<?php

/*
 * e107 website system
 *
 * Copyright (C) 2008-2016 e107 Inc (e107.org)
 * Released under the terms and conditions of the
 * GNU General Public License (http://www.gnu.org/licenses/gpl.txt)
 *
 * TimeKeeper admin area.
 *
 * Changes from the current repo version:
 *  - the "Pending" screen pointed at a table called `Pending` (it doesn't
 *    exist: the table is timekeeperPending) and its fields were copied from
 *    the Questions screen, so none matched; now uses the real table/columns
 *  - new "Preferences" page with a `stats_key` setting. This is the shared
 *    secret that tk_stats_page.php and timekeeper.php?mode=short check
 *    (?key=...), so it can be set from the admin area instead of a script
 *  - pluginName is the plugin folder name in lower case ('timekeeper'); the
 *    prefs are stored/read under that name (getPlugPref('timekeeper', ...))
 *  - "Spelling Score" page (customPage): user and subject are escaped when
 *    printed and in SQL, `e107.e107_tkReport` -> #tkReport, the three nested
 *    query loops are one GROUP BY query per user, and "next word" no longer
 *    prints blanks (or warns) when every word already has a usage
 *  - removed the leftover rss_url*() methods copied from the RSS plugin
 *  - new "Student Limits" screen: edit each student's row in the `timekeeper` table
 *    (play window, free minutes, questions needed, daily maximum) and add a student,
 *    instead of editing the table in phpMyAdmin
 */


require_once("../../class2.php");
if (!getperms("P") || !e107::isInstalled('timekeeper')) {
    e107::redirect('admin');
    exit;
}

// Maybe later i'll setup languages
//e107::includeLan(e_PLUGIN."timekeeper/languages/".e_LANGUAGE."_admin_timekeeper_menu.php");


class timekeeper_admin extends e_admin_dispatcher {

    protected $modes = array(
        'main' => array(
            'controller' => 'plugin_tk_admin_ui',
            'path' => null,
            'ui' => 'plugin_tk_admin_form_ui',
            'uipath' => null
        ),
        'score' => array(
            'controller' => 'tk_Score_ui',
            'path' => null,
            'ui' => 'tk_Score_form_ui',
            'uipath' => null
        ),
        'pending' => array(
            'controller' => 'tk_Pending_ui',
            'path' => null,
            'ui' => 'tk_Pending_form_ui',
            'uipath' => null
        ),
        'report' => array(
            'controller' => 'tk_Report_ui',
            'path' => null,
            'ui' => 'tk_Report_form_ui',
            'uipath' => null
        ),
        'reportold' => array(
            'controller' => 'tk_Reportold_ui',
            'path' => null,
            'ui' => 'tk_Reportold_form_ui',
            'uipath' => null
        ),
        'wordlist' => array(
            'controller' => 'tk_Wordlist_ui',
            'path' => null,
            'ui' => 'tk_Wordlist_form_ui',
            'uipath' => null
        ),
        'geography' => array(
            'controller' => 'tk_geography_ui',
            'path' => null,
            'ui' => 'tk_geography_form_ui',
            'uipath' => null
        ),
        'students' => array(
            'controller' => 'tk_Students_ui',
            'path' => null,
            'ui' => 'tk_Students_form_ui',
            'uipath' => null
        ),
    );
    protected $adminMenu = array(
        'main/list' => array('caption' => 'List Questions', 'perm' => '0'),
        'main/create' => array('caption' => LAN_CREATE, 'perm' => '0'),
        'main/prefs' => array('caption' => LAN_PREFS, 'perm' => '0'),
        'Students/custom' => array('caption' => 'Student Limits', 'perm' => '0'),
        'other0' => array('divider' => true),
        //'subjects/list'		=> array('caption'=> 'List Subjects', 'perm' => '0'),
        //'subjects/create'	=> array('caption'=> 'Add Subjects', 'perm' => '0'),
        //'other1' 		=> array('divider' => true),
        'Score/list' => array('caption' => 'List Score', 'perm' => '0'),
        'other2' => array('divider' => true),
        'Pending/list' => array('caption' => 'List Pending', 'perm' => '0'),
        'other3' => array('divider' => true),
        'Report/list' => array('caption' => 'List Report', 'perm' => '0'),
        'Reportold/list' => array('caption' => 'List Report (Old)', 'perm' => '0'),
        'other4' => array('divider' => true),
        'Wordlist/list' => array('caption' => 'Spelling Words', 'perm' => '0'),
        'Wordlist/create' => array('caption' => 'Add Words', 'perm' => '0'),
        'Wordlist/custom' => array('caption' => 'Spelling Score', 'perm' => '0'),
        'other5' => array('divider' => true),
        'Geography/list' => array('caption' => 'Geography', 'perm' => '0'),
    );
    protected $adminMenuAliases = array(
        'main/edit' => 'main/list'
    );
    protected $menuTitle = 'TimeKeeper';

