post_id) {
    // authentication checks
    // make sure data came from our meta box
    if (!wp_verify_nonce($_POST['quote_source_noncename'],__FILE__)) {
        return $post_id;
    }

    // check user permissions
    if ($_POST['post_type'] == 'page') {
        if (!current_user_can('edit_page', $post_id)) {
            return $post_id;
        }
    } else {
        if (!current_user_can('edit_post', $post_id)) {
            return $post_id;
        }
    }
    // authentication passed, save data
    // var types
    // single: _quote_source[var]
    // array: _quote_source[var][]
    // grouped array: _quote_source[var_group][0][var_1], _quote_source[var_group][0][var_2]
    $current_data = get_post_meta($post_id, '_quote_source', TRUE);
    $new_data = $_POST['_quote_source'];
    quote_source_clean($new_data);
    if ($current_data) {
        if (is_null($new_data)) {
            delete_post_meta($post_id,'_quote_source');
        } else {
            update_post_meta($post_id,'_quote_source',$new_data);
        }
    } elseif (!is_null($new_data)) {
        add_post_meta($post_id,'_quote_source',$new_data,TRUE);
    }
    return $post_id;
}

function quote_source_clean(&$arr) {
    if (is_array($arr)) {
        foreach ($arr as $i => $v) {
            if (is_array($arr[$i])) {
                quote_source_clean($arr[$i]);
                if (!count($arr[$i])) {
                    unset($arr[$i]);
                }
            } else {
                if (trim($arr[$i]) == '') {
                    unset($arr[$i]);
                }
            }
        }
        if (!count($arr)) {
            $arr = NULL;
        }
    }
}

function quote_source($content = '') {
    /*
    INPUT: the post contents
    OUTPUT: the post contents with quoted source at specified position & format
    */
    global $post;
    $meta = get_post_meta($post->ID,'_quote_source',TRUE);
    $quotes = array();

    $src_cnt = 0;
    for($i = 0; $i < 3; $i++) {
        $tmp_url = isset( $meta['quote' . ($i+1)] ) ? $meta['quote'. ($i+1)] : '';
        $tmp_title = isset( $meta['quote' . ($i+1) .'_title'] ) ? $meta['quote' . ($i+1) .'_title'] : '';
        if(!empty($tmp_url) || !empty($tmp_title)) {
            $quotes[$src_cnt] = array();
            $quotes[$src_cnt]['url'] = $tmp_url;
            $quotes[$src_cnt]['title'] = $tmp_title;
            $src_cnt++;
        }
    }
    if($src_cnt == 0) {
        return $content;
    }

    if((is_single()     && get_option('qs_mode_single_post', 'true')    == 'true') ||
        (is_category()  && get_option('qs_mode_category', 'false')      == 'true') ||
        (is_page()      && get_option('qs_mode_page', 'false')          == 'true') ||
        ((is_home() || is_archive() || is_paged()) && get_option('qs_mode_summary', 'false') == 'true')) {
        // count sources
        /*$src_cnt = 0;
        $src_selected = 0;
        if(!empty($s1_title) || !empty($s1)) {
            $src_selected = 1;
            $src_cnt++;
        }
        if(!empty($s2_title) || !empty($s2)) {
            $src_selected = 2;
            $src_cnt++;
        }
        if(!empty($s3_title) || !empty($s3)) {
            $src_selected = 3;
            $src_cnt++;
        }*/
        if($src_cnt == 1) {
            // have only 1 quote
            $content .= '<hr noshade="noshade" />';
            $selected_link = $quotes[0]['url'];
            $selected_title = $quotes[0]['title'];
            $content .= '<p style="color: #' . get_option('qs_text_color', '000000') . '"><strong>Source</strong> :</br> ';
            if(!empty($selected_title)) {
                if(!empty($selected_link)) {
                    $content .= '<a href="' . $selected_link . '" title="' . esc_attr( $selected_title ) . '" target="_blank">' . $selected_title . '</a>';
                } else {
                    $content .= $selected_title;
                }
                $content .= PHP_EOL;
            } elseif(!empty($selected_link)) {
                $content .= '<a href="' . $selected_link . '" target="_blank">' . $selected_link . '</a>' . PHP_EOL;
            }
            $content .= '</p>';

        } else {
            $display_mode = (int)get_option('qs_layout', 1);
            $content .= '<hr noshade="noshade" />';
            $content .= '<p style="color: #' . get_option('qs_text_color', '000000') . '"><strong>Sources :</strong>';
            switch($display_mode) {
                case 1:
                    $content .= '</br>';
                    $lines = array();
                    foreach($quotes as $quote) {
                        if(!empty($quote['title'])) {
                            if(!empty($quote['url'])) {
                                $lines[] = '<a href="' . $quote['url'] . '" title="' . esc_attr( $quote['title'] ) . '" target="_blank">' . $quote['title'] . '</a>' . PHP_EOL;
                            } else {
                                $lines[] = $quote['title'] . PHP_EOL;
                            }
                        } else {
                            $lines[] = '<a href="' . $quote['url'] . '" target="_blank">' . $quote['url'] . '</a>' . PHP_EOL;
                        }
                    }
                    $content .= implode('</br>', $lines);
                    $content .= '</p>';
                    break;
                case 2:
                    $content .= '</br>';
                    $lines = array();
                    foreach($quotes as $quote) {
                        if(!empty($quote['title'])) {
                            if(!empty($quote['url'])) {
                                $lines[] = $quote['title'] . ': <a href="' . $quote['url'] . '" title="' . esc_attr( $quote['title'] ) . '" target="_blank">' . $quote['url'] . '</a>' . PHP_EOL;
                            } else {
                                $lines[] = $quote['title'];
                            }
                        } else {
                            $lines[] = '<a href="' . $quote['url'] . '" target="_blank">' . $quote['url'] . '</a>' . PHP_EOL;
                        }
                    }
                    $content .= implode('<br />', $lines);
                    $content .= '</p>';
                    break;
                case 3:
                    $content .= '<ul>';
                    $lines = array();
                    foreach($quotes as $quote) {
                        if(!empty($quote['title'])) {
                            if(!empty($quote['url'])) {
                                $lines[] = '<li><a href="' . $quote['url'] . '" title="' . esc_attr( $quote['title'] ) . '" target="_blank">' . $quote['title'] . '</a></li>' . PHP_EOL;
                            } else {
                                $lines[] = '<li>' . $quote['title'] . '</li>' . PHP_EOL;
                            }
                        } else {
                            $lines[] = '<li><a href="' . $quote['url'] . '" target="_blank">' . $quote['url'] . '</a></li>' . PHP_EOL;
                        }
                    }
                    $content .= implode('', $lines);
                    $content .= '</ul></p>';
                    break;
            }
        }
    }
    return $content;
}
add_filter('the_content','quote_source');
?>