<?php
/*
Plugin Name: WP-PostViews
Plugin URI: https://lesterchan.net/portfolio/programming/php/
Description: Enables you to display how many times a post/page had been viewed.
Version: 1.74
Author: Lester 'GaMerZ' Chan
Author URI: https://lesterchan.net
Text Domain: wp-postviews
*/


/*
    Copyright 2016  Lester Chan  (email : lesterchan@gmail.com)

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/


### Create Text Domain For Translations
add_action( 'plugins_loaded', 'postviews_textdomain' );
function postviews_textdomain() {
    load_plugin_textdomain( 'wp-postviews', false, dirname( plugin_basename( __FILE__ ) ) );
}


### Function: Post Views Option Menu
add_action('admin_menu', 'postviews_menu');
function postviews_menu() {
    if (function_exists('add_options_page')) {
        add_options_page(__('PostViews', 'wp-postviews'), __('PostViews', 'wp-postviews'), 'manage_options', 'wp-postviews/postviews-options.php') ;
    }
}


### Function: Calculate Post Views
add_action( 'wp_head', 'process_postviews' );
function process_postviews() {
    global $user_ID, $post;
    if( is_int( $post ) ) {
        $post = get_post( $post );
    }
    if( ! wp_is_post_revision( $post ) && ! is_preview() ) {
        if( is_single() || is_page() ) {
            $id = intval( $post->ID );
            $views_options = get_option( 'views_options' );
            if ( !$post_views = get_post_meta( $post->ID, 'views', true ) ) {
                $post_views = 0;
            }
            $should_count = false;
            switch( intval( $views_options['count'] ) ) {
                case 0:
                    $should_count = true;
                    break;
                case 1:
                    if(empty( $_COOKIE[USER_COOKIE] ) && intval( $user_ID ) === 0) {
                        $should_count = true;
                    }
                    break;
                case 2:
                    if( intval( $user_ID ) > 0 ) {
                        $should_count = true;
                    }
                    break;
            }
            if( intval( $views_options['exclude_bots'] ) === 1 ) {
                $bots = array
                (
                    'Google Bot' => 'google'
                    , 'MSN' => 'msnbot'
                    , 'Alex' => 'ia_archiver'
                    , 'Lycos' => 'lycos'
                    , 'Ask Jeeves' => 'jeeves'
                    , 'Altavista' => 'scooter'
                    , 'AllTheWeb' => 'fast-webcrawler'
                    , 'Inktomi' => 'slurp@inktomi'
                    , 'Turnitin.com' => 'turnitinbot'
                    , 'Technorati' => 'technorati'
                    , 'Yahoo' => 'yahoo'
                    , 'Findexa' => 'findexa'
                    , 'NextLinks' => 'findlinks'
                    , 'Gais' => 'gaisbo'
                    , 'WiseNut' => 'zyborg'
                    , 'WhoisSource' => 'surveybot'
                    , 'Bloglines' => 'bloglines'
                    , 'BlogSearch' => 'blogsearch'
                    , 'PubSub' => 'pubsub'
                    , 'Syndic8' => 'syndic8'
                    , 'RadioUserland' => 'userland'
                    , 'Gigabot' => 'gigabot'
                    , 'Become.com' => 'become.com'
                    , 'Baidu' => 'baiduspider'
                    , 'so.com' => '360spider'
                    , 'Sogou' => 'spider'
                    , 'soso.com' => 'sosospider'
                    , 'Yandex' => 'yandex'
                );
                $useragent = isset( $_SERVER['HTTP_USER_AGENT'] ) ? $_SERVER['HTTP_USER_AGENT'] : '';
                foreach ( $bots as $name => $lookfor ) {
                    if ( ! empty( $useragent ) && ( stristr( $useragent, $lookfor ) !== false ) ) {
                        $should_count = false;
                        break;
                    }
                }
            }
            if( $should_count && ( ( isset( $views_options['use_ajax'] ) && intval( $views_options['use_ajax'] ) === 0 ) || ( !defined( 'WP_CACHE' ) || !WP_CACHE ) ) ) {
                update_post_meta( $id, 'views', ( $post_views + 1 ) );
                do_action( 'postviews_increment_views', ( $post_views + 1 ) );
            }
        }
    }
}


### Function: Calculate Post Views With WP_CACHE Enabled
add_action('wp_enqueue_scripts', 'wp_postview_cache_count_enqueue');
function wp_postview_cache_count_enqueue() {
    global $user_ID, $post;

    if( !defined( 'WP_CACHE' ) || !WP_CACHE )
        return;

    $views_options = get_option( 'views_options' );

    if( isset( $views_options['use_ajax'] ) && intval( $views_options['use_ajax'] ) === 0 )
        return;

    if ( !wp_is_post_revision( $post ) && ( is_single() || is_page() ) ) {
        $should_count = false;
        switch( intval( $views_options['count'] ) ) {
            case 0:
                $should_count = true;
                break;
            case 1:
                if ( empty( $_COOKIE[USER_COOKIE] ) && intval( $user_ID ) === 0) {
                    $should_count = true;
                }
                break;
            case 2:
                if ( intval( $user_ID ) > 0 ) {
                    $should_count = true;
                }
                break;
        }
        if ( $should_count ) {
            wp_enqueue_script( 'wp-postviews-cache', plugins_url( 'postviews-cache.js', __FILE__ ), array( 'jquery' ), '1.68', true );
            wp_localize_script( 'wp-postviews-cache', 'viewsCacheL10n', array( 'admin_ajax_url' => admin_url( 'admin-ajax.php' ), 'post_id' => intval( $post->ID ) ) );
        }
    }
}


### Function: Determine If Post Views Should Be Displayed (By: David Potter)
function should_views_be_displayed($views_options = null) {
    if ($views_options == null) {
        $views_options = get_option('views_options');
    }
    $display_option = 0;
    if (is_home()) {
        if (array_key_exists('display_home', $views_options)) {
            $display_option = $views_options['display_home'];
        }
    } elseif (is_single()) {
        if (array_key_exists('display_single', $views_options)) {
            $display_option = $views_options['display_single'];
        }
    } elseif (is_page()) {
        if (array_key_exists('display_page', $views_options)) {
            $display_option = $views_options['display_page'];
        }
    } elseif (is_archive()) {
        if (array_key_exists('display_archive', $views_options)) {
            $display_option = $views_options['display_archive'];
        }
    } elseif (is_search()) {
        if (array_key_exists('display_search', $views_options)) {
            $display_option = $views_options['display_search'];
        }
    } else {
        if (array_key_exists('display_other', $views_options)) {
            $display_option = $views_options['display_other'];
        }
    }
    return (($display_option == 0) || (($display_option == 1) && is_user_logged_in()));
}


### Function: Display The Post Views
function the_views($display = true, $prefix = '', $postfix = '', $always = false) {
    $post_views = intval( get_post_meta( get_the_ID(), 'views', true ) );
    $views_options = get_option('views_options');
    if ($always || should_views_be_displayed($views_options)) {
        $output = $prefix.str_replace( array( '%VIEW_COUNT%', '%VIEW_COUNT_ROUNDED%' ), array( number_format_i18n( $post_views ), postviews_round_number( $post_views) ), stripslashes( $views_options['template'] ) ).$postfix;
        if($display) {
            echo apply_filters('the_views', $output);
        } else {
            return apply_filters('the_views', $output);
        }
    }
    elseif (!$display) {
        return '';
    }
}

### Function: Short Code For Inserting Views Into Posts
add_shortcode( 'views', 'views_shortcode' );
function views_shortcode( $atts ) {
    $attributes = shortcode_atts( array( 'id' => 0 ), $atts );
    $id = intval( $attributes['id'] );
    if( $id === 0) {
        $id = get_the_ID();
    }
    $views_options = get_option( 'views_options' );
    $post_views = intval( get_post_meta( $id, 'views', true ) );
    $output = str_replace( array( '%VIEW_COUNT%', '%VIEW_COUNT_ROUNDED%' ), array( number_format_i18n( $post_views ), postviews_round_number( $post_views) ), stripslashes( $views_options['template'] ) );

    return apply_filters( 'the_views', $output );
}


### Function: Display Least Viewed Page/Post
if(!function_exists('get_least_viewed')) {
    function get_least_viewed($mode = '', $limit = 10, $chars = 0, $display = true) {
        global $wpdb;
        $views_options = get_option('views_options');
        $where = '';
        $temp = '';
        $output = '';
        if(!empty($mode) && $mode != 'both') {
            if(is_array($mode)) {
                $mode = implode("','",$mode);
                $where = "post_type IN ('".$mode."')";
            } else {
                $where = "post_type = '$mode'";
            }
        } else {
            $where = '1=1';
        }
       $most_viewed = $wpdb->get_results("SELECT DISTINCT p.*, (pm1.meta_value+0) AS views, IF((pm2.meta_value IS NULL) OR (pm2.meta_value = ''), tt.term_id, pm2.meta_value) AS cat_id FROM $wpdb->posts p LEFT JOIN $wpdb->postmeta pm1 ON pm1.post_id = p.ID LEFT JOIN $wpdb->postmeta pm2 ON (pm2.post_id = p.ID AND pm2.meta_key='_yoast_wpseo_primary_category') INNER JOIN $wpdb->term_relationships tr ON (p.ID = tr.object_id) LEFT JOIN $wpdb->term_taxonomy tt ON (tr.term_taxonomy_id = tt.term_taxonomy_id AND tt.taxonomy = 'category') WHERE post_date < '".current_time('mysql')."' AND $where AND  post_status = 'publish' AND pm1.meta_key = 'views' AND post_password = '' GROUP BY p.ID ORDER BY views ASC LIMIT $limit");
       if($most_viewed) {
            foreach ($most_viewed as $post) {
                $post_views = intval($post->views);
                $post_title = get_the_title($post);
                if($chars > 0) {
                    $post_title = snippet_text($post_title, $chars);
                }
                $post_excerpt = views_post_excerpt($post->post_excerpt, $post->post_content, $post->post_password, $chars);
                $thumbnail = get_the_post_thumbnail($post->ID,'thumbnail',true);
                $temp = stripslashes($views_options['most_viewed_template']);
                $temp = str_replace('%VIEW_COUNT%', number_format_i18n($post_views), $temp);
                $temp = str_replace('%VIEW_COUNT_ROUNDED%', postviews_round_number( $post_views ), $temp);
                $temp = str_replace('%POST_TITLE%', $post_title, $temp);
                $temp = str_replace('%POST_EXCERPT%', $post_excerpt, $temp);
                $temp = str_replace('%POST_CONTENT%', $post->post_content, $temp);
                $temp = str_replace('%POST_URL%', get_permalink($post), $temp);
                $temp = str_replace('%POST_DATE%', get_the_time(get_option('date_format'), $post), $temp);
                $temp = str_replace('%POST_TIME%', get_the_time(get_option('time_format'), $post), $temp);
                $temp = str_replace('%POST_THUMBNAIL%', $thumbnail, $temp);
                $temp = str_replace('%POST_CATEGORY_ID%', $post->cat_id, $temp);
                $output .= $temp;
            }
        } else {
            $output = '<li>'.__('N/A', 'wp-postviews').'</li>'."\n";
        }
        if($display) {
            echo $output;
        } else {
            return $output;
        }
    }
}


