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package output
import (
"context"
"fmt"
"io"
"github.com/Backblaze/blazer/b2"
"github.com/SayaAndy/saya-today-thumbnail-generator/config"
)
var _ OutputClient = (*B2OutputClient)(nil)
type B2OutputClient struct {
prefix string
bucket *b2.Bucket
b2cl *b2.Client
}
func NewB2OutputClient(cfg *config.OutputConfig) (*B2OutputClient, error) {
if cfg.Storage.Type != "b2" {
return nil, fmt.Errorf("invalid storage type for B2OutputClient")
}
b2cfg := cfg.Storage.Config.(*config.B2Config)
b2cl, err := b2.NewClient(context.Background(), b2cfg.KeyID, b2cfg.ApplicationKey)
if err != nil {
return nil, err
}
bucket, err := b2cl.Bucket(context.Background(), b2cfg.BucketName)
if err != nil {
return nil, err
}
return &B2OutputClient{b2cl: b2cl, bucket: bucket, prefix: b2cfg.Prefix}, nil
}
func (c *B2OutputClient) GetWriter(path string) (io.Writer, error) {
obj := c.bucket.Object(c.prefix + path)
if obj == nil {
return nil, fmt.Errorf("failed to reference object in B2 bucket")
}
return obj.NewWriter(context.Background()), nil
}
func (c *B2OutputClient) ReadMetadata(path string) (map[string]string, error) {
obj := c.bucket.Object(c.prefix + path)
if obj == nil {
return nil, fmt.Errorf("failed to reference object in B2 bucket")
}
attrs, err := obj.Attrs(context.Background())
if err != nil {
return nil, fmt.Errorf("get attributes for object: %w", err)
}
metadata := attrs.Info
metadata["Name"] = attrs.Name
metadata["Size"] = fmt.Sprintf("%d", attrs.Size)
metadata["ContentType"] = attrs.ContentType
metadata["LastModified"] = attrs.LastModified.Format("2006-01-02T15:04:05Z")
metadata["SHA1"] = attrs.SHA1
metadata["UploadTimestamp"] = attrs.UploadTimestamp.Format("2006-01-02T15:04:05Z")
switch attrs.Status {
case b2.Uploaded:
metadata["Status"] = "Uploaded"
case b2.Folder:
metadata["Status"] = "Folder"
case b2.Hider:
metadata["Status"] = "Hider"
case b2.Started:
metadata["Status"] = "Started"
default:
metadata["Status"] = "Unknown"
}
return metadata, nil
}
func (c *B2OutputClient) IsMissing(path string) (bool, error) {
obj := c.bucket.Object(c.prefix + path)
if obj == nil {
return false, fmt.Errorf("failed to reference object in B2 bucket")
}
attrs, err := obj.Attrs(context.Background())
if err != nil {
return true, fmt.Errorf("get attributes for object: %w", err)
}
return attrs.Status == b2.Hider, nil
}
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