aboutsummaryrefslogtreecommitdiff
path: root/server.go
blob: 4628c1364cf6de74181fdfdbc5fd1c9ad16c2e0e (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
package main

import (
	"context"
	"encoding/json"
	"fmt"
	"net"
	"net/http"
	"os"
	"strings"

	"github.com/gorilla/mux"
	log "github.com/sirupsen/logrus"

	"git.deuxfleurs.fr/Deuxfleurs/easybridge/connector"
	"git.deuxfleurs.fr/Deuxfleurs/easybridge/mxlib"
)

var mx *mxlib.Client

func StartAppService(errch chan error, ctx context.Context) (*http.Server, error) {
	mx = mxlib.NewClient(config.Server, registration.AsToken)

	err := InitDb()
	if err != nil {
		return nil, err
	}

	if dbKvGet("ezbr_initialized") != "yes" {
		err = mx.RegisterUser(registration.SenderLocalpart)
		if mxe, ok := err.(*mxlib.MxError); !ok || mxe.ErrCode != "M_USER_IN_USE" {
			return nil, err
		}

		_, st := os.Stat(config.AvatarFile)
		if !os.IsNotExist(st) {
			err = mx.ProfileAvatar(ezbrMxId(), &connector.FileMediaObject{
				Path: config.AvatarFile,
			})
			if err != nil {
				return nil, err
			}
		}

		err = mx.ProfileDisplayname(ezbrMxId(), fmt.Sprintf("Easybridge (%s)", EASYBRIDGE_SYSTEM_PROTOCOL))
		if err != nil {
			return nil, err
		}

		dbKvPut("ezbr_initialized", "yes")
	}

	router := mux.NewRouter()
	router.HandleFunc("/_matrix/app/v1/transactions/{txnId}", handleTxn)
	router.HandleFunc("/transactions/{txnId}", handleTxn)

	log.Printf("Starting HTTP server on %s", config.ASBindAddr)
	http_server := &http.Server{
		Addr:    config.ASBindAddr,
		Handler: checkTokenAndLog(router),
		BaseContext: func(net.Listener) context.Context {
			return ctx
		},
	}
	go func() {
		err := http_server.ListenAndServe()
		if err != nil {
			errch <- err
		}
	}()

	// Notify users that Easybridge has restarted
	go func() {
		var users []DbAccountConfig
		db.Model(&DbAccountConfig{}).Select("mx_user_id").Group("mx_user_id").Find(&users)
		for _, u := range users {
			ezbrSystemSendf(u.MxUserID,
				"Easybridge has restarted, please visit %s or open configuration widget to reconnect to your accounts.",
				config.WebURL)
		}
	}()

	return http_server, nil
}

func checkTokenAndLog(handler http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		r.ParseForm()
		if strings.Join(r.Form["access_token"], "") != registration.HsToken {
			http.Error(w, "Wrong or no token provided", http.StatusUnauthorized)
			return
		}

		log.Printf("%s %s %s\n", r.RemoteAddr, r.Method, strings.Split(r.URL.String(), "?")[0])
		handler.ServeHTTP(w, r)
	})
}

func handleTxn(w http.ResponseWriter, r *http.Request) {
	if r.Method == "PUT" {
		var txn mxlib.Transaction
		err := json.NewDecoder(r.Body).Decode(&txn)
		if err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			log.Warnf("JSON decode error: %s\n", err)
			return
		}

		log.Debugf("Processing transaction %s (%d events)", mux.Vars(r)["txnId"], len(txn.Events))
		log.Tracef("Transaction content: %#v\n", txn)

		for i := range txn.Events {
			ev := &txn.Events[i]
			if isBridgedIdentifier(ev.Sender) {
				// Don't do anything with ezbr events that come back to us
				continue
			}
			err = handleTxnEvent(ev)
			if err != nil {
				ezbrSystemSend(ev.Sender, fmt.Sprintf("Could not process %s (from %s): %s", ev.Type, ev.Sender, err))
			}
		}

		fmt.Fprintf(w, "{}\n")
	} else {
		http.Error(w, "Expected PUT request", http.StatusBadRequest)
	}
}

