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Diffstat (limited to 'engine/lib/users.php')
| -rw-r--r-- | engine/lib/users.php | 1611 |
1 files changed, 1611 insertions, 0 deletions
diff --git a/engine/lib/users.php b/engine/lib/users.php new file mode 100644 index 000000000..a8fb9121c --- /dev/null +++ b/engine/lib/users.php @@ -0,0 +1,1611 @@ +<?php +/** + * Elgg users + * Functions to manage multiple or single users in an Elgg install + * + * @package Elgg.Core + * @subpackage DataModel.User + */ + +/// Map a username to a cached GUID +global $USERNAME_TO_GUID_MAP_CACHE; +$USERNAME_TO_GUID_MAP_CACHE = array(); + +/// Map a user code to a cached GUID +global $CODE_TO_GUID_MAP_CACHE; +$CODE_TO_GUID_MAP_CACHE = array(); + +/** + * Return the user specific details of a user by a row. + * + * @param int $guid The ElggUser guid + * + * @return mixed + * @access private + */ +function get_user_entity_as_row($guid) { + global $CONFIG; + + $guid = (int)$guid; + return get_data_row("SELECT * from {$CONFIG->dbprefix}users_entity where guid=$guid"); +} + +/** + * Create or update the entities table for a given user. + * Call create_entity first. + * + * @param int $guid The user's GUID + * @param string $name The user's display name + * @param string $username The username + * @param string $password The password + * @param string $salt A salt for the password + * @param string $email The user's email address + * @param string $language The user's default language + * @param string $code A code + * + * @return bool + * @access private + */ +function create_user_entity($guid, $name, $username, $password, $salt, $email, $language, $code) { + global $CONFIG; + + $guid = (int)$guid; + $name = sanitise_string($name); + $username = sanitise_string($username); + $password = sanitise_string($password); + $salt = sanitise_string($salt); + $email = sanitise_string($email); + $language = sanitise_string($language); + $code = sanitise_string($code); + + $row = get_entity_as_row($guid); + if ($row) { + // Exists and you have access to it + $query = "SELECT guid from {$CONFIG->dbprefix}users_entity where guid = {$guid}"; + if ($exists = get_data_row($query)) { + $query = "UPDATE {$CONFIG->dbprefix}users_entity + SET name='$name', username='$username', password='$password', salt='$salt', + email='$email', language='$language', code='$code' + WHERE guid = $guid"; + + $result = update_data($query); + if ($result != false) { + // Update succeeded, continue + $entity = get_entity($guid); + if (elgg_trigger_event('update', $entity->type, $entity)) { + return $guid; + } else { + $entity->delete(); + } + } + } else { + // Exists query failed, attempt an insert. + $query = "INSERT into {$CONFIG->dbprefix}users_entity + (guid, name, username, password, salt, email, language, code) + values ($guid, '$name', '$username', '$password', '$salt', '$email', '$language', '$code')"; + + $result = insert_data($query); + if ($result !== false) { + $entity = get_entity($guid); + if (elgg_trigger_event('create', $entity->type, $entity)) { + return $guid; + } else { + $entity->delete(); + } + } + } + } + + return false; +} + +/** + * Disables all of a user's entities + * + * @param int $owner_guid The owner GUID + * + * @return bool Depending on success + */ +function disable_user_entities($owner_guid) { + global $CONFIG; + $owner_guid = (int) $owner_guid; + if ($entity = get_entity($owner_guid)) { + if (elgg_trigger_event('disable', $entity->type, $entity)) { + if ($entity->canEdit()) { + $query = "UPDATE {$CONFIG->dbprefix}entities + set enabled='no' where owner_guid={$owner_guid} + or container_guid = {$owner_guid}"; + + $res = update_data($query); + return $res; + } + } + } + + return false; +} + +/** + * Ban a user + * + * @param int $user_guid The user guid + * @param string $reason A reason + * + * @return bool + */ +function ban_user($user_guid, $reason = "") { + global $CONFIG; + + $user_guid = (int)$user_guid; + + $user = get_entity($user_guid); + + if (($user) && ($user->canEdit()) && ($user instanceof ElggUser)) { + if (elgg_trigger_event('ban', 'user', $user)) { + // Add reason + if ($reason) { + create_metadata($user_guid, 'ban_reason', $reason, '', 0, ACCESS_PUBLIC); + } + + // clear "remember me" cookie code so user cannot login in using it + $user->code = ""; + $user->save(); + + // invalidate memcache for this user + static $newentity_cache; + if ((!$newentity_cache) && (is_memcache_available())) { + $newentity_cache = new ElggMemcache('new_entity_cache'); + } + + if ($newentity_cache) { + $newentity_cache->delete($user_guid); + } + + // Set ban flag + $query = "UPDATE {$CONFIG->dbprefix}users_entity set banned='yes' where guid=$user_guid"; + return update_data($query); + } + + return FALSE; + } + + return FALSE; +} + +/** + * Unban a user. + * + * @param int $user_guid Unban a user. + * + * @return bool + */ +function unban_user($user_guid) { + global $CONFIG; + + $user_guid = (int)$user_guid; + + $user = get_entity($user_guid); + + if (($user) && ($user->canEdit()) && ($user instanceof ElggUser)) { + if (elgg_trigger_event('unban', 'user', $user)) { + create_metadata($user_guid, 'ban_reason', '', '', 0, ACCESS_PUBLIC); + + // invalidate memcache for this user + static $newentity_cache; + if ((!