Class implementing the controller of any restore process. More...

Inheritance diagram for restore_controller:

Public Member Functions
	__construct ($tempdir, $courseid, $interactive, $mode, $userid, $target, core\progress\base $progress=null, $releasesession=backup::RELEASESESSION_NO)
	Constructor. More...

	add_logger (base_logger $logger)
	Inserts a new logger at end of logging chain. More...

	calculate_checksum ()
	This function will return one unique and stable checksum for one instance of the class implementing it. More...

	convert ()
	Converts from current format to backup::MOODLE format.

	debug_display_all_settings_values ()
	For debug only. More...

	destroy ()
	Clean structures used by the restore_controller. More...

	execute_plan ()

	execute_precheck ($droptemptablesafter=false)
	Execute the restore prechecks to detect any problem before proceed with restore. More...

	finish_ui ()

	get_copy ()
	Get the course copy data. More...

	get_courseid ()

	get_execution ()

	get_executiontime ()

	get_format ()

	get_info ()

	get_interactive ()

	get_logger ()
	Gets first logger in logging chain. More...

	get_mode ()

	get_operation ()

	get_plan ()
	Returns the restore plan. More...

	get_precheck_results ()

	get_progress ()
	Gets the progress reporter, which can be used to report progress within the backup or restore process. More...

	get_releasesession ()
	Returns the set value of releasesession. More...

	get_restoreid ()

	get_results ()

	get_setting_value ($name, $default=false)
	Gets the value for the requested setting. More...

	get_status ()

	get_target ()

	get_tempdir ()

	get_type ()

	get_userid ()

	is_checksum_correct ($checksum)
	Given one checksum, returns if matches object's checksum (true) or no (false) More...

	is_samesite ()

	log ($message, $level, $a=null, $depth=null, $display=false)
	Logs data to the logger chain. More...

	precheck_executed ()
	Returns true if the prechecks have been executed. More...

	prepare_copy ()
	Do the necessary copy preparation actions. More...

	process_ui_event ()

	save_controller ($includeobj=true, $cleanobj=false)
	Save controller information. More...

	set_copy (\stdClass $data)
	Store extra data for course copy operations. More...

	set_execution ($execution, $executiontime=0)

	set_progress (\core\progress\base $progress)
	Sets the progress reporter. More...

	set_status ($status)

Static Public Member Functions
static	get_tempdir_name ($courseid=0, $userid=0)
	class method to provide pseudo random unique "correct" tempdir names

static	is_executing ()
	Checks whether restore is currently executing. More...

static	load_controller ($restoreid)

Public Attributes
const	CIPHER = 'aes-256-cbc'
	Cipher to be used in backup and restore operations.

const	CIPHERKEYLEN = 32
	Bytes enforced for key, using the cypher above. More...

const	ENROL_ALWAYS = 2

const	ENROL_NEVER = 0

const	ENROL_WITHUSERS = 1

const	EXECUTION_DELAYED = 2

const	EXECUTION_INMEDIATE = 1

const	FORMAT_IMSCC1 = 'imscc1'

const	FORMAT_IMSCC11 = 'imscc11'

const	FORMAT_MOODLE = 'moodle2'

const	FORMAT_MOODLE1 = 'moodle1'

const	FORMAT_UNKNOWN = 'unknown'

const	INTERACTIVE_NO = false

const	INTERACTIVE_YES = true

const	LOG_DEBUG = 50

const	LOG_ERROR = 20

const	LOG_INFO = 40

const	LOG_NONE = 10

const	LOG_WARNING = 30

const	MODE_ASYNC = 70
	This mode is for asynchronous backups. More...

const	MODE_AUTOMATED = 50

const	MODE_CONVERTED = 60

const	MODE_COPY = 80
	This mode is for course copies. More...

const	MODE_GENERAL = 10

const	MODE_HUB = 30

const	MODE_IMPORT = 20
	This is used for importing courses, and for duplicating activities. More...

const	MODE_SAMESITE = 40
	This mode is intended for duplicating courses and cases where the backup target is within the same site. More...

const	OPERATION_BACKUP ='backup'

const	OPERATION_RESTORE ='restore'

const	RELEASE = '3.9'
	Usually same than major release zero version, mainly for informative/historic purposes.

const	RELEASESESSION_NO = false
	Don't release the session during backup/restore.

const	RELEASESESSION_YES = true
	Release the session during backup/restore.

