XForms/Pictcha.php5

<?php

class Pictcha {

    private $pictchaArray = array();
    private $maxPictcha = 0;
    private $pictchaValue = array();
    private $imagesFolder = '';

    public function __construct() {
        $this->imagesFolder = SPath::getRelPath('Common') . '/XForms/pictcha/getImage.php5?id=';
    }

    public function getPictcha() {
        // We wish to return a lising of all of the possible
        // information that could be used for a pictcha
        // So we need to query the pictcha storage file
        $this->getPictchaData();

        // Now that we have all of the pictcha data.  We can randomized and
        // encode the output for the pictcha.
        return ($this->getRandomizedPictcha());
    }

    protected function getPictchaData() {
        // Load in the XML file that contains data about
        // what images to use for pictchas
        $xmlData = file_get_contents(dirname(__FILE__) . '/pictcha.xml');

        if ($xmlData) {
            # initialize the pictcha array
            if (!is_array($this->pictchaArray)) {
                $this->pictchaArray = array();
            }

            # Now that we have the xml data, let's parse it for a list of errors
            $xmlData = simplexml_load_string($xmlData);

            # Each of the pictcha's are categorized into different groups called series.
            # A series contains a listing of all items that look visually similar.  Therefore,
            # only one item will be selected from a series.
            foreach ($xmlData AS $series) {

                # We will now save the root node of the array to be the series name
                $this->pictchaArray[(String)$series->seriesName] = array();
                $this->pictchaArray[(String)$series->seriesName]["folder"] = (String)$series->folder;
                $this->pictchaArray[(String)$series->seriesName]["location"] = array();

                foreach($series->pictcha AS $pictureData) {
                    array_push($this->pictchaArray[(String)$series->seriesName]["location"], (String)$pictureData->location);
                }
            }
        }
    }

    protected function getRandomizedPictcha() {

        # We will randomly select "n" values to generate a Pictcha frame
        # Assuring the each selection has not been previous made
        #
        # First let's store the available series in an array
        $pictchaSeries = array();
        $dOut = "";

        foreach($this->pictchaArray AS $name => $value) {
            array_push($pictchaSeries, $name);
        }

        # We will make a copy of the pictcha Array for later use
        $tempPictchaSeries = $pictchaSeries;

        if (count($tempPictchaSeries) < $this->getMaxPictcha()) {
            $numPictcha = count($tempPictchaSeries);
        } else {
            $numPictcha = $this->getMaxPictcha();
        }

        $pictchaList = array();

        # Now we will choose a random series, remove it from our
        # comparision array, and then choose the next one.
        # The results will be stored in the pictchaList
        while ($numPictcha > 0) {
            $randValue = rand(0, $numPictcha-1);
            array_push($pictchaList, $tempPictchaSeries[$randValue]);

            $temp = $tempPictchaSeries[count($tempPictchaSeries)-1];
            $tempPictchaSeries[$randValue] = $temp;
            array_pop($tempPictchaSeries);
            $numPictcha--;
        }

        # We need to also choose two series to ask the user a question about
        $randA = rand(0, count($pictchaList)-1);
        $randB = "";

        while ($randB == "") {
            $newRand = rand(0, count($pictchaList)-1);
            if ($newRand != $randA) {
                $randB = $newRand;
            }
        }

        $qA = $pictchaList[$randA];
        $qB = $pictchaList[$randB];
        $this->setPictchaData($qA);
        $this->setPictchaData($qB);

        # Now that we have our random pictcha, we will now mask their
        # identities and select an image from each
        $dOut .= ("<table class=\"pchaTable\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n");
        $dOut .= ("<tr class=\"pchaRow\">\n");

        for ($i = 0; $i < count($pictchaList); $i++) {

            $seed = substr(MD5(time()), 0, 4);
            $img = $this->getRandomSeriesPictcha($pictchaList[$i]);
            $folder = substr(MD5($seed . $pictchaList[$i]), 0, 15);
            $file = substr(MD5($seed . $img), 0, 15);
            $pictchaList[$i] =  $folder . $file . $seed;

            if ($i == (int)(count($pictchaList)/2-1)) {
                $dOut .= ("<td class=\"pchaData\" id=\"pchaData_" . ($i+1) . "\"><img width=\"50\" height=\"50\" src=\"" . $this->imagesFolder . "$pictchaList[$i]\" onclick=\"javascript:selectPictcha('$pictchaList[$i]', '" . ($i+1) . "');\" alt=\"pictcha\" /></td>\n");
                $dOut .= ("</tr><tr class=\"pchaRow\">");
            } else {
                $dOut .= ("<td class=\"pchaData\" id=\"pchaData_" . ($i+1) . "\"><img width=\"50\" height=\"50\"  src=\"" . $this->imagesFolder . "$pictchaList[$i]\" onclick=\"javascript:selectPictcha('$pictchaList[$i]', '" . ($i+1) . "');\" alt=\"pictcha\" /></td>\n");
            }
        }

