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<?php
function textbook_companion_download_book()
{
$preference_id = arg(2);
_latex_copy_script_file();
$full_book = arg(3);
if ($full_book == "1")
_latex_generate_files($preference_id, TRUE);
else
_latex_generate_files($preference_id, FALSE);
}
function _latex_generate_files($preference_id, $full_book = FALSE)
{
$root_path = textbook_companion_path();
$dir_path = $root_path . "latex/";
$book_filedata = "";
$contributor_filedata = "";
$latex_filedata = "";
$latex_dep_filedata = "";
$depedency_list = array();
$eol = "\n";
$sep = "#";
$preference_q = db_query("SELECT * FROM {textbook_companion_preference} WHERE id = %d", $preference_id);
$preference_data = db_fetch_object($preference_q);
if (!$preference_data)
{
drupal_set_message('Invalid book specified.', 'error');
drupal_goto('');
}
if ($preference_data->approval_status == 0)
{
drupal_set_message('Book proposal is still in pending review.', 'error');
drupal_goto('');
}
$book_filedata = $preference_data->book . $sep . $preference_data->author . $sep . $preference_data->isbn . $sep . $preference_data->publisher . $sep . $preference_data->edition . $sep . $preference_data->year . $eol;
/* regenerate book if full book selected */
if ($full_book)
del_book_pdf($preference_data->id);
/* check if book already generated */
if (file_exists($dir_path . "book_" . $preference_data->id . ".pdf"))
{
/* download zip file */
header('Content-Type: application/pdf');
header('Content-disposition: attachment; filename="' . $preference_data->book . '_' . $preference_data->author . '.pdf"');
header('Content-Length: ' . filesize($dir_path . "book_" . $preference_data->id . ".pdf"));
header("Content-Transfer-Encoding: binary");
header('Expires: 0');
header('Pragma: no-cache');
ob_end_flush();
ob_clean();
flush();
readfile($dir_path . "book_" . $preference_data->id . ".pdf");
return;
}
$proposal_q = db_query("SELECT * FROM {textbook_companion_proposal} WHERE id = %d", $preference_data->proposal_id);
$proposal_data = db_fetch_object($proposal_q);
if (!$proposal_data)
{
drupal_set_message('Could not fetch contributors information for the book specified.', 'error');
}
$contributor_filedata .= $proposal_data->full_name . $sep . $proposal_data->course . $sep . $proposal_data->branch . $sep . $proposal_data->university . $sep . $proposal_data->faculty . $sep . $proposal_data->reviewer . $eol;
$chapter_q = db_query("SELECT * FROM {textbook_companion_chapter} WHERE preference_id = %d ORDER BY number DESC", $preference_data->id);
while ($chapter_data = db_fetch_object($chapter_q))
{
if ($full_book)
$example_q = db_query("SELECT * FROM {textbook_companion_example} WHERE chapter_id = %d ORDER BY number DESC", $chapter_data->id);
else
$example_q = db_query("SELECT * FROM {textbook_companion_example} WHERE chapter_id = %d AND approval_status = 1 ORDER BY number DESC", $chapter_data->id);
while ($example_data = db_fetch_object($example_q))
{
$example_files_q = db_query("SELECT * FROM {textbook_companion_example_files} WHERE example_id = %d", $example_data->id);
while ($example_files_data = db_fetch_object($example_files_q))
{
$latex_filedata .= $chapter_data->number . $sep;
$latex_filedata .= $chapter_data->name . $sep;
$latex_filedata .= $example_data->number . $sep;
$latex_filedata .= $example_data->caption . $sep;
$latex_filedata .= $example_files_data->filename . $sep;
$latex_filedata .= $example_files_data->filepath . $sep;
$latex_filedata .= $example_files_data->filetype . $sep;
$latex_filedata .= $sep;
$latex_filedata .= $example_files_data->id;
$latex_filedata .= $eol;
}
$dependency_files_q = db_query("SELECT * FROM {textbook_companion_example_dependency} WHERE example_id = %d", $example_data->id);
while ($dependency_files_data = db_fetch_object($dependency_files_q))
{
