<?php
/*
 * Paste <https://github.com/jordansamuel/PASTE>
 *
 * 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 in GPL.txt for more details.
 */

// UTF-8
header('Content-Type: text/html; charset=utf-8');

// Required functions
define('IN_PONEPASTE', 1);
require_once('includes/common.php');
require_once('includes/geshi.php');
require_once('includes/functions.php');
require_once('includes/password.php');

require_once('includes/Parsedown/Parsedown.php');
require_once('includes/Parsedown/ParsedownExtra.php');
require_once('includes/Parsedown/SecureParsedown.php');

$paste_id = intval(trim($_REQUEST['id']));

updatePageViews($conn);

// Get paste favorite count
$query = $conn->prepare('SELECT COUNT(*) FROM pins WHERE f_paste = ?');
$query->execute([$paste_id]);
$fav_count = intval($query->fetch(PDO::FETCH_NUM)[0]);

// Get paste info
$query = $conn->prepare('SELECT * FROM pastes WHERE id = ?');
$query->execute([$paste_id]);
$row = $query->fetch();

// This is used in the theme files.
$totalpastes = getSiteTotalPastes($conn);

if (!$row) {
    header('HTTP/1.1 404 Not Found');
    $notfound = $lang['notfound']; // "Not found";
} else {
    $p_title    = $row['title'];
    $p_content  = $row['content'];
    $p_visible  = $row['visible'];
    $p_code     = $row['code'];
    $p_expiry   = Trim($row['expiry']);
    $p_password = $row['password'];
    $p_member   = $row['member'];
    $p_date     = $row['date'];
    $now_time   = $row['now_time'];
    $p_encrypt  = $row['encrypt'];
    $p_views    = $row['views'];
    $p_tagsys	= $row['tagsys'];

    $mod_date = date("jS F Y h:i:s A", $now_time);

    $p_private_error = '0';
    if ($p_visible == "2") {
        if (isset($_SESSION['username'])) {
            if ($p_member == Trim($_SESSION['username'])) {
            } else {
                $notfound           = $lang['privatepaste']; //" This is a private paste.";
                $p_private_error = '1';
                goto Not_Valid_Paste;
            }
        } else {
            $notfound           = $lang['privatepaste']; //" This is a private paste. If you created this paste, please login to view it.";
            $p_private_error = '1';
            goto Not_Valid_Paste;
        }
    }

    if (!empty($p_expiry) && $p_expiry !== 'SELF') {
        $input_time   = $p_expiry;
        $current_time = mktime(date("H"), date("i"), date("s"), date("n"), date("j"), date("Y"));
        if ($input_time < $current_time) {
            $notfound       = $lang['expired'];
            $p_private_error = 1;
            goto Not_Valid_Paste;
        }
    }

    if (!empty($p_encrypt)) {
        $p_content = decrypt($p_content);
    }

    $op_content = Trim(htmlspecialchars_decode($p_content));

    // Download the paste
    if (isset($_GET['download'])) {
        if ($p_password == "NONE") {
            doDownload($paste_id, $p_title, $p_member, $op_content, $p_code);
            exit();
        } else {
            if (isset($_GET['password'])) {
                if (password_verify($_GET['password'],$p_password)) {
                    doDownload($paste_id, $p_title, $p_member, $op_content, $p_code);
                    exit();
                } else {
                    $error = $lang['wrongpassword']; // 'Wrong password';
                }
            } else {
                $error = $lang['pwdprotected']; // 'Password protected paste';
            }
        }
    }

    // Raw view
    if (isset($_GET['raw'])) {
        if ($p_password == "NONE") {
            rawView($paste_id, $p_title, $op_content, $p_code);
            exit();
        } else {
            if (isset($_GET['password'])) {
                if (password_verify($_GET['password'],$p_password)) {
                    rawView($paste_id, $p_title, $op_content, $p_code);
                    exit();
                } else {
                    $error = $lang['wrongpassword']; // 'Wrong password';
                }
            } else {
                $error = $lang['pwdprotected']; // 'Password protected paste';
            }
        }
    }

    // Preprocess
    $highlight   = array();
    $prefix_size = strlen('!highlight!');
    if ($prefix_size) {
        $lines     = explode("\n", $p_content);
        $p_content = "";
        foreach ($lines as $idx => $line) {
            if (substr($line, 0, $prefix_size) == '!highlight!') {
                $highlight[] = $idx + 1;
                $line        = substr($line, $prefix_size);
            }
            $p_content .= $line . "\n";
        }
        $p_content = rtrim($p_content);
    }

