gomuks/matrix/matrix.go
2020-02-20 21:56:03 +02:00

960 lines
26 KiB
Go

// gomuks - A terminal Matrix client written in Go.
// Copyright (C) 2019 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 (
"bytes"
"context"
"crypto/tls"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"os"
"path"
"path/filepath"
"regexp"
"runtime"
dbg "runtime/debug"
"time"
"github.com/pkg/errors"
"maunium.net/go/gomuks/lib/open"
"maunium.net/go/gomuks/matrix/event"
"maunium.net/go/mautrix"
"maunium.net/go/mautrix/format"
"maunium.net/go/gomuks/config"
"maunium.net/go/gomuks/debug"
"maunium.net/go/gomuks/interface"
"maunium.net/go/gomuks/matrix/pushrules"
"maunium.net/go/gomuks/matrix/rooms"
)
// Container is a wrapper for a mautrix Client and some other stuff.
//
// It is used for all Matrix calls from the UI and Matrix event handlers.
type Container struct {
client *mautrix.Client
syncer *GomuksSyncer
gmx ifc.Gomuks
ui ifc.GomuksUI
config *config.Config
history *HistoryManager
running bool
stop chan bool
typing int64
}
// NewContainer creates a new Container for the given Gomuks instance.
func NewContainer(gmx ifc.Gomuks) *Container {
c := &Container{
config: gmx.Config(),
ui: gmx.UI(),
gmx: gmx,
}
return c
}
// Client returns the underlying mautrix Client.
func (c *Container) Client() *mautrix.Client {
return c.client
}
type mxLogger struct{}
func (log mxLogger) Debugfln(message string, args ...interface{}) {
debug.Printf("[Matrix] "+message, args...)
}
// InitClient initializes the mautrix client and connects to the homeserver specified in the config.
func (c *Container) InitClient() error {
if len(c.config.HS) == 0 {
return fmt.Errorf("no homeserver entered")
}
if c.client != nil {
c.Stop()
c.client = nil
}
var mxid, accessToken string
if len(c.config.AccessToken) > 0 {
accessToken = c.config.AccessToken
mxid = c.config.UserID
}
var err error
c.client, err = mautrix.NewClient(c.config.HS, mxid, accessToken)
if err != nil {
return err
}
c.client.Logger = mxLogger{}
if c.history == nil {
c.history, err = NewHistoryManager(c.config.HistoryPath)
if err != nil {
return errors.Wrap(err, "failed to initialize history")
}
}
allowInsecure := len(os.Getenv("GOMUKS_ALLOW_INSECURE_CONNECTIONS")) > 0
if allowInsecure {
c.client.Client = &http.Client{
Transport: &http.Transport{TLSClientConfig: &tls.Config{InsecureSkipVerify: true}},
}
}
c.stop = make(chan bool, 1)
if len(accessToken) > 0 {
go c.Start()
}
return nil
}
// Initialized returns whether or not the mautrix client is initialized (see InitClient())
func (c *Container) Initialized() bool {
return c.client != nil
}
func (c *Container) PasswordLogin(user, password string) error {
resp, err := c.client.Login(&mautrix.ReqLogin{
Type: "m.login.password",
Identifier: mautrix.UserIdentifier{
Type: "m.id.user",
User: user,
},
Password: password,
InitialDeviceDisplayName: "gomuks",
})
if err != nil {
return err
}
c.finishLogin(resp)
return nil
}
func (c *Container) finishLogin(resp *mautrix.RespLogin) {
c.client.SetCredentials(resp.UserID, resp.AccessToken)
c.config.UserID = resp.UserID
c.config.AccessToken = resp.AccessToken
