Untitled

<?php
ini_set("display_errors",0);
ini_set("log_errors",1);
ini_set("error_log",dirname(__FILE__) . '/error_log.txt');
error_reporting(E_ALL);

header('Cache-Control: no-cache, no-store, must-revalidate');
header('Pragma: no-cache');

// ADJUST THE PATHS TO SUIT YOUR OWN DIRECTORY STRUCTURE
define('USERS', "data/_users.php");
define('BOOKS', "data/_books.php");
define('IMAGES', 'data/images/');  // PATH TO BOOK IMAGES FOLDER
define('DESCRIPTIONS', 'data/descriptions/');  // PATH TO DESCRIPTIONS FOLDER
define('EXCHANGE_RATE', 1.05);
define('JS', 'extra.js');

/**
 *
 */
function updateJavascript() {


    //Open _books.php file to read
    $fh = fopen(BOOKS, "r");

    //Read the file and store in the $bookInfo variable
    $bookInfo = fread($fh, filesize(BOOKS));
    fclose($fh);

    //Explode the  $bookInfo to put in the $lines array
    $lines = explode("\n", $bookInfo);

    //Take out the last line
    array_pop($lines);

    //To write
    array_shift($lines);

    $content = "function createLibrary(){\n";

    foreach ($lines as $line) {

        //Separate columns
        $bookColumns = explode(':', $line);

        //Store in the variables
        $isbn = $bookColumns[0];
        $title = $bookColumns[1];
        $desc = $bookColumns[2];
        $pages = $bookColumns[3];
        $price = $bookColumns[4];
        $image = $bookColumns[5];

        $content .= " books[\"$isbn\"] = new Book (\"$title\" ,\"$desc\", $pages,$price,\"$image\");\n";

    }

    $content .=  "}\n";

        //Open the JS file  to write the $content
    $fh = fopen(JS, "w");
    fwrite($fh, $content);
    flush();
    fclose($fh);


}


/*
 * Description: Deletes a book from the database. Removes the description file
 *              and the book image if its not default.png
 *              Uses BOOKS, IMAGES and DESCRIPTIONS constants
 * Receives:isbn
 * Returns: nothing
 */

function deleteBook($isbn) {
    $fh = fopen(BOOKS, 'r');
    $content = fread($fh, filesize(BOOKS));
    fclose($fh);
    $lines = explode("\n", $content);
    array_pop($lines);
    array_shift($lines);
    $new_array = array("<?php");
    foreach ($lines as $line) {
        $bookColumn = explode(":", $line);
        if ($bookColumn[0] == $isbn) {
            unlink(DESCRIPTIONS . $bookColumn[2]);
            if ($bookColumn[5] != 'default.png') {
                unlink(IMAGES . $bookColumn[5]);
            }
        } else {
            array_push($new_array, $line);
        }
    }
    array_push($new_array, "?>");
    $fh = fopen(BOOKS, 'w');
    fwrite($fh, implode("\n", $new_array));
    fclose($fh);
}

function getAccessLevel($u, $p) {
    $fh = fopen(USERS, "r");
    $content = fread($fh, filesize(USERS));
    fclose($fh);
    $lines = explode("\n", $content);
    array_pop($lines);
    array_shift($lines);
    foreach ($lines as $line) {
        $userInfo = explode(':', $line);
        $user = $userInfo[0];
        $password = $userInfo[1];
        $level = $userInfo[2];

        if ($u == $user) {
            if ($password == $p) {
                return $level;
            }
        }
    }
    return 0;
}

function createFlatDatabase() {
    $fh = fopen(USERS, 'w');
    fwrite($fh, "<?php\nadmin:admin:2\n?>");
    fclose($fh);

    $fh = fopen(BOOKS, 'w');
    fwrite($fh, "<?php\n?>");
    fclose($fh);
}

function getBooks() {

    $content = "";
    $isbn = "";
    $title = "";
    $descriptionFilename = "";
    $pages = 0;
    $price = 0;
    $imagePath = "";
    $desc = "";

    $fh = fopen(BOOKS, "r");
    $bookInfo = fread($fh, filesize(BOOKS));
    fclose($fh);

    $lines = explode("\n", $bookInfo);

    array_pop($lines);
    array_shift($lines);

    foreach ($lines as $line) {

        $bookColumns = explode(':', $line);

        $isbn = $bookColumns[0];
        $title = $bookColumns[1];
        $descriptionFilename = $bookColumns[2];
        $pages = $bookColumns[3];
        $price = $bookColumns[4];
        $imagePath = IMAGES . $bookColumns[5];


        $fh = fopen(DESCRIPTIONS . $descriptionFilename, "r");
        $description = fread($fh, filesize(DESCRIPTIONS . $descriptionFilename));
        fclose($fh);

