From 67a347bafb875be60e7554f308d80d7f0a1d2747 Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@prodromou.name>
Date: Wed, 14 May 2008 10:54:36 -0400
Subject: considerable coding

darcs-hash:20080514145436-84dde-d0994cb35d3fe8545d3f08abeec3cdfe7559c67d.gz
---
 common.php | 104 ++++++++++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 85 insertions(+), 19 deletions(-)

(limited to 'common.php')

diff --git a/common.php b/common.php
index a6061920d..de0529a2e 100644
--- a/common.php
+++ b/common.php
@@ -5,7 +5,7 @@
 // default configuration, overwritten in config.php
 
 $config =
-  array('site' => 
+  array('site' =>
 		array('name' => 'Just another µB'),
 		'dsn' =>
 		array('phptype' => 'mysql',
@@ -20,20 +20,7 @@ $config =
 require_once(INSTALLDIR . '/config.php');
 require_once('DB.php');
 
-function common_database() {
-	global $config;
-	$db =& DB::connect($config['dsn'], $config['dboptions']);
-	if (PEAR::isError($db)) {
-		common_server_error($db->getMessage());
-	} else {
-		return $db;
-	}
-}
-
-function common_read_database() {
-	// XXX: read from slave server
-	return common_database();
-}
+# Show a server error
 
 function common_server_error($msg) {
 	header('Status: 500 Server Error');
@@ -43,12 +30,14 @@ function common_server_error($msg) {
 	exit();
 }
 
-function common_user_error($msg) {
+# Show a user error
+function common_user_error($msg, $code=200) {
 	common_show_header('Error');
 	common_element('div', array('class' => 'error'), $msg);
 	common_show_footer();
 }
 
+# Start an HTML element
 function common_element_start($tag, $attrs=NULL) {
 	print "<$tag";
 	if (is_array($attrs)) {
@@ -67,7 +56,7 @@ function common_element_end($tag) {
 
 function common_element($tag, $attrs=NULL, $content=NULL) {
     common_element_start($tag, $attrs);
-	if ($content) print $content;
+	if ($content) print htmlspecialchars($content);
 	common_element_end($tag);
 }
 
@@ -75,7 +64,8 @@ function common_show_header($pagetitle) {
 	global $config;
 	common_element_start('html');
 	common_element_start('head');
-	common_element('title', NULL, $pagetitle . " - " . $config['site']['name']);
+	common_element('title', NULL, 
+				   $pagetitle . " - " . $config['site']['name']);
 	common_element_end('head');
 	common_element_start('body');
 }
@@ -85,6 +75,82 @@ function common_show_footer() {
 	common_element_end('html');
 }
 
-// TODO: set up gettext
+# salted, hashed passwords are stored in the DB
+
+function common_munge_password($id, $password) {
+	return md5($id . $password);
+}
+
+# check if a username exists and has matching password
+function common_check_user($nickname, $password) {
+	$user = User::staticGet('nickname', $nickname);
+	if (is_null($user)) {
+		return false;
+	} else {
+		return (0 == strcmp(common_munge_password($password, $user->id), 
+							$user->password));
+	}
+}
+
+# is the current user logged in?
+function common_logged_in() {
+	return (!is_null(common_current_user()));
+}
+
+function common_have_session() {
+	return (0 != strcmp(session_id(), ''));
+}
+
+function common_ensure_session() {
+	if (!common_have_session()) {
+		@session_start();
+	}
+}
+
+function common_set_user($nickname) {
+	if (is_null($nickname) && common_have_session()) {
+		unset($_SESSION['userid']);
+		return true;
+	} else {
+		$user = User::staticGet('nickname', $nickname);
+		if ($user) {
+			common_ensure_session();
+			$_SESSION['userid'] = $user->id;
+			return true;
+		} else {
+			return false;
+		}
+	}
+	return false;
+}
+
+# who is the current user?
+function common_current_user() {
+	static $user = NULL; # FIXME: global memcached
+	if (is_null($user)) {
+		if (common_have_session()) {
+			$id = $_SESSION['userid'];
+			if ($id) {
+				$user = User::staticGet($id);
+			}
+		}
+	}
+	return $user;
+}
+
+# get canonical version of nickname for comparison
+function common_canonical_nickname($nickname) {
+	# XXX: UTF-8 canonicalization (like combining chars)
+	return strtolower($nickname);
+}
+
+function common_render_content($text) {
+	# XXX: @ messages
+	# XXX: # tags
+	# XXX: machine tags
+	return htmlspecialchars($text);
+}
+
+// XXX: set up gettext
 
 function _t($str) { $str }
-- 
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