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In same category support for next and previous post navigation. http://mosquito.wordpress.org/view.php?id=1252 Props: skippy 

git-svn-id: http://svn.automattic.com/wordpress/trunk@2542 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
ryan 2005-04-18 21:47:35 +00:00
parent 1eac787dce
commit 527e544e2f
1 changed files with 80 additions and 101 deletions
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181
wp-includes/template-functions-links.php
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@ -198,59 +198,69 @@ 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; global $post, $wpdb;
if(! is_single()) { if(! is_single()) {
return null; return null;
} }
$current_post_date = $post->post_date; $current_post_date = $post->post_date;
$current_category = $post->post_category;
$sqlcat = ''; $join = '';
if ($in_same_cat) { if ($in_same_cat) {
$sqlcat = " AND post_category = '$current_category' "; $join = " INNER JOIN $wpdb->post2cat ON $wpdb->posts.ID= $wpdb->post2cat.post_id ";
} $cat_array = get_the_category($post->ID);
$join .= ' AND (category_id = ' . intval($cat_array[0]->cat_ID);
for ($i = 1; $i < (count($cat_array)); $i++) {
$join .= ' OR category_id = ' . intval($cat_array[$i]->cat_ID);
}
$join .= ')';
}
$sql_exclude_cats = ''; $sql_exclude_cats = '';
if (!empty($excluded_categories)) { if (!empty($excluded_categories)) {
$blah = explode('and', $excluded_categories); $blah = explode('and', $excluded_categories);
foreach($blah as $category) { foreach($blah as $category) {
$category = intval($category); $category = intval($category);
$sql_exclude_cats .= " AND post_category != $category"; $sql_exclude_cats .= " AND post_category != $category";
} }
} }
return @$wpdb->get_row("SELECT ID, post_title FROM $wpdb->posts WHERE post_date < '$current_post_date' AND post_status = 'publish' $sqlcat $sql_exclude_cats ORDER BY post_date DESC LIMIT 1"); return @$wpdb->get_row("SELECT ID, post_title FROM $wpdb->posts $join WHERE post_date < '$current_post_date' AND post_status = 'publish' $sqlcat $sql_exclude_cats ORDER BY post_date DESC LIMIT 1");
} }
function get_next_post($in_same_cat = false, $excluded_categories = '') { function get_next_post($in_same_cat = false, $excluded_categories = '') {
global $post, $wpdb; global $post, $wpdb;
if(! is_single()) { if(! is_single()) {
return null; return null;
} }
$current_post_date = $post->post_date; $current_post_date = $post->post_date;
$current_category = $post->post_category;
$sqlcat = ''; $join = '';
if ($in_same_cat) { if ($in_same_cat) {
$sqlcat = " AND post_category = '$current_category' "; $join = " INNER JOIN $wpdb->post2cat ON $wpdb->posts.ID= $wpdb->post2cat.post_id ";
} $cat_array = get_the_category($post->ID);
$join .= ' AND (category_id = ' . intval($cat_array[0]->cat_ID);
for ($i = 1; $i < (count($cat_array)); $i++) {
$join .= ' OR category_id = ' . intval($cat_array[$i]->cat_ID);
}
$join .= ')';
}
$sql_exclude_cats = ''; $sql_exclude_cats = '';
if (!empty($excluded_categories)) { if (!empty($excluded_categories)) {
$blah = explode('and', $excluded_categories); $blah = explode('and', $excluded_categories);
foreach($blah as $category) { foreach($blah as $category) {
$category = intval($category); $category = intval($category);
$sql_exclude_cats .= " AND post_category != $category"; $sql_exclude_cats .= " AND post_category != $category";
} }
} }
$now = current_time('mysql'); $now = current_time('mysql');
return @$wpdb->get_row("SELECT ID,post_title FROM $wpdb->posts WHERE post_date > '$current_post_date' AND post_date < '$now' AND post_status = 'publish' $sqlcat $sql_exclude_cats AND ID != $post->ID ORDER BY post_date ASC LIMIT 1"); return @$wpdb->get_row("SELECT ID,post_title FROM $wpdb->posts $join WHERE post_date > '$current_post_date' AND post_date < '$now' AND post_status = 'publish' $sqlcat $sql_exclude_cats AND ID != $post->ID ORDER BY post_date ASC LIMIT 1");
} }
function previous_post_link($format='&laquo; %link', $link='%title', $in_same_cat = false, $excluded_categories = '') { function previous_post_link($format='&laquo; %link', $link='%title', $in_same_cat = false, $excluded_categories = '') {
@ -295,79 +305,48 @@ function next_post_link($format='%link &raquo;', $link='%title', $in_same_cat =
// Deprecated. Use previous_post_link(). // Deprecated. Use previous_post_link().
