maubot/matrix/matrix.go
2018-09-21 00:35:24 +03:00

188 lines
5.4 KiB
Go

// maubot - A plugin-based Matrix bot system written in Go.
// Copyright (C) 2018 Tulir Asokan
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
package matrix
import (
"fmt"
"maubot.xyz"
"maubot.xyz/database"
"maunium.net/go/gomatrix"
"maunium.net/go/gomatrix/format"
log "maunium.net/go/maulogger"
)
type Client struct {
*gomatrix.Client
syncer *MaubotSyncer
handlers map[string][]maubot.CommandHandler
commands []*ParsedCommand
DB *database.MatrixClient
}
func NewClient(db *database.MatrixClient) (*Client, error) {
mxClient, err := gomatrix.NewClient(db.Homeserver, db.UserID, db.AccessToken)
if err != nil {
return nil, err
}
client := &Client{
Client: mxClient,
handlers: make(map[string][]maubot.CommandHandler),
commands: ParseSpec(db.Commands()),
DB: db,
}
client.syncer = NewMaubotSyncer(client, client.Store)
client.Client.Syncer = client.syncer
client.AddEventHandler(gomatrix.StateMember, client.onJoin)
client.AddEventHandler(gomatrix.EventMessage, client.onMessage)
return client, nil
}
func (client *Client) Proxy(owner string) *ClientProxy {
return &ClientProxy{
hiddenClient: client,
owner: owner,
}
}
func (client *Client) AddEventHandler(evt gomatrix.EventType, handler maubot.EventHandler) {
client.syncer.OnEventType(evt, func(evt *maubot.Event) maubot.EventHandlerResult {
if evt.Sender == client.UserID {
return maubot.StopEventPropagation
}
return handler(evt)
})
}
func (client *Client) AddCommandHandler(owner, evt string, handler maubot.CommandHandler) {
log.Debugln("Registering command handler for event", evt, "by", owner)
list, ok := client.handlers[evt]
if !ok {
list = []maubot.CommandHandler{handler}
} else {
list = append(list, handler)
}
client.handlers[evt] = list
}
func (client *Client) SetCommandSpec(owner string, spec *maubot.CommandSpec) {
log.Debugln("Registering command spec for", owner, "on", client.UserID)
changed := client.DB.SetCommandSpec(owner, spec)
if changed {
client.commands = ParseSpec(client.DB.Commands())
log.Debugln("Command spec of", owner, "on", client.UserID, "updated.")
}
}
func (client *Client) GetEvent(roomID, eventID string) *maubot.Event {
evt, err := client.Client.GetEvent(roomID, eventID)
if err != nil {
log.Warnf("Failed to get event %s @ %s: %v\n", eventID, roomID, err)
return nil
}
return client.ParseEvent(evt)
}
func (client *Client) TriggerCommand(command *ParsedCommand, evt *maubot.Event) maubot.CommandHandlerResult {
handlers, ok := client.handlers[command.Name]
if !ok {
log.Warnf("Command %s triggered by %s doesn't have any handlers.\n", command.Name, evt.Sender)
return maubot.Continue
}
log.Debugf("Command %s on client %s triggered by %s\n", command.Name, client.UserID, evt.Sender)
for _, handler := range handlers {
result := handler(evt)
if result == maubot.StopCommandPropagation {
break
} else if result != maubot.Continue {
return result
}
}
return maubot.Continue
}
func (client *Client) onMessage(evt *maubot.Event) maubot.EventHandlerResult {
for _, command := range client.commands {
if command.Match(evt.Event) {
return client.TriggerCommand(command, evt)
}
}
return maubot.Continue
}
func (client *Client) onJoin(evt *maubot.Event) maubot.EventHandlerResult {
if client.DB.AutoJoinRooms && evt.GetStateKey() == client.DB.UserID && evt.Content.Membership == "invite" {
client.JoinRoom(evt.RoomID)
return maubot.StopEventPropagation
}
return maubot.Continue
}
func (client *Client) JoinRoom(roomID string) (resp *gomatrix.RespJoinRoom, err error) {
return client.Client.JoinRoom(roomID, "", nil)
}
func (client *Client) SendMessage(roomID, text string) (string, error) {
return client.SendContent(roomID, format.RenderMarkdown(text))
}
func (client *Client) SendMessagef(roomID, text string, args ...interface{}) (string, error) {
return client.SendContent(roomID, format.RenderMarkdown(fmt.Sprintf(text, args...)))
}
func (client *Client) SendContent(roomID string, content gomatrix.Content) (string, error) {
return client.SendMessageEvent(roomID, gomatrix.EventMessage, content)
}
func (client *Client) SendMessageEvent(roomID string, evtType gomatrix.EventType, content interface{}) (string, error) {
resp, err := client.Client.SendMessageEvent(roomID, evtType, content)
if err != nil {
return "", err
}
return resp.EventID, nil
}
func (client *Client) Sync() {
go func() {
err := client.Client.Sync()
if err != nil {
log.Errorln("Sync() in client", client.UserID, "errored:", err)
}
}()
}
type hiddenClient = Client
type ClientProxy struct {
*hiddenClient
owner string
}
func (cp *ClientProxy) AddCommandHandler(evt string, handler maubot.CommandHandler) {
cp.hiddenClient.AddCommandHandler(cp.owner, evt, handler)
}
func (cp *ClientProxy) SetCommandSpec(spec *maubot.CommandSpec) {
cp.hiddenClient.SetCommandSpec(cp.owner, spec)
}