extern/egroupware_official
1
0
Fork 0
mirror of https://github.com/EGroupware/egroupware.git synced 2024-12-04 22:01:05 +01:00
Code Issues Packages Projects Releases Wiki Activity
9ca2f15c2b
egroupware_official/phpgwapi/inc/class.preferences.inc.php

919 lines
26 KiB
PHP
Raw Blame History

<?php
/**
* EGroupware API - Preferences
*
* @link http://www.egroupware.org
* @author Joseph Engo <jengo@phpgroupware.org>
* @author Mark Peters <skeeter@phpgroupware.org>
* @author Ralf Becker <RalfBecker-AT-outdoor-training.de> merging prefs on runtime, session prefs and reworked the class
* Copyright (C) 2000, 2001 Joseph Engo
* @license http://opensource.org/licenses/lgpl-license.php LGPL - GNU Lesser General Public License
* @package api
* @version $Id$
*/
/**
* preferences class used for setting application preferences
*
* preferences are read into following arrays:
* - $data effective prefs used everywhere in EGroupware
* Effective prefs are merged together in following precedence from:
* - $forced forced preferences set by the admin, they take precedence over user or default prefs
* - $session temporary prefs eg. language set on login just for session
* - $user the stored user prefs, only used for manipulating and storeing the user prefs
* - $group the stored prefs of all group-memberships of current user, can NOT be deleted or stored directly!
* - $default the default preferences, always used when the user has no own preference set
*
* To update the prefs of a certain group, not just the primary group of the user, you have to
* create a new instance of preferences class, with the given id of the group. This takes into
* account the offset of DEFAULT_ID, we are using currently for groups (as -1, and -2) are already
* taken!
*
* Preferences get now json-encoded and no longer PHP serialized and addslashed,
* thought they only change when they get updated.
*/
class preferences
{
/**
* account_id for default prefs
*/
const DEFAULT_ID = -2;
/**
* account_id for forced prefs
*/
const FORCED_ID = -1;
/**
* account the class is instanciated for
* @var int
*/
var $account_id;
/**
* account-type u or g
* @var string
*/
var $account_type;
/**
* effectiv user prefs, used by all apps
* @var array
*/
var $data = array();
/**
* set user prefs for saveing (no defaults/forced prefs merged)
* @var array
*/
var $user = array();
/**
* primary group prefs
* @var array
*/
var $group = array();
/**
* default prefs
* @var array
*/
var $default = array();
/**
* forced prefs
* @var array
*/
var $forced = array();
/**
* session / tempory prefs
* @var array
*/
var $session = array();
/**
* @var egw_db
*/
var $db;
/**
* table-name
*/
const TABLE = 'egw_preferences';
var $table = self::TABLE;
var $values,$vars; // standard notify substitues, will be set by standard_substitues()
/**
* Contstructor
*
* @param int|string $account_id=''
* @return preferences
*/
function __construct($account_id = '')
{
if (isset($GLOBALS['egw']->db))
{
$this->db = $GLOBALS['egw']->db;
}
else
{
$this->db = $GLOBALS['egw_setup']->db;
$this->table = $GLOBALS['egw_setup']->prefs_table;
}
$this->set_account_id($account_id);
}
/**
* Set account_id for class
*
* Takes care of offset for groups.
*
* @param int|string $account_id numeric account_id, "default", "forced" to load default or forced preferences
* or account_lid (only if !== "default" or "forced"!)
*/
function set_account_id($account_id)
{
if ($account_id === 'default')
{
$this->account_id = self::DEFAULT_ID;
}
elseif ($account_id === 'forced')
{
$this->account_id = self::FORCED_ID;
}
// if we got instancated for a group, need to set offset of DEFAULT_ID!
elseif ($account_id < 0 || !is_numeric($account_id) && ($account_id = get_account_id($account_id)) < 0)
{
$this->account_id = $account_id + self::DEFAULT_ID;
}
else
{
$this->account_id = $account_id;
}
//error_log(__METHOD__."($account_id) setting this->account_id to $this->account_id");
}
/**
* Return account_id class is instanciated for or "default" or "forced"
*
* Takes care of offset for groups.
