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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Contains the class used for the displaying the expired contexts table.
*
* @package tool_dataprivacy
* @copyright 2018 Jun Pataleta <jun@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace tool_dataprivacy\output;
defined('MOODLE_INTERNAL') || die();
require_once($CFG->libdir . '/tablelib.php');
use coding_exception;
use context_helper;
use dml_exception;
use Exception;
use html_writer;
use pix_icon;
use stdClass;
use table_sql;
use tool_dataprivacy\api;
use tool_dataprivacy\expired_context;
use tool_dataprivacy\external\purpose_exporter;
use tool_dataprivacy\purpose;
defined('MOODLE_INTERNAL') || die;
/**
* The class for displaying the expired contexts table.
*
* @copyright 2018 Jun Pataleta <jun@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class expired_contexts_table extends table_sql {
/** @var int The context level acting as a filter for this table. */
protected $contextlevel = null;
/**
* @var bool $selectall Has the user selected all users on the page? True by default.
*/
protected $selectall = true;
/** @var purpose[] Array of purposes by their id. */
protected $purposes = [];
/** @var purpose[] Map of context => purpose. */
protected $purposemap = [];
/** @var array List of roles. */
protected $roles = [];
/**
* expired_contexts_table constructor.
*
* @param int|null $contextlevel
* @throws coding_exception
*/
public function __construct($contextlevel = null) {
parent::__construct('expired-contexts-table');
$this->contextlevel = $contextlevel;
$columnheaders = [
'name' => get_string('name'),
'info' => get_string('info'),
'purpose' => get_string('purpose', 'tool_dataprivacy'),
'category' => get_string('category', 'tool_dataprivacy'),
'retentionperiod' => get_string('retentionperiod', 'tool_dataprivacy'),
'tobedeleted' => get_string('tobedeleted', 'tool_dataprivacy'),
'timecreated' => get_string('expiry', 'tool_dataprivacy'),
];
$checkboxattrs = [
'title' => get_string('selectall'),
'data-action' => 'selectall'
];
$columnheaders['select'] = html_writer::checkbox('selectall', 1, true, null, $checkboxattrs);
$this->define_columns(array_keys($columnheaders));
$this->define_headers(array_values($columnheaders));
$this->no_sorting('name');
$this->no_sorting('select');
$this->no_sorting('info');
$this->no_sorting('purpose');
$this->no_sorting('category');
$this->no_sorting('retentionperiod');
$this->no_sorting('tobedeleted');
// Make this table sorted by first name by default.
$this->sortable(true, 'timecreated');
// We use roles in several places.
$this->roles = role_get_names();
}
/**
* The context name column.
*
* @param stdClass $expiredctx The row data.
* @return string
* @throws coding_exception
*/
public function col_name($expiredctx) {
global $OUTPUT;
$context = context_helper::instance_by_id($expiredctx->get('contextid'));
$parent = $context->get_parent_context();
$contextdata = (object)[
'name' => $context->get_context_name(false, true),
'parent' => $parent->get_context_name(false, true),
];
$fullcontexts = $context->get_parent_contexts(true);
$contextsinpath = [];
foreach ($fullcontexts as $contextinpath) {
$contextsinpath[] = $contextinpath->get_context_name(false, true);
}
$infoicon = new pix_icon('i/info', implode(' / ', array_reverse($contextsinpath)));
$infoiconhtml = $OUTPUT->render($infoicon);
$name = html_writer::span(get_string('nameandparent', 'tool_dataprivacy', $contextdata), 'mr-1');
return $name . $infoiconhtml;
}
/**
* The context information column.
*
* @param stdClass $expiredctx The row data.
* @return string
* @throws coding_exception
*/
public function col_info($expiredctx) {
global $OUTPUT;
$context = context_helper::instance_by_id($expiredctx->get('contextid'));
$children = $context->get_child_contexts();
if (empty($children)) {
return get_string('none');
} else {
$childnames = [];
foreach ($children as $child) {
$childnames[] = $child->get_context_name(false, true);
}
$infoicon = new pix_icon('i/info', implode(', ', $childnames));
$infoiconhtml = $OUTPUT->render($infoicon);
$name = html_writer::span(get_string('nchildren', 'tool_dataprivacy', count($children)), 'mr-1');
return $name . $infoiconhtml;
}
}
/**
* The category name column.
