Add suport for parsing unicode characters (#86)

go.mod

@@ -11,6 +11,7 @@ require (
 	github.com/gorilla/websocket v1.4.0 // indirect
 	github.com/martinusso/go-docs v0.0.0-20161215163720-81905d575a58 // indirect
 	github.com/mattn/go-shellwords v1.0.3
+	github.com/mozillazg/go-unidecode v0.1.0
 	github.com/nlopes/slack v0.4.0
 	github.com/pkg/errors v0.8.0 // indirect
 	github.com/pyinx/gorocket v0.0.0-20170810024322-78ae1353729f

go.sum

@@ -18,6 +18,8 @@ github.com/martinusso/go-docs v0.0.0-20161215163720-81905d575a58 h1:VmcrkkMjTdCG
 github.com/martinusso/go-docs v0.0.0-20161215163720-81905d575a58/go.mod h1:QymHbiLXXhrSGV5xTWYfEBt9mau3hHwVOT9Y7tpolJU=
 github.com/mattn/go-shellwords v1.0.3 h1:K/VxK7SZ+cvuPgFSLKi5QPI9Vr/ipOf4C1gN+ntueUk=
 github.com/mattn/go-shellwords v1.0.3/go.mod h1:3xCvwCdWdlDJUrvuMn7Wuy9eWs4pE8vqg+NOMyg4B2o=
+github.com/mozillazg/go-unidecode v0.1.0 h1:wAIMDf/yTexXKxT5TkctLwmClGSyuoJaZDRMclFNq8U=
+github.com/mozillazg/go-unidecode v0.1.0/go.mod h1:fYMdhyjni9ZeEmS6OE/GJHDLsF8TQvIVDwYR/drR26Q=
 github.com/nlopes/slack v0.4.0 h1:OVnHm7lv5gGT5gkcHsZAyw++oHVFihbjWbL3UceUpiA=
 github.com/nlopes/slack v0.4.0/go.mod h1:jVI4BBK3lSktibKahxBF74txcK2vyvkza1z/+rRnVAM=
 github.com/pkg/errors v0.8.0 h1:WdK/asTD0HN+q6hsWO3/vpuAkAr+tw6aNJNDFFf0+qw=

parser.go

@@ -6,6 +6,7 @@ import (
 	"strings"
 
 	"github.com/mattn/go-shellwords"
+	unidecode "github.com/mozillazg/go-unidecode"
 )
 
 var (
@@ -35,12 +36,12 @@ func parse(s string, channel *ChannelData, user *User) (*Cmd, error) {
 
 	// get the command
 	pieces := strings.SplitN(c.Message, " ", 2)
-	c.Command = strings.ToLower(pieces[0])
+	c.Command = strings.ToLower(unidecode.Unidecode(pieces[0]))
 
 	if len(pieces) > 1 {
 		// get the arguments and remove extra spaces
 		c.RawArgs = strings.TrimSpace(pieces[1])
-		parsedArgs, err := shellwords.Parse(c.RawArgs)
+		parsedArgs, err := shellwords.Parse(unidecode.Unidecode(c.RawArgs))
 		if err != nil {
 			return nil, errors.New("Error parsing arguments: " + err.Error())
 		}

parser_test.go

@@ -14,6 +14,8 @@ func TestParser(t *testing.T) {
 	cmdMixedCaseWithoutArgs := CmdPrefix + "Cmd"
 	cmdMixedCaseWithArgs := CmdPrefix + "Cmd    arg1  arg2   "
 	cmdMixedCaseWithQuotes := CmdPrefix + "Cmd    \"arg1  arg2\""
+	cmdUnicode := CmdPrefix + "Çmd"
+	cmdUnicodeWithArgs := CmdPrefix + "çмд årg1 årg2"
 
 	tests := []struct {
 		msg      string
@@ -84,6 +86,26 @@ func TestParser(t *testing.T) {
 			Args:        []string{"arg1  arg2"},
 			MessageData: &Message{Text: strings.TrimLeft("Cmd    \"arg1  arg2\"", CmdPrefix)},
 		}},
+		{cmdUnicode, &Cmd{
+			Raw:         cmdUnicode,
+			Command:     "cmd",
+			Channel:     channel.Channel,
+			ChannelData: channel,
+			User:        user,
+			Message:     "Çmd",
+			MessageData: &Message{Text: strings.TrimLeft("Çmd", CmdPrefix)},
+		}},
+		{cmdUnicodeWithArgs, &Cmd{
+			Raw:         cmdUnicodeWithArgs,
+			Command:     "cmd",
+			Channel:     channel.Channel,
+			ChannelData: channel,
+			User:        user,
+			Message:     "çмд årg1 årg2",
+			RawArgs:     "årg1 årg2",
+			Args:        []string{"arg1", "arg2"},
+			MessageData: &Message{Text: strings.TrimLeft("çмд årg1 årg2", CmdPrefix)},
+		}},
 	}
 
 	for _, test := range tests {