Rss-Bridge/lib/Exceptions.php
2018-11-18 09:41:14 +01:00

209 lines
5.7 KiB
PHP

<?php
/**
* This file is part of RSS-Bridge, a PHP project capable of generating RSS and
* Atom feeds for websites that don't have one.
*
* For the full license information, please view the UNLICENSE file distributed
* with this source code.
*
* @package Core
* @license http://unlicense.org/ UNLICENSE
* @link https://github.com/rss-bridge/rss-bridge
*/
/**
* Implements a RSS-Bridge specific exception class
*
* @todo This class serves no purpose, remove it!
*/
class HttpException extends \Exception{}
/**
* Returns an URL that automatically populates a new issue on GitHub based
* on the information provided
*
* @param string $title string Sets the title of the issue
* @param string $body string Sets the body of the issue (GitHub markdown applies)
* @param string $labels mixed (optional) Specifies labels to add to the issue
* @param string $maintainer string (optional) Specifies the maintainer for the issue.
* The maintainer only applies if part of the development team!
* @return string|null A qualified URL to a new issue with populated conent or null.
*
* @todo This function belongs inside a class
*/
function buildGitHubIssueQuery($title, $body, $labels = null, $maintainer = null){
if(!isset($title) || !isset($body) || empty($title) || empty($body)) {
return null;
}
// Add title and body
$uri = REPOSITORY
. 'issues/new?title='
. urlencode($title)
. '&body='
. urlencode($body);
// Add labels
if(!is_null($labels) && is_array($labels) && count($labels) > 0) {
if(count($lables) === 1) {
$uri .= '&labels=' . urlencode($labels[0]);
} else {
foreach($labels as $label) {
$uri .= '&labels[]=' . urlencode($label);
}
}
} elseif(!is_null($labels) && is_string($labels)) {
$uri .= '&labels=' . urlencode($labels);
}
// Add maintainer
if(!empty($maintainer)) {
$uri .= '&assignee=' . urlencode($maintainer);
}
return $uri;
}
/**
* Returns the exception message as HTML string
*
* @param object $e Exception The exception to show
* @param object $bridge object The bridge object
* @return string|null Returns the exception as HTML string or null.
*
* @todo This function belongs inside a class
*/
function buildBridgeException($e, $bridge){
if(( !($e instanceof \Exception) && !($e instanceof \Error)) || !($bridge instanceof \BridgeInterface)) {
return null;
}
$title = $bridge->getName() . ' failed with error ' . $e->getCode();
// Build a GitHub compatible message
$body = 'Error message: `'
. $e->getMessage()
. "`\nQuery string: `"
. $_SERVER['QUERY_STRING']
. "`\nVersion: `"
. Configuration::getVersion()
. '`';
$body_html = nl2br($body);
$link = buildGitHubIssueQuery($title, $body, 'bug report', $bridge->getMaintainer());
$header = buildHeader($e, $bridge);
$message = <<<EOD
<strong>{$bridge->getName()}</strong> was unable to receive or process the
remote website's content!<br>
{$body_html}
EOD;
$section = buildSection($e, $bridge, $message, $link);
return $section;
}
/**
* Returns the exception message as HTML string
*
* @param object $e Exception The exception to show
* @param object $bridge object The bridge object
* @return string|null Returns the exception as HTML string or null.
*
* @todo This function belongs inside a class
*/
function buildTransformException($e, $bridge){
if(( !($e instanceof \Exception) && !($e instanceof \Error)) || !($bridge instanceof \BridgeInterface)) {
return null;
}
$title = $bridge->getName() . ' failed with error ' . $e->getCode();
// Build a GitHub compatible message
$body = 'Error message: `'
. $e->getMessage()
. "`\nQuery string: `"
. $_SERVER['QUERY_STRING'] . '`';
$link = buildGitHubIssueQuery($title, $body, 'bug report', $bridge->getMaintainer());
$header = buildHeader($e, $bridge);
$message = "RSS-Bridge was unable to transform the contents returned by
<strong>{$bridge->getName()}</strong>!";
$section = buildSection($e, $bridge, $message, $link);
return buildPage($title, $header, $section);
}
/**
* Builds a new HTML header with data from a exception an a bridge
*
* @param object $e The exception object
* @param object $bridge The bridge object
* @return string The HTML header
*
* @todo This function belongs inside a class
*/
function buildHeader($e, $bridge){
return <<<EOD
<header>
<h1>Error {$e->getCode()}</h1>
<h2>{$e->getMessage()}</h2>
<p class="status">{$bridge->getName()}</p>
</header>
EOD;
}
/**
* Builds a new HTML section
*
* @param object $e The exception object
* @param object $bridge The bridge object
* @param string $message The message to display
* @param string $link The link to include in the anchor
* @return string The HTML section
*
* @todo This function belongs inside a class
*/
function buildSection($e, $bridge, $message, $link){
return <<<EOD
<section>
<p class="exception-message">{$message}</p>
<div class="advice">
<ul class="advice">
<li>Press Return to check your input parameters</li>
<li>Press F5 to retry</li>
<li>Open a <a href="{$link}">GitHub Issue</a> if this error persists</li>
</ul>
</div>
<a href="{$link}" title="After clicking this button you can review
the issue before submitting it"><button>Open GitHub Issue</button></a>
<p class="maintainer">{$bridge->getMaintainer()}</p>
</section>
EOD;
}
/**
* Builds a new HTML page
*
* @param string $title The HTML title
* @param string $header The HTML header
* @param string $section The HTML section
* @return string The HTML page
*
* @todo This function belongs inside a class
*/
function buildPage($title, $header, $section){
return <<<EOD
<!DOCTYPE html>
<html lang="en">
<head>
<title>{$title}</title>
<link href="static/style.css" rel="stylesheet">
</head>
<body>
{$header}
{$section}
</body>
</html>
EOD;
}