<?php
/*
 * This file is part of MinigalNano: https://github.com/sebsauvage/MinigalNano
 *
 * MiniGal Nano is based on an original work by Thomas Rybak (© 2010)
 *
 * MinigalNano is licensed under the AGPL v3 (https://gnu.org/licenses/agpl-3.0.txt).
 */

error_reporting(-1);

/**
  * Améliore la sortie print
  *
  * @author  Tatane http://www.tatane.info/index.php/print_rn
  * @author http://www.blog.cactuscrew.com/77-print_rn.html
  * @param $data (array) tableau ou variable à examiner
  * @param $name (string) nom a afficher
  * @return false affiche les clef valeur du tableau $data
  * @example n_print($array, 'Tableau de valeur');
  */
  function n_print($data, $name = '') {
    $aBackTrace = debug_backtrace();
    echo '<h2>', $name, '</h2>';
    echo '<fieldset style="border: 1px solid orange; padding: 5px;color: #333; background-color: #fff;">';
    echo '<legend style="border:1px solid orange;padding: 1px;background-color:#eee;color:orange;">', basename($aBackTrace[0]['file']), ' ligne => ', $aBackTrace[0]['line'], '</legend>';
    echo '<pre>', htmlentities(print_r($data, 1)), '</pre>';
    echo '</fieldset><br />';
  } 

// Do not edit below this section unless you know what you are doing!

header('Content-Type: text/html; charset=UTF-8'); // We use UTF-8 for proper international characters handling.
$version = "0.4.0";
ini_set("memory_limit", "256M");

require "config-default.php";
if(file_exists('config.php')){
    include "config.php";  
}

//-----------------------
// DEFINE VARIABLES
//-----------------------
$page_navigation       = "";
$breadcrumb_navigation = "";
$thumbnails            = "";
$new                   = "";
$images                = "";
$exif_data             = "";
$messages              = "";
$comment               = "";

//-----------------------
// PHP ENVIRONMENT CHECK
//-----------------------
if (!function_exists('exif_read_data') && $display_exif == 1) {
    $display_exif = 0;
    $messages     = "Error: PHP EXIF is not available. Set &#36;display_exif = 0; in config.php to remove this message";
}

//-----------------------
// FUNCTIONS
//-----------------------
function padstring($name, $length)
{
    global $label_max_length;
    if (!isset($length)) {
        $length = $label_max_length;
    }
    if (strlen($name) > $length) {
        return substr($name, 0, $length) . "...";
    }
    return $name;
}

function getfirstImage($dirname)
{
    $imageName  = false;
    $extensions = array("jpg", "png", "jpeg", "gif", "bmp");
    if ($handle = opendir($dirname)) {
        while (false !== ($file = readdir($handle))) {
            if ($file[0] == '.') {
                continue;
            }
            $pathinfo = pathinfo($file);
            if (empty($pathinfo['extension'])) {
                continue;
            }
            $ext = strtolower($pathinfo['extension']);
            if (in_array($ext, $extensions)) {
                $imageName = $file;
                break;
            }
        }
        closedir($handle);
    }
    return $imageName;
}

function parse_fraction($v, $round = 0)
{
    list($x, $y) = array_map('intval', explode('/', $v));
    if (empty($x) || empty($y)) {
        return $v;
    }
    if ($x % $y == 0) {
        return $x / $y;
    }
    if ($y % $x == 0) {
        return "1/" . $y / $x;
    }
    return round($x / $y, $round);
}

function readEXIF($file)
{
    $exif_arr  = array();
    $exif_data = exif_read_data($file);

    $exif_val = @$exif_data['Model'];
    if (!empty($exif_val)) {
        $exif_arr[] = $exif_val;
    }

    $exif_val = @$exif_data['FocalLength'];
    if (!empty($exif_val)) {
        $exif_arr[] = parse_fraction($exif_val) . "mm";
    }