### Function: Display Most Viewed Page/Post
if(!function_exists('get_most_viewed')) {
    function get_most_viewed($mode = '', $limit = 10, $chars = 0, $display = true) {
        global $wpdb;
        $views_options = get_option('views_options');
        $where = '';
        $temp = '';
        $output = '';
        if(!empty($mode) && $mode != 'both') {
            if(is_array($mode)) {
                $mode = implode("','",$mode);
                $where = "post_type IN ('".$mode."')";
            } else {
                $where = "post_type = '$mode'";
            }
        } else {
            $where = '1=1';
        }
        $most_viewed = $wpdb->get_results("SELECT DISTINCT p.*, (pm1.meta_value+0) AS views, IF((pm2.meta_value IS NULL) OR (pm2.meta_value = ''), tt.term_id, pm2.meta_value) AS cat_id FROM $wpdb->posts p LEFT JOIN $wpdb->postmeta pm1 ON pm1.post_id = p.ID LEFT JOIN $wpdb->postmeta pm2 ON (pm2.post_id = p.ID AND pm2.meta_key='_yoast_wpseo_primary_category') INNER JOIN $wpdb->term_relationships tr ON (p.ID = tr.object_id) LEFT JOIN $wpdb->term_taxonomy tt ON (tr.term_taxonomy_id = tt.term_taxonomy_id AND tt.taxonomy = 'category') WHERE post_date < '".current_time('mysql')."' AND $where AND  post_status = 'publish' AND pm1.meta_key = 'views' AND post_password = '' GROUP BY p.ID ORDER BY views DESC LIMIT $limit");
        if($most_viewed) {
            foreach ($most_viewed as $post) {
                $post_views = intval($post->views);
                $post_title = get_the_title($post);
                if($chars > 0) {
                    $post_title = snippet_text($post_title, $chars);
                }
                $post_excerpt = views_post_excerpt($post->post_excerpt, $post->post_content, $post->post_password, $chars);
                $thumbnail = get_the_post_thumbnail($post->ID,'thumbnail',true);
                $temp = stripslashes($views_options['most_viewed_template']);
                $temp = str_replace('%VIEW_COUNT%', number_format_i18n($post_views), $temp);
                $temp = str_replace('%VIEW_COUNT_ROUNDED%', postviews_round_number( $post_views ), $temp);
                $temp = str_replace('%POST_TITLE%', $post_title, $temp);
                $temp = str_replace('%POST_EXCERPT%', $post_excerpt, $temp);
                $temp = str_replace('%POST_CONTENT%', $post->post_content, $temp);
                $temp = str_replace('%POST_URL%', get_permalink($post), $temp);
                $temp = str_replace('%POST_DATE%', get_the_time(get_option('date_format'), $post), $temp);
                $temp = str_replace('%POST_TIME%', get_the_time(get_option('time_format'), $post), $temp);
                $temp = str_replace('%POST_THUMBNAIL%', $thumbnail, $temp);
                $temp = str_replace('%POST_CATEGORY_ID%', $post->cat_id, $temp);
                $output .= $temp;
            }
        } else {
            $output = '<li>'.__('N/A', 'wp-postviews').'</li>'."\n";
        }
        if($display) {
            echo $output;
        } else {
            return $output;
        }
    }
}


### Function: Display Least Viewed Page/Post By Category ID
if(!function_exists('get_least_viewed_category')) {
    function get_least_viewed_category($category_id = 0, $mode = '', $limit = 10, $chars = 0, $display = true) {
        global $wpdb;
        $views_options = get_option('views_options');
        $where = '';
        $temp = '';
        $output = '';
        if(is_array($category_id)) {
            $category_sql = 'tt.term_id IN ('.join(',', $category_id).')';
        } else {
            $category_sql = "tt.term_id = $category_id";
        }
        if(!empty($mode) && $mode != 'both') {
            if(is_array($mode)) {
                $mode = implode("','",$mode);
                $where = "post_type IN ('".$mode."')";
            } else {
                $where = "post_type = '$mode'";
            }
        } else {
            $where = '1=1';
        }
        $most_viewed = $wpdb->get_results("SELECT DISTINCT p.*, (pm1.meta_value+0) AS views, IF((pm2.meta_value IS NULL) OR (pm2.meta_value = ''), tt.term_id, pm2.meta_value) AS cat_id FROM $wpdb->posts p LEFT JOIN $wpdb->postmeta pm1 ON pm1.post_id = p.ID LEFT JOIN $wpdb->postmeta pm2 ON (pm2.post_id = p.ID AND pm2.meta_key='_yoast_wpseo_primary_category') INNER JOIN $wpdb->term_relationships tr ON (p.ID = tr.object_id) INNER JOIN $wpdb->term_taxonomy tt ON (tr.term_taxonomy_id = tt.term_taxonomy_id AND tt.taxonomy = 'category' AND $category_sql) WHERE post_date < '".current_time('mysql')."' AND $where AND  post_status = 'publish' AND pm1.meta_key = 'views' AND post_password = '' GROUP BY p.ID ORDER BY views ASC LIMIT $limit");
        if($most_viewed) {
            foreach ($most_viewed as $post) {
                $post_views = intval($post->views);
                $post_title = get_the_title($post);
                if($chars > 0) {
                    $post_title = snippet_text($post_title, $chars);
                }
                $thumbnail = get_the_post_thumbnail($post->ID,'thumbnail',true);
                $post_excerpt = views_post_excerpt($post->post_excerpt, $post->post_content, $post->post_password, $chars);
                $temp = stripslashes($views_options['most_viewed_template']);
                $temp = str_replace('%VIEW_COUNT%', number_format_i18n($post_views), $temp);
                $temp = str_replace('%POST_TITLE%', $post_title, $temp);
                $temp = str_replace('%POST_EXCERPT%', $post_excerpt, $temp);
                $temp = str_replace('%POST_CONTENT%', $post->post_content, $temp);
                $temp = str_replace('%POST_URL%', get_permalink($post), $temp);
                $temp = str_replace('%POST_DATE%', get_the_time(get_option('date_format'), $post), $temp);
                $temp = str_replace('%POST_TIME%', get_the_time(get_option('time_format'), $post), $temp);
                $temp = str_replace('%POST_THUMBNAIL%', $thumbnail, $temp);
                $temp = str_replace('%POST_CATEGORY_ID%', $post->cat_id, $temp);
                $output .= $temp;
            }
        } else {
            $output = '<li>'.__('N/A', 'wp-postviews').'</li>'."\n";
        }
        if($display) {
            echo $output;
        } else {
            return $output;
        }
    }
}


