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package lib
import (
"fmt"
"image"
"image/jpeg"
"io"
"net/http"
"os"
"path/filepath"
"yato/config"
)
// ImageCache handles caching and retrieving images
type ImageCache struct {
cacheDir string
}
// NewImageCache creates a new ImageCache
func NewImageCache() *ImageCache {
cacheDir := filepath.Join(config.ConfigDir, config.AppName, "cache")
return &ImageCache{cacheDir: cacheDir}
}
// GetImage retrieves an image, either from cache or by downloading it
func (c *ImageCache) GetImage(mediaType string, malID int, size string, url string) (image.Image, error) {
cachePath := c.getCachePath(mediaType, malID, size)
// Check if the image is already cached
if img, err := c.loadFromCache(cachePath); err == nil {
return img, nil
}
// If not cached, download and cache the image
return c.downloadAndCache(url, cachePath)
}
func (c *ImageCache) getCachePath(mediaType string, malID int, size string) string {
return filepath.Join(c.cacheDir, mediaType, fmt.Sprintf("%d", malID), size+".jpg")
}
func (c *ImageCache) loadFromCache(path string) (image.Image, error) {
file, err := os.Open(path)
if err != nil {
return nil, err
}
defer file.Close()
img, err := jpeg.Decode(file)
if err != nil {
return nil, err
}
return img, nil
}
func (c *ImageCache) downloadAndCache(url, cachePath string) (image.Image, error) {
resp, err := http.Get(url)
if err != nil {
return nil, err
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return nil, fmt.Errorf("failed to download image: %s", resp.Status)
}
// Ensure the cache directory exists
if err := os.MkdirAll(filepath.Dir(cachePath), 0755); err != nil {
return nil, err
}
// Create the cache file
cacheFile, err := os.Create(cachePath)
if err != nil {
return nil, err
}
defer cacheFile.Close()
// Download and write to cache file
_, err = io.Copy(cacheFile, resp.Body)
if err != nil {
return nil, err
}
// Reset file pointer and decode the image
_, err = cacheFile.Seek(0, 0)
if err != nil {
return nil, err
}
img, err := jpeg.Decode(cacheFile)
if err != nil {
return nil, err
}
return img, nil
}
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