same-category-posts / same-category-posts.php

same-category-posts.php in Same Category Posts 1.0.1, at same-category-posts.php

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1	<?php
2	/*
3	Plugin Name: Same Category Posts
4	Plugin URI: https://wordpress.org/plugins/same-category-posts/
5	Description: Adds a widget that shows the most recent posts from a single category.
6	Author: DFlöter
7	Version: 1.0.1
8	Author URI: https://profiles.wordpress.org/kometschuh/
9	*/
10
11	// Don't call the file directly
12	if ( !defined( 'ABSPATH' ) ) exit;
13
14	/**
15	* Register our styles
16	*
17	* @return void
18	*/
19	add_action( 'wp_enqueue_scripts', 'same_category_posts_styles' );
20
21	function same_category_posts_styles() {
22	wp_register_style( 'same-category-posts', plugins_url( 'same-category-posts/same-category-posts.css' ) );
23	wp_enqueue_style( 'same-category-posts' );
24	}
25
26	/**
27	* Register thumbnail sizes.
28	*
29	* @return void
30	*/
31	if ( function_exists('add_image_size') )
32	{
33	$sizes = get_option('kts_same_category_post_thumb_sizes');
34	if ( $sizes )
35	{
36	foreach ( $sizes as $id=>$size )
37	add_image_size( 'related_post_thumb_size' . $id, $size[0], $size[1], true );
38	}
39	}
40
41	/**
42	* Related Posts Widget Class
43	*
44	* Shows posts from same category with some configurable options
45	*/
46	class SameCategoryPosts extends WP_Widget {
47
48	function __construct() {
49	$widget_ops = array('classname' => 'same-category-posts', 'description' => __('List posts from same category in sidebar based on shown post\'s category'));
50	parent::__construct('same-category-posts', __('Same Category Posts'), $widget_ops);
51	}
52
53	// Displays a list of posts from same category on single post pages.
54	function widget($args, $instance) {
55	// Only show widget if on a post page.
56	if ( !is_single() ) return;
57
58	global $post;
59	$post_old = $post; // Save the post object.
60
61	extract( $args );
62
63	$categories = get_the_category();
64	$category = $categories[0]->cat_ID;
65
66	if( !$instance["title"] ) {
67	$category_info = get_category( $category );
68	$instance["title"] = $category_info->name;
69	}
70
71	// Excerpt length filter
72	$new_excerpt_length = create_function('$length', "return " . $instance["excerpt_length"] . ";");
73	if ( $instance["excerpt_length"] > 0 )
74	add_filter('excerpt_length', $new_excerpt_length);
75
76	$args=array(
77	'cat' => $category . ',' . -$instance['exclude_category'],
78	'showposts'=> $instance['num'], // Number of related posts that will be shown.
79	'ignore_sticky_posts'=>1
80	);
81	$my_query = new WP_Query($args);
82
83	if( $my_query->have_posts() )
84	{
85	echo $before_widget;
86
87	// Widget title
88	echo $before_title . $instance["title"] . $after_title;
89
90	// Post list
91	echo "<ul>\n";
92	while ($my_query->have_posts())
93	{
94	$my_query->the_post();
95	?>
96	<li class="same-category-posts">
97	<a class="post-title" href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a>
98
99	<?php if ( isset( $instance['date'] ) ) : ?>
100	<p class="post-date"><?php the_time("j M Y"); ?></p>
101	<?php endif; ?>
102
103	<?php
104	if (
105	function_exists('the_post_thumbnail') &&
106	current_theme_supports("post-thumbnails") &&
107	isset ( $instance["thumb"] ) &&
108	has_post_thumbnail()
109	) :
110	?>
111	<a href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>">
112	<?php the_post_thumbnail( 'related_post_thumb_size'.$this->id ); ?>
113	</a>
114	<?php endif; ?>
115
116	<?php if ( isset ( $instance['excerpt'] ) ) : ?>
117	<?php the_excerpt(); ?>
118	<?php endif; ?>
119
120	<?php if ( isset ( $instance['comment_num'] ) ) : ?>
121	<p class="comment-num">(<?php comments_number(); ?>)</p>
122	<?php endif; ?>
123	</li>
124	<?php
125	}
126	echo "</ul>\n";
127
128	echo $after_widget;
129	}
130
131	remove_filter('excerpt_length', $new_excerpt_length);
132
133	$post = $post_old; // Restore the post object.
134	}
135
136	/**
137	* Update the options
138	*
139	* @param array $new_instance
140	* @param array $old_instance
141	* @return array
142	*/
143	function update($new_instance, $old_instance) {
144	if ( function_exists('the_post_thumbnail') )
145	{
146	$sizes = get_option('kts_same_category_post_thumb_sizes');
147	if ( !$sizes ) $sizes = array();
148	$sizes[$this->id] = array($new_instance['thumb_w'], $new_instance['thumb_h']);
149	update_option('kts_same_category_post_thumb_sizes', $sizes);
150	}
151
152	return $new_instance;
153	}
154
155	/**
156	* The widget configuration form back end.
