89 lines
1.7 KiB
Go
89 lines
1.7 KiB
Go
package babashka
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import (
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"bufio"
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"encoding/json"
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"os"
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"github.com/jackpal/bencode-go"
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)
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type Message struct {
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Op string
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Id string
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Args string
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Var string
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}
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type Namespace struct {
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Name string "name"
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Vars []Var "vars"
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}
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type Var struct {
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Name string "name"
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Code string `bencode:"code,omitempty"`
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}
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type DescribeResponse struct {
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Format string "format"
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Namespaces []Namespace "namespaces"
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}
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type InvokeResponse struct {
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Id string "id"
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Value string "value" // stringified json response
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Status []string "status"
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}
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type ErrorResponse struct {
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Id string "id"
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Status []string "status"
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ExMessage string "ex-message"
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ExData string "ex-data"
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}
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func ReadMessage() (*Message, error) {
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reader := bufio.NewReader(os.Stdin)
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message := &Message{}
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if err := bencode.Unmarshal(reader, &message); err != nil {
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return nil, err
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}
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return message, nil
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}
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func WriteDescribeResponse(describeResponse *DescribeResponse) {
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writeResponse(*describeResponse)
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}
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func WriteInvokeResponse(inputMessage *Message, value any) error {
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if value == nil {
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return nil
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}
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resultValue, err := json.Marshal(value)
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if err != nil {
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return err
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}
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response := InvokeResponse{Id: inputMessage.Id, Status: []string{"done"}, Value: string(resultValue)}
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writeResponse(response)
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return nil
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}
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func WriteErrorResponse(inputMessage *Message, err error) {
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errorResponse := ErrorResponse{Id: inputMessage.Id, Status: []string{"done", "error"}, ExMessage: err.Error()}
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writeResponse(errorResponse)
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}
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func writeResponse(response any) error {
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writer := bufio.NewWriter(os.Stdout)
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if err := bencode.Marshal(writer, response); err != nil {
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return err
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}
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writer.Flush()
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return nil
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}
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