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1<?php
2/*
3Plugin Name: wRandom banner
4Plugin URI: none
5Description: Rotated banner with saving choice on each page
6Author: Denis Nikiforov
7Author URI: http://wirgen.by/
8Version: 1.0
9*/
10
11global $banner_random_db_version;
12$banner_random_db_version = '1.0';
13
14register_activation_hook( __FILE__, 'banner_random_install' );
15
16add_action( 'init', 'banner_random_create_post_type' );
17add_action( 'admin_init', 'banner_random_post_delete' );
18add_action( 'add_meta_boxes', 'banner_random_meta_boxes' );
19add_action( 'save_post' , 'banner_random_meta_save' );
20add_action( 'admin_init', 'banner_random_clear_action_callback' );
21
22add_filter( 'post_row_actions', 'banner_random_clear_action', 10, 2 );
23add_filter( 'manage_banner_random_posts_columns', 'banner_random_columns_head' );
24add_action( 'manage_banner_random_posts_custom_column', 'banner_random_columns_content', 10, 2 );
25
26add_shortcode('banner-random', 'banner_random_output');
27
28function banner_random_install() {
29  global $wpdb;
30  global $banner_random_db_version;
31
32  $table_name = $wpdb->prefix . "banner_random";
33  $charset_collate = $wpdb->get_charset_collate();
34
35  $sql = "CREATE TABLE IF NOT EXISTS $table_name (
36		`id` int(11) NOT NULL AUTO_INCREMENT,
37		`banner_id` int(11) NOT NULL,
38		`post_id` int(11) NOT NULL,
39		`string` text NOT NULL,
40		PRIMARY KEY  (id)
41	) $charset_collate;";
42
43  require_once( ABSPATH . 'wp-admin/includes/upgrade.php' );
44  dbDelta( $sql );
45
46  add_option( 'banner_random_db_version', $banner_random_db_version );
47
48  register_uninstall_hook( __FILE__, 'banner_random_uninstall' );
49}
50
51function banner_random_uninstall() {
52  global $wpdb;
53
54  $table_name = $wpdb->prefix . "banner_random";
55  $wpdb->query("DROP TABLE $table_name");
56}
57
58function banner_random_create_post_type() {
59  register_post_type( 'banner_random',
60    array(
61      'labels' => array(
62        'name' => __( 'Random banners', 'banner_random' ),
63        'singular_name' => __( 'Random banner', 'banner_random' )
64      ),
65      'public' => false,
66      'show_ui' => true,
67      'supports' => [ 'title', 'thumbnail' ],
68    )
69  );
70}
71
72function banner_random_post_delete( $post_id ) {
73  global $wpdb;
74
75  $table_name = $wpdb->prefix . "banner_random";
76  $wpdb->query('DELETE FROM ' . $table_name . ' WHERE `banner_id` = ' . $post_id);
77}
78
79function banner_random_meta_boxes( $post_type ) {
80  if ( $post_type == 'banner_random' )
81    add_meta_box('wbr_text_meta', __( 'Text', 'banner_random' ), 'banner_random_text_meta', 'banner_random' );
82}
83
84function banner_random_text_meta( $post ) {
85  wp_nonce_field( plugin_basename(__FILE__), 'banner_random_nonce' );
86
87  $text = get_post_meta( $post->ID, '_wbr_text_meta', true );
88
89  echo '<textarea id="banner_random_text" name="banner_random_text" rows="10" style="width:100%;">' . $text . '</textarea>';
90  echo '<p class="howto">По одному предложению на каждую строку</p>';
91}
92
93function banner_random_meta_save( $post_id ) {
94  if ( ! wp_verify_nonce( $_POST['banner_random_nonce'], plugin_basename(__FILE__) ) )
95    return $post_id;
96
97  if ( defined('DOING_AUTOSAVE') && DOING_AUTOSAVE )
98    return $post_id;
99
100  if ( 'banner_random' == $_POST['post_type'] && ! current_user_can( 'edit_page', $post_id ) ) {
101    return $post_id;
102  } elseif( ! current_user_can( 'edit_post', $post_id ) ) {
103    return $post_id;
104  }
105
106  if ( ! isset( $_POST['banner_random_text'] ) )
107    return;
108
109  $text = $_POST['banner_random_text'];
110  update_post_meta( $post_id, '_wbr_text_meta', $text );
111}
112
113function banner_random_clear_action( $actions, $post ) {
114  if ( $post->post_type == 'banner_random' ) {
115    $url = add_query_arg(
116      array(
117        'post_id' => $post->ID,
118        'action' => 'clear_references',
119      )
120    );
121
122    $actions['clear'] = '<a href="' . esc_url( $url ) . '">' . __( 'Clear references', 'banner_random' ) . '</a>';
123  }
124
125  return $actions;
126}
127
128function banner_random_columns_head( $columns ) {
129  $temp = array(
130    'cb' => $columns['cb'],
131    'title' => $columns['title'],
132    'wbr_shortcode' => __( 'Shortcode', 'banner_random' ),
133  );
134  array_shift($columns);
135  array_shift($columns);
136  $columns = array_merge($temp, $columns);
137
138  if ( isset( $_GET['clear_msg'] ) ) {
139    add_action( 'admin_notices', function() {
140      $banner = get_post( $_GET['clear_msg'] );
141      echo '<div class="notice notice-success is-dismissible"><p>' . sprintf( __( 'Banner <b>%s</b> references cleared successful.', 'banner_random' ), $banner->post_title ) . '</p></div>';
142    } );
143  }
144
145  return $columns;
146}
147
148function banner_random_columns_content( $column_name, $post_id ) {
149  if ( $column_name == 'wbr_shortcode' ) {
150    echo '[banner-random id="' . $post_id . '"]';
151  }
152}
153
154function banner_random_clear_action_callback() {
155  if( $_GET['post_type'] != 'banner_random' )
156    return;
157
158  if( isset( $_GET['action'] ) && isset( $_GET['post_id'] ) && ( $_GET['action'] == 'clear_references' ) ) {
159    global $wpdb;
160
161    $table_name = $wpdb->prefix . "banner_random";
162    $wpdb->query('DELETE FROM ' . $table_name . ' WHERE `banner_id` = ' . $_GET['post_id']);
163
164    if ( wp_redirect(admin_url('edit.php?post_type=banner_random&clear_msg=' . $_GET['post_id']), 301) )
165      exit;
166  }
167}
168
169function banner_random_output( $atts ) {
170  if ( ! isset( $atts['id'] ) )
171    return '';
172
173  global $post;
174  global $wpdb;
175
176  $post_id = $post->ID;
177  $table_name = $wpdb->prefix . "banner_random";
178
179  $banner = $wpdb->get_row("SELECT * FROM $table_name WHERE `banner_id` = {$atts['id']} AND `post_id` = $post_id");
180  if ( $banner == null ) {
181    $banner = get_post( $atts['id'] );
182    if ( $banner->post_type != 'banner_random' ) {
183      return '';
184    }
185    $banner->banner_id = $banner->ID;
186    $banner->post_id = $post_id;
187
188    $strings = explode( "\n", str_replace( "\r", '', get_post_meta( $banner->ID, '_wbr_text_meta', true ) ) );
189    $banner->string = $strings[ mt_rand( 0, count( $strings )-1 ) ];
190
191    $wpdb->insert(
192      $table_name,
193      array( 'banner_id' => $banner->banner_id, 'post_id' => $banner->post_id, 'string' => $banner->string ),
194      array( '%d', '%d', '%s' )
195    );
196  }
197
198  $post_thumbnail_id = get_post_thumbnail_id( $banner->banner_id );
199  if ( $post_thumbnail_id ) {
200    $thumbnail = wp_get_attachment_image( $post_thumbnail_id, 'full' );
201  } else {
202    $thumbnail = '';
203  }
204
205  return '<div id="rbanner' . $banner->banner_id . '" class="box banner_random">
206    ' . $thumbnail . '
207    <div class="box-text">' . $banner->string . '</div>
208  </div>';
209}