### Function: Display Most Viewed Page/Post By Category ID
if(!function_exists('get_most_viewed_category')) {
    function get_most_viewed_category($category_id = 0, $mode = '', $limit = 10, $chars = 0, $display = true) {
        global $wpdb;
        $views_options = get_option('views_options');
        $where = '';
        $temp = '';
        $output = '';
        if(is_array($category_id)) {
            $category_sql = 'tt.term_id IN ('.join(',', $category_id).')';
        } else {
            $category_sql = "tt.term_id = $category_id";
        }
        if(!empty($mode) && $mode != 'both') {
            if(is_array($mode)) {
                $mode = implode("','",$mode);
                $where = "post_type IN ('".$mode."')";
            } else {
                $where = "post_type = '$mode'";
            }
        } else {
            $where = '1=1';
        }
        $most_viewed = $wpdb->get_results("SELECT DISTINCT p.*, (pm1.meta_value+0) AS views, IF((pm2.meta_value IS NULL) OR (pm2.meta_value = ''), tt.term_id, pm2.meta_value) AS cat_id FROM $wpdb->posts p LEFT JOIN $wpdb->postmeta pm1 ON pm1.post_id = p.ID LEFT JOIN $wpdb->postmeta pm2 ON (pm2.post_id = p.ID AND pm2.meta_key='_yoast_wpseo_primary_category') INNER JOIN $wpdb->term_relationships tr ON (p.ID = tr.object_id) INNER JOIN $wpdb->term_taxonomy tt ON (tr.term_taxonomy_id = tt.term_taxonomy_id AND tt.taxonomy = 'category' AND $category_sql) WHERE post_date < '".current_time('mysql')."' AND $where AND  post_status = 'publish' AND pm1.meta_key = 'views' AND post_password = '' GROUP BY p.ID ORDER BY views DESC LIMIT $limit");
        if($most_viewed) {
            foreach ($most_viewed as $post) {
                $post_views = intval($post->views);
                $post_title = get_the_title($post);
                if($chars > 0) {
                    $post_title = snippet_text($post_title, $chars);
                }
                $thumbnail = get_the_post_thumbnail($post->ID,'thumbnail',true);
                $post_excerpt = views_post_excerpt($post->post_excerpt, $post->post_content, $post->post_password, $chars);
                $temp = stripslashes($views_options['most_viewed_template']);
                $temp = str_replace('%VIEW_COUNT%', number_format_i18n($post_views), $temp);
                $temp = str_replace('%POST_TITLE%', $post_title, $temp);
                $temp = str_replace('%POST_EXCERPT%', $post_excerpt, $temp);
                $temp = str_replace('%POST_CONTENT%', $post->post_content, $temp);
                $temp = str_replace('%POST_URL%', get_permalink($post), $temp);
                $temp = str_replace('%POST_DATE%', get_the_time(get_option('date_format'), $post), $temp);
                $temp = str_replace('%POST_TIME%', get_the_time(get_option('time_format'), $post), $temp);
                $temp = str_replace('%POST_THUMBNAIL%', $thumbnail, $temp);
                $temp = str_replace('%POST_CATEGORY_ID%', $post->cat_id, $temp);
                $output .= $temp;
            }
        } else {
            $output = '<li>'.__('N/A', 'wp-postviews').'</li>'."\n";
        }
        if($display) {
            echo $output;
        } else {
            return $output;
        }
    }
}


### Function: Display Most Viewed Page/Post By Tag ID
if(!function_exists('get_most_viewed_tag')) {
    function get_most_viewed_tag($tag_id = 0, $mode = '', $limit = 10, $chars = 0, $display = true) {
        global $wpdb;
        $views_options = get_option('views_options');
        $where = '';
        $temp = '';
        $output = '';
        if(is_array($tag_id)) {
            $tag_sql = 'tt.term_id IN ('.join(',', $tag_id).')';
        } else {
            $tag_sql = "tt.term_id = $tag_id";
        }
        if(!empty($mode) && $mode != 'both') {
            if(is_array($mode)) {
                $mode = implode("','",$mode);
                $where = "post_type IN ('".$mode."')";
            } else {
                $where = "post_type = '$mode'";
            }
        } else {
            $where = '1=1';
        }
        $most_viewed = $wpdb->get_results("SELECT DISTINCT p.*, (pm1.meta_value+0) AS views, IF((pm2.meta_value IS NULL) OR (pm2.meta_value = ''), tt2.term_id, pm2.meta_value) AS cat_id FROM $wpdb->posts p LEFT JOIN $wpdb->postmeta pm1 ON pm1.post_id = p.ID LEFT JOIN $wpdb->postmeta pm2 ON (pm2.post_id = p.ID AND pm2.meta_key='_yoast_wpseo_primary_category') INNER JOIN $wpdb->term_relationships tr ON (p.ID = tr.object_id) INNER JOIN $wpdb->term_taxonomy tt ON (tr.term_taxonomy_id = tt.term_taxonomy_id AND tt.taxonomy = 'post_tag' AND $tag_sql) INNER JOIN $wpdb->term_relationships tr2 ON (p.ID = tr2.object_id) LEFT JOIN $wpdb->term_taxonomy tt2 ON (tr2.term_taxonomy_id = tt2.term_taxonomy_id AND tt2.taxonomy = 'category') WHERE post_date < '".current_time('mysql')."' AND $where AND post_status = 'publish' AND pm1.meta_key = 'views' AND post_password = '' GROUP BY p.ID ORDER BY views DESC LIMIT $limit");
        if($most_viewed) {
            foreach ($most_viewed as $post) {
                $post_views = intval($post->views);
                $post_title = get_the_title($post);
                if($chars > 0) {
                    $post_title = snippet_text($post_title, $chars);
                }
                $thumbnail = get_the_post_thumbnail($post->ID,'thumbnail',true);
                $post_excerpt = views_post_excerpt($post->post_excerpt, $post->post_content, $post->post_password, $chars);
                $temp = stripslashes($views_options['most_viewed_template']);
                $temp = str_replace('%VIEW_COUNT%', number_format_i18n($post_views), $temp);
                $temp = str_replace('%POST_TITLE%', $post_title, $temp);
                $temp = str_replace('%POST_EXCERPT%', $post_excerpt, $temp);
                $temp = str_replace('%POST_CONTENT%', $post->post_content, $temp);
                $temp = str_replace('%POST_URL%', get_permalink($post), $temp);
                $temp = str_replace('%POST_DATE%', get_the_time(get_option('date_format'), $post), $temp);
                $temp = str_replace('%POST_TIME%', get_the_time(get_option('time_format'), $post), $temp);
                $temp = str_replace('%POST_THUMBNAIL%', $thumbnail, $temp);
                $temp = str_replace('%POST_CATEGORY_ID%', $post->cat_id, $temp);
                $output .= $temp;
            }
        } else {
            $output = '<li>'.__('N/A', 'wp-postviews').'</li>'."\n";
        }
        if($display) {
            echo $output;
        } else {
            return $output;
        }
    }
}