const	STATUS_AWAITING = 700

const	STATUS_CONFIGURED = 400

const	STATUS_CREATED = 100

const	STATUS_EXECUTING = 800

const	STATUS_FINISHED_ERR = 900

const	STATUS_FINISHED_OK =1000

const	STATUS_NEED_PRECHECK =600

const	STATUS_PLANNED = 300

const	STATUS_REQUIRE_CONV = 200

const	STATUS_SETTING_UI = 500

const	TARGET_CURRENT_ADDING = 1

const	TARGET_CURRENT_DELETING = 0

const	TARGET_EXISTING_ADDING = 4

const	TARGET_EXISTING_DELETING = 3

const	TARGET_NEW_COURSE = 2

const	TYPE_1ACTIVITY = 'activity'

const	TYPE_1COURSE = 'course'

const	TYPE_1SECTION = 'section'

const	VAR_ACTIVITYID = -21

const	VAR_BACKUPID = -1001

const	VAR_BASEPATH = -1011

const	VAR_BLOCKID = -51

const	VAR_BLOCKNAME = -61

const	VAR_CONTEXTID = -71

const	VAR_COURSEID = -1

const	VAR_MODID = -31

const	VAR_MODNAME = -41

const	VAR_PARENTID = -81

const	VAR_SECTIONID = -11

const	VERSION = 2020061500
	Usually same than major release version, this is used to mark important point is backup when some behavior/approach channged, in order to allow conditional coding based on it.

Protected Member Functions
	apply_defaults ()
	Apply defaults from the global admin settings.

	calculate_restoreid ()

	load_plan ()

Protected Attributes
	$checksum

stdClass	$copy
	Holds the relevant destination information for course copy operations.

	$courseid

integer	$execution
	Immediate/delayed execution type.

	$executiontime

	$format

	$info

	$interactive

base_logger	$logger
	Logging chain object (moodle, inline, fs, db, syslog)

	$mode

	$operation

restore_plan	$plan

	$precheck

core progress base	$progress
	Progress reporting object.

bool	$releasesession = backup::RELEASESESSION_NO
	Whether this backup should release the session.

	$restoreid

	$samesite

	$status

	$target

	$tempdir

	$type

	$userid

Static Protected Attributes
static int	$executing = 0
	Number of restore_controllers that are currently executing.

Detailed Description

Class implementing the controller of any restore process.

This final class is in charge of controlling all the restore architecture, for any type of backup.

TODO: Finish phpdocs

Constructor & Destructor Documentation

◆ __construct()

restore_controller::__construct	(		$tempdir,
			$courseid,
			$interactive,
			$mode,
			$userid,
			$target,
		core\progress\base	$progress = `null`,
			$releasesession = `backup::RELEASESESSION_NO`
	)

Constructor.

If you specify a progress monitor, this will be used to report progress while loading the plan, as well as for future use. (You can change it for a different one later using set_progress.)

Parameters

string	$tempdir	Directory under $CFG->backuptempdir awaiting restore
int	$courseid	Course id where restore is going to happen
bool	$interactive	backup::INTERACTIVE_YES[true] or backup::INTERACTIVE_NO[false]
int	$mode	backup::MODE_[ GENERAL \| HUB \| IMPORT \| SAMESITE ]
int	$userid
int	$target	backup::TARGET_[ NEW_COURSE \| CURRENT_ADDING \| CURRENT_DELETING \| EXISTING_ADDING \| EXISTING_DELETING ]
core::progress::base	$progress	Optional progress monitor
bool	$releasesession	Should release the session? backup::RELEASESESSION_YES or backup::RELEASESESSION_NO

Member Function Documentation

◆ add_logger()

base_controller::add_logger ( base_logger $logger )

inherited

Inserts a new logger at end of logging chain.

Parameters

base_logger $logger New logger to add

◆ calculate_checksum()

restore_controller::calculate_checksum ( )

This function will return one unique and stable checksum for one instance of the class implementing it.

It's each implementation responsibility to do it recursively if needed and use optional store (caching) of the checksum if necessary/possible

Implements checksumable.

◆ debug_display_all_settings_values()

restore_controller::debug_display_all_settings_values ( )

For debug only.

Get a simple test display of all the settings.

Return values

string

◆ destroy()

restore_controller::destroy ( )

Clean structures used by the restore_controller.

This method clean various structures used by the restore_controller, destroying them in an ordered way, so their memory will be gc properly by PHP (mainly circular references).

Note that, while it's not mandatory to execute this method, it's highly recommended to do so, specially in scripts performing multiple operations (like the automated backups) or the system will run out of memory after a few dozens of backups)

◆ execute_precheck()

restore_controller::execute_precheck ( $droptemptablesafter = false )

Execute the restore prechecks to detect any problem before proceed with restore.

This function checks various parts of the restore (versions, users, roles...) returning true if everything was ok or false if any warning/error was detected. Any warning/error is returned by the get_precheck_results() method. Note: if any problem is found it will, automatically, drop all the restore temp tables as far as the next step is to inform about the warning/errors. If no problem is found, then default behaviour is to keep the temp tables so, in the same request restore will be executed, saving a lot of checks to be executed again. Note: If for any reason (UI to show after prechecks...) you want to force temp tables to be dropped always, you can pass true to the $droptemptablesafter parameter

◆ get_copy()

base_controller::get_copy ( )

inherited

Get the course copy data.