    $exif_val = @$exif_data['ExposureTime'];
    if (!empty($exif_val)) {
        $exif_arr[] = parse_fraction($exif_val, 2) . "s";
    }

    $exif_val = @$exif_data['FNumber'];
    if (!empty($exif_val)) {
        $exif_arr[] = "f" . parse_fraction($exif_val);
    }

    $exif_val = @$exif_data['ISOSpeedRatings'];
    if (!empty($exif_val)) {
        $exif_arr[] = "ISO " . $exif_val;
    }

    if (count($exif_arr) > 0) {
        return "::" . implode(" | ", $exif_arr);
    }

    return $exif_arr;
}

function checkpermissions($file)
{
    global $messages;

    if (!is_readable($file)) {
        $messages = "At least one file or folder has wrong permissions. "
            . "Learn how to <a href='http://minigal.dk/faq-reader/items/"
            . "how-do-i-change-file-permissions-chmod.html' target='_blank'>"
            . "set file permissions</a>";
    }
}

function guardAgainstDirectoryTraversal($path)
{
    $pattern             = "/^(.*\/)?(\.\.)(\/.*)?$/";
    $directory_traversal = preg_match($pattern, $path);

    if ($directory_traversal === 1) {
        die("ERROR: Could not open " . htmlspecialchars(stripslashes($current_dir)) . " for reading!");
    }
}

if (!defined("GALLERY_ROOT")) {
    define("GALLERY_ROOT", "");
}

$requestedDir = '';
if (!empty($_GET['dir'])) {
    $requestedDir = $_GET['dir'];
}

$photo_root  = GALLERY_ROOT . 'photos/';
$thumbdir    = rtrim('photos/' . $requestedDir, '/');
$current_dir = GALLERY_ROOT . $thumbdir;

guardAgainstDirectoryTraversal($current_dir);

//-----------------------
// READ FILES AND FOLDERS
//-----------------------
$files        = array();
$dirs         = array();
$img_captions = array();
if (is_dir($current_dir) && $handle = opendir($current_dir)) {
    // 1. LOAD CAPTIONS
    $caption_filename = "$current_dir/captions.txt";
    if (is_readable($caption_filename)) {
        $caption_handle = fopen($caption_filename, "rb");
        while (!feof($caption_handle)) {
            $caption_line = fgetss($caption_handle);
            if (empty($caption_line)) {
                continue;
            }
            list($img_file, $img_text) = explode('|', $caption_line);
            $img_captions[$img_file]   = trim($img_text);
        }
        fclose($caption_handle);
    }

    while (false !== ($file = readdir($handle))) {
        if (in_array($file, $skip_objects)) {
            continue;
        }
        // 2. LOAD FOLDERS
        if (is_dir($current_dir . "/" . $file)) {
            if ($file != "." && $file != "..") {
                checkpermissions($current_dir . "/" . $file); // Check for correct file permission
                // Set thumbnail to folder.jpg if found:
                if (file_exists($current_dir . '/' . $file . '/folder.jpg')) {
                    $linkParams = http_build_query(
                        array('dir' => ltrim("$requestedDir/$file", '/')),
                        '',
                        '&amp;'
                    );
                    $linkUrl = "?$linkParams";

                    $imgParams = http_build_query(
                        array(
                            'filename' => "$current_dir/$file/folder.jpg",
                            'size'     => $thumb_size,
                        ),
                        '',
                        '&amp;'
                    );
                    $imgUrl = GALLERY_ROOT . "createthumb.php?$imgParams";