func handleTxnEvent(e *mxlib.Event) error {
	if e.Type == "m.room.message" {
		e_body, ok := e.Content["body"].(string)
		if !ok {
			return fmt.Errorf("Invalid m.room.message event, body is not defined: %#v", e)
		}
		typ, ok := e.Content["msgtype"].(string)
		if !ok {
			return fmt.Errorf("Invalid m.room.message event, msgtype is not defined: %#v", e)
		}

		ev := &connector.Event{
			Type: connector.EVENT_MESSAGE,
			Text: e_body,
			Id:   e.EventId,
		}

		if typ == "m.emote" {
			ev.Type = connector.EVENT_MESSAGE
		} else if typ == "m.file" || typ == "m.image" {
			ev.Text = ""
			ev.Attachments = []connector.SMediaObject{
				connector.SMediaObject{mx.ParseMediaInfo(e.Content)},
			}
		}

		if pm_room := dbIsPmRoom(e.RoomId); pm_room != nil {
			if pm_room.Protocol == EASYBRIDGE_SYSTEM_PROTOCOL {
				handleSystemMessage(e.Sender, e_body)
				return nil
			}
			// If this is a private message room
			acct := FindAccount(pm_room.MxUserID, pm_room.AccountName)
			if acct == nil {
				return fmt.Errorf("Not connected to %s", pm_room.AccountName)
			} else if e.Sender == pm_room.MxUserID {
				ev.Author = acct.Conn.User()
				ev.Recipient = pm_room.UserID
				_, err := acct.Conn.Send(ev)
				return err
			}
		} else if room := dbIsPublicRoom(e.RoomId); room != nil {
			// If this is a regular room
			acct := FindJoinedAccount(e.Sender, room.Protocol, room.RoomID)
			if acct != nil {
				ev.Author = acct.Conn.User()
				ev.Room = room.RoomID

				// use room id as lock slot key, see account.go in eventInternal
				dbLockSlot(e.RoomId)
				defer dbUnlockSlot(e.RoomId)

				created_ev_id, err := acct.Conn.Send(ev)
				if err == nil && created_ev_id != "" {
					cache_key := fmt.Sprintf("%s/event_seen/%s/%s",
						room.Protocol, e.RoomId, created_ev_id)
					dbKvPutLocked(cache_key, "yes")
				}
				return err
			} else {
				mx.RoomKick(e.RoomId, e.Sender, fmt.Sprintf("Not present in %s on %s, please talk with Easybridge to rejoin", room.RoomID, room.Protocol))
				return fmt.Errorf("not joined %s on %s", room.RoomID, room.Protocol)
			}
		} else {
			return fmt.Errorf("Room not bridged")
		}
	} else if e.Type == "m.room.member" {
		ms, ok := e.Content["membership"].(string)
		if !ok {
			return fmt.Errorf("Invalid m.room.member event, membership is not defined: %#v", e)
		}

		if ms == "leave" {
			if pm_room := dbIsPmRoom(e.RoomId); pm_room != nil {
				// If user leaves a PM room, we must drop it
				dbDeletePmRoom(pm_room)
				them_mx := userMxId(pm_room.Protocol, pm_room.UserID)
				mx.RoomLeaveAs(e.RoomId, them_mx)
				return nil
			} else if room := dbIsPublicRoom(e.RoomId); room != nil {
				// If leaving a public room, leave from server as well
				acct := FindJoinedAccount(e.Sender, room.Protocol, room.RoomID)
				if acct != nil {
					acct.Conn.Leave(room.RoomID)
					acct.delAutojoin(room.RoomID)
					return nil
				} else {
					mx.RoomKick(e.RoomId, e.Sender, fmt.Sprintf("Not present in %s on %s, please talk with Easybridge to rejoin", room.RoomID, room.Protocol))
					return fmt.Errorf("not joined %s on %s", room.RoomID, room.Protocol)
				}
			} else {
				return fmt.Errorf("Room not bridged")
			}
		}
	} else if e.Type == "m.room.topic" {
		e_topic, ok := e.Content["topic"].(string)
		if !ok {
			return fmt.Errorf("Invalid m.room.topic event, topic is not defined: %#v", e)
		}