*
* @return string|int
*/
function get_account_id()
{
switch ($this->account_id)
{
case self::DEFAULT_ID:
return 'default';
case self::FORCED_ID:
return 'forced';
}
return $this->account_id < self::DEFAULT_ID ? $this->account_id-self::DEFAULT_ID : $this->account_id;
}
/**
* Old PHP4 contstructor
*
* @param int|string $account_id=''
* @return preferences
* @deprecated
*/
function preferences($account_id = '')
{
self::__construct($account_id);
}
/**
* Magic function to avoid storing perferences in session, as they get re-read on each request by egw_session::verify()
*
* @return array with class vars to store
*/
function __sleep()
{
$vars = array_keys(get_object_vars($this));
return array_diff($vars, array('data', 'user', 'group', 'default', 'forced', 'session'));
}
/**
* Lifetime in seconds of cached items 1d
*/
const CACHE_LIFETIME = 86400;
/**
* Read preferences of requested id(s)
*
* @param int|array $ids
* @return array id => app => preference data
*/
function cache_read($ids)
{
$prefs = egw_cache::getInstance(__CLASS__, $ids);
$db_read = array();
foreach((array)$ids as $id)
{
// if prefs are not returned, null or not an array, read them from db
if (!isset($prefs[$id]) && !is_array($prefs[$id])) $db_read[] = $id;
}
if ($db_read)
{
foreach($this->db->select($this->table,'*',array('preference_owner' => $db_read),__LINE__,__FILE__) as $row)
{
// The following replacement is required for PostgreSQL to work
$app = trim($row['preference_app']);
$prefs[$row['preference_owner']][$app] = self::unserialize($row['preference_value']);
}
foreach($db_read as $id)
{
if (!isset($prefs[$id])) $prefs[$id] = array();
egw_cache::setInstance(__CLASS__, $id, $prefs[$id]);
}
}
//error_log(__METHOD__.'('.array2string($ids).') read-from-db='.array2string($db_read));
return $prefs;
}
/**
* parses a notify and replaces the substitutes
*
* @param string $msg message to parse / substitute
* @param array $values=array() extra vars to replace in addition to $this->values, vars are in an array with \
* $key => $value pairs, $key does not include the $'s and is the *untranslated* name
* @param boolean $use_standard_values=true should the standard values are used
* @return string with parsed notify-msg
*/
function parse_notify($msg,$values=array(),$use_standard_values=True)
{
$vals = $values ? $values : array();
if ($use_standard_values && is_array($this->values))
{
$vals += $this->values;
}
$replace = $with = array();
foreach($vals as $key => $val)
{
if ($this->debug) error_log(__METHOD__." replacing \$\$$key\$\$ with $val ");
$replace[] = '$$'.$key.'$$';
$with[] = $val;
}
return str_replace($replace,$with,$msg);
}
/**
* replaces the english key's with translated ones, or if $un_lang the opposite
*
* @param string $msg message to translate
* @param array $values=array() extra vars to replace in addition to $this->values, vars are in an array with \
* $key => $value pairs, $key does not include the $'s and is the *untranslated* name
* @param boolean $un_lang=false if true translate back
* @return string
*/
function lang_notify($msg,$vals=array(),$un_lang=False)
{
foreach(array_keys($vals) as $key)
{
$lname = ($lname = lang($key)) == $key.'*' ? $key : $lname;
if ($un_lang)
{
$langs[$lname] = '$$'.$key.'$$';
}
else
{
$langs[$key] = '$$'.$lname.'$$';
}
}
return $this->parse_notify($msg,$langs,False);
}
/**
* define some standard substitues-values and use them on the prefs, if needed
*/
function standard_substitutes()
{
if ($this->debug) error_log(__METHOD__." is called ");
if (!is_array(@$GLOBALS['egw_info']['user']['preferences']))
{
$GLOBALS['egw_info']['user']['preferences'] = $this->data; // else no lang()
}
// we cant use phpgw_info/user/fullname, as it's not set when we run
$lid = $fname = $lname = null;
$GLOBALS['egw']->accounts->get_account_name($this->account_id,$lid,$fname,$lname);
$this->values = array( // standard notify replacements
'fullname' => common::display_fullname('',$fname,$lname),
'firstname' => $fname,
'lastname' => $lname,
'domain' => $GLOBALS['egw_info']['server']['mail_suffix'],
'email' => $this->email_address($this->account_id),
'date' => common::show_date('',$GLOBALS['egw_info']['user']['preferences']['common']['dateformat']),
);
// do this first, as it might be already contain some substitues
//
$this->values['email'] = $this->parse_notify($this->values['email']);
$this->vars = array( // langs have to be in common !!!