                    $dirs[] = array(
                        "name" => $file,
                        "date" => filemtime($current_dir . "/" . $file . "/folder.jpg"),
                        "html" => "
                        <div>
                        <p>
                        <a href=\"{$linkUrl}\">
                        <img src=\"{$imgUrl}\"  alt=\"$label_loading\" width='$thumb_size' height='$thumb_size'/>
                        </a>
                        <span class=\"kt-color\">" . padstring($file, $label_max_length) . "</span>
                        </p>
                        </div>",
                    );
                } else {
                    // Set thumbnail to first image found (if any):
                    unset($firstimage);
                    $firstimage = getfirstImage("$current_dir/" . $file);

                    if ($firstimage != "") {
                        $linkParams = http_build_query(
                            array('dir' => ltrim("$requestedDir/$file", '/')),
                            '',
                            '&amp;'
                        );
                        $linkUrl = "?$linkParams";

                        $imgParams = http_build_query(
                            array(
                                'filename' => "$thumbdir/$file/$firstimage",
                                'size'     => $thumb_size,
                            ),
                            '',
                            '&amp;'
                        );
                        $imgUrl = GALLERY_ROOT . "createthumb.php?$imgParams";

                        $dirs[] = array(
                            "name" => $file,
                            "date" => filemtime($current_dir . "/" . $file),
                            "html" => "
                            <div>
                            <p>
                            <a href=\"{$linkUrl}\">
                            <img src=\"{$imgUrl}\"  alt='$label_loading' width='$thumb_size' height='$thumb_size'/>
                            </a>
                            <span class=\"kt-color\">" . padstring($file, $label_max_length) . "</span>
                            </p>
                            </div>",
                        );
                    } else {
                        // If no folder.jpg or image is found, then display default icon:
                        $linkParams = http_build_query(
                            array('dir' => ltrim("$requestedDir/$file", '/')),
                            '',
                            '&amp;'
                        );
                        $linkUrl = "?$linkParams";
                        $imgUrl  = GALLERY_ROOT . 'images/folder_' . strtolower($folder_color) . '.png';

                        $dirs[] = array(
                            "name" => $file,
                            "date" => filemtime($current_dir . "/" . $file),
                            "html" => "
                            <div>
                            <p>
                            <a href=\"{$linkUrl}\">
                            <img src=\"{$imgUrl}\" width='$thumb_size' height='$thumb_size' alt='$label_loading' />
                            </a>
                            <span class=\" kt-color\">" . padstring($file, $label_max_length) . "</span>
                            </p>
                            </div>",
                        );
                    }
                }
            }
        }
        // 3. LOAD FILES
        if ($file != "." && $file != ".." && $file != "folder.jpg") {
            if ($display_filename) {
                $filename_caption = '<span class="kt-color">' . padstring($file, $label_max_length) . '</span>';
            } else {
                $filename_caption = '';
            }
            if (is_file($current_dir . '/' . $file . '.html')) {
                $imgComment = $img_captions[$file] = '<h4>'.$file . '</h4>' . htmlspecialchars(file_get_contents($current_dir . '/' . $file . '.html'), ENT_QUOTES);
            } else {
                $imgComment = '<h4>'.$file . '</h4>';
            }


            // JPG, GIF and PNG
            if (preg_match("/.jpg$|.gif$|.bmp$|.png$/i", $file)) {
                $path_parts = pathinfo($file);
                if(file_exists($current_dir.'/'.$path_parts['filename'].'.mp4')){
                    $dataVideo = ' data-video="'.$current_dir.'/'.$path_parts['filename'].'.mp4'.'" ';
                    if (is_file($current_dir.'/'.$path_parts['filename'].'.info.json')) {
                        $infoContent = json_decode(file_get_contents($current_dir.'/'.$path_parts['filename'].'.info.json'));
                        $descContent = nl2br(htmlspecialchars('<span>Origin : </span>'.$infoContent->webpage_url.'<br><span>Description : </span>'.$infoContent->description));
                        $imgComment = $img_captions[$file] = '<h4>'.$file . '</h4>'.$descContent;
                    } else {
                        $imgComment = '<h4>'.$file . '</h4>';
                    }
                    $videoWithComment = true;
                } else {
                    $dataVideo = null;
                }
                //Read EXIF
                if (!array_key_exists($file, $img_captions)) {
                    if ($display_exif == 1) {
                        $exifReaden = exif_read_data($current_dir . "/" . $file);
                        //Add to the caption all the EXIF information
                        $img_captions[$file] = $file . $exifReaden;
                    } else {
                        //If no EXIF, just use the filename as caption
                        $img_captions[$file] = $file;
                    }
                }
                // Read the optionnal image title and caption in html file (image.jpg --> image.jpg.html)
                // Format: title::caption
                // Example: My cat::My cat like to <i>roll</i> on the floor.
                // If file is not provided, image filename will be used instead.
                checkpermissions($current_dir . "/" . $file);