### Function: Display Least Viewed Page/Post By Tag ID
if(!function_exists('get_least_viewed_tag')) {
    function get_least_viewed_tag($tag_id = 0, $mode = '', $limit = 10, $chars = 0, $display = true) {
        global $wpdb;
        $views_options = get_option('views_options');
        $where = '';
        $temp = '';
        $output = '';
        if(is_array($tag_id)) {
            $tag_sql = 'tt.term_id IN ('.join(',', $tag_id).')';
        } else {
            $tag_sql = "tt.term_id = $tag_id";
        }
        if(!empty($mode) && $mode != 'both') {
            if(is_array($mode)) {
                $mode = implode("','",$mode);
                $where = "post_type IN ('".$mode."')";
            } else {
                $where = "post_type = '$mode'";
            }
        } else {
            $where = '1=1';
        }
        $most_viewed = $wpdb->get_results("SELECT DISTINCT p.*, (pm1.meta_value+0) AS views, IF((pm2.meta_value IS NULL) OR (pm2.meta_value = ''), tt2.term_id, pm2.meta_value) AS cat_id FROM $wpdb->posts p LEFT JOIN $wpdb->postmeta pm1 ON pm1.post_id = p.ID LEFT JOIN $wpdb->postmeta pm2 ON (pm2.post_id = p.ID AND pm2.meta_key='_yoast_wpseo_primary_category') INNER JOIN $wpdb->term_relationships tr ON (p.ID = tr.object_id) INNER JOIN $wpdb->term_taxonomy tt ON (tr.term_taxonomy_id = tt.term_taxonomy_id AND tt.taxonomy = 'post_tag' AND $tag_sql) INNER JOIN $wpdb->term_relationships tr2 ON (p.ID = tr2.object_id) LEFT JOIN $wpdb->term_taxonomy tt2 ON (tr2.term_taxonomy_id = tt2.term_taxonomy_id AND tt2.taxonomy = 'category') WHERE post_date < '".current_time('mysql')."' AND $where AND post_status = 'publish' AND pm1.meta_key = 'views' AND post_password = '' GROUP BY p.ID ORDER BY views ASC LIMIT $limit");
        if($most_viewed) {
            foreach ($most_viewed as $post) {
                $post_views = intval($post->views);
                $post_title = get_the_title($post);
                if($chars > 0) {
                    $post_title = snippet_text($post_title, $chars);
                }
                $thumbnail = get_the_post_thumbnail($post->ID,'thumbnail',true);
                $post_excerpt = views_post_excerpt($post->post_excerpt, $post->post_content, $post->post_password, $chars);
                $temp = stripslashes($views_options['most_viewed_template']);
                $temp = str_replace('%VIEW_COUNT%', number_format_i18n($post_views), $temp);
                $temp = str_replace('%POST_TITLE%', $post_title, $temp);
                $temp = str_replace('%POST_EXCERPT%', $post_excerpt, $temp);
                $temp = str_replace('%POST_CONTENT%', $post->post_content, $temp);
                $temp = str_replace('%POST_URL%', get_permalink($post), $temp);
                $temp = str_replace('%POST_DATE%', get_the_time(get_option('date_format'), $post), $temp);
                $temp = str_replace('%POST_TIME%', get_the_time(get_option('time_format'), $post), $temp);
                $temp = str_replace('%POST_THUMBNAIL%', $thumbnail, $temp);
                $temp = str_replace('%POST_CATEGORY_ID%', $post->cat_id, $temp);
                $output .= $temp;
            }
        } else {
            $output = '<li>'.__('N/A', 'wp-postviews').'</li>'."\n";
        }
        if($display) {
            echo $output;
        } else {
            return $output;
        }
    }
}


### Function: Display Total Views
if(!function_exists('get_totalviews')) {
    function get_totalviews($display = true) {
        global $wpdb;
        $total_views = intval($wpdb->get_var("SELECT SUM(meta_value+0) FROM $wpdb->postmeta WHERE meta_key = 'views'"));
        if($display) {
            echo number_format_i18n($total_views);
        } else {
            return $total_views;
        }
    }
}


### Function: Snippet Text
if(!function_exists('snippet_text')) {
    function snippet_text($text, $length = 0) {
        if (defined('MB_OVERLOAD_STRING')) {
          $text = @html_entity_decode($text, ENT_QUOTES, get_option('blog_charset'));
             if (mb_strlen($text) > $length) {
                return htmlentities(mb_substr($text,0,$length), ENT_COMPAT, get_option('blog_charset')).'...';
             } else {
                return htmlentities($text, ENT_COMPAT, get_option('blog_charset'));
             }
        } else {
            $text = @html_entity_decode($text, ENT_QUOTES, get_option('blog_charset'));
             if (strlen($text) > $length) {
                return htmlentities(substr($text,0,$length), ENT_COMPAT, get_option('blog_charset')).'...';
             } else {
                return htmlentities($text, ENT_COMPAT, get_option('blog_charset'));
             }
        }
    }
}


