theprog

Well, that turned out worse than expected. bbPress dropped some character escapes and otherwise messed up formating. I’m able to post the file here for a few days until somebody else can pick up on development (fix the calender problem and other bugs that I haven’t had to deal with yet.)
https://www.andrews.edu/~geoffrey/viewlevel.txt

You got the filter_posts part right. Given that the original author’s site is still down, I have no way to contact her with my updates. Furthermore, I no longer have the original file, so I might have left a few of the changes out. Specifically, I don’t remember if the “get_currentuserinfo();” line (in should_be_hidden()) was in the original or not, now that I think of it.

Since other and I haven’t been able to contact the original author, I’ll post the complete file here:

viewlevel-1.1.3.php:

<?php
/*
Plugin Name: View Levels v.1.1.2
Plugin URI: https://www.furbona.org/viewlevel.html
Description: When posts have a custom field called "viewlevel" set, only lets users with that user level or above see the post.
Author: Kendra Burbank
Author URI: https://www.furbona.org
*/
global $show_private_message, $private_message;
global $vl_default, $show_viewlevel, $padlock_filename;

// Configuration
$show_private_message=1; // Set this to 1 if you want to show a message instead of hiding private posts completely from unauthorized viewers
$private_message="Sorry, you need to be logged in to see this post."; // The message that unauthorized viewers will see if $show_private_posts is set to 1

$vl_default=0; // The userlevel required to see posts that don't have any viewlevel specified. If set to 1 or above, unregistered users won't be
// able to see posts unless you specify vl=0 within the post.

$show_viewlevel=0; // Set this to 1 if you want to show the viewlevel you've set next to the padlock icon.
//Thanks to Dave Disser!
$padlock_filename="padlock.gif"; // Name of the padlock icon file (should be stored in wp-images/)

add_filter('the_title','post_padlock');
add_filter('the_title','error_text');
add_filter('the_content','hide_text');
add_filter('single_post_title','error_text');
add_filter('comment_url','hide_text');
add_filter('comment_excerpt','hide_text');
add_filter('comment_email','hide_text');
add_filter('comment_author','hide_text');
add_filter('comment_text','hide_text');
add_filter('the_title_rss','error_text');
add_filter('the_excerpt','hide_text');
add_filter('the_posts','filter_posts');
add_action('publish_post','find_tag',1);

function filter_posts($allposts){
global $show_private_message, $feed;
if (!empty($feed) || !$show_private_message){
if (is_array($allposts)){
foreach ($allposts as $post){
$vl=viewlevel($post->ID);
if (!should_be_hidden($post))
$goodposts[]=$post;
}
return $goodposts;
}
}
return $allposts;
}

function post_padlock($text){
global $show_viewlevel, $padlock_filename;
if ($show_viewlevel)
{
$leveltext='^{'.intval(viewlevel()).'} ';
} else {
$leveltext=" "; }
if (viewlevel()){
$text='<img src=''.$site_root.'/wp-images/'.$padlock_filename.'' border='0'/>'.$leveltext.$text;
}
return $text;
}

function hide_text($text){
if (should_be_hidden()){
$text='';
}
return $text;
}

function error_text($text){
global $private_message, $user_level;
if (should_be_hidden()){
$text=$private_message;
}
// $text = post_padlock($text);
return $text;
}

function should_be_hidden($post=0){
get_currentuserinfo();
if(!$post) global $post;
global $user_level, $comment;
$ul=intval($user_level);

$vl=viewlevel($post->ID);
if ($ul<$vl) return 1;
if($comment->comment_post_ID){
$vl=viewlevel($comment->comment_post_ID);
if ($ul<$vl) return 1;
}
return 0;
}

function viewlevel($id=0){
global $wpdb, $tablepostmeta,$vl_default;
if (!$id) global $id;
if ($id) $vl= $wpdb->get_var("SELECT meta_value FROM $tablepostmeta WHERE post_id = $id AND meta_key = 'viewlevel'");
if ($vl=="") $vl=$vl_default;
return $vl;
}

function find_tag($id){
// This is the function that looks for the vl tag in the posts you publish.
global $tablepostmeta, $wpdb,$tableposts,$post_meta_cache;
$content = $wpdb->get_var("SELECT post_content FROM $tableposts WHERE ID = '$id'");
if (preg_match('/vl=([d]*)/i',$content,$match)){
$content=addslashes($content);
$content=format_to_post(balanceTags(preg_replace('/vl=[d]*/i','',$content)));
$results=$wpdb->query("UPDATE $tableposts SET post_content = '$content' WHERE ID = $id");
if($wpdb->get_var("SELECT meta_value FROM $tablepostmeta WHERE post_id = $id AND meta_key = 'viewlevel'")){
$results= $wpdb->query("UPDATE $tablepostmeta SET meta_value = $match[1] WHERE post_id = '$id' AND meta_key = 'viewlevel'");
} else {
$results = $wpdb->query("INSERT INTO $tablepostmeta (post_id,meta_key,meta_value)
VALUES ('$id','viewlevel',$match[1])");
}
}
return $id;
}

function get_calendar_vl_safe($daylength = 1) {

// Stolen from the main calendar code

global $wpdb, $m, $monthnum, $year, $timedifference, $month, $month_abbrev, $weekday, $weekday_initial, $weekday_abbrev, $tableposts, $posts;
global $tablepostmeta,$user_level,$vl_default;

