Viewing file:  capabilities.php (10.87 KB) -rw-rw-rw-
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<?php
class WP_Roles {
var $roles;
var $role_objects = array();
var $role_names = array();
var $role_key;
function WP_Roles() {
global $table_prefix;
$this->role_key = $table_prefix . 'user_roles';
$this->roles = get_option($this->role_key);
if ( empty($this->roles) )
return;
foreach ($this->roles as $role => $data) {
$this->role_objects[$role] = new WP_Role($role, $this->roles[$role]['capabilities']);
$this->role_names[$role] = $this->roles[$role]['name'];
}
}
function add_role($role, $display_name, $capabilities = '') {
if ( isset($this->roles[$role]) )
return;
$this->roles[$role] = array(
'name' => $display_name,
'capabilities' => $capabilities);
update_option($this->role_key, $this->roles);
$this->role_objects[$role] = new WP_Role($role, $capabilities);
$this->role_names[$role] = $display_name;
return $this->role_objects[$role];
}
function remove_role($role) {
if ( ! isset($this->role_objects[$role]) )
return;
unset($this->role_objects[$role]);
unset($this->role_names[$role]);
unset($this->roles[$role]);
update_option($this->role_key, $this->roles);
}
function add_cap($role, $cap, $grant = true) {
$this->roles[$role]['capabilities'][$cap] = $grant;
update_option($this->role_key, $this->roles);
}
function remove_cap($role, $cap) {
unset($this->roles[$role]['capabilities'][$cap]);
update_option($this->role_key, $this->roles);
}
function &get_role($role) {
if ( isset($this->role_objects[$role]) )
return $this->role_objects[$role];
else
return null;
}
function get_names() {
return $this->role_names;
}
function is_role($role)
{
return isset($this->role_names[$role]);
}
}
class WP_Role {
var $name;
var $capabilities;
function WP_Role($role, $capabilities) {
$this->name = $role;
$this->capabilities = $capabilities;
}
function add_cap($cap, $grant = true) {
global $wp_roles;
if ( ! isset($wp_roles) )
$wp_roles = new WP_Roles();
$this->capabilities[$cap] = $grant;
$wp_roles->add_cap($this->name, $cap, $grant);
}
function remove_cap($cap) {
global $wp_roles;
if ( ! isset($wp_roles) )
$wp_roles = new WP_Roles();
unset($this->capabilities[$cap]);
$wp_roles->remove_cap($this->name, $cap);
}
function has_cap($cap) {
$capabilities = apply_filters('role_has_cap', $this->capabilities, $cap, $this->name);
if ( !empty($capabilities[$cap]) )
return $capabilities[$cap];
else
return false;
}
}
class WP_User {
var $data;
var $id = 0;
var $caps = array();
var $cap_key;
var $roles = array();
var $allcaps = array();
function WP_User($id, $name = '') {
global $table_prefix;
if ( empty($id) && empty($name) )
return;
if ( ! is_numeric($id) ) {
$name = $id;
$id = 0;
}
if ( ! empty($id) )
$this->data = get_userdata($id);
else
$this->data = get_userdatabylogin($name);
if ( empty($this->data->ID) )
return;
foreach (get_object_vars($this->data) as $key => $value) {
$this->{$key} = $value;
}
$this->id = $this->ID;
$this->cap_key = $table_prefix . 'capabilities';
$this->caps = &$this->{$this->cap_key};
if ( ! is_array($this->caps) )
$this->caps = array();
$this->get_role_caps();
}
function get_role_caps() {
global $wp_roles;
if ( ! isset($wp_roles) )
$wp_roles = new WP_Roles();
//Filter out caps that are not role names and assign to $this->roles
if(is_array($this->caps))
$this->roles = array_filter(array_keys($this->caps), array(&$wp_roles, 'is_role'));
//Build $allcaps from role caps, overlay user's $caps
$this->allcaps = array();
foreach($this->roles as $role) {
$role = $wp_roles->get_role($role);
$this->allcaps = array_merge($this->allcaps, $role->capabilities);
}
$this->allcaps = array_merge($this->allcaps, $this->caps);
}
function add_role($role) {
$this->caps[$role] = true;
update_usermeta($this->id, $this->cap_key, $this->caps);
$this->get_role_caps();
$this->update_user_level_from_caps();
}
function remove_role($role) {
if ( empty($this->roles[$role]) || (count($this->roles) <= 1) )
return;
unset($this->caps[$role]);
update_usermeta($this->id, $this->cap_key, $this->caps);
$this->get_role_caps();
}
function set_role($role) {
foreach($this->roles as $oldrole)
unset($this->caps[$oldrole]);
$this->caps[$role] = true;
$this->roles = array($role => true);
update_usermeta($this->id, $this->cap_key, $this->caps);
$this->get_role_caps();
$this->update_user_level_from_caps();
}
function level_reduction($max, $item) {
if(preg_match('/^level_(10|[0-9])$/i', $item, $matches)) {
$level = intval($matches[1]);
return max($max, $level);
} else {
return $max;
}
}
function update_user_level_from_caps() {
global $table_prefix;
$this->user_level = array_reduce(array_keys($this->allcaps), array(&$this, 'level_reduction'), 0);
update_usermeta($this->id, $table_prefix.'user_level', $this->user_level);
}
function add_cap($cap, $grant = true) {
$this->caps[$cap] = $grant;
update_usermeta($this->id, $this->cap_key, $this->caps);
}
function remove_cap($cap) {
if ( empty($this->caps[$cap]) ) return;
unset($this->caps[$cap]);
update_usermeta($this->id, $this->cap_key, $this->caps);
}
//has_cap(capability_or_role_name) or
//has_cap('edit_post', post_id)
function has_cap($cap) {
if ( is_numeric($cap) )
$cap = $this->translate_level_to_cap($cap);
$args = array_slice(func_get_args(), 1);
$args = array_merge(array($cap, $this->id), $args);
$caps = call_user_func_array('map_meta_cap', $args);
// Must have ALL requested caps
$capabilities = apply_filters('user_has_cap', $this->allcaps, $caps, $args);
foreach ($caps as $cap) {
//echo "Checking cap $cap<br/>";
if(empty($capabilities[$cap]) || !$capabilities[$cap])
return false;
}
return true;
}
function translate_level_to_cap($level) {
return 'level_' . $level;
}
}
// Map meta capabilities to primitive capabilities.
