convert_helper Class Reference

Provides various functionality via its static methods. More...

Static Public Member Functions
static	available_converters ($restore=true)
	Returns the list of all available converters and loads their classes. More...
static	detect_moodle2_format ($tempdir)
	Detects if the given folder contains an unpacked moodle2 backup. More...
static	export_converter_dependencies ($converter, $dependency)
static	generate_id ($entropy)
static	get_inforef ($contextid)
static	set_inforef ($contextid)
	Inserts an inforef into the conversion temp table.
static	to_moodle2_format ($tempdir, $format=null, $logger=null)
	Converts the given directory with the backup into moodle2 format. More...

Static Protected Member Functions
static	choose_conversion_path ($format, array $descriptions)
	end of public API ////////////////////////////////////////////////////// More...

Detailed Description

Provides various functionality via its static methods.

Member Function Documentation

available_converters()

static convert_helper::available_converters (   $restore = true )

static

Returns the list of all available converters and loads their classes.

Converter must be installed as a directory in backup/converter/ and its method is_available() must return true to get to the list.

See also

base_converter::is_available()

Return values

array

of strings

choose_conversion_path()

static convert_helper::choose_conversion_path (   $format, array  $descriptions  )

staticprotected

end of public API //////////////////////////////////////////////////////

Choose the best conversion path for the given format

Given the source format and the list of available converters and their properties, this methods picks the most effective way how to convert the source format into the target moodle2 format. The method returns a list of converters that should be called, in order.

This implementation uses Dijkstra's algorithm to find the shortest way through the oriented graph.

See also

http://en.wikipedia.org/wiki/Dijkstra's_algorithm

Author

David Mudrak david.nosp@m.@moo.nosp@m.dle.c.nosp@m.om

Parameters

string	$format	the source backup format, one of backup::FORMAT_xxx
array	$descriptions	list of base_converter::description() indexed by the converter name

Return values

array

ordered list of converter names to call (may be empty if not reachable)

detect_moodle2_format()

static convert_helper::detect_moodle2_format (   $tempdir )

static

Detects if the given folder contains an unpacked moodle2 backup.

Parameters

string

$tempdir

the name of the backup directory

Return values

boolean

true if moodle2 format detected, false otherwise

generate_id()

static convert_helper::generate_id (   $entropy )

static

Parameters

string

$entropy

Return values

string

random identifier

to_moodle2_format()

static convert_helper::to_moodle2_format (   $tempdir,   $format = null,   $logger = null  )

static

Converts the given directory with the backup into moodle2 format.

Parameters

string	$tempdir	The directory to convert
string	$format	The current format, if already detected
	base_logger|null	if the conversion should be logged, use this logger

Exceptions

convert_helper_exception

Return values

bool	false if unable to find the conversion path, true otherwise

---

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

• backup/util/helper/convert_helper.class.php