From 1c5d1c45864b86a178e10886e50c99132b4821c4 Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@prodromou.name>
Date: Wed, 14 May 2008 15:03:00 -0400
Subject: move library files to lib

darcs-hash:20080514190300-84dde-626b88c9da510c8830d2eff2d36b72f18e6353d4.gz
---
 lib/common.php | 205 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 205 insertions(+)
 create mode 100644 lib/common.php

(limited to 'lib/common.php')

diff --git a/lib/common.php b/lib/common.php
new file mode 100644
index 000000000..973b1c6e6
--- /dev/null
+++ b/lib/common.php
@@ -0,0 +1,205 @@
+<?php
+
+if (!defined('MICROBLOG')) { exit(1) }
+
+# global configuration object
+
+// default configuration, overwritten in config.php
+
+$config =
+  array('site' =>
+		array('name' => 'Just another µB'),
+		'dsn' =>
+		array('phptype' => 'mysql',
+			  'username' => 'stoica',
+			  'password' => 'apasswd',
+			  'hostspec' => 'localhost',
+			  'database' => 'thedb')
+		'dboptions' =>
+		array('debug' => 2,
+			  'portability' => DB_PORTABILITY_ALL));
+
+require_once(INSTALLDIR . '/config.php');
+require_once('DB.php');
+
+# Show a server error
+
+function common_server_error($msg) {
+	header('Status: 500 Server Error');
+	header('Content-type: text/plain');
+
+	print $msg;
+	exit();
+}
+
+# Show a user error
+function common_user_error($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($attrs)) {
+		foreach ($attrs as $name => $value) {
+			print " $name='$value'";
+		}
+	} else if (is_string($attrs)) {
+		print " class='$attrs'";
+	}
+	print '>';
+}
+
+function common_element_end($tag) {
+	print "</$tag>";
+}
+
+function common_element($tag, $attrs=NULL, $content=NULL) {
+    common_element_start($tag, $attrs);
+	if ($content) print htmlspecialchars($content);
+	common_element_end($tag);
+}
+
+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_end('head');
+	common_element_start('body');
+	common_head_menu();
+}
+
+function common_show_footer() {
+	common_foot_menu();
+	common_element_end('body');
+	common_element_end('html');
+}
+
+function common_head_menu() {
+	$user = common_current_user();
+	common_element_start('ul', 'headmenu');
+	common_menu_item(common_local_url('doc', array('title' => 'help')),
+					 _t('Help'));
+	if ($user) {
+		common_menu_item(common_local_url('all', array('nickname' => 
+													   $user->nickname)),
+						 _t('Home'));
+		common_menu_item(common_local_url('showstream', array('nickname' =>
+															  $user->nickname)),
+						 _t('Profile'),  $user->fullname || $user->nickname);
+		common_menu_item(common_local_url('settings'),
+						 _t('Settings'));
+		common_menu_item(common_local_url('logout'),
+						 _t('Logout'));
+	} else {
+		common_menu_item(common_local_url('login'),
+						 _t('Login'));
+		common_menu_item(common_local_url('register'),
+						 _t('Register'));
+	}
+	common_element_end('ul');
+}
+
+function common_foot_menu() {
+	common_element_start('ul', 'footmenu');
+	common_menu_item(common_local_url('doc', array('title' => 'about')),
+					 _t('About'));
+	common_menu_item(common_local_url('doc', array('title' => 'help')),
+					 _t('Help'));
+	common_menu_item(common_local_url('doc', array('title' => 'privacy')),
+					 _t('Privacy'));
+}
+
+function common_menu_item($url, $text, $title=NULL) {
+	$attrs['href'] = $url;
+	if ($title) {
+		$attrs['title'] = $title;
+	}
+	common_element_start('li', 'menuitem');
+	common_element('a', $attrs, $text);
+	common_element_end('li');
+}
+
+# salted, hashed passwords are stored in the DB
+
+function common_munge_password($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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