}

/*
  =========================================================================
  =====	Questions table interface (and plugin preferences)
  =========================================================================
 */

class plugin_tk_admin_ui extends e_admin_ui {

    protected $pluginTitle = 'TimeKeeper';
    protected $pluginName = 'timekeeper';
    protected $table = 'timekeeperQuestions';
    protected $pid = 'timekeeper_id';
    protected $perPage = 10;
    protected $fields = array(
        'checkboxes' => array('title' => '', 'type' => null, 'data' => false, 'width' => '5%', 'thclass' => 'center', 'forced' => '1', 'class' => 'center', 'toggle' => 'e-multiselect',),
        'timekeeper_id' => array('title' => LAN_ID, 'data' => 'int', 'width' => '5%', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_questiondescription' => array('title' => LAN_TITLE, 'type' => 'text', 'data' => 'str', 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_question' => array('title' => "Question", 'type' => 'text', 'data' => 'str', 'readonly' => 1, 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_answers' => array('title' => "Answers", 'type' => 'text', 'data' => 'str', 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_subject' => array('title' => "Subject", 'type' => 'text', 'data' => 'str', 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_addeddatestamp' => array('title' => LAN_DATESTAMP, 'type' => 'datestamp', 'data' => 'int', 'readonly' => true, 'width' => 'auto', 'filter' => true, 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_yearlevel' => array('title' => "Year Level", 'type' => 'dropdown', 'data' => 'int', 'inline' => true, 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => array('optArray' => array(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)), 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_correctanswer' => array('title' => "Correct Answer", 'type' => 'number', 'data' => 'int', 'inline' => true, 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'options' => array('title' => LAN_OPTIONS, 'type' => null, 'data' => '', 'width' => '10%', 'thclass' => 'center last', 'class' => 'center last', 'forced' => '1',),
    );
    protected $fieldpref = array('checkboxes', 'timekeeper_questiondescription', 'timekeeper_question', 'timekeeper_answers', 'timekeeper_correctanswer', 'timekeeper_yearlevel', 'options');

    // Plugin preferences (Preferences page). Read elsewhere with
    // e107::getPlugPref('timekeeper', 'stats_key', '').
    protected $prefs = array(
        'stats_key' => array(
            'title' => 'Stats / summary key',
            'type' => 'text',
            'data' => 'str',
            'help' => 'Shared secret for tk_stats_page.php and timekeeper.php?mode=short: add &key=<this value> to the URL. Leave empty for no key (tk_stats_page.php is then open to anyone).',
            'writeParms' => array('size' => 'xxlarge'),
        ),
    );

}

class plugin_tk_admin_form_ui extends e_admin_form_ui {
    
}

/*
  =========================================================================
  =====	Score table interface
  =========================================================================
 */

