<?php
if(class_exists('PermissionDescription')) return;
require_once("include/permissions.php");
require_once("include/language.php");
require_once("include/text.php");
/**
* Encapsulates information the ACL dialog requires to describe
* permission settings for an item with an empty ACL.
* i.e the caption, icon, and tooltip for the no-ACL option in the ACL dialog.
*/
class PermissionDescription {
private $global_perm;
private $channel_perm;
private $fallback_description;
/**
* Constructor is private.
* Use static methods fromGlobalPermission(), fromStandalonePermission(), or fromDescription()
* to create instances.
*/
private function __construct($global_perm, $channel_perm, $description = '') {
$this->global_perm = $global_perm;
$this->channel_perm = $channel_perm;
$this->fallback_description = ($description == '') ? t('Visible to your default audience') : $description;
}
/**
* If the interpretation of an empty ACL can't be summarised with a global default permission
* or a specific permission setting then use this method and describe what it means instead.
* Remember to localize the description first.
*
* @param string $description - the localized caption for the no-ACL option in the ACL dialog.
* @return a new instance of PermissionDescription
*/
public static function fromDescription($description) {
return new PermissionDescription('', 0x80000, $description);
}
/**
* Use this method only if the interpretation of an empty ACL doesn't fall back to a global
* default permission. You should pass one of the constants from boot.php - PERMS_PUBLIC,
* PERMS_NETWORK etc.
*
* @param integer $perm - a single enumerated constant permission - PERMS_PUBLIC, PERMS_NETWORK etc.
* @return a new instance of PermissionDescription
*/
public static function fromStandalonePermission($perm) {
$result = new PermissionDescription('', $perm);
$checkPerm = $this->get_permission_description();
if ($checkPerm == $this->fallback_description) {
$result = null;
logger('null PermissionDescription from unknown standalone permission: ' . $perm ,LOGGER_DEBUG, LOG_ERROR);
}
return $result;
}
/**
* This is the preferred way to create a PermissionDescription, as it provides the most details.
* Use this method if you know an empty ACL will result in one of the global default permissions
* being used, such as channel_r_stream (for which you would pass 'view_stream').
*
* @param string $permname - a key for the global perms array from get_perms() in permissions.php,
* e.g. 'view_stream', 'view_profile', etc.
* @return a new instance of PermissionDescription
*/
public static function fromGlobalPermission($permname) {
$result = null;
$global_perms = get_perms();
if (array_key_exists($permname, $global_perms)) {
$permDetails = $global_perms[$permname];
// It should be OK to always just read the permissions from App::$channel
//
// App::$profile is a union of channel and profile fields.
// The distinction is basically that App::$profile is pointing to the resource
// being observed. App::$channel is referring to the current logged-in channel
// member (if this is a local channel) e.g. the observer. We only show the ACL
// widget to the page owner (observer and observed are the same) so in that case
// I believe either may be safely used here.
$channelPerm = \App::$channel[$permDetails[0]];
$result = new PermissionDescription($permDetails[1], $channelPerm);
} else {
// The acl dialog can handle null arguments, but it shouldn't happen
logger('null PermissionDescription from unknown global permission: ' . $permname ,LOGGER_DEBUG, LOG_ERROR);
}
return $result;
}
/**
* Gets a localized description of the permission, or a generic message if the permission
* is unknown.
*
* @return string description
*/
public function get_permission_description() {
switch($this->channel_perm) {
case 0: return t('Only me');
case PERMS_PUBLIC: return t('Public');
case PERMS_NETWORK: return t('Anybody in the $Projectname network');
case PERMS_SITE: return sprintf(t('Any account on %s'), \App::get_hostname());
case PERMS_CONTACTS: return t('Any of my connections');
case PERMS_SPECIFIC:
// Because we're describing the permissions of an item with an empty ACL,
// the owner will be the only person able to see it if the permissions are
// set to "only specified connections".
return t('Only me (only specified contacts and me)');
case PERMS_AUTHED: return t('Anybody authenticated (could include visitors from other networks)');
case PERMS_PENDING: return t('Any connections including those who haven\'t yet been approved');
default: return $this->fallback_description;
}
}
/**
* Returns an icon css class name if an appropriate one is available, e.g. "fa-globe" for Public,
* otherwise returns empty string.
*
* @return string icon css class name (often FontAwesome)
*/
public function get_permission_icon() {
switch($this->channel_perm) {
case 0:/* only me */ return 'fa-eye-slash';
case PERMS_PUBLIC: return 'fa-globe';
case PERMS_NETWORK: return 'fa-share-alt-square'; // fa-share-alt-square is very similiar to the hubzilla logo, but we should create our own logo class to use
case PERMS_SITE: return 'fa-sitemap';
case PERMS_CONTACTS: return 'fa-group';
case PERMS_SPECIFIC:
// Because we're describing the permissions of an item with an empty ACL,
// the owner will be the only person able to see it if the permissions are
// set to "only specified connections".
return 'fa-eye-slash';
case PERMS_AUTHED: return '';
case PERMS_PENDING: return '';
default: return '';
}
}
/**
* Returns a localized description of where the permission came from, if this is known.
* If it's not know, or if the permission is standalone and didn't come from a default
* permission setting, then empty string is returned.
*
* @return string description or empty string
*/
public function get_permission_origin_description() {
switch($this->global_perm) {
case PERMS_R_STREAM: return t('This is your default setting for the audience of your normal stream, and posts.');
case PERMS_R_PROFILE: return t('This is your default setting for who can view your default channel profile');
case PERMS_R_ABOOK: return t('This is your default setting for who can view your connections');
case PERMS_R_STORAGE: return t('This is your default setting for who can view your file storage and photos');
case PERMS_R_PAGES: return t('This is your default setting for the audience of your webpages');
default: return '';
}
}
}
