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Developer Documentation
- Bug fixes for general core bugs in 3.11.x will end 14 Nov 2022 (12 months plus 6 months extension).
- Bug fixes for security issues in 3.11.x will end 13 Nov 2023 (18 months plus 12 months extension).
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/availability/classes/ -> info.php (source)
Differences Between: [Versions 311 and 400] [Versions 311 and 401] [Versions 311 and 402] [Versions 311 and 403] [Versions 39 and 311]
Base class for conditional availability information (for module or section).
| Copyright: | 2014 The Open University |
| License: | http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later |
| File Size: | 798 lines (32 kb) |
| Included or required: | 0 times |
| Referenced: | 0 times |
| Includes or requires: | 0 files |
Defines 1 class
info:: (22 methods):
__construct()
get_course()
get_modinfo()
get_availability_tree()
decode_availability()
is_available()
is_available_for_all()
get_full_information()
warn_about_invalid_availability()
update_after_restore()
get_restore_date_offset()
get_restore_task()
update_dependency_id_across_course()
update_dependency_id()
convert_legacy_fields()
add_legacy_availability_condition()
add_legacy_availability_field_condition()
add_legacy_condition()
filter_user_list()
get_user_list_sql()
format_info()
completion_value_used()
Base class for conditional availability information (for module or section).
| __construct($course, $visible, $availability) X-Ref |
| Constructs with item details. param: \stdClass $course Course object param: int $visible Value of visible flag (eye icon) param: string $availability Availability definition (JSON format) or null |
| get_course() X-Ref |
| Obtains the course associated with this availability information. return: \stdClass Moodle course object |
| get_modinfo() X-Ref |
| Obtains the modinfo associated with this availability information. Note: This field is available ONLY for use by conditions when calculating availability or information. return: \course_modinfo Modinfo |
| get_availability_tree() X-Ref |
| Gets the availability tree, decoding it if not already done. return: tree Availability tree |
| decode_availability($availability, $lax) X-Ref |
| Decodes availability data from JSON format. This function also validates the retrieved data as follows: 1. Data that does not meet the API-defined structure causes a coding_exception (this should be impossible unless there is a system bug or somebody manually hacks the database). 2. Data that meets the structure but cannot be implemented (e.g. reference to missing plugin or to module that doesn't exist) is either silently discarded (if $lax is true) or causes a coding_exception (if $lax is false). param: string $availability Availability string in JSON format param: boolean $lax If true, throw exceptions only for invalid structure return: tree Availability tree |
| is_available(&$information, $grabthelot = false, $userid = 0,\course_modinfo $modinfo = null) X-Ref |
| 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. Depending on options selected, a description of the restrictions which mean the student can't view it (in HTML format) may be stored in $information. If there is nothing in $information and this function returns false, then the activity should not be displayed at all. This function displays debugging() messages if the availability information is invalid. param: string $information String describing restrictions in HTML format param: bool $grabthelot Performance hint: if true, caches information param: int $userid If set, specifies a different user ID to check availability for param: \course_modinfo $modinfo Usually leave as null for default. Specify when return: bool True if this item is available to the user, false otherwise |
| is_available_for_all() X-Ref |
| Checks whether this activity is going to be available for all users. Normally, if there are any conditions, then it may be hidden depending on the user. However in the case of date conditions there are some conditions which will definitely not result in it being hidden for anyone. return: bool True if activity is available for all |
| get_full_information(\course_modinfo $modinfo = null) X-Ref |
| Obtains a string describing all availability restrictions (even if they do not apply any more). Used to display information for staff editing the website. The modinfo parameter must be specified when it is called from inside get_fast_modinfo, to avoid infinite recursion. This function displays debugging() messages if the availability information is invalid. param: \course_modinfo $modinfo Usually leave as null for default return: string Information string (for admin) about all restrictions on |
| warn_about_invalid_availability(\coding_exception $e) X-Ref |
| In some places we catch coding_exception because if a bug happens, it would be fatal for the course page GUI; instead we just show a developer debug message. param: \coding_exception $e Exception that occurred |
| update_after_restore($restoreid, $courseid, \base_logger $logger,$dateoffset, \base_task $task) X-Ref |
| Called during restore (near end of restore). Updates any necessary ids and writes the updated tree to the database. May output warnings if necessary (e.g. if a course-module cannot be found after restore). param: string $restoreid Restore identifier param: int $courseid Target course id param: \base_logger $logger Logger for any warnings param: int $dateoffset Date offset to be added to any dates (0 = none) param: \base_task $task Restore task |
| get_restore_date_offset($restoreid) X-Ref |
| Gets the date offset (amount by which any date values should be adjusted) for the current restore. param: string $restoreid Restore identifier return: int Date offset (0 if none) |
| get_restore_task($restoreid) X-Ref |
| Gets the restore task (specifically, the task that calls the update_after_restore method) for the current restore. param: string $restoreid Restore identifier return: \base_task Restore task |
| update_dependency_id_across_course($courseorid, $table, $oldid, $newid) X-Ref |
| In rare cases the system may want to change all references to one ID (e.g. one course-module ID) to another one, within a course. This function does that for the conditional availability data for all modules and sections on the course. param: int|\stdClass $courseorid Course id or object param: string $table Table name e.g. 'course_modules' param: int $oldid Previous ID param: int $newid New ID return: bool True if anything changed, otherwise false |
| update_dependency_id($table, $oldid, $newid) X-Ref |
| Called on a single item. If necessary, updates availability data where it has a dependency on an item with a particular id. param: string $table Table name e.g. 'course_modules' param: int $oldid Previous ID param: int $newid New ID return: bool True if it changed, otherwise false |
| convert_legacy_fields($rec, $section, $modgroupmembersonlyignored = false) X-Ref |
| Converts legacy data from fields (if provided) into the new availability syntax. Supported fields: availablefrom, availableuntil, showavailability (and groupingid for sections). It also supports the groupmembersonly field for modules. This part was optional in 2.7 but now always runs (because groupmembersonly has been removed). param: \stdClass $rec Object possibly containing legacy fields param: bool $section True if this is a section param: bool $modgroupmembersonlyignored Ignored option, previously used return: string|null New availability value or null if none |
| add_legacy_availability_condition($availability, $rec, $show) X-Ref |
| Adds a condition from the legacy availability condition. (For use during restore only.) This function assumes that the activity either has no conditions, or that it has an AND tree with one or more conditions. param: string|null $availability Current availability conditions param: \stdClass $rec Object containing information from old table param: bool $show True if 'show' option should be enabled return: string New availability conditions |
| add_legacy_availability_field_condition($availability, $rec, $show) X-Ref |
| Adds a condition from the legacy availability field condition. (For use during restore only.) This function assumes that the activity either has no conditions, or that it has an AND tree with one or more conditions. param: string|null $availability Current availability conditions param: \stdClass $rec Object containing information from old table param: bool $show True if 'show' option should be enabled return: string New availability conditions |
| add_legacy_condition($availability, $condition, $show) X-Ref |
| Adds a condition to an AND group. (For use during restore only.) This function assumes that the activity either has no conditions, or that it has only conditions added by this function. param: string|null $availability Current availability conditions param: string $condition Condition text '{...}' param: bool $show True if 'show' option should be enabled return: string New availability conditions |
| filter_user_list(array $users) X-Ref |
| Tests against a user list. Users who cannot access the activity due to availability restrictions will be removed from the list. Note this only includes availability restrictions (those handled within this API) and not other ways of restricting access. This test ONLY includes conditions which are marked as being applied to user lists. For example, group conditions are included but date conditions are not included. The function operates reasonably efficiently i.e. should not do per-user database queries. It is however likely to be fairly slow. param: array $users Array of userid => object return: array Filtered version of input array |
| get_user_list_sql($onlyactive) X-Ref |
| 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 function returns an array with '' and an empty array, if there are no restrictions on users from these conditions. The SQL will be complex and may be slow. It uses named parameters (sorry, I know they are annoying, but it was unavoidable here). param: bool $onlyactive True if including only active enrolments return: array Array of SQL code (may be empty) and params |
| format_info($inforenderable, $courseorid) X-Ref |
| Formats the $cm->availableinfo string for display. This includes filling in the names of any course-modules that might be mentioned. Should be called immediately prior to display, or at least somewhere that we can guarantee does not happen from within building the modinfo object. param: \renderable|string $inforenderable Info string or renderable param: int|\stdClass $courseorid return: string Correctly formatted info string |
| completion_value_used($course, $cmid) X-Ref |
| No description |
