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|
// 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"
"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 in config")
}
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{}
c.history, err = NewHistoryManager(c.config.HistoryPath)
if err != nil {
return err
}
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)
}
}
}
// 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)
// Just pass encrypted events as messages, they'll show up with an encryption unsupported message.
c.syncer.OnEventType(mautrix.EventEncrypted, c.HandleMessage)
c.syncer.OnEventType(mautrix.EventSticker, 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()
}
}
// 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
}
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)
}
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