Files
pocket-id-pocket-id-2/backend/internal/bootstrap/app_images_bootstrap.go
2025-09-20 21:42:52 +02:00

121 lines
3.2 KiB
Go

package bootstrap
import (
"bytes"
"encoding/hex"
"fmt"
"log/slog"
"os"
"path"
"github.com/pocket-id/pocket-id/backend/internal/common"
"github.com/pocket-id/pocket-id/backend/internal/utils"
"github.com/pocket-id/pocket-id/backend/resources"
)
// initApplicationImages copies the images from the images directory to the application-images directory
// and returns a map containing the detected file extensions in the application-images directory.
func initApplicationImages() (map[string]string, error) {
// Previous versions of images
// If these are found, they are deleted
legacyImageHashes := imageHashMap{
"background.jpg": mustDecodeHex("138d510030ed845d1d74de34658acabff562d306476454369a60ab8ade31933f"),
}
dirPath := common.EnvConfig.UploadPath + "/application-images"
sourceFiles, err := resources.FS.ReadDir("images")
if err != nil && !os.IsNotExist(err) {
return nil, fmt.Errorf("failed to read directory: %w", err)
}
destinationFiles, err := os.ReadDir(dirPath)
if err != nil && !os.IsNotExist(err) {
return nil, fmt.Errorf("failed to read directory: %w", err)
}
dstNameToExt := make(map[string]string, len(destinationFiles))
for _, f := range destinationFiles {
if f.IsDir() {
continue
}
name := f.Name()
nameWithoutExt, ext := utils.SplitFileName(name)
destFilePath := path.Join(dirPath, name)
// Skip directories
if f.IsDir() {
continue
}
h, err := utils.CreateSha256FileHash(destFilePath)
if err != nil {
slog.Warn("Failed to get hash for file", slog.String("name", name), slog.Any("error", err))
continue
}
// Check if the file is a legacy one - if so, delete it
if legacyImageHashes.Contains(h) {
slog.Info("Found legacy application image that will be removed", slog.String("name", name))
err = os.Remove(destFilePath)
if err != nil {
return nil, fmt.Errorf("failed to remove legacy file '%s': %w", name, err)
}
continue
}
// Track existing files
dstNameToExt[nameWithoutExt] = ext
}
// Copy images from the images directory to the application-images directory if they don't already exist
for _, sourceFile := range sourceFiles {
if sourceFile.IsDir() {
continue
}
name := sourceFile.Name()
nameWithoutExt, ext := utils.SplitFileName(name)
srcFilePath := path.Join("images", name)
destFilePath := path.Join(dirPath, name)
// Skip if there's already an image at the path
// We do not check the extension because users could have uploaded a different one
if _, exists := dstNameToExt[nameWithoutExt]; exists {
continue
}
slog.Info("Writing new application image", slog.String("name", name))
err := utils.CopyEmbeddedFileToDisk(srcFilePath, destFilePath)
if err != nil {
return nil, fmt.Errorf("failed to copy file: %w", err)
}
// Track the newly copied file so it can be included in the extensions map later
dstNameToExt[nameWithoutExt] = ext
}
return dstNameToExt, nil
}
type imageHashMap map[string][]byte
func (m imageHashMap) Contains(target []byte) bool {
if len(target) == 0 {
return false
}
for _, h := range m {
if bytes.Equal(h, target) {
return true
}
}
return false
}
func mustDecodeHex(str string) []byte {
b, err := hex.DecodeString(str)
if err != nil {
panic(err)
}
return b
}