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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] [Versions 401 and 402] [Versions 401 and 403]

Defines classes used for plugins management This library provides a unified interface to various plugin types in Moodle. It is mainly used by the plugins management admin page and the plugins check page during the upgrade.

Copyright: 2011 David Mudrak <david@moodle.com>
License: http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
File Size: 2430 lines (89 kb)
Included or required:0 times
Referenced: 0 times
Includes or requires: 1 file
 version.php

Defines 1 class

core_plugin_manager:: (63 methods):
  __construct()
  __clone()
  instance()
  reset_caches()
  get_plugin_types()
  load_installed_plugins()
  get_installed_plugins()
  load_enabled_plugins()
  get_enabled_plugins()
  load_present_plugins()
  get_present_plugins()
  get_plugins()
  get_plugins_of_type()
  init_pluginsinfo_property()
  resolve_plugininfo_class()
  get_subplugins_of_plugin()
  get_subplugins()
  get_parent_of_subplugin()
  plugin_name()
  plugintype_name()
  plugintype_name_plural()
  get_plugin_info()
  plugin_external_source()
  other_plugins_that_require()
  are_dependencies_satisfied()
  all_plugins_ok()
  resolve_requirements()
  resolve_core_requirements()
  resolve_dependency_requirements()
  check_explicitly_supported()
  is_remote_plugin_available()
  is_remote_plugin_installable()
  filter_installable()
  get_remote_plugin_info()
  get_remote_plugin_zip()
  unzip_plugin_file()
  get_plugin_zip_root_dir()
  missing_dependencies()
  can_uninstall_plugin()
  install_plugins()
  mtrace()
  get_uninstall_url()
  uninstall_plugin()
  some_plugins_updatable()
  load_available_updates_for_plugin()
  available_updates()
  is_plugin_folder_removable()
  is_plugintype_writable()
  get_plugintype_root()
  is_deleted_standard_plugin()
  standard_plugins_list()
  remove_plugin_folder()
  can_cancel_plugin_installation()
  can_cancel_plugin_upgrade()
  cancel_plugin_installation()
  list_cancellable_installations()
  archive_plugin_version()
  list_restorable_archives()
  reorder_plugin_types()
  is_directory_removable()
  common_uninstall_check()
  get_code_manager()
  get_update_api_client()


Class: core_plugin_manager  - X-Ref

Singleton class providing general plugins management functionality.

__construct()   X-Ref
Direct initiation not allowed, use the factory method {@link self::instance()}


__clone()   X-Ref
Sorry, this is singleton


instance()   X-Ref
Factory method for this class

return: core_plugin_manager the singleton instance

reset_caches($phpunitreset = false)   X-Ref
Reset all caches.

param: bool $phpunitreset

get_plugin_types()   X-Ref
Returns the result of {@link core_component::get_plugin_types()} ordered for humans

return: array (string)name => (string)location

load_installed_plugins()   X-Ref
Load list of installed plugins,
always call before using $this->installedplugins.

This method is caching results for all plugins.

get_installed_plugins($type)   X-Ref
Return list of installed plugins of given type.

param: string $type
return: array $name=>$version

load_enabled_plugins()   X-Ref
Load list of all enabled plugins,
call before using $this->enabledplugins.

This method is caching results from individual plugin info classes.

get_enabled_plugins($type)   X-Ref
Get list of enabled plugins of given type,
the result may contain missing plugins.

param: string $type
return: array|null  list of enabled plugins of this type, null if unknown

load_present_plugins()   X-Ref
Load list of all present plugins - call before using $this->presentplugins.


get_present_plugins($type)   X-Ref
Get list of present plugins of given type.

param: string $type
return: array|null  list of presnet plugins $name=>$diskversion, null if unknown

get_plugins()   X-Ref
Returns a tree of known plugins and information about them

return: array 2D array. The first keys are plugin type names (e.g. qtype);

get_plugins_of_type($type)   X-Ref
Returns list of known plugins of the given type.