157	*
158	* @param array $instance
159	* @return void
160	*/
161	function form($instance) {
162	$instance = wp_parse_args( ( array ) $instance, array(
163	'title' => __( '' ),
164	'num' => __( '' ),
165	'title_link' => __( '' ),
166	'exclude_category' => __( '' ),
167	'excerpt' => __( '' ),
168	'excerpt_length' => __( '' ),
169	'comment_num' => __( '' ),
170	'date' => __( '' ),
171	'thumb' => __( '' ),
172	'thumb_w' => __( '' ),
173	'thumb_h' => __( '' )
174	) );
175
176	$title = $instance['title'];
177	$num = $instance['num'];
178	$title_link = $instance['title_link'];
179	$exclude_category = $instance['exclude_category'];
180	$excerpt = $instance['excerpt'];
181	$excerpt_length = $instance['excerpt_length'];
182	$comment_num = $instance['comment_num'];
183	$date = $instance['date'];
184	$thumb = $instance['thumb'];
185	$thumb_w = $instance['thumb_w'];
186	$thumb_h = $instance['thumb_h'];
187
188	?>
189	<p>
190	<label for="<?php echo $this->get_field_id("title"); ?>">
191	<?php _e( 'Title' ); ?>:
192	<input class="widefat" id="<?php echo $this->get_field_id("title"); ?>" name="<?php echo $this->get_field_name("title"); ?>" type="text" value="<?php echo esc_attr($instance["title"]); ?>" />
193	</label>
194	</p>
195
196	<p>
197	<label for="<?php echo $this->get_field_id("num"); ?>">
198	<?php _e('Number of posts to show'); ?>:
199	<input style="text-align: center;" id="<?php echo $this->get_field_id("num"); ?>" name="<?php echo $this->get_field_name("num"); ?>" type="text" value="<?php echo absint($instance["num"]); ?>" size='3' />
200	</label>
201	</p>
202
203	<p>
204	<label>
205	<?php _e( 'Exclude category' ); ?>:
206	<?php wp_dropdown_categories( array( 'show_option_none' => ' ', 'name' => $this->get_field_name("exclude_category"), 'selected' => $instance["exclude_category"] ) ); ?>
207	</label>
208	</p>
209
210	<p>
211	<label for="<?php echo $this->get_field_id("excerpt"); ?>">
212	<input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id("excerpt"); ?>" name="<?php echo $this->get_field_name("excerpt"); ?>"<?php checked( (bool) $instance["excerpt"], true ); ?> />
213	<?php _e( 'Show post excerpt' ); ?>
214	</label>
215	</p>
216
217	<p>
218	<label for="<?php echo $this->get_field_id("excerpt_length"); ?>">
219	<?php _e( 'Excerpt length (in words):' ); ?>
220	</label>
221	<input style="text-align: center;" type="text" id="<?php echo $this->get_field_id("excerpt_length"); ?>" name="<?php echo $this->get_field_name("excerpt_length"); ?>" value="<?php echo $instance["excerpt_length"]; ?>" size="3" />
222	</p>
223
224	<p>
225	<label for="<?php echo $this->get_field_id("comment_num"); ?>">
226	<input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id("comment_num"); ?>" name="<?php echo $this->get_field_name("comment_num"); ?>"<?php checked( (bool) $instance["comment_num"], true ); ?> />
227	<?php _e( 'Show number of comments' ); ?>
228	</label>
229	</p>
230
231	<p>
232	<label for="<?php echo $this->get_field_id("date"); ?>">
233	<input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id("date"); ?>" name="<?php echo $this->get_field_name("date"); ?>"<?php checked( (bool) $instance["date"], true ); ?> />
234	<?php _e( 'Show post date' ); ?>
235	</label>
236	</p>
237
238	<?php if ( function_exists('the_post_thumbnail') && current_theme_supports("post-thumbnails") ) : ?>
239	<p>
240	<label for="<?php echo $this->get_field_id("thumb"); ?>">
241	<input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id("thumb"); ?>" name="<?php echo $this->get_field_name("thumb"); ?>"<?php checked( (bool) $instance["thumb"], true ); ?> />
242	<?php _e( 'Show post thumbnail' ); ?>
243	</label>
244	</p>
245	<p>
246	<label>
247	<?php _e('Thumbnail dimensions (in pixels)'); ?>:<br />
248	<label for="<?php echo $this->get_field_id("thumb_w"); ?>">
249	Width: <input class="widefat" style="width:30%;" type="text" id="<?php echo $this->get_field_id("thumb_w"); ?>" name="<?php echo $this->get_field_name("thumb_w"); ?>" value="<?php echo $instance["thumb_w"]; ?>" />
250	</label>
251
252	<label for="<?php echo $this->get_field_id("thumb_h"); ?>">
253	Height: <input class="widefat" style="width:30%;" type="text" id="<?php echo $this->get_field_id("thumb_h"); ?>" name="<?php echo $this->get_field_name("thumb_h"); ?>" value="<?php echo $instance["thumb_h"]; ?>" />
254	</label>
255	</label>
256	</p>
257	<?php endif; ?>
258
259	<?php
260
261	}
262
263	}
264
265	add_action( 'widgets_init', create_function('', 'return register_widget("SameCategoryPosts");') );
266