Don't hit the database twice per comment on package

It's performance improvement day today. For non-superusers, we were hitting
the database twice per comment on a package- once to get the UID, and once
to check the owner of the comment. The best part is we already knew the
owner of the comment, and we only need to get our own UID once.

For viewing a package like yaourt, this cuts a single pageview from over 700
queries to around 18, which is still not great but a pretty big improvement.

Signed-off-by: Dan McGee <dan@archlinux.org>
Signed-off-by: Loui Chang <louipc.ist@gmail.com>

3 files changed, 19 insertions, 6 deletions

diff --git a/web/html/pkgedit.php b/web/html/pkgedit.php
index 3b1c8257..5a711d04 100644
--- a/web/html/pkgedit.php
+++ b/web/html/pkgedit.php
@@ -35,9 +35,9 @@ if (!$_REQUEST["ID"]) {
 #
 if ($_REQUEST["del_Comment"]) {
 	if ($_REQUEST["comment_id"]) {
-		if (canDeleteComment($_REQUEST["comment_id"], $atype, $_COOKIE["AURSID"])) {
+		$uid = uid_from_sid($_COOKIE["AURSID"]);
+		if (canDeleteComment($_REQUEST["comment_id"], $atype, $uid)) {
 			$dbh = db_connect();
-			$uid = uid_from_sid($_COOKIE["AURSID"]);
 			$q = "UPDATE PackageComments ";
 			$q.= "SET DelUsersID = ".$uid." ";
 			$q.= "WHERE ID = ".intval($_REQUEST["comment_id"]);
diff --git a/web/lib/pkgfuncs.inc b/web/lib/pkgfuncs.inc
index 6ce96159..056552b9 100644
--- a/web/lib/pkgfuncs.inc
+++ b/web/lib/pkgfuncs.inc
@@ -8,13 +8,11 @@ $pkgsearch_vars = array("O", "L", "C", "K", "SB", "SO", "PP", "do_Orphans", "SeB
 # Make sure this visitor can delete the requested package comment
 # They can delete if they were the comment submitter, or if they are a TU/Dev
 #
-function canDeleteComment($comment_id=0, $atype="", $SID="") {
+function canDeleteComment($comment_id=0, $atype="", $uid=0) {
 	if ($atype == "Trusted User" || $atype == "Developer") {
 		# A TU/Dev can delete any comment
-		#
 		return TRUE;
 	}
-	$uid = uid_from_sid($SID);
 	$dbh = db_connect();
 	$q = "SELECT COUNT(ID) AS CNT ";
 	$q.= "FROM PackageComments ";
@@ -30,6 +28,20 @@ function canDeleteComment($comment_id=0, $atype="", $SID="") {
 	return FALSE;
 }
 
+# Make sure this visitor can delete the requested package comment
+# They can delete if they were the comment submitter, or if they are a TU/Dev
+#
+function canDeleteCommentArray($comment, $atype="", $uid=0) {
+	if ($atype == "Trusted User" || $atype == "Developer") {
+		# A TU/Dev can delete any comment
+		return TRUE;
+	} else if ($comment['UsersID'] == $uid) {
+		# User's own comment
+		return TRUE;
+	}
+	return FALSE;
+}
+
 # see if this Users.ID can manage the package
 #
 function canManagePackage($uid=0,$AURMUID=0, $MUID=0, $SUID=0, $managed=0) {
diff --git a/web/template/pkg_comments.php b/web/template/pkg_comments.php
index 20cd2787..7c42ac16 100644
--- a/web/template/pkg_comments.php
+++ b/web/template/pkg_comments.php
@@ -1,8 +1,9 @@
 <div class="pgbox">
 <?php
+$uid = uid_from_sid($SID);
 while (list($indx, $carr) = each($comments)) { ?>
 	<div class="comment-header"><?php
-	if (canDeleteComment($carr['ID'], $atype, $SID)) {
+	if (canDeleteCommentArray($carr, $atype, $uid)) {
 		$durl = '<a href="pkgedit.php?del_Comment=1';
 		$durl.= '&comment_id=' . $carr['ID'] . '&ID=' . $row['ID'];
 		$durl.= '"><img src="images/x.png" border="0"';