This method returns the subset of the tree returned by {@link self::get_plugins()}.
If the given type is not known, empty array is returned.

param: string $type plugin type, e.g. 'mod' or 'workshopallocation'
return: \core\plugininfo\base[] (string)plugin name (e.g. 'workshop') => corresponding subclass of {@link \core\plugininfo\base}

init_pluginsinfo_property()   X-Ref
Init placeholder array for plugin infos.


resolve_plugininfo_class($type)   X-Ref
Find the plugin info class for given type.

param: string $type
return: string name of pluginfo class for give plugin type

get_subplugins_of_plugin($component)   X-Ref
Returns list of all known subplugins of the given plugin.

For plugins that do not provide subplugins (i.e. there is no support for it),
empty array is returned.

param: string $component full component name, e.g. 'mod_workshop'
return: array (string) component name (e.g. 'workshopallocation_random') => subclass of {@link \core\plugininfo\base}

get_subplugins()   X-Ref
Returns list of plugins that define their subplugins and the information
about them from the db/subplugins.json file.

return: array with keys like 'mod_quiz', and values the data from the

get_parent_of_subplugin($subplugintype)   X-Ref
Returns the name of the plugin that defines the given subplugin type

If the given subplugin type is not actually a subplugin, returns false.

param: string $subplugintype the name of subplugin type, eg. workshopform or quiz
return: false|string the name of the parent plugin, eg. mod_workshop

plugin_name($component)   X-Ref
Returns a localized name of a given plugin

param: string $component name of the plugin, eg mod_workshop or auth_ldap
return: string

plugintype_name($type)   X-Ref
Returns a localized name of a plugin typed in singular form

Most plugin types define their names in core_plugin lang file. In case of subplugins,
we try to ask the parent plugin for the name. In the worst case, we will return
the value of the passed $type parameter.

param: string $type the type of the plugin, e.g. mod or workshopform
return: string

plugintype_name_plural($type)   X-Ref
Returns a localized name of a plugin type in plural form

Most plugin types define their names in core_plugin lang file. In case of subplugins,
we try to ask the parent plugin for the name. In the worst case, we will return
the value of the passed $type parameter.

param: string $type the type of the plugin, e.g. mod or workshopform
return: string

get_plugin_info($component)   X-Ref
Returns information about the known plugin, or null

param: string $component frankenstyle component name.
return: \core\plugininfo\base|null the corresponding plugin information.

plugin_external_source($component)   X-Ref
Check to see if the current version of the plugin seems to be a checkout of an external repository.

param: string $component frankenstyle component name
return: false|string

other_plugins_that_require($component)   X-Ref
Get a list of any other plugins that require this one.

param: string $component frankenstyle component name.
return: array of frankensyle component names that require this one.

are_dependencies_satisfied($dependencies)   X-Ref
Check a dependencies list against the list of installed plugins.

param: array $dependencies compenent name to required version or ANY_VERSION.
return: bool true if all the dependencies are satisfied.

all_plugins_ok($moodleversion, &$failedplugins = array()   X-Ref
Checks all dependencies for all installed plugins

This is used by install and upgrade. The array passed by reference as the second
argument is populated with the list of plugins that have failed dependencies (note that
a single plugin can appear multiple times in the $failedplugins).

param: int $moodleversion the version from version.php.
param: array $failedplugins to return the list of plugins with non-satisfied dependencies
param: int $branch the current moodle branch, null if not provided
return: bool true if all the dependencies are satisfied for all plugins.

resolve_requirements(\core\plugininfo\base $plugin, $moodleversion=null, $moodlebranch=null)   X-Ref
Resolve requirements and dependencies of a plugin.

