Search moodle.org's
Developer Documentation

See Release Notes

  • Bug fixes for general core bugs in 3.11.x will end 14 Nov 2022 (12 months plus 6 months extension).
  • Bug fixes for security issues in 3.11.x will end 13 Nov 2023 (18 months plus 12 months extension).
  • PHP version: minimum PHP 7.3.0 Note: minimum PHP version has increased since Moodle 3.10. PHP 7.4.x is supported too.
/backup/converter/ -> convertlib.php (source)

[Source view]

Provides base converter classes

Copyright: 2011 Mark Nielsen <mark@moodlerooms.com>
License: http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
File Size: 289 lines (9 kb)
Included or required:0 times
Referenced: 2 times
Includes or requires: 0 files

Defines 2 classes

base_converter:: (15 methods):
  __construct()
  set_logger()
  log()
  get_id()
  get_name()
  convert()
  get_workdir_path()
  get_tempdir_path()
  is_available()
  detect_format()
  description()
  init()
  create_workdir()
  replace_tempdir()
  destroy()

convert_exception:: (1 method):
  __construct()


Class: base_converter  - X-Ref

Base converter class

All Moodle backup converters are supposed to extend this base class.

__construct($tempdir, $logger = null)   X-Ref
Constructor

param: string $tempdir the relative path to the directory containing the unpacked backup to convert
param: null|base_logger logger to use during the conversion

set_logger($logger)   X-Ref
Sets the logger to use during the conversion

param: null|base_logger $logger

log($message, $level, $a = null, $depth = null, $display = false)   X-Ref
If the logger was set for the converter, log the message

If the $display is enabled, the spaces in the $message text are removed
and the text is used as a string identifier in the core_backup language file.

param: string $message message text
param: int $level message level {@example backup::LOG_WARNING}
param: null|mixed $a additional information
param: null|int $depth the message depth
param: bool $display whether the message should be sent to the output, too

get_id()   X-Ref
Get instance identifier

return: string the unique identifier of this converter instance

get_name()   X-Ref
Get converter name

return: string the system name of the converter

convert()   X-Ref
Converts the backup directory


get_workdir_path()   X-Ref

return: string the full path to the working directory

get_tempdir_path()   X-Ref

return: string the full path to the directory with the source backup

is_available()   X-Ref
Makes sure that this converter is available at this site

This is intended for eventual PHP extensions check, environment check etc.
All checks that do not depend on actual backup data should be done here.

return: boolean true if this converter should be considered as available

detect_format($tempdir)   X-Ref
Detects the format of the backup directory

Moodle 2.x format is being detected by the core itself. The converters are
therefore supposed to detect the source format. Eventually, if the target
format os not {@link backup::FORMAT_MOODLE} then they should be able to
detect both source and target formats.

param: string $tempdir the name of the backup directory
return: null|string null if not recognized, backup::FORMAT_xxx otherwise

description()   X-Ref
Returns the basic information about the converter

The returned array must contain the following keys:
'from' - the supported source format, eg. backup::FORMAT_MOODLE1
'to'   - the supported target format, eg. backup::FORMAT_MOODLE
'cost' - the cost of the conversion, non-negative non-zero integer

init()   X-Ref
Initialize the instance if needed, called by the constructor


create_workdir()   X-Ref
Prepares a new empty working directory


replace_tempdir()   X-Ref
Replaces the source backup directory with the converted version

If $CFG->keeptempdirectoriesonbackup is defined, the original source
source backup directory is kept for debugging purposes.

destroy()   X-Ref
Cleans up stuff after the execution

Note that we do not know if the execution was successful or not.
An exception might have been thrown.

Class: convert_exception  - X-Ref

General convert-related exception

__construct($errorcode, $a = null, $debuginfo = null)   X-Ref
Constructor

param: string $errorcode key for the corresponding error string
param: object $a extra words and phrases that might be required in the error string
param: string $debuginfo optional debugging information