considerable coding

darcs-hash:20080514145436-84dde-d0994cb35d3fe8545d3f08abeec3cdfe7559c67d.gz

TODO

++ login
++ register
+- settings
++ disallow login if user is logged in
++ disallow register if user is logged in
++ common_current_user()
++ common_logged_in()
++ session variable for login
++ post notice
++ logout
++ subscribe
++ unsubscribe
++ subscribe links on profile
+- licenses
+- header menu
+- footer menu
+- disallow direct to PHP files
+- common_local_url()
+- configuration system ($config)
+- RSS 1.0 feeds of a user's notices
+- RSS 1.0 dump of a user's notices
+- RSS 1.0 feed of all public notices
+- RDF dump of entire site
+- FOAF dump for user
+- delete a notice
+- make sure canonical usernames are unique
+- upload avatar
+- design from Open Source Web Designs
+- release 0.1
+- gettext
+- subscribe remote
+- add subscriber remote
+- send remote notice
+- receive remote notice
+- confirmation email
+- tinyurl-ification of URLs
+- jQuery for as much as possible
+- themes
+- release 0.2
+- @ messages
+- # tags
+- L: location
+- stay logged in between sessions
+- use RSS as a subscription
+- URL notices
+- image notices
+- video notices
+- audio notices
+- release 0.3
+- forward notices to Jabber
+- forward notices to other IM
+- forward notices to mobile phone
+- machine tags
+- release 0.4
+- include twitter subscriptions
+- include Pownce subscriptions
+- privacy
+- Wrap DB_DataObject with memcached caching layer
+- login throttle to prevent brute-force attacks
+- form token in login to prevent XSS
+- release 1.0
+- Atom Publishing Protocol

URLS.txt

@@ -11,6 +11,7 @@
 
 /main/login			login to site
 /main/register			register to site
+/main/settings			change account settings
 /main/recover			recover password
 /doc/				documentation
      about			about this site

actions/login.php

 <?php
 
-function handle_login() {
-	if ($_REQUEST['METHOD'] == 'POST') {
-		if (login_check_user($_REQUEST['user'], $_REQUEST['password'])) {
-			
+class LoginAction extends Action {
+	
+	function handle($args) {
+		parent::handle($args);
+		if (common_logged_in()) {
+			common_user_error(_t('Already logged in.'));
+		} else if ($this->arg('METHOD') == 'POST') {
+			$this->check_login();
 		} else {
+			$this->show_form();
 		}
-	} else {
-		if (user_logged_in()) {
+	}
+
+	function check_login() {
+		# XXX: form token in $_SESSION to prevent XSS
+		# XXX: login throttle
+		$nickname = $this->arg('nickname');
+		$password = $this->arg('password');
+		if (common_check_user($nickname, $password)) {
+			common_set_user($nickname);
+			common_redirect(common_local_url('all',
+											 array('nickname' =>
+												   $nickname)));
 		} else {
-			login_show_form();
+			$this->show_form(_t('Incorrect username or password.'));
 		}
 	}
-}
 	
-function login_show_form() {
-	html_start();
-	html_head("Login");
-	html_body();
+	function show_form($error=NULL) {
+		
+		common_show_header(_t('Login'));
+		if (!is_null($error)) {
+			common_element('div', array('class' => 'error'), $msg);
+		}
+		common_start_element('form', array('method' => 'POST',
+										   'id' => 'login',
+										   'action' => common_local_url('login')));
+		common_element('label', array('for' => 'username'),
+					   _t('Name'));
+		common_element('input', array('name' => 'username',
+									  'type' => 'text',
+									  'id' => 'username'));
+		common_element('label', array('for' => 'password'),
+					   _t('Password'));
+		common_element('input', array('name' => 'password',
+									  'type' => 'password',									  
+									  'id' => 'password'));
+		common_element('input', array('name' => 'submit',
+									  'type' => 'submit',
+									  'id' => 'submit'),
+					   _t('Login'));
+		common_element('input', array('name' => 'cancel',
+									  'type' => 'button',
+									  'id' => 'cancel'),
+					   _t('Cancel'));
+	}
 }
-	
-function login_check_user($username, $password) {
-	
-}
\ No newline at end of file

actions/logout.php

+<?php
+
+class LogoutAction extends Action {
+	function handle($args) {
+		parent::handle($args);
+		if (!common_logged_in()) {
+			common_user_error(_t('Not logged in.'));
+		} else {
+			common_set_user(NULL);
+			common_redirect(common_local_url('main'));
+		}
+	}
+}

