User profile field condition. More...

Inheritance diagram for availability_profile\condition:

Public Member Functions
	__construct ($structure)
	Constructor. More...

	__toString ()
	Display a representation of this condition (used for debugging). More...

	check_available ($not, core_availability\info $info, $grabthelot, $userid)
	Determines whether this particular item is currently available according to the availability criteria. More...

	check_available ($not, info $info, $grabthelot, $userid)

	filter_user_list (array $users, $not, core_availability\info $info, capability_checker $checker)
	Tests this condition against a user list. More...

	filter_user_list (array $users, $not, core_availability\info $info, core_availability\capability_checker $checker)

	get_description ($full, $not, core_availability\info $info)
	Obtains a string describing this restriction (whether or not it actually applies). More...

	get_standalone_description ($full, $not, info $info)
	Obtains a string describing this restriction, used when there is only a single restriction to display. More...

	get_user_list_sql ($not, core_availability\info $info, $onlyactive)
	Obtains SQL that returns a list of enrolled users that has been filtered by the conditions applied in the availability API, similar to calling get_enrolled_users and then filter_user_list. More...

	get_user_list_sql ($not, core_availability\info $info, $onlyactive)

	include_after_restore ($restoreid, $courseid, base_logger $logger, $name, base_task $task)
	Checks whether this node should be included after restore or not. More...

	is_applied_to_user_lists ()
	Checks whether this condition applies to user lists. More...

	is_available ($not, core_availability\info $info, $grabthelot, $userid)
	Determines whether a particular item is currently available according to this availability condition. More...

	is_available_for_all ($not=false)
	Checks whether this condition is actually going to be available for all users under normal circumstances. More...

	save ()
	Saves tree data back to a structure object. More...

	update_after_restore ($restoreid, $courseid, base_logger $logger, $name)
	Updates this node after restore, returning true if anything changed. More...

	update_dependency_id ($table, $oldid, $newid)
	Updates this node if it contains any references (dependencies) to the given table and id. More...

Static Public Member Functions
static	completion_value_used ($course, $cmid)
	If the plugin has been configured to rely on a particular activity's completion value, it should return true here. More...

static	get_custom_profile_fields ()
	Gets data about custom profile fields. More...

static	get_json ($customfield, $fieldname, $operator, $value=null)
	Returns a JSON object which corresponds to a condition of this type. More...

static	wipe_static_cache ()
	Wipes the static cache (for use in unit tests).

Public Attributes
string const	OP_CONTAINS = 'contains'
	Operator: field contains value.

string const	OP_DOES_NOT_CONTAIN = 'doesnotcontain'
	Operator: field does not contain value.

string const	OP_ENDS_WITH = 'endswith'
	Operator: field ends with value.

string const	OP_IS_EMPTY = 'isempty'
	Operator: field is empty.

string const	OP_IS_EQUAL_TO = 'isequalto'
	Operator: field equals value.

string const	OP_IS_NOT_EMPTY = 'isnotempty'
	Operator: field is not empty.

string const	OP_STARTS_WITH = 'startswith'
	Operator: field starts with value.

Protected Member Functions
	get_cached_user_profile_field ($userid)
	Return the value for a user's profile field. More...

	get_debug_string ()
	Obtains a representation of the options of this condition as a string, for debugging. More...

	get_type ()
	Gets the type name (e.g. More...

Static Protected Member Functions
static	is_field_condition_met ($operator, $uservalue, $value)
	Returns true if a field meets the required conditions, false otherwise. More...

static	unique_sql_parameter (array &$params, $value)
	Utility function for generating SQL parameters (because we can't use ? parameters because get_enrolled_sql has infected us with horrible named parameters). More...

Protected Attributes
int	$customfield = ''
	Field name (for custom fields) or '' if standard field.

string	$operator
	Operator type (OP_xx constant)

string	$standardfield = ''
	Field name (for standard fields) or '' if custom field.

string	$value = ''
	Expected value for field.

Static Protected Attributes
static array null	$customprofilefields = null
	Array of custom profile fields (static cache within request)

static int	$uniquesqlparametercounter = 1
	Counter to be used in tree_node::unique_sql_parameter().

Detailed Description

User profile field condition.

Copyright: 2014 The Open University

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

Constructor & Destructor Documentation

◆ __construct()

availability_profile\condition::__construct ( $structure )

Constructor.

