gomuks/matrix/matrix.go

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// gomuks - A terminal Matrix client 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 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package matrix
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"os"
"path"
"path/filepath"
"regexp"
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"strings"
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"time"
"gopkg.in/russross/blackfriday.v2"
"maunium.net/go/gomatrix"
"maunium.net/go/gomuks/config"
"maunium.net/go/gomuks/debug"
"maunium.net/go/gomuks/interface"
"maunium.net/go/gomuks/lib/bfhtml"
"maunium.net/go/gomuks/matrix/pushrules"
"maunium.net/go/gomuks/matrix/rooms"
)
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// Container is a wrapper for a gomatrix Client and some other stuff.
//
// It is used for all Matrix calls from the UI and Matrix event handlers.
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type Container struct {
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client *gomatrix.Client
syncer *GomuksSyncer
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gmx ifc.Gomuks
ui ifc.GomuksUI
config *config.Config
running bool
stop chan bool
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typing int64
}
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// NewContainer creates a new Container for the given Gomuks instance.
func NewContainer(gmx ifc.Gomuks) *Container {
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c := &Container{
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config: gmx.Config(),
ui: gmx.UI(),
gmx: gmx,
}
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return c
}
// Client returns the underlying gomatrix Client.
func (c *Container) Client() *gomatrix.Client {
return c.client
}
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// InitClient initializes the gomatrix client and connects to the homeserver specified in the config.
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func (c *Container) InitClient() error {
if len(c.config.HS) == 0 {
return fmt.Errorf("no homeserver in config")
}
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if c.client != nil {
c.Stop()
c.client = nil
}
var mxid, accessToken string
if c.config.Session != nil {
accessToken = c.config.Session.AccessToken
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mxid = c.config.UserID
}
var err error
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c.client, err = gomatrix.NewClient(c.config.HS, mxid, accessToken)
if err != nil {
return err
}
c.stop = make(chan bool, 1)
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if c.config.Session != nil && len(accessToken) > 0 {
go c.Start()
}
return nil
}
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// Initialized returns whether or not the gomatrix client is initialized (see InitClient())
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func (c *Container) Initialized() bool {
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return c.client != nil
}
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// Login sends a password login request with the given username and password.
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func (c *Container) Login(user, password string) error {
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resp, err := c.client.Login(&gomatrix.ReqLogin{
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Type: "m.login.password",
User: user,
Password: password,
InitialDeviceDisplayName: "gomuks",
})
if err != nil {
return err
}
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c.client.SetCredentials(resp.UserID, resp.AccessToken)
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c.config.UserID = resp.UserID
c.config.Save()
c.config.Session = c.config.NewSession(resp.UserID)
c.config.Session.AccessToken = resp.AccessToken
c.config.Session.Save()
go c.Start()
return nil
}
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// Stop stops the Matrix syncer.
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func (c *Container) Stop() {
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if c.running {
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debug.Print("Stopping Matrix container...")
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c.stop <- true
c.client.StopSync()
}
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}
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// UpdatePushRules fetches the push notification rules from the server and stores them in the current Session object.
func (c *Container) UpdatePushRules() {
debug.Print("Updating push rules...")
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resp, err := pushrules.GetPushRules(c.client)
if err != nil {
debug.Print("Failed to fetch push rules:", err)
}
c.config.Session.PushRules = resp
}
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// PushRules returns the push notification rules. If no push rules are cached, UpdatePushRules() will be called first.
func (c *Container) PushRules() *pushrules.PushRuleset {
if c.config.Session.PushRules == nil {
c.UpdatePushRules()
}
return c.config.Session.PushRules
}
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// OnLogout stops the syncer and moves the UI back to the login view.
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func (c *Container) OnLogout() {
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c.ui.OnLogout()
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c.Stop()
}
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// OnLogin initializes the syncer and updates the room list.