c.config.Save()
go c.Start()
}
func respondHTML(w http.ResponseWriter, status int, message string) {
w.Header().Add("Content-Type", "text/html")
w.WriteHeader(status)
_, _ = w.Write([]byte(fmt.Sprintf(`<!DOCTYPE html>
<html>
<head>
<title>gomuks single-sign on</title>
<meta charset="utf-8"/>
</head>
<body>
<center>
<h2>%s</h2>
</center>
</body>
</html>`, message)))
}
func (c *Container) SingleSignOn() error {
loginURL := c.client.BuildURLWithQuery([]string{"login", "sso", "redirect"}, map[string]string{
"redirectUrl": "http://localhost:29325",
})
err := open.Open(loginURL)
if err != nil {
return err
}
errChan := make(chan error, 1)
server := &http.Server{Addr: ":29325"}
server.Handler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
loginToken := r.URL.Query().Get("loginToken")
if len(loginToken) == 0 {
respondHTML(w, http.StatusBadRequest, "Missing loginToken parameter")
return
}
resp, err := c.client.Login(&mautrix.ReqLogin{
Type: "m.login.token",
Token: loginToken,
InitialDeviceDisplayName: "gomuks",
})
if err != nil {
respondHTML(w, http.StatusForbidden, err.Error())
errChan <- err
return
}
respondHTML(w, http.StatusOK, fmt.Sprintf("Successfully logged in as %s", resp.UserID))
c.finishLogin(resp)
go func() {
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
err = server.Shutdown(ctx)
if err != nil {
debug.Printf("Failed to shut down SSO server: %v\n", err)
}
errChan <- err
}()
})
err = server.ListenAndServe()
if err != nil {
return err
}
err = <-errChan
return err
}
// Login sends a password login request with the given username and password.
func (c *Container) Login(user, password string) error {
resp, err := c.client.GetLoginFlows()
if err != nil {
return err
}
if len(resp.Flows) == 1 && resp.Flows[0].Type == "m.login.password" {
return c.PasswordLogin(user, password)
} else if len(resp.Flows) == 2 && resp.Flows[0].Type == "m.login.sso" && resp.Flows[1].Type == "m.login.token" {
return c.SingleSignOn()
} else {
return fmt.Errorf("no supported login flows")
}
}
// Logout revokes the access token, stops the syncer and calls the OnLogout() method of the UI.
func (c *Container) Logout() {
c.client.Logout()
c.config.DeleteSession()
c.Stop()
c.client = nil
c.ui.OnLogout()
}
// Stop stops the Matrix syncer.
func (c *Container) Stop() {
if c.running {
debug.Print("Stopping Matrix container...")
c.stop <- true
c.client.StopSync()
debug.Print("Closing history manager...")
err := c.history.Close()
if err != nil {
debug.Print("Error closing history manager:", err)
}
c.history = nil
}
}
// 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...")
resp, err := pushrules.GetPushRules(c.client)
if err != nil {
debug.Print("Failed to fetch push rules:", err)
c.config.PushRules = &pushrules.PushRuleset{}
} else {
c.config.PushRules = resp
}
c.config.SavePushRules()
}
// 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.PushRules == nil {
c.UpdatePushRules()
}
return c.config.PushRules
}
var AccountDataGomuksPreferences = mautrix.NewEventType("net.maunium.gomuks.preferences")
// OnLogin initializes the syncer and updates the room list.