Parameters

stdClass $structure Data structure from JSON decode

Exceptions

coding_exception If invalid data structure.

Member Function Documentation

◆ __toString()

core_availability\condition::__toString ( )

inherited

Display a representation of this condition (used for debugging).

Return values

string Text representation of condition

◆ check_available()

core_availability\tree_node::check_available	(		$not,
		core_availability\info	$info,
			$grabthelot,
			$userid
	)

abstractinherited

Determines whether this particular item is currently available according to the availability criteria.

This does not include the 'visible' setting (i.e. this might return true even if visible is false); visible is handled independently.
This does not take account of the viewhiddenactivities capability. That should apply later.

The $not option is potentially confusing. This option always indicates the 'real' value of NOT. For example, a condition inside a 'NOT AND' group will get this called with $not = true, but if you put another 'NOT OR' group inside the first group, then a condition inside that will be called with $not = false. We need to use the real values, rather than the more natural use of the current value at this point inside the tree, so that the information displayed to users makes sense.

Parameters

bool	$not	Set true if we are inverting the condition
core_availability::info	$info	Item we're checking
bool	$grabthelot	Performance hint: if true, caches information required for all course-modules, to make the front page and similar pages work more quickly (works only for current user)
int	$userid	User ID to check availability for

Return values

result Availability check result

◆ completion_value_used()

static core_availability\condition::completion_value_used	(	$course,
		$cmid
	)

staticinherited

If the plugin has been configured to rely on a particular activity's completion value, it should return true here.

(This is necessary so that we know the course page needs to update when that activity becomes complete.)

Default implementation returns false.

Parameters

stdClass	$course	Moodle course object
int	$cmid	ID of activity whose completion value is considered

Return values

boolean True if the availability of something else may rely on it

Reimplemented in availability_completion\condition.

◆ filter_user_list()

core_availability\tree_node::filter_user_list	(	array	$users,
			$not,
		core_availability\info	$info,
		capability_checker	$checker
	)

inherited

Tests this condition against a user list.

Users who do not meet the condition will be removed from the list, unless they have the ability to view hidden activities/sections.

This function must be implemented if is_applied_to_user_lists returns true. Otherwise it will not be called.

The function must operate efficiently, e.g. by using a fixed number of database queries regardless of how many users are in the list.

Within this function, if you need to check capabilities, please use the provided checker which caches results where possible.

Conditions do not need to check the viewhiddenactivities or viewhiddensections capabilities. These are handled by core_availability::info::filter_user_list.

Parameters

array	$users	Array of userid => object
bool	$not	True if this condition is applying in negative mode
core_availability::info	$info	Item we're checking
capability_checker	$checker

Return values

array Filtered version of input array

Exceptions

coding_exception If called on a condition that doesn't apply to user lists

◆ get_cached_user_profile_field()

availability_profile\condition::get_cached_user_profile_field ( $userid )

protected

Return the value for a user's profile field.

Parameters

int $userid User ID

Return values

string|bool Value, or false if user does not have a value for this field

◆ get_custom_profile_fields()

static availability_profile\condition::get_custom_profile_fields ( )

static

Gets data about custom profile fields.

Cached statically in current request.

This only includes fields which can be tested by the system (those whose data is cached in $USER object) - basically doesn't include textarea type fields.

Return values

array Array of records indexed by shortname

◆ get_debug_string()

availability_profile\condition::get_debug_string ( )

protected

Obtains a representation of the options of this condition as a string, for debugging.

Return values

string Text representation of parameters

Reimplemented from core_availability\condition.

◆ get_description()

availability_profile\condition::get_description	(		$full,
			$not,
		core_availability\info	$info
	)

Obtains a string describing this restriction (whether or not it actually applies).

Used to obtain information that is displayed to students if the activity is not available to them, and for staff to see what conditions are.

The $full parameter can be used to distinguish between 'staff' cases (when displaying all information about the activity) and 'student' cases (when displaying only conditions they don't meet).

If implementations require a course or modinfo, they should use the get methods in $info.

The special string <AVAILABILITY_CMNAME_123> can be returned, where 123 is any number. It will be replaced with the correctly-formatted name for that activity.

Parameters

bool	$full	Set true if this is the 'full information' view
bool	$not	Set true if we are inverting the condition
info	$info	Item we're checking

Return values

string Information string (for admin) about all restrictions on this item

Reimplemented from core_availability\condition.