actions/newnotice.php

+<?php
+
+class NewnoticeAction extends Action {
+	
+	function handle($args) {
+		parent::handle($args);
+		# XXX: Ajax!
+
+		if (!common_logged_in()) {
+			common_user_error(_t('Not logged in.'));
+		} else if ($this->arg('METHOD') == 'POST') {
+			if ($this->save_new_notice()) {
+				# XXX: smarter redirects
+				$user = common_current_user();
+				assert(!is_null($user)); # see if... above
+				# XXX: redirect to source
+				# XXX: use Ajax instead of a redirect
+				common_redirect(common_local_url('all',
+												 array('nickname' =>
+													   $user->nickname)));
+			} else {
+				common_server_error(_t('Problem saving notice.'));
+			}
+		} else {
+			$this->show_form();
+		}
+	}
+	
+	function save_new_notice() {
+		$user = common_current_user();
+		assert($user); # XXX: maybe an error instead...
+		$notice = DB_DataObject::factory('notice');
+		assert($notice);
+		$notice->profile_id = $user->id; # user id *is* profile id
+		$notice->content = $this->arg('content');
+		$notice->created = time();
+		return $notice->insert();
+	}
+	
+	function show_form() {
+		common_start_element('form', array('id' => 'newnotice', 'method' => 'POST',
+										   'action' => common_local_url('newnotice')));
+		common_element('span', 'nickname', $profile->nickname);
+		common_element('textarea', array('rows' => 4, 'cols' => 80, 'id' => 'content'));
+		common_element('input', array('type' => 'submit'), 'Send');
+		common_end_element('form');
+	}
+}
\ No newline at end of file

actions/register.php

+<?php
+
+class RegisterAction extends Action {
+	
+	function handle($args) {
+		parent::handle($args);
+		
+		if (common_logged_in()) {
+			common_user_error(_t('Already logged in.'));
+		} else if ($this->arg('METHOD') == 'POST') {
+			$this->try_register();
+		} else {
+			$this->show_form();
+		}
+	}
+
+	function try_register() {
+		$nickname = $this->arg('nickname');
+		$password = $this->arg('password');
+		$confirm = $this->arg('confirm');
+		$email = $this->arg('email');
+		
+		# Input scrubbing
+		
+		$nickname = common_canonical_nickname($nickname);
+		$email = common_canonical_email($email);
+		
+		if ($this->nickname_exists($nickname)) {
+			$this->show_form(_t('Username already exists.'));
+		} else if ($this->email_exists($email)) {
+			$this->show_form(_t('Email address already exists.'));
+		} else if ($password != $confirm) {
+			$this->show_form(_t('Passwords don\'t match.'));
+		} else if ($this->register_user($nickname, $password, $email)) {
+			common_set_user($nickname);
+			common_redirect(common_local_url('settings'));
+		} else {
+			$this->show_form(_t('Invalid username or password.'));
+		}
+	}
+
+	# checks if *CANONICAL* nickname exists
+	
+	function nickname_exists($nickname) {
+		$user = User::staticGet('nickname', $nickname);
+		return ($user !== false);
+	}
+
+	# checks if *CANONICAL* email exists
+	
+	function email_exists($email) {
+		$email = common_canonicalize_email($email);
+		$user = User::staticGet('email', $email);
+		return ($user !== false);
+	}
+
+	function register_user($nickname, $password, $email) {
+		# TODO: wrap this in a transaction!
+		$profile = new Profile();
+		$profile->nickname = $nickname;
+		$profile->created = time();
+		$id = $profile->insert();
+		if (!$id) {
+			return FALSE;
+		}
+		$user = new User();
+		$user->id = $id;
+		$user->nickname = $nickname;
+		$user->password = common_munge_password($password, $id);
+		$user->email = $email;
+		$user->created = time();
+		$result = $user->insert();
+		if (!$result) {
+			# Try to clean up...
+			$profile->delete();
+		}
+		return $result;
+	}
+	
+	function show_form($error=NULL) {
+		
+		common_show_header(_t('Login'));
+		common_start_element('form', array('method' => 'POST',
+										   'id' => 'login',
+										   'action' => common_local_url('login')));
+		common_element('label', array('for' => 'username'),
+					   _t('Name'));
+		common_element('input', array('name' => 'username',
+									  'type' => 'text',
+									  'id' => 'username'));
+		common_element('label', array('for' => 'password'),
+					   _t('Password'));
+		common_element('input', array('name' => 'password',
+									  'type' => 'password',									  
+									  'id' => 'password'));
+		common_element('label', array('for' => 'confirm'),
+					   _t('Confirm'));
+		common_element('input', array('name' => 'confirm',
+									  'type' => 'password',									  
+									  'id' => 'confirm'));
+		common_element('label', array('for' => 'email'),
+					   _t('Email'));
+		common_element('input', array('name' => 'email',
+									  'type' => 'text',									  
+									  'id' => 'email'));
+		common_element('input', array('name' => 'submit',
+									  'type' => 'submit',
+									  'id' => 'submit'),
+					   _t('Login'));
+		common_element('input', array('name' => 'cancel',
+									  'type' => 'button',
+									  'id' => 'cancel'),
+					   _t('Cancel'));
+	}
+}

