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Refactor next_post_link, previous_post_link. props xknown. fixes #5411 

git-svn-id: http://svn.automattic.com/wordpress/trunk@6359 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
ryan 2007-12-05 09:25:45 +00:00
parent 7c3f965571
commit 524c32cad5
1 changed files with 43 additions and 73 deletions
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116
wp-includes/link-template.php
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@ -360,39 +360,14 @@ function edit_comment_link( $link = 'Edit This', $before = '', $after = '' ) {
// Navigation links // Navigation links
function get_previous_post($in_same_cat = false, $excluded_categories = '') { function get_previous_post($in_same_cat = false, $excluded_categories = '') {
global $post, $wpdb; return get_adjacent_post($in_same_cat, $excluded_categories);
if( empty($post) || !is_single() || is_attachment() )
return null;
$current_post_date = $post->post_date;
$join = '';
if ( $in_same_cat ) {
$join = " INNER JOIN $wpdb->term_relationships AS tr ON p.ID = tr.object_id ";
$cat_array = wp_get_object_terms($post->ID, 'category', 'fields=tt_ids');
$join .= $wpdb->prepare(' AND (tr.term_taxonomy_id = %d', $cat_array[0]);
for ( $i = 1; $i < (count($cat_array)); $i++ ) {
$join .= $wpdb->prepare(' OR tr.term_taxonomy_id = %d', $cat_array[$i]);
}
$join .= ')';
}
$sql_exclude_cats = '';
if ( !empty($excluded_categories) ) {
$blah = explode(' and ', $excluded_categories);
$posts_in_ex_cats = get_objects_in_term($blah, 'category');
$posts_in_ex_cats_sql = 'AND p.ID NOT IN (' . implode($posts_in_ex_cats, ',') . ')';
}
$join = apply_filters( 'get_previous_post_join', $join, $in_same_cat, $excluded_categories );
$where = apply_filters( 'get_previous_post_where', $wpdb->prepare("WHERE p.post_date < %s AND p.post_type = 'post' AND p.post_status = 'publish' $posts_in_ex_cats_sql", $current_post_date), $in_same_cat, $excluded_categories );
$sort = apply_filters( 'get_previous_post_sort', 'ORDER BY p.post_date DESC LIMIT 1' );
return @$wpdb->get_row("SELECT p.ID, p.post_title FROM $wpdb->posts AS p $join $where $sort");
} }
function get_next_post($in_same_cat = false, $excluded_categories = '') { function get_next_post($in_same_cat = false, $excluded_categories = '') {
return get_adjacent_post($in_same_cat, $excluded_categories, false);
}
function get_adjacent_post($in_same_cat = false, $excluded_categories = '', $previous = true) {
global $post, $wpdb; global $post, $wpdb;
if( empty($post) || !is_single() || is_attachment() ) if( empty($post) || !is_single() || is_attachment() )
@ -401,58 +376,52 @@ function get_next_post($in_same_cat = false, $excluded_categories = '') {
$current_post_date = $post->post_date; $current_post_date = $post->post_date;
$join = ''; $join = '';
if ( $in_same_cat ) { if ( $in_same_cat || !empty($excluded_categories) ) {
$join = " INNER JOIN $wpdb->term_relationships AS tr ON p.ID = tr.object_id "; $join = " INNER JOIN $wpdb->term_relationships AS tr ON p.ID = tr.object_id INNER JOIN $wpdb->term_taxonomy tt ON tr.term_taxonomy_id = tt.term_taxonomy_id";
$cat_array = wp_get_object_terms($post->ID, 'category', 'fields=tt_ids');
$join .= $wpdb->prepare(' AND (tr.term_taxonomy_id = %d', $cat_array[0]); if ( $in_same_cat ) {
for ( $i = 1; $i < (count($cat_array)); $i++ ) { $cat_array = wp_get_object_terms($post->ID, 'category', 'fields=ids');
$join .= $wpdb->prepare(' OR tr.term_taxonomy_id = $d', $cat_array[$i]); $join .= " AND tt.taxonomy = 'category' AND tt.term_id IN (" . implode($cat_array, ',') . ')';
}
$posts_in_ex_cats_sql = "AND tt.taxonomy = 'category'";
if ( !empty($excluded_categories) ) {
$excluded_categories = array_map('intval', explode(' and ', $excluded_categories));
if ( !empty($cat_array) ) {
$excluded_categories = array_diff($excluded_categories, $cat_array);
$posts_in_ex_cats_sql = '';