'fullname' => lang('name of the user, eg. "%1"',$this->values['fullname']),
'firstname' => lang('first name of the user, eg. "%1"',$this->values['firstname']),
'lastname' => lang('last name of the user, eg. "%1"',$this->values['lastname']),
'domain' => lang('domain name for mail-address, eg. "%1"',$this->values['domain']),
'email' => lang('email-address of the user, eg. "%1"',$this->values['email']),
'date' => lang('todays date, eg. "%1"',$this->values['date']),
);
if ($this->debug) error_log(__METHOD__.print_r($this->vars,true));
// do the substituetion in the effective prefs (data)
//
foreach($this->data as $app => $data)
{
if(!is_array($data)) continue;
foreach($data as $key => $val)
{
if (!is_array($val) && strpos($val,'$$') !== False)
{
$this->data[$app][$key] = $this->parse_notify($val);
}
elseif (is_array($val))
{
foreach($val as $k => $v)
{
if (!is_array($v) && strpos($v,'$$') !== False)
{
$this->data[$app][$key][$k] = $this->parse_notify($v);
}
}
}
}
}
}
/**
* Unserialize data from either json_encode or PHP serialize and addslashes
*
* @param string $str serialized prefs
* @return array
*/
protected static function unserialize($str)
{
// handling of new json-encoded prefs
if ($str[0] != 'a' && $str[1] != ':')
{
return json_decode($str, true);
}
// handling of old PHP serialized and addslashed prefs
$data = php_safe_unserialize($str);
if($data === false)
{
// manually retrieve the string lengths of the serialized array if unserialize failed
$data = php_safe_unserialize(preg_replace_callback('!s:(\d+):"(.*?)";!s', function($matches)
{
return 's:'.mb_strlen($matches[2],'8bit').':"'.$matches[2].'";';
}, $str));
}
self::unquote($data);
return $data;
}
/**
* unquote (stripslashes) recursivly the whole array
*
* @param array &$arr array to unquote (var-param!)
*/
protected static function unquote(&$arr)
{
if (!is_array($arr))
{
$arr = stripslashes($arr);
return;
}
foreach($arr as $key => $value)
{
if (is_array($value))
{
self::unquote($arr[$key]);
}
else
{
$arr[$key] = stripslashes($value);
}
}
}
/**
* read preferences from the repository
*
* the function ready all 3 prefs user/default/forced and merges them to the effective ones
*
* @param boolean $use_session=true should the session prefs get used (default true) or not (false)
* @return array with effective prefs ($this->data)
*/
function read_repository($use_session=true)
{
$this->session = $use_session ? egw_cache::getSession('preferences','preferences') : array();
if (!is_array($this->session))
{
$this->session = array();
}
$this->forced = $this->default = $this->user = $this->group = array();
$to_read = array(self::DEFAULT_ID,self::FORCED_ID,$this->account_id);
if ($this->account_id > 0)
{
$primary_group = accounts::id2name($this->account_id, 'account_primary_group');
foreach((array)$GLOBALS['egw']->accounts->memberships($this->account_id, true) as $gid)
{
if ($gid != $primary_group) $to_read[] = $gid + self::DEFAULT_ID; // need to offset it with DEFAULT_ID = -2!
}
$to_read[] = $primary_group + self::DEFAULT_ID;
}
foreach($this->cache_read($to_read) as $id => $values)
{
switch($id)
{
case self::FORCED_ID:
$this->forced = $values;
break;
case self::DEFAULT_ID:
$this->default = $values;
break;
case $this->account_id: // user
$this->user = $values;
break;
default:
foreach($values as $app => $vals)
{
$this->group[$app] = $vals + (array)$this->group[$app];
}
break;
}
}
$this->data = $this->user;
// let the (temp.) session prefs. override the user prefs.