$ul=$user_level;
if(!$ul) $ul=0;

if($ul>=$vl_default){
$addtoquery="AND (meta_key IS NULL OR (meta_key = 'viewlevel' AND meta_value <= $ul))";
} else {
$addtoquery="AND (meta_key = 'viewlevel' AND meta_value <= $ul)";
}

// Quick check. If we have no posts at all, abort!
if (!$posts) {
$gotsome = $wpdb->get_var("SELECT ID from $tableposts LEFT JOIN $tablepostmeta on ID=post_id WHERE post_status = 'publish' $addtoquery ORDER BY post_date DESC LIMIT 1");
if (!$gotsome)
return;
}

if (isset($_GET['w'])) {
$w = ''.intval($_GET['w']);
}

$add_hours = intval(get_settings('gmt_offset'));
$add_minutes = intval(60 * (get_settings('gmt_offset') - $add_hours));

// Let's figure out when we are
if (!empty($monthnum) && !empty($year)) {
$thismonth = ''.zeroise(intval($monthnum), 2);
$thisyear = ''.intval($year);
} elseif (!empty($w)) {
// We need to get the month from MySQL
$thisyear = ''.intval(substr($m, 0, 4));
$d = (($w - 1) * 7) + 6; //it seems MySQL's weeks disagree with PHP's
$thismonth = $wpdb->get_var("SELECT DATE_FORMAT((DATE_ADD('${thisyear}0101', INTERVAL $d DAY) ), '%m')");
} elseif (!empty($m)) {
$calendar = substr($m, 0, 6);
$thisyear = ''.intval(substr($m, 0, 4));
if (strlen($m) < 6) {
$thismonth = '01';
} else {
$thismonth = ''.zeroise(intval(substr($m, 4, 2)), 2);
}
} else {
$thisyear = gmdate('Y', current_time('timestamp') + get_settings('gmt_offset') * 3600);
$thismonth = gmdate('m', current_time('timestamp') + get_settings('gmt_offset') * 3600);
}

$unixmonth = mktime(0, 0 , 0, $thismonth, 1, $thisyear);

// Get the next and previous month and year with at least one post
$previous = $wpdb->get_row("SELECT DISTINCT MONTH(post_date) AS month, YEAR(post_date) AS year
FROM $tableposts LEFT JOIN $tablepostmeta on ID=post_id
WHERE post_date < '$thisyear-$thismonth-01'
AND post_status = 'publish' $addtoquery
ORDER BY post_date DESC
LIMIT 1");
$next = $wpdb->get_row("SELECT DISTINCT MONTH(post_date) AS month, YEAR(post_date) AS year
FROM $tableposts LEFT JOIN $tablepostmeta on ID=post_id
WHERE post_date > '$thisyear-$thismonth-01'
AND MONTH( post_date ) != MONTH( '$thisyear-$thismonth-01' )
AND post_status = 'publish' $addtoquery
ORDER BY post_date ASC
LIMIT 1");

echo '<table id="wp-calendar">
<caption>' . $month[zeroise($thismonth, 2)] . ' ' . date('Y', $unixmonth) . '</caption>
<thead>
<tr>';

$day_abbrev = $weekday_initial;
if ($daylength > 1) {
$day_abbrev = $weekday_abbrev;
}

foreach ($weekday as $wd) {
echo "ntt<th abbr=\"$wd\" scope=\"col\" title=\"$wd\">" . $day_abbrev[$wd] . '</th>';
}

echo '
</tr>
</thead>

<tfoot>
<tr>';

if ($previous) {
echo "ntt".'<td abbr="' . $month[zeroise($previous->month, 2)] . '" colspan="3" id="prev"><a href="' .
get_month_link($previous->year, $previous->month) . '" title="' . sprintf(__('View posts for %1$s %2$s'), $month[zeroise($previous->month, 2)], date('Y', mktime(0, 0 , 0, $previous->month, 1, $previous->year))) . '">&laquo; ' . $month_abbrev[$month[zeroise($previous->month, 2)]] . '</a></td>';
} else {
echo "ntt".'<td colspan="3" id="prev" class="pad">&nbsp;</td>';
}

echo "ntt".'<td class="pad">&nbsp;</td>';

if ($next) {
echo "ntt".'<td abbr="' . $month[zeroise($next->month, 2)] . '" colspan="3" id="next"><a href="' .
get_month_link($next->year, $next->month) . '" title="View posts for ' . $month[zeroise($next->month, 2)] . ' ' .
date('Y', mktime(0, 0 , 0, $next->month, 1, $next->year)) . '">' . substr($month[zeroise($next->month, 2)], 0, 3) . ' &raquo;</a></td>';
} else {
echo "ntt".'<td colspan="3" id="next" class="pad">&nbsp;</td>';
}

echo '
</tr>
</tfoot>

<tbody>
<tr>';

