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/question/engine/ -> questionusage.php (source)
Differences Between: [Versions 310 and 403] [Versions 311 and 403] [Versions 39 and 403] [Versions 400 and 403]
This file defines the question usage class, and a few related classes.
| Copyright: | 2009 The Open University |
| License: | http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later |
| File Size: | 1239 lines (51 kb) |
| Included or required: | 1 time |
| Referenced: | 0 times |
| Includes or requires: | 0 files |
Defines 4 classes
question_usage_by_activity:: (65 methods):
__construct()
set_preferred_behaviour()
get_preferred_behaviour()
get_owning_context()
get_owning_component()
get_id()
set_id_from_database()
get_observer()
set_observer()
add_question()
add_question_in_place_of_other()
next_slot_number()
get_question()
get_slots()
get_first_question_number()
question_count()
get_attempt_iterator()
check_slot()
get_question_attempt()
get_question_state()
get_question_state_string()
get_question_state_class()
can_question_finish_during_attempt()
get_question_action_time()
get_question_fraction()
get_question_mark()
get_question_max_mark()
get_total_mark()
get_summary_information()
get_question_summary()
get_response_summary()
get_right_answer_summary()
get_question_attempt_metadata()
set_question_attempt_metadata()
render_question()
render_question_head_html()
render_question_at_step()
check_file_access()
replace_loaded_question_attempt_info()
get_field_prefix()
get_num_variants()
get_variant()
start_question()
start_all_questions()
start_question_based_on()
process_all_actions()
process_all_autosaves()
get_slots_in_request()
extract_responses()
prepare_simulated_post_data()
process_action()
process_autosave()
validate_sequence_number()
is_autosave_required()
update_question_flags()
get_correct_response()
finish_question()
finish_all_questions()
manual_grade()
validate_can_regrade_with_other_version()
regrade_question()
regrade_all_questions()
set_max_mark()
load_from_records()
preload_all_step_users()
question_attempt_iterator:: (10 methods):
__construct()
current()
key()
next()
rewind()
valid()
offsetExists()
offsetGet()
offsetSet()
offsetUnset()
question_usage_observer:: (9 methods):
notify_modified()
notify_attempt_added()
notify_attempt_modified()
notify_attempt_moved()
notify_step_added()
notify_step_modified()
notify_step_deleted()
notify_metadata_added()
notify_metadata_modified()
question_usage_null_observer:: (9 methods):
notify_modified()
notify_attempt_added()
notify_attempt_modified()
notify_attempt_moved()
notify_step_added()
notify_step_modified()
notify_step_deleted()
notify_metadata_added()
notify_metadata_modified()
Class: question_usage_by_activity - X-Ref
This class keeps track of a group of questions that are being attempted,and which state, and so on, each one is currently in.
A quiz attempt or a lesson attempt could use an instance of this class to
keep track of all the questions in the attempt and process student submissions.
It is basically a collection of {@question_attempt} objects.
The questions being attempted as part of this usage are identified by an integer
that is passed into many of the methods as $slot. ($question->id is not
used so that the same question can be used more than once in an attempt.)
Normally, calling code should be able to do everything it needs to be calling
methods of this class. You should not normally need to get individual
{@question_attempt} objects and play around with their inner workind, in code
that it outside the quetsion engine.
Instances of this class correspond to rows in the question_usages table.