func (c *Container) OnLogin() {
c.ui.OnLogin()
c.client.Store = c.config
debug.Print("Initializing syncer")
c.syncer = NewGomuksSyncer(c.config)
c.syncer.OnEventType(mautrix.EventMessage, c.HandleMessage)
c.syncer.OnEventType(mautrix.EventEncrypted, c.HandleMessage)
c.syncer.OnEventType(mautrix.EventSticker, c.HandleMessage)
c.syncer.OnEventType(mautrix.EventReaction, c.HandleMessage)
c.syncer.OnEventType(mautrix.EventRedaction, c.HandleRedaction)
c.syncer.OnEventType(mautrix.StateAliases, c.HandleMessage)
c.syncer.OnEventType(mautrix.StateCanonicalAlias, c.HandleMessage)
c.syncer.OnEventType(mautrix.StateTopic, c.HandleMessage)
c.syncer.OnEventType(mautrix.StateRoomName, c.HandleMessage)
c.syncer.OnEventType(mautrix.StateMember, c.HandleMembership)
c.syncer.OnEventType(mautrix.EphemeralEventReceipt, c.HandleReadReceipt)
c.syncer.OnEventType(mautrix.EphemeralEventTyping, c.HandleTyping)
c.syncer.OnEventType(mautrix.AccountDataDirectChats, c.HandleDirectChatInfo)
c.syncer.OnEventType(mautrix.AccountDataPushRules, c.HandlePushRules)
c.syncer.OnEventType(mautrix.AccountDataRoomTags, c.HandleTag)
c.syncer.OnEventType(AccountDataGomuksPreferences, c.HandlePreferences)
c.syncer.InitDoneCallback = func() {
debug.Print("Initial sync done")
c.config.AuthCache.InitialSyncDone = true
debug.Print("Updating title caches")
for _, room := range c.config.Rooms.Map {
room.GetTitle()
}
debug.Print("Cleaning cached rooms from memory")
c.config.Rooms.ForceClean()
debug.Print("Saving all data")
c.config.SaveAll()
debug.Print("Adding rooms to UI")
c.ui.MainView().SetRooms(c.config.Rooms)
c.ui.Render()
// The initial sync can be a bit heavy, so we force run the GC here
// after cleaning up rooms from memory above.
debug.Print("Running GC")
runtime.GC()
dbg.FreeOSMemory()
}
c.client.Syncer = c.syncer
debug.Print("Setting existing rooms")
c.ui.MainView().SetRooms(c.config.Rooms)
debug.Print("OnLogin() done.")
}
// Start moves the UI to the main view, calls OnLogin() and runs the syncer forever until stopped with Stop()
func (c *Container) Start() {
defer debug.Recover()
c.OnLogin()
if c.client == nil {
return
}
debug.Print("Starting sync...")
c.running = true
for {
select {
case <-c.stop:
debug.Print("Stopping sync...")
c.running = false
return
default:
if err := c.client.Sync(); err != nil {
if httpErr, ok := err.(mautrix.HTTPError); ok && httpErr.Code == http.StatusUnauthorized {
debug.Print("Sync() errored with ", err, " -> logging out")
c.Logout()
} else {
debug.Print("Sync() errored", err)
}
} else {
debug.Print("Sync() returned without error")
}
}
}
}
func (c *Container) HandlePreferences(source EventSource, evt *mautrix.Event) {
if source&EventSourceAccountData == 0 {
return
}
orig := c.config.Preferences
err := json.Unmarshal(evt.Content.VeryRaw, &c.config.Preferences)
if err != nil {
debug.Print("Failed to parse updated preferences:", err)
return
}
debug.Print("Updated preferences:", orig, "->", c.config.Preferences)
if c.config.AuthCache.InitialSyncDone {
c.ui.HandleNewPreferences()
}
}
func (c *Container) SendPreferencesToMatrix() {
defer debug.Recover()
debug.Print("Sending updated preferences:", c.config.Preferences)
u := c.client.BuildURL("user", c.config.UserID, "account_data", "net.maunium.gomuks.preferences")
_, err := c.client.MakeRequest("PUT", u, &c.config.Preferences, nil)
if err != nil {
debug.Print("Failed to update preferences:", err)
}
}
func (c *Container) HandleRedaction(source EventSource, evt *mautrix.Event) {
room := c.GetOrCreateRoom(evt.RoomID)
var redactedEvt *event.Event
err := c.history.Update(room, evt.Redacts, func(redacted *event.Event) error {
redacted.Unsigned.RedactedBy = evt.ID
redacted.Unsigned.RedactedBecause = evt
redactedEvt = redacted
return nil
})
if err != nil {
debug.Print("Failed to mark", evt.Redacts, "as redacted:", err)
return