Returns an array of objects describing the requirement/dependency,
indexed by the frankenstyle name of the component. The returned array
can be empty. The objects in the array have following properties:

->(numeric)hasver
->(numeric)reqver
->(string)status
->(string)availability

param: \core\plugininfo\base $plugin the plugin we are checking
param: null|string|int|double $moodleversion explicit moodle core version to check against, defaults to $CFG->version
param: null|string|int $moodlebranch explicit moodle core branch to check against, defaults to $CFG->branch
return: array of objects

resolve_core_requirements(\core\plugininfo\base $plugin, $moodleversion, $moodlebranch)   X-Ref
Helper method to resolve plugin's requirements on the moodle core.

param: \core\plugininfo\base $plugin the plugin we are checking
param: string|int|double $moodleversion moodle core branch to check against
return: stdObject

resolve_dependency_requirements(\core\plugininfo\base $plugin, $otherpluginname,$requiredversion, $moodlebranch)   X-Ref
Helper method to resolve plugin's dependecies on other plugins.

param: \core\plugininfo\base $plugin the plugin we are checking
param: string $otherpluginname
param: string|int $requiredversion
param: string|int $moodlebranch explicit moodle core branch to check against, defaults to $CFG->branch
return: stdClass

check_explicitly_supported($plugin, $branch)   X-Ref
Helper method to determine whether a moodle version is explicitly supported.

param: \core\plugininfo\base $plugin the plugin we are checking
param: int $branch the moodle branch to check support for
return: string

is_remote_plugin_available($component, $version, $exactmatch)   X-Ref
Is the given plugin version available in the plugins directory?

See {@link self::get_remote_plugin_info()} for the full explanation of how the $version
parameter is interpretted.

param: string $component plugin frankenstyle name
param: string|int $version ANY_VERSION or the version number
param: bool $exactmatch false if "given version or higher" is requested
return: boolean

is_remote_plugin_installable($component, $version, &$reason = null, $checkremote = true)   X-Ref
Can the given plugin version be installed via the admin UI?

This check should be used whenever attempting to install a plugin from
the plugins directory (new install, available update, missing dependency).

param: string $component
param: int $version version number
param: string $reason returned code of the reason why it is not
param: bool $checkremote check this version availability on moodle server
return: boolean

filter_installable($remoteinfos)   X-Ref
Given the list of remote plugin infos, return just those installable.

This is typically used on lists returned by
{@link self::available_updates()} or {@link self::missing_dependencies()}
to perform bulk installation of remote plugins.

param: array $remoteinfos list of {@link \core\update\remote_info}
return: array

get_remote_plugin_info($component, $version, $exactmatch)   X-Ref
Returns information about a plugin in the plugins directory.

This is typically used when checking for available dependencies (in
which case the $version represents minimal version we need), or
when installing an available update or a new plugin from the plugins
directory (in which case the $version is exact version we are
interested in). The interpretation of the $version is controlled
by the $exactmatch argument.

If a plugin with the given component name is found, data about the
plugin are returned as an object. The ->version property of the object
contains the information about the particular plugin version that
matches best the given critera. The ->version property is false if no
suitable version of the plugin was found (yet the plugin itself is
known).

See {@link \core\update\api::validate_pluginfo_format()} for the
returned data structure.

param: string $component plugin frankenstyle name
param: string|int $version ANY_VERSION or the version number
param: bool $exactmatch false if "given version or higher" is requested
return: \core\update\remote_info|bool

get_remote_plugin_zip($url, $md5)   X-Ref
Obtain the plugin ZIP file from the given URL

The caller is supposed to know both downloads URL and the MD5 hash of
the ZIP contents in advance, typically by using the API requests against
the plugins directory.

param: string $url
param: string $md5
return: string|bool full path to the file, false on error

unzip_plugin_file($zipfilepath, $targetdir, $rootdir = '')   X-Ref
Extracts the saved plugin ZIP file.