| __construct($component, $context) X-Ref |
| Create a new instance. Normally, calling code should use {@link question_engine::make_questions_usage_by_activity()} or {@link question_engine::load_questions_usage_by_activity()} rather than calling this constructor directly. param: string $component the plugin creating this attempt. For example mod_quiz. param: object $context the context this usage belongs to. |
| set_preferred_behaviour($behaviour) X-Ref |
param: string $behaviour the name of an archetypal behaviour, that should |
| get_preferred_behaviour() X-Ref |
| No description |
| get_owning_context() X-Ref |
| No description |
| get_owning_component() X-Ref |
| No description |
| get_id() X-Ref |
| No description |
| set_id_from_database($id) X-Ref |
| For internal use only. Used by {@link question_engine_data_mapper} to set the id when a usage is saved to the database. param: int $id the newly determined id for this usage. |
| get_observer() X-Ref |
| No description |
| set_observer($observer) X-Ref |
| You should almost certainly not call this method from your code. It is for internal use only. param: question_usage_observer that should be used to tracking changes made to this usage. |
| add_question(question_definition $question, $maxmark = null) X-Ref |
| Add another question to this usage. The added question is not started until you call {@link start_question()} on it. param: question_definition $question the question to add. param: number $maxmark the maximum this question will be marked out of in return: int the number used to identify this question within this usage. |
| add_question_in_place_of_other($slot, question_definition $question, $maxmark = null) X-Ref |
| Add another question to this usage, in the place of an existing slot. The question_attempt that was in that slot is moved to the end at a new slot number, which is returned. The added question is not started until you call {@link start_question()} on it. param: int $slot the slot-number of the question to replace. param: question_definition $question the question to add. param: number $maxmark the maximum this question will be marked out of in return: int the new slot number of the question that was displaced. |
| next_slot_number() X-Ref |
| The slot number that will be allotted to the next question added. |
| get_question($slot, $requirequestioninitialised = true) X-Ref |
| Get the question_definition for a question in this attempt. param: int $slot the number used to identify this question within this usage. param: bool $requirequestioninitialised set this to false if you don't need return: question_definition the requested question object. |
| get_slots() X-Ref |
| No description |
| get_first_question_number() X-Ref |
| No description |
| question_count() X-Ref |
| No description |
| get_attempt_iterator() X-Ref |
| Note the part of the {@link question_usage_by_activity} comment that explains that {@link question_attempt} objects should be considered part of the inner workings of the question engine, and should not, if possible, be accessed directly. return: question_attempt_iterator for iterating over all the questions being |
| check_slot($slot) X-Ref |
| Check whether $number actually corresponds to a question attempt that is part of this usage. Throws an exception if not. param: int $slot a number allegedly identifying a question within this usage. |
| get_question_attempt($slot) X-Ref |
| Note the part of the {@link question_usage_by_activity} comment that explains that {@link question_attempt} objects should be considered part of the inner workings of the question engine, and should not, if possible, be accessed directly. param: int $slot the number used to identify this question within this usage. return: question_attempt the corresponding {@link question_attempt} object. |
| get_question_state($slot) X-Ref |
| Get the current state of the attempt at a question. param: int $slot the number used to identify this question within this usage. return: question_state. |
| get_question_state_string($slot, $showcorrectness) X-Ref |
param: int $slot the number used to identify this question within this usage. param: bool $showcorrectness Whether right/partial/wrong states should return: string A brief textual description of the current state. |
| get_question_state_class($slot, $showcorrectness) X-Ref |
param: int $slot the number used to identify this question within this usage. param: bool $showcorrectness Whether right/partial/wrong states should return: string a CSS class name for the current state. |
| can_question_finish_during_attempt($slot) X-Ref |
| Whether this attempt at a given question could be completed just by the student interacting with the question, before {@link finish_question()} is called. param: int $slot the number used to identify this question within this usage. return: boolean whether the attempt at the given question can finish naturally. |
| get_question_action_time($slot) X-Ref |
