forked from shazow/ssh-chat
/
message.go
264 lines (220 loc) · 4.6 KB
/
message.go
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package message
import (
"fmt"
"strings"
"time"
)
// Message is an interface for messages.
type Message interface {
Render(*Theme) string
String() string
Command() string
Timestamp() time.Time
}
type MessageTo interface {
Message
To() *User
}
type MessageFrom interface {
Message
From() *User
}
func ParseInput(body string, from *User) Message {
m := NewPublicMsg(body, from)
cmd, isCmd := m.ParseCommand()
if isCmd {
return cmd
}
return m
}
// Msg is a base type for other message types.
type Msg struct {
body string
timestamp time.Time
// TODO: themeCache *map[*Theme]string
}
func NewMsg(body string) *Msg {
return &Msg{
body: body,
timestamp: time.Now(),
}
}
// Render message based on a theme.
func (m Msg) Render(t *Theme) string {
// TODO: Render based on theme
// TODO: Cache based on theme
return m.String()
}
func (m Msg) String() string {
return m.body
}
func (m Msg) Command() string {
return ""
}
func (m Msg) Timestamp() time.Time {
return m.timestamp
}
// PublicMsg is any message from a user sent to the room.
type PublicMsg struct {
Msg
from *User
}
func NewPublicMsg(body string, from *User) PublicMsg {
return PublicMsg{
Msg: Msg{
body: body,
timestamp: time.Now(),
},
from: from,
}
}
func (m PublicMsg) From() *User {
return m.from
}
func (m PublicMsg) ParseCommand() (*CommandMsg, bool) {
// Check if the message is a command
if !strings.HasPrefix(m.body, "/") {
return nil, false
}
// Parse
// TODO: Handle quoted fields properly
fields := strings.Fields(m.body)
command, args := fields[0], fields[1:]
msg := CommandMsg{
PublicMsg: m,
command: command,
args: args,
}
return &msg, true
}
func (m PublicMsg) Render(t *Theme) string {
if t == nil {
return m.String()
}
return fmt.Sprintf("%s: %s", t.ColorName(m.from), m.body)
}
func (m PublicMsg) RenderFor(cfg UserConfig) string {
if cfg.Highlight == nil || cfg.Theme == nil {
return m.Render(cfg.Theme)
}
if !cfg.Highlight.MatchString(m.body) {
return m.Render(cfg.Theme)
}
body := cfg.Highlight.ReplaceAllString(m.body, cfg.Theme.Highlight("${1}"))
if cfg.Bell {
body += Bel
}
return fmt.Sprintf("%s: %s", cfg.Theme.ColorName(m.from), body)
}
func (m PublicMsg) String() string {
return fmt.Sprintf("%s: %s", m.from.Name(), m.body)
}
// EmoteMsg is a /me message sent to the room. It specifically does not
// extend PublicMsg because it doesn't implement MessageFrom to allow the
// sender to see the emote.
type EmoteMsg struct {
Msg
from *User
}
func NewEmoteMsg(body string, from *User) *EmoteMsg {
return &EmoteMsg{
Msg: Msg{
body: body,
timestamp: time.Now(),
},
from: from,
}
}
func (m EmoteMsg) Render(t *Theme) string {
return fmt.Sprintf("** %s %s", m.from.Name(), m.body)
}
func (m EmoteMsg) String() string {
return m.Render(nil)
}
// PrivateMsg is a message sent to another user, not shown to anyone else.
type PrivateMsg struct {
PublicMsg
to *User
}
func NewPrivateMsg(body string, from *User, to *User) PrivateMsg {
return PrivateMsg{
PublicMsg: NewPublicMsg(body, from),
to: to,
}
}
func (m PrivateMsg) To() *User {
return m.to
}
func (m PrivateMsg) Render(t *Theme) string {
s := fmt.Sprintf("[PM from %s] %s", m.from.Name(), m.body)
if t == nil {
return s
}
return t.ColorPM(s)
}
func (m PrivateMsg) String() string {
return m.Render(nil)
}
// SystemMsg is a response sent from the server directly to a user, not shown
// to anyone else. Usually in response to something, like /help.
type SystemMsg struct {
Msg
to *User
}
func NewSystemMsg(body string, to *User) *SystemMsg {
return &SystemMsg{
Msg: Msg{
body: body,
timestamp: time.Now(),
},
to: to,
}
}
func (m *SystemMsg) Render(t *Theme) string {
if t == nil {
return m.String()
}
return t.ColorSys(m.String())
}
func (m *SystemMsg) String() string {
return fmt.Sprintf("-> %s", m.body)
}
func (m *SystemMsg) To() *User {
return m.to
}
// AnnounceMsg is a message sent from the server to everyone, like a join or
// leave event.
type AnnounceMsg struct {
Msg
}
func NewAnnounceMsg(body string) *AnnounceMsg {
return &AnnounceMsg{
Msg: Msg{
body: body,
timestamp: time.Now(),
},
}
}
func (m AnnounceMsg) Render(t *Theme) string {
if t == nil {
return m.String()
}
return t.ColorSys(m.String())
}
func (m AnnounceMsg) String() string {
return fmt.Sprintf(" * %s", m.body)
}
type CommandMsg struct {
PublicMsg
command string
args []string
}
func (m CommandMsg) Command() string {
return m.command
}
func (m CommandMsg) Args() []string {
return m.args
}
func (m CommandMsg) Body() string {
return m.body
}