◆ get_json()

static availability_profile\condition::get_json	(	$customfield,
		$fieldname,
		$operator,
		$value = `null`
	)

static

Returns a JSON object which corresponds to a condition of this type.

Intended for unit testing, as normally the JSON values are constructed by JavaScript code.

Parameters

bool	$customfield	True if this is a custom field
string	$fieldname	Field name
string	$operator	Operator name (OP_xx constant)
string \| null	$value	Value (not required for some operator types)

Return values

stdClass Object representing condition

◆ get_standalone_description()

core_availability\condition::get_standalone_description	(		$full,
			$not,
		info	$info
	)

inherited

Obtains a string describing this restriction, used when there is only a single restriction to display.

(I.e. this provides a 'short form' rather than showing in a list.)

Default behaviour sticks the prefix text, normally displayed above the list, in front of the standard get_description call.

If implementations require a course or modinfo, they should use the get methods in $info.

The special string <AVAILABILITY_CMNAME_123> can be returned, where 123 is any number. It will be replaced with the correctly-formatted name for that activity.

Parameters

bool	$full	Set true if this is the 'full information' view
bool	$not	Set true if we are inverting the condition
info	$info	Item we're checking

Return values

string Information string (for admin) about all restrictions on this item

Reimplemented in availability_date\condition.

◆ get_type()

core_availability\condition::get_type ( )

protectedinherited

Gets the type name (e.g.

'date' for availability_date) of plugin.

Return values

string The type name for this plugin

◆ get_user_list_sql()

core_availability\tree_node::get_user_list_sql	(		$not,
		core_availability\info	$info,
			$onlyactive
	)

inherited

Obtains SQL that returns a list of enrolled users that has been filtered by the conditions applied in the availability API, similar to calling get_enrolled_users and then filter_user_list.

As for filter_user_list, this ONLY filters out users with conditions that are marked as applying to user lists. For example, group conditions are included but date conditions are not included.

The returned SQL is a query that returns a list of user IDs. It does not include brackets, so you neeed to add these to make it into a subquery. You would normally use it in an SQL phrase like "WHERE u.id IN ($sql)".

The SQL will be complex and may be slow. It uses named parameters (sorry, I know they are annoying, but it was unavoidable here).

If there are no conditions, the returned result is array('', array()).

Conditions do not need to check the viewhiddenactivities or viewhiddensections capabilities. These are handled by core_availability::info::get_user_list_sql.

Parameters

bool	$not	True if this condition is applying in negative mode
core_availability::info	$info	Item we're checking
bool	$onlyactive	If true, only returns active enrolments

Return values

array Array with two elements: SQL subquery and parameters array

Exceptions

coding_exception If called on a condition that doesn't apply to user lists

◆ include_after_restore()

core_availability\tree_node::include_after_restore	(		$restoreid,
			$courseid,
		base_logger	$logger,
			$name,
		base_task	$task
	)

inherited

Checks whether this node should be included after restore or not.

The node may be removed depending on restore settings, which you can get from the $task object.

By default nodes are still included after restore.

Parameters

string	$restoreid	Restore ID
int	$courseid	ID of target course
base_logger	$logger	Logger for any warnings
string	$name	Name of this item (for use in warning messages)
base_task	$task	Current restore task

Return values

bool	True if there was any change

Reimplemented in availability_group\condition, and availability_grouping\condition.

◆ is_applied_to_user_lists()

availability_profile\condition::is_applied_to_user_lists ( )

Checks whether this condition applies to user lists.

The default is false (the condition is used to control access, but does not prevent the student from appearing in lists).

For example, group conditions apply to user lists: we do not want to include a student in a list of users if they are prohibited from accessing the activity because they don't belong to a relevant group. However, date conditions do not apply - we still want to show users in a list of people who might have submitted an assignment, even if they are no longer able to access the assignment in question because there is a date restriction.

The general idea is that conditions which are likely to be permanent (group membership, user profile) apply to user lists. Conditions which are likely to be temporary (date, grade requirement) do not.

Conditions which do apply to user lists must implement the filter_user_list function.

Return values

bool	True if this condition applies to user lists

Reimplemented from core_availability\tree_node.

◆ is_available()

availability_profile\condition::is_available	(		$not,
		core_availability\info	$info,
			$grabthelot,
			$userid
	)

Determines whether a particular item is currently available according to this availability condition.

