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phorge/src/applications/search/ferret/function/FerretSearchFunction.php
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FerretSearchFunction.php
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<?php
abstract class FerretSearchFunction
extends Phobject {
abstract public function getFerretFunctionName();
abstract public function getFerretFieldKey();
abstract public function supportsObject(PhabricatorFerretInterface $object);
final public static function getNormalizedFunctionName($name) {
return phutil_utf8_strtolower($name);
}
final public static function validateFerretFunctionName($function_name) {
if (!preg_match('/^[a-zA-Z-]+\z/', $function_name)) {
throw new Exception(
pht(
'Ferret search engine function name ("%s") is invalid. Function '.
'names must be nonempty and may only contain latin letters and '.
'hyphens.',
$function_name));
}
}
final public static function validateFerretFunctionFieldKey($field_key) {
if (!preg_match('/^[a-z]{4}\z/', $field_key)) {
throw new Exception(
pht(
'Ferret search engine field key ("%s") is invalid. Field keys '.
'must be exactly four characters long and contain only '.
'lowercase latin letters.',
$field_key));
}
}
final public static function newFerretSearchFunctions() {
$extensions = PhabricatorFulltextEngineExtension::getAllExtensions();
$function_map = array();
$field_map = array();
$results = array();
foreach ($extensions as $extension) {
$functions = $extension->newFerretSearchFunctions();
if (!is_array($functions)) {
throw new Exception(
pht(
'Expected fulltext engine extension ("%s") to return a '.
'list of functions from "newFerretSearchFunctions()", '.
'got "%s".',
get_class($extension),
phutil_describe_type($functions)));
}
foreach ($functions as $idx => $function) {
if (!($function instanceof FerretSearchFunction)) {
throw new Exception(
pht(
'Expected fulltext engine extension ("%s") to return a list '.
'of "FerretSearchFunction" objects from '.
'"newFerretSearchFunctions()", but found something else '.
'("%s") at index "%s".',
get_class($extension),
phutil_describe_type($function),
$idx));
}
$function_name = $function->getFerretFunctionName();
self::validateFerretFunctionName($function_name);
$normal_name = self::getNormalizedFunctionName(
$function_name);
if ($normal_name !== $function_name) {
throw new Exception(
pht(
'Ferret function "%s" is specified with a denormalized name. '.
'Instead, specify the function using the normalized '.
'function name ("%s").',
$function_name,
$normal_name));
}
if (isset($function_map[$function_name])) {
$other_extension = $function_map[$function_name];
throw new Exception(
pht(
'Two different fulltext engine extensions ("%s" and "%s") '.
'both define a search function with the same name ("%s"). '.
'Each function must have a unique name.',
get_class($extension),
get_class($other_extension),
$function_name));
}
$function_map[$function_name] = $extension;
$field_key = $function->getFerretFieldKey();
self::validateFerretFunctionFieldKey($field_key);
if (isset($field_map[$field_key])) {
$other_extension = $field_map[$field_key];
throw new Exception(
pht(
'Two different fulltext engine extensions ("%s" and "%s") '.
'both define a search function with the same key ("%s"). '.
'Each function must have a unique key.',
get_class($extension),
get_class($other_extension),
$field_key));
}
$field_map[$field_key] = $extension;
$results[$function_name] = $function;
}
}
ksort($results);
return $results;
}
}

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