class tk_Score_ui extends e_admin_ui {

    protected $pluginTitle = 'TimeKeeper';
    protected $pluginName = 'timekeeper';
    protected $table = 'timekeeperScore';
    protected $pid = 'timekeeper_id';
    protected $perPage = 10;
    protected $fields = array(
        'checkboxes' => array('title' => '', 'type' => null, 'data' => false, 'width' => '5%', 'thclass' => 'center', 'forced' => '1', 'class' => 'center', 'toggle' => 'e-multiselect',),
        'timekeeper_id' => array('title' => LAN_ID, 'data' => 'int', 'width' => '5%', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_username' => array('title' => "User Name", 'type' => 'text', 'data' => 'str', 'readonly' => 1, 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_lifetimequestions' => array('title' => "life time Question", 'type' => 'text', 'data' => 'str', 'readonly' => 1, 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_lifetimecorrect' => array('title' => "life time correct", 'type' => 'text', 'data' => 'str', 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_minutes' => array('title' => "minutes", 'type' => 'text', 'data' => 'str', 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_lastquestiondatestamp' => array('title' => LAN_DATESTAMP, 'type' => 'datestamp', 'data' => 'int', 'readonly' => true, 'width' => 'auto', 'filter' => true, 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_yearlevel' => array('title' => "Year Level", 'type' => 'dropdown', 'data' => 'int', 'inline' => true, 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => array('optArray' => array(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)), 'class' => 'left', 'thclass' => 'left',),
        'options' => array('title' => LAN_OPTIONS, 'type' => null, 'data' => '', 'width' => '10%', 'thclass' => 'center last', 'class' => 'center last', 'forced' => '1',),
    );
    protected $fieldpref = array('checkboxes', 'timekeeper_username', 'timekeeper_lifetimequestions', 'timekeeper_lifetimecorrect', 'timekeeper_minutes', 'options');

}

class tk_Score_form_ui extends e_admin_form_ui {

}

/*
  =========================================================================
  =====	Pending table interface
  =========================================================================
 */

class tk_Pending_ui extends e_admin_ui {

    protected $pluginTitle = 'TimeKeeper';
    protected $pluginName = 'timekeeper';
    protected $table = 'timekeeperPending';
    protected $pid = 'timekeeper_id';
    protected $perPage = 10;
    protected $fields = array(
        'checkboxes' => array('title' => '', 'type' => null, 'data' => false, 'width' => '5%', 'thclass' => 'center', 'forced' => '1', 'class' => 'center', 'toggle' => 'e-multiselect',),
        'timekeeper_id' => array('title' => LAN_ID, 'data' => 'int', 'width' => '5%', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_username' => array('title' => "User Name", 'type' => 'text', 'data' => 'str', 'readonly' => 1, 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_question' => array('title' => "Question", 'type' => 'number', 'data' => 'int', 'readonly' => 1, 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_answereddatestamp' => array('title' => LAN_DATESTAMP, 'type' => 'datestamp', 'data' => 'int', 'readonly' => true, 'width' => 'auto', 'filter' => true, 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_answer' => array('title' => "Answer", 'type' => 'textarea', 'data' => 'str', 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'options' => array('title' => LAN_OPTIONS, 'type' => null, 'data' => '', 'width' => '10%', 'thclass' => 'center last', 'class' => 'center last', 'forced' => '1',),
    );
    protected $fieldpref = array('checkboxes', 'timekeeper_username', 'timekeeper_question', 'timekeeper_answereddatestamp', 'timekeeper_answer', 'options');

}

class tk_Pending_form_ui extends e_admin_form_ui {

}

/*
  =========================================================================
  =====	Report table interface
  =========================================================================
 */

class tk_Report_ui extends e_admin_ui {

    protected $pluginTitle = 'TimeKeeper';
    protected $pluginName = 'timekeeper';
    protected $table = 'tkReport';
    protected $pid = 'id';
    protected $perPage = 10;
    protected $fields = array(
        'checkboxes' => array('title' => '', 'type' => null, 'data' => false, 'width' => '5%', 'thclass' => 'center', 'forced' => '1', 'class' => 'center', 'toggle' => 'e-multiselect',),
        'id' => array('title' => LAN_ID, 'data' => 'int', 'width' => '5%', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'username' => array('title' => "User Name", 'type' => 'text', 'data' => 'str', 'readonly' => 1, 'width' => 'auto', 'filter' => true, 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'question' => array('title' => "Question", 'type' => 'text', 'data' => 'str', 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'userAnswer' => array('title' => "User Answer", 'type' => 'text', 'data' => 'str', 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'answer' => array('title' => "Correct Answer", 'type' => 'text', 'data' => 'str', 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'subject' => array('title' => "Subject", 'type' => 'text', 'data' => 'str', 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'answereddatestamp' => array('title' => LAN_DATESTAMP, 'type' => 'datestamp', 'data' => 'int', 'readonly' => true, 'width' => 'auto', 'filter' => true, 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'correct' => array('title' => "Correct", 'type' => 'bool', 'data' => 'int', 'inline' => true, 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'options' => array('title' => LAN_OPTIONS, 'type' => null, 'data' => '', 'width' => '10%', 'thclass' => 'center last', 'class' => 'center last', 'forced' => '1',),
    );
    protected $fieldpref = array('checkboxes', 'username', 'question', 'userAnswer', 'answer', 'options');