$newentity_cache) && (is_memcache_available())) { + $newentity_cache = new ElggMemcache('new_entity_cache'); + } + + if ($newentity_cache) { + $newentity_cache->delete($user_guid); + } + + + $query = "UPDATE {$CONFIG->dbprefix}users_entity set banned='no' where guid=$user_guid"; + return update_data($query); + } + + return FALSE; + } + + return FALSE; +} + +/** + * Makes user $guid an admin. + * + * @param int $user_guid User guid + * + * @return bool + */ +function make_user_admin($user_guid) { + global $CONFIG; + + $user = get_entity((int)$user_guid); + + if (($user) && ($user instanceof ElggUser) && ($user->canEdit())) { + if (elgg_trigger_event('make_admin', 'user', $user)) { + + // invalidate memcache for this user + static $newentity_cache; + if ((!$newentity_cache) && (is_memcache_available())) { + $newentity_cache = new ElggMemcache('new_entity_cache'); + } + + if ($newentity_cache) { + $newentity_cache->delete($user_guid); + } + + $r = update_data("UPDATE {$CONFIG->dbprefix}users_entity set admin='yes' where guid=$user_guid"); + _elgg_invalidate_cache_for_entity($user_guid); + return $r; + } + + return FALSE; + } + + return FALSE; +} + +/** + * Removes user $guid's admin flag. + * + * @param int $user_guid User GUID + * + * @return bool + */ +function remove_user_admin($user_guid) { + global $CONFIG; + + $user = get_entity((int)$user_guid); + + if (($user) && ($user instanceof ElggUser) && ($user->canEdit())) { + if (elgg_trigger_event('remove_admin', 'user', $user)) { + + // invalidate memcache for this user + static $newentity_cache; + if ((!$newentity_cache) && (is_memcache_available())) { + $newentity_cache = new ElggMemcache('new_entity_cache'); + } + + if ($newentity_cache) { + $newentity_cache->delete($user_guid); + } + + $r = update_data("UPDATE {$CONFIG->dbprefix}users_entity set admin='no' where guid=$user_guid"); + _elgg_invalidate_cache_for_entity($user_guid); + return $r; + } + + return FALSE; + } + + return FALSE; +} + +/** + * Get the sites this user is part of + * + * @param int $user_guid The user's GUID + * @param int $limit Number of results to return + * @param int $offset Any indexing offset + * + * @return ElggSite[]|false On success, an array of ElggSites + */ +function get_user_sites($user_guid, $limit = 10, $offset = 0) { + $user_guid = (int)$user_guid; + $limit = (int)$limit; + $offset = (int)$offset; + + return elgg_get_entities_from_relationship(array( + 'site_guids' => ELGG_ENTITIES_ANY_VALUE, + 'relationship' => 'member_of_site', + 'relationship_guid' => $user_guid, + 'inverse_relationship' => FALSE, + 'type' => 'site', + 'limit' => $limit, + 'offset' => $offset, + )); +} + +/** + * Adds a user to another user's friends list. + * + * @param int $user_guid The GUID of the friending user + * @param int $friend_guid The GUID of the user to friend + * + * @return bool Depending on success + */ +function user_add_friend($user_guid, $friend_guid) { + $user_guid = (int) $user_guid; + $friend_guid = (int) $friend_guid; + if ($user_guid == $friend_guid) { + return false; + } + if (!$friend = get_entity($friend_guid)) { + return false; + } + if (!$user = get_entity($user_guid)) { + return false; + } + if ((!($user instanceof ElggUser)) || (!($friend instanceof ElggUser))) { + return false; + } + return add_entity_relationship($user_guid, "friend", $friend_guid); +} + +/** + * Removes a user from another user's friends list. + * + * @param int $user_guid The GUID of the friending user + * @param int $friend_guid The GUID of the user on the friends list + * + * @return bool Depending on success + */ +function user_remove_friend($user_guid, $friend_guid) { + $user_guid = (int) $user_guid; + $friend_guid = (int) $friend_guid; + + // perform cleanup for access lists. + $collections = get_user_access_collections($user_guid); + if ($collections) { + foreach ($collections as $collection) { + remove_user_from_access_collection($friend_guid, $collection->id); + } + } + + return remove_entity_relationship($user_guid, "friend", $friend_guid); +} + +/** + * Determines whether or not a user is another user's friend. + * + * @param int $user_guid The GUID of the user + * @param int $friend_guid The GUID of the friend + * + * @return bool + */ +function user_is_friend($user_guid, $friend_guid) { + return check_entity_relationship($user_guid, "friend", $friend_guid) !== false; +} + +/** + * Obtains a given user's friends + * + * @param int $user_guid The user's GUID + * @param string $subtype The subtype of users, if any + * @param int $limit Number of results to return (default 10) + * @param int $offset Indexing offset, if any + * + * @return ElggUser[]|false Either an array of ElggUsers or false, depending on success + */ +function get_user_friends($user_guid, $subtype = ELGG_ENTITIES_ANY_VALUE, $limit = 10, +$offset = 0) { + + return elgg_get_entities_from_relationship(array( + 'relationship' => 'friend', + 'relationship_guid' => $user_guid, + 'type' => 'user', + 'subtype' => $subtype, + 'limit' => $limit, + 'offset' => $offset + )); +} + +/** + * Obtains the people who have made a given user a friend + * + * @param int $user_guid The user's GUID + * @param string $subtype The subtype of users, if any + * @param int $limit Number of results to return (default 10) + * @param int $offset Indexing offset, if any + * + * @return ElggUser[]|false Either an array of ElggUsers or false, depending on success + */ +function get_user_friends_of($user_guid, $subtype = ELGG_ENTITIES_ANY_VALUE, $limit = 10, +$offset = 0) { + + return elgg_get_entities_from_relationship(array( + 'relationship' => 'friend', + 'relationship_guid' => $user_guid, + 'inverse_relationship' => TRUE, + 'type' => 'user', + 'subtype' => $subtype, + 'limit' => $limit, + 'offset' => $offset + )); +} + +/** + * Obtains a list of objects owned by a user's friends + * + * @param int $user_guid The GUID of the user to get the friends of + * @param string $subtype Optionally, the subtype of objects + * @param int $limit The number of results to return (default 10) + * @param int $offset Indexing offset, if any + * @param int $timelower The earliest time the entity can have been created. Default: all + * @param int $timeupper The latest time the entity can have been created. Default: all + * + * @return ElggObject[]|false An array of ElggObjects or false, depending on success + */ +function get_user_friends_objects($user_guid, $subtype = ELGG_ENTITIES_ANY_VALUE, $limit = 10, +$offset = 0, $timelower = 0, $timeupper = 0) { + + if ($friends = get_user_friends($user_guid, "", 999999, 0)) { + $friendguids = array(); + foreach ($friends as $friend) { + $friendguids[] = $friend->getGUID(); + } + return elgg_get_entities(array( + 'type' => 'object', + 'subtype' => $subtype, + 'owner_guids' => $friendguids, + 'limit' => $limit, + 'offset' => $offset, + 'container_guids' => $friendguids, + 'created_time_lower' => $timelower, + 'created_time_upper' => $timeupper + )); + } + return FALSE; +} + +/** + * Counts the number of objects owned by a user's friends + * + * @param int $user_guid The GUID of the user to get the friends of + * @param string $subtype Optionally, the subtype of objects + * @param int $timelower The earliest time the entity can have been created. Default: all + * @param int $timeupper The latest time the entity can have been created. Default: all + * + * @return int The number of objects + */ +function count_user_friends_objects($user_guid, $subtype = ELGG_ENTITIES_ANY_VALUE, +$timelower = 0, $timeupper = 0) { + + if ($friends = get_user_friends($user_guid, "", 999999, 0)) { + $friendguids = array(); + foreach ($friends as $friend) { + $friendguids[] = $friend->getGUID(); + } + return elgg_get_entities(array( + 'type' => 'object', + 'subtype' => $subtype, + 'owner_guids' => $friendguids, + 'count' => TRUE, + 'container_guids' => $friendguids, + 'created_time_lower' => $timelower, + 'created_time_upper' => $timeupper + )); + } + return 0; +} + +/** + * Displays a list of a user's friends' objects of a particular subtype, with navigation. + * + * @see elgg_view_entity_list + * + * @param int $user_guid The GUID of the user + * @param string $subtype The object subtype + * @param int $limit The number of entities to display on a page + * @param bool $full_view Whether or not to display the full view (default: true) + * @param bool $listtypetoggle Whether or not to allow you to flip to gallery mode (default: true) + * @param bool $pagination Whether to display pagination (default: true) + * @param int $timelower The earliest time the entity can have been created. Default: all + * @param int $timeupper The latest time the entity can have been created. Default: all + * + * @return string + */ +function list_user_friends_objects($user_guid, $subtype = "", $limit = 10, $full_view = true, +$listtypetoggle = true, $pagination = true, $timelower = 0, $timeupper = 0) { + + $offset = (int)get_input('offset'); + $limit = (int)$limit; + $count = (int)count_user_friends_objects($user_guid, $subtype, $timelower, $timeupper); + + $entities = get_user_friends_objects($user_guid, $subtype, $limit, $offset, + $timelower, $timeupper); + + return elgg_view_entity_list($entities, array( + 'count' => $count, + 'offset' => $offset, + 'limit' => $limit, + 'full_view' => $full_view, + 'list_type_toggle' => $listtypetoggle, + 'pagination' => $pagination, + )); +} + +/** + * Get a user object from a GUID. + * + * This function returns an ElggUser from a given GUID. + * + * @param int $guid The GUID + * + * @return ElggUser|false + */ +function get_user($guid) { + // Fixes "Exception thrown without stack frame" when db_select fails + if (!empty($guid)) { + $result = get_entity($guid); + } + + if ((!empty($result)) && (!($result instanceof ElggUser))) { + return false; + } + + if (!empty($result)) { + return $result; + } + + return false; +} + +/** + * Get user by username + * + * @param string $username The user's username + * + * @return ElggUser|false Depending on success + */ +function get_user_by_username($username) { + global $CONFIG, $USERNAME_TO_GUID_MAP_CACHE; + + // Fixes #6052. Username is frequently sniffed from the path info, which, + // unlike $_GET, is not URL decoded. If the username was not URL encoded, + // this is harmless. + $username = rawurldecode($username); + + $username = sanitise_string($username); + $access = get_access_sql_suffix('e'); + + // Caching + if ((isset($USERNAME_TO_GUID_MAP_CACHE[$username])) + && (_elgg_retrieve_cached_entity($USERNAME_TO_GUID_MAP_CACHE[$username]))) { + return _elgg_retrieve_cached_entity($USERNAME_TO_GUID_MAP_CACHE[$username]); + } + + $query = "SELECT e.* from {$CONFIG->dbprefix}users_entity u + join {$CONFIG->dbprefix}entities e on e.guid=u.guid + where u.username='$username' and $access "; + + $entity = get_data_row($query, 'entity_row_to_elggstar'); + if ($entity) { + $USERNAME_TO_GUID_MAP_CACHE[$username] = $entity->guid; + } else { + $entity = false; + } + + return $entity; +} + +/** + * Get user by session code + * + * @param string $code The session code + * + * @return ElggUser|false Depending on success + */ +function get_user_by_code($code) { + global $CONFIG, $CODE_TO_GUID_MAP_CACHE; + + $code = sanitise_string($code); + + $access = get_access_sql_suffix('e'); + + // Caching + if ((isset($CODE_TO_GUID_MAP_CACHE[$code])) + && (_elgg_retrieve_cached_entity($CODE_TO_GUID_MAP_CACHE[$code]))) { + + return _elgg_retrieve_cached_entity($CODE_TO_GUID_MAP_CACHE[$code]); + } + + $query = "SELECT e.