### Function: Process Post Excerpt, For Some Reasons, The Default get_post_excerpt() Does Not Work As Expected
function views_post_excerpt($post_excerpt, $post_content, $post_password, $chars = 200) {
    if(!empty($post_password)) {
        if(!isset($_COOKIE['wp-postpass_'.COOKIEHASH]) || $_COOKIE['wp-postpass_'.COOKIEHASH] != $post_password) {
            return __('There is no excerpt because this is a protected post.', 'wp-postviews');
        }
    }
    if(empty($post_excerpt)) {
        return snippet_text(strip_tags($post_content), $chars);
    } else {
        return $post_excerpt;
    }
}


### Function: Modify Default WordPress Listing To Make It Sorted By Post Views
function views_fields($content) {
    global $wpdb;
    $content .= ", ($wpdb->postmeta.meta_value+0) AS views";
    return $content;
}
function views_join($content) {
    global $wpdb;
    $content .= " LEFT JOIN $wpdb->postmeta ON $wpdb->postmeta.post_id = $wpdb->posts.ID";
    return $content;
}
function views_where($content) {
    global $wpdb;
    $content .= " AND $wpdb->postmeta.meta_key = 'views'";
    return $content;
}
function views_orderby($content) {
    $orderby = trim(addslashes(get_query_var('v_orderby')));
    if(empty($orderby) || ($orderby != 'asc' && $orderby != 'desc')) {
        $orderby = 'desc';
    }
    $content = " views $orderby";
    return $content;
}


### Function: Add Views Custom Fields
add_action('publish_post', 'add_views_fields');
add_action('publish_page', 'add_views_fields');
function add_views_fields($post_ID) {
    global $wpdb;
    if(!wp_is_post_revision($post_ID)) {
        add_post_meta($post_ID, 'views', 0, true);
    }
}


### Function: Views Public Variables
add_filter('query_vars', 'views_variables');
function views_variables($public_query_vars) {
    $public_query_vars[] = 'v_sortby';
    $public_query_vars[] = 'v_orderby';
    return $public_query_vars;
}


### Function: Sort Views Posts
add_action('pre_get_posts', 'views_sorting');
function views_sorting($local_wp_query) {
    if($local_wp_query->get('v_sortby') == 'views') {
        add_filter('posts_fields', 'views_fields');
        add_filter('posts_join', 'views_join');
        add_filter('posts_where', 'views_where');
        add_filter('posts_orderby', 'views_orderby');
    } else {
        remove_filter('posts_fields', 'views_fields');
        remove_filter('posts_join', 'views_join');
        remove_filter('posts_where', 'views_where');
        remove_filter('posts_orderby', 'views_orderby');
    }
}


### Function: Plug Into WP-Stats
add_action( 'plugins_loaded', 'postviews_wp_stats' );
function postviews_wp_stats() {
    add_filter( 'wp_stats_page_admin_plugins', 'postviews_page_admin_general_stats' );
    add_filter( 'wp_stats_page_admin_most', 'postviews_page_admin_most_stats' );
    add_filter( 'wp_stats_page_plugins', 'postviews_page_general_stats' );
    add_filter( 'wp_stats_page_most', 'postviews_page_most_stats' );
}


### Function: Add WP-PostViews General Stats To WP-Stats Page Options
function postviews_page_admin_general_stats($content) {
    $stats_display = get_option('stats_display');
    if($stats_display['views'] == 1) {
        $content .= '<input type="checkbox" name="stats_display[]" id="wpstats_views" value="views" checked="checked" />&nbsp;&nbsp;<label for="wpstats_views">'.__('WP-PostViews', 'wp-postviews').'</label><br />'."\n";
    } else {
        $content .= '<input type="checkbox" name="stats_display[]" id="wpstats_views" value="views" />&nbsp;&nbsp;<label for="wpstats_views">'.__('WP-PostViews', 'wp-postviews').'</label><br />'."\n";
    }
    return $content;
}


### Function: Add WP-PostViews Top Most/Highest Stats To WP-Stats Page Options
function postviews_page_admin_most_stats($content) {
    $stats_display = get_option('stats_display');
    $stats_mostlimit = intval(get_option('stats_mostlimit'));
    if($stats_display['viewed_most_post'] == 1) {
        $content .= '<input type="checkbox" name="stats_display[]" id="wpstats_viewed_most_post" value="viewed_most_post" checked="checked" />&nbsp;&nbsp;<label for="wpstats_viewed_most_post">'.sprintf(_n('%s Most Viewed Post', '%s Most Viewed Posts', $stats_mostlimit, 'wp-postviews'), number_format_i18n($stats_mostlimit)).'</label><br />'."\n";
    } else {
        $content .= '<input type="checkbox" name="stats_display[]" id="wpstats_viewed_most_post" value="viewed_most_post" />&nbsp;&nbsp;<label for="wpstats_viewed_most_post">'.sprintf(_n('%s Most Viewed Post', '%s Most Viewed Posts', $stats_mostlimit, 'wp-postviews'), number_format_i18n($stats_mostlimit)).'</label><br />'."\n";
    }
    if($stats_display['viewed_most_page'] == 1) {
        $content .= '<input type="checkbox" name="stats_display[]" id="wpstats_viewed_most_page" value="viewed_most_page" checked="checked" />&nbsp;&nbsp;<label for="wpstats_viewed_most_page">'.sprintf(_n('%s Most Viewed Page', '%s Most Viewed Pages', $stats_mostlimit, 'wp-postviews'), number_format_i18n($stats_mostlimit)).'</label><br />'."\n";
    } else {
        $content .= '<input type="checkbox" name="stats_display[]" id="wpstats_viewed_most_page" value="viewed_most_page" />&nbsp;&nbsp;<label for="wpstats_viewed_most_page">'.sprintf(_n('%s Most Viewed Page', '%s Most Viewed Pages', $stats_mostlimit, 'wp-postviews'), number_format_i18n($stats_mostlimit)).'</label><br />'."\n";
    }
    return $content;
}