} else if !c.config.AuthCache.InitialSyncDone || !room.Loaded() {
return
}
roomView := c.ui.MainView().GetRoom(evt.RoomID)
if roomView == nil {
debug.Printf("Failed to handle event %v: No room view found.", evt)
return
}
roomView.AddRedaction(redactedEvt)
if c.syncer.FirstSyncDone {
c.ui.Render()
}
}
func (c *Container) HandleEdit(room *rooms.Room, editsID string, editEvent *event.Event) {
var origEvt *event.Event
err := c.history.Update(room, editsID, func(evt *event.Event) error {
evt.Gomuks.Edits = append(evt.Gomuks.Edits, editEvent)
origEvt = evt
return nil
})
if err != nil {
debug.Print("Failed to store edit in history db:", err)
return
} else if !c.config.AuthCache.InitialSyncDone || !room.Loaded() {
return
}
roomView := c.ui.MainView().GetRoom(editEvent.RoomID)
if roomView == nil {
debug.Printf("Failed to handle edit event %v: No room view found.", editEvent)
return
}
roomView.AddEdit(origEvt)
if c.syncer.FirstSyncDone {
c.ui.Render()
}
}
func (c *Container) HandleReaction(room *rooms.Room, reactsTo string, reactEvent *event.Event) {
rel := reactEvent.Content.GetRelatesTo()
var origEvt *event.Event
err := c.history.Update(room, reactsTo, func(evt *event.Event) error {
if evt.Unsigned.Relations.Annotations.Map == nil {
evt.Unsigned.Relations.Annotations.Map = make(map[string]int)
}
val, _ := evt.Unsigned.Relations.Annotations.Map[rel.Key]
evt.Unsigned.Relations.Annotations.Map[rel.Key] = val + 1
origEvt = evt
return nil
})
if err != nil {
debug.Print("Failed to store reaction in history db:", err)
return
} else if !c.config.AuthCache.InitialSyncDone || !room.Loaded() {
return
}
roomView := c.ui.MainView().GetRoom(reactEvent.RoomID)
if roomView == nil {
debug.Printf("Failed to handle edit event %v: No room view found.", reactEvent)
return
}
roomView.AddReaction(origEvt, rel.Key)
if c.syncer.FirstSyncDone {
c.ui.Render()
}
}
// HandleMessage is the event handler for the m.room.message timeline event.
func (c *Container) HandleMessage(source EventSource, mxEvent *mautrix.Event) {
room := c.GetOrCreateRoom(mxEvent.RoomID)
if source&EventSourceLeave != 0 {
room.HasLeft = true
return
} else if source&EventSourceState != 0 {
return
}
if editID := mxEvent.Content.GetRelatesTo().GetReplaceID(); len(editID) > 0 {
c.HandleEdit(room, editID, event.Wrap(mxEvent))
return
} else if reactionID := mxEvent.Content.GetRelatesTo().GetAnnotationID(); mxEvent.Type == mautrix.EventReaction && len(reactionID) > 0 {
c.HandleReaction(room, reactionID, event.Wrap(mxEvent))
return
}
events, err := c.history.Append(room, []*mautrix.Event{mxEvent})
if err != nil {
debug.Printf("Failed to add event %s to history: %v", mxEvent.ID, err)
}
evt := events[0]
if !c.config.AuthCache.InitialSyncDone {
room.LastReceivedMessage = time.Unix(evt.Timestamp/1000, evt.Timestamp%1000*1000)
return
}
mainView := c.ui.MainView()
roomView := mainView.GetRoom(evt.RoomID)
if roomView == nil {
debug.Printf("Failed to handle event %v: No room view found.", evt)
return
}
if !room.Loaded() {
pushRules := c.PushRules().GetActions(room, evt.Event).Should()
shouldNotify := pushRules.Notify || !pushRules.NotifySpecified
if !shouldNotify {
room.LastReceivedMessage = time.Unix(evt.Timestamp/1000, evt.Timestamp%1000*1000)
room.AddUnread(evt.ID, shouldNotify, pushRules.Highlight)
mainView.Bump(room)
return
}
}
message := roomView.AddEvent(evt)
if message != nil {
roomView.MxRoom().LastReceivedMessage = message.Time()
if c.syncer.FirstSyncDone {
pushRules := c.PushRules().GetActions(roomView.MxRoom(), evt.Event).Should()
mainView.NotifyMessage(roomView.MxRoom(), message, pushRules)
c.ui.Render()
}
} else {
debug.Printf("Parsing event %s type %s %v from %s in %s failed (ParseEvent() returned nil).", evt.ID, evt.Type.String(), evt.Content.Raw, evt.Sender, evt.RoomID)
}
}
// HandleMembership is the event handler for the m.room.member state event.