Returns the list of files found in the ZIP. The format of that list is
array of (string)filerelpath => (bool|string) where the array value is
either true or a string describing the problematic file.

param: string $zipfilepath full path to the saved ZIP file
param: string $targetdir full path to the directory to extract the ZIP file to
param: string $rootdir explicitly rename the root directory of the ZIP into this non-empty value
return: array list of extracted files as returned by {@link zip_packer::extract_to_pathname()}

get_plugin_zip_root_dir($zipfilepath)   X-Ref
Detects the plugin's name from its ZIP file.

Plugin ZIP packages are expected to contain a single directory and the
directory name would become the plugin name once extracted to the Moodle
dirroot.

param: string $zipfilepath full path to the ZIP files
return: string|bool false on error

missing_dependencies($availableonly=false)   X-Ref
Return a list of missing dependencies.

This should provide the full list of plugins that should be installed to
fulfill the requirements of all plugins, if possible.

param: bool $availableonly return only available missing dependencies
return: array of \core\update\remote_info|bool indexed by the component name

can_uninstall_plugin($component)   X-Ref
Is it possible to uninstall the given plugin?

False is returned if the plugininfo subclass declares the uninstall should
not be allowed via {@link \core\plugininfo\base::is_uninstall_allowed()} or if the
core vetoes it (e.g. becase the plugin or some of its subplugins is required
by some other installed plugin).

param: string $component full frankenstyle name, e.g. mod_foobar
return: bool

install_plugins(array $plugins, $confirmed, $silent)   X-Ref
Perform the installation of plugins.

If used for installation of remote plugins from the Moodle Plugins
directory, the $plugins must be list of {@link \core\update\remote_info}
object that represent installable remote plugins. The caller can use
{@link self::filter_installable()} to prepare the list.

If used for installation of plugins from locally available ZIP files,
the $plugins should be list of objects with properties ->component and
->zipfilepath.

The method uses {@link mtrace()} to produce direct output and can be
used in both web and cli interfaces.

param: array $plugins list of plugins
param: bool $confirmed should the files be really deployed into the dirroot?
param: bool $silent perform without output
return: bool true on success

mtrace($msg, $eol=PHP_EOL, $debug=null)   X-Ref
Outputs the given message via {@link mtrace()}.

If $debug is provided, then the message is displayed only at the given
debugging level (e.g. DEBUG_DEVELOPER to display the message only if the
site has developer debugging level selected).

param: string $msg message
param: string $eol end of line
param: null|int $debug null to display always, int only on given debug level

get_uninstall_url($component, $return = 'overview')   X-Ref
Returns uninstall URL if exists.

param: string $component
param: string $return either 'overview' or 'manage'
return: moodle_url uninstall URL, null if uninstall not supported

uninstall_plugin($component, progress_trace $progress)   X-Ref
Uninstall the given plugin.

Automatically cleans-up all remaining configuration data, log records, events,
files from the file pool etc.

In the future, the functionality of {@link uninstall_plugin()} function may be moved
into this method and all the code should be refactored to use it. At the moment, we
mimic this future behaviour by wrapping that function call.

param: string $component
param: progress_trace $progress traces the process
return: bool true on success, false on errors/problems

some_plugins_updatable()   X-Ref
Checks if there are some plugins with a known available update

return: bool true if there is at least one available update

load_available_updates_for_plugin($component)   X-Ref
Returns list of available updates for the given component.

This method should be considered as internal API and is supposed to be
called by {@link \core\plugininfo\base::available_updates()} only
to lazy load the data once they are first requested.

param: string $component frankenstyle name of the plugin
return: null|array array of \core\update\info objects or null

available_updates()   X-Ref
Returns a list of all available updates to be installed.

This is used when "update all plugins" action is performed at the
administration UI screen.

Returns array of remote info objects indexed by the plugin
component. If there are multiple updates available (typically a mix of
stable and non-stable ones), we pick the most mature most recent one.

Plugins without explicit maturity are considered more mature than
release candidates but less mature than explicit stable (this should be
pretty rare case).

return: array (string)component => (\core\update\remote_info)remoteinfo

is_plugin_folder_removable($component)   X-Ref
Check to see if the given plugin folder can be removed by the web server process.

param: string $component full frankenstyle component
return: bool

is_plugintype_writable($plugintype)   X-Ref
Is it possible to create a new plugin directory for the given plugin type?

param: string $plugintype
return: boolean

get_plugintype_root($plugintype)   X-Ref
Returns the full path of the root of the given plugin type

Null is returned if the plugin type is not known. False is returned if
the plugin type root is expected but not found. Otherwise, string is
returned.

param: string $plugintype
return: string|bool|null

is_deleted_standard_plugin($type, $name)   X-Ref
Defines a list of all plugins that were originally shipped in the standard Moodle distribution,
but are not anymore and are deleted during upgrades.

The main purpose of this list is to hide missing plugins during upgrade.

param: string $type plugin type
param: string $name plugin name
return: bool

standard_plugins_list($type)   X-Ref
Defines a white list of all plugins shipped in the standard Moodle distribution

param: string $type
return: false|array array of standard plugins or false if the type is unknown

remove_plugin_folder(\core\plugininfo\base $plugin)   X-Ref
Remove the current plugin code from the dirroot.

If removing the currently installed version (which happens during
updates), we archive the code so that the upgrade can be cancelled.

To prevent accidental data-loss, we also archive the existing plugin
code if cancelling installation of it, so that the developer does not
loose the only version of their work-in-progress.

param: \core\plugininfo\base $plugin

can_cancel_plugin_installation(\core\plugininfo\base $plugin)   X-Ref
Can the installation of the new plugin be cancelled?

Subplugins can be cancelled only via their parent plugin, not separately
(they are considered as implicit requirements if distributed together
with the main package).

param: \core\plugininfo\base $plugin
return: bool

can_cancel_plugin_upgrade(\core\plugininfo\base $plugin)   X-Ref
Can the upgrade of the existing plugin be cancelled?

Subplugins can be cancelled only via their parent plugin, not separately
(they are considered as implicit requirements if distributed together
with the main package).

param: \core\plugininfo\base $plugin
return: bool

cancel_plugin_installation($component)   X-Ref
Removes the plugin code directory if it is not installed yet.

This is intended for the plugins check screen to give the admin a chance
to cancel the installation of just unzipped plugin before the database
upgrade happens.

param: string $component

list_cancellable_installations()   X-Ref
Returns plugins, the installation of which can be cancelled.

return: array [(string)component] => (\core\plugininfo\base)plugin

archive_plugin_version(\core\plugininfo\base $plugin)   X-Ref
Archive the current on-disk plugin code.

param: \core\plugiinfo\base $plugin
return: bool

list_restorable_archives()   X-Ref
Returns list of all archives that can be installed to cancel the plugin upgrade.

return: array [(string)component] => {(string)->component, (string)->zipfilepath}

reorder_plugin_types(array $types)   X-Ref
Reorders plugin types into a sequence to be displayed

For technical reasons, plugin types returned by {@link core_component::get_plugin_types()} are
in a certain order that does not need to fit the expected order for the display.
Particularly, activity modules should be displayed first as they represent the
real heart of Moodle. They should be followed by other plugin types that are
used to build the courses (as that is what one expects from LMS). After that,
other supportive plugin types follow.

param: array $types associative array
return: array same array with altered order of items

is_directory_removable($fullpath)   X-Ref
Check if the given directory can be removed by the web server process.

This recursively checks that the given directory and all its contents
it writable.

param: string $fullpath
return: boolean

common_uninstall_check(\core\plugininfo\base $pluginfo)   X-Ref
Helper method that implements common uninstall prerequisites

param: \core\plugininfo\base $pluginfo
return: bool

get_code_manager()   X-Ref
Returns a code_manager instance to be used for the plugins code operations.

return: \core\update\code_manager

get_update_api_client()   X-Ref
Returns a client for https://download.moodle.org/api/

return: \core\update\api