}

class tk_Report_form_ui extends e_admin_form_ui {

}

class tk_Reportold_ui extends e_admin_ui {

    protected $pluginTitle = 'TimeKeeper';
    protected $pluginName = 'timekeeper';
    protected $table = 'timekeeperReport';
    protected $pid = 'timekeeper_id';
    protected $perPage = 10;
    protected $fields = array(
        'checkboxes' => array('title' => '', 'type' => null, 'data' => false, 'width' => '5%', 'thclass' => 'center', 'forced' => '1', 'class' => 'center', 'toggle' => 'e-multiselect',),
        'timekeeper_id' => array('title' => LAN_ID, 'data' => 'int', 'width' => '5%', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_username' => array('title' => "User Name", 'type' => 'text', 'data' => 'str', 'readonly' => 1, 'width' => 'auto', 'filter' => true, 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_question' => array('title' => "Question", 'type' => 'text', 'data' => 'str', 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_userAnswer' => array('title' => "User Answer", 'type' => 'text', 'data' => 'str', 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_answer' => array('title' => "Correct Answer", 'type' => 'text', 'data' => 'str', 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_subject' => array('title' => "Subject", 'type' => 'text', 'data' => 'str', 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_answereddatestamp' => array('title' => LAN_DATESTAMP, 'type' => 'datestamp', 'data' => 'int', 'readonly' => true, 'width' => 'auto', 'filter' => true, 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_yearLevel' => array('title' => "Year Level", 'type' => 'number', 'data' => 'int', 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'timekeeper_correct' => array('title' => "Correct", 'type' => 'bool', 'data' => 'int', 'inline' => true, 'width' => 'auto', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'options' => array('title' => LAN_OPTIONS, 'type' => null, 'data' => '', 'width' => '10%', 'thclass' => 'center last', 'class' => 'center last', 'forced' => '1',),
    );
    protected $fieldpref = array('checkboxes', 'timekeeper_username', 'timekeeper_question', 'timekeeper_userAnswer', 'timekeeper_answer', 'timekeeper_yearLevel', 'options');

}

class tk_Reportold_form_ui extends e_admin_form_ui {

}

/*
  =========================================================================
  =====	Wordlist table interface
  =========================================================================
 */

class tk_Wordlist_ui extends e_admin_ui {

    protected $pluginTitle = 'TimeKeeper';
    protected $pluginName = 'timekeeper';
    protected $table = 'tk_wordList';
    protected $pid = 'indexNo';
    protected $perPage = 10;
    protected $fields = array(
        'checkboxes' => array('title' => '', 'type' => null, 'data' => false, 'width' => '5%', 'thclass' => 'center', 'forced' => '1', 'class' => 'center', 'toggle' => 'e-multiselect',),
        'indexNo' => array('title' => LAN_ID, 'data' => 'int', 'width' => '5%', 'readonly' => 1, 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'word' => array('title' => "Word", 'type' => 'text', 'data' => 'str', 'readonly' => 1, 'width' => '10%', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'usage' => array('title' => "Word Usage", 'type' => 'textarea', 'data' => 'str', 'width' => '65%', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'year' => array('title' => "Year Level", 'type' => 'number', 'data' => 'int', 'width' => '5%', 'help' => '', 'readParms' => '', 'writeParms' => ['default' => 1, 'min' => 1, 'max' => 13], 'class' => 'left', 'thclass' => 'left',),
        'options' => array('title' => LAN_OPTIONS, 'type' => null, 'data' => '', 'width' => '10%', 'thclass' => 'center last', 'class' => 'center last', 'forced' => '1',),
    );
    protected $fieldpref = array('checkboxes', 'indexNo', 'word', 'usage', 'year', 'options');

    private function esc($value) {
        return htmlspecialchars((string) $value, ENT_QUOTES, 'UTF-8');
    }