func (c *Container) HandleMembership(source EventSource, evt *mautrix.Event) {
isLeave := source&EventSourceLeave != 0
isTimeline := source&EventSourceTimeline != 0
if isLeave {
c.GetOrCreateRoom(evt.RoomID).HasLeft = true
}
isNonTimelineLeave := isLeave && !isTimeline
if !c.config.AuthCache.InitialSyncDone && isNonTimelineLeave {
return
} else if evt.StateKey != nil && *evt.StateKey == c.config.UserID {
c.processOwnMembershipChange(evt)
} else if !isTimeline && (!c.config.AuthCache.InitialSyncDone || isLeave) {
// We don't care about other users' membership events in the initial sync or chats we've left.
return
}
c.HandleMessage(source, evt)
}
func (c *Container) processOwnMembershipChange(evt *mautrix.Event) {
membership := evt.Content.Membership
prevMembership := mautrix.MembershipLeave
if evt.Unsigned.PrevContent != nil {
prevMembership = evt.Unsigned.PrevContent.Membership
}
debug.Printf("Processing own membership change: %s->%s in %s", prevMembership, membership, evt.RoomID)
if membership == prevMembership {
return
}
room := c.GetRoom(evt.RoomID)
switch membership {
case "join":
if c.config.AuthCache.InitialSyncDone {
c.ui.MainView().AddRoom(room)
}
room.HasLeft = false
case "leave":
if c.config.AuthCache.InitialSyncDone {
c.ui.MainView().RemoveRoom(room)
}
room.HasLeft = true
room.Unload()
case "invite":
// TODO handle
debug.Printf("%s invited the user to %s", evt.Sender, evt.RoomID)
}
}
func (c *Container) parseReadReceipt(evt *mautrix.Event) (largestTimestampEvent string) {
var largestTimestamp int64
for eventID, rawContent := range evt.Content.Raw {
content, ok := rawContent.(map[string]interface{})
if !ok {
continue
}
mRead, ok := content["m.read"].(map[string]interface{})
if !ok {
continue
}
myInfo, ok := mRead[c.config.UserID].(map[string]interface{})
if !ok {
continue
}
ts, ok := myInfo["ts"].(float64)
if int64(ts) > largestTimestamp {
largestTimestamp = int64(ts)
largestTimestampEvent = eventID
}
}
return
}
func (c *Container) HandleReadReceipt(source EventSource, evt *mautrix.Event) {
if source&EventSourceLeave != 0 {
return
}
lastReadEvent := c.parseReadReceipt(evt)
if len(lastReadEvent) == 0 {
return
}
room := c.GetRoom(evt.RoomID)
if room != nil {
room.MarkRead(lastReadEvent)
if c.config.AuthCache.InitialSyncDone {
c.ui.Render()
}
}
}
func (c *Container) parseDirectChatInfo(evt *mautrix.Event) map[*rooms.Room]bool {
directChats := make(map[*rooms.Room]bool)
for _, rawRoomIDList := range evt.Content.Raw {
roomIDList, ok := rawRoomIDList.([]interface{})
if !ok {
continue
}
for _, rawRoomID := range roomIDList {
roomID, ok := rawRoomID.(string)
if !ok {
continue
}
room := c.GetOrCreateRoom(roomID)
if room != nil && !room.HasLeft {
directChats[room] = true
}
}
}
return directChats
}
func (c *Container) HandleDirectChatInfo(source EventSource, evt *mautrix.Event) {
directChats := c.parseDirectChatInfo(evt)
for _, room := range c.config.Rooms.Map {
shouldBeDirect := directChats[room]
if shouldBeDirect != room.IsDirect {
room.IsDirect = shouldBeDirect
if c.config.AuthCache.InitialSyncDone {
c.ui.MainView().UpdateTags(room)
}
}
}
}
// HandlePushRules is the event handler for the m.push_rules account data event.