// Get days with posts
$dayswithposts = $wpdb->get_results("SELECT DISTINCT DAYOFMONTH(post_date)
FROM $tableposts LEFT JOIN $tablepostmeta on ID=post_id WHERE MONTH(post_date) = $thismonth
AND YEAR(post_date) = $thisyear
AND post_status = 'publish' $addtoquery
AND post_date < '" . current_time('mysql') . ''', ARRAY_N);
if ($dayswithposts) {
foreach ($dayswithposts as $daywith) {
$daywithpost[] = $daywith[0];
}
} else {
$daywithpost = array();
}

if (strstr($_SERVER['HTTP_USER_AGENT'], 'MSIE') ||
strstr(strtolower($_SERVER['HTTP_USER_AGENT']), 'camino') ||
strstr(strtolower($_SERVER['HTTP_USER_AGENT']), 'safari')) {
$ak_title_separator = "n";
} else {
$ak_title_separator = ', ';
}

$ak_titles_for_day = array();
$ak_post_titles = $wpdb->get_results("SELECT post_title, DAYOFMONTH(post_date) as dom "
."FROM $tableposts LEFT JOIN $tablepostmeta on ID=post_id "
."WHERE YEAR(post_date) = '$thisyear' "
."AND MONTH(post_date) = '$thismonth' "
."AND post_date < '".current_time('mysql')."' "
."AND post_status = 'publish' $addtoquery"
);
if ($ak_post_titles) {
foreach ($ak_post_titles as $ak_post_title) {
if (empty($ak_titles_for_day['day_'.$ak_post_title->dom])) {
$ak_titles_for_day['day_'.$ak_post_title->dom] = '';
}
if (empty($ak_titles_for_day["$ak_post_title->dom"])) { // first one
$ak_titles_for_day["$ak_post_title->dom"] = htmlspecialchars(stripslashes($ak_post_title->post_title));
} else {
$ak_titles_for_day["$ak_post_title->dom"] .= $ak_title_separator . htmlspecialchars(stripslashes($ak_post_title->post_title));
}
}
}

// See how much we should pad in the beginning
$pad = intval(date('w', $unixmonth));
if (0 != $pad) echo "ntt".'<td colspan="'.$pad.'" class="pad">&nbsp;</td>';

$daysinmonth = intval(date('t', $unixmonth));
for ($day = 1; $day <= $daysinmonth; ++$day) {
if (isset($newrow) && $newrow)
echo "nt</tr>nt<tr>ntt";
$newrow = false;

if ($day == gmdate('j', (time() + (get_settings('gmt_offset') * 3600))) && $thismonth == gmdate('m', time()+(get_settings('gmt_offset') * 3600)))
echo '<td id="today">';
else
echo '<td>';

if (in_array($day, $daywithpost)) { // any posts today?
echo '<a href="' . get_day_link($thisyear, $thismonth, $day) . "\" title=\"$ak_titles_for_day[$day]\">$day</a>";
} else {
echo $day;
}
echo '</td>';

if (6 == date('w', mktime(0, 0 , 0, $thismonth, $day, $thisyear)))
$newrow = true;
}

$pad = 7 - date('w', mktime(0, 0 , 0, $thismonth, $day, $thisyear));
if ($pad != 0 && $pad != 7)
echo "ntt".'<td class="pad" colspan="'.$pad.'">&nbsp;</td>';

echo "nt</tr>nt</tbody>nt</table>";
}

?>

I’ve gotten the thing working.
I’d post the updated file somewhere, but I’m not certain of the original license on the plugin. Here’s the changes
1. The ‘filter_posts…’ line is no longer needed in wp-blog-header.php
2. Replace the ‘wp_head’ filter with ‘the_posts’
3. Replace the filter_posts function with this one:

function filter_posts($allposts){
global $show_private_message, $feed;
if (!empty($feed) || !$show_private_message){
if (is_array($allposts)){
foreach ($allposts as $post){
$vl=viewlevel($post->ID);
if (!should_be_hidden($post))
$goodposts[]=$post;
}
return $goodposts;
}
}
return $allposts;
}


The only questionable part of this code is that WP is updating the post caches after the posts are filtered. Perhaps the caching should be done afterwards, or perhaps a second filter should be added after caches are generated.