287 lines
12 KiB
PHP
287 lines
12 KiB
PHP
<?php
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// This file is part of the Studyplan plugin for Moodle
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <https://www.gnu.org/licenses/>.
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/**
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* Privacy information metadata
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* @package local_treestudyplan
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* @copyright 2023 P.M. Kuipers
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* @license https://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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namespace local_treestudyplan\privacy;
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use core_privacy\local\metadata\collection;
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use core_privacy\local\request\userlist;
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use core_privacy\local\request\contextlist;
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use core_privacy\local\request\approved_contextlist;
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use core_privacy\local\request\approved_userlist;
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use core_privacy\local\request\deletion_criteria;
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use core_privacy\local\request\writer;
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use core_privacy\local\request\helper;
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use core_privacy\local\request\transform;
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use tool_dataprivacy\context_instance;
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use context;
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/**
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* Privacy provider
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*/
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class provider implements \core_privacy\local\metadata\provider,
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\core_privacy\local\request\plugin\provider,
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\core_privacy\local\request\core_userlist_provider {
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/**
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* Get the language string identifier with the component's language
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* file to explain why this plugin stores no data.
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*
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* @return string
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*/
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public static function get_reason(): string {
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return 'privacy:metadata';
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}
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/**
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* Get metadata about collected personal data
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* @param collection $collection
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* @return collection
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*/
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public static function get_metadata(collection $collection): collection {
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$collection->add_database_table(
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'local_treestudyplan_invit',
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[
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'user_id' => 'privacy:metadata:invit:user_id',
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'name' => 'privacy:metadata:invit:name',
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'email' => 'privacy:metadata:invit:email',
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'date' => 'privacy:metadata:invit:date',
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],
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'privacy:metadata:invit'
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);
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$collection->add_database_table(
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'local_treestudyplan_user',
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[
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'user_id' => 'privacy:metadata:user:user_id',
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'studyplan_id' => 'privacy:metadata:user:studyplan_id',
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],
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'privacy:metadata:user'
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);
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return $collection;
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}
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/**
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* Get the list of contexts that contain user information for the specified user.
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* @param int $userid The user to search.
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* @return contextlist $contextlist The contextlist containing the list of contexts used in this plugin.
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*/
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public static function get_contexts_for_userid(int $userid) : contextlist {
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$contextlist = new \core_privacy\local\request\contextlist();
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$contextlist->add_system_context(); // For invitations.
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// Add contexts for linked studyplans.
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$sql = "SELECT s.context_id FROM {local_treestudyplan} s
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INNER JOIN {local_treestudyplan_user} a ON a.studyplan_id = s.id
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WHERE ( a.user_id = :userid )
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";
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$contextlist->add_from_sql($sql, ['userid' => $userid]);
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return $contextlist;
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}
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/**
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* Export all user data for the specified user, in the specified contexts.
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* @param approved_contextlist $contextlist The approved contexts to export information for.
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*/
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public static function export_user_data(approved_contextlist $contextlist) {
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global $DB;
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foreach ($contextlist->get_contexts() as $context) {
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$user = $contextlist->get_user();
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if ($context instanceof \context_system) {
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// Export invitations.
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$sql = "SELECT * FROM {local_treestudyplan_invit} i
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WHERE ( aiuser_id = :userid )
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";
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$records = $DB->get_records_sql($sql, ["userid" => $user->id]);
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foreach ($records as $r) {
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static::export_invitation_data_for_user($r);
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}
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// Export empty associations.
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$sql = "SELECT * FROM {local_treestudyplan} s
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INNER JOIN {local_treestudyplan_user} a ON a.studyplan_id = s.id
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WHERE ( a.user_id = :userid AND (s.context_id IS NULL or s.context_id = 0)
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";
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$records = $DB->get_records_sql($sql, ["userid" => $user->id, "contextid" => $context->id]);
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foreach ($records as $r) {
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static::export_studyplan_data_for_user($r);
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}
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} else if ($context->contextlevel == CONTEXT_COURSECAT) {
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// Export studyplan associations.
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$sql = "SELECT * FROM {local_treestudyplan} s
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INNER JOIN {local_treestudyplan_user} a ON a.studyplan_id = s.id
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WHERE ( a.user_id = :userid AND s.context_id = :contextid)";
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$records = $DB->get_records_sql($sql, ["userid" => $user->id, "contextid" => $context->id]);
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foreach ($records as $r) {
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static::export_studyplan_data_for_user($r);
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}
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}
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}
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}
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/**
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* Export the supplied personal data for an invitation.
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* @param stdClass $invit The invitation record.
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*/
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protected static function export_invitation_data_for_user($invit) {
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$context = \context_system::instance();
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$subcontext = ["invitations"];
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writer::with_context($context)
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->export_data($subcontext, (object)["recipient" => $invit->name, "email" => $invit->email]);
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}
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/**
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* Export studyplan data for (current) user
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* @param stdClass $studyplan The studyplan
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*/
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protected static function export_studyplan_data_for_user($studyplan) {
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$context = \context_system::instance();
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$subcontext = ["studyplans"];
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writer::with_context($context)
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->export_data($subcontext, (object)["fullname" => $studyplan->fullname, "shortname" => $studyplan->shortname]);
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}
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/**
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* Delete all data for all users in the specified context.
