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loader.go
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loader.go
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package metadata
import (
"sort"
)
type Loader interface {
CanHandle(string) Loader
LoadMetadata(string) (map[string]interface{}, error)
}
type LoaderGroup struct {
Pass int
Checksum bool
Finalize bool
Loaders []Loader
}
type LoaderSet []LoaderGroup
func (self LoaderSet) Passes() (passes []int) {
for _, group := range self {
if group.Pass > 0 {
passes = append(passes, group.Pass)
}
}
sort.Ints(passes)
return
}
func GetChecksumPass() int {
for _, loader := range GetLoaders() {
if loader.Checksum {
return loader.Pass
}
}
return -1
}
func GetLoaders() LoaderSet {
initMime.Do(func() {
SetupMimeTypes()
})
return LoaderSet{
{
Pass: 1,
Loaders: []Loader{
&FileLoader{},
&RegexLoader{},
&MediaLoader{},
&YTDLLoader{},
},
}, {
Pass: 2,
Checksum: true,
Finalize: true,
Loaders: []Loader{
&AudioLoader{},
&VideoLoader{},
},
},
}
}
func GetLoaderGroupForPass(pass int) *LoaderGroup {
for _, group := range GetLoaders() {
if group.Pass == pass {
return &group
}
}
return nil
}
func GetLoadersForFile(name string, pass int) []Loader {
loaders := make([]Loader, 0)
for _, group := range GetLoaders() {
if pass <= 0 || group.Pass == pass {
for _, loader := range group.Loaders {
if instance := loader.CanHandle(name); instance != nil {
loaders = append(loaders, instance)
}
}
}
}
return loaders
}
func IsFinalizePass(pass int) bool {
for _, group := range GetLoaders() {
if group.Pass == pass {
if group.Finalize {
return true
}
}
}
return false
}