Wordpress/wp-includes/capabilities.php

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<?php
class WP_Roles {
var $roles;
var $role_objects = array();
var $role_names = array();
var $role_key;
var $use_db = true;
function WP_Roles() {
$this->_init();
}
function _init () {
global $wpdb;
global $wp_user_roles;
$this->role_key = $wpdb->prefix . 'user_roles';
if ( ! empty( $wp_user_roles ) ) {
$this->roles = $wp_user_roles;
$this->use_db = false;
} else {
$this->roles = get_option( $this->role_key );
}
if ( empty( $this->roles ) )
return;
$this->role_objects = array();
$this->role_names = array();
foreach ( (array) $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 = array() ) {
if ( isset( $this->roles[$role] ) )
return;
$this->roles[$role] = array(
'name' => $display_name,
'capabilities' => $capabilities
);
if ( $this->use_db )
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] );
if ( $this->use_db )
update_option( $this->role_key, $this->roles );
}
function add_cap( $role, $cap, $grant = true ) {
$this->roles[$role]['capabilities'][$cap] = $grant;
if ( $this->use_db )
update_option( $this->role_key, $this->roles );
}
function remove_cap( $role, $cap ) {
unset( $this->roles[$role]['capabilities'][$cap] );
if ( $this->use_db )
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 $id = 0; // Deprecated, use $ID instead.
var $caps = array();
var $cap_key;
var $roles = array();
var $allcaps = array();
var $first_name = '';
var $last_name = '';
function WP_User( $id, $name = '' ) {
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->_init_caps();
}
function _init_caps() {
global $wpdb;
$this->cap_key = $wpdb->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 ( (array) $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 ( (array) $this->roles as $oldrole )
unset( $this->caps[$oldrole] );
if ( !empty( $role ) ) {
$this->caps[$role] = true;
$this->roles = array( $role => true );
} else {
$this->roles = false;
}
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 $wpdb;
$this->user_level = array_reduce( array_keys( $this->allcaps ), array( &$this, 'level_reduction' ), 0 );
update_usermeta( $this->ID, $wpdb->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 );
}
function remove_all_caps() {
global $wpdb;
$this->caps = array();
update_usermeta( $this->ID, $this->cap_key, '' );
update_usermeta( $this->ID, $wpdb->prefix.'user_level', '' );
$this->get_role_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 ( (array) $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 ) {
case 'delete_user':
$caps[] = 'delete_users';
break;
case 'edit_user':
if ( !isset( $args[0] ) || $user_id != $args[0] ) {
$caps[] = 'edit_users';
}
break;
case 'delete_post':
$author_data = get_userdata( $user_id );
//echo "post ID: {$args[0]}<br />";
$post = get_post( $args[0] );
if ( 'page' == $post->post_type ) {
$args = array_merge( array( 'delete_page', $user_id ), $args );
return call_user_func_array( 'map_meta_cap', $args );
}
$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 ( 'publish' == $post->post_status )
$caps[] = 'delete_published_posts';
else
// If the post is draft...
$caps[] = 'delete_posts';
} else {
// The user is trying to edit someone else's post.
$caps[] = 'delete_others_posts';
// The post is published, extra cap required.
if ( 'publish' == $post->post_status )
$caps[] = 'delete_published_posts';
elseif ( 'private' == $post->post_status )
$caps[] = 'delete_private_posts';
}
break;
case 'delete_page':
$author_data = get_userdata( $user_id );
//echo "post ID: {$args[0]}<br />";
$page = get_page( $args[0] );
$page_author_data = get_userdata( $page->post_author );
//echo "current user id : $user_id, page author id: " . $page_author_data->ID . "<br />";
// If the user is the author...
if ( $user_id == $page_author_data->ID ) {
// If the page is published...
if ( $page->post_status == 'publish' )
$caps[] = 'delete_published_pages';
else
// If the page is draft...
$caps[] = 'delete_pages';
} else {
// The user is trying to edit someone else's page.
$caps[] = 'delete_others_pages';
// The page is published, extra cap required.
if ( $page->post_status == 'publish' )
$caps[] = 'delete_published_pages';
elseif ( $page->post_status == 'private' )
$caps[] = 'delete_private_pages';
}
break;
// 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] );
if ( 'page' == $post->post_type ) {
$args = array_merge( array( 'edit_page', $user_id ), $args );
return call_user_func_array( 'map_meta_cap', $args );
}
$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 ( 'publish' == $post->post_status )
$caps[] = 'edit_published_posts';
else
// If the post is draft...
$caps[] = 'edit_posts';
} else {
// The user is trying to edit someone else's post.
$caps[] = 'edit_others_posts';
// The post is published, extra cap required.
if ( 'publish' == $post->post_status )
$caps[] = 'edit_published_posts';
elseif ( 'private' == $post->post_status )
$caps[] = 'edit_private_posts';
}
break;
case 'edit_page':
$author_data = get_userdata( $user_id );
//echo "post ID: {$args[0]}<br />";
$page = get_page( $args[0] );
$page_author_data = get_userdata( $page->post_author );
//echo "current user id : $user_id, page author id: " . $page_author_data->ID . "<br />";
// If the user is the author...
if ( $user_id == $page_author_data->ID ) {
// If the page is published...
if ( 'publish' == $page->post_status )
$caps[] = 'edit_published_pages';
else
// If the page is draft...
$caps[] = 'edit_pages';
} else {
// The user is trying to edit someone else's page.
$caps[] = 'edit_others_pages';
// The page is published, extra cap required.
if ( 'publish' == $page->post_status )
$caps[] = 'edit_published_pages';
elseif ( 'private' == $page->post_status )
$caps[] = 'edit_private_pages';
}
break;
case 'read_post':
$post = get_post( $args[0] );
if ( 'page' == $post->post_type ) {
$args = array_merge( array( 'read_page', $user_id ), $args );
return call_user_func_array( 'map_meta_cap', $args );
}
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;
case 'read_page':
$page = get_page( $args[0] );
if ( 'private' != $page->post_status ) {
$caps[] = 'read';
break;
}
$author_data = get_userdata( $user_id );
$page_author_data = get_userdata( $page->post_author );
if ( $user_id == $page_author_data->ID )
$caps[] = 'read';
else
$caps[] = 'read_private_pages';
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 ) {
$current_user = wp_get_current_user();
if ( empty( $current_user ) )
return false;
$args = array_slice( func_get_args(), 1 );
$args = array_merge( array( $capability ), $args );
return call_user_func_array( array( &$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 = array() ) {
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 );
}
?>