        $content .= '<div class="book"> <img src="';
        $content .= $imagePath;
        $content .= '" width="150"  alt="$title" />';
        $content .= '<div class="text_left"><h4><span class="title">';
        $content .= $title;
        $content .= '</span></h4><p>';
        $content .= $description;
        $content .= '</p><div class="detail"> <span class="pages">';
        $content .= $pages;
        $content .= ' pages</span> <span class="price">US $';
        $content .= number_format($price * EXCHANGE_RATE,2,".",",");
        $content .= ', CDN $';
        $content .= number_format($price,2,".",",");
        $content .= '</span> <a href=" " id="';
        $content .= $isbn;
        $content .= '" class="addToCart">Add to Shopping Cart</a> </div></div></div>';
    }

    return $content;
}

function getBooksToDelete() {

    $content = "";
    $isbn = "";
    $title = "";
    $descriptionFilename = "";
    $pages = 0;
    $price = 0;
    $imagePath = "";
    $desc = "";

    $fh = fopen(BOOKS, "r");
    $bookInfo = fread($fh, filesize(BOOKS));
    fclose($fh);

    $lines = explode("\n", $bookInfo);

    array_pop($lines);
    array_shift($lines);

    foreach ($lines as $line) {

        $bookColumns = explode(':', $line);

        $isbn = $bookColumns[0];
        $title = $bookColumns[1];
        $descriptionFilename = $bookColumns[2];
        $pages = $bookColumns[3];
        $price = $bookColumns[4];
        $imagePath = IMAGES . $bookColumns[5];


        $fh = fopen(DESCRIPTIONS . $descriptionFilename, "r");
        $description = fread($fh, filesize(DESCRIPTIONS . $descriptionFilename));
        fclose($fh);
        $content .= '<form action="#" method="post" >';
        $content .= '<div class="book"> <img src="';
        $content .= $imagePath;
        $content .= '" width="150"  alt="$title" />';
        $content .= '<div class="text_left"><h4><span class="title">';
        $content .= $title;
        $content .= '</span></h4><p>';
        $content .= $description;
        $content .= '</p><div class="detail"> <span class="pages">';
        $content .= $pages;
        $content .= ' pages</span> <span class="price">US $';
        $content .= $price * EXCHANGE_RATE;
        $content .= ', CDN $';
        $content .= $price;
        $content .= '</span> ';
        $content .= '<input name="delete" type="submit" value="Delete" />';
        $content .= ' </div></div></div>';

        $content .= '<input type="hidden" name="isbn" value="';
        $content .= $isbn;
        $content .= '" />';


        $content .= '</form>';
    }

    return $content;
}

/*
 * function tests if the book the user is entering already exists.
 * It it does, it returns true.
 * Receives: the book's isbn
 * Returns:true, if the book already exists.
 */

function bookExists($isbn) {
    $fh = fopen(BOOKS, "r");
    $content = fread($fh, filesize(BOOKS));
    fclose($fh);
    $lines = explode("\n", $content);
    array_pop($lines);
    array_shift($lines);
    foreach ($lines as $line) {
        $bookInfo = explode(':', $line);
        $i = $bookInfo[0];

        if ($isbn == $i) {
            return true;
        }
    }
    return false;
}

/**
 * Description: Add a book to the database.
 *              If no image is provided then a default image (default.png)is used.
 *              If one is provided then it checks it's  size and decides if
 *              it is a valid image or not.
 *              Will create a description file using the isbn number
 * Receives: isbn,title,description, number of pages, canadian price, FILE image array
 * Returns: 1 if the image exceeds 200k ,
 *          0 if the save was successful
 */
function addBook($isbn, $title, $desc, $pages, $price, $imgFiles) {
    $imageName = "";

    if ($imgFiles['size'] > 300000) {
        return 1;
    }

    // SAVE IMAGE FILE
    if ($imgFiles['size'] == 0) {
        $imageName = "default.png";
    } else {

        $imageName = "p" . time() . $imgFiles['name'];
        $tempName = $imgFiles['tmp_name'];
        move_uploaded_file($tempName, IMAGES . $imageName);
    }


    // SAVE DESCRIPTION FILE
    $descriptionFilename = $isbn . ".txt";
    $fh = fopen(DESCRIPTIONS . $descriptionFilename, 'w');
    fwrite($fh, $desc);
    fclose($fh);

    // SAVE BOOK FILE
    $fh = fopen(BOOKS, "r");
    $content = fread($fh, filesize(BOOKS));
    fclose($fh);
    $lines = explode("\n", $content);
    array_pop($lines);
    array_push($lines, "$isbn:$title:$descriptionFilename:$pages:$price:$imageName");
    array_push($lines, "?>");

    $fh = fopen(BOOKS, 'w');
    fwrite($fh, implode("\n", $lines));
    fclose($fh);
    return 0;
}

?>