### Function: Add WP-PostViews General Stats To WP-Stats Page
function postviews_page_general_stats($content) {
    $stats_display = get_option('stats_display');
    if($stats_display['views'] == 1) {
        $content .= '<p><strong>'.__('WP-PostViews', 'wp-postviews').'</strong></p>'."\n";
        $content .= '<ul>'."\n";
        $content .= '<li>'.sprintf(_n('<strong>%s</strong> view was generated.', '<strong>%s</strong> views were generated.', get_totalviews(false), 'wp-postviews'), number_format_i18n(get_totalviews(false))).'</li>'."\n";
        $content .= '</ul>'."\n";
    }
    return $content;
}


### Function: Add WP-PostViews Top Most/Highest Stats To WP-Stats Page
function postviews_page_most_stats($content) {
    $stats_display = get_option('stats_display');
    $stats_mostlimit = intval(get_option('stats_mostlimit'));
    if($stats_display['viewed_most_post'] == 1) {
        $content .= '<p><strong>'.sprintf(_n('%s Most Viewed Post', '%s Most Viewed Posts', $stats_mostlimit, 'wp-postviews'), number_format_i18n($stats_mostlimit)).'</strong></p>'."\n";
        $content .= '<ul>'."\n";
        $content .= get_most_viewed('post', $stats_mostlimit, 0, false);
        $content .= '</ul>'."\n";
    }
    if($stats_display['viewed_most_page'] == 1) {
        $content .= '<p><strong>'.sprintf(_n('%s Most Viewed Page', '%s Most Viewed Pages', $stats_mostlimit, 'wp-postviews'), number_format_i18n($stats_mostlimit)).'</strong></p>'."\n";
        $content .= '<ul>'."\n";
        $content .= get_most_viewed('page', $stats_mostlimit, 0, false);
        $content .= '</ul>'."\n";
    }
    return $content;
}


### Function: Increment Post Views
add_action( 'wp_ajax_postviews', 'increment_views' );
add_action( 'wp_ajax_nopriv_postviews', 'increment_views' );
function increment_views() {
    if( empty( $_GET['postviews_id'] ) )
        return;

    if( !defined( 'WP_CACHE' ) || !WP_CACHE )
        return;

    $views_options = get_option( 'views_options' );

    if( isset( $views_options['use_ajax'] ) && intval( $views_options['use_ajax'] ) === 0 )
        return;

    $post_id = intval( $_GET['postviews_id'] );
    if( $post_id > 0 ) {
        $post_views = get_post_custom( $post_id );
        $post_views = intval( $post_views['views'][0] );
        update_post_meta( $post_id, 'views', ( $post_views + 1 ) );
        do_action( 'postviews_increment_views_ajax', ( $post_views + 1 ) );
        echo ( $post_views + 1 );
        exit();
    }
}

### Function Show Post Views Column in WP-Admin
add_action('manage_posts_custom_column', 'add_postviews_column_content');
add_filter('manage_posts_columns', 'add_postviews_column');
add_action('manage_pages_custom_column', 'add_postviews_column_content');
add_filter('manage_pages_columns', 'add_postviews_column');
function add_postviews_column($defaults) {
    $defaults['views'] = __( 'Views', 'wp-postviews' );
    return $defaults;
}


### Functions Fill In The Views Count
function add_postviews_column_content($column_name) {
    if($column_name == 'views') {
        if(function_exists('the_views')) { the_views(true, '', '', true); }
    }
}


### Function Sort Columns
add_filter('manage_edit-post_sortable_columns', 'sort_postviews_column');
add_filter('manage_edit-page_sortable_columns', 'sort_postviews_column');
function sort_postviews_column($defaults)
{
    $defaults['views'] = 'views';
    return $defaults;
}
add_action('pre_get_posts', 'sort_postviews');
function sort_postviews($query) {
    if(!is_admin())
        return;
    $orderby = $query->get('orderby');
    if('views' == $orderby) {
        $query->set('meta_key', 'views');
        $query->set('orderby', 'meta_value_num');
    }
}

### Function: Round Numbers To K (Thousand), M (Million) or B (Billion)
function postviews_round_number( $number, $min_value = 1000, $decimal = 1 ) {
    if( $number < $min_value ) {
        return number_format_i18n( $number );
    }
    $alphabets = array( 1000000000 => 'B', 1000000 => 'M', 1000 => 'K' );
    foreach( $alphabets as $key => $value )
        if( $number >= $key ) {
            return round( $number / $key, $decimal ) . '' . $value;
        }
}


### Class: WP-PostViews Widget
 class WP_Widget_PostViews extends WP_Widget {
    // Constructor
    function __construct() {
        $widget_ops = array('description' => __('WP-PostViews views statistics', 'wp-postviews'));
        parent::__construct('views', __('Views', 'wp-postviews'), $widget_ops);
    }

    // Display Widget
    function widget($args, $instance) {
        $title = apply_filters('widget_title', esc_attr($instance['title']));
        $type = esc_attr($instance['type']);
        $mode = esc_attr($instance['mode']);
        $limit = intval($instance['limit']);
        $chars = intval($instance['chars']);
        $cat_ids = explode(',', esc_attr($instance['cat_ids']));
        echo $args['before_widget'] . $args['before_title'] . $title . $args['after_title'];
        echo '<ul>'."\n";
        switch($type) {
            case 'least_viewed':
                get_least_viewed($mode, $limit, $chars);
                break;
            case 'most_viewed':
                get_most_viewed($mode, $limit, $chars);
                break;
            case 'most_viewed_category':
                get_most_viewed_category($cat_ids, $mode, $limit, $chars);
                break;
            case 'least_viewed_category':
                get_least_viewed_category($cat_ids, $mode, $limit, $chars);
                break;
        }
        echo '</ul>'."\n";
        echo  $args['after_widget'];
    }

    // When Widget Control Form Is Posted
    function update($new_instance, $old_instance) {
        if (!isset($new_instance['submit'])) {
            return false;
        }
        $instance = $old_instance;
        $instance['title'] = strip_tags($new_instance['title']);
        $instance['type'] = strip_tags($new_instance['type']);
        $instance['mode'] = strip_tags($new_instance['mode']);
        $instance['limit'] = intval($new_instance['limit']);
        $instance['chars'] = intval($new_instance['chars']);
        $instance['cat_ids'] = strip_tags($new_instance['cat_ids']);
        return $instance;
    }