| Get the time of the most recent action performed on a question. param: int $slot the number used to identify this question within this usage. return: int timestamp. |
| get_question_fraction($slot) X-Ref |
| Get the current fraction awarded for the attempt at a question. param: int $slot the number used to identify this question within this usage. return: number|null The current fraction for this question, or null if one has |
| get_question_mark($slot) X-Ref |
| Get the current mark awarded for the attempt at a question. param: int $slot the number used to identify this question within this usage. return: number|null The current mark for this question, or null if one has |
| get_question_max_mark($slot) X-Ref |
| Get the maximum mark possible for the attempt at a question. param: int $slot the number used to identify this question within this usage. return: number the available marks for this question. |
| get_total_mark() X-Ref |
| Get the total mark for all questions in this usage. return: number The sum of marks of all the question_attempts in this usage. |
| get_summary_information(question_display_options $options) X-Ref |
| Get summary information about this usage. Some behaviours may be able to provide interesting summary information about the attempt as a whole, and this method provides access to that data. To see how this works, try setting a quiz to one of the CBM behaviours, and then look at the extra information displayed at the top of the quiz review page once you have sumitted an attempt. In the return value, the array keys are identifiers of the form qbehaviour_behaviourname_meaningfullkey. For qbehaviour_deferredcbm_highsummary. The values are arrays with two items, title and content. Each of these will be either a string, or a renderable. param: question_display_options $options display options to apply. return: array as described above. |
| get_question_summary($slot) X-Ref |
| Get a simple textual summary of the question that was asked. param: int $slot the slot number of the question to summarise. return: string the question summary. |
| get_response_summary($slot) X-Ref |
| Get a simple textual summary of response given. param: int $slot the slot number of the question to get the response summary for. return: string the response summary. |
| get_right_answer_summary($slot) X-Ref |
| Get a simple textual summary of the correct response to a question. param: int $slot the slot number of the question to get the right answer summary for. return: string the right answer summary. |
| get_question_attempt_metadata($slot, $name) X-Ref |
| Return one of the bits of metadata for a particular question attempt in this usage. param: int $slot the slot number of the question of inereest. param: string $name the name of the metadata variable to return. return: string the value of that metadata variable. |
| set_question_attempt_metadata($slot, $name, $value) X-Ref |
| Set some metadata for a particular question attempt in this usage. param: int $slot the slot number of the question of inerest. param: string $name the name of the metadata variable to return. param: string $value the value to set that metadata variable to. |
| render_question($slot, $options, $number = null) X-Ref |
| Get the {@link core_question_renderer}, in collaboration with appropriate {@link qbehaviour_renderer} and {@link qtype_renderer} subclasses, to generate the HTML to display this question. param: int $slot the number used to identify this question within this usage. param: question_display_options $options controls how the question is rendered. param: string|null $number The question number to display. 'i' is a special return: string HTML fragment representing the question. |
| render_question_head_html($slot) X-Ref |
| Generate any bits of HTML that needs to go in the <head> tag when this question is displayed in the body. param: int $slot the number used to identify this question within this usage. return: string HTML fragment. |
| render_question_at_step($slot, $seq, $options, $number = null) X-Ref |
| Like {@link render_question()} but displays the question at the past step indicated by $seq, rather than showing the latest step. param: int $slot the number used to identify this question within this usage. param: int $seq the seq number of the past state to display. param: question_display_options $options controls how the question is rendered. param: string|null $number The question number to display. 'i' is a special return: string HTML fragment representing the question. |
| check_file_access($slot, $options, $component, $filearea,$args, $forcedownload) X-Ref |
| Checks whether the users is allow to be served a particular file. param: int $slot the number used to identify this question within this usage. param: question_display_options $options the options that control display of the question. param: string $component the name of the component we are serving files for. param: string $filearea the name of the file area. param: array $args the remaining bits of the file path. param: bool $forcedownload whether the user must be forced to download the file. return: bool true if the user can access this file. |