*
* @param stdClass $expiredctx The row data.
* @return mixed
* @throws coding_exception
* @throws dml_exception
*/
public function col_category($expiredctx) {
$context = context_helper::instance_by_id($expiredctx->get('contextid'));
$category = api::get_effective_context_category($context);
return s($category->get('name'));
}
/**
* The purpose column.
*
* @param stdClass $expiredctx The row data.
* @return string
* @throws coding_exception
*/
public function col_purpose($expiredctx) {
$purpose = $this->get_purpose_for_expiry($expiredctx);
return s($purpose->get('name'));
}
/**
* The retention period column.
*
* @param stdClass $expiredctx The row data.
* @return string
*/
public function col_retentionperiod($expiredctx) {
$purpose = $this->get_purpose_for_expiry($expiredctx);
$expiries = [];
$expiry = html_writer::tag('dt', get_string('default'), ['class' => 'col-sm-3']);
if ($expiredctx->get('defaultexpired')) {
$expiries[get_string('default')] = get_string('expiredrolewithretention', 'tool_dataprivacy', (object) [
'retention' => api::format_retention_period(new \DateInterval($purpose->get('retentionperiod'))),
]);
} else {
$expiries[get_string('default')] = get_string('unexpiredrolewithretention', 'tool_dataprivacy', (object) [
'retention' => api::format_retention_period(new \DateInterval($purpose->get('retentionperiod'))),
]);
}
if (!$expiredctx->is_fully_expired()) {
$purposeoverrides = $purpose->get_purpose_overrides();
foreach ($expiredctx->get('unexpiredroles') as $roleid) {
$role = $this->roles[$roleid];
$override = $purposeoverrides[$roleid];
$expiries[$role->localname] = get_string('unexpiredrolewithretention', 'tool_dataprivacy', (object) [
'retention' => api::format_retention_period(new \DateInterval($override->get('retentionperiod'))),
]);
}
foreach ($expiredctx->get('expiredroles') as $roleid) {
$role = $this->roles[$roleid];
$override = $purposeoverrides[$roleid];
$expiries[$role->localname] = get_string('expiredrolewithretention', 'tool_dataprivacy', (object) [
'retention' => api::format_retention_period(new \DateInterval($override->get('retentionperiod'))),
]);
}
}
$output = array_map(function($rolename, $expiry) {
$return = html_writer::tag('dt', $rolename, ['class' => 'col-sm-3']);
$return .= html_writer::tag('dd', $expiry, ['class' => 'col-sm-9']);
return $return;
}, array_keys($expiries), $expiries);
return html_writer::tag('dl', implode($output), ['class' => 'row']);
}
/**
* The timecreated a.k.a. the context expiry date column.
*
* @param stdClass $expiredctx The row data.
* @return string
*/
public function col_timecreated($expiredctx) {
return userdate($expiredctx->get('timecreated'));
}
/**
* Generate the select column.
*
* @param stdClass $expiredctx The row data.
* @return string
*/
public function col_select($expiredctx) {
$id = $expiredctx->get('id');
return html_writer::checkbox('expiredcontext_' . $id, $id, $this->selectall, '', ['class' => 'selectcontext']);
}
/**
* Formatting for the 'tobedeleted' column which indicates in a friendlier fashion whose data will be removed.
*
* @param stdClass $expiredctx The row data.