func (c *Container) HandlePushRules(source EventSource, evt *mautrix.Event) {
debug.Print("Received updated push rules")
var err error
c.config.PushRules, err = pushrules.EventToPushRules(evt)
if err != nil {
debug.Print("Failed to convert event to push rules:", err)
return
}
c.config.SavePushRules()
}
// HandleTag is the event handler for the m.tag account data event.
func (c *Container) HandleTag(source EventSource, evt *mautrix.Event) {
room := c.GetOrCreateRoom(evt.RoomID)
newTags := make([]rooms.RoomTag, len(evt.Content.RoomTags))
index := 0
for tag, info := range evt.Content.RoomTags {
order := "0.5"
if len(info.Order) > 0 {
order = info.Order.String()
}
newTags[index] = rooms.RoomTag{
Tag: tag,
Order: order,
}
index++
}
room.RawTags = newTags
if c.config.AuthCache.InitialSyncDone {
mainView := c.ui.MainView()
mainView.UpdateTags(room)
}
}
// HandleTyping is the event handler for the m.typing event.
func (c *Container) HandleTyping(source EventSource, evt *mautrix.Event) {
if !c.config.AuthCache.InitialSyncDone {
return
}
c.ui.MainView().SetTyping(evt.RoomID, evt.Content.TypingUserIDs)
}
func (c *Container) MarkRead(roomID, eventID string) {
urlPath := c.client.BuildURL("rooms", roomID, "receipt", "m.read", eventID)
c.client.MakeRequest("POST", urlPath, struct{}{}, nil)
}
var mentionRegex = regexp.MustCompile("\\[(.+?)]\\(https://matrix.to/#/@.+?:.+?\\)")
var roomRegex = regexp.MustCompile("\\[.+?]\\(https://matrix.to/#/(#.+?:[^/]+?)\\)")
func (c *Container) PrepareMarkdownMessage(roomID string, msgtype mautrix.MessageType, text string, edit *event.Event) *event.Event {
content := format.RenderMarkdown(text)
content.MsgType = msgtype
// Remove markdown link stuff from plaintext mentions and room links
content.Body = mentionRegex.ReplaceAllString(content.Body, "$1")
content.Body = roomRegex.ReplaceAllString(content.Body, "$1")
if edit != nil {
contentCopy := content
content.NewContent = &contentCopy
content.Body = "* " + content.Body
if len(content.FormattedBody) > 0 {
content.FormattedBody = "* " + content.FormattedBody
}
content.RelatesTo = &mautrix.RelatesTo{
Type: mautrix.RelReplace,
EventID: edit.ID,
}
}
txnID := c.client.TxnID()
localEcho := event.Wrap(&mautrix.Event{
ID: txnID,
Sender: c.config.UserID,
Type: mautrix.EventMessage,
Timestamp: time.Now().UnixNano() / 1e6,
RoomID: roomID,
Content: content,
Unsigned: mautrix.Unsigned{
TransactionID: txnID,
},
})
localEcho.Gomuks.OutgoingState = event.StateLocalEcho
if edit != nil {
localEcho.ID = edit.ID
localEcho.Gomuks.Edits = []*event.Event{localEcho}
}
return localEcho
}
// SendMarkdownMessage sends a message with the given markdown text to the given room.
func (c *Container) SendEvent(event *event.Event) (string, error) {
defer debug.Recover()
c.SendTyping(event.RoomID, false)
resp, err := c.client.SendMessageEvent(event.RoomID, event.Type, event.Content, mautrix.ReqSendEvent{TransactionID: event.Unsigned.TransactionID})
if err != nil {
return "", err
}
return resp.EventID, nil
}
// SendTyping sets whether or not the user is typing in the given room.
