73 lines
1.3 KiB
Go
73 lines
1.3 KiB
Go
package command
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import (
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"io"
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"strconv"
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"strings"
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pk "github.com/Tnze/go-mc/net/packet"
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)
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type StringParser struct {
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Format int32
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V string
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}
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func (s StringParser) WriteTo(w io.Writer) (int64, error) {
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return pk.Tuple{
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pk.Identifier("brigadier:string"),
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pk.VarInt(s.Format),
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}.WriteTo(w)
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}
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func (s StringParser) Parse(cmd string) (token string, value interface{}, err error) {
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switch s.Format {
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case 2: // Greedy Phrase
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return cmd, cmd, nil
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case 1: // Quotable Phrase
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if len(cmd) > 0 && cmd[0] == '"' {
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var sb strings.Builder
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var isEscaping bool
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for i, v := range cmd[1:] {
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if isEscaping {
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isEscaping = false
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switch v {
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case '\\':
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sb.WriteRune('\\')
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case '"':
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sb.WriteRune('"')
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}
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} else if v == '\\' {
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isEscaping = true
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} else if v == '"' {
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return cmd[:i], sb.String(), nil
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} else {
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sb.WriteRune(v)
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}
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}
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return "", nil, ParseErr{
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Pos: len(cmd) - 1,
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Err: "expected '\"'",
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}
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}
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fallthrough
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case 0: // Single Word
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i := strings.IndexAny(cmd, "\t\n\v\f\r ")
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if i == -1 {
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return cmd, cmd, nil
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}
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return cmd[:i], cmd[:i], nil
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default:
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panic("StringParser: unknown format 0x" + strconv.FormatInt(int64(s.Format), 16))
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}
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}
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type ParseErr struct {
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Pos int
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Err string
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}
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func (p ParseErr) Error() string {
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return p.Err
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}
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