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package object
import (
"fmt"
"codeberg.org/lindenii/furgit/object/blob"
"codeberg.org/lindenii/furgit/object/commit"
"codeberg.org/lindenii/furgit/object/header"
"codeberg.org/lindenii/furgit/object/id"
"codeberg.org/lindenii/furgit/object/typ"
// "codeberg.org/lindenii/furgit/object/tag"
// "codeberg.org/lindenii/furgit/object/tree"
)
// SizeMismatchError indicates a mismatch
// between the size expected from the object header
// and the size of the object.
type SizeMismatchError struct {
Expected int
Got int
}
func (sizeMismatchError SizeMismatchError) Error() string {
return fmt.Sprintf(
"object: size mismatch: header says %d bytes, but got %d from body",
sizeMismatchError.Expected, sizeMismatchError.Got,
)
}
// ParseWithHeader parses a loose object
// in "type size\x00body" format.
//
//nolint:ireturn
func ParseWithHeader(raw []byte, algo id.Algorithm) (Object, error) {
ty, size, headerLen, err := header.Parse(raw)
if err != nil {
return nil, err
}
body := raw[headerLen:]
if uint64(len(body)) != size {
return nil, SizeMismatchError{Expected: int(size), Got: len(body)}
}
return ParseWithoutHeader(ty, body, algo)
}
// ParseWithoutHeader parses a typed object body.
//
//nolint:ireturn
func ParseWithoutHeader(ty typ.Type, body []byte, algo id.Algorithm) (Object, error) {
switch ty {
case typ.TypeBlob:
return blob.Parse(body) //nolint:wrapcheck
case typ.TypeTree:
panic("TODO")
case typ.TypeCommit:
return commit.Parse(body, algo) //nolint:wrapcheck
case typ.TypeTag:
panic("TODO")
default:
return nil, typ.ErrInvalidType
}
}
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