* @return string
*/
public function col_tobedeleted($expiredctx) {
if ($expiredctx->is_fully_expired()) {
return get_string('defaultexpired', 'tool_dataprivacy');
}
$purpose = $this->get_purpose_for_expiry($expiredctx);
$a = (object) [];
$expiredroles = [];
foreach ($expiredctx->get('expiredroles') as $roleid) {
$expiredroles[] = html_writer::tag('li', $this->roles[$roleid]->localname);
}
$a->expired = html_writer::tag('ul', implode($expiredroles));
$unexpiredroles = [];
foreach ($expiredctx->get('unexpiredroles') as $roleid) {
$unexpiredroles[] = html_writer::tag('li', $this->roles[$roleid]->localname);
}
$a->unexpired = html_writer::tag('ul', implode($unexpiredroles));
if ($expiredctx->get('defaultexpired')) {
return get_string('defaultexpiredexcept', 'tool_dataprivacy', $a);
} else if (empty($unexpiredroles)) {
return get_string('defaultunexpired', 'tool_dataprivacy', $a);
} else {
return get_string('defaultunexpiredwithexceptions', 'tool_dataprivacy', $a);
}
}
/**
* Query the database for results to display in the table.
*
* @param int $pagesize size of page for paginated displayed table.
* @param bool $useinitialsbar do you want to use the initials bar.
* @throws dml_exception
* @throws coding_exception
*/
public function query_db($pagesize, $useinitialsbar = true) {
// Only count expired contexts that are awaiting confirmation.
$total = expired_context::get_record_count_by_contextlevel($this->contextlevel, expired_context::STATUS_EXPIRED);
$this->pagesize($pagesize, $total);
$sort = $this->get_sql_sort();
if (empty($sort)) {
$sort = 'timecreated';
}
// Only load expired contexts that are awaiting confirmation.
$expiredcontexts = expired_context::get_records_by_contextlevel($this->contextlevel, expired_context::STATUS_EXPIRED,
$sort, $this->get_page_start(), $this->get_page_size());
$this->rawdata = [];
$contextids = [];
foreach ($expiredcontexts as $persistent) {
$this->rawdata[] = $persistent;
$contextids[] = $persistent->get('contextid');
}
$this->preload_contexts($contextids);
// Set initial bars.
if ($useinitialsbar) {
$this->initialbars($total > $pagesize);
}
}
/**
* Override default implementation to display a more meaningful information to the user.
*/
public function print_nothing_to_display() {
global $OUTPUT;
echo $this->render_reset_button();
$this->print_initials_bar();
echo $OUTPUT->notification(get_string('noexpiredcontexts', 'tool_dataprivacy'), 'warning');
}
/**
* Override the table's show_hide_link method to prevent the show/hide link for the select column from rendering.
*
* @param string $column the column name, index into various names.
* @param int $index numerical index of the column.
* @return string HTML fragment.
*/
protected function show_hide_link($column, $index) {
if ($index < 6) {
return parent::show_hide_link($column, $index);
}
return '';
}
/**
* Get the purpose for the specified expired context.
*
* @param expired_context $expiredcontext
* @return purpose
*/
protected function get_purpose_for_expiry(expired_context $expiredcontext) : purpose {
$context = context_helper::instance_by_id($expiredcontext->get('contextid'));
if (empty($this->purposemap[$context->id])) {
$purpose = api::get_effective_context_purpose($context);
$this->purposemap[$context->id] = $purpose->get('id');
if (empty($this->purposes[$purpose->get('id')])) {
$this->purposes[$purpose->get('id')] = $purpose;
}
}
return $this->purposes[$this->purposemap[$context->id]];
}
/**
* Preload context records given a set of contextids.
*
* @param array $contextids
*/
protected function preload_contexts(array $contextids) {
global $DB;
if (empty($contextids)) {
return;
}
$ctxfields = \context_helper::get_preload_record_columns_sql('ctx');
list($insql, $inparams) = $DB->get_in_or_equal($contextids, SQL_PARAMS_NAMED);
$sql = "SELECT {$ctxfields} FROM {context} ctx WHERE ctx.id {$insql}";
$contextlist = $DB->get_recordset_sql($sql, $inparams);
foreach ($contextlist as $contextdata) {
\context_helper::preload_from_record($contextdata);
}
$contextlist->close();
}
}