109 lines
1.9 KiB
Go
109 lines
1.9 KiB
Go
// Package iso8583 provides a iso8583 codec
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package iso8583 // import "go.unistack.org/micro-codec-iso8583/v3"
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import (
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"fmt"
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"io"
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"github.com/moov-io/iso8583"
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"go.unistack.org/micro/v3/codec"
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)
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type iso8583Codec struct {
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opts codec.Options
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}
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var _ codec.Codec = &iso8583Codec{}
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func (c *iso8583Codec) Marshal(v interface{}, opts ...codec.Option) ([]byte, error) {
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if v == nil {
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return nil, nil
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}
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options := c.opts
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for _, o := range opts {
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o(&options)
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}
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if m, ok := v.(*codec.Frame); ok {
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return m.Data, nil
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}
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return nil, nil
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}
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func (c *iso8583Codec) Unmarshal(b []byte, v interface{}, opts ...codec.Option) error {
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if len(b) == 0 || v == nil {
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return nil
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}
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options := c.opts
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for _, o := range opts {
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o(&options)
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}
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if m, ok := v.(*codec.Frame); ok {
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m.Data = b
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return nil
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}
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var spec *iso8583.MessageSpec
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if options.Context != nil {
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if v, ok := options.Context.Value(specKey{}).(*iso8583.MessageSpec); ok {
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spec = v
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}
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}
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if spec == nil {
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return fmt.Errorf("missing spec option")
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}
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message := iso8583.NewMessage(spec)
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err := message.Unpack(b)
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if err != nil {
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return err
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}
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return message.Unmarshal(v)
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}
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func (c *iso8583Codec) ReadHeader(conn io.Reader, m *codec.Message, t codec.MessageType) error {
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return nil
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}
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func (c *iso8583Codec) ReadBody(conn io.Reader, v interface{}) error {
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if v == nil {
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return nil
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}
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buf, err := io.ReadAll(conn)
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if err != nil {
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return err
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} else if len(buf) == 0 {
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return nil
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}
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return c.Unmarshal(buf, v)
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}
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func (c *iso8583Codec) Write(conn io.Writer, m *codec.Message, v interface{}) error {
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if v == nil {
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return nil
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}
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buf, err := c.Marshal(v)
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if err != nil {
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return err
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}
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_, err = conn.Write(buf)
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return err
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}
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func (c *iso8583Codec) String() string {
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return "iso8583"
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}
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func NewCodec(opts ...codec.Option) *iso8583Codec {
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return &iso8583Codec{opts: codec.NewOptions(opts...)}
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}
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