function scrgen_generate_post_screenshot($post_id)
{
// Workaround bug: http://premium.wpmudev.org/forums/topic/snapshot-faltal-error-on-get_home_path
if (!function_exists('get_home_path')) {
require_once dirname(__FILE__) . '/../../../wp-admin/includes/file.php';
}
$url = get_permalink($post_id);
$url_segs = parse_url($url);
$phantomjs = scrgen_phantomjs();
if (empty($phantomjs)) {
error_log('The phantomjs binary was not found. Make sure it is in your PHP\'s PATH or set the PHANTOMJS constant to its path.');
return;
}
$relative_path = 'wp-content/screenshots/' . $post_id . '.jpg';
$image_path = get_home_path() . $relative_path;
$image_url = get_home_url() . '/' . $relative_path;
$job_id = uniqid();
$job_path = "/tmp/{$job_id}.js";
$tmp_path = "/tmp/{$job_id}.jpg";
$width = scrgen_setting('width');
$height = scrgen_setting('height');
$enable_cropping = scrgen_setting('enable_cropping');
$crop_left = scrgen_setting('crop_left');
$crop_top = scrgen_setting('crop_top');
$crop_width = scrgen_setting('crop_width');
$crop_height = scrgen_setting('crop_height');
$url = strip_tags($url);
$url = str_replace(';', '', $url);
$url = str_replace('"', '', $url);
$url = str_replace('\'', '/', $url);
$url = str_replace('<?', '', $url);
$url = str_replace('<?', '', $url);
$url = str_replace('\\077', ' ', $url);
$url = escapeshellcmd($url);
$src = "\n\n var page = require('webpage').create();\n\n page.viewportSize = { width: {$width}, height: {$height} };\n\n ";
if ($enable_cropping) {
$src .= "page.clipRect = { top: {$crop_top}, left: {$crop_left}, width: {$crop_width}, height: {$crop_height} };";
}
$src .= "\n\n page.open('{$url}', function () {\n page.render('{$tmp_path}');\n phantom.exit();\n });\n\n\n ";
file_put_contents($job_path, $src);
$exec = $phantomjs . ' ' . $job_path;
$escaped_command = escapeshellcmd($exec);
exec($escaped_command);
unlink($job_path);
if (is_file($tmp_path)) {
rename($tmp_path, $image_path);
do_action('scrgen_post_screenshot_generated', $post_id, $image_url);
}
}
function scrgen_options_page()
{
?>
<form action='options.php' method='post'>
<h2>Screenshot Generator</h2>
<p>
Screenshot Generator takes automatic screenshots of posts when they are updated.<br />
These are saved to <code>wp-content/screenshots</code>.
</p>
<?php
if (scrgen_phantomjs() == false) {
?>
<div style="background: #faa; color: #700; padding: 10px 15px; border: 1px solid #c00; margin-right: 20px;">
The PhantomJS binary (<code>phantomjs</code>) could not be found. Screenshot Generator uses PhantomJS to generate screenshots.<br />
Please see the <a href="https://github.com/lassebunk/screenshot-generator#installation" target="_blank">installation instructions</a> for information on how to fix this.
</div>
<?php
}
?>
<?php
if (isset($_REQUEST['msg']) && $_REQUEST['msg'] == 'regenerating') {
?>
<div style="background: #ada; color: #050; padding: 10px 15px; border: 1px solid #090; margin-right: 20px;">
Screenshots are now being regenerated in the background, and will be available when done.<br >
You are welcome to navigate away from this page.
</div>
<?php
}
?>
<?php
settings_fields('scrgen-settings');
do_settings_sections('scrgen-settings');
submit_button();
?>
</form>
<?php
}
