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<?php if ( ! defined( 'ABSPATH' ) ) {
die( 'Direct access forbidden.' );
}
/*
Name: WordPress Post Like System
Description: A simple and efficient post like system for WordPress.
Version: 0.5.2
Author: Jon Masterson
Author URI: http://jonmasterson.com/
License:
Copyright (C) 2015 Jon Masterson
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 3 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, see <http://www.gnu.org/licenses/>.
*/
/**
* Processes like/unlike
*
* @since 0.5
*/
add_action( 'wp_ajax_nopriv_process_crumina_like', 'process_crumina_like' );
add_action( 'wp_ajax_process_crumina_like', 'process_crumina_like' );
function process_crumina_like() {
// Security
$nonce = isset( $_REQUEST['nonce'] ) ? sanitize_text_field( $_REQUEST['nonce'] ) : 0;
if ( ! wp_verify_nonce( $nonce, 'crumina-likes-nonce' ) ) {
exit( esc_html__( 'Not permitted', 'seosight' ) );
}
// Test if javascript is disabled
$disabled = ( isset( $_REQUEST['disabled'] ) && $_REQUEST['disabled'] == true ) ? true : false;
// Test if this is a comment
$is_comment = ( isset( $_REQUEST['is_comment'] ) && $_REQUEST['is_comment'] == 1 ) ? 1 : 0;
// Base variables
$post_id = ( isset( $_REQUEST['post_id'] ) && is_numeric( $_REQUEST['post_id'] ) ) ? $_REQUEST['post_id'] : '';
$result = array();
$post_users = null;
$like_count = 0;
// Get plugin options
if ( $post_id != '' ) {
$count = ( $is_comment == 1 ) ? get_comment_meta( $post_id, "_comment_like_count", true ) : get_post_meta( $post_id, "_post_like_count", true ); // like count
$count = ( isset( $count ) && is_numeric( $count ) ) ? $count : 0;
if ( ! crumina_already_liked( $post_id, $is_comment ) ) { // Like the post
if ( is_user_logged_in() ) { // user is logged in
$user_id = get_current_user_id();
$post_users = crumina_post_user_likes( $user_id, $post_id, $is_comment );
if ( $is_comment == 1 ) {
// Update User & Comment
$user_like_count = get_user_option( "_comment_like_count", $user_id );
$user_like_count = ( isset( $user_like_count ) && is_numeric( $user_like_count ) ) ? $user_like_count : 0;
update_user_option( $user_id, "_comment_like_count", ++ $user_like_count );
if ( $post_users ) {
update_comment_meta( $post_id, "_user_comment_liked", $post_users );
}
} else {
// Update User & Post
$user_like_count = get_user_option( "_user_like_count", $user_id );
$user_like_count = ( isset( $user_like_count ) && is_numeric( $user_like_count ) ) ? $user_like_count : 0;
update_user_option( $user_id, "_user_like_count", ++ $user_like_count );
if ( $post_users ) {
update_post_meta( $post_id, "_user_liked", $post_users );
}
}
} else { // user is anonymous
$user_ip = crumina_get_ip();
$post_users = crumina_post_ip_likes( $user_ip, $post_id, $is_comment );
// Update Post
if ( $post_users ) {
if ( $is_comment == 1 ) {
update_comment_meta( $post_id, "_user_comment_IP", $post_users );
} else {
update_post_meta( $post_id, "_user_IP", $post_users );
}
}
}
$like_count = ++ $count;
$response['status'] = "liked";
$response['title'] = __('Unlike', 'seosight');
$response['icon'] = crumina_get_liked_icon();
} else { // Unlike the post
if ( is_user_logged_in() ) { // user is logged in
$user_id = get_current_user_id();
$post_users = crumina_post_user_likes( $user_id, $post_id, $is_comment );
// Update User
if ( $is_comment == 1 ) {
$user_like_count = get_user_option( "_comment_like_count", $user_id );
$user_like_count = ( isset( $user_like_count ) && is_numeric( $user_like_count ) ) ? $user_like_count : 0;
if ( $user_like_count > 0 ) {
update_user_option( $user_id, "_comment_like_count", -- $user_like_count );
}
} else {
$user_like_count = get_user_option( "_user_like_count", $user_id );
$user_like_count = ( isset( $user_like_count ) && is_numeric( $user_like_count ) ) ? $user_like_count : 0;
if ( $user_like_count > 0 ) {
update_user_option( $user_id, '_user_like_count', -- $user_like_count );
}
}
// Update Post
if ( $post_users ) {
$uid_key = array_search( $user_id, $post_users );
unset( $post_users[ $uid_key ] );
if ( $is_comment == 1 ) {
update_comment_meta( $post_id, "_user_comment_liked", $post_users );
} else {
update_post_meta( $post_id, "_user_liked", $post_users );
}
}
} else { // user is anonymous
