<?php

/**
 * ---------------------------------------------------------------------
 *
 * GLPI - Gestionnaire Libre de Parc Informatique
 *
 * http://glpi-project.org
 *
 * @copyright 2015-2023 Teclib' and contributors.
 * @copyright 2003-2014 by the INDEPNET Development Team.
 * @licence   https://www.gnu.org/licenses/gpl-3.0.html
 *
 * ---------------------------------------------------------------------
 *
 * LICENSE
 *
 * This file is part of GLPI.
 *
 * This program 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.
 *
 * This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 * ---------------------------------------------------------------------
 */

use Glpi\CalDAV\Contracts\CalDAVCompatibleItemInterface;
use Glpi\CalDAV\Traits\VobjectConverterTrait;
use Glpi\RichText\RichText;
use Sabre\VObject\Component\VCalendar;
use Sabre\VObject\Component\VTodo;

class PlanningExternalEvent extends CommonDBTM implements CalDAVCompatibleItemInterface
{
    use Glpi\Features\PlanningEvent {
        rawSearchOptions as protected trait_rawSearchOptions;
    }
    use VobjectConverterTrait;

    public $dohistory = true;
    public static $rightname = 'externalevent';

    const MANAGE_BG_EVENTS =   1024;

    public static function getTypeName($nb = 0)
    {
        return _n('External event', 'External events', $nb);
    }

    public function defineTabs($options = [])
    {
        $ong = [];
        $this->addDefaultFormTab($ong);
        $this->addStandardTab('Document_Item', $ong, $options);
        $this->addStandardTab('Log', $ong, $options);

        return $ong;
    }

    public static function canUpdate()
    {
       // we permits globally to update this object,
       // as users can update their onw items
        return Session::haveRightsOr(self::$rightname, [
            CREATE,
            UPDATE,
            self::MANAGE_BG_EVENTS
        ]);
    }

    public function canUpdateItem()
    {
        if (!$this->canUpdateBGEvents()) {
            return false;
        }

       // the current user can update only this own events without UPDATE right
       // but not bg one, see above
        if (
            $this->fields['users_id'] != Session::getLoginUserID()
            && !Session::haveRight(self::$rightname, UPDATE)
        ) {
            return false;
        }

        return parent::canUpdateItem();
    }


    public function canPurgeItem()
    {
        if (!$this->canUpdateBGEvents()) {
            return false;
        }

       // the current user can update only this own events without PURGE right
       // but not bg one, see above
        if (
            $this->fields['users_id'] != Session::getLoginUserID()
            && !Session::haveRight(self::$rightname, PURGE)
        ) {
            return false;
        }

        return parent::canPurgeItem();
    }

    /**
     * do we have the right to manage background events
     *
     * @return bool
     */
    public function canUpdateBGEvents()
    {
        if (
            $this->fields["background"]
            && !Session::haveRight(self::$rightname, self::MANAGE_BG_EVENTS)
        ) {
            return false;
        }

        return true;
    }


    public function post_getFromDB()
    {
        $this->fields['users_id_guests'] = importArrayFromDB($this->fields['users_id_guests']);
    }


    public function showForm($ID, array $options = [])
    {
        global $CFG_GLPI;

        $canedit    = $this->can($ID, UPDATE);
        $rand       = mt_rand();
        $rand_plan  = mt_rand();
        $rand_rrule = mt_rand();

        if (
            ($options['from_planning_ajax'] ?? false)
            || ($options['from_planning_edit_ajax'] ?? false)
        ) {
            $options['no_header'] = true;
        }
        $this->initForm($ID, $options);
        $this->showFormHeader($options);

        $is_ajax  = isset($options['from_planning_edit_ajax']) && $options['from_planning_edit_ajax'];
        $is_rrule = strlen($this->fields['rrule']) > 0;

       // set event for another user
        if (
            isset($options['res_itemtype'])
            && isset($options['res_items_id'])
            && strtolower($options['res_itemtype']) == "user"
        ) {
            $this->fields['users_id'] =  $options['res_items_id'];
        }

        if ($canedit) {
            $tpl_class = 'PlanningExternalEventTemplate';
            echo "<tr class='tab_bg_1' style='vertical-align: top'>";
            echo "<td colspan='2'>" . $tpl_class::getTypeName() . "</td>";
            echo "<td colspan='2'>";
            $tpl_class::dropdown([
                'value'     => $this->fields['planningexternaleventtemplates_id'],
                'entity'    => $this->getEntityID(),
                'rand'      => $rand,
                'on_change' => "template_update$rand(this.value)"
            ]);