| replace_loaded_question_attempt_info($slot, $qa) X-Ref |
| Replace a particular question_attempt with a different one. For internal use only. Used when reloading the state of a question from the database. param: int $slot the slot number of the question to replace. param: question_attempt $qa the question attempt to put in that place. |
| get_field_prefix($slot) X-Ref |
| You should probably not use this method in code outside the question engine. The main reason for exposing it was for the benefit of unit tests. param: int $slot the number used to identify this question within this usage. return: string return the prefix that is pre-pended to field names in the HTML |
| get_num_variants($slot) X-Ref |
| Get the number of variants available for the question in this slot. param: int $slot the number used to identify this question within this usage. return: int the number of variants available. |
| get_variant($slot) X-Ref |
| Get the variant of the question being used in a given slot. param: int $slot the number used to identify this question within this usage. return: int the variant of this question that is being used. |
| start_question($slot, $variant = null, $timenow = null) X-Ref |
| Start the attempt at a question that has been added to this usage. param: int $slot the number used to identify this question within this usage. param: int $variant which variant of the question to use. Must be between param: int|null $timenow optional, the timstamp to record for this action. Defaults to now. |
| start_all_questions(question_variant_selection_strategy $variantstrategy = null,$timestamp = null, $userid = null) X-Ref |
| Start the attempt at all questions that has been added to this usage. param: question_variant_selection_strategy how to pick which variant of each question to use. param: int $timestamp optional, the timstamp to record for this action. Defaults to now. param: int $userid optional, the user to attribute this action to. Defaults to the current user. |
| start_question_based_on($slot, question_attempt $oldqa) X-Ref |
| Start the attempt at a question, starting from the point where the previous question_attempt $oldqa had reached. This is used by the quiz 'Each attempt builds on last' mode. param: int $slot the number used to identify this question within this usage. param: question_attempt $oldqa a previous attempt at this quetsion that |
| process_all_actions($timestamp = null, $postdata = null) X-Ref |
| Process all the question actions in the current request. If there is a parameter slots included in the post data, then only those question numbers will be processed, otherwise all questions in this useage will be. This function also does {@link update_question_flags()}. param: int $timestamp optional, use this timestamp as 'now'. param: array $postdata optional, only intended for testing. Use this data |
| process_all_autosaves($timestamp = null, $postdata = null) X-Ref |
| Process all the question autosave data in the current request. If there is a parameter slots included in the post data, then only those question numbers will be processed, otherwise all questions in this useage will be. This function also does {@link update_question_flags()}. param: int $timestamp optional, use this timestamp as 'now'. param: array $postdata optional, only intended for testing. Use this data |
| get_slots_in_request($postdata = null) X-Ref |
| Get the list of slot numbers that should be processed as part of processing the current request. param: array $postdata optional, only intended for testing. Use this data return: array of slot numbers. |
| extract_responses($slot, $postdata = null) X-Ref |
| Get the submitted data from the current request that belongs to this particular question. param: int $slot the number used to identify this question within this usage. param: array|null $postdata optional, only intended for testing. Use this data return: array submitted data specific to this question. |
| prepare_simulated_post_data($simulatedresponses) X-Ref |
| Transform an array of response data for slots to an array of post data as you would get from quiz attempt form. param: $simulatedresponses array keys are slot nos => contains arrays representing student return: array simulated post data |
| process_action($slot, $submitteddata, $timestamp = null) X-Ref |
| Process a specific action on a specific question. param: int $slot the number used to identify this question within this usage. param: array $submitteddata the submitted data that constitutes the action. param: int|null $timestamp (optional) the timestamp to consider 'now'. |
| process_autosave($slot, $submitteddata, $timestamp = null) X-Ref |
| Process an autosave action on a specific question. param: int $slot the number used to identify this question within this usage. param: array $submitteddata the submitted data that constitutes the action. param: int|null $timestamp (optional) the timestamp to consider 'now'. |
| validate_sequence_number($slot, $postdata = null) X-Ref |
