/**
* @ticket 17807
*/
public function test_get_adjacent_post()
{
// Need some sample posts to test adjacency
$post_one = self::factory()->post->create_and_get(array('post_title' => 'First', 'post_date' => '2012-01-01 12:00:00'));
$post_two = self::factory()->post->create_and_get(array('post_title' => 'Second', 'post_date' => '2012-02-01 12:00:00'));
$post_three = self::factory()->post->create_and_get(array('post_title' => 'Third', 'post_date' => '2012-03-01 12:00:00'));
$post_four = self::factory()->post->create_and_get(array('post_title' => 'Fourth', 'post_date' => '2012-04-01 12:00:00'));
// Assign some terms
wp_set_object_terms($post_one->ID, 'wordpress', 'category', false);
wp_set_object_terms($post_three->ID, 'wordpress', 'category', false);
wp_set_object_terms($post_two->ID, 'plugins', 'post_tag', false);
wp_set_object_terms($post_four->ID, 'plugins', 'post_tag', false);
// Test normal post adjacency
$this->go_to(get_permalink($post_two->ID));
$this->assertEquals($post_one, get_adjacent_post(false, '', true));
$this->assertEquals($post_three, get_adjacent_post(false, '', false));
$this->assertNotEquals($post_two, get_adjacent_post(false, '', true));
$this->assertNotEquals($post_two, get_adjacent_post(false, '', false));
// Test category adjacency
$this->go_to(get_permalink($post_one->ID));
$this->assertEquals('', get_adjacent_post(true, '', true, 'category'));
$this->assertEquals($post_three, get_adjacent_post(true, '', false, 'category'));
// Test tag adjacency
$this->go_to(get_permalink($post_two->ID));
$this->assertEquals('', get_adjacent_post(true, '', true, 'post_tag'));
$this->assertEquals($post_four, get_adjacent_post(true, '', false, 'post_tag'));
// Test normal boundary post
$this->go_to(get_permalink($post_two->ID));
$this->assertEquals(array($post_one), get_boundary_post(false, '', true));
$this->assertEquals(array($post_four), get_boundary_post(false, '', false));
// Test category boundary post
$this->go_to(get_permalink($post_one->ID));
$this->assertEquals(array($post_one), get_boundary_post(true, '', true, 'category'));
$this->assertEquals(array($post_three), get_boundary_post(true, '', false, 'category'));
// Test tag boundary post
$this->go_to(get_permalink($post_two->ID));
$this->assertEquals(array($post_two), get_boundary_post(true, '', true, 'post_tag'));
$this->assertEquals(array($post_four), get_boundary_post(true, '', false, 'post_tag'));
}
/**
* Get boundary post relational link.
*
* Can either be start or end post relational link.
*
* @since 2.8.0
* @deprecated 3.3.0
*
* @param string $title Optional. Link title format.
* @param bool $in_same_cat Optional. Whether link should be in a same category.
* @param string $excluded_categories Optional. Excluded categories IDs.
* @param bool $start Optional, default is true. Whether to display link to first or last post.
* @return string
*/
function get_boundary_post_rel_link($title = '%title', $in_same_cat = false, $excluded_categories = '', $start = true)
{
_deprecated_function(__FUNCTION__, '3.3');
$posts = get_boundary_post($in_same_cat, $excluded_categories, $start);
// If there is no post stop.
if (empty($posts)) {
return;
}
// Even though we limited get_posts to return only 1 item it still returns an array of objects.
$post = $posts[0];
if (empty($post->post_title)) {
$post->post_title = $start ? __('First Post') : __('Last Post');
}
$date = mysql2date(get_option('date_format'), $post->post_date);
$title = str_replace('%title', $post->post_title, $title);
$title = str_replace('%date', $date, $title);
$title = apply_filters('the_title', $title, $post->ID);
$link = $start ? "<link rel='start' title='" : "<link rel='end' title='";
$link .= esc_attr($title);
$link .= "' href='" . get_permalink($post) . "' />\n";
$boundary = $start ? 'start' : 'end';
return apply_filters("{$boundary}_post_rel_link", $link);
}
</a></span>
<?php
}
?>
<?php
if (get_adjacent_post($in_same_cat = true, '', $previous = false)) {
?>
<span class="next"><?php
next_post_link('%link', 'Next: %title ›', true);
?>
</span>
<?php
} else {
?>
<?php
$first_post = array_pop(get_boundary_post($in_same_cat = true, '', $oldest = true));
?>
<span class="next"><a href="<?php
echo get_permalink($first_post);
?>
">First: <?php
echo $first_post->post_title;
?>
›</a></span>
<?php
}
?>
</div>
<?php
}
?>
