forked from owncast/owncast
-
Notifications
You must be signed in to change notification settings - Fork 0
/
persistence.go
320 lines (262 loc) · 8.02 KB
/
persistence.go
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
package chat
import (
"fmt"
"strings"
"time"
"github.com/dolfly/owncast/core/chat/events"
"github.com/dolfly/owncast/core/data"
"github.com/dolfly/owncast/core/user"
"github.com/dolfly/owncast/models"
log "github.com/sirupsen/logrus"
)
var _datastore *data.Datastore
const (
maxBacklogHours = 5 // Keep backlog max hours worth of messages
maxBacklogNumber = 50 // Return max number of messages in history request
)
func setupPersistence() {
_datastore = data.GetDatastore()
data.CreateMessagesTable(_datastore.DB)
chatDataPruner := time.NewTicker(5 * time.Minute)
go func() {
runPruner()
for range chatDataPruner.C {
runPruner()
}
}()
}
// SaveUserMessage will save a single chat event to the messages database.
func SaveUserMessage(event events.UserMessageEvent) {
saveEvent(event.ID, event.User.ID, event.Body, event.Type, event.HiddenAt, event.Timestamp)
}
func saveEvent(id string, userID string, body string, eventType string, hidden *time.Time, timestamp time.Time) {
defer func() {
_historyCache = nil
}()
_datastore.DbLock.Lock()
defer _datastore.DbLock.Unlock()
tx, err := _datastore.DB.Begin()
if err != nil {
log.Errorln("error saving", eventType, err)
return
}
defer tx.Rollback() // nolint
stmt, err := tx.Prepare("INSERT INTO messages(id, user_id, body, eventType, hidden_at, timestamp) values(?, ?, ?, ?, ?, ?)")
if err != nil {
log.Errorln("error saving", eventType, err)
return
}
defer stmt.Close()
if _, err = stmt.Exec(id, userID, body, eventType, hidden, timestamp); err != nil {
log.Errorln("error saving", eventType, err)
return
}
if err = tx.Commit(); err != nil {
log.Errorln("error saving", eventType, err)
return
}
}
func getChat(query string) []events.UserMessageEvent {
history := make([]events.UserMessageEvent, 0)
rows, err := _datastore.DB.Query(query)
if err != nil {
log.Errorln("error fetching chat history", err)
return history
}
defer rows.Close()
for rows.Next() {
var id string
var userID string
var body string
var messageType models.EventType
var hiddenAt *time.Time
var timestamp time.Time
var userDisplayName *string
var userDisplayColor *int
var userCreatedAt *time.Time
var userDisabledAt *time.Time
var previousUsernames *string
var userNameChangedAt *time.Time
// Convert a database row into a chat event
err = rows.Scan(&id, &userID, &body, &messageType, &hiddenAt, ×tamp, &userDisplayName, &userDisplayColor, &userCreatedAt, &userDisabledAt, &previousUsernames, &userNameChangedAt)
if err != nil {
log.Errorln("There is a problem converting query to chat objects. Please report this:", query)
break
}
// System messages and chat actions are special and are not from real users
if messageType == events.SystemMessageSent || messageType == events.ChatActionSent {
name := "Owncast"
userDisplayName = &name
color := 200
userDisplayColor = &color
}
if previousUsernames == nil {
previousUsernames = userDisplayName
}
if userCreatedAt == nil {
now := time.Now()
userCreatedAt = &now
}
user := user.User{
ID: userID,
AccessToken: "",
DisplayName: *userDisplayName,
DisplayColor: *userDisplayColor,
CreatedAt: *userCreatedAt,
DisabledAt: userDisabledAt,
NameChangedAt: userNameChangedAt,
PreviousNames: strings.Split(*previousUsernames, ","),
}
message := events.UserMessageEvent{
Event: events.Event{
Type: messageType,
ID: id,
Timestamp: timestamp,
},
UserEvent: events.UserEvent{
User: &user,
HiddenAt: hiddenAt,
},
MessageEvent: events.MessageEvent{
Body: body,
RawBody: body,
},
}
history = append(history, message)
}
return history
}
var _historyCache *[]events.UserMessageEvent
// GetChatModerationHistory will return all the chat messages suitable for moderation purposes.