If implementations require a course or modinfo, they should use the get methods in $info.

The $not option is potentially confusing. This option always indicates the 'real' value of NOT. For example, a condition inside a 'NOT AND' group will get this called with $not = true, but if you put another 'NOT OR' group inside the first group, then a condition inside that will be called with $not = false. We need to use the real values, rather than the more natural use of the current value at this point inside the tree, so that the information displayed to users makes sense.

Parameters

bool	$not	Set true if we are inverting the condition
info	$info	Item we're checking
bool	$grabthelot	Performance hint: if true, caches information required for all course-modules, to make the front page and similar pages work more quickly (works only for current user)
int	$userid	User ID to check availability for

Return values

bool	True if available

Reimplemented from core_availability\condition.

◆ is_available_for_all()

core_availability\condition::is_available_for_all ( $not = false )

inherited

Checks whether this condition is actually going to be available for all users under normal circumstances.

Normally, if there are any conditions, then it may be hidden. However in the case of date conditions there are some conditions which will definitely not result in it being hidden for anyone.

Parameters

bool $not Set true if we are inverting the condition

Return values

bool	True if condition will return available for everyone

Reimplemented from core_availability\tree_node.

Reimplemented in availability_date\condition.

◆ is_field_condition_met()

static availability_profile\condition::is_field_condition_met	(	$operator,
		$uservalue,
		$value
	)

staticprotected

Returns true if a field meets the required conditions, false otherwise.

Parameters

string	$operator	the requirement/condition
string	$uservalue	the user's value
string	$value	the value required

Return values

boolean True if conditions are met

◆ save()

availability_profile\condition::save ( )

Saves tree data back to a structure object.

Return values

stdClass Structure object (ready to be made into JSON format)

Reimplemented from core_availability\tree_node.

◆ unique_sql_parameter()

static core_availability\tree_node::unique_sql_parameter	(	array &	$params,
			$value
	)

staticprotectedinherited

Utility function for generating SQL parameters (because we can't use ? parameters because get_enrolled_sql has infected us with horrible named parameters).

Parameters

array	$params	Params array (value will be added to this array)
string \| int	$value	Value

Return values

SQL	code for the parameter, e.g. ':pr1234'

◆ update_after_restore()

core_availability\tree_node::update_after_restore	(		$restoreid,
			$courseid,
		base_logger	$logger,
			$name
	)

inherited

Updates this node after restore, returning true if anything changed.

The default behaviour is simply to return false. If there is a problem with the update, $logger can be used to output a warning.

Note: If you need information about the date offset, call core_availability::info::get_restore_date_offset($restoreid). For information on the restoring task and its settings, call core_availability::info::get_restore_task($restoreid).

Parameters

string	$restoreid	Restore ID
int	$courseid	ID of target course
base_logger	$logger	Logger for any warnings
string	$name	Name of this item (for use in warning messages)

Return values

bool	True if there was any change

Reimplemented in availability_date\condition, core_availability\tree, availability_completion\condition, availability_grade\condition, availability_group\condition, and availability_grouping\condition.

◆ update_dependency_id()

core_availability\condition::update_dependency_id	(	$table,
		$oldid,
		$newid
	)

inherited

Updates this node if it contains any references (dependencies) to the given table and id.

Parameters

string	$table	Table name e.g. 'course_modules'
int	$oldid	Previous ID
int	$newid	New ID

Return values

bool	True if it changed, otherwise false

Reimplemented from core_availability\tree_node.

Reimplemented in availability_completion\condition, availability_grade\condition, availability_group\condition, and availability_grouping\condition.

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

availability/condition/profile/classes/condition.php

Public Member Functions

Static Public Member Functions

Public Attributes

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Static Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ __construct()

Member Function Documentation

◆ __toString()

◆ check_available()

◆ completion_value_used()

◆ filter_user_list()

◆ get_cached_user_profile_field()

◆ get_custom_profile_fields()

◆ get_debug_string()

◆ get_description()

◆ get_json()

◆ get_standalone_description()

◆ get_type()

◆ get_user_list_sql()

◆ include_after_restore()

◆ is_applied_to_user_lists()

◆ is_available()

◆ is_available_for_all()

◆ is_field_condition_met()

◆ save()

◆ unique_sql_parameter()

◆ update_after_restore()

◆ update_dependency_id()