$dependency_q = db_query("SELECT * FROM {textbook_companion_dependency_files} WHERE id = %d LIMIT 1", $dependency_files_data->dependency_id);
if ($dependency_data = db_fetch_object($dependency_q))
{
$latex_filedata .= $chapter_data->number . $sep;
$latex_filedata .= $chapter_data->name . $sep;
$latex_filedata .= $example_data->number . $sep;
$latex_filedata .= $example_data->caption . $sep;
$latex_filedata .= $dependency_data->filename . $sep;
$latex_filedata .= $dependency_data->filepath . $sep;
$latex_filedata .= 'D' . $sep;
$latex_filedata .= $dependency_data->caption . $sep;
$latex_filedata .= $dependency_data->id;
$latex_filedata .= $eol;
$depedency_list[$dependency_data->id] = "D";
}
}
}
}
foreach ($depedency_list as $row => $data) {
$dependency_q = db_query("SELECT * FROM {textbook_companion_dependency_files} WHERE id = %d LIMIT 1", $row);
if ($dependency_data = db_fetch_object($dependency_q))
{
$latex_dep_filedata .= $dependency_data->filename . $sep;
$latex_dep_filedata .= $dependency_data->filepath . $sep;
$latex_dep_filedata .= $dependency_data->caption . $sep;
$latex_dep_filedata .= $dependency_data->id;
$latex_dep_filedata .= $eol;
}
}
/**************************** WRITE TO FILES ********************************/
$download_filename = $preference_data->book . "_" . $preference_data->author;
$book_filename = "tmp_" . $preference_data->id . "_book.txt";
$contributor_filename = "tmp_" . $preference_data->id . "_contributor.txt";
$latex_filename = "tmp_" . $preference_data->id . "_data.txt";
$latex_dep_filename = "tmp_" . $preference_data->id . "_dep_data.txt";
$pdf_filename = "book_" . $preference_data->id . ".pdf";
// $book_filedata = str_replace("&", "\&", $book_filedata);
$fb = fopen($dir_path . $book_filename, 'w');
fwrite($fb, $book_filedata);
fclose($fb);
// $contributor_filedata = str_replace("&", "\&", $contributor_filedata);
$fc = fopen($dir_path . $contributor_filename, 'w');
fwrite($fc, $contributor_filedata);
fclose($fc);
$fl = fopen($dir_path . $latex_filename, 'w');
fwrite($fl, $latex_filedata);
fclose($fl);
$fd = fopen($dir_path . $latex_dep_filename, 'w');
fwrite($fd, $latex_dep_filedata);
fclose($fd);
if (_latex_run_script($book_filename, $contributor_filename, $latex_filename, $latex_dep_filename, $pdf_filename))
{
/* download zip file */
header('Content-Type: application/pdf');
header('Content-disposition: attachment; filename="' . $preference_data->book . '_' . $preference_data->author . '.pdf"');
header('Content-Length: ' . filesize($dir_path . $pdf_filename));
header("Content-Transfer-Encoding: binary");
header('Expires: 0');
header('Pragma: no-cache');
ob_end_flush();
ob_clean();
flush();
readfile($dir_path . $pdf_filename);
} else {
drupal_set_message("Error occurred when generating the PDF version of the Book.", 'error');
}
/*********************** DELETING TEMPORARY FILES ***************************/
/* regenerate book if full book selected */
if ($full_book)
del_book_pdf($preference_data->id);
}
function _latex_copy_script_file()
{
exec("cp ./" . drupal_get_path('module', 'textbook_companion') . "/latex/* ./uploads/latex");
exec("chmod u+x ./uploads/latex/*.sh");
}
function _latex_run_script($book_filename, $contributor_filename, $latex_filename, $latex_dep_filename, $pdf_filename)
{
$root_path = textbook_companion_path();
$ret = 0;
chdir("uploads");
chdir("latex");
$sh_command = "./latex_test.sh " . $book_filename . " " . $contributor_filename . " " . $latex_filename . " " . $latex_dep_filename;
exec($sh_command);
exec("mv TEX_final.pdf " . $pdf_filename);
if ($ret == 0)
return TRUE;
else
return FALSE;
}
function textbook_companion_delete_book()
{
$book_id = arg(2);
del_book_pdf($book_id);
drupal_set_message(t('Book schedule for regeneration.'), 'status');
drupal_goto('code_approval/bulk');
return;
}
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