public static function loadTale($filename)
{
if (!file_exists($filename)) {
throw new E5xx_InvalidStoryListFile("Cannot find file '{$filename}' to load");
}
// load the contents
$contents = file_get_contents($filename);
// does it decode?
$tale = json_decode($contents);
if (!$tale) {
throw new E4xx_InvalidStoryListFile("Story list '{$filename}' does not contain valid JSON");
}
// does it have the elements we require?
if (!isset($tale->stories)) {
throw new E4xx_InvalidStoryListFile("Story list '{$filename}' does not contain a 'stories' element");
}
if (!is_array($tale->stories)) {
throw new E4xx_InvalidStoryListFile("The 'stories' element in the story list '{$filename}' must be an array");
}
if (count($tale->stories) == 0) {
throw new E4xx_InvalidStoryListFile("The 'stories' element in the story list '{$filename}' cannot be an empty array");
}
// our base directory to search from
$storiesBasedir = dirname($filename);
// do all of the stories in the list exist?
foreach ($tale->stories as $index => $storyFile) {
$realStoryFile = $storiesBasedir . DIRECTORY_SEPARATOR . $storyFile;
if (file_exists($realStoryFile)) {
throw new E4xx_InvalidStoryListFile("Cannot find the story file '{$realStoryFile}' on disk");
}
$tale->stories[$index] = $realStoryFile;
}
// inject defaults for optional fields
if (!isset($tale->options)) {
$tale->options = new stdClass();
}
if (!isset($tale->options->reuseTestEnvironment)) {
$tale->options->reuseTestEnvironment = false;
}
// all done
return $tale;
}
