portal/metadata/metadata.go

140 lines
3.0 KiB
Go

package metadata
import (
"context"
"encoding/hex"
"errors"
"time"
"git.lumeweb.com/LumeWeb/portal/db/models"
"go.uber.org/fx"
"gorm.io/gorm"
)
var ErrNotFound = gorm.ErrRecordNotFound
type UploadMetadata struct {
UserID uint `json:"userId"`
Hash []byte `json:"hash"`
MimeType string `json:"mimeType"`
Protocol string `json:"protocol"`
UploaderIP string `json:"uploaderIp"`
Size uint64 `json:"size"`
Created time.Time `json:"created"`
}
func (u UploadMetadata) IsEmpty() bool {
if u.UserID != 0 || u.MimeType != "" || u.Protocol != "" || u.UploaderIP != "" || u.Size != 0 {
return false
}
if !u.Created.IsZero() {
return false
}
if len(u.Hash) != 0 {
return false
}
return true
}
var Module = fx.Module("metadata",
fx.Provide(
fx.Annotate(
NewMetadataService,
fx.As(new(MetadataService)),
),
),
)
type MetadataService interface {
SaveUpload(ctx context.Context, metadata UploadMetadata) error
GetUpload(ctx context.Context, objectHash []byte) (UploadMetadata, error)
DeleteUpload(ctx context.Context, objectHash []byte) error
}
type MetadataServiceDefault struct {
db *gorm.DB
}
type MetadataServiceParams struct {
fx.In
Db *gorm.DB
}
func NewMetadataService(params MetadataServiceParams) *MetadataServiceDefault {
return &MetadataServiceDefault{
db: params.Db,
}
}
func (m *MetadataServiceDefault) SaveUpload(ctx context.Context, metadata UploadMetadata) error {
var upload models.Upload
upload.Hash = hex.EncodeToString(metadata.Hash)
ret := m.db.WithContext(ctx).Model(&models.Upload{}).Where(&upload).First(&upload)
if ret.Error != nil {
if !errors.Is(ret.Error, gorm.ErrRecordNotFound) {
return ret.Error
}
}
if ret.RowsAffected > 0 {
return nil
}
upload.UserID = metadata.UserID
upload.MimeType = metadata.MimeType
upload.Protocol = metadata.Protocol
upload.UploaderIP = metadata.UploaderIP
upload.Size = metadata.Size
return m.db.Save(&metadata).Error
}
func (m *MetadataServiceDefault) GetUpload(ctx context.Context, objectHash []byte) (UploadMetadata, error) {
var upload models.Upload
upload.Hash = hex.EncodeToString(objectHash)
ret := m.db.WithContext(ctx).Model(&models.Upload{}).Where(&upload).First(&upload)
if ret.Error != nil {
if errors.Is(ret.Error, gorm.ErrRecordNotFound) {
return UploadMetadata{}, ret.Error
}
}
hash, err := hex.DecodeString(upload.Hash)
if err != nil {
return UploadMetadata{}, err
}
return UploadMetadata{
UserID: upload.UserID,
Hash: hash,
MimeType: upload.MimeType,
Protocol: upload.Protocol,
UploaderIP: upload.UploaderIP,
Size: upload.Size,
}, nil
}
func (m *MetadataServiceDefault) DeleteUpload(ctx context.Context, objectHash []byte) error {
var upload models.Upload
upload.Hash = hex.EncodeToString(objectHash)
ret := m.db.WithContext(ctx).Model(&models.Upload{}).Where(&upload).First(&upload)
if ret.Error != nil {
return ret.Error
}
return m.db.Delete(&upload).Error
}