function previous_post($format='%', $previous='previous post: ', $title='yes', $in_same_cat='no', $limitprev=1, $excluded_categories='') { function previous_post($format='%', $previous='previous post: ', $title='yes', $in_same_cat='no', $limitprev=1, $excluded_categories='') {
global $id, $post, $wpdb;
global $posts, $posts_per_page, $s;
if(($posts_per_page == 1) || is_single()) { if ( empty($in_same_cat) || 'no' == $in_same_cat )
$in_same_cat = false;
else
$in_same_cat = true;
$current_post_date = $post->post_date; $post = get_previous_post($in_same_cat, $excluded_categories);
$current_category = $post->post_category;
$sqlcat = ''; if(! $post) {
if ($in_same_cat != 'no') { return;
$sqlcat = " AND post_category = '$current_category' "; }
}
$sql_exclude_cats = ''; $string = '<a href="'.get_permalink($post->ID).'">'.$previous;
if (!empty($excluded_categories)) { if ($title == 'yes') {
$blah = explode('and', $excluded_categories); $string .= apply_filters('the_title', $post->post_title, $post);
foreach($blah as $category) { }
$category = intval($category); $string .= '</a>';
$sql_exclude_cats .= " AND post_category != $category"; $format = str_replace('%', $string, $format);
} echo $format;
}
$limitprev--;
$lastpost = @$wpdb->get_row("SELECT ID, post_title FROM $wpdb->posts WHERE post_date < '$current_post_date' AND post_status = 'publish' $sqlcat $sql_exclude_cats ORDER BY post_date DESC LIMIT $limitprev, 1");
if ($lastpost) {
$string = '<a href="'.get_permalink($lastpost->ID).'">'.$previous;
if ($title == 'yes') {
$string .= apply_filters('the_title', $lastpost->post_title, $lastpost);
}
$string .= '</a>';
$format = str_replace('%', $string, $format);
echo $format;
}
}
} }
// Deprecated. Use next_post_link(). // Deprecated. Use next_post_link().
function next_post($format='%', $next='next post: ', $title='yes', $in_same_cat='no', $limitnext=1, $excluded_categories='') { function next_post($format='%', $next='next post: ', $title='yes', $in_same_cat='no', $limitnext=1, $excluded_categories='') {
global $posts_per_page, $post, $wpdb;
if(1 == $posts_per_page || is_single()) { if ( empty($in_same_cat) || 'no' == $in_same_cat )
$in_same_cat = false;
else
$in_same_cat = true;
$current_post_date = $post->post_date; $post = get_next_post($in_same_cat, $excluded_categories);
$current_category = $post->post_category;
$sqlcat = ''; if(! $post) {
if ($in_same_cat != 'no') { return;
$sqlcat = " AND post_category='$current_category' "; }
}
$sql_exclude_cats = ''; $string = '<a href="'.get_permalink($post->ID).'">'.$next;
if (!empty($excluded_categories)) { if ($title=='yes') {
$blah = explode('and', $excluded_categories); $string .= apply_filters('the_title', $post->post_title, $nextpost);
foreach($blah as $category) { }
$category = intval($category); $string .= '</a>';
$sql_exclude_cats .= " AND post_category != $category"; $format = str_replace('%', $string, $format);
} echo $format;
}
$now = current_time('mysql', 1);
$limitnext--;
$nextpost = @$wpdb->get_row("SELECT ID,post_title FROM $wpdb->posts WHERE post_date > '$current_post_date' AND post_date_gmt < '$now' AND post_status = 'publish' $sqlcat $sql_exclude_cats AND ID != $post->ID ORDER BY post_date ASC LIMIT $limitnext,1");
if ($nextpost) {
$string = '<a href="'.get_permalink($nextpost->ID).'">'.$next;
if ($title=='yes') {
$string .= apply_filters('the_title', $nextpost->post_title, $nextpost);
}
$string .= '</a>';
$format = str_replace('%', $string, $format);
echo $format;
}
}
} }
function get_pagenum_link($pagenum = 1) { function get_pagenum_link($pagenum = 1) {