* from {$CONFIG->dbprefix}users_entity u + join {$CONFIG->dbprefix}entities e on e.guid=u.guid + where u.code='$code' and $access"; + + $entity = get_data_row($query, 'entity_row_to_elggstar'); + if ($entity) { + $CODE_TO_GUID_MAP_CACHE[$code] = $entity->guid; + } + + return $entity; +} + +/** + * Get an array of users from an email address + * + * @param string $email Email address. + * + * @return array + */ +function get_user_by_email($email) { + global $CONFIG; + + $email = sanitise_string($email); + + $access = get_access_sql_suffix('e'); + + $query = "SELECT e.* from {$CONFIG->dbprefix}entities e + join {$CONFIG->dbprefix}users_entity u on e.guid=u.guid + where email='$email' and $access"; + + return get_data($query, 'entity_row_to_elggstar'); +} + +/** + * A function that returns a maximum of $limit users who have done something within the last + * $seconds seconds or the total count of active users. + * + * @param int $seconds Number of seconds (default 600 = 10min) + * @param int $limit Limit, default 10. + * @param int $offset Offset, default 0. + * @param bool $count Count, default false. + * + * @return mixed + */ +function find_active_users($seconds = 600, $limit = 10, $offset = 0, $count = false) { + $seconds = (int)$seconds; + $limit = (int)$limit; + $offset = (int)$offset; + $params = array('seconds' => $seconds, 'limit' => $limit, 'offset' => $offset, 'count' => $count); + $data = elgg_trigger_plugin_hook('find_active_users', 'system', $params, NULL); + if (!$data) { + global $CONFIG; + + $time = time() - $seconds; + + $data = elgg_get_entities(array( + 'type' => 'user', + 'limit' => $limit, + 'offset' => $offset, + 'count' => $count, + 'joins' => array("join {$CONFIG->dbprefix}users_entity u on e.guid = u.guid"), + 'wheres' => array("u.last_action >= {$time}"), + 'order_by' => "u.last_action desc" + )); + } + return $data; +} + +/** + * Generate and send a password request email to a given user's registered email address. + * + * @param int $user_guid User GUID + * + * @return bool + */ +function send_new_password_request($user_guid) { + $user_guid = (int)$user_guid; + + $user = get_entity($user_guid); + if ($user instanceof ElggUser) { + // generate code + $code = generate_random_cleartext_password(); + $user->setPrivateSetting('passwd_conf_code', $code); + + // generate link + $link = elgg_get_site_url() . "resetpassword?u=$user_guid&c=$code"; + + // generate email + $email = elgg_echo('email:resetreq:body', array($user->name, $_SERVER['REMOTE_ADDR'], $link)); + + return notify_user($user->guid, elgg_get_site_entity()->guid, + elgg_echo('email:resetreq:subject'), $email, array(), 'email'); + } + + return false; +} + +/** + * Low level function to reset a given user's password. + * + * This can only be called from execute_new_password_request(). + * + * @param int $user_guid The user. + * @param string $password Text (which will then be converted into a hash and stored) + * + * @return bool + */ +function force_user_password_reset($user_guid, $password) { + $user = get_entity($user_guid); + if ($user instanceof ElggUser) { + $ia = elgg_set_ignore_access(); + + $user->salt = generate_random_cleartext_password(); + $hash = generate_user_password($user, $password); + $user->password = $hash; + $result = (bool)$user->save(); + + elgg_set_ignore_access($ia); + + return $result; + } + + return false; +} + +/** + * Validate and execute a password reset for a user. + * + * @param int $user_guid The user id + * @param string $conf_code Confirmation code as sent in the request email. + * + * @return mixed + */ +function execute_new_password_request($user_guid, $conf_code) { + global $CONFIG; + + $user_guid = (int)$user_guid; + $user = get_entity($user_guid); + + if ($user instanceof ElggUser) { + $saved_code = $user->getPrivateSetting('passwd_conf_code'); + + if ($saved_code && $saved_code == $conf_code) { + $password = generate_random_cleartext_password(); + + if (force_user_password_reset($user_guid, $password)) { + remove_private_setting($user_guid, 'passwd_conf_code'); + // clean the logins failures + reset_login_failure_count($user_guid); + + $email = elgg_echo('email:resetpassword:body', array($user->name, $password)); + + return notify_user($user->guid, $CONFIG->site->guid, + elgg_echo('email:resetpassword:subject'), $email, array(), 'email'); + } + } + } + + return FALSE; +} + +/** + * Simple function that will generate a random clear text password + * suitable for feeding into generate_user_password(). + * + * @see generate_user_password + * + * @return string + */ +function generate_random_cleartext_password() { + return substr(md5(microtime() . rand()), 0, 8); +} + +/** + * Generate a password for a user, currently uses MD5. + * + * @param ElggUser $user The user this is being generated for. + * @param string $password Password in clear text + * + * @return string + */ +function generate_user_password(ElggUser $user, $password) { + return md5($password . $user->salt); +} + +/** + * Simple function which ensures that a username contains only valid characters. + * + * This should only permit chars that are valid on the file system as well. + * + * @param string $username Username + * + * @return bool + * @throws RegistrationException on invalid + */ +function validate_username($username) { + global $CONFIG; + + // Basic, check length + if (!isset($CONFIG->minusername)) { + $CONFIG->minusername = 4; + } + + if (strlen($username) < $CONFIG->minusername) { + $msg = elgg_echo('registration:usernametooshort', array($CONFIG->minusername)); + throw new RegistrationException($msg); + } + + // username in the database has a limit of 128 characters + if (strlen($username) > 128) { + $msg = elgg_echo('registration:usernametoolong', array(128)); + throw new RegistrationException($msg); + } + + // Blacklist for bad characters (partially nicked from mediawiki) + $blacklist = '/[' . + '\x{0080}-\x{009f}' . // iso-8859-1 control chars + '\x{00a0}' . // non-breaking space + '\x{2000}-\x{200f}' . // various whitespace + '\x{2028}-\x{202f}' . // breaks and control chars + '\x{3000}' . // ideographic space + '\x{e000}-\x{f8ff}' . // private use + ']/u'; + + if ( + preg_match($blacklist, $username) + ) { + // @todo error message needs work + throw new RegistrationException(elgg_echo('registration:invalidchars')); + } + + // Belts and braces + // @todo Tidy into main unicode + $blacklist2 = '\'/\\"*& ?#%^(){}[]~?<>;|¬`@-+='; + + for ($n = 0; $n < strlen($blacklist2); $n++) { + if (strpos($username, $blacklist2[$n]) !== false) { + $msg = elgg_echo('registration:invalidchars', array($blacklist2[$n], $blacklist2)); + $msg = htmlspecialchars($msg, ENT_QUOTES, 'UTF-8'); + throw new RegistrationException($msg); + } + } + + $result = true; + return elgg_trigger_plugin_hook('registeruser:validate:username', 'all', + array('username' => $username), $result); +} + +/** + * Simple validation of a password. + * + * @param string $password Clear text password + * + * @return bool + * @throws RegistrationException on invalid + */ +function validate_password($password) { + global $CONFIG; + + if (!isset($CONFIG->min_password_length)) { + $CONFIG->min_password_length = 6; + } + + if (strlen($password) < $CONFIG->min_password_length) { + $msg = elgg_echo('registration:passwordtooshort', array($CONFIG->min_password_length)); + throw new RegistrationException($msg); + } + + $result = true; + return elgg_trigger_plugin_hook('registeruser:validate:password', 'all', + array('password' => $password), $result); +} + +/** + * Simple validation of a email. + * + * @param string $address Email address + * + * @throws RegistrationException on invalid + * @return bool + */ +function validate_email_address($address) { + if (!is_email_address($address)) { + throw new RegistrationException(elgg_echo('registration:notemail')); + } + + // Got here, so lets try a hook (defaulting to ok) + $result = true; + return elgg_trigger_plugin_hook('registeruser:validate:email', 'all', + array('email' => $address), $result); +} + +/** + * Registers a user, returning false if the username already exists + * + * @param string $username The username of the new user + * @param string $password The password + * @param string $name The user's display name + * @param string $email Their email address + * @param bool $allow_multiple_emails Allow the same email address to be + * registered multiple times? + * @param int $friend_guid GUID of a user to friend once fully registered + * @param string $invitecode An invite code from a friend + * + * @return int|false The new user's GUID; false on failure + * @throws RegistrationException + */ +function register_user($username, $password, $name, $email, +$allow_multiple_emails = false, $friend_guid = 0, $invitecode = '') { + + // no need to trim password. + $username = trim($username); + $name = trim(strip_tags($name)); + $email = trim($email); + + // A little sanity checking + if (empty($username) + || empty($password) + || empty($name) + || empty($email)) { + return false; + } + + // Make sure a user with conflicting details hasn't registered and been disabled + $access_status = access_get_show_hidden_status(); + access_show_hidden_entities(true); + + if (!validate_email_address($email)) { + throw new RegistrationException(elgg_echo('registration:emailnotvalid')); + } + + if (!validate_password($password)) { + throw new RegistrationException(elgg_echo('registration:passwordnotvalid')); + } + + if (!validate_username($username)) { + throw new RegistrationException(elgg_echo('registration:usernamenotvalid')); + } + + if ($user = get_user_by_username($username)) { + throw new RegistrationException(elgg_echo('registration:userexists')); + } + + if ((!$allow_multiple_emails) && (get_user_by_email($email))) { + throw new RegistrationException(elgg_echo('registration:dupeemail')); + } + + access_show_hidden_entities($access_status); + + // Create user + $user = new ElggUser(); + $user->username = $username; + $user->email = $email; + $user->name = $name; + $user->access_id = ACCESS_PUBLIC; + $user->salt = generate_random_cleartext_password(); // Note salt generated before password! + $user->password = generate_user_password($user, $password); + $user->owner_guid = 0; // Users aren't owned by anyone, even if they are admin created. + $user->container_guid = 0; // Users aren't contained by anyone, even if they are admin created. + $user->language = get_current_language(); + $user->save(); + + // If $friend_guid has been set, make mutual friends + if ($friend_guid) { + if ($friend_user = get_user($friend_guid)) { + if ($invitecode == generate_invite_code($friend_user->username)) { + $user->addFriend($friend_guid); + $friend_user->addFriend($user->guid); + + // @todo Should this be in addFriend? + add_to_river('river/relationship/friend/create', 'friend', $user->getGUID(), $friend_guid); + add_to_river('river/relationship/friend/create', 'friend', $friend_guid, $user->getGUID()); + } + } + } + + // Turn on email notifications by default + set_user_notification_setting($user->getGUID(), 'email', true); + + return $user->getGUID(); +} + +/** + * Generates a unique invite code for a user + * + * @param string $username The username of the user sending the invitation + * + * @return string Invite code + */ +function generate_invite_code($username) { + $secret = datalist_get('__site_secret__'); + return md5($username . $secret); +} + +/** + * Set the validation status for a user. + * + * @param int $user_guid The user's GUID + * @param bool $status Validated (true) or unvalidated (false) + * @param string $method Optional method to say how a user was validated + * @return bool + * @since 1.8.0 + */ +function elgg_set_user_validation_status($user_guid, $status, $method = '') { + $result1 = create_metadata($user_guid, 'validated', $status, '', 0, ACCESS_PUBLIC, false); + $result2 = create_metadata($user_guid, 'validated_method', $method, '', 0, ACCESS_PUBLIC, false); + if ($result1 && $result2) { + return true; + } else { + return false; + } +} + +/** + * Gets the validation status of a user. + * + * @param int $user_guid The user's GUID + * @return bool|null Null means status was not set for this user. + * @since 1.8.0 + */ +function elgg_get_user_validation_status($user_guid) { + $md = elgg_get_metadata(array( + 'guid' => $user_guid, + 'metadata_name' => 'validated' + )); + if ($md == false) { + return null; + } + + if ($md[0]->value) { + return true; + } + + return false; +} + +/** + * Adds collection submenu items + * + * @return void + * @access private + */ +function collections_submenu_items() { + + $user = elgg_get_logged_in_user_entity(); + + elgg_register_menu_item('page', array( + 'name' => 'friends:view:collections', + 'text' => elgg_echo('friends:collections'), + 'href' => "collections/$user->username", + )); +} + +/** + * Page handler for friends-related pages + * + * @param array $segments URL segments + * @param string $handler The first segment in URL used for routing + * + * @return bool + * @access private + */ +function friends_page_handler($segments, $handler) { + elgg_set_context('friends'); + + if (isset($segments[0]) && $user = get_user_by_username($segments[0])) { + elgg_set_page_owner_guid($user->getGUID()); + } + if (elgg_get_logged_in_user_guid() == elgg_get_page_owner_guid()) { + collections_submenu_items(); + } + + switch ($handler) { + case 'friends': + require_once(dirname(dirname(dirname(__FILE__))) . "/pages/friends/index.php"); + break; + case 'friendsof': + require_once(dirname(dirname(dirname(__FILE__))) . "/pages/friends/of.php"); + break; + default: + return false; + } + return true; +} + +/** + * Page handler for friends collections + * + * @param array $page_elements Page elements + * + * @return bool + * @access private + */ +function collections_page_handler($page_elements) { + gatekeeper(); + elgg_set_context('friends'); + $base = elgg_get_config('path'); + if (isset($page_elements[0])) { + if ($page_elements[0] == "add") { + elgg_set_page_owner_guid(elgg_get_logged_in_user_guid()); + collections_submenu_items(); + require_once "{$base}pages/friends/collections/add.php"; + return true; + } else { + $user = get_user_by_username($page_elements[0]); + if ($user) { + elgg_set_page_owner_guid($user->getGUID()); + if (elgg_get_logged_in_user_guid() == elgg_get_page_owner_guid()) { + collections_submenu_items(); + } + require_once "{$base}pages/friends/collections/view.php"; + return true; + } + } + } + return false; +} + +/** + * Page handler for account related pages + * + * @param array $page_elements Page elements + * @param string $handler The handler string + * + * @return bool + * @access private + */ +function elgg_user_account_page_handler($page_elements, $handler) { + + $base_dir = elgg_get_root_path() . 'pages/account'; + switch ($handler) { + case 'login': + require_once("$base_dir/login.php"); + break; + case 'forgotpassword': + require_once("$base_dir/forgotten_password.php"); + break; + case 'resetpassword': + require_once("$base_dir/reset_password.php"); + break; + case 'register': + require_once("$base_dir/register.php"); + break; + default: + return false; + } + return true; +} + +/** + * Sets the last action time of the given user to right now. + * + * @param int $user_guid The user GUID + * + * @return void + */ +function set_last_action($user_guid) { + $user_guid = (int) $user_guid; + global $CONFIG; + $time = time(); + + $query = "UPDATE {$CONFIG->dbprefix}users_entity + set prev_last_action = last_action, + last_action = {$time} where guid = {$user_guid}"; + + execute_delayed_write_query($query); +} + +/** + * Sets the last logon time of the given user to right now. + * + * @param int $user_guid The user GUID + * + * @return void + */ +function set_last_login($user_guid) { + $user_guid = (int) $user_guid; + global $CONFIG; + $time = time(); + + $query = "UPDATE {$CONFIG->dbprefix}users_entity + set prev_last_login = last_login, last_login = {$time} where guid = {$user_guid}"; + + execute_delayed_write_query($query); +} + +/** + * Creates a relationship between this site and the user. + * + * @param string $event create + * @param string $object_type user + * @param ElggUser $object User object + * + * @return void + * @access private + */ +function user_create_hook_add_site_relationship($event, $object_type, $object) { + add_entity_relationship($object->getGUID(), 'member_of_site', elgg_get_site_entity()->guid); +} + +/** + * Serves the user's avatar + * + * @param string $hook + * @param string $entity_type + * @param string $returnvalue + * @param array $params + * @return string + * @access private + */ +function user_avatar_hook($hook, $entity_type, $returnvalue, $params) { + $user = $params['entity']; + $size = $params['size']; + + if (isset($user->icontime)) { + return "avatar/view/$user->username/$size/$user->icontime"; + } else { + return "_graphics/icons/user/default{$size}.gif"; + } +} + +/** + * Setup the default user hover menu + * @access private + */ +function elgg_user_hover_menu($hook, $type, $return, $params) { + $user = $params['entity']; + /* @var ElggUser $user */ + + if (elgg_is_logged_in()) { + if (elgg_get_logged_in_user_guid() != $user->guid) { + if ($user->isFriend()) { + $url = "action/friends/remove?friend={$user->guid}"; + $text = elgg_echo('friend:remove'); + $name = 'remove_friend'; + } else { + $url = "action/friends/add?friend={$user->guid}"; + $text = elgg_echo('friend:add'); + $name = 'add_friend'; + } + $url = elgg_add_action_tokens_to_url($url); + $item = new ElggMenuItem($name, $text, $url); + $item->setSection('action'); + $return[] = $item; + } else { + $url = "profile/$user->username/edit"; + $item = new ElggMenuItem('profile:edit', elgg_echo('profile:edit'), $url); + $item->setSection('action'); + $return[] = $item; + + $url = "avatar/edit/$user->username"; + $item = new ElggMenuItem('avatar:edit', elgg_echo('avatar:edit'), $url); + $item->setSection('action'); + $return[] = $item; + } + } + + // prevent admins from banning or deleting themselves + if (elgg_get_logged_in_user_guid() == $user->guid) { + return $return; + } + + if (elgg_is_admin_logged_in()) { + $actions = array(); + if (!$user->isBanned()) { + $actions[] = 'ban'; + } else { + $actions[] = 'unban'; + } + $actions[] = 'delete'; + $actions[] = 'resetpassword'; + if (!$user->isAdmin()) { + $actions[] = 'makeadmin'; + } else { + $actions[] = 'removeadmin'; + } + + foreach ($actions as $action) { + $url = "action/admin/user/$action?guid={$user->guid}"; + $url = elgg_add_action_tokens_to_url($url); + $item = new ElggMenuItem($action, elgg_echo($action), $url); + $item->setSection('admin'); + $item->setLinkClass('elgg-requires-confirmation'); + + $return[] = $item; + } + + $url = "profile/$user->username/edit"; + $item = new ElggMenuItem('profile:edit', elgg_echo('profile:edit'), $url); + $item->setSection('admin'); + $return[] = $item; + + $url = "settings/user/$user->username"; + $item = new ElggMenuItem('settings:edit', elgg_echo('settings:edit'), $url); + $item->setSection('admin'); + $return[] = $item; + } + + return $return; +} + +/** + * Setup the menu shown with an entity + * + * @param string $hook + * @param string $type + * @param array $return + * @param array $params + * @return array + * + * @access private + */ +function elgg_users_setup_entity_menu($hook, $type, $return, $params) { + if (elgg_in_context('widgets')) { + return $return; + } + + $entity = $params['entity']; + if (!elgg_instanceof($entity, 'user')) { + return $return; + } + /* @var ElggUser $entity */ + + if ($entity->isBanned()) { + $banned = elgg_echo('banned'); + $options = array( + 'name' => 'banned', + 'text' => "<span>$banned</span>", + 'href' => false, + 'priority' => 0, + ); + $return = array(ElggMenuItem::factory($options)); + } else { + $return = array(); + if (isset($entity->location)) { + $location = htmlspecialchars($entity->location, ENT_QUOTES, 'UTF-8', false); + $options = array( + 'name' => 'location', + 'text' => "<span>$location</span>", + 'href' => false, + 'priority' => 150, + ); + $return[] = ElggMenuItem::factory($options); + } + } + + return $return; +} + +/** + * This function loads a set of default fields into the profile, then triggers a hook letting other plugins to edit + * add and delete fields. + * + * Note: This is a secondary system:init call and is run at a super low priority to guarantee that it is called after all + * other plugins have initialised. + * @access private + */ +function elgg_profile_fields_setup() { + global $CONFIG; + + $profile_defaults = array ( + 'description' => 'longtext', + 'briefdescription' => 'text', + 'location' => 'location', + 'interests' => 'tags', + 'skills' => 'tags', + 'contactemail' => 'email', + 'phone' => 'text', + 'mobile' => 'text', + 'website' => 'url', + 'twitter' => 'text' + ); + + $loaded_defaults = array(); + if ($fieldlist = elgg_get_config('profile_custom_fields')) { + if (!empty($fieldlist)) { + $fieldlistarray = explode(',', $fieldlist); + foreach ($fieldlistarray as $listitem) { + if ($translation = elgg_get_config("admin_defined_profile_{$listitem}")) { + $type = elgg_get_config("admin_defined_profile_type_{$listitem}"); + $loaded_defaults["admin_defined_profile_{$listitem}"] = $type; + add_translation(get_current_language(), array("profile:admin_defined_profile_{$listitem}" => $translation)); + } + } + } + } + + if (count($loaded_defaults)) { + $CONFIG->profile_using_custom = true; + $profile_defaults = $loaded_defaults; + } + + $CONFIG->profile_fields = elgg_trigger_plugin_hook('profile:fields', 'profile', NULL, $profile_defaults); + + // register any tag metadata names + foreach ($CONFIG->profile_fields as $name => $type) { + if ($type == 'tags' || $type == 'location' || $type == 'tag') { + elgg_register_tag_metadata_name($name); + // register a tag name translation + add_translation(get_current_language(), array("tag_names:$name" => elgg_echo("profile:$name"))); + } + } +} + +/** + * Avatar page handler + * + * /avatar/edit/<username> + * /avatar/view/<username>/<size>/<icontime> + * + * @param array $page + * @return bool + * @access private + */ +function