actions/settings.php

+<?php
+
+class SettingsAction extends Action {
+	
+	function handle($args) {
+		parent::handle($args);
+		if ($this->arg('METHOD') == 'POST') {
+			$nickname = $this->arg('nickname');
+			$fullname = $this->arg('fullname');
+			$email = $this->arg('email');
+			$homepage = $this->arg('homepage');
+			$bio = $this->arg('bio');
+			$location = $this->arg('location');
+			$oldpass = $this->arg('oldpass');
+			$password = $this->arg('password');
+			$confirm = $this->arg('confirm');
+			
+			if ($password) {
+				if ($password != $confirm) {
+					$this->show_form(_t('Passwords don\'t match.'));
+				}
+			} else if (
+			
+			$error = $this->save_settings($nickname, $fullname, $email, $homepage,
+										  $bio, $location, $password);
+			if (!$error) {
+				$this->show_form(_t('Settings saved.'), TRUE);
+			} else {
+				$this->show_form($error);
+			}
+		} else {
+			$this->show_form();
+		}
+				
\ No newline at end of file

actions/shownotice.php

@@ -37,7 +37,8 @@ class ShownoticeAction extends Action {
 										'class' => 'nickname'),
 							 $profile->nickname);
 		# FIXME: URL, image, video, audio
-		common_element('span', array('class' => 'content'), $notice->content);
+		common_element('span', array('class' => 'content'),
+					   $notice->content);
 		common_element('span', array('class' => 'date'),
 					   common_date_string($notice->created));
 		common_end_element('div');

actions/showstream.php

@@ -9,34 +9,43 @@ class ShowstreamAction extends StreamAction {
 		
 		parent::handle($args);
 
-		$nickname = $this->arg('profile');
-		$profile = Profile::staticGet('nickname', strtolower($nickname));
-	
-		if (!$profile) {
-			$this->no_such_user();
-		} 
-		
-		$user = User::staticGet($profile->id);
-		
+		$nickname = common_canonicalize_nickname($this->arg('profile'));
+		$user = User::staticGet('nickname', $nickname);
+
 		if (!$user) {
-			// remote profile
 			$this->no_such_user();
+		} 
+
+		$profile = $user->getProfile();
+
+		if (!$profile) {
+			common_server_error(_t('User record exists without profile.'));
 		}
 		
 		# Looks like we're good; show the header
 		
 		common_show_header($profile->nickname);
+
+		$cur = common_current_user();
 		
-		if ($profile->id == current_user()->id) {
+		if ($cur && $profile->id == $cur->id) {
 			$this->notice_form();
 		}
 	
 		$this->show_profile($profile);
 
 		$this->show_last_notice($profile);
+
+		if ($cur) {
+			if ($cur->isSubscribed($profile)) {
+				$this->show_unsubscribe_form($profile);
+			} else {
+				$this->show_subscribe_form($profile);
+			}
+		}
 		
 		$this->show_statistics($profile);
-		
+
 		$this->show_subscriptions($profile);
 		