    /**
     * "Spelling Score" page: last month's score per user and subject, a
     * difficulty figure per user, and how many words still need a usage.
     */
    public function customPage() {

        $sql = e107::getDb();

        $text = '<table style="width:600px;"><tr><td style="width:25%;">User</td><td style="width:25%;">Subject</td><td style="width:24%;">Percentage</td><td style="width:25%;">Questions last month</td></tr>';

        $users = [];
        $sql->gen("SELECT DISTINCT username FROM `#tkReport` WHERE `answereddatestamp` > UNIX_TIMESTAMP(NOW() - INTERVAL 1 MONTH)");
        while ($row = $sql->fetch()) {
            $users[] = $row['username'];
        }

        foreach ($users as $user) {
            $u = $sql->escape($user);

            // Score per subject, last month.
            $sql->gen("SELECT `subject`, CAST((SUM(correct) / COUNT(id) * 100) AS DECIMAL(5,2)) AS percent, COUNT(id) AS `count`
                FROM `#tkReport`
                WHERE `answereddatestamp` > UNIX_TIMESTAMP(NOW() - INTERVAL 1 MONTH) AND `username` = '{$u}'
                GROUP BY `subject` ORDER BY `subject`");
            while ($row = $sql->fetch()) {
                $text .= '<tr><td>' . $this->esc($user) . '</td><td>' . $this->esc($row['subject']) . '</td><td>' . $this->esc($row['percent']) . '</td><td>' . (int) $row['count'] . '</td></tr>';
            }

            // Difficulty as the game computes it: all-time question count x last month's overall percent.
            $totalQuestionCount = (int) $sql->count('tkReport', '(id)', "username = '{$u}'");

            $sql->gen("SELECT CAST((SUM(correct)/COUNT(id)*100) AS DECIMAL(5,2)) AS percent
                FROM `#tkReport` WHERE username = '{$u}'
                AND answereddatestamp >= UNIX_TIMESTAMP(CURRENT_DATE() - INTERVAL 1 MONTH)
                AND answereddatestamp <= UNIX_TIMESTAMP(CURRENT_DATE() + INTERVAL 1 DAY)");
            $row = $sql->fetch();
            $percent = (is_array($row) && $row['percent'] !== null) ? (float) $row['percent'] : 0;

            $text .= '<tr><td colspan=2>Difficulty</td><td colspan=2>' . ($totalQuestionCount * $percent) . '</td></tr>';
        }

        $text .= '</table><br/><br/>';

        $missing = (int) $sql->retrieve("SELECT COUNT(*) FROM `#tk_wordList` WHERE `usage` = '' OR `usage` IS NULL");
        $text .= $missing . ' words need a usage entered.<br/>';

        $nextWord = $sql->retrieve("SELECT `indexNo`, `word` FROM `#tk_wordList` WHERE `usage` = '' OR `usage` IS NULL ORDER BY `indexNo` LIMIT 1");
        if (is_array($nextWord)) {
            $text .= 'The next word to be entered is "' . $this->esc($nextWord['word']) . '" at position ' . (int) $nextWord['indexNo'] . '.';
        } else {
            $text .= 'Every word has a usage entered.';
        }

