component_installer Class Reference

This class is used to check, download and install items from download.moodle.org to the moodledata directory. More...

Public Member Functions
	__construct ($sourcebase, $zippath, $zipfilename, $md5filename='', $destpath='')
	Array of cached components to avoid to.
	change_zip_file ($newzipfilename)
	This function will change the zip file to install on the fly to allow the class to process different components of the same md5 file without intantiating more objects.
object	check_requisites ()
	This function will check if everything is properly set to begin one installation.
	component_installer ($sourcebase, $zippath, $zipfilename, $md5filename='', $destpath='')
	Old syntax of class constructor.
	get_all_components_md5 ()
	This function allows you to retrieve the complete array of components found in the md5filename.
	get_component_md5 ()
	This function will download the specified md5 file, looking for the current componentname, returning its md5 field and storing extramd5info if present.
	get_error ()
	This function returns the errorstring.
	get_extra_md5_field ()
	This function returns the extramd5 field (optional in md5 file)
object	get_local_md5 ()
	This function will get the local md5 value of the installed component.
	install ()
	This function will perform the full installation if needed, i.e.
	need_upgrade ()
	This function will detect if remote component needs to be installed because it's different from the local one.

Public Attributes
array	$cachedmd5components
	Flag to see if requisites check has been passed ok.
	$componentname
	Name of the .md5 file to be read.
	$destpath
	Name of the component.
	$errorstring
	Relative path (from moodledata) where the .zip file will be expanded.
	$extramd5info
	Latest error produced. It will contain one lang string key.
	$md5filename
	Name of the .zip file to be downloaded.
	$requisitesok
	Contents of the optional third field in the .md5 file.
string	$sourcebase
	$zipfilename
	Relative path (from sourcebase) where the downloadeable item resides.
	$zippath
	Full http URL, base for downloadable items.

Detailed Description

This class is used to check, download and install items from download.moodle.org to the moodledata directory.

It always return true/false in all their public methods to say if execution has ended succesfuly or not. If there is any problem its getError() method can be called, returning one error string to be used with the standard get/print_string() functions.

License

http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

Constructor & Destructor Documentation

__construct()

component_installer::__construct	(		$sourcebase,
			$zippath,
			$zipfilename,
			$md5filename = '',
			$destpath = '' )

Array of cached components to avoid to.

download the same md5 file more than once per request. Standard constructor of the class. It will initialize all attributes. without performing any check at all.

Parameters

string	$sourcebase	Full http URL, base for downloadeable items
string	$zippath	Relative path (from sourcebase) where the downloadeable item resides
string	$zipfilename	Name of the .zip file to be downloaded
string	$md5filename	Name of the .md5 file to be read (default '' = same than zipfilename)
string	$destpath	Relative path (from moodledata) where the .zip file will be expanded (default='' = moodledataitself)

Return values

object

Member Function Documentation

change_zip_file()

component_installer::change_zip_file

(

$newzipfilename

)

This function will change the zip file to install on the fly to allow the class to process different components of the same md5 file without intantiating more objects.

Parameters

string

$newzipfilename

New zip filename to process

Return values

boolean

true/false

check_requisites()

object component_installer::check_requisites

(

)

This function will check if everything is properly set to begin one installation.

Also, it will check for required settings and will fill everything as needed.

Return values

boolean

true/false (plus detailed error in errorstring)

component_installer()

component_installer::component_installer	(		$sourcebase,
			$zippath,
			$zipfilename,
			$md5filename = '',
			$destpath = '' )

Old syntax of class constructor.

Deprecated in PHP7.

Deprecated

since Moodle 3.1

get_all_components_md5()

component_installer::get_all_components_md5

(

)

This function allows you to retrieve the complete array of components found in the md5filename.

Return values

bool|array

array of components in md5 file or false if error

get_component_md5()

component_installer::get_component_md5

(

)

This function will download the specified md5 file, looking for the current componentname, returning its md5 field and storing extramd5info if present.

Also it caches results to cachedmd5components for better performance in the same request.

Return values

mixed

md5 present in server (or false if error)

get_error()

component_installer::get_error

(

)

This function returns the errorstring.

Return values

string

the error string

get_extra_md5_field()

component_installer::get_extra_md5_field

(

)

This function returns the extramd5 field (optional in md5 file)

Return values

string

the extramd5 field

get_local_md5()

object component_installer::get_local_md5

(

)

This function will get the local md5 value of the installed component.

Return values

bool|string

md5 of the local component (false on error)

install()

component_installer::install

(

)

This function will perform the full installation if needed, i.e.

compare md5 values, download, unzip, install and regenerate local md5 file

@uses COMPONENT_ERROR @uses COMPONENT_UPTODATE @uses COMPONENT_ERROR @uses COMPONENT_INSTALLED

Return values

int	COMPONENT_(ERROR | UPTODATE | INSTALLED)

need_upgrade()

component_installer::need_upgrade

(

)

This function will detect if remote component needs to be installed because it's different from the local one.

@uses COMPONENT_ERROR @uses COMPONENT_UPTODATE @uses COMPONENT_NEEDUPDATE

Return values

int	COMPONENT_(ERROR | UPTODATE | NEEDUPDATE)

Member Data Documentation

$destpath

component_installer::$destpath

Name of the component.

Must be the zip name without the extension. And it defines a lot of things: the md5 line to search for, the default m5 file name and the name of the root dir stored inside the zip file

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

• lib/componentlib.class.php