func (c *Container) SendTyping(roomID string, typing bool) {
defer debug.Recover()
ts := time.Now().Unix()
if c.typing > ts && typing {
return
}
if typing {
c.client.UserTyping(roomID, true, 20000)
c.typing = ts + 15
} else {
c.client.UserTyping(roomID, false, 0)
c.typing = 0
}
}
// CreateRoom attempts to create a new room and join the user.
func (c *Container) CreateRoom(req *mautrix.ReqCreateRoom) (*rooms.Room, error) {
resp, err := c.client.CreateRoom(req)
if err != nil {
return nil, err
}
room := c.GetOrCreateRoom(resp.RoomID)
return room, nil
}
// JoinRoom makes the current user try to join the given room.
func (c *Container) JoinRoom(roomID, server string) (*rooms.Room, error) {
resp, err := c.client.JoinRoom(roomID, server, nil)
if err != nil {
return nil, err
}
room := c.GetOrCreateRoom(resp.RoomID)
room.HasLeft = false
return room, nil
}
// LeaveRoom makes the current user leave the given room.
func (c *Container) LeaveRoom(roomID string) error {
_, err := c.client.LeaveRoom(roomID)
if err != nil {
return err
}
node := c.GetOrCreateRoom(roomID)
node.HasLeft = true
node.Unload()
return nil
}
// GetHistory fetches room history.
func (c *Container) GetHistory(room *rooms.Room, limit int) ([]*event.Event, error) {
events, err := c.history.Load(room, limit)
if err != nil {
return nil, err
}
if len(events) > 0 {
debug.Printf("Loaded %d events for %s from local cache", len(events), room.ID)
return events, nil
}
resp, err := c.client.Messages(room.ID, room.PrevBatch, "", 'b', limit)
if err != nil {
return nil, err
}
debug.Printf("Loaded %d events for %s from server from %s to %s", len(resp.Chunk), room.ID, resp.Start, resp.End)
room.PrevBatch = resp.End
c.config.Rooms.Put(room)
if len(resp.Chunk) == 0 {
return []*event.Event{}, nil
}
events, err = c.history.Prepend(room, resp.Chunk)
if err != nil {
return nil, err
}
return events, nil
}
func (c *Container) GetEvent(room *rooms.Room, eventID string) (*event.Event, error) {
evt, err := c.history.Get(room, eventID)
if err != nil && err != EventNotFoundError {
debug.Printf("Failed to get event %s from local cache: %v", eventID, err)
} else if evt != nil {
debug.Printf("Found event %s in local cache", eventID)
return evt, err
}
mxEvent, err := c.client.GetEvent(room.ID, eventID)
if err != nil {
return nil, err
}
evt = event.Wrap(mxEvent)
debug.Printf("Loaded event %s from server", eventID)
return evt, nil
}
// GetOrCreateRoom gets the room instance stored in the session.
func (c *Container) GetOrCreateRoom(roomID string) *rooms.Room {
return c.config.Rooms.GetOrCreate(roomID)
}
// GetRoom gets the room instance stored in the session.
func (c *Container) GetRoom(roomID string) *rooms.Room {
return c.config.Rooms.Get(roomID)
}
var mxcRegex = regexp.MustCompile("mxc://(.+)/(.+)")
// 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
}
hs = parts[1]
id = parts[2]
cacheFile := c.GetCachePath(hs, id)
var info os.FileInfo
if info, err = os.Stat(cacheFile); err == nil && !info.IsDir() {
data, err = ioutil.ReadFile(cacheFile)
if err == nil {
return
}
}
data, err = c.download(hs, id, cacheFile)
return
}
func (c *Container) GetDownloadURL(hs, id string) string {
dlURL, _ := url.Parse(c.client.HomeserverURL.String())
if dlURL.Scheme == "" {
dlURL.Scheme = "https"
}
dlURL.Path = path.Join(dlURL.Path, "/_matrix/media/v1/download", hs, id)
return dlURL.String()
}
func (c *Container) download(hs, id, cacheFile string) (data []byte, err error) {
var resp *http.Response
resp, err = c.client.Client.Get(c.GetDownloadURL(hs, id))
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
}
// 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)
}