|
| 1 | +package assets |
| 2 | + |
| 3 | +import ( |
| 4 | + "image" |
| 5 | + _ "image/jpeg" |
| 6 | + _ "image/png" |
| 7 | + "os" |
| 8 | + "path/filepath" |
| 9 | + "strings" |
| 10 | + |
| 11 | + "candy/audio" |
| 12 | +) |
| 13 | + |
| 14 | +var imageExtensions = map[string]struct{}{"jpg": {}, "png": {}} |
| 15 | +var audioExtensions = map[string]struct{}{"mp3": {}, "wav": {}} |
| 16 | + |
| 17 | +type Assets struct { |
| 18 | + imageMap map[string]image.Image |
| 19 | + audioMap map[string]audio.Audio |
| 20 | +} |
| 21 | + |
| 22 | +func (a Assets) GetImage(imageName string) image.Image { |
| 23 | + return a.imageMap[convertPath(imageName)] |
| 24 | +} |
| 25 | + |
| 26 | +func (a Assets) GetAudio(audioName string) audio.Audio { |
| 27 | + return a.audioMap[convertPath(audioName)] |
| 28 | +} |
| 29 | + |
| 30 | +func convertPath(path string) string { |
| 31 | + parts := strings.Split(path, "/") |
| 32 | + return filepath.Join(parts...) |
| 33 | +} |
| 34 | + |
| 35 | +func LoadAssets(assetRootDir string) (Assets, error) { |
| 36 | + imageAssets, err := loadImages(assetRootDir) |
| 37 | + if err != nil { |
| 38 | + return Assets{}, err |
| 39 | + } |
| 40 | + audioAssets, err := loadAudios(assetRootDir) |
| 41 | + return Assets{ |
| 42 | + imageMap: imageAssets, |
| 43 | + audioMap: audioAssets, |
| 44 | + }, err |
| 45 | +} |
| 46 | + |
| 47 | +func loadAudios(assetRootDir string) (map[string]audio.Audio, error) { |
| 48 | + audioAssets := make(map[string]audio.Audio) |
| 49 | + err := lisFiles(assetRootDir, func(path string, ext string, rel string) error { |
| 50 | + if _, ok := audioExtensions[ext]; !ok { |
| 51 | + return nil |
| 52 | + } |
| 53 | + file, err := os.Open(path) |
| 54 | + if err != nil { |
| 55 | + return err |
| 56 | + } |
| 57 | + bp, err := audio.NewAudio(file, ext) |
| 58 | + if err != nil { |
| 59 | + return err |
| 60 | + } |
| 61 | + audioAssets[rel] = bp |
| 62 | + return nil |
| 63 | + }) |
| 64 | + return audioAssets, err |
| 65 | +} |
| 66 | + |
| 67 | +func loadImages(assetRootDir string) (map[string]image.Image, error) { |
| 68 | + imageAssets := make(map[string]image.Image) |
| 69 | + err := lisFiles(assetRootDir, func(path string, ext string, rel string) error { |
| 70 | + if _, ok := imageExtensions[ext]; !ok { |
| 71 | + return nil |
| 72 | + } |
| 73 | + file, err := os.Open(path) |
| 74 | + defer file.Close() |
| 75 | + if err != nil { |
| 76 | + return err |
| 77 | + } |
| 78 | + img, _, err := image.Decode(file) |
| 79 | + if err != nil { |
| 80 | + return err |
| 81 | + } |
| 82 | + imageAssets[rel] = img |
| 83 | + return nil |
| 84 | + }) |
| 85 | + return imageAssets, err |
| 86 | +} |
| 87 | + |
| 88 | +func lisFiles(rootDir string, processFile func(path string, ext string, rel string) error) error { |
| 89 | + return filepath.Walk(rootDir, func(path string, info os.FileInfo, err error) error { |
| 90 | + if info.IsDir() { |
| 91 | + return nil |
| 92 | + } |
| 93 | + parts := strings.Split(info.Name(), ".") |
| 94 | + if len(parts) == 0 { |
| 95 | + return nil |
| 96 | + } |
| 97 | + ext := parts[len(parts)-1] |
| 98 | + rel, err := filepath.Rel(rootDir, path) |
| 99 | + return processFile(path, ext, rel) |
| 100 | + }) |
| 101 | +} |
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