elgg_avatar_page_handler($page) { + global $CONFIG; + + $user = get_user_by_username($page[1]); + if ($user) { + elgg_set_page_owner_guid($user->getGUID()); + } + + if ($page[0] == 'edit') { + require_once("{$CONFIG->path}pages/avatar/edit.php"); + return true; + } else { + set_input('size', $page[2]); + require_once("{$CONFIG->path}pages/avatar/view.php"); + return true; + } + return false; +} + +/** + * Profile page handler + * + * @param array $page + * @return bool + * @access private + */ +function elgg_profile_page_handler($page) { + global $CONFIG; + + $user = get_user_by_username($page[0]); + elgg_set_page_owner_guid($user->guid); + + if ($page[1] == 'edit') { + require_once("{$CONFIG->path}pages/profile/edit.php"); + return true; + } + return false; +} + +/** + * Sets up user-related menu items + * + * @return void + * @access private + */ +function users_pagesetup() { + + $owner = elgg_get_page_owner_entity(); + $viewer = elgg_get_logged_in_user_entity(); + + if ($owner) { + $params = array( + 'name' => 'friends', + 'text' => elgg_echo('friends'), + 'href' => 'friends/' . $owner->username, + 'contexts' => array('friends') + ); + elgg_register_menu_item('page', $params); + + $params = array( + 'name' => 'friends:of', + 'text' => elgg_echo('friends:of'), + 'href' => 'friendsof/' . $owner->username, + 'contexts' => array('friends') + ); + elgg_register_menu_item('page', $params); + + elgg_register_menu_item('page', array( + 'name' => 'edit_avatar', + 'href' => "avatar/edit/{$owner->username}", + 'text' => elgg_echo('avatar:edit'), + 'contexts' => array('profile_edit'), + )); + + elgg_register_menu_item('page', array( + 'name' => 'edit_profile', + 'href' => "profile/{$owner->username}/edit", + 'text' => elgg_echo('profile:edit'), + 'contexts' => array('profile_edit'), + )); + } + + // topbar + if ($viewer) { + elgg_register_menu_item('topbar', array( + 'name' => 'profile', + 'href' => $viewer->getURL(), + 'text' => elgg_view('output/img', array( + 'src' => $viewer->getIconURL('topbar'), + 'alt' => $viewer->name, + 'title' => elgg_echo('profile'), + 'class' => 'elgg-border-plain elgg-transition', + )), + 'priority' => 100, + 'link_class' => 'elgg-topbar-avatar', + )); + + elgg_register_menu_item('topbar', array( + 'name' => 'friends', + 'href' => "friends/{$viewer->username}", + 'text' => elgg_view_icon('users'), + 'title' => elgg_echo('friends'), + 'priority' => 300, + )); + + elgg_register_menu_item('topbar', array( + 'name' => 'usersettings', + 'href' => "settings/user/{$viewer->username}", + 'text' => elgg_view_icon('settings') . elgg_echo('settings'), + 'priority' => 500, + 'section' => 'alt', + )); + + elgg_register_menu_item('topbar', array( + 'name' => 'logout', + 'href' => "action/logout", + 'text' => elgg_echo('logout'), + 'is_action' => TRUE, + 'priority' => 1000, + 'section' => 'alt', + )); + } +} + +/** + * Users initialisation function, which establishes the page handler + * + * @return void + * @access private + */ +function users_init() { + + elgg_register_page_handler('friends', 'friends_page_handler'); + elgg_register_page_handler('friendsof', 'friends_page_handler'); + elgg_register_page_handler('register', 'elgg_user_account_page_handler'); + elgg_register_page_handler('forgotpassword', 'elgg_user_account_page_handler'); + elgg_register_page_handler('resetpassword', 'elgg_user_account_page_handler'); + elgg_register_page_handler('login', 'elgg_user_account_page_handler'); + elgg_register_page_handler('avatar', 'elgg_avatar_page_handler'); + elgg_register_page_handler('profile', 'elgg_profile_page_handler'); + elgg_register_page_handler('collections', 'collections_page_handler'); + + elgg_register_plugin_hook_handler('register', 'menu:user_hover', 'elgg_user_hover_menu'); + + elgg_register_action('register', '', 'public'); + elgg_register_action('useradd', '', 'admin'); + elgg_register_action('friends/add'); + elgg_register_action('friends/remove'); + elgg_register_action('avatar/upload'); + elgg_register_action('avatar/crop'); + elgg_register_action('avatar/remove'); + elgg_register_action('profile/edit'); + + elgg_register_action('friends/collections/add'); + elgg_register_action('friends/collections/delete'); + elgg_register_action('friends/collections/edit'); + + elgg_register_plugin_hook_handler('entity:icon:url', 'user', 'user_avatar_hook'); + + elgg_register_action('user/passwordreset', '', 'public'); + elgg_register_action('user/requestnewpassword', '', 'public'); + + elgg_register_widget_type('friends', elgg_echo('friends'), elgg_echo('friends:widget:description')); + + // Register the user type + elgg_register_entity_type('user', ''); + + elgg_register_plugin_hook_handler('register', 'menu:entity', 'elgg_users_setup_entity_menu', 501); + + elgg_register_event_handler('create', 'user', 'user_create_hook_add_site_relationship'); +} + +/** + * Runs unit tests for ElggObject + * + * @param string $hook unit_test + * @param string $type system + * @param mixed $value Array of tests + * @param mixed $params Params + * + * @return array + * @access private + */ +function users_test($hook, $type, $value, $params) { + global $CONFIG; + $value[] = "{$CONFIG->path}engine/tests/objects/users.php"; + return $value; +} + +elgg_register_event_handler('init', 'system', 'users_init', 0); +elgg_register_event_handler('init', 'system', 'elgg_profile_fields_setup', 10000); // Ensure this runs after other plugins +elgg_register_event_handler('pagesetup', 'system', 'users_pagesetup', 0); +elgg_register_plugin_hook_handler('unit_test', 'system', 'users_test'); |