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func (c *Container) OnLogin() {
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c.ui.OnLogin()
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c.client.Store = c.config.Session
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debug.Print("Initializing syncer")
c.syncer = NewGomuksSyncer(c.config.Session)
c.syncer.OnEventType("m.room.message", c.HandleMessage)
c.syncer.OnEventType("m.room.member", c.HandleMembership)
c.syncer.OnEventType("m.typing", c.HandleTyping)
c.syncer.OnEventType("m.push_rules", c.HandlePushRules)
c.syncer.OnEventType("m.tag", c.HandleTag)
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c.syncer.InitDoneCallback = func() {
c.config.Session.InitialSyncDone = true
c.ui.Render()
}
c.client.Syncer = c.syncer
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debug.Print("Setting existing rooms")
c.ui.MainView().SetRooms(c.config.Session.Rooms)
debug.Print("OnLogin() done.")
}
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// Start moves the UI to the main view, calls OnLogin() and runs the syncer forever until stopped with Stop()
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func (c *Container) Start() {
defer debug.Recover()
c.OnLogin()
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if c.client == nil {
return
}
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debug.Print("Starting sync...")
c.running = true
for {
select {
case <-c.stop:
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debug.Print("Stopping sync...")
c.running = false
return
default:
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if err := c.client.Sync(); err != nil {
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debug.Print("Sync() errored", err)
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} else {
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debug.Print("Sync() returned without error")
}
}
}
}
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// HandleMessage is the event handler for the m.room.message timeline event.
func (c *Container) HandleMessage(source EventSource, evt *gomatrix.Event) {
if source == EventSourceLeave {
return
}
mainView := c.ui.MainView()
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roomView := mainView.GetRoom(evt.RoomID)
if roomView == nil {
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debug.Printf("Failed to handle event %v: No room view found.", evt)
return
}
message := mainView.ParseEvent(roomView, evt)
if message != nil {
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roomView.AddMessage(message, ifc.AppendMessage)
if c.syncer.FirstSyncDone {
pushRules := c.PushRules().GetActions(roomView.MxRoom(), evt).Should()
mainView.NotifyMessage(roomView.MxRoom(), message, pushRules)
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c.ui.Render()
}
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} else {
debug.Printf("Parsing event %v failed (ParseEvent() returned nil).", evt)
}
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}
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// HandlePushRules is the event handler for the m.push_rules account data event.
func (c *Container) HandlePushRules(source EventSource, evt *gomatrix.Event) {
debug.Print("Received updated push rules")
var err error
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c.config.Session.PushRules, err = pushrules.EventToPushRules(evt)
if err != nil {
debug.Print("Failed to convert event to push rules:", err)
}
}
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// HandleTag is the event handler for the m.tag account data event.
func (c *Container) HandleTag(source EventSource, evt *gomatrix.Event) {
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room := c.config.Session.GetRoom(evt.RoomID)
tags, _ := evt.Content["tags"].(map[string]interface{})
newTags := make([]rooms.RoomTag, len(tags))
index := 0
for tag, infoifc := range tags {
info, _ := infoifc.(map[string]interface{})
order := "0.5"
rawOrder, ok := info["order"]
if ok {
order = fmt.Sprintf("%v", rawOrder)
}
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newTags[index] = rooms.RoomTag{
Tag: tag,
Order: order,
}
index++
}
mainView := c.ui.MainView()
mainView.UpdateTags(room, newTags)
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}
func (c *Container) processOwnMembershipChange(evt *gomatrix.Event) {
membership, _ := evt.Content["membership"].(string)
prevMembership := "leave"
if evt.Unsigned.PrevContent != nil {
prevMembership, _ = evt.Unsigned.PrevContent["membership"].(string)
}
debug.Printf("Processing own membership change: %s->%s in %s", prevMembership, membership, evt.RoomID)
if membership == prevMembership {
return
}
room := c.GetRoom(evt.RoomID)
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switch membership {
case "join":
c.ui.MainView().AddRoom(room)
room.HasLeft = false
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case "leave":
c.ui.MainView().RemoveRoom(room)
room.HasLeft = true
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case "invite":
// TODO handle
debug.Printf("%s invited the user to %s", evt.Sender, evt.RoomID)
}
}
// HandleMembership is the event handler for the m.room.member state event.