        $ns = e107::getRender();
        $ns->tablerender("Scores", $text);
    }

}

class tk_Wordlist_form_ui extends e_admin_form_ui {

}

class tk_geography_ui extends e_admin_ui {

    protected $pluginTitle = 'TimeKeeper';
    protected $pluginName = 'timekeeper';
    protected $table = 'tk_countries';
    protected $pid = 'id';
    protected $perPage = 10;
    protected $fields = array(
        'checkboxes' => array('title' => '', 'type' => null, 'data' => false, 'width' => '5%', 'thclass' => 'center', 'forced' => '1', 'class' => 'center', 'toggle' => 'e-multiselect',),
        'id' => array('title' => LAN_ID, 'data' => 'int', 'width' => '5%', 'readonly' => 1, 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'country' => array('title' => "Country", 'type' => 'text', 'data' => 'str', 'readonly' => 1, 'width' => '10%', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'currency' => array('title' => "Currency", 'type' => 'text', 'data' => 'str', 'width' => '10%', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'capital' => array('title' => "Capital", 'type' => 'text', 'data' => 'str', 'width' => '10%', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'isoCode' => array('title' => "isoCode", 'type' => 'text', 'data' => 'str', 'width' => '5%', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'difficulty' => array('title' => "Difficulty", 'type' => 'number', 'data' => 'int', 'inline' => true, 'width' => '5%', 'help' => '', 'readParms' => '', 'writeParms' => ['default' => 10, 'min' => 1, 'max' => 10], 'class' => 'left', 'thclass' => 'left',),
        'culture' => array('title' => "Culture", 'type' => 'textarea', 'data' => 'str', 'width' => '20%', 'help' => '', 'readParms' => '', 'writeParms' => '', 'class' => 'left', 'thclass' => 'left',),
        'continent' => array('title' => "Continent", 'type' => 'dropdown', 'data' => 'str', 'inline' => true, 'width' => '10%', 'help' => '', 'readParms' => '', 'writeParms' => ['optArray' => ['Africa'=>'Africa', 'Asia'=>'Asia', 'Europe'=>'Europe', 'North America'=>'North America', 'South America'=>'South America', 'Oceania'=>'Oceania']], 'class' => 'left', 'thclass' => 'left',),
        'map_coords' => array('title' => "Map Coords", 'type' => 'text', 'data' => 'str', 'width' => '10%', 'help' => '', 'readParms' => '', 'writeParms' => ['default' => '{}'], 'class' => 'left', 'thclass' => 'left',),
        'options' => array('title' => LAN_OPTIONS, 'type' => null, 'data' => '', 'width' => '10%', 'thclass' => 'center last', 'class' => 'center last', 'forced' => '1',),
    );
    protected $fieldpref = array('checkboxes', 'id', 'country', 'isoCode', 'difficulty', 'options');

}

class tk_geography_form_ui extends e_admin_form_ui {

}

/*
  =========================================================================
  =====	Student limits (timekeeper table) interface
  =========================================================================
 */

class tk_Students_ui extends e_admin_ui {

    protected $pluginTitle = 'TimeKeeper';
    protected $pluginName = 'timekeeper';
    protected $table = 'timekeeper';
    protected $pid = 'username';
    protected $perPage = 10;
    protected $fields = array(
        'username' => array('title' => "User Name", 'type' => 'text', 'data' => 'str', 'readonly' => 1, 'width' => 'auto', 'class' => 'left', 'thclass' => 'left',),
        'enabled' => array('title' => "Limits on", 'type' => 'bool', 'data' => 'int', 'width' => 'auto', 'class' => 'left', 'thclass' => 'left',),
        'freeMins' => array('title' => "Free minutes", 'type' => 'number', 'data' => 'int', 'width' => 'auto', 'class' => 'left', 'thclass' => 'left',),
        'enableTime' => array('title' => "Play from", 'type' => 'text', 'data' => 'str', 'width' => 'auto', 'class' => 'left', 'thclass' => 'left',),
        'disableTime' => array('title' => "Play until", 'type' => 'text', 'data' => 'str', 'width' => 'auto', 'class' => 'left', 'thclass' => 'left',),
        'minQuestionCount' => array('title' => "Questions needed", 'type' => 'number', 'data' => 'int', 'width' => 'auto', 'class' => 'left', 'thclass' => 'left',),
        'maxDailyPlayTime' => array('title' => "Max minutes a day", 'type' => 'number', 'data' => 'int', 'width' => 'auto', 'class' => 'left', 'thclass' => 'left',),
    );
    protected $fieldpref = array('username', 'enabled', 'freeMins', 'enableTime', 'disableTime', 'minQuestionCount', 'maxDailyPlayTime');

    private function esc($value) {
        return htmlspecialchars((string) $value, ENT_QUOTES, 'UTF-8');
    }

    /**
     * "Student Limits" page: edit every student's row in one form, and add a student.
     * Reached from the menu as Students/custom.
     */
    public function customPage() {

        $sql = e107::getDb();
        $mes = e107::getMessage();

        $action = filter_input(INPUT_POST, 'tk_action');
        if ($action === 'save') {
            $this->saveStudents($sql, $mes);
        } elseif ($action === 'add') {
            $this->addStudent($sql, $mes);
        }

