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
|
package whatsapp
import (
"github.com/Rhymen/go-whatsapp/binary"
"github.com/Rhymen/go-whatsapp/binary/proto"
"log"
"strconv"
"time"
)
type MessageOffsetInfo struct {
FirstMessageId string
FirstMessageOwner bool
}
func decodeMessages(n *binary.Node) []*proto.WebMessageInfo {
var messages = make([]*proto.WebMessageInfo, 0)
if n == nil || n.Attributes == nil || n.Content == nil {
return messages
}
for _, msg := range n.Content.([]interface{}) {
switch msg.(type) {
case *proto.WebMessageInfo:
messages = append(messages, msg.(*proto.WebMessageInfo))
default:
log.Println("decodeMessages: Non WebMessage encountered")
}
}
return messages
}
// LoadChatMessages is useful to "scroll" messages, loading by count at a time
// if handlers == nil the func will use default handlers
// if after == true LoadChatMessages will load messages after the specified messageId, otherwise it will return
// message before the messageId
func (wac *Conn) LoadChatMessages(jid string, count int, messageId string, owner bool, after bool, handlers ...Handler) error {
if count <= 0 {
return nil
}
if handlers == nil {
handlers = wac.handler
}
kind := "before"
if after {
kind = "after"
}
node, err := wac.query("message", jid, messageId, kind,
strconv.FormatBool(owner), "", count, 0)
if err != nil {
wac.handleWithCustomHandlers(err, handlers)
return err
}
for _, msg := range decodeMessages(node) {
wac.handleWithCustomHandlers(ParseProtoMessage(msg), handlers)
wac.handleWithCustomHandlers(msg, handlers)
}
return nil
}
// LoadFullChatHistory loads full chat history for the given jid
// chunkSize = how many messages to load with one query; if handlers == nil the func will use default handlers;
// pauseBetweenQueries = how much time to sleep between queries
func (wac *Conn) LoadFullChatHistory(jid string, chunkSize int,
pauseBetweenQueries time.Duration, handlers ...Handler) {
if chunkSize <= 0 {
return
}
if handlers == nil {
handlers = wac.handler
}
beforeMsg := ""
beforeMsgIsOwner := true
for {
node, err := wac.query("message", jid, beforeMsg, "before",
strconv.FormatBool(beforeMsgIsOwner), "", chunkSize, 0)
if err != nil {
wac.handleWithCustomHandlers(err, handlers)
} else {
msgs := decodeMessages(node)
for _, msg := range msgs {
wac.handleWithCustomHandlers(ParseProtoMessage(msg), handlers)
wac.handleWithCustomHandlers(msg, handlers)
}
if len(msgs) == 0 {
break
}
beforeMsg = *msgs[0].Key.Id
beforeMsgIsOwner = msgs[0].Key.FromMe != nil && *msgs[0].Key.FromMe
}
<-time.After(pauseBetweenQueries)
}
}
// LoadFullChatHistoryAfter loads all messages after the specified messageId
// useful to "catch up" with the message history after some specified message
func (wac *Conn) LoadFullChatHistoryAfter(jid string, messageId string, chunkSize int,
pauseBetweenQueries time.Duration, handlers ...Handler) {
if chunkSize <= 0 {
return
}
if handlers == nil {
handlers = wac.handler
}
msgOwner := true
prevNotFound := false
for {
node, err := wac.query("message", jid, messageId, "after",
strconv.FormatBool(msgOwner), "", chunkSize, 0)
if err != nil {
// Whatsapp will return 404 status when there is wrong owner flag on the requested message id
if err == ErrServerRespondedWith404 {
// this will detect two consecutive "not found" errors.
// this is done to prevent infinite loop when wrong message id supplied
if prevNotFound {
log.Println("LoadFullChatHistoryAfter: could not retrieve any messages, wrong message id?")
return
}
prevNotFound = true
// try to reverse the owner flag and retry
if msgOwner {
// reverse initial msgOwner value and retry
msgOwner = false
<-time.After(time.Second)
continue
}
}
// if the error isn't a 404 error, pass it to the error handler
wac.handleWithCustomHandlers(err, handlers)
} else {
msgs := decodeMessages(node)
for _, msg := range msgs {
wac.handleWithCustomHandlers(ParseProtoMessage(msg), handlers)
wac.handleWithCustomHandlers(msg, handlers)
}
if len(msgs) != chunkSize {
break
}
messageId = *msgