public function download_page()

in classes/api/base.php [256:343]

• 58 lines of code
• 11 McCabe index (conditional complexity)

    public function download_page($pageid, $path) {
        $pageendpoint = '/pages/'.$pageid.'/content';
        $response = $this->apicall('get', $pageendpoint);

        // On success, we get an HTML page as response. On failure, we get JSON error object, so we have to decode to check errors.
        $decodedresponse = json_decode($response);

        if (empty($response) || !empty($decodedresponse->error)) {
            \local_onenote\utils::debug('Download error', 'onenote\api\download_page', $response);
            return null;
        }

        // See if the file contains any references to images or other files and if so, create a folder and download those, too.
        $doc = new \DOMDocument('1.0', 'UTF-8');
        $doc->loadHTML(mb_convert_encoding($response, 'HTML-ENTITIES', 'UTF-8'));
        $xpath = new \DOMXPath($doc);

        $this->handle_garbage_chars($xpath);

        // Process span tags to increase font size.
        $this->process_span_tags($xpath);

        $imgnodes = $xpath->query("//img");

        // Create temp folder.
        $tempfolder = $this->create_temp_folder();

        if ($imgnodes && ($imgnodes->length > 0)) {

            $filesfolder = join(DIRECTORY_SEPARATOR, array(rtrim($tempfolder, DIRECTORY_SEPARATOR), 'page_files'));
            if (!mkdir($filesfolder, 0777, true)) {
                echo('Failed to create folder: ' . $filesfolder);
                \local_onenote\utils::debug('Failed to create folde', 'onenote\api\download_page', $filesfolder);
                return null;
            }

            // Save images etc.
            $i = 1;
            foreach ($imgnodes as $imgnode) {
                try {
                    $srcnode = $imgnode->attributes->getNamedItem("src");
                    if (!$srcnode) {
                        continue;
                    }
                    $response = $this->geturl($srcnode->nodeValue);
                    if (empty($response)) {
                        continue;
                    }
                    file_put_contents($filesfolder . DIRECTORY_SEPARATOR . 'img_' . $i, $response);

                    // Update img src paths in the html accordingly.
                    $srcnode->nodeValue = '.' . DIRECTORY_SEPARATOR . 'page_files' . DIRECTORY_SEPARATOR . 'img_' . $i;

                    // Remove data_fullres_src if present.
                    if ($imgnode->attributes->getNamedItem("data-fullres-src")) {
                        $imgnode->removeAttribute("data-fullres-src");
                    }
                } catch (\Exception $e) {
                    // Skip image if there is a problem.
                    \local_onenote\utils::debug('Problem saving image', 'onenote\api\download_page', $e);
                }
                $i++;
            }

            // Save the html page itself.
            file_put_contents(join(DIRECTORY_SEPARATOR,
                array(rtrim($tempfolder, DIRECTORY_SEPARATOR), 'page.html')),
                mb_convert_encoding($doc->saveHTML($doc), 'HTML-ENTITIES', 'UTF-8'));

        } else {

            // Save the html page itself.
            file_put_contents(join(DIRECTORY_SEPARATOR,
                array(rtrim($tempfolder, DIRECTORY_SEPARATOR), 'page.html')),
                mb_convert_encoding($response, 'HTML-ENTITIES', 'UTF-8'));

        }

        // Zip up the folder so it can be attached as a single file.
        $fp = get_file_packer('application/zip');
        $filelist = array();
        $filelist[] = $tempfolder;

        $fp->archive_to_pathname($filelist, $path);

        fulldelete($tempfolder);
        return array('path' => $path, 'url' => static::API.$pageendpoint);
    }