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[Phorum] Deal more gracefully with signatures and edit messages. More improvements.

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git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1296 48356398-32a2-884e-a903-53898d9a118a
This commit is contained in:
Edward Z. Yang 2007-06-29 18:25:13 +00:00
parent 733868a76d
commit f6de73d7e7
1 changed files with 98 additions and 36 deletions
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134
plugins/phorum/htmlpurifier.php
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@ -40,26 +40,32 @@ function phorum_htmlpurifier_format($data)
foreach($data as $message_id => $message){
if(isset($message['body'])) {
if (isset($message['meta']['htmlpurifier_light'])) {
// format hook was called outside of Phorum's normal
// functions, do the abridged purification
$data[$message_id]['body'] = $purifier->purify($message['body']);
continue;
}
if (isset($_GET['purge'])) {
// purge the cache
unset($message['meta']['body_cache']);
}
if (
isset($message['meta']['body_cache']) &&
isset($message['meta']['body_cache_serial']) &&
$message['meta']['body_cache_serial'] == $cache_serial
) {
// cached version is present, bail out early
$data[$message_id]['body'] = base64_decode($message['meta']['body_cache']);
continue;
if ($message_id) {
// we're dealing with a real message, not a fake, so
// there a number of shortcuts that can be taken
if (isset($message['meta']['htmlpurifier_light'])) {
// format hook was called outside of Phorum's normal
// functions, do the abridged purification
$data[$message_id]['body'] = $purifier->purify($message['body']);
continue;
}
if (!empty($PHORUM['args']['purge'])) {
// purge the cache, must be below the following if
unset($message['meta']['body_cache']);
}
if (
isset($message['meta']['body_cache']) &&
isset($message['meta']['body_cache_serial']) &&
$message['meta']['body_cache_serial'] == $cache_serial
) {
// cached version is present, bail out early
$data[$message_id]['body'] = base64_decode($message['meta']['body_cache']);
continue;
}
}
// migration might edit this array, that's why it's defined
@ -68,37 +74,42 @@ function phorum_htmlpurifier_format($data)
// create the $body variable
if (
$message_id && // message must be real to migrate
!isset($message['meta']['body_cache_serial'])
) {
// perform migration
$fake_data = array();
list($signature, $edit_message) = phorum_htmlpurifier_remove_sig_and_editmessage($message);
$fake_data[$message_id] = $message;
$fake_data = phorum_htmlpurifier_migrate($fake_data);
$body = $fake_data[$message_id]['body'];
$body = str_replace("<phorum break>", '', $body);
$updated_message['body'] = $body; // save it in
$body .= $signature . $edit_message; // add it back in
} else {
// reverse Phorum's pre-processing
$body = $message['body'];
// order is important
$body = str_replace(array('&lt;','&gt;','&amp;'), array('<','>','&'), $body);
$body = str_replace("<phorum break>\n", "\n", $body);
$body = str_replace(array('&lt;','&gt;','&amp;'), array('<','>','&'), $body);
}
$body = $purifier->purify($body);
// dynamically update the cache
// this is inefficient on the first read, but the cache
// catches will more than make up for it
// dynamically update the cache (MUST BE DONE HERE!)
// this is inefficient because it's one db call per
// cache miss, but once the cache is in place things are
// a lot zippier.
// this should ONLY be called on read, for posting and preview
// phorum_htmlpurifier_posting should do the trick
$updated_message['meta'] = $message['meta'];
$updated_message['meta']['body_cache'] = base64_encode($body);
$updated_message['meta']['body_cache_serial'] = $cache_serial;
phorum_db_update_message($message_id, $updated_message);
if ($message_id) { // make sure it's not a fake id
$updated_message['meta'] = $message['meta'];
$updated_message['meta']['body_cache'] = base64_encode($body);
$updated_message['meta']['body_cache_serial'] = $cache_serial;
phorum_db_update_message($message_id, $updated_message);
}
// must not get overloaded until after we cache it
// must not get overloaded until after we cache it, otherwise
// we'll inadvertently change the original text
$data[$message_id]['body'] = $body;
}
@ -107,16 +118,65 @@ function phorum_htmlpurifier_format($data)
return $data;
}
// -----------------------------------------------------------------------
// This is fragile code, copied from read.php:359. It will break if
// that is changed
/**
* Generate necessary cache and serial entries when a posting action happens
* Generates a signature based on a message array
*/
function phorum_htmlpurifier_generate_sig($row) {
$phorum_sig = '';
if(isset($row["user"]["signature"])
&& isset($row['meta']['show_signature']) && $row['meta']['show_signature']==1){
$phorum_sig=trim($row["user"]["signature"]);
if(!empty($phorum_sig)){
$phorum_sig="\n\n$phorum_sig";
}
}
return $phorum_sig;
}
/**
* Generates an edit message based on a message array
*/
function phorum_htmlpurifier_generate_editmessage($row) {
$PHORUM = $GLOBALS['PHORUM'];
$editmessage = '';
if(isset($row['meta']['edit_count']) && $row['meta']['edit_count'] > 0) {
$editmessage = str_replace ("%count%", $row['meta']['edit_count'], $PHORUM["DATA"]["LANG"]["EditedMessage"]);
$editmessage = str_replace ("%lastedit%", phorum_date($PHORUM["short_date"],$row['meta']['edit_date']), $editmessage);
$editmessage = str_replace ("%lastuser%", $row['meta']['edit_username'], $editmessage);
$editmessage="\n\n\n\n$editmessage";
}
return $editmessage;
}
// End fragile code
// -----------------------------------------------------------------------
/**
* Removes the signature and edit message from a message
* @param $row Message passed by reference
*/
function phorum_htmlpurifier_remove_sig_and_editmessage(&$row) {
// attempt to remove the Phorum's pre-processing:
// we must not process the signature or editmessage
$signature = phorum_htmlpurifier_generate_sig($row);
$editmessage = phorum_htmlpurifier_generate_editmessage($row);
$row['body'] = strtr($row['body'], array($signature => '', $editmessage => ''));
return array($signature, $editmessage);
}
/**
* Indicate that data is fully HTML and not from migration, invalidate
* previous caches
* @note This function used to generate the actual cache entries, but
* since there's data missing that must be deferred to the first read
*/
function phorum_htmlpurifier_posting($message) {
$PHORUM = $GLOBALS["PHORUM"];
$fake_data = array($message);
// this is a temporary attribute
$fake_data[0]['meta']['htmlpurifier_light'] = true; // only purify, please
list($changed_message) = phorum_hook('format', $fake_data);
$message['meta']['body_cache'] = base64_encode($changed_message['body']);
unset($message['meta']['body_cache']); // invalidate the cache
$message['meta']['body_cache_serial'] = $PHORUM['mod_htmlpurifier']['body_cache_serial'];
return $message;
}
@ -205,6 +265,8 @@ function phorum_htmlpurifier_before_editor($message) {
}
function phorum_htmlpurifier_editor_after_subject() {
// don't show this message if it's a WYSIWYG editor, since it will
// then be handled automatically
if (!empty($GLOBALS['PHORUM']['mod_htmlpurifier']['wysiwyg'])) return;
?><tr><td colspan="2" style="padding:1em 0.3em;">
HTML input is <strong>on</strong>. Make sure you escape all HTML and