//
foreach($this->session as $app => $values)
{
foreach($values as $var => $value)
{
$this->data[$app][$var] = $value;
}
}
// now use (primary) group defaults if needed (user-value unset or empty)
//
foreach((array)$this->group as $app => $values)
{
foreach((array)$values as $var => $value)
{
if (!isset($this->data[$app][$var]) || $this->data[$app][$var] === '')
{
$this->data[$app][$var] = $value;
}
}
}
// now use defaults if needed (user-value unset or empty)
//
foreach((array)$this->default as $app => $values)
{
foreach((array)$values as $var => $value)
{
if (!isset($this->data[$app][$var]) || $this->data[$app][$var] === '')
{
//if ($var=='remote_application_url') error_log(__METHOD__.__LINE__.' default for '.$var.' with '.$value);
$this->data[$app][$var] = $value;
}
}
}
// now set/force forced values
//
foreach((array)$this->forced as $app => $values)
{
foreach((array)$values as $var => $value)
{
$this->data[$app][$var] = $value;
}
}
// setup the standard substitutes and substitutes the data in $this->data
//
if ($GLOBALS['egw_info']['flags']['load_translations'] !== false)
{
$this->standard_substitutes();
}
// This is to supress warnings during login
if (is_array($this->data))
{
reset($this->data);
}
if (isset($this->debug) && substr($GLOBALS['egw_info']['flags']['currentapp'],0,3) != 'log')
{
echo 'user<pre>'; print_r($this->user); echo "</pre>\n";
echo 'forced<pre>'; print_r($this->forced); echo "</pre>\n";
echo 'default<pre>'; print_r($this->default); echo "</pre>\n";
echo 'group<pre>'; print_r($this->group); echo "</pre>\n";
echo 'effectiv<pre>'; print_r($this->data); echo "</pre>\n";
}
$this->check_set_tz_offset();
return $this->data;
}
/**
* Get default preferences (also taking forced preferences into account!)
*
* @param string $app=null
* @param string $name=null
* @return mixed
*/
function default_prefs($app=null,$name=null)
{
// boetemplate::complete_array_merge() is identical to PHP >= 5.3 array_replace_recursive()
$default = boetemplate::complete_array_merge($this->default, $this->forced);
if ($app) $default = $default[$app];
if ($name && is_array($default)) $default = $default[$name];
return $default;
}
/**
* Checking new timezone ('tz') pref and setting old tz_offset pref from it
*
*/
function check_set_tz_offset()
{
$prefs =& $GLOBALS['egw_info']['user']['preferences']['common'];
if (!empty($prefs['tz']))
{
egw_time::setUserPrefs($prefs['tz'],$prefs['dateformat'],$prefs['timeformat']);
// set the old preference for compatibilty with old code
$prefs['tz_offset'] = egw_time::tz_offset_s()/3600;
//echo "<p>".__METHOD__."() tz=$prefs[tz] --> tz_offset=$prefs[tz_offset]</p>\n";
// ToDo: get rid of that
if (isset($GLOBALS['egw']) && ($GLOBALS['egw'] instanceof egw))
{
$GLOBALS['egw']->unset_datetime(); // to force an update
}
}
}
/**
* Set user timezone, if we get restored from session
*
*/
function __wakeup()
{
$this->check_set_tz_offset();
}
/**
* read preferences from repository and stores in an array
*
* @return array containing the effective user preferences
*/
function read()
{
if (count($this->data) == 0)
{
$this->read_repository();
}
reset ($this->data);
return $this->data;
}
/**
* add preference to $app_name a particular app
*
* the effective prefs ($this->data) are updated to reflect the change
*
* @param string $app_name name of the app
* @param string $var name of preference to be stored
* @param mixed $value='##undef##' value of the preference, if not given $GLOBALS[$var] is used
* @param $type='user' of preference to set: forced, default, user
* @return array with new effective prefs (even when forced or default prefs are set !)
