public static function readAll()
{
if (self::$categories !== false) {
return self::$categories;
}
$fd = fopen(self::CategoryFileName, 'r');
if ($fd == null) {
throw new Exception('File: ' . self::CategoryFileName . ' cannot be opened for reading.');
}
self::$categories = array();
while (!feof($fd)) {
$line = fgets($fd);
if (strlen(trim($line)) == 0) {
continue;
}
$parts = explode('=', $line);
$idNameParts = explode(',', $parts[0]);
$category = new Category($idNameParts[0], $idNameParts[1]);
$parts = explode(';', trim($parts[1]));
foreach ($parts as $part) {
$category->addTransactionDescription(substr($part, 1, strlen($part) - 2));
}
self::$categories[$category->id] = $category;
}
return self::$categories;
}