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See Release Notes
Long Term Support Release

  • Bug fixes for general core bugs in 4.1.x will end 13 November 2023 (12 months).
  • Bug fixes for security issues in 4.1.x will end 10 November 2025 (36 months).
  • PHP version: minimum PHP 7.4.0 Note: minimum PHP version has increased since Moodle 4.0. PHP 8.0.x is supported too.

Differences Between: [Versions 310 and 401] [Versions 311 and 401] [Versions 39 and 401] [Versions 400 and 401]

This library includes all the necessary stuff to use the one-click download and install feature of Moodle, used to keep updated some items like languages, pear, enviroment... i.e, components. It has been developed harcoding some important limits that are explained below: - It only can check, download and install items under moodledata. - Every downloadeable item must be one zip file. - The zip file root content must be 1 directory, i.e, everything is stored under 1 directory. - Zip file name and root directory must have the same name (but the .zip extension, of course). - Every .zip file must be defined in one .md5 file that will be stored in the same remote directory than the .zip file. - The name of such .md5 file is free, although it's recommended to use the same name than the .zip (that's the default assumption if no specified). - Every remote .md5 file will be a comma separated (CVS) file where each line will follow this format: - Field 1: name of the zip file (without extension). Mandatory. - Field 2: md5 of the zip file. Mandatory. - Field 3: whatever you want (or need). Optional. -Every local .md5 file will: - Have the zip file name (without the extension) plus -md5 - Will reside inside the expanded zip file dir - Will contain the md5 od the latest installed component With all these details present, the process will perform this tasks: - Perform security checks. Only admins are allowed to use this for now. - Read the .md5 file from source (1). - Extract the correct line for the .zip being requested. - Compare it with the local .md5 file (2). - If different: - Download the newer .zip file from source. - Calculate its md5 (3). - Compare (1) and (3). - If equal: - Delete old directory. - Uunzip the newer .zip file. - Create the new local .md5 file. - Delete the .zip file. - If different: - ERROR. Old package won't be modified. We shouldn't reach here ever. - If component download is not possible, a message text about how to do the process manually (remotedownloaderror) must be displayed to explain it.

Copyright: (C) 2001-3001 Eloy Lafuente (stronk7) {@link http://contiento.com}
License: http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
File Size: 840 lines (30 kb)
Included or required:0 times
Referenced: 0 times
Includes or requires: 0 files

Defines 4 classes

component_installer:: (2 methods):
  __construct()
  component_installer()

name:: (9 methods):
  check_requisites()
  install()
  need_upgrade()
  change_zip_file()
  get_local_md5()
  get_component_md5()
  get_all_components_md5()
  get_error()
  get_extra_md5_field()

lang_installer:: (11 methods):
  __construct()
  set_queue()
  run()
  lang_pack_url()
  get_remote_list_of_languages()
  add_to_queue()
  is_queued()
  was_processed()
  mark_processed()
  get_parent_language()
  install_language_pack()

lang_installer_exception:: (1 method):
  __construct()


Class: component_installer  - X-Ref

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.

__construct($sourcebase, $zippath, $zipfilename, $md5filename='', $destpath='')   X-Ref
Standard constructor of the class. It will initialize all attributes.
without performing any check at all.

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

component_installer($sourcebase, $zippath, $zipfilename, $md5filename='', $destpath='')   X-Ref
Old syntax of class constructor. Deprecated in PHP7.


Class: name  - X-Ref

check_requisites()   X-Ref
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: boolean true/false (plus detailed error in errorstring)

install()   X-Ref
This function will perform the full installation if needed, i.e.
compare md5 values, download, unzip, install and regenerate
local md5 file

return: int COMPONENT_(ERROR | UPTODATE | INSTALLED)

need_upgrade()   X-Ref
This function will detect if remote component needs to be installed
because it's different from the local one

return: int COMPONENT_(ERROR | UPTODATE | NEEDUPDATE)

change_zip_file($newzipfilename)   X-Ref
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.

param: string $newzipfilename New zip filename to process
return: boolean true/false

get_local_md5()   X-Ref
This function will get the local md5 value of the installed
component.

return: bool|string md5 of the local component (false on error)

get_component_md5()   X-Ref
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: mixed md5 present in server (or false if error)

get_all_components_md5()   X-Ref
This function allows you to retrieve the complete array of components found in
the md5filename

return: bool|array array of components in md5 file or false if error

get_error()   X-Ref
This function returns the errorstring

return: string the error string

get_extra_md5_field()   X-Ref
No description

Class: lang_installer  - X-Ref

Language packs installer

This class wraps the functionality provided by {@link component_installer}
and adds support for installing a set of language packs.

Given an array of required language packs, this class fetches them all
and installs them. It detects eventual dependencies and installs
all parent languages, too.

__construct($langcode = '')   X-Ref
Prepare the installer

param: string|array $langcode a code of the language to install

set_queue($langcodes)   X-Ref
Sets the queue of language packs to be installed

param: string|array $langcodes language code like 'cs' or a list of them

run()   X-Ref
Runs the installer

This method calls {@link self::install_language_pack} for every language in the
queue. If a dependency is detected, the parent language is added to the queue.

return: array results, array of self::RESULT_xxx constants indexed by language code

lang_pack_url($langcode = '')   X-Ref
Returns the URL where a given language pack can be downloaded

Alternatively, if the parameter is empty, returns URL of the page with the
list of all available language packs.

param: string $langcode language code like 'cs' or empty for unknown
return: string URL

get_remote_list_of_languages()   X-Ref
Returns the list of available language packs from download.moodle.org

return: array|bool false if can not download

add_to_queue($langcodes)   X-Ref
Adds a language pack (or a list of them) to the queue

param: string|array $langcodes code of the language to install or a list of them

is_queued($langcode = '')   X-Ref
Checks if the given language is queued or if the queue is empty

param: string $langcode language code or empty string for "any"
return: boolean

was_processed($langcode)   X-Ref
Checks if the given language has already been processed by this instance

param: string $langcode
return: boolean

mark_processed($langcode)   X-Ref
Mark the given language pack as processed

param: string $langcode

get_parent_language($langcode)   X-Ref
Returns a parent language of the given installed language

param: string $langcode
return: string parent language's code

install_language_pack($langcode)   X-Ref
Perform the actual language pack installation

param: string $langcode
return: int return status

Class: lang_installer_exception  - X-Ref

Exception thrown by {@link lang_installer}

__construct($errorcode, $debuginfo = null)   X-Ref
No description