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assetLoader.go
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assetLoader.go
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package indexer
import (
"fmt"
"github.com/sp0x/torrentd/indexer/definitions"
"path"
"strings"
)
//An indexer definition loader that uses embedded definitions.
type DefinitionDataLoader func(key string) ([]byte, error)
type AssetLoader struct {
Names []string
Resolver DefinitionDataLoader
}
func embeddedLoader() DefinitionLoader {
return getDefaultEmbeddedDefinitionSource()
}
func getDefaultEmbeddedDefinitionSource() DefinitionLoader {
var src AssetLoader
src.Names = definitions.GzipAssetNames()
src.Resolver = func(key string) ([]byte, error) {
fullname := fmt.Sprintf("definitions/%s.yml", key)
data, err := definitions.GzipAsset(fullname)
if err != nil {
fullname = fmt.Sprintf("definitions/%s.yaml", key)
data, err = definitions.GzipAsset(fullname)
if err != nil {
return nil, err
}
}
data, _ = definitions.UnzipData(data)
return data, nil
}
return &src
}
//CreateEmbeddedDefinitionSource creates a new definition loader from a set of resource names and a loader.
func CreateEmbeddedDefinitionSource(definitionNames []string, loader DefinitionDataLoader) DefinitionLoader {
defLoader := &AssetLoader{}
defLoader.Names = definitionNames
defLoader.Resolver = loader
return defLoader
}
//List all the names of the embedded definitions
func (l *AssetLoader) List(selector *IndexerSelector) ([]string, error) {
var results []string
for _, name := range l.Names {
fname := path.Base(name)
fname = strings.Replace(fname, ".yml", "", -1)
fname = strings.Replace(fname, ".yaml", "", -1)
if selector != nil && !selector.Matches(fname) {
continue
}
results = append(results, fname)
}
return results, nil
}
func (l *AssetLoader) String() string {
return "assets{}"
}
func (l *AssetLoader) ListWithNames(names []string) ([]string, error) {
var results []string
for _, name := range l.Names {
if !contains(names, name) {
continue
}
fname := path.Base(name)
fname = strings.Replace(fname, ".yml", "", -1)
fname = strings.Replace(fname, ".yaml", "", -1)
results = append(results, fname)
}
return results, nil
}
//Load a definition with a given name
func (l *AssetLoader) Load(key string) (*IndexerDefinition, error) {
data, err := l.Resolver(key)
if err != nil {
return nil, err
}
def, err := ParseDefinition(data)
if err != nil {
return def, err
}
def.stats.Source = "asset:" + key
return def, err
}