$user_ip = crumina_get_ip();
$post_users = crumina_post_ip_likes( $user_ip, $post_id, $is_comment );
// Update Post
if ( $post_users ) {
$uip_key = array_search( $user_ip, $post_users );
unset( $post_users[ $uip_key ] );
if ( $is_comment == 1 ) {
update_comment_meta( $post_id, "_user_comment_IP", $post_users );
} else {
update_post_meta( $post_id, "_user_IP", $post_users );
}
}
}
$like_count = ( $count > 0 ) ? -- $count : 0; // Prevent negative number
$response['status'] = "unliked";
$response['title'] = __('Like', 'seosight');
$response['icon'] = crumina_get_unliked_icon();
}
if ( $is_comment == 1 ) {
update_comment_meta( $post_id, "_comment_like_count", $like_count );
update_comment_meta( $post_id, "_comment_like_modified", date( 'Y-m-d H:i:s' ) );
} else {
update_post_meta( $post_id, "_post_like_count", $like_count );
update_post_meta( $post_id, "_post_like_modified", date( 'Y-m-d H:i:s' ) );
}
$response['count'] = crumina_get_like_count( $like_count );
$response['testing'] = $is_comment;
if ( $disabled == true ) {
if ( $is_comment == 1 ) {
wp_redirect( get_permalink( get_the_ID() ) );
exit();
} else {
wp_redirect( get_permalink( $post_id ) );
exit();
}
} else {
wp_send_json( $response );
}
}
}
/**
* Utility to test if the post is already liked
*
* @since 0.5
*/
function crumina_already_liked( $post_id, $is_comment ) {
$post_users = null;
$user_id = null;
if ( is_user_logged_in() ) { // user is logged in
$user_id = get_current_user_id();
$post_meta_users = ( $is_comment == 1 ) ? get_comment_meta( $post_id, "_user_comment_liked" ) : get_post_meta( $post_id, "_user_liked" );
if ( count( $post_meta_users ) != 0 ) {
$post_users = $post_meta_users[0];
}
} else { // user is anonymous
$user_id = crumina_get_ip();
$post_meta_users = ( $is_comment == 1 ) ? get_comment_meta( $post_id, "_user_comment_IP" ) : get_post_meta( $post_id, "_user_IP" );
if ( count( $post_meta_users ) != 0 ) { // meta exists, set up values
$post_users = $post_meta_users[0];
}
}
if ( is_array( $post_users ) && in_array( $user_id, $post_users ) ) {
return true;
} else {
return false;
}
} // crumina_already_liked()
/**
* Output the like button
*
* @since 0.5
*/
function get_crumina_likes_button( $post_id, $is_comment = null ) {
$is_comment = ( null == $is_comment ) ? 0 : 1;
$output = '';
$nonce = wp_create_nonce( 'crumina-likes-nonce' ); // Security
if ( $is_comment == 1 ) {
$post_id_class = esc_attr( ' sl-comment-button-' . $post_id );
$comment_class = esc_attr( ' sl-comment' );
$like_count = get_comment_meta( $post_id, "_comment_like_count", true );
$like_count = ( isset( $like_count ) && is_numeric( $like_count ) ) ? $like_count : 0;
} else {
$post_id_class = esc_attr( ' sl-button-' . $post_id );
$comment_class = esc_attr( '' );
$like_count = get_post_meta( $post_id, "_post_like_count", true );
$like_count = ( isset( $like_count ) && is_numeric( $like_count ) ) ? $like_count : 0;
}
$count = crumina_get_like_count( $like_count );
$icon_empty = crumina_get_unliked_icon();
$icon_full = crumina_get_liked_icon();
// Loader
$loader = '<span id="sl-loader"></span>';
// Liked/Unliked Variables
if ( crumina_already_liked( $post_id, $is_comment ) ) {
$class = esc_attr( ' liked' );
$title = esc_html__( 'Unlike', 'seosight' );
$icon = $icon_full;
} else {
$class = '';
$title = esc_html__( 'Like', 'seosight' );
$icon = $icon_empty;
}
$output = '<span class="sl-wrapper"><a href="' . admin_url( 'admin-ajax.php?action=process_crumina_like' . '&post_id=' . $post_id . '&nonce=' . $nonce . '&is_comment=' . $is_comment . '&disabled=true' ) . '" class="sl-button likes' . $post_id_class . $class . $comment_class . '" data-nonce="' . $nonce . '" data-post-id="' . $post_id . '" data-iscomment="' . $is_comment . '" title="' . $title . '">' . $icon . $count . '</a>' . $loader . '</span>';
return $output;
} // get_crumina_likes_button()
/**
* Utility retrieves post meta user likes (user id array),
* then adds new user id to retrieved array
*
* @since 0.5
*/
function crumina_post_user_likes( $user_id, $post_id, $is_comment ) {
$post_users = '';
$post_meta_users = ( $is_comment == 1 ) ? get_comment_meta( $post_id, "_user_comment_liked" ) : get_post_meta( $post_id, "_user_liked" );
if ( count( $post_meta_users ) != 0 ) {