        $text = $this->studentsForm($sql) . $this->addForm();

        e107::getRender()->tablerender('Student Limits', $mes->render() . $text);
    }

    private function loadStudents($sql) {
        $rows = array();
        $sql->gen("SELECT * FROM `#timekeeper` ORDER BY `username`");
        while ($row = $sql->fetch()) {
            $rows[] = $row;
        }
        return $rows;
    }

    private function intValue($entry, $key, $min, $max, $label, &$errors) {
        $value = isset($entry[$key]) ? trim((string) $entry[$key]) : '';
        if (!ctype_digit($value) || (int) $value < $min || (int) $value > $max) {
            $errors[] = $label . ' must be a whole number from ' . $min . ' to ' . $max . '.';
            return null;
        }
        return (int) $value;
    }

    private function timeValue($entry, $key, $label, &$errors) {
        $value = isset($entry[$key]) ? trim((string) $entry[$key]) : '';
        if (!preg_match('/^(\d{1,2})\.(\d{2})$/', $value, $match) || (int) $match[1] > 24 || (int) $match[2] > 59 || ((int) $match[1] === 24 && (int) $match[2] > 0)) {
            $errors[] = $label . ' must look like 9.30 or 22.00 (hours, a dot, then two digits for the minutes).';
            return null;
        }
        return (float) $value;
    }

    /**
     * Save the edited rows. A row with any invalid field is left unchanged
     * (and reported); the others are saved.
     */
    private function saveStudents($sql, $mes) {
        $posted = (isset($_POST['tk']) && is_array($_POST['tk'])) ? $_POST['tk'] : array();

        $existing = array();
        foreach ($this->loadStudents($sql) as $row) {
            $existing[$row['username']] = true;
        }

        $saved = 0;
        foreach ($posted as $entry) {
            if (!is_array($entry) || !isset($entry['username'])) {
                continue;
            }
            $username = (string) $entry['username'];
            if (!isset($existing[$username])) {
                continue; // only students that are already in the table
            }

            $errors = array();
            $freeMins = $this->intValue($entry, 'freeMins', 0, 1440, 'Free minutes', $errors);
            $minQuestionCount = $this->intValue($entry, 'minQuestionCount', 0, 100000, 'Questions needed', $errors);
            $maxDailyPlayTime = $this->intValue($entry, 'maxDailyPlayTime', 0, 1440, 'Max minutes a day', $errors);
            $enableTime = $this->timeValue($entry, 'enableTime', 'Play from', $errors);
            $disableTime = $this->timeValue($entry, 'disableTime', 'Play until', $errors);

            if (!empty($errors)) {
                foreach ($errors as $error) {
                    $mes->addError($this->esc($username) . ': ' . $error . ' Not saved.');
                }
                continue;
            }

            $sql->update('timekeeper', array(
                'enabled' => isset($entry['enabled']) ? 1 : 0,
                'freeMins' => $freeMins,
                'enableTime' => $enableTime,
                'disableTime' => $disableTime,
                'minQuestionCount' => $minQuestionCount,
                'maxDailyPlayTime' => $maxDailyPlayTime,
                'WHERE' => "username = '" . $sql->escape($username) . "'",
            ));
            $saved++;
        }

        if ($saved > 0) {
            $mes->addSuccess('Saved the limits for ' . $saved . ($saved === 1 ? ' student.' : ' students.'));
        }
    }

    /**
     * Add a student with the same starting limits timer.php uses.
     */
    private function addStudent($sql, $mes) {
        $username = trim((string) filter_input(INPUT_POST, 'tk_new_user'));

        if (!preg_match('/^[A-Za-z0-9_.-]{1,50}$/', $username)) {
            $mes->addError('Enter an e107 login name (letters, numbers, . _ - only).');
            return;
        }
        if ($sql->count('user', '(*)', 'user_loginname="' . $sql->escape($username) . '"') < 1) {
            $mes->addError('There is no e107 user with the login name "' . $this->esc($username) . '".');
            return;
        }
        if ($sql->count('timekeeper', '(*)', 'username="' . $sql->escape($username) . '"') > 0) {
            $mes->addError($this->esc($username) . ' already has limits.');
            return;
        }