 		$this->show_notices($profile);
@@ -75,13 +84,33 @@ class ShowstreamAction extends StreamAction {
 			common_element('div', 'bio', $profile->bio);
 		}
 	}
+
+	function show_subscribe_form($profile) {
+		common_start_element('form', array('id' => 'subscribe', 'method' => 'POST',
+										   'action' => common_local_url('subscribe')));
+		common_element('input', array('id' => 'subscribeto',
+									  'name' => 'subscribeto',
+									  'type' => 'hidden',
+									  'value' => $profile->nickname));
+		common_element('input', array('type' => 'submit'), _t('subscribe'));
+		common_end_element('form');
+	}
+
+	function show_unsubscribe_form($profile) {
+		common_start_element('form', array('id' => 'unsubscribe', 'method' => 'POST',
+										   'action' => common_local_url('unsubscribe')));
+		common_element('input', array('id' => 'unsubscribeto',
+									  'name' => 'unsubscribeto',
+									  'type' => 'hidden',
+									  'value' => $profile->nickname));
+		common_element('input', array('type' => 'submit'), _t('unsubscribe'));
+		common_end_element('form');
+	}
 	
 	function show_subscriptions($profile) {
-
-		# XXX: add a limit
 		
+		# XXX: add a limit
 		$subs = $profile->getLink('id', 'subscription', 'subscriber');
-
 		common_start_element('div', 'subscriptions');
 		
 		$cnt = 0;
@@ -113,7 +142,7 @@ class ShowstreamAction extends StreamAction {
 															 array('profile' => $profile->nickname))
 								  'class' => 'moresubscriptions'),
 					   _t('All subscriptions'));
-		
+
 		common_end_element('div');
 	}
 
@@ -174,7 +203,8 @@ class ShowstreamAction extends StreamAction {
 		
 		while ($notice->fetch()) {
 			# FIXME: URL, image, video, audio
-			common_element('span', array('class' => 'content'), $notice->content);
+			common_element('span', array('class' => 'content'), 
+						   $notice->content);
 			common_element('span', array('class' => 'date'),
 						   common_date_string($notice->created));
 		}

actions/subscribe.php

+<?php
+
+class SubscribeAction extends Action {
+	function handle($args) {
+		parent::handle($args);
+		
+		if (!common_logged_in()) {
+			common_user_error(_t('Not logged in.'));
+			return;
+		}
+		
+		$other_nickname = $this->arg('subscribeto');
+
+		$other = User::staticGet('nickname', $other_nickname);
+		
+		if (!$other) {
+			common_user_error(_t('No such user.'));
+			return;
+		}
+		
+		$user = common_current_user();
+
+		if ($user->isSubscribed($other)) {
+			common_user_error(_t('Already subscribed!.'));
+			return;
+		}
+		
+		$sub = new Subscription();
+		$sub->subscriber = $user->id;
+		$sub->subscribed = $other->id;
+		
+		$sub->created = time();
+		
+		if (!$sub->insert()) {
+			common_server_error(_t('Couldn\'t create subscription.'));
+			return;
+		}
+		
+		common_redirect(common_local_url('all', array('nickname' =>
+													  $user->nickname)));
+	}
+}
\ No newline at end of file

actions/unsubscribe.php

+<?php
+
+class UnsubscribeAction extends Action {
+	function handle($args) {
+		parent::handle($args);
+		if (!common_logged_in()) {
+			common_user_error(_t('Not logged in.'));
+			return;
+		}
+		$other_nickname = $this->arg('unsubscribeto');
+		$other = User::staticGet('nickname', $other_nickname);
+		if (!$other) {
+			common_user_error(_t('No such user.'));
+			return;
+		}
+		
+		$user = common_current_user();
+
+		if (!$user->isSubscribed($other)) {
+			common_server_error(_t('Not subscribed!.'));
+		}
+		
+		$sub = new Subscription();
+		$sub->subscriber = $user->id;
+		$sub->subscribed = $other->id;
+		
+		if (!$sub->delete()) {
+			common_server_error(_t('Couldn\'t delete subscription.'));
+			return;
+		}
+		
+		common_redirect(common_local_url('all', array('nickname' =>
+													  $user->nickname)));
+	}
+}

classes/User.php

@@ -21,4 +21,16 @@ class User extends DB_DataObject
 
     /* the code above is auto generated do not remove the tag below */
     ###END_AUTOCODE
+	
+	function getProfile() {
+		return Profile::staticGet($this->$id);
+	}
+	
+	function isSubscribed($other) {
+		assert(!is_null($other));
+		$sub = DB_DataObject::factory('subscription');
+		$sub->subscriber = $this->id;
+		$sub->subscribed = $other->id;
+		return $sub->find();
+	}
 }

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;
+}
+