$post_users = $post_meta_users[0];
}
if ( ! is_array( $post_users ) ) {
$post_users = array();
}
if ( ! in_array( $user_id, $post_users ) ) {
$post_users[ 'user-' . $user_id ] = $user_id;
}
return $post_users;
} // crumina_post_user_likes()
/**
* Utility retrieves post meta ip likes (ip array),
* then adds new ip to retrieved array
*
* @since 0.5
*/
function crumina_post_ip_likes( $user_ip, $post_id, $is_comment ) {
$post_users = '';
$post_meta_users = ( $is_comment == 1 ) ? get_comment_meta( $post_id, "_user_comment_IP" ) : get_post_meta( $post_id, "_user_IP" );
// Retrieve post information
if ( count( $post_meta_users ) != 0 ) {
$post_users = $post_meta_users[0];
}
if ( ! is_array( $post_users ) ) {
$post_users = array();
}
if ( ! in_array( $user_ip, $post_users ) ) {
$post_users[ 'ip-' . $user_ip ] = $user_ip;
}
return $post_users;
} // crumina_post_ip_likes()
/**
* Utility to retrieve IP address
*
* @since 0.5
*/
function crumina_get_ip() {
$ip = '0.0.0.0';
$client_ip = filter_input( INPUT_SERVER, 'HTTP_CLIENT_IP', FILTER_VALIDATE_IP );
$forwarded = filter_input( INPUT_SERVER, 'HTTP_X_FORWARDED_FOR', FILTER_VALIDATE_IP );
$remote = filter_input( INPUT_SERVER, 'REMOTE_ADDR', FILTER_VALIDATE_IP );
if ( $client_ip ) {
$ip = $client_ip;
} elseif ( $forwarded ) {
$ip = $forwarded;
} elseif ( $remote ) {
$ip = $remote;
}
return $ip;
} // crumina_get_ip()
/**
* Utility returns the button icon for "like" action
*
* @since 0.5
*/
function crumina_get_liked_icon() {
/* If already using Font Awesome with your theme, replace svg with: */
$icon = '<i class="seoicon-shape-heart"></i>';
return $icon;
} // crumina_get_liked_icon()
/**
* Utility returns the button icon for "unlike" action
*
* @since 0.5
*/
function crumina_get_unliked_icon() {
/* If already using Font Awesome with your theme, replace svg with: <i class="fa fa-heart-o"></i> */
$icon = '<span class="unliked"><i class="seoicon-shape-heart"></i></span>';
return $icon;
} // crumina_get_unliked_icon()
/**
* Utility function to format the button count,
* appending "K" if one thousand or greater,
* "M" if one million or greater,
* and "B" if one billion or greater (unlikely).
* $precision = how many decimal points to display (1.25K)
*
* @since 0.5
*/
function crumina_format_count( $number ) {
$precision = 2;
if ( $number >= 1000 && $number < 1000000 ) {
$formatted = number_format( $number / 1000, $precision ) . 'K';
} else if ( $number >= 1000000 && $number < 1000000000 ) {
$formatted = number_format( $number / 1000000, $precision ) . 'M';
} else if ( $number >= 1000000000 ) {
$formatted = number_format( $number / 1000000000, $precision ) . 'B';
} else {
$formatted = $number; // Number is less than 1000
}
$formatted = str_replace( '.00', '', $formatted );
return $formatted;
} // crumina_format_count()
/**
* Utility retrieves count plus count options,
* returns appropriate format based on options
*
* @since 0.5
*/
function crumina_get_like_count( $like_count ) {
if ( is_numeric( $like_count ) && $like_count > 0 ) {
$number = crumina_format_count( $like_count );
} else {
$number = '0';
}
$count = '<span class="count-likes">' . $number . '</span>';
return $count;
} // crumina_get_like_count()
// User Profile List
add_action( 'show_user_profile', 'crumina_show_user_likes' );
add_action( 'edit_user_profile', 'crumina_show_user_likes' );
function crumina_show_user_likes( $user ) { ?>
<table class="form-table">
<tr>
<th><label for="user_likes"><?php esc_html_e( 'You Like:', 'seosight' ); ?></label></th>
<td>
<?php
$types = get_post_types( array( 'public' => true ) );
$args = array(
'numberposts' => - 1,
'post_type' => $types,
'meta_query' => array(
array(
'key' => '_user_liked',
'value' => $user->ID,
'compare' => 'LIKE'
)
)
);
$sep = '';
$like_query = new WP_Query( $args );
if ( $like_query->have_posts() ) : ?>
<p>
<?php while ( $like_query->have_posts() ) : $like_query->the_post();
seosight_render($sep); ?><a href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>"><?php the_title(); ?></a>
<?php
$sep = ' · ';
endwhile;
?>
</p>
<?php else : ?>
<p><?php esc_html_e( 'You do not like anything yet.', 'seosight' ); ?></p>
<?php
endif;
wp_reset_postdata();
?>
</td>
</tr>
</table>
<?php } // crumina_show_user_likes()