<?php
$_user_classes = array();

class UserClass {
	var $name = null;
	var $parent = null;
	var $abilities = array();

	public function __construct($name, $parent=null, $abilities=array()) {
		global $_user_classes;

		$this->name = $name;
		$this->abilities = $abilities;

		if(!is_null($parent)) {
			$this->parent = $_user_classes[$parent];
		}

		$_user_classes[$name] = $this;
	}

	public function can(/*string*/ $ability) {
		global $config;

		if(array_key_exists($ability, $this->abilities)) {
			$val = $this->abilities[$ability];
			return $val;
		}
		else if(!is_null($this->parent)) {
			return $this->parent->can($ability);
		}
		else {
			die("Unknown ability: ".html_escape($ability));
		}
	}
}

// action_object_attribute
// action = create / view / edit / delete
// object = image / user / tag / setting
new UserClass("base", null, array(
	"change_setting" => False,  # modify web-level settings, eg the config table
	"override_config" => False, # modify sys-level settings, eg config.php
	"big_search" => False,      # search for more than 3 tags at once (speed mode only)

	"manage_extension_list" => False,
	"manage_alias_list" => False,
	"mass_tag_edit" => False,

	"view_ip" => False,         # view IP addresses associated with things
	"ban_ip" => False,

	"edit_user_password" => False,
	"edit_user_info" => False,  # email address, etc
	"delete_user" => False,

	"create_comment" => False,
	"delete_comment" => False,

	"replace_image" => False,
	"create_image" => False,
	"edit_image_tag" => False,
	"edit_image_source" => False,
	"edit_image_owner" => False,
	"edit_image_lock" => False,
	"delete_image" => False,

	"create_image_report" => False,
	"view_image_report" => False,  # deal with reported images

	"edit_wiki_page" => False,
	"delete_wiki_page" => False,

	"manage_blocks" => False,

	"protected" => False,          # only admins can modify protected users (stops a moderator changing an admin's password)
));

new UserClass("anonymous", "base", array(
));

new UserClass("user", "base", array(
	"big_search" => True,
	"create_image" => True,
	"create_comment" => True,
	"edit_image_tag" => True,
	"edit_image_source" => True,
	"create_image_report" => True,
));

new UserClass("admin", "base", array(
	"change_setting" => True,
	"override_config" => True,
	"big_search" => True,
	"edit_image_lock" => True,
	"view_ip" => True,
	"ban_ip" => True,
	"edit_user_password" => True,
	"edit_user_info" => True,
	"delete_user" => True,
	"create_image" => True,
	"delete_image" => True,
	"create_comment" => True,
	"delete_comment" => True,
	"replace_image" => True,
	"manage_extension_list" => True,
	"manage_alias_list" => True,
	"edit_image_tag" => True,
	"edit_image_source" => True,
	"edit_image_owner" => True,
	"mass_tag_edit" => True,
	"create_image_report" => True,
	"view_image_report" => True,
	"edit_wiki_page" => True,
	"delete_wiki_page" => True,
	"manage_blocks" => True,
	"protected" => True,
));

if(file_exists("data/config/user-classes.conf.php")) {
	require_once("data/config/user-classes.conf.php");
}
?>