function map_meta_cap($cap, $user_id) {
$args = array_slice(func_get_args(), 2);
$caps = array();
switch ($cap) {
// edit_post breaks down to edit_posts, edit_published_posts, or
// edit_others_posts
case 'edit_post':
$author_data = get_userdata($user_id);
//echo "post ID: {$args[0]}<br/>";
$post = get_post($args[0]);
$post_author_data = get_userdata($post->post_author);
//echo "current user id : $user_id, post author id: " . $post_author_data->ID . "<br/>";
// If the user is the author...
if ($user_id == $post_author_data->ID) {
// If the post is published...
if ($post->post_status == 'publish')
$caps[] = 'edit_published_posts';
else if ($post->post_status == 'static')
$caps[] = 'edit_pages';
else
// If the post is draft...
$caps[] = 'edit_posts';
} else {
if ($post->post_status == 'static') {
$caps[] = 'edit_pages';
break;
}
// The user is trying to edit someone else's post.
$caps[] = 'edit_others_posts';
// The post is published, extra cap required.
if ($post->post_status == 'publish')
$caps[] = 'edit_published_posts';
}
break;
case 'read_post':
$post = get_post($args[0]);
if ( 'private' != $post->post_status ) {
$caps[] = 'read';
break;
}
$author_data = get_userdata($user_id);
$post_author_data = get_userdata($post->post_author);
if ($user_id == $post_author_data->ID)
$caps[] = 'read';
else
$caps[] = 'read_private_posts';
break;
default:
// If no meta caps match, return the original cap.
$caps[] = $cap;
}
return $caps;
}
// Capability checking wrapper around the global $current_user object.
function current_user_can($capability) {
global $current_user;
$args = array_slice(func_get_args(), 1);
$args = array_merge(array($capability), $args);
if ( empty($current_user) )
return false;
return call_user_func_array(array(&$current_user, 'has_cap'), $args);
}
// Convenience wrappers around $wp_roles.
function get_role($role) {
global $wp_roles;
if ( ! isset($wp_roles) )
$wp_roles = new WP_Roles();
return $wp_roles->get_role($role);
}
function add_role($role, $display_name, $capabilities = '') {
global $wp_roles;
if ( ! isset($wp_roles) )
$wp_roles = new WP_Roles();
return $wp_roles->add_role($role, $display_name, $capabilities);
}
function remove_role($role) {
global $wp_roles;
if ( ! isset($wp_roles) )
$wp_roles = new WP_Roles();
return $wp_roles->remove_role($role);
}
//
// These are deprecated. Use current_user_can().
//
/* returns true if $user_id can create a new post */
function user_can_create_post($user_id, $blog_id = 1, $category_id = 'None') {
$author_data = get_userdata($user_id);
return ($author_data->user_level > 1);
}
/* returns true if $user_id can create a new post */
function user_can_create_draft($user_id, $blog_id = 1, $category_id = 'None') {
$author_data = get_userdata($user_id);
return ($author_data->user_level >= 1);
}
/* returns true if $user_id can edit $post_id */
function user_can_edit_post($user_id, $post_id, $blog_id = 1) {
$author_data = get_userdata($user_id);
$post = get_post($post_id);
$post_author_data = get_userdata($post->post_author);
if ( (($user_id == $post_author_data->ID) && !($post->post_status == 'publish' && $author_data->user_level < 2))
|| ($author_data->user_level > $post_author_data->user_level)
|| ($author_data->user_level >= 10) ) {
return true;
} else {
return false;
}
}
/* returns true if $user_id can delete $post_id */
function user_can_delete_post($user_id, $post_id, $blog_id = 1) {
// right now if one can edit, one can delete
return user_can_edit_post($user_id, $post_id, $blog_id);
}
/* returns true if $user_id can set new posts' dates on $blog_id */
function user_can_set_post_date($user_id, $blog_id = 1, $category_id = 'None') {
$author_data = get_userdata($user_id);
return (($author_data->user_level > 4) && user_can_create_post($user_id, $blog_id, $category_id));
}
/* returns true if $user_id can edit $post_id's date */
function user_can_edit_post_date($user_id, $post_id, $blog_id = 1) {
$author_data = get_userdata($user_id);
return (($author_data->user_level > 4) && user_can_edit_post($user_id, $post_id, $blog_id));
}
/* returns true if $user_id can edit $post_id's comments */
function user_can_edit_post_comments($user_id, $post_id, $blog_id = 1) {
// right now if one can edit a post, one can edit comments made on it
return user_can_edit_post($user_id, $post_id, $blog_id);
}
/* returns true if $user_id can delete $post_id's comments */
function user_can_delete_post_comments($user_id, $post_id, $blog_id = 1) {
// right now if one can edit comments, one can delete comments
return user_can_edit_post_comments($user_id, $post_id, $blog_id);
}
function user_can_edit_user($user_id, $other_user) {
$user = get_userdata($user_id);
$other = get_userdata($other_user);
if ( $user->user_level > $other->user_level || $user->user_level > 8 || $user->ID == $other->ID )
return true;
else
return false;
}
?>
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