*/
function add($app_name,$var,$value = '##undef##',$type='user')
{
//echo "<p>add('$app_name','$var','$value')</p>\n";
if ($value === '##undef##')
{
$value = $GLOBALS[$var];
}
switch ($type)
{
case 'session':
if (!isset($this->forced[$app_name][$var]) || $this->forced[$app_name][$var] === '')
{
$this->session[$app_name][$var] = $this->data[$app_name][$var] = $value;
$GLOBALS['egw']->session->appsession('preferences','preferences',$this->session);
if (method_exists($GLOBALS['egw'],'invalidate_session_cache')) // egw object in setup is limited
{
$GLOBALS['egw']->invalidate_session_cache(); // in case with cache the egw_info array in the session
}
}
break;
case 'forced':
$this->data[$app_name][$var] = $this->forced[$app_name][$var] = $value;
break;
case 'default':
$this->default[$app_name][$var] = $value;
if ((!isset($this->forced[$app_name][$var]) || $this->forced[$app_name][$var] === '') &&
(!isset($this->user[$app_name][$var]) || $this->user[$app_name][$var] === ''))
{
$this->data[$app_name][$var] = $value;
}
break;
case 'user':
default:
$this->user[$app_name][$var] = $value;
if (!isset($this->forced[$app_name][$var]) || $this->forced[$app_name][$var] === '')
{
$this->data[$app_name][$var] = $value;
}
break;
}
reset($this->data);
return $this->data;
}
/**
* delete preference from $app_name
*
* the effektive prefs ($this->data) are updated to reflect the change
*
* @param string $app_name name of app
* @param string $var=false variable to be deleted
* @param string $type='user' of preference to set: forced, default, user
* @return array with new effective prefs (even when forced or default prefs are deleted!)
*/
function delete($app_name, $var = False,$type = 'user')
{
//echo "<p>delete('$app_name','$var','$type')</p>\n";
$set_via = array(
'forced' => array('user','default'),
'default' => array('forced','user'),
'user' => array('forced','group','default'),
'group' => array('forced'),
);
if (!isset($set_via[$type]))
{
$type = 'user';
}
$pref = &$this->$type;
if (($all = empty($var))) // to check if $var is regarded as empty (false, 0, '', null, array() should do the trick
{
unset($pref[$app_name]);
unset($this->data[$app_name]);
}
else
{
unset($pref[$app_name][$var]);
unset($this->data[$app_name][$var]);
}
// set the effectiv pref again if needed
//
foreach ($set_via[$type] as $set_from)
{
$arr = &$this->$set_from;
if ($all)
{
if (isset($arr[$app_name]))
{
$this->data[$app_name] = $arr[$app_name];
break;
}
}
else
{
if($var && @isset($arr[$app_name][$var]) && $arr[$app_name][$var] !== '')
{
$this->data[$app_name][$var] = $arr[$app_name][$var];
break;
}
}
unset($arr);
}
reset ($this->data);
return $this->data;
}
/**
* delete all prefs of a given user
*
* @param int $accountid
*/
function delete_user($accountid)
{
if ($accountid > 0)
{
$this->db->delete($this->table,array('preference_owner' => $accountid),__LINE__,__FILE__);
egw_cache::unsetInstance(__CLASS__, $accountid);
}
}
/**
* delete all prefs of a given group
*
* @param int $accountid
*/
function delete_group($accountid)
{
if ($accountid < 0)
{
$this->db->delete($this->table,array('preference_owner' => $accountid+self::DEFAULT_ID),__LINE__,__FILE__);
egw_cache::unsetInstance(__CLASS__, $accountid+self::DEFAULT_ID);
}
}
/**
* Change single value in preferences of all users (incl. groups, default and forced)
*
* @param string $app
* @param string $name
* @param string $value new value to set, or null or '' to delete it
* @param string $old_value if given, only change if that's current value
* @param string $type if given limit to "user", "forced", "default", "group"
*/
public static function change_preference($app, $name, $value, $old_value=null, $type=null)
{
$db = isset($GLOBALS['egw_setup']->db) ? $GLOBALS['egw_setup']->db : $GLOBALS['egw']->db;
$where = array(
'preference_app' => $app,
);
switch($type)
{
case 'forced':
$where['preference_owner'] = self::FORCED_ID;
break;
case 'default':
$where['preference_owner'] = self::DEFAULT_ID;
break;
case 'user':
$where[] = 'preference_owner > 0';
break;
case 'group':
$where[] = 'preference_owner < '.self::DEFAULT_ID;
break;
}
foreach($db->select(self::TABLE, '*', $where, __LINE__, __FILE__) as $row)
{
$prefs = self::unserialize($row['preference_value']);
if (isset($old_value) && $prefs[$name] != $old_value) continue;
if ((string)$value !== '')
{
$prefs[$name] = $value;
}
else
{
unset($prefs[$name]);
}
$db->update(self::TABLE, array(
'preference_value' => json_encode($prefs),
), array(
'preference_owner' => $row['preference_owner'],
'preference_app' => $row['preference_app'],
), __LINE__, __FILE__);
// update instance-wide cache
$cached = egw_cache::getInstance(__CLASS__, $row['preference_owner']);
if($cached && $cached[$row['preference_app']])
{
$cached[$row['preference_app']] = $prefs;
egw_cache::setInstance(__CLASS__, $row['preference_owner'], $cached);
}
}
}
/**
* Completely delete the specified preference name from all users
*
* @param string $app Application name
* @param string $name Preference name
* @param string $type='user' of preference to set: forced, default, user
*/
public static function delete_preference($app, $name, $type='user')
{
self::change_preference($app, $name, null, null, $type);
}
/**
* Save the the preferences to the repository
*
* User prefs for saveing are in $this->user not in $this->data, which are the effectiv prefs only!