    // DIsplay Widget Control Form
    function form($instance) {
        $instance = wp_parse_args((array) $instance, array('title' => __('Views', 'wp-postviews'), 'type' => 'most_viewed', 'mode' => '', 'limit' => 10, 'chars' => 200, 'cat_ids' => '0'));
        $title = esc_attr($instance['title']);
        $type = esc_attr($instance['type']);
        $mode = trim(esc_attr($instance['mode']));
        $limit = intval($instance['limit']);
        $chars = intval($instance['chars']);
        $cat_ids = esc_attr($instance['cat_ids']);
        $post_types = get_post_types(array(
            'public' => true
        ));
?>
        <p>
            <label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title:', 'wp-postviews'); ?> <input class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" type="text" value="<?php echo $title; ?>" /></label>
        </p>
        <p>
            <label for="<?php echo $this->get_field_id('type'); ?>"><?php _e('Statistics Type:', 'wp-postviews'); ?>
                <select name="<?php echo $this->get_field_name('type'); ?>" id="<?php echo $this->get_field_id('type'); ?>" class="widefat">
                    <option value="least_viewed"<?php selected('least_viewed', $type); ?>><?php _e('Least Viewed', 'wp-postviews'); ?></option>
                    <option value="least_viewed_category"<?php selected('least_viewed_category', $type); ?>><?php _e('Least Viewed By Category', 'wp-postviews'); ?></option>
                    <optgroup>&nbsp;</optgroup>
                    <option value="most_viewed"<?php selected('most_viewed', $type); ?>><?php _e('Most Viewed', 'wp-postviews'); ?></option>
                    <option value="most_viewed_category"<?php selected('most_viewed_category', $type); ?>><?php _e('Most Viewed By Category', 'wp-postviews'); ?></option>
                </select>
            </label>
        </p>
        <p>
            <label for="<?php echo $this->get_field_id('mode'); ?>"><?php _e('Include Views From:', 'wp-postviews'); ?>
                <select name="<?php echo $this->get_field_name('mode'); ?>" id="<?php echo $this->get_field_id('mode'); ?>" class="widefat">
                    <option value=""<?php selected('', $mode); ?>><?php _e('All', 'wp-postviews'); ?></option>
                    <?php if($post_types > 0): ?>
                        <?php foreach($post_types as $post_type): ?>
                            <option value="<?php echo $post_type; ?>"<?php selected($post_type, $mode); ?>><?php printf(__('%s Only', 'wp-postviews'), ucfirst($post_type)); ?></option>
                        <?php endforeach; ?>
                    <?php endif; ?>
                </select>
            </label>
        </p>
        <p>
            <label for="<?php echo $this->get_field_id('limit'); ?>"><?php _e('No. Of Records To Show:', 'wp-postviews'); ?> <input class="widefat" id="<?php echo $this->get_field_id('limit'); ?>" name="<?php echo $this->get_field_name('limit'); ?>" type="text" value="<?php echo $limit; ?>" /></label>
        </p>
        <p>
            <label for="<?php echo $this->get_field_id('chars'); ?>"><?php _e('Maximum Post Title Length (Characters):', 'wp-postviews'); ?> <input class="widefat" id="<?php echo $this->get_field_id('chars'); ?>" name="<?php echo $this->get_field_name('chars'); ?>" type="text" value="<?php echo $chars; ?>" /></label><br />
            <small><?php _e('<strong>0</strong> to disable.', 'wp-postviews'); ?></small>
        </p>
        <p>
            <label for="<?php echo $this->get_field_id('cat_ids'); ?>"><?php _e('Category IDs:', 'wp-postviews'); ?> <span style="color: red;">*</span> <input class="widefat" id="<?php echo $this->get_field_id('cat_ids'); ?>" name="<?php echo $this->get_field_name('cat_ids'); ?>" type="text" value="<?php echo $cat_ids; ?>" /></label><br />
            <small><?php _e('Separate mutiple categories with commas.', 'wp-postviews'); ?></small>
        </p>
        <p style="color: red;">
            <small><?php _e('* If you are not using any category statistics, you can ignore it.', 'wp-postviews'); ?></small>
        <p>
        <input type="hidden" id="<?php echo $this->get_field_id('submit'); ?>" name="<?php echo $this->get_field_name('submit'); ?>" value="1" />
<?php
    }
}


### Function: Init WP-PostViews Widget
add_action( 'widgets_init', 'widget_views_init' );
function widget_views_init() {
    register_widget( 'WP_Widget_PostViews' );
}


### Function: Post Views Options
register_activation_hook( __FILE__, 'views_activation' );
function views_activation( $network_wide ) {
    // Add Options
    $option_name = 'views_options';
    $option = array(
          'count'                   => 1
        , 'exclude_bots'            => 0
        , 'display_home'            => 0
        , 'display_single'          => 0
        , 'display_page'            => 0
        , 'display_archive'         => 0
        , 'display_search'          => 0
        , 'display_other'           => 0
        , 'use_ajax'                => 1
        , 'template'                => __('%VIEW_COUNT% views', 'wp-postviews')
        , 'most_viewed_template'    => '<li><a href="%POST_URL%"  title="%POST_TITLE%">%POST_TITLE%</a> - %VIEW_COUNT% '.__('views', 'wp-postviews').'</li>'
    );

    if ( is_multisite() && $network_wide )
    {
        $ms_sites = wp_get_sites();

        if( 0 < sizeof( $ms_sites ) )
        {
            foreach ( $ms_sites as $ms_site )
            {
                switch_to_blog( $ms_site['blog_id'] );
                add_option( $option_name, $option );
            }
        }

        restore_current_blog();
    }
    else
    {
        add_option( $option_name, $option );
    }
}

### Function: Parse View Options
function views_options_parse($key) {
    return !empty($_POST[$key]) ? $_POST[$key] : null;
}