Return values

stdClass

◆ get_logger()

base_controller::get_logger ( )

inherited

Gets first logger in logging chain.

Return values

base_logger Logger

◆ get_plan()

restore_controller::get_plan ( )

Returns the restore plan.

Return values

restore_plan

◆ get_progress()

base_controller::get_progress ( )

inherited

Gets the progress reporter, which can be used to report progress within the backup or restore process.

Return values

core::progress::base Progress reporting object

◆ get_releasesession()

base_controller::get_releasesession ( )

inherited

Returns the set value of releasesession.

This is used to indicate if the session should be closed during the backup/restore.

Return values

bool	Indicates whether the session should be released.

◆ get_setting_value()

restore_controller::get_setting_value	(	$name,
		$default = `false`
	)

Gets the value for the requested setting.

Parameters

string	$name
bool	$default

Return values

mixed

◆ is_checksum_correct()

restore_controller::is_checksum_correct ( $checksum )

Given one checksum, returns if matches object's checksum (true) or no (false)

Implements checksumable.

◆ is_executing()

static restore_controller::is_executing ( )

static

Checks whether restore is currently executing.

Certain parts of code that is called during restore, but not directly part of the restore system, may need to behave differently during restore (e.g. do not bother resetting a cache because we know it will be reset at end of operation).

Return values

bool	True if any restore is currently executing

◆ log()

base_controller::log	(	$message,
		$level,
		$a = `null`,
		$depth = `null`,
		$display = `false`
	)

inherited

Logs data to the logger chain.

See also: loggable::log()

Implements loggable.

◆ precheck_executed()

restore_controller::precheck_executed ( )

Returns true if the prechecks have been executed.

Return values

bool

◆ prepare_copy()

restore_controller::prepare_copy ( )

Do the necessary copy preparation actions.

This method should only be called once the backup of a copy operation is completed.

Exceptions

restore_controller_exception

◆ save_controller()

restore_controller::save_controller	(	$includeobj = `true`,
		$cleanobj = `false`
	)

Save controller information.

Parameters

bool	$includeobj	to decide if the object itself must be updated (true) or no (false)
bool	$cleanobj	to decide if the object itself must be cleaned (true) or no (false)

◆ set_copy()

base_controller::set_copy ( \stdClass $data )

inherited

Store extra data for course copy operations.

For a course copying these is data required to be passed to the restore step. We store this data in its own section of the backup controller

Parameters

stdClass $data The course copy data.

Exceptions

backup_controller_exception

◆ set_progress()

base_controller::set_progress ( \core\progress\base $progress )

inherited

Sets the progress reporter.

Parameters

core::progress::base $progress Progress reporting object

Member Data Documentation

◆ CIPHERKEYLEN

const backup::CIPHERKEYLEN = 32

inherited

Bytes enforced for key, using the cypher above.

Restrictive? Yes, but better than unsafe lengths

◆ MODE_ASYNC

const backup::MODE_ASYNC = 70

inherited

This mode is for asynchronous backups.

These backups will run via adhoc scheduled tasks.

◆ MODE_COPY

const backup::MODE_COPY = 80

inherited

This mode is for course copies.

It is similar to async, but identifies back up and restore tasks as course copies.

These copies will run via adhoc scheduled tasks.

◆ MODE_IMPORT

const backup::MODE_IMPORT = 20

inherited

This is used for importing courses, and for duplicating activities.

This mode will ensure that files are not included in the backup generation, and during a restore they are copied from the existing file record.

◆ MODE_SAMESITE

const backup::MODE_SAMESITE = 40

inherited

This mode is intended for duplicating courses and cases where the backup target is within the same site.

This mode will ensure that files are not included in the backup generation, and during a restore they are copied from the existing file record.

For creating a backup for archival purposes or greater longevity, use MODE_GENERAL.

The documentation for this class was generated from the following file:

backup/controller/restore_controller.class.php

Public Member Functions

Static Public Member Functions

Public Attributes

Protected Member Functions

Protected Attributes

Static Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ __construct()

Member Function Documentation

◆ add_logger()

◆ calculate_checksum()

◆ debug_display_all_settings_values()

◆ destroy()

◆ execute_precheck()

◆ get_copy()

◆ get_logger()

◆ get_plan()

◆ get_progress()

◆ get_releasesession()

◆ get_setting_value()

◆ is_checksum_correct()

◆ is_executing()

◆ log()

◆ precheck_executed()

◆ prepare_copy()

◆ save_controller()

◆ set_copy()

◆ set_progress()

Member Data Documentation

◆ CIPHERKEYLEN

◆ MODE_ASYNC

◆ MODE_COPY

◆ MODE_IMPORT

◆ MODE_SAMESITE