                $linkUrl   = str_replace('%2F', '/', rawurlencode("$current_dir/$file"));
                $imgParams = http_build_query(
                    array('filename' => "$thumbdir/$file", 'size' => $thumb_size),
                    '',
                    '&amp;');
                $imgUrl = GALLERY_ROOT . "createthumb.php?$imgParams";
                if ($lazyload) {
                    $imgopts = "class=\"b-lazy\" src=data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw== data-src=\"$imgUrl\"";
                } else {
                    $imgopts = "src=\"{$imgUrl}\"";
                }
                $files[] = array(
                    "name" => $file,
                    "date" => filemtime($current_dir . "/" . $file),
                    "size" => filesize($current_dir . "/" . $file),
                    "html" => '
                    <div>
                    <p class="w3-black">
                        <a onclick="onClick(this);return false;" '.$dataVideo.' href="'.$linkUrl.'" data-desc="'.$imgComment.'" title="' . htmlentities($img_captions[$file]) . '">
                            <img '.$imgopts.' alt="'.$label_loading.'" class="w3-round" />
                        </a>'. $filename_caption . '
                    </p>
                    </div>');
            }
            // Other filetypes
            $extension = "";
            if (preg_match("/\.pdf$/i", $file)) {
                $extension = "PDF";
            }
            // PDF
            if (preg_match("/\.zip$/i", $file)) {
                $extension = "ZIP";
            }
            // ZIP archive
            if (preg_match("/\.rar$|\.r[0-9]{2,}/i", $file)) {
                $extension = "RAR";
            }
            // RAR Archive
            if (preg_match("/\.tar$/i", $file)) {
                $extension = "TAR";
            }
            // TARball archive
            if (preg_match("/\.gz$/i", $file)) {
                $extension = "GZ";
            }
            // GZip archive
            if (preg_match("/\.doc$|\.docx$/i", $file)) {
                $extension = "DOCX";
            }
            // Word
            if (preg_match("/\.ppt$|\.pptx$/i", $file)) {
                $extension = "PPTX";
            }
            //Powerpoint
            if (preg_match("/\.xls$|\.xlsx$/i", $file)) {
                $extension = "XLXS";
            }
            // Excel
            if (preg_match("/\.ogv$|\.mp4$|\.mpg$|\.mpeg$|\.mov$|\.avi$|\.wmv$|\.flv$|\.webm$/i", $file) && empty($videoWithComment)) {
				$extension = "VIDEO";
			}
			// video files
            if (preg_match("/\.aiff$|\.aif$|\.wma$|\.aac$|\.flac$|\.mp3$|\.ogg$|\.m4a$/i", $file)) {
                $extension = "AUDIO";
            }
            // audio files
            if ($extension != "") {
                $files[] = array(
                    "name" => $file,
                    "date" => filemtime($current_dir . "/" . $file),
                    "size" => filesize($current_dir . "/" . $file),
                    "html" => '
                    <div>
                    <p>
                        <a href="'.$current_dir.'/'.$file.'" title="'.$file.'">
                        <img src="' . GALLERY_ROOT .'images/filetype_' . $extension . '.png" alt="'.$file.'" width="'.$thumb_size.'" height="'.$thumb_size.'"/>
                        </a>'.$filename_caption.'
                    </p>
                    </div>');
            }
        }
    }
    closedir($handle);
} else {
    die("ERROR: Could not open " . htmlspecialchars(stripslashes($current_dir)) . " for reading!");
}