        $dOut .= ("<td style=\"display:none\">");
        $dOut .= ("<input type=\"hidden\" name=\"series_a\" value=\"$qA\"/>\n");
        $dOut .= ("<input type=\"hidden\" name=\"series_b\" value=\"$qB\"/>\n");
        $dOut .= ("<input type=\"hidden\" name=\"pictcha_a\" value=\"\" id=\"pictcha_a\" />\n");
        $dOut .= ("<input type=\"hidden\" name=\"pictcha_b\" value=\"\" id=\"pictcha_b\" />\n");
        $dOut .= ("</td>");
        $dOut .= ("</tr>\n");
        $dOut .= ("</table>\n");

        return ($dOut);
    }

    public function getMaxPictcha() {
        if ($this->maxPictcha != 0) {
            return ($this->maxPictcha);
        } else {
            return (9);
        }
    }

    public function setMaxPictcha($picIn) {
        $this->maxPictcha = $picIn;
    }

    protected function getRandomSeriesPictcha($series) {

        $seriesItem = $this->pictchaArray[$series]["location"];

        $item = rand(0, count($seriesItem)-1);

        return ($this->pictchaArray[$series]["folder"] . "/" . $this->pictchaArray[$series]["location"][$item]);
    }

    public function getPictchaImage($image) {

        $this->getPictchaData();
        // Note, we have used a random "seed" to help make these image be dynamic
        // instead of an absolute hashed location

        // Remove the seed
        $seed = substr($image, strlen($image)-4, strlen($image));

        // We now need to determine the series that this image has come from.
        // To do this, we have encoded in the first 16 characters the MD5
        // checksum for the series name.  We can quickly compare this value
        // to all of the data in the pictchaSeries table.
        $type = "";

        foreach($this->pictchaArray AS $name => $value) {
            if (substr(MD5($seed. $name), 0, 15) == substr($image, 0, 15)) {
                $type = $name;
                break;
            }
        }

        // Now that we know the type, we can determine the exact image by
        // calculating the hash value of the folder location.  Then we
        // can simply iterate through the list of file values and see if any
        // of these values match.
        for ($i = 0; $i < count(@$this->pictchaArray[$type]["location"]); $i++) {

            if (substr($image, 15, 15) == substr(MD5($seed . $this->pictchaArray[$type]["folder"] . "/" . $this->pictchaArray[$type]["location"][$i]), 0, 15)) {
                header("Content-type: image/jpeg");
                print file_get_contents(dirname(__FILE__) . "/pictcha/data/" . $this->pictchaArray[$type]["folder"] . "/" . $this->pictchaArray[$type]["location"][$i]);


                //print ("image is " . $this->pictchaArray[$type]["location"][$i] . "<br />");
                break;
            }
        }
        //print_r($this->pictchaArray);
    }

    protected function getValidImage($series, $image) {

        $this->getPictchaData();
        // Note, we have used a random "seed" to help make these image be dynamic
        // instead of an absolute hashed location

        // Remove the seed
        $seed = substr($image, strlen($image)-4, strlen($image));

        // We now need to determine the series that this image has come from.
        // To do this, we have encoded in the first 16 characters the MD5
        // checksum for the series name.  We can quickly compare this value
        // to all of the data in the pictchaSeries table.
        $type = "";

        foreach($this->pictchaArray AS $name => $value) {
            if (substr(MD5($seed. $name), 0, 15) == substr($image, 0, 15)) {
                $type = $name;
                break;
            }
        }

        // Now that we know the type, we can determine the exact image by
        // calculating the hash value of the folder location.  Then we
        // can simply iterate through the list of file values and see if any
        // of these values match.
        for ($i = 0; $i < count(@$this->pictchaArray[$type]["location"]); $i++) {

            if (substr($image, 15, 15) == substr(MD5($seed . $this->pictchaArray[$type]["folder"] . "/" . $this->pictchaArray[$type]["location"][$i]), 0, 15)) {
                if ($type == $series) {
                    return (true);
                }
            }
        }

        return (false);
    }

    public function getValidPictcha($seriesA, $hashA, $seriesB, $hashB) {
        if ($this->getValidImage($seriesA, $hashA) && $this->getValidImage($seriesB, $hashB)) return (true);
        else return (false);
    }

    public function getJavascript() {

    $data =<<< END_JS
    <script type="text/javascript" charset="utf-8">
    <!--
            var sp = 1; var i;
            var color, letter = '';
            var defaultColor = 'green';
            function selectPictcha(hash, id)
            {

                if (document.getElementById('pchaData_' + id).style.backgroundColor != "" && document.getElementById('pchaData_' + id).style.backgroundColor != defaultColor) {
                    reset();
                }

                else if (sp < 3){

                    color = (sp == 1) ? 'red' : 'blue';
                    letter = (sp == 1) ? 'a' : 'b';
                    document.getElementById('pchaData_' + id).style.background=color;
                    document.getElementById('pictcha_' + letter).value = hash;
                    sp++;
                } else reset();
            }
            function reset()
            {
                sp = 1;
                for (i = 1; i <= 8; i++) document.getElementById('pchaData_' + i).style.background=defaultColor;
                for (i = 0; i < 2; i++) {
                    letter = (i == 1) ? 'a' : 'b';
                    document.getElementById('pictcha_' + letter).value = "";
                }
            }
            -->
        </script>
END_JS;

        return ($data);
    }

    protected function setPictchaData($data) {
        array_push($this->pictchaValue, $data);
    }

    public function getPictchaValue() {
        array_push($this->pictchaValue, "yo Mama");
        return ($this->pictchaValue);
    }
}
?>

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