    // Apply syntax highlight
    $p_content = htmlspecialchars_decode($p_content);
    if ($p_code === "pastedown") {
        $Parsedown = new Parsedown();
        $Parsedown->setSafeMode(true);
        $p_content = $Parsedown->text( $p_content );
    } else {
        $geshi = new GeSHi($p_content, $p_code, 'includes/geshi/');

        $geshi->enable_classes();
        $geshi->set_header_type(GESHI_HEADER_DIV);
        $geshi->set_line_style('color: #aaaaaa; width:auto;');
        $geshi->set_code_style('color: #757584;');
        if (count($highlight)) {
            $geshi->enable_line_numbers(GESHI_NORMAL_LINE_NUMBERS);
            $geshi->highlight_lines_extra($highlight);
            $geshi->set_highlight_lines_extra_style('color:#399bff;background:rgba(38,92,255,0.14);');
        } else {
            $geshi->enable_line_numbers(GESHI_FANCY_LINE_NUMBERS, 2);
        }
        $p_content = $geshi->parse_code();
        $style     = $geshi->get_stylesheet();
        $ges_style = '<style>' . $style . '</style>';
    }

    // Embed view after GeSHI is applied so that $p_code is syntax highlighted as it should be.
    if (isset($_GET['embed'])) {
        if ( $p_password == "NONE" ) {
            embedView( $paste_id, $p_title, $p_content, $p_code, $title, $baseurl, $ges_style, $lang );
            exit();
        } else {
            if ( isset( $_GET['password'] ) ) {
                if ( password_verify( $_GET['password'], $p_password ) ) {
                    embedView( $paste_id, $p_title, $p_content, $p_code, $title, $p_baseurl, $ges_style, $lang );
                    exit();
                } else {
                    $error = $lang['wrongpassword']; // 'Wrong password';
                }
            } else {
                $error = $lang['pwdprotected']; // 'Password protected paste';
            }
        }
    }
}

require_once('theme/' . $default_theme . '/header.php');
if ($p_password == "NONE") {
    
    // No password & diplay the paste
    
    // Set download URL
	if ($mod_rewrite == '1') {
		$p_download = "download/$paste_id";
	} else {
		$p_download = "paste.php?download&id=$paste_id";
	}
	
	// Set raw URL
	if ($mod_rewrite == '1') {
		$p_raw = "raw/$paste_id";
	} else {
		$p_raw = "paste.php?raw&id=$paste_id";
	}

	// Set embed URL
	if ( $mod_rewrite == '1' ) {
		$p_embed = "embed/$paste_id";
	} else {
		$p_embed = "paste.php?embed&id=$paste_id";
	}
    
        //pasteviews
    if($_SESSION['not_unique'] !== $paste_id) {
    $_SESSION['not_unique'] = $paste_id;
    updateMyView($conn, $paste_id);
}
    
    // Theme
    require_once('theme/' . $default_theme . '/view.php');
    if ($p_expiry == "SELF") {
        deleteMyPaste($con, $paste_id);
    }
} else {
    $p_download = "paste.php?download&id=$paste_id&password=" . password_hash(isset($_POST['mypass']), PASSWORD_DEFAULT);
    $p_raw = "paste.php?raw&id=$paste_id&password=" . password_hash(isset($_POST['mypass']), PASSWORD_DEFAULT);
    // Check password
    if (isset($_POST['mypass'])) {
        if (password_verify($_POST['mypass'], $p_password)) {
            // Theme
            require_once('theme/' . $default_theme . '/view.php');
            if ($p_expiry == "SELF") {
                deleteMyPaste($con, $paste_id);
            }
        } else {
            $error = $lang['wrongpwd']; //"Password is wrong";
            require_once('theme/' . $default_theme . '/errors.php');
        }
    } else {
        // Display errors
        require_once('theme/' . $default_theme . '/errors.php');
    }
}

Not_Valid_Paste:
// Private paste not valid
if ($p_private_error == '1') {
    // Display errors
    require_once('theme/' . $default_theme . '/header.php');
    require_once('theme/' . $default_theme . '/errors.php');
}

// Footer
require_once('theme/' . $default_theme . '/footer.php');
?>