        $sql->insert('timekeeper', array(
            'username' => $username,
            'enabled' => 1,
            'freeMins' => 10,
            'enableTime' => 10.00,
            'disableTime' => 22.00,
            'minQuestionCount' => 100,
            'usedMinutes' => 0,
            'lastDate' => 0,
            'maxDailyPlayTime' => 1440,
        ));
        $mes->addSuccess('Added ' . $this->esc($username) . ' with the starting limits. Change them below.');
    }

    private function studentsForm($sql) {
        $rows = $this->loadStudents($sql);
        if (empty($rows)) {
            return '<p>No students have limits yet. They are created automatically the first time the enforcement client asks about a student, or you can add one below.</p>';
        }

        $frm = e107::getForm();

        $text = $frm->open('tkStudents', 'post');
        $text .= $frm->hidden('tk_action', 'save');
        $text .= '<table class="table table-striped table-bordered"><thead><tr>'
                . '<th>Student</th><th>Limits on</th><th>Free minutes a day</th><th>Play from</th><th>Play until</th>'
                . '<th>Questions needed today</th><th>Max minutes a day</th><th>Used today</th><th>Earned minutes</th>'
                . '</tr></thead><tbody>';

        foreach ($rows as $i => $row) {
            $name = $row['username'];
            $key = 'tk[' . $i . ']';

            $usedToday = ((int) $row['lastDate'] > 0 && date('Ymd', (int) $row['lastDate']) === date('Ymd')) ? (int) $row['usedMinutes'] : 0;
            $earned = (int) $sql->retrieve('timekeeperScore', 'timekeeper_minutes', 'timekeeper_username="' . $sql->escape($name) . '"');

            $text .= '<tr>'
                    . '<td>' . $this->esc($name) . $frm->hidden($key . '[username]', $name) . '</td>'
                    . '<td>' . $frm->checkbox($key . '[enabled]', 1, !empty($row['enabled'])) . '</td>'
                    . '<td>' . $frm->text($key . '[freeMins]', (int) $row['freeMins'], 6, array('size' => 'mini')) . '</td>'
                    . '<td>' . $frm->text($key . '[enableTime]', number_format((float) $row['enableTime'], 2, '.', ''), 5, array('size' => 'mini')) . '</td>'
                    . '<td>' . $frm->text($key . '[disableTime]', number_format((float) $row['disableTime'], 2, '.', ''), 5, array('size' => 'mini')) . '</td>'
                    . '<td>' . $frm->text($key . '[minQuestionCount]', (int) $row['minQuestionCount'], 6, array('size' => 'mini')) . '</td>'
                    . '<td>' . $frm->text($key . '[maxDailyPlayTime]', (int) $row['maxDailyPlayTime'], 6, array('size' => 'mini')) . '</td>'
                    . '<td>' . $usedToday . '</td>'
                    . '<td>' . $earned . '</td>'
                    . '</tr>';
        }

        $text .= '</tbody></table>';
        $text .= '<div class="buttons-bar center">' . $frm->button('tk_save_button', 'Save changes') . '</div>';
        $text .= $frm->close();

        $text .= '<p class="smalltext">'
                . '<b>Limits on</b> off = no limit for that student. '
                . '<b>Free minutes</b> are available every day without earning them. '
                . '<b>Play from / until</b> are hours.minutes, e.g. 9.30 or 22.00 (always two digits for the minutes: 9.5 means 9:50). '
                . '<b>Questions needed</b> is how many questions must be answered today before earned minutes can be used. '
                . '<b>Max minutes a day</b> is the most play per day, free and earned (0 = no play). '
                . '<b>Used today</b> and <b>Earned minutes</b> are shown for information; change earned minutes on the Score screen.'
                . '</p>';

        return $text;
    }

    private function addForm() {
        $frm = e107::getForm();

        return '<h4>Add a student</h4>'
                . $frm->open('tkAddStudent', 'post')
                . $frm->hidden('tk_action', 'add')
                . $frm->text('tk_new_user', '', 50, array('placeholder' => 'e107 login name'))
                . ' ' . $frm->button('tk_add_button', 'Add student')
                . $frm->close();
    }

}

class tk_Students_form_ui extends e_admin_form_ui {

}

new timekeeper_admin();

require_once(e_ADMIN . "auth.php");
e107::getAdminUI()->runPage();

require_once(e_ADMIN . "footer.php");
exit;