}
if ( !empty($excluded_categories) ) {
$posts_in_ex_cats_sql = " AND tt.term_id NOT IN (" . implode($excluded_categories, ',') . ')';
}
} }
$join .= ')';
} }
$sql_exclude_cats = ''; $adjacent = $previous ? 'previous' : 'next';
if ( !empty($excluded_categories) ) { $op = $previous ? '<' : '>';
$blah = explode(' and ', $excluded_categories); $order = $previous ? 'DESC' : 'ASC';
$posts_in_ex_cats = get_objects_in_term($blah, 'category');
$posts_in_ex_cats_sql = 'AND p.ID NOT IN (' . implode($posts_in_ex_cats, ',') . ')';
}
$join = apply_filters( 'get_next_post_join', $join, $in_same_cat, $excluded_categories ); $join = apply_filters( "get_{$adjacent}_post_join", $join, $in_same_cat, $excluded_categories );
$where = apply_filters( 'get_next_post_where', $wpdb->prepare("WHERE p.post_date > %s AND p.post_type = 'post' AND p.post_status = 'publish' $posts_in_ex_cats_sql AND p.ID != %d", $current_post_date, $post->ID), $in_same_cat, $excluded_categories ); $where = apply_filters( "get_{$adjacent}_post_where", $wpdb->prepare("WHERE p.post_date $op %s AND p.post_type = 'post' AND p.post_status = 'publish' $posts_in_ex_cats_sql", $current_post_date), $in_same_cat, $excluded_categories );
$sort = apply_filters( 'get_next_post_sort', 'ORDER BY p.post_date ASC LIMIT 1' ); $sort = apply_filters( "get_{$adjacent}_post_sort", "ORDER BY p.post_date $order LIMIT 1" );
return @$wpdb->get_row("SELECT p.ID, p.post_title FROM $wpdb->posts AS p $join $where $sort"); return $wpdb->get_row("SELECT p.* FROM $wpdb->posts AS p $join $where $sort");
} }
function previous_post_link($format='&laquo; %link', $link='%title', $in_same_cat = false, $excluded_categories = '') { function previous_post_link($format='&laquo; %link', $link='%title', $in_same_cat = false, $excluded_categories = '') {
adjacent_post_link($format, $link, $in_same_cat, $excluded_categories, true);
if ( is_attachment() )
$post = & get_post($GLOBALS['post']->post_parent);
else
$post = get_previous_post($in_same_cat, $excluded_categories);
if ( !$post )
return;
$title = $post->post_title;
if ( empty($post->post_title) )
$title = __('Previous Post');
$title = apply_filters('the_title', $title, $post);
$string = '<a href="'.get_permalink($post->ID).'">';
$link = str_replace('%title', $title, $link);
$link = $pre . $string . $link . '</a>';
$format = str_replace('%link', $link, $format);
echo $format;
} }
function next_post_link($format='%link &raquo;', $link='%title', $in_same_cat = false, $excluded_categories = '') { function next_post_link($format='%link &raquo;', $link='%title', $in_same_cat = false, $excluded_categories = '') {
$post = get_next_post($in_same_cat, $excluded_categories); adjacent_post_link($format, $link, $in_same_cat, $excluded_categories, false);
}
function adjacent_post_link($format, $link, $in_same_cat = false, $excluded_categories = '', $previous = true) {
if ( $previous && is_attachment() )
$post = & get_post($GLOBALS['post']->post_parent);
else
$post = get_adjacent_post($in_same_cat, $excluded_categories, $previous);
if ( !$post ) if ( !$post )
return; return;
@ -460,12 +429,13 @@ function next_post_link($format='%link &raquo;', $link='%title', $in_same_cat =
$title = $post->post_title; $title = $post->post_title;
if ( empty($post->post_title) ) if ( empty($post->post_title) )
$title = __('Next Post'); $title = $previous ? __('Previous Post') : __('Next Post');
$title = apply_filters('the_title', $title, $post); $title = apply_filters('the_title', $title, $post);
$string = '<a href="'.get_permalink($post->ID).'">'; $string = '<a href="'.get_permalink($post).'">';
$link = str_replace('%title', $title, $link); $link = str_replace('%title', $title, $link);
$link = $string . $link . '</a>'; $link = $string . $link . '</a>';
$format = str_replace('%link', $link, $format); $format = str_replace('%link', $link, $format);
echo $format; echo $format;