//-----------------------
// SORT FILES AND FOLDERS
//-----------------------
$nbDir = count($dirs);
$nbFile = count($files);
if ($nbDir > 0) {
    foreach ($dirs as $key => $row) {
        if ($row["name"] == "") {
            unset($dirs[$key]); //Delete empty array entries
            continue;
        }
        $name[$key] = strtolower($row['name']);
        $date[$key] = strtolower($row['date']);
    }
    @array_multisort($$sorting_folders, $sortdir_folders, $name, $sortdir_folders, $dirs);
}

if ($nbFile > 0) {
    foreach ($files as $key => $row) {
        if ($row["name"] == "") {
            unset($files[$key]); //Delete empty array entries
            continue;
        }
        $name[$key] = strtolower($row['name']);
        $date[$key] = strtolower($row['date']);
        $size[$key] = strtolower($row['size']);
    }
    @array_multisort($$sorting_files, $sortdir_files, $name, SORT_ASC, $files);
}

//-----------------------
// OFFSET DETERMINATION
//-----------------------
if (!isset($_GET["page"])) {
    $_GET["page"] = 1;
}

$offset_start = ($_GET["page"] * $thumbs_pr_page) - $thumbs_pr_page;
$offset_end   = $offset_start + $thumbs_pr_page;
if ($offset_end > $nbDir + $nbFile) {
    $offset_end = $nbDir + $nbFile;
}

if ($_GET["page"] == "all" || $lazyload) {
    $offset_start = 0;
    $offset_end   = $nbDir + $nbFile;
}

//-----------------------
// PAGE NAVIGATION
//-----------------------
if (!$lazyload && $nbDir + $nbFile > $thumbs_pr_page) {
    for ($i = 1; $i <= ceil(($nbFile + $nbDir) / $thumbs_pr_page); $i++) {
        if ($_GET["page"] == $i) {
            $page_navigation .= '<a href="#" class="w3-button w3-theme">'.$i.'</a>';
        } else {
            $page_navigation .= '<a href="?dir=' . $requestedDir . '&amp;page=' . $i . '" class="w3-button w3-hover-theme">' . $i . '</a>';
        }

        if ($i != ceil(($nbFile + $nbDir) / $thumbs_pr_page)) {
            //$page_navigation .= " | ";
        }

    }
    //Insert link to view all images
    if ($_GET["page"] == "all") {
        $page_navigation .= "$label_all";
    } else {
        $page_navigation .= '<a href="?dir=' . $requestedDir . '&amp;page=all" class="w3-button w3-hover-theme">'.$label_all.'</a>';
    }
}

//-----------------------
// BREADCRUMB NAVIGATION
//-----------------------
if ($requestedDir != "" && $requestedDir != "photos") {
    $breadcrumb_navigation = "<div class=\"NavWrapper\">";
    $breadcrumb_navigation .= "<a href='?dir='>" . $label_home . "</a> $breadcrumb_separator ";
    $navitems = explode("/", htmlspecialchars($_REQUEST['dir']));
    for ($i = 0; $i < count($navitems); $i++) {
        if ($i == count($navitems) - 1) {
            $breadcrumb_navigation .= $navitems[$i];
        } else {
            $breadcrumb_navigation .= "<a href='?dir=";
            for ($x = 0; $x <= $i; $x++) {
                $breadcrumb_navigation .= $navitems[$x];
                if ($x < $i) {
                    $breadcrumb_navigation .= "/";
                }
            }
            $breadcrumb_navigation .= "'>" . $navitems[$i] . "</a> $breadcrumb_separator ";
        }
    }
    $breadcrumb_navigation .= "</div>";
}