func (c *Container) HandleMembership(source EventSource, evt *gomatrix.Event) {
if !c.config.Session.InitialSyncDone && source == EventSourceLeave {
return
} else if evt.StateKey != nil && *evt.StateKey == c.config.Session.UserID {
c.processOwnMembershipChange(evt)
} else if !c.config.Session.InitialSyncDone || source == EventSourceLeave {
// We don't care about other users' membership events in the initial sync or chats we've left.
return
}
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mainView := c.ui.MainView()
roomView := mainView.GetRoom(evt.RoomID)
if roomView == nil {
return
}
message := mainView.ParseEvent(roomView, evt)
if message != nil {
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roomView.AddMessage(message, ifc.AppendMessage)
// We don't want notifications at startup.
if c.syncer.FirstSyncDone {
pushRules := c.PushRules().GetActions(roomView.MxRoom(), evt).Should()
mainView.NotifyMessage(roomView.MxRoom(), message, pushRules)
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c.ui.Render()
}
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}
}
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// HandleTyping is the event handler for the m.typing event.
func (c *Container) HandleTyping(source EventSource, evt *gomatrix.Event) {
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users := evt.Content["user_ids"].([]interface{})
strUsers := make([]string, len(users))
for i, user := range users {
strUsers[i] = user.(string)
}
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c.ui.MainView().SetTyping(evt.RoomID, strUsers)
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}
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// SendMessage sends a message with the given text to the given room.
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func (c *Container) SendMessage(roomID, msgtype, text string) (string, error) {
defer debug.Recover()
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c.SendTyping(roomID, false)
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resp, err := c.client.SendMessageEvent(roomID, "m.room.message",
gomatrix.TextMessage{MsgType: msgtype, Body: text})
if err != nil {
return "", err
}
return resp.EventID, nil
}
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func (c *Container) renderMarkdown(text string) string {
parser := blackfriday.New(
blackfriday.WithExtensions(blackfriday.NoIntraEmphasis |
blackfriday.Tables |
blackfriday.FencedCode |
blackfriday.Strikethrough |
blackfriday.SpaceHeadings |
blackfriday.DefinitionLists))
ast := parser.Parse([]byte(text))
renderer := bfhtml.HTMLRenderer{
HTMLRenderer: blackfriday.NewHTMLRenderer(blackfriday.HTMLRendererParameters{
Flags: blackfriday.UseXHTML,
}),
}
var buf strings.Builder
renderer.RenderHeader(&buf, ast)
ast.Walk(func(node *blackfriday.Node, entering bool) blackfriday.WalkStatus {
return renderer.RenderNode(&buf, node, entering)
})
renderer.RenderFooter(&buf, ast)
return buf.String()
}
var mentionRegex = regexp.MustCompile("\\[(.+?)]\\(https://matrix.to/#/@.+?:.+?\\)")
var roomRegex = regexp.MustCompile("\\[.+?]\\(https://matrix.to/#/(#.+?:[^/]+?)\\)")
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// SendMarkdownMessage sends a message with the given text to the given room.
//
// If the given text contains markdown formatting symbols, it will be rendered into HTML before sending.
// Otherwise, it will be sent as plain text.
func (c *Container) SendMarkdownMessage(roomID, msgtype, text string) (string, error) {
defer debug.Recover()
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html := c.renderMarkdown(text)
if html == text {
return c.SendMessage(roomID, msgtype, text)
}
// Remove markdown link stuff from plaintext mentions and room links
text = mentionRegex.ReplaceAllString(text, "$1")
text = roomRegex.ReplaceAllString(text, "$1")
c.SendTyping(roomID, false)
resp, err := c.client.SendMessageEvent(roomID, "m.room.message",
map[string]interface{}{
"msgtype": msgtype,
"body": text,
"format": "org.matrix.custom.html",
"formatted_body": html,
})
if err != nil {
return "", err
}
return resp.EventID, nil
}
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// SendTyping sets whether or not the user is typing in the given room.
