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<?php
namespace Zotlabs\Access;
use Zotlabs\Lib\PConfig;
/**
* @brief Permission limits.
*
* Permission limits are a very high level permission setting. They are hard
* limits by design.
* "Who can view my photos (at all)?"
* "Who can post photos in my albums (at all)?"
*
* For viewing permissions we generally set these to 'anybody' and for write
* permissions we generally set them to 'those I allow', though many people
* restrict the viewing permissions further for things like 'Can view my connections'.
*
* People get confused enough by permissions that we wanted a place to set their
* privacy expectations once and be done with it.
*
* Connection related permissions like "Can Joe view my photos?" are handled by
* @ref ::Zotlabs::Lib::Permcat "Permcat" and inherit from the channel's Permission
* limits.
*
* @see Permissions
*/
class PermissionLimits {
/**
* @brief Get standard permission limits.
*
* Viewing permissions and post_comments permission are set to 'anybody',
* other permissions are set to 'those I allow'.
*
* The list of permissions comes from Permissions::Perms().
*
* @return array
*/
static public function Std_Limits() {
$limits = [];
$perms = Permissions::Perms();
foreach($perms as $k => $v) {
if(strstr($k, 'view') || $k === 'post_comments')
$limits[$k] = PERMS_PUBLIC;
else
$limits[$k] = PERMS_SPECIFIC;
}
return $limits;
}
/**
* @brief Sets a permission limit for a channel.
*
* @param int $channel_id
* @param string $perm
* @param int $perm_limit one of PERMS_* constants
*/
static public function Set($channel_id, $perm, $perm_limit) {
PConfig::Set($channel_id, 'perm_limits', $perm, $perm_limit);
}
/**
* @brief Get a channel's permission limits.
*
* Return a channel's permission limits from PConfig. If $perm is set just
* return this permission limit, if not set, return an array with all
* permission limits.
*
* @param int $channel_id
* @param string $perm (optional)
* @return
* * \b boolean false if no perm_limits set for this channel
* * \b int if $perm is set, return one of PERMS_* constants for this permission
* * \b array with all permission limits, if $perm is not set
*/
static public function Get($channel_id, $perm = '') {
if($perm) {
return PConfig::Get($channel_id, 'perm_limits', $perm);
}
PConfig::Load($channel_id);
if(array_key_exists($channel_id, \App::$config)
&& array_key_exists('perm_limits', \App::$config[$channel_id]))
return \App::$config[$channel_id]['perm_limits'];
return false;
}
}
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