		if room := dbIsPublicRoom(e.RoomId); room != nil {
			acct := FindJoinedAccount(e.Sender, room.Protocol, room.RoomID)
			if acct != nil {
				return acct.Conn.SetRoomInfo(room.RoomID, &connector.RoomInfo{
					Topic: e_topic,
				})
			} else {
				return fmt.Errorf("Could not find room account for %s %s %s", e.Sender, room.Protocol, room.RoomID)
			}
		}
	}
	return nil
}

func handleSystemMessage(mxid string, msg string) {
	cmd := strings.Fields(msg)
	if len(cmd) == 0 {
		return
	}

	switch cmd[0] {
	case "help":
		ezbrSystemSend(mxid, "Welcome to Easybridge! Here is a list of available commands:")
		ezbrSystemSend(mxid, "- help: request help")
		ezbrSystemSend(mxid, "- list: list accounts")
		ezbrSystemSend(mxid, "- accounts: list accounts")
		ezbrSystemSend(mxid, "- join <protocol or account> <room id>: join public chat room")
		ezbrSystemSend(mxid, "- talk <protocol or account> <user id>: open private conversation to contact")
		ezbrSystemSend(mxid, "- search <protocol or account> <name>: search for users by name")
	case "list", "account", "accounts":
		one := false
		if accts, ok := registeredAccounts[mxid]; ok {
			for name, acct := range accts {
				one = true
				ezbrSystemSendf(mxid, "- %s (%s)", name, acct.Protocol)
			}
		}
		if !one {
			ezbrSystemSendf(mxid, "No account currently configured")
		}
	case "join":
		if len(cmd) != 3 {
			ezbrSystemSendf(mxid, "Usage: %s <protocol or account> <room id>", cmd[0])
			return
		}

		account := findAccount(mxid, cmd[1])
		if account != nil {
			err := account.Conn.Join(connector.RoomID(cmd[2]))
			if err != nil {
				ezbrSystemSendf(mxid, "%s", err)
			}
		} else {
			ezbrSystemSendf(mxid, "No account with name or using protocol %s", cmd[1])
		}
	case "query", "talk":
		if len(cmd) != 3 {
			ezbrSystemSendf(mxid, "Usage: %s <protocol or account> <user id>", cmd[0])
			return
		}

		account := findAccount(mxid, cmd[1])
		if account != nil {
			quser := connector.UserID(cmd[2])
			err := account.Conn.Invite(quser, connector.RoomID(""))
			if err != nil {
				ezbrSystemSendf(mxid, "%s", err)
				return
			}

			quser_mxid, err := dbGetMxUser(account.Protocol, quser)
			if err != nil {
				ezbrSystemSendf(mxid, "%s", err)
				return
			}
			_, err = dbGetMxPmRoom(account.Protocol, quser, quser_mxid, mxid, account.AccountName)
			if err != nil {
				ezbrSystemSendf(mxid, "%s", err)
			}
		} else {
			ezbrSystemSendf(mxid, "No account with name or using protocol %s", cmd[1])
		}
	case "search":
		if len(cmd) < 3 {
			ezbrSystemSendf(mxid, "Usage: %s <protocol or account> <name>", cmd[0])
			return
		}

		account := findAccount(mxid, cmd[1])
		if account != nil {
			rep, err := account.Conn.SearchForUsers(strings.Join(cmd[2:], " "))
			if err != nil {
				ezbrSystemSendf(mxid, "Search error: %s", err)
			} else {
				ezbrSystemSendf(mxid, "%d users found", len(rep))
				for _, user := range rep {
					ezbrSystemSendf(mxid, "- %s (%s)", user.DisplayName, user.ID)
				}
			}
		} else {
			ezbrSystemSendf(mxid, "No account with name or using protocol %s", cmd[1])
		}
	default:
		ezbrSystemSend(mxid, "Unrecognized command. Type `help` if you need some help!")
	}
}

func findAccount(mxid string, q string) *Account {
	if accts, ok := registeredAccounts[mxid]; ok {
		for name, acct := range accts {
			if strings.EqualFold(name, q) || strings.EqualFold(acct.Protocol, q) {
				return acct
			}
		}
	}
	return nil
}