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func (c *Container) SendTyping(roomID string, typing bool) {
defer debug.Recover()
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ts := time.Now().Unix()
if c.typing > ts && typing {
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return
}
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if typing {
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c.client.UserTyping(roomID, true, 20000)
c.typing = ts + 15
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} else {
c.client.UserTyping(roomID, false, 0)
c.typing = 0
}
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}
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// JoinRoom makes the current user try to join the given room.
func (c *Container) JoinRoom(roomID string) (*rooms.Room, error) {
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if len(roomID) == 0 {
return nil, fmt.Errorf("invalid room ID")
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}
server := ""
if roomID[0] == '!' {
server = roomID[strings.Index(roomID, ":")+1:]
}
resp, err := c.client.JoinRoom(roomID, server, nil)
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if err != nil {
return nil, err
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}
room := c.GetRoom(resp.RoomID)
room.HasLeft = false
return room, nil
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}
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// LeaveRoom makes the current user leave the given room.
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func (c *Container) LeaveRoom(roomID string) error {
if len(roomID) == 0 {
return fmt.Errorf("invalid room ID")
}
_, err := c.client.LeaveRoom(roomID)
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if err != nil {
return err
}
room := c.GetRoom(roomID)
room.HasLeft = true
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return nil
}
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// GetHistory fetches room history.
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func (c *Container) GetHistory(roomID, prevBatch string, limit int) ([]gomatrix.Event, string, error) {
resp, err := c.client.Messages(roomID, prevBatch, "", 'b', limit)
if err != nil {
return nil, "", err
}
return resp.Chunk, resp.End, nil
}
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// GetRoom gets the room instance stored in the session.
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func (c *Container) GetRoom(roomID string) *rooms.Room {
return c.config.Session.GetRoom(roomID)
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}
var mxcRegex = regexp.MustCompile("mxc://(.+)/(.+)")
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// Download fetches the given Matrix content (mxc) URL and returns the data, homeserver, file ID and potential errors.
//
// The file will be either read from the media cache (if found) or downloaded from the server.
func (c *Container) Download(mxcURL string) (data []byte, hs, id string, err error) {
parts := mxcRegex.FindStringSubmatch(mxcURL)
if parts == nil || len(parts) != 3 {
err = fmt.Errorf("invalid matrix content URL")
return
}
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hs = parts[1]
id = parts[2]
cacheFile := c.GetCachePath(hs, id)
if _, err = os.Stat(cacheFile); err != nil {
data, err = ioutil.ReadFile(cacheFile)
if err == nil {
return
}
}
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data, err = c.download(hs, id, cacheFile)
return
}
func (c *Container) download(hs, id, cacheFile string) (data []byte, err error) {
dlURL, _ := url.Parse(c.client.HomeserverURL.String())
dlURL.Path = path.Join(dlURL.Path, "/_matrix/media/v1/download", hs, id)
var resp *http.Response
resp, err = c.client.Client.Get(dlURL.String())
if err != nil {
return
}
defer resp.Body.Close()
var buf bytes.Buffer
_, err = io.Copy(&buf, resp.Body)
if err != nil {
return
}
data = buf.Bytes()
err = ioutil.WriteFile(cacheFile, data, 0600)
return
}
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// GetCachePath gets the path to the cached version of the given homeserver:fileID combination.
// The file may or may not exist, use Download() to ensure it has been cached.
func (c *Container) GetCachePath(homeserver, fileID string) string {
dir := filepath.Join(c.config.MediaDir, homeserver)
err := os.MkdirAll(dir, 0700)
if err != nil {
return ""
}
return filepath.Join(dir, fileID)
}