| Check that the sequence number, that detects weird things like the student clicking back, is OK. If the sequence check variable is not present, returns false. If the check variable is present and correct, returns true. If the variable is present and wrong, throws an exception. param: int $slot the number used to identify this question within this usage. param: array|null $postdata (optional) data to use in place of $_POST. return: bool true if the check variable is present and correct. False if it |
| is_autosave_required($slot, $postdata = null) X-Ref |
| Check, based on the sequence number, whether this auto-save is still required. param: int $slot the number used to identify this question within this usage. param: array|null $postdata the submitted data that constitutes the action. return: bool true if the check variable is present and correct, otherwise false. |
| update_question_flags($postdata = null) X-Ref |
| Update the flagged state for all question_attempts in this usage, if their flagged state was changed in the request. param: array|null $postdata optional, only intended for testing. Use this data |
| get_correct_response($slot) X-Ref |
| Get the correct response to a particular question. Passing the results of this method to {@link process_action()} will probably result in full marks. If it is not possible to compute a correct response, this method should return null. param: int $slot the number used to identify this question within this usage. return: array that constitutes a correct response to this question. |
| finish_question($slot, $timestamp = null) X-Ref |
| Finish the active phase of an attempt at a question. This is an external act of finishing the attempt. Think, for example, of the 'Submit all and finish' button in the quiz. Some behaviours, (for example, immediatefeedback) give a way of finishing the active phase of a question attempt as part of a {@link process_action()} call. After the active phase is over, the only changes possible are things like manual grading, or changing the flag state. param: int $slot the number used to identify this question within this usage. param: int|null $timestamp (optional) the timestamp to consider 'now'. |
| finish_all_questions($timestamp = null) X-Ref |
| Finish the active phase of an attempt at a question. See {@link finish_question()} for a fuller description of what 'finish' means. param: int|null $timestamp (optional) the timestamp to consider 'now'. |
| manual_grade($slot, $comment, $mark, $commentformat = null) X-Ref |
| Perform a manual grading action on a question attempt. param: int $slot the number used to identify this question within this usage. param: string $comment the comment being added to the question attempt. param: number $mark the mark that is being assigned. Can be null to just param: int $commentformat one of the FORMAT_... constants. The format of $comment. |
| validate_can_regrade_with_other_version(int $slot, question_definition $otherversion) X-Ref |
| Verify if the question_attempt in the given slot can be regraded with that other question version. param: int $slot the number used to identify this question within this usage. param: question_definition $otherversion a different version of the question to use in the regrade. return: string|null null if the regrade can proceed, else a reason why not. |
| regrade_question($slot, $finished = false, $newmaxmark = null,question_definition $otherversion = null) X-Ref |
| Regrade a question in this usage. This replays the sequence of submitted actions to recompute the outcomes. param: int $slot the number used to identify this question within this usage. param: bool $finished whether the question attempt should be forced to be finished param: number $newmaxmark (optional) if given, will change the max mark while regrading. param: question_definition|null $otherversion a different version of the question to use |
| regrade_all_questions($finished = false) X-Ref |
| Regrade all the questions in this usage (without changing their max mark). param: bool $finished whether each question should be forced to be finished |
| set_max_mark($slot, $maxmark) X-Ref |
| Change the max mark for this question_attempt. param: int $slot the slot number of the question of inerest. param: float $maxmark the new max mark. |
| load_from_records($records, $qubaid) X-Ref |
| Create a question_usage_by_activity from records loaded from the database. For internal use only. param: Iterator $records Raw records loaded from the database. param: int $qubaid The id of the question usage we are loading. return: question_usage_by_activity The newly constructed usage. |
| preload_all_step_users() X-Ref |
| Preload users of all question attempt steps. |
Class: question_attempt_iterator - X-Ref
A class abstracting access to the {@link question_usage_by_activity::$questionattempts} array.This class snapshots the list of {@link question_attempts} to iterate over
when it is created. If a question is added to the usage mid-iteration, it
will now show up.
To create an instance of this class, use
{@link question_usage_by_activity::get_attempt_iterator()}
| __construct(question_usage_by_activity $quba) X-Ref |
| To create an instance of this class, use {@link question_usage_by_activity::get_attempt_iterator()}. param: question_usage_by_activity $quba the usage to iterate over. |
| current() X-Ref |
| Standard part of the Iterator interface. return: question_attempt |
| key() X-Ref |
| Standard part of the Iterator interface. return: int |
| next() X-Ref |
| Standard part of the Iterator interface. |
| rewind() X-Ref |
| Standard part of the Iterator interface. |
| valid() X-Ref |
| Standard part of the Iterator interface. return: bool |
| offsetExists($slot) X-Ref |
| Standard part of the ArrayAccess interface. param: int $slot return: bool |
| offsetGet($slot) X-Ref |
| Standard part of the ArrayAccess interface. param: int $slot return: question_attempt |
| offsetSet($slot, $value) X-Ref |
| Standard part of the ArrayAccess interface. param: int $slot param: question_attempt $value |
| offsetUnset($slot) X-Ref |
| Standard part of the ArrayAccess interface. param: int $slot |
Interface: question_usage_observer - X-Ref
Interface for things that want to be notified of signficant changes to a{@link question_usage_by_activity}.
A question behaviour controls the flow of actions a student can
take as they work through a question, and later, as a teacher manually grades it.
| notify_modified() X-Ref |
| No description |
| notify_attempt_added(question_attempt $qa) X-Ref |
| Called when a new question attempt is added to this usage. param: question_attempt $qa the newly added question attempt. |
| notify_attempt_modified(question_attempt $qa) X-Ref |
| Called when the fields of a question attempt in this usage are modified. param: question_attempt $qa the newly added question attempt. |
| notify_attempt_moved(question_attempt $qa, $oldslot) X-Ref |
| Called when a question_attempt has been moved to a new slot. param: question_attempt $qa The question attempt that was moved. param: int $oldslot The previous slot number of that attempt. |
| notify_step_added(question_attempt_step $step, question_attempt $qa, $seq) X-Ref |
| Called when a new step is added to a question attempt in this usage. param: question_attempt_step $step the new step. param: question_attempt $qa the usage it is being added to. param: int $seq the sequence number of the new step. |
| notify_step_modified(question_attempt_step $step, question_attempt $qa, $seq) X-Ref |
| Called when a new step is updated in a question attempt in this usage. param: question_attempt_step $step the step that was updated. param: question_attempt $qa the usage it is being added to. param: int $seq the sequence number of the new step. |
| notify_step_deleted(question_attempt_step $step, question_attempt $qa) X-Ref |
| Called when a new step is updated in a question attempt in this usage. param: question_attempt_step $step the step to delete. param: question_attempt $qa the usage it is being added to. |
| notify_metadata_added(question_attempt $qa, $name) X-Ref |
| Called when a new metadata variable is set on a question attempt in this usage. param: question_attempt $qa the question attempt the metadata is being added to. param: int $name the name of the metadata variable added. |
| notify_metadata_modified(question_attempt $qa, $name) X-Ref |
| Called when a metadata variable on a question attempt in this usage is updated. param: question_attempt $qa the question attempt where the metadata is being modified. param: int $name the name of the metadata variable modified. |
Class: question_usage_null_observer - X-Ref
Null implmentation of the {@link question_usage_watcher} interface.Does nothing.
| notify_modified() X-Ref |
| No description |
| notify_attempt_added(question_attempt $qa) X-Ref |
| No description |
| notify_attempt_modified(question_attempt $qa) X-Ref |
| No description |
| notify_attempt_moved(question_attempt $qa, $oldslot) X-Ref |
| No description |
| notify_step_added(question_attempt_step $step, question_attempt $qa, $seq) X-Ref |
| No description |
| notify_step_modified(question_attempt_step $step, question_attempt $qa, $seq) X-Ref |
| No description |
| notify_step_deleted(question_attempt_step $step, question_attempt $qa) X-Ref |
| No description |
| notify_metadata_added(question_attempt $qa, $name) X-Ref |
| No description |
| notify_metadata_modified(question_attempt $qa, $name) X-Ref |
| No description |
