func (cache *cacheDriver) listObjects(keys []string, key string, r drivers.BucketResourcesMetadata) ([]string, drivers.BucketResourcesMetadata) {
switch true {
// Prefix absent, delimit object key based on delimiter
case r.IsDelimiterSet():
delim := delimiter(key, r.Delimiter)
switch true {
case delim == "" || delim == key:
keys = appendUniq(keys, key)
case delim != "":
r.CommonPrefixes = appendUniq(r.CommonPrefixes, delim)
}
// Prefix present, delimit object key with prefix key based on delimiter
case r.IsDelimiterPrefixSet():
if strings.HasPrefix(key, r.Prefix) {
trimmedName := strings.TrimPrefix(key, r.Prefix)
delim := delimiter(trimmedName, r.Delimiter)
keys, r = cache.filterDelimiterPrefix(keys, key, delim, r)
}
// Prefix present, nothing to delimit
case r.IsPrefixSet():
keys = appendUniq(keys, key)
// Prefix and delimiter absent
case r.IsDefault():
keys = appendUniq(keys, key)
}
return keys, r
}
func (fs *fsDriver) filterObjects(bucket, name string, file os.FileInfo, resources drivers.BucketResourcesMetadata) (drivers.ObjectMetadata, drivers.BucketResourcesMetadata, error) {
var err error
var metadata drivers.ObjectMetadata
switch true {
// Both delimiter and Prefix is present
case resources.IsDelimiterPrefixSet():
if strings.HasPrefix(name, resources.Prefix) {
trimmedName := strings.TrimPrefix(name, resources.Prefix)
delimitedName := delimiter(trimmedName, resources.Delimiter)
switch true {
case name == resources.Prefix:
// Use resources.Prefix to filter out delimited files
metadata, err = fs.GetObjectMetadata(bucket, name)
if err != nil {
return drivers.ObjectMetadata{}, resources, iodine.New(err, nil)
}
case delimitedName == file.Name():
// Use resources.Prefix to filter out delimited files
metadata, err = fs.GetObjectMetadata(bucket, name)
if err != nil {
return drivers.ObjectMetadata{}, resources, iodine.New(err, nil)
}
case delimitedName != "":
resources.CommonPrefixes = appendUniq(resources.CommonPrefixes, resources.Prefix+delimitedName)
}
}
// Delimiter present and Prefix is absent
case resources.IsDelimiterSet():
delimitedName := delimiter(name, resources.Delimiter)
switch true {
case delimitedName == "":
metadata, err = fs.GetObjectMetadata(bucket, name)
if err != nil {
return drivers.ObjectMetadata{}, resources, iodine.New(err, nil)
}
case delimitedName == file.Name():
metadata, err = fs.GetObjectMetadata(bucket, name)
if err != nil {
return drivers.ObjectMetadata{}, resources, iodine.New(err, nil)
}
case delimitedName != "":
resources.CommonPrefixes = appendUniq(resources.CommonPrefixes, delimitedName)
}
// Delimiter is absent and only Prefix is present
case resources.IsPrefixSet():
if strings.HasPrefix(name, resources.Prefix) {
// Do not strip prefix object output
metadata, err = fs.GetObjectMetadata(bucket, name)
if err != nil {
return drivers.ObjectMetadata{}, resources, iodine.New(err, nil)
}
}
case resources.IsDefault():
metadata, err = fs.GetObjectMetadata(bucket, name)
if err != nil {
return drivers.ObjectMetadata{}, resources, iodine.New(err, nil)
}
}
return metadata, resources, nil
}