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|
package config
import (
"encoding/json"
"fmt"
"log/slog"
"os"
"github.com/go-playground/validator/v10"
)
type Config struct {
Input InputConfig `json:"Input" validate:"required"`
Converters []ConverterConfig `json:"Converters" validate:"required"`
MaxProcessThreads int `json:"MaxProcessThreads" validate:"required,min=1"`
MaxPreProcessThreads int `json:"MaxPreProcessThreads" validate:"min=1;gtefield=MaxProcessThreads"`
LogLevel slog.Level `json:"LogLevel" validate:"required"`
}
type InputConfig struct {
Storage InputStorageConfig `json:"Storage" validate:"required"`
KnownExtensions []string `json:"KnownExtensions" validate:"required,min=0,dive,min=1"`
CacheProcessed bool `json:"CacheProcessed"`
CacheProcessedCsvPath string `json:"CacheProcessedCsvPath" validate:"filepath"`
}
type InputStorageConfig struct {
Type string `json:"Type" validate:"required,oneof=b2 s3 local-unix"`
Config any `json:"Config" validate:"required"`
}
func (sc *InputStorageConfig) UnmarshalJSON(data []byte) error {
var tmp struct {
Type string `json:"Type"`
Config json.RawMessage `json:"Config"`
}
if err := json.Unmarshal(data, &tmp); err != nil {
return err
}
sc.Type = tmp.Type
switch tmp.Type {
case "b2":
var b2Config B2Config
if err := json.Unmarshal(tmp.Config, &b2Config); err != nil {
return fmt.Errorf("unmarshal B2Config: %w", err)
}
sc.Config = &b2Config
case "s3":
var s3Config S3Config
if err := json.Unmarshal(tmp.Config, &s3Config); err != nil {
return fmt.Errorf("unmarshal S3Config: %w", err)
}
sc.Config = &s3Config
case "local-unix":
var localUnixConfig InputLocalUnixConfig
if err := json.Unmarshal(tmp.Config, &localUnixConfig); err != nil {
return fmt.Errorf("unmarshal LocalUnixConfig: %w", err)
}
sc.Config = &localUnixConfig
default:
return fmt.Errorf("unsupported storage type: %s", tmp.Type)
}
return nil
}
type ConverterConfig struct {
Type string `json:"Type" validate:"required,oneof=webp jpeg"`
Config any `json:"Config" validate:"required"`
Output OutputConfig `json:"Output" validate:"required"`
}
func (pc *ConverterConfig) UnmarshalJSON(data []byte) error {
var tmp struct {
Type string `json:"Type"`
Config json.RawMessage `json:"Config"`
Output OutputConfig `json:"Output"`
}
if err := json.Unmarshal(data, &tmp); err != nil {
return err
}
pc.Type = tmp.Type
pc.Output = tmp.Output
switch tmp.Type {
case "webp":
var webpConfig WebpConfig
if err := json.Unmarshal(tmp.Config, &webpConfig); err != nil {
return fmt.Errorf("unmarshal WebpConfig: %w", err)
}
pc.Config = &webpConfig
case "jpeg":
var jpegConfig JpegConfig
if err := json.Unmarshal(tmp.Config, &jpegConfig); err != nil {
return fmt.Errorf("unmarshal JpegConfig: %w", err)
}
pc.Config = &jpegConfig
default:
return fmt.Errorf("unsupported storage type: %s", tmp.Type)
}
return nil
}
type WebpConfig struct {
Quality int `json:"Quality" validate:"required,min=1,max=100"`
Size SizeConfig `json:"Size"`
}
type JpegConfig struct {
ExtensionName string `json:"ExtensionName" validate:"alpha"`
Quality int `json:"Quality" validate:"required,min=1,max=100"`
Size SizeConfig `json:"Size"`
}
type SizeConfig struct {
MaxWidth int `json:"MaxWidth"`
MaxHeight int `json:"MaxHeight"`
}
type OutputStorageConfig struct {
Type string `json:"Type" validate:"required,oneof=b2 s3 local-unix"`
Config any `json:"Config" validate:"required"`
}
func (sc *OutputStorageConfig) UnmarshalJSON(data []byte) error {
var tmp struct {
Type string `json:"Type"`
Config json.RawMessage `json:"Config"`
}
if err := json.Unmarshal(data, &tmp); err != nil {
return err
}
sc.Type = tmp.Type
switch tmp.Type {
case "b2":
var b2Config B2Config
if err := json.Unmarshal(tmp.Config, &b2Config); err != nil {
return fmt.Errorf("unmarshal B2Config: %w", err)
}
sc.Config = &b2Config
case "s3":
var s3Config S3Config
if err := json.Unmarshal(tmp.Config, &s3Config); err != nil {
return fmt.Errorf("unmarshal S3Config: %w", err)
}
sc.Config = &s3Config
case "local-unix":
var localUnixConfig OutputLocalUnixConfig
if err := json.Unmarshal(tmp.Config, &localUnixConfig); err != nil {
return fmt.Errorf("unmarshal LocalUnixConfig: %w", err)
}
sc.Config = &localUnixConfig
default:
return fmt.Errorf("unsupported storage type: %s", tmp.Type)
}
return nil
}
type B2Config struct {
BucketName string `json:"BucketName" validate:"required,min=1"`
Region string `json:"Region" validate:"required,min=1"`
Prefix string `json:"Prefix"`
KeyID string `json:"KeyID"`
ApplicationKey string `json:"ApplicationKey"`
}
type S3Config struct {
BucketName string `json:"BucketName" validate:"required,min=1"`
Region string `json:"Region" validate:"required,min=1"`
Prefix string `json:"Prefix"`
Endpoint string `json:"Endpoint"`
UsePathStyle bool `json:"UsePathStyle"`
AccessKeyID string `json:"AccessKeyID"`
SecretAccessKey string `json:"SecretAccessKey"`
}
type InputLocalUnixConfig struct {
MaxDepth int `json:"MaxDepth" validate:"required,min=0"`
Path string `json:"Path" validate:"required,min=1"`
}
type OutputConfig struct {
RewriteOn string `json:"RewriteOn" validate:"oneof=Never UnequalHashInCache Always"`
Storage OutputStorageConfig `json:"Storage" validate:"required"`
}
type OutputLocalUnixConfig struct {
Path string `json:"Path" validate:"required,min=1,dirpath"`
DirPermissionMode string `json:"DirPermissionMode" validate:"required,min=3"`
FilePermissionMode string `json:"FilePermissionMode" validate:"required,min=3"`
AttributesImplementation string `json:"AttributesImplementation" validate:"required,oneof=xattr none"`
}
func LoadConfig(path string, config *Config) error {
fileBytes, err := os.ReadFile(path)
if err != nil {
return err
}
expandedFileBytes := []byte(os.ExpandEnv(string(fileBytes)))
if err = json.Unmarshal(expandedFileBytes, config); err != nil {
return err
}
for i := range config.Converters {
if config.Converters[i].Output.RewriteOn == "" {
config.Converters[i].Output.RewriteOn = "UnequalHashInCache"
}
}
return nil
}
func InitConfig(path string) (*Config, error) {
config := &Config{}
if err := LoadConfig(path, config); err != nil {
return nil, err
}
validate := validator.New(validator.WithRequiredStructEnabled())
if err := validate.Struct(config); err != nil {
return nil, err
}
return config, nil
}
|
