TimeKeeper/questionGenerators/math/numbers2.php

<?php

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 * Description of numbers
 *
 * @author gregory
 */
class numbers2 {

    private $user;

    /**
     * Setup new numbers engine
     * 
     * @param bool $test Enable debug mode.
     */
    public function __construct($user) {
       
        $this->user = $user;

    }

    public function getNumbers() {

        $difficulty = $this->difficulty();
        $question = $this->getSequence($difficulty);
        $questionHtml = $this->htmlify($question);
        
        e107::getDb()->insert('tkLastQuestion', ['user'=>$this->user,'LastQuestionHtml'=>base64_encode($questionHtml)]);
        
        e107::getRender()->tablerender('Numbers', $questionHtml);
    }

    /**
     * Return the difficulty based on previously answered questions.
     *
     * @return int Difficulty as percent.
     */
    private function difficulty() {

        $stats = e107::getDb()->retrieve("SELECT (SUM(correct)/COUNT(correct)*100) as percent,COUNT(correct) as count
            FROM e107.`e107_tkReport` WHERE 
            answereddatestamp >= unix_timestamp((NOW()) - INTERVAL 1 MONTH)
            AND username = '$this->user' AND subject = 'numbers';");
        
        if ($stats["count"]==0) {
            return 1;
        } else {
            return $stats;
        }
        
     
    }
    
    private function getSequence($difficulty) {
        
        //print_a(['slide'=>($difficulty['percent']/100)*2,'diff'=>$difficulty,'pow'=>(int)pow($difficulty['count'],($difficulty['percent']/100)*2)]);
        
        $startingNumber = mt_rand(0, (int) pow($difficulty['count'],($difficulty['percent']/100)*2));
        if($difficulty['count']>=300) {
            $incrementalNumber = mt_rand(1, 100 );
        }elseif($difficulty['count']>=200){
            $incrementalNumber = mt_rand(1, 10 );
        }elseif($difficulty['count']>=100){
            $incrementalNumber = mt_rand(1, 5 );
        }else{
            $incrementalNumber = mt_rand(1, 2);
        }
        $missingNumber = mt_rand(1, 10);
        $TempQuestion = [];
        
        for ($i = 1; $i <= 10; $i++) {
            if ($i == $missingNumber) {
                $TempQuestion[] = "___,";
                $solution = round($startingNumber);
            } elseif ($i == 10) {
                $TempQuestion[] = round($startingNumber);
            } else {
                $TempQuestion[] = round($startingNumber) . ",";
            }
            if($difficulty['percent']>=90 && $difficulty['count']>=200){
                $startingNumber += round((2*$incrementalNumber)/$i);
            }elseif($difficulty['percent']>=80 && $difficulty['count']>=100){
                $startingNumber += $incrementalNumber*($i*15);
            }else{
                $startingNumber += $incrementalNumber;
            }
        }
        return [ 'answer1'=>$solution, 'question'=>$TempQuestion, 'type'=>'numbers'];
    }

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

        $fString = $frm->open('questionForm', 'post', '', ['autocomplete' => 'off', 'class' => 'formclass']);
        $fString .= $frm->label('<h4>Numbers</h4>') . "</br>\n";
        $fString .= $frm->label('Find the missing number.') . "\n";
        $fString .= '</br>';
        
        foreach ($question['question'] as $seq) {
            $fString .= $frm->label($seq . " &nbsp; ") . "\n";
        }
        
        $fString .= '</br></br>';
        $fString .= $frm->text('a1', '', 80, ['placeholder' => 'Write answer here!', 'autocomplete' => "off", 'spellcheck' => "false"]) . "\n";
        $fString .= $frm->hidden('checkerData', TkAnswerStore::issue($this->user, $question), ['id' => 'checkerData']);
        $fString .= $frm->hidden('subject', 'numbers', ['id' => 'subject']);
        $fString .= '</br>' . "\n";
        $fString .= e107::getForm()->button('Answer', 'Check answer') . "\n";
        $fString .= e107::getForm()->close();
        $fString .= '</br></br>';
        
        return $fString;
        
    }
}