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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/>.

/**
 * override permissions table.
 *
 * @package    core_role
 * @copyright  1999 onwards Martin Dougiamas (http://dougiamas.com)
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die();

class core_role_override_permissions_table_advanced extends core_role_capability_table_with_risks {
    protected $strnotset;
    protected $haslockedcapabilities = false;

/**
     * Constructor.
     *
     * This method loads loads all the information about the current state of
     * the overrides, then updates that based on any submitted data. It also
     * works out which capabilities should be locked for this user.
     *
     * @param object $context the context this table relates to.
     * @param integer $roleid the role being overridden.
     * @param boolean $safeoverridesonly If true, the user is only allowed to override
     *      capabilities with no risks.
     */
    public function __construct($context, $roleid, $safeoverridesonly) {
        parent::__construct($context, 'overriderolestable', $roleid);
        $this->displaypermissions = $this->allpermissions;
        $this->strnotset = get_string('notset', 'core_role');

// Determine which capabilities should be locked.
        if ($safeoverridesonly) {
            foreach ($this->capabilities as $capid => $cap) {
                if (!is_safe_capability($cap)) {
                    $this->capabilities[$capid]->locked = true;
                    $this->haslockedcapabilities = true;
                }
            }
        }
    }

/**
     * This method adds an additional class to a row if capability is other than inherited.
     *
     * @param stdClass $capability
     * @return array
     */
    protected function get_row_attributes($capability) {
        $rowattributes = parent::get_row_attributes($capability);
        if ($this->permissions[$capability->name] !== 0) {
            if (empty($rowattributes['class'])) {
                $rowattributes['class'] = "overriddenpermission";
            } else {
                $rowattributes['class'] .= " overriddenpermission";
            }
        }
        return $rowattributes;
    }

protected function load_parent_permissions() {
        // Get the capabilities from the parent context, so that can be shown in the interface.
        $parentcontext = $this->context->get_parent_context();
        $this->parentpermissions = role_context_capabilities($this->roleid, $parentcontext);
    }

public function has_locked_capabilities() {
        return $this->haslockedcapabilities;
    }

protected function add_permission_cells($capability) {
        $disabled = '';
        if ($capability->locked || $this->parentpermissions[$capability->name] == CAP_PROHIBIT) {
            $disabled = ' disabled="disabled"';
        }

// One cell for each possible permission.
        $content = '';
        foreach ($this->displaypermissions as $perm => $permname) {
            $strperm = $this->strperms[$permname];
            $extraclass = '';
            if ($perm != CAP_INHERIT && $perm == $this->parentpermissions[$capability->name]) {
                $extraclass = ' capcurrent';
            }
            $checked = '';
            if ($this->permissions[$capability->name] == $perm) {
                $checked = 'checked="checked" ';
            }
            $content .= '<td class="' . $permname . $extraclass . '">';
            $content .= '<label><input type="radio" name="' . $capability->name .
                '" value="' . $perm . '" ' . $checked . $disabled . '/> ';
            if ($perm == CAP_INHERIT) {
                $inherited = $this->parentpermissions[$capability->name];
                if ($inherited == CAP_INHERIT) {
                    $inherited = $this->strnotset;
                } else {
                    $inherited = $this->strperms[$this->allpermissions[$inherited]];
                }
                $strperm .= ' (' . $inherited . ')';
            }
            $content .= '<span class="note">' . $strperm . '</span>';
            $content .= '</label></td>';
        }
        return $content;
    }
}