//Include hidden links for all images BEFORE current page so lightbox is able to browse images on different pages
for ($y = 0; $y < $offset_start - $nbDir; $y++) {
    $breadcrumb_navigation .= "<a href='" . $current_dir . "/" . $files[$y]["name"] . "' class='hidden' title='" . $img_captions[$files[$y]["name"]] . "'></a>";
}

//-----------------------
// DISPLAY FOLDERS
//-----------------------
if ($nbDir + $nbFile == 0) {
    $thumbnails .= "<div class=\"Empty\">$label_noimages</div> <div class=\"EmptyAdvice\">$label_noimages_advice</div>"; //Display 'no images' text
    if ($current_dir == "photos") {
        $messages =
            "It looks like you have just installed MiniGal Nano.
            Please run the <a href='system_check.php'>system check tool</a>. <br>
            And why not have a look to config.php and customize some values ?";
    }
}
$offset_current = $offset_start;
for ($x = $offset_start; $x < $nbDir && $x < $offset_end; $x++) {
    $offset_current++;
    $thumbnails .= $dirs[$x]["html"];
}

//-----------------------
// DISPLAY FILES
//-----------------------
for ($i = $offset_start - $nbDir; $i < $offset_end && $offset_current < $offset_end; $i++) {
    if ($i >= 0) {
        $offset_current++;
        $thumbnails .= $files[$i]["html"];
    }
}

//Include hidden links for all images AFTER current page so lightbox is able to browse images on different pages
if ($i < 0) {
    $i = 1;
}

for ($y = $i; $y < $nbFile; $y++) {
    if(empty($img_captions[$files[$y]['name']])){
        $img_captions[$files[$y]['name']] = $files[$y]['name'];
    }
    $page_navigation .= '<a href="' . $current_dir . '/' . $files[$y]['name'] . '"  class="hidden" title="' . $img_captions[$files[$y]['name']] . '"></a>';
}

//-----------------------
// OUTPUT MESSAGES
//-----------------------
if ($messages != "") {
    $messages = $messages . "<div><a id=\"closeMessage\" class=\"closeMessage\" href=\"#\"><img src=\"images/close.png\" /></a><div>";
}

// Read folder comment.
$comment_filepath = $current_dir . $file . "/comment.html";
if (file_exists($comment_filepath)) {
    $fd      = fopen($comment_filepath, "r");
    $comment = "<div class=\"Comment\">" . fread($fd, filesize($comment_filepath)) . "</div>";
    fclose($fd);
}

//PROCESS TEMPLATE FILE
if (GALLERY_ROOT != "") {
    $templatefile = GALLERY_ROOT . "templates/integrate.html";
} else {
    $templatefile = "templates/" . $templatefile . ".html";
}

if (!$fd = fopen($templatefile, "r")) {
    echo "Template " . htmlspecialchars(stripslashes($templatefile)) . " not found!";
    exit();
} else {
    $template = fread($fd, filesize($templatefile));
    fclose($fd);
    $template = stripslashes($template);
    $template = preg_replace("/<% title %>/", $title, $template);
    $template = preg_replace("/<% messages %>/", $messages, $template);
    $template = preg_replace("/<% author %>/", $author, $template);
    $template = preg_replace("/<% gallery_root %>/", GALLERY_ROOT, $template);
    $template = preg_replace("/<% images %>/", "$images", $template);
    $template = preg_replace("/<% thumbnails %>/", "$thumbnails", $template);
    $template = preg_replace("/<% breadcrumb_navigation %>/", "$breadcrumb_navigation", $template);
    $template = preg_replace("/<% page_navigation %>/", "$page_navigation", $template);
    $template = preg_replace("/<% folder_comment %>/", "$comment", $template);
    $template = preg_replace("/<% bgcolor %>/", "$backgroundcolor", $template);
    $template = preg_replace("/<% gallery_width %>/", "$gallery_width", $template);
    $template = preg_replace("/<% version %>/", "$version", $template);
    echo "$template";
}
