50 lines
922 B
Go
50 lines
922 B
Go
// Copyright (c) 2021 Shivaram Lingamneni
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// Released under the MIT License
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package ircutils
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import (
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"strings"
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"unicode"
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"unicode/utf8"
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"github.com/ergochat/irc-go/ircmsg"
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)
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var TruncateUTF8Safe = ircmsg.TruncateUTF8Safe
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// Sanitizes human-readable text to make it safe for IRC;
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// assumes UTF-8 and uses the replacement character where
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// applicable.
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func SanitizeText(message string, byteLimit int) (result string) {
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var buf strings.Builder
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for _, r := range message {
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if r == '\x00' || r == '\r' {
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continue
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} else if r == '\n' {
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if buf.Len()+2 <= byteLimit {
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buf.WriteString(" ")
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continue
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} else {
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break
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}
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} else if unicode.IsSpace(r) {
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if buf.Len()+1 <= byteLimit {
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buf.WriteString(" ")
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} else {
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break
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}
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} else {
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rLen := utf8.RuneLen(r)
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if buf.Len()+rLen <= byteLimit {
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buf.WriteRune(r)
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} else {
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break
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}
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}
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}
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return buf.String()
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}
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