            $ajax_url = $CFG_GLPI["root_doc"] . "/ajax/planning.php";
            $JS = <<<JAVASCRIPT
            function template_update{$rand}(value) {
               $.ajax({
                  url: '{$ajax_url}',
                  type: "POST",
                  data: {
                     action: 'get_externalevent_template',
                     planningexternaleventtemplates_id: value
                  }
               }).done(function(data) {
                  // set common fields
                  if (data.name.length > 0) {
                     $("#textfield_name{$rand}").val(data.name);
                  }
                  $("#dropdown_state{$rand}").trigger("setValue", data.state);
                  if (data.planningeventcategories_id > 0) {
                     $("#dropdown_planningeventcategories_id{$rand}")
                        .trigger("setValue", data.planningeventcategories_id);
                  }
                  $("#dropdown_background{$rand}").trigger("setValue", data.background);
                  if (data.text.length > 0) {
                     setRichTextEditorContent("text{$rand}", data.text);
                  }

                  // set planification fields
                  if (data.duration > 0) {
                     $("#dropdown_plan__duration_{$rand_plan}").trigger("setValue", data.duration);
                  }
                  $("#dropdown__planningrecall_before_time_{$rand_plan}")
                     .trigger("setValue", data.before_time);

                  // set rrule fields
                  if (data.rrule != null
                      && data.rrule.freq != null ) {
                     $("#dropdown_rrule_freq_{$rand_rrule}").trigger("setValue", data.rrule.freq);
                     $("#dropdown_rrule_interval_{$rand_rrule}").trigger("setValue", data.rrule.interval);
                     $("#showdate{$rand_rrule}").val(data.rrule.until);
                     $("#dropdown_rrule_byday_{$rand_rrule}").val(data.rrule.byday).trigger('change');
                     $("#dropdown_rrule_bymonth_{$rand_rrule}").val(data.rrule.bymonth).trigger('change');
                  }
               });
            }
JAVASCRIPT;
            echo Html::scriptBlock($JS);
            echo "</tr>";
        }

        echo "<tr class='tab_bg_2'><td colspan='2'>" . __('Title') . "</td>";
        echo "<td colspan='2'>";
        if (isset($options['start'])) {
            echo Html::hidden('day', ['value' => $options['start']]);
        }
        if ($canedit) {
            echo Html::input(
                'name',
                [
                    'value' => $this->fields['name'],
                    'id'    => "textfield_name$rand",
                ]
            );
        } else {
            echo $this->fields['name'];
        }
        if (isset($options['from_planning_edit_ajax']) && $options['from_planning_edit_ajax']) {
            echo Html::hidden('from_planning_edit_ajax');
        }
        echo "</td>";
        echo "</tr>";

        echo "<tr class='tab_bg_2'><td colspan='2'>" . User::getTypeName(1) . "</td>";
        echo "<td colspan='2'>";
        User::dropdown([
            'name'          => 'users_id',
            'right'         => 'all',
            'value'         => $this->fields['users_id']
        ]);
        echo "</td>";
        echo "</tr>";

        echo "<tr class='tab_bg_2'><td colspan='2'>" . __('Guests') . "</td>";
        echo "<td colspan='2'>";
        User::dropdown([
            'name'          => 'users_id_guests[]',
            'right'         => 'all',
            'value'         => $this->fields['users_id_guests'],
            'multiple'      => true,
        ]);
        echo "<div style='font-style: italic'>" .
            __("Each guest will have a read-only copy of this event") .
            "</div>";
        echo "</td>";
        echo "</tr>";

        echo "<tr class='tab_bg_2'>";
        echo "<td colspan='2'>" . __('Status') . "</td>";
        echo "<td colspan='2'>";
        if ($canedit) {
            Planning::dropdownState("state", $this->fields["state"], true, [
                'rand' => $rand,
            ]);
        } else {
            echo Planning::getState($this->fields["state"]);
        }
        echo "</td>";
        echo "</tr>";

        echo "<tr class='tab_bg_2'>";
        echo "<tr class='tab_bg_2'>";
        echo "<td colspan='2'>" . _n('Category', 'Categories', 1) . "</td>";
        echo "<td colspan='2'>";
        if ($canedit) {
            PlanningEventCategory::dropdown([
                'value' => $this->fields['planningeventcategories_id'],
                'rand'  => $rand
            ]);
        } else {
            echo Dropdown::getDropdownName(
                PlanningEventCategory::getTable(),
                $this->fields['planningeventcategories_id']
            );
        }
        echo "</td>";
        echo "</tr>";

        echo "<tr class='tab_bg_2'>";
        echo "<td colspan='2'>" . __('Background event') . "</td>";
        echo "<td colspan='2'>";
        if ($canedit) {
            Dropdown::showYesNo('background', $this->fields['background'], -1, [
                'rand' => $rand,
            ]);
        } else {
            echo Dropdown::getYesNo($this->fields['background']);
        }
        echo "</td>";
        echo "</tr>";

        echo "<tr class='tab_bg_2'><td  colspan='2'>" . _n('Calendar', 'Calendars', 1) . "</td>";
        echo "<td>";
        Planning::showAddEventClassicForm([
            'items_id'  => $this->fields['id'],
            'itemtype'  => $this->getType(),
            'begin'     => $this->fields['begin'],
            'end'       => $this->fields['end'],
            'rand_user' => $this->fields['users_id'],
            'rand'      => $rand_plan,
        ]);
        echo "</td></tr>";

        echo "<tr class='tab_bg_2'><td  colspan='2'>" . __('Repeat') . "</td>";
        echo "<td>";
        echo self::showRepetitionForm($this->fields['rrule'] ?? '', [
            'rand' => $rand_rrule
        ]);
        echo "</td></tr>";

        echo "<tr class='tab_bg_2'><td>" . __('Description') . "</td>" .
           "<td colspan='3'>";

        if ($canedit) {
            Html::textarea([
                'name'              => 'text',
                'value'             => RichText::getSafeHtml($this->fields["text"], true),
                'enable_richtext'   => true,
                'enable_fileupload' => true,
                'rand'              => $rand,
                'editor_id'         => 'text' . $rand,
            ]);
        } else {
            echo "<div class='rich_text_container'>";
            echo RichText::getEnhancedHtml($this->fields["text"]);
            echo "</div>";
        }

        echo "</td></tr>";

        if ($is_ajax && $is_rrule) {
            $options['candel'] = false;
            if ($this->can($ID, PURGE)) {
                $options['addbuttons'] = [
                    'purge'          => [
                        'text' => __("Delete serie"),
                        'icon' => 'fas fa-trash-alt',
                    ],
                    'purge_instance' => [
                        'text' => __("Delete instance"),
                        'icon' => 'far fa-trash-alt',
                    ],
                ];
            }
        }

        $this->showFormButtons($options);

        return true;
    }

    public function getRights($interface = 'central')
    {
        $values = parent::getRights();

        $values[self::MANAGE_BG_EVENTS] = __('manage background events');

        return $values;
    }

    public static function getGroupItemsAsVCalendars($groups_id)
    {

        return self::getItemsAsVCalendars([self::getTableField('groups_id') => $groups_id]);
    }

    public static function getUserItemsAsVCalendars($users_id)
    {

        return self::getItemsAsVCalendars([
            'OR' => [
                self::getTableField('users_id')        => $users_id,
                self::getTableField('users_id_guests') => ['LIKE', '%"' . $users_id . '"%'],
            ]
        ]);
    }

    /**
     * Returns items as VCalendar objects.
     *
     * @param array $criteria
     *
     * @return \Sabre\VObject\Component\VCalendar[]
     */
    private static function getItemsAsVCalendars(array $criteria)
    {

        global $DB;

        $query = [
            'FROM'  => self::getTable(),
            'WHERE' => $criteria,
        ];

        $event_iterator = $DB->request($query);

        $vcalendars = [];
        foreach ($event_iterator as $event) {
            $item = new self();
            $item->getFromResultSet($event);
            $vcalendar = $item->getAsVCalendar();
            if (null !== $vcalendar) {
                $vcalendars[] = $vcalendar;
            }
        }

        return $vcalendars;
    }

    public function getAsVCalendar()
    {

        if (!$this->canViewItem()) {
            return null;
        }

        $is_task = in_array($this->fields['state'], [Planning::DONE, Planning::TODO]);
        $is_planned = !empty($this->fields['begin']) && !empty($this->fields['end']);
        $target_component = $this->getTargetCaldavComponent($is_planned, $is_task);
        if (null === $target_component) {
            return null;
        }

        $vcalendar = $this->getVCalendarForItem($this, $target_component);

        return $vcalendar;
    }

    public function getInputFromVCalendar(VCalendar $vcalendar)
    {

        $vcomp = $vcalendar->getBaseComponent();

        $input = $this->getCommonInputFromVcomponent($vcomp, $this->isNewItem());

        $input['text'] = $input['content'];
        unset($input['content']);

        if ($vcomp instanceof VTodo && !array_key_exists('state', $input)) {
           // Force default state to TO DO or event will be considered as VEVENT
            $input['state'] = \Planning::TODO;
        }

        return $input;
    }


    public function rawSearchOptions()
    {
        return $this->trait_rawSearchOptions();
    }


    public static function getVisibilityCriteria(): array
    {
        if (Session::haveRight(Planning::$rightname, Planning::READALL)) {
            return [];
        }

        $condition = [
            'OR' => [
                self::getTableField('users_id') => $_SESSION['glpiID'],
                self::getTableField('users_id_guests') => ['LIKE', '%"' . $_SESSION['glpiID'] . '"%'],
            ]
        ];

        if (Session::haveRight(Planning::$rightname, Planning::READGROUP)) {
            $groups = $_SESSION['glpigroups'];
            if (count($groups)) {
                $users = Group_User::getGroupUsers($groups);
                $users_id = [];
                foreach ($users as $data) {
                    $users_id[] = $data['id'];
                }
                $condition['OR'][self::getTableField('users_id')] = $users_id;
            }
        }

        return $condition;
    }


    public static function addVisibilityRestrict()
    {
        $criteria = self::getVisibilityCriteria();
        if (!count($criteria)) {
            return;
        }
        $criteria['FROM'] = self::getTable();

        $it = new \DBmysqlIterator(null);
        $it->buildQuery($criteria);
        $sql = $it->getSql();
        $sql = preg_replace('/.*WHERE /', '', $sql);

        return $sql;
    }
}