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* Used when a context is past it's data retention period
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* @param context $context The specific context to delete data for.
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*/
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public static function delete_data_for_all_users_in_context(context $context) {
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global $DB;
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// Find studyplans in context.
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if ($context->contextlevel == CONTEXT_COURSECAT) {
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$sql = "SELECT s.id FROM {local_treestudyplan} WHERE ( a.user_id = :userid AND s.context_id = :contextid)";
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$planids = $DB->get_fieldset_sql($sql, ["contextid" => $context->id]);
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foreach ($planids as $planid) {
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$DB->delete_records("local_treestudyplan_user", ["studyplan_id" => $planid]);
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}
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}
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}
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/**
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* Delete all user data for the specified user, in the specified contexts.
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*
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* @param approved_contextlist $contextlist The approved contexts and user information to delete information for.
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*/
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public static function delete_data_for_user(approved_contextlist $contextlist) {
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global $DB;
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$user = $contextlist->get_user();
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foreach ($contextlist->get_contexts() as $context) {
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if ($context->contextlevel == CONTEXT_SYSTEM) {
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// Delete all associations for this user if the system context is included.
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$DB->delete_records("local_treestudyplan_user", ["user_id" => $user->id]);
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// Also delete all invitations for this user.
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$DB->delete_records("local_treestudyplan_invit", ["user_id" => $user->id]);
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} else if ($context->contextlevel == CONTEXT_COURSECAT) {
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$sql = "SELECT s.id FROM {local_treestudyplan} INNER JOIN {local_treestudyplan_user} a ON a.studyplan_id = s.id
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WHERE ( a.user_id = :userid AND s.context_id = :contextid)";
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$planids = $DB->get_fieldset_sql($sql, ["contextid" => $context->id, "userid" => $user->id]);
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foreach ($planids as $planid) {
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$DB->delete_records("local_treestudyplan_user", ["studyplan_id" => $planid, "user_id" => $user->id]);
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}
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}
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}
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}
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/**
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* Get the list of users who have data within a context.
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* @param userlist $userlist The userlist containing the list of users who have data in this context/plugin combination.
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*/
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public static function get_users_in_context(userlist $userlist) {
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$context = $userlist->get_context();
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if ($context instanceof \context_system) {
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// Add all invitations.
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$sql = "SELECT i.user_id as userid
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FROM {local_treestudyplan_invit} i;";
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$userlist->add_from_sql('userid', $sql, []);
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// Also add "contextless studyplans, they are considered in system context".
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$sql = "SELECT a.user_id as userid FROM {local_treestudyplan_user} a
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INNER JOIN {local_treestudyplan} s ON a.studyplan_id = s.id
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WHERE ( a.context_id is NULL or a.context_id = 0)
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";
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$userlist->add_from_sql('userid', $sql, []);
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}
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// Add the links to all study plans in this context.
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$sql = "SELECT a.user_id as userid FROM {local_treestudyplan_user} a
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INNER JOIN {local_treestudyplan} s ON a.studyplan_id = s.id
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WHERE ( a.context_id = :contextid )
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";
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$userlist->add_from_sql('userid', $sql, ["contextid" => $context->id]);
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}
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/**
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* Delete multiple users within a single context.
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* @param approved_userlist $userlist The approved context and user information to delete information for.
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*/
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public static function delete_data_for_users(approved_userlist $userlist) {
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global $DB;
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$context = $userlist->get_context();
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$users = $userlist->get_userids();
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list($userinsql, $userinparams) = $DB->get_in_or_equal($users, SQL_PARAMS_NAMED, 'user');
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$planids = [];
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if ($context->contextlevel == CONTEXT_SYSTEM) {
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// Determine the relevant plan_ids for this context.
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$sql = "SELECT s.id FROM {local_treestudyplan}
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WHERE ( s.context_id IS NULL OR s.context_id == 0 OR s.context_id = :contextid)) ";
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$planids = $DB->get_fieldset_sql($sql, ["contextid" => $context->id, ]);
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// If plan ids not empty, they will be processed later.
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// Also delete all invitations for these users.
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$sql = "user_id {$userinsql}";
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$DB->delete_records_select("local_treestudyplan_invit", $sql, $userinparams);
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} else if ($context->contextlevel == CONTEXT_COURSECAT) {
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$sql = "SELECT s.id FROM {local_treestudyplan}
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WHERE (s.context_id = :contextid)";
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$planids = $DB->get_fieldset_sql($sql, ["contextid" => $context->id, ]);
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// If plan ids not empty, they will be processed later.
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}
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// Now delete the studyplan associations if relevant.
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if (count($planids) > 0 && count($users) > 0) {
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list($planinsql, $planinputparams) = $DB->get_in_or_equal($planids, SQL_PARAMS_NAMED, 'plan');
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$params = $userinparams + $planinputparams;
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$sql = "user_id {$userinsql} and studyplan_id {$planinsql}";
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$DB->delete_records_select('local_treestudyplan_user', $sql, $params);
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}
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}
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}
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