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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 401 and 402] [Versions 401 and 403]

Classes to enforce the various access rules that can apply to a quiz.

Copyright: 2009 Tim Hunt
License: http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
File Size: 562 lines (20 kb)
Included or required:0 times
Referenced: 0 times
Includes or requires: 0 files

Defines 1 class


Class: quiz_access_manager  - X-Ref

This class keeps track of the various access rules that apply to a particular
quiz, with convinient methods for seeing whether access is allowed.

__construct($quizobj, $timenow, $canignoretimelimits)   X-Ref
Create an instance for a particular quiz.

param: object $quizobj An instance of the class quiz from attemptlib.php.
param: int $timenow The time to use as 'now'.
param: bool $canignoretimelimits Whether this user is exempt from time

make_rules($quizobj, $timenow, $canignoretimelimits)   X-Ref
Make all the rules relevant to a particular quiz.

param: quiz $quizobj information about the quiz in question.
param: int $timenow the time that should be considered as 'now'.
param: bool $canignoretimelimits whether the current user is exempt from
return: array of {@link quiz_access_rule_base}s.

get_rule_classes()   X-Ref

return: array of all the installed rule class names.

add_settings_form_fields(mod_quiz_mod_form $quizform, MoodleQuickForm $mform)   X-Ref
Add any form fields that the access rules require to the settings form.

Note that the standard plugins do not use this mechanism, becuase all their
settings are stored in the quiz table.

param: mod_quiz_mod_form $quizform the quiz settings form that is being built.
param: MoodleQuickForm $mform the wrapped MoodleQuickForm.

get_browser_security_choices()   X-Ref
The the options for the Browser security settings menu.

return: array key => lang string.

validate_settings_form_fields(array $errors,array $data, $files, mod_quiz_mod_form $quizform)   X-Ref
Validate the data from any form fields added using {@link add_settings_form_fields()}.

param: array $errors the errors found so far.
param: array $data the submitted form data.
param: array $files information about any uploaded files.
param: mod_quiz_mod_form $quizform the quiz form object.
return: array $errors the updated $errors array.

save_settings($quiz)   X-Ref
Save any submitted settings when the quiz settings form is submitted.

Note that the standard plugins do not use this mechanism because their
settings are stored in the quiz table.

param: object $quiz the data from the quiz form, including $quiz->id

delete_settings($quiz)   X-Ref
Delete any rule-specific settings when the quiz is deleted.

Note that the standard plugins do not use this mechanism because their
settings are stored in the quiz table.

param: object $quiz the data from the database, including $quiz->id

get_load_sql($quizid, $rules, $basefields)   X-Ref
Build the SQL for loading all the access settings in one go.

param: int $quizid the quiz id.
param: string $basefields initial part of the select list.
return: array with two elements, the sql and the placeholder values.

load_settings($quizid)   X-Ref
Load any settings required by the access rules. We try to do this with
a single DB query.

Note that the standard plugins do not use this mechanism, becuase all their
settings are stored in the quiz table.

param: int $quizid the quiz id.
return: array setting value name => value. The value names should all

load_quiz_and_settings($quizid)   X-Ref
Load the quiz settings and any settings required by the access rules.
We try to do this with a single DB query.

Note that the standard plugins do not use this mechanism, becuase all their
settings are stored in the quiz table.

param: int $quizid the quiz id.
return: object mdl_quiz row with extra fields.

get_active_rule_names()   X-Ref

return: array the class names of all the active rules. Mainly useful for

accumulate_messages($messages, $new)   X-Ref
Accumulates an array of messages.

param: array $messages the current list of messages.
param: string|array $new the new messages or messages.
return: array the updated array of messages.

describe_rules()   X-Ref
Provide a description of the rules that apply to this quiz, such
as is shown at the top of the quiz view page. Note that not all
rules consider themselves important enough to output a description.

return: array an array of description messages which may be empty. It

prevent_new_attempt($numprevattempts, $lastattempt)   X-Ref
Whether or not a user should be allowed to start a new attempt at this quiz now.
If there are any restrictions in force now, return an array of reasons why access
should be blocked. If access is OK, return false.

param: int $numattempts the number of previous attempts this user has made.
param: object|false $lastattempt information about the user's last completed attempt.
return: mixed An array of reason why access is not allowed, or an empty array

prevent_access()   X-Ref
Whether the user should be blocked from starting a new attempt or continuing
an attempt now. If there are any restrictions in force now, return an array
of reasons why access should be blocked. If access is OK, return false.

return: mixed An array of reason why access is not allowed, or an empty array

is_preflight_check_required($attemptid)   X-Ref

param: int|null $attemptid the id of the current attempt, if there is one,
return: bool whether a check is required before the user starts/continues

get_preflight_check_form(moodle_url $url, $attemptid)   X-Ref
Build the form required to do the pre-flight checks.

param: moodle_url $url the form action URL.
param: int|null $attemptid the id of the current attempt, if there is one,
return: mod_quiz_preflight_check_form the form.

notify_preflight_check_passed($attemptid)   X-Ref
The pre-flight check has passed. This is a chance to record that fact in
some way.

param: int|null $attemptid the id of the current attempt, if there is one,

current_attempt_finished()   X-Ref
Inform the rules that the current attempt is finished. This is use, for example
by the password rule, to clear the flag in the session.


is_finished($numprevattempts, $lastattempt)   X-Ref
Do any of the rules mean that this student will no be allowed any further attempts at this
quiz. Used, for example, to change the label by the grade displayed on the view page from
'your current grade is' to 'your final grade is'.

param: int $numattempts the number of previous attempts this user has made.
param: object $lastattempt information about the user's last completed attempt.
return: bool true if there is no way the user will ever be allowed to attempt

setup_attempt_page($page)   X-Ref
Sets up the attempt (review or summary) page with any properties required
by the access rules.

param: moodle_page $page the page object to initialise.

get_end_time($attempt)   X-Ref
Compute when the attempt must be submitted.

param: object $attempt the data from the relevant quiz_attempts row.
return: int|false the attempt close time.

get_time_left_display($attempt, $timenow)   X-Ref
Compute what should be displayed to the user for time remaining in this attempt.

param: object $attempt the data from the relevant quiz_attempts row.
param: int $timenow the time to consider as 'now'.
return: int|false the number of seconds remaining for this attempt.

attempt_must_be_in_popup()   X-Ref

return: bolean if this quiz should only be shown to students in a popup window.

get_popup_options()   X-Ref

return: array any options that are required for showing the attempt page

back_to_view_page($output, $message = '')   X-Ref
Send the user back to the quiz view page. Normally this is just a redirect, but
If we were in a secure window, we close this window, and reload the view window we came from.

This method does not return;

param: mod_quiz_renderer $output the quiz renderer.
param: string $message optional message to output while redirecting.

make_review_link($attempt, $reviewoptions, $output)   X-Ref
Make some text into a link to review the quiz, if that is appropriate.

param: string $linktext some text.
param: object $attempt the attempt object
return: string some HTML, the $linktext either unmodified or wrapped in a

validate_preflight_check($data, $files, $attemptid)   X-Ref
Run the preflight checks using the given data in all the rules supporting them.

param: array $data passed data for validation
param: array $files un-used, Moodle seems to not support it anymore
param: int|null $attemptid the id of the current attempt, if there is one,
return: array of errors, empty array means no erros