*
* @param boolean $update_session_info=false old param, seems not to be used (not used anymore)
* @param string $type='user' which prefs to update: user/default/forced
* @param boolean $invalid_cache=true should we invalidate the cache, default true (not used anymore)
* @return array with new effective prefs (even when forced or default prefs are deleted!)
*/
function save_repository($update_session_info = False,$type='user',$invalid_cache=true)
{
unset($update_session_info, $invalid_cache); // no longer used
switch($type)
{
case 'forced':
$account_id = self::FORCED_ID;
$prefs = &$this->forced;
break;
case 'default':
$account_id = self::DEFAULT_ID;
$prefs = &$this->default;
break;
case 'group':
throw new egw_exception_wrong_parameter("Can NOT save group preferences, as they are from multiple groups!");
default:
$account_id = (int)$this->account_id;
$prefs = &$this->user; // we use the user-array as data contains default values too
break;
}
//echo "<p>preferences::save_repository(,$type): account_id=$account_id, prefs="; print_r($prefs); echo "</p>\n";
if (isset($GLOBALS['egw_setup']) || !$GLOBALS['egw']->acl->check('session_only_preferences',1,'preferences') &&
(!($old_prefs = $this->cache_read($account_id)) || $old_prefs[$account_id] != $prefs))
{
//error_log(__METHOD__."(type=$type) saved, because old_prefs[$account_id] != prefs=".array2string($prefs));
$changed = 0;
foreach($prefs as $app => $value)
{
// check if app preferences have changed, if not no need to save them
if ($old_prefs && $old_prefs[$app] == $value) continue;
if (!$changed++) $this->db->transaction_begin();
if (!is_array($value) || !$value)
{
$this->db->delete($this->table, array(
'preference_owner' => $account_id,
'preference_app' => $app,
), __LINE__, __FILE__);
unset($prefs[$app]);
}
else
{
$this->db->insert($this->table,array(
'preference_value' => json_encode($value),
),array(
'preference_owner' => $account_id,
'preference_app' => $app,
),__LINE__,__FILE__);
}
}
if ($changed)
{
$this->db->transaction_commit();
// update instance-wide cache
egw_cache::setInstance(__CLASS__, $account_id, $prefs);
}
}
//else error_log(__METHOD__."(type=$type) NOT saved because old_prefs[$account_id] == prefs=".array2string($prefs));
return $this->data;
}
/**
* @deprecated use add
*/
function change($app_name,$var,$value = "")
{
return $this->add($app_name,$var,$value);
}
/**
* returns the custom email-address (if set) or generates a default one
*
* This will generate the appropriate email address used as the "From:"
* email address when the user sends email, the localpert * part. The "personal"
* part is generated elsewhere.
* In the absence of a custom ['email']['address'], this function should be used to set it.
*
* @access public
* @param int $accountid - as determined in and/or passed to "create_email_preferences"
* @return string with email-address
*/
function email_address($account_id='')
{
if (isset($this->data['email']['address']))
{
return $this->data['email']['address'];
}
// if email-address is set in the account, return it
if (($email = $GLOBALS['egw']->accounts->id2name($account_id,'account_email')))
{
return $email;
}
$prefs_email_address = $GLOBALS['egw']->accounts->id2name($account_id);
if (strpos($prefs_email_address,'@') === False)
{
$prefs_email_address .= '@' . $GLOBALS['egw_info']['server']['mail_suffix'];
}
return $prefs_email_address;
}
}
Reference in New Issue View Git Blame Copy Permalink