func GetChatModerationHistory() []events.UserMessageEvent {
if _historyCache != nil {
return *_historyCache
}
// Get all messages regardless of visibility
var query = "SELECT messages.id, user_id, body, eventType, hidden_at, timestamp, display_name, display_color, created_at, disabled_at, previous_names, namechanged_at FROM messages INNER JOIN users ON messages.user_id = users.id ORDER BY timestamp DESC"
result := getChat(query)
_historyCache = &result
return result
}
// GetChatHistory will return all the chat messages suitable for returning as user-facing chat history.
func GetChatHistory() []events.UserMessageEvent {
// Get all visible messages
var query = fmt.Sprintf("SELECT messages.id, user_id, body, eventType, hidden_at, timestamp, display_name, display_color, created_at, disabled_at, previous_names, namechanged_at FROM messages, users WHERE messages.user_id = users.id AND hidden_at IS NULL AND disabled_at IS NULL ORDER BY timestamp DESC LIMIT %d", maxBacklogNumber)
m := getChat(query)
// Invert order of messages
for i, j := 0, len(m)-1; i < j; i, j = i+1, j-1 {
m[i], m[j] = m[j], m[i]
}
return m
}
// SetMessageVisibilityForUserID will bulk change the visibility of messages for a user
// and then send out visibility changed events to chat clients.
func SetMessageVisibilityForUserID(userID string, visible bool) error {
defer func() {
_historyCache = nil
}()
// Get a list of IDs from this user within the 5hr window to send to the connected clients to hide
ids := make([]string, 0)
query := fmt.Sprintf("SELECT messages.id, user_id, body, eventType, hidden_at, timestamp, display_name, display_color, created_at, disabled_at, previous_names, namechanged_at FROM messages INNER JOIN users ON messages.user_id = users.id WHERE user_id IS '%s'", userID)
messages := getChat(query)
if len(messages) == 0 {
return nil
}
for _, message := range messages {
ids = append(ids, message.ID)
}
// Tell the clients to hide/show these messages.
return SetMessagesVisibility(ids, visible)
}
func saveMessageVisibility(messageIDs []string, visible bool) error {
defer func() {
_historyCache = nil
}()
_datastore.DbLock.Lock()
defer _datastore.DbLock.Unlock()
tx, err := _datastore.DB.Begin()
if err != nil {
return err
}
stmt, err := tx.Prepare("UPDATE messages SET hidden_at=? WHERE id IN (?" + strings.Repeat(",?", len(messageIDs)-1) + ")")
if err != nil {
return err
}
defer stmt.Close()
var hiddenAt *time.Time
if !visible {
now := time.Now()
hiddenAt = &now
} else {
hiddenAt = nil
}
args := make([]interface{}, len(messageIDs)+1)
args[0] = hiddenAt
for i, id := range messageIDs {
args[i+1] = id
}
if _, err = stmt.Exec(args...); err != nil {
return err
}
if err = tx.Commit(); err != nil {
return err
}
return nil
}
func getMessageByID(messageID string) (*events.UserMessageEvent, error) {
var query = "SELECT * FROM messages WHERE id = ?"
row := _datastore.DB.QueryRow(query, messageID)
var id string
var userID string
var body string
var eventType models.EventType
var hiddenAt *time.Time
var timestamp time.Time
err := row.Scan(&id, &userID, &body, &eventType, &hiddenAt, ×tamp)
if err != nil {
log.Errorln(err)
return nil, err
}
user := user.GetUserByID(userID)
return &events.UserMessageEvent{
events.Event{
Type: eventType,
ID: id,
Timestamp: timestamp,
},
events.UserEvent{
User: user,
HiddenAt: hiddenAt,
},
events.MessageEvent{
Body: body,
},
}, nil
}
// Only keep recent messages so we don't keep more chat data than needed
// for privacy and efficiency reasons.
func runPruner() {
_datastore.DbLock.Lock()
defer _datastore.DbLock.Unlock()
log.Traceln("Removing chat messages older than", maxBacklogHours, "hours")
deleteStatement := `DELETE FROM messages WHERE timestamp <= datetime('now', 'localtime', ?)`
tx, err := _datastore.DB.Begin()
if err != nil {
log.Debugln(err)
return
}
stmt, err := tx.Prepare(deleteStatement)
if err != nil {
log.Debugln(err)
return
}
defer stmt.Close()
if _, err = stmt.Exec(fmt.Sprintf("-%d hours", maxBacklogHours)); err != nil {
log.Debugln(err)
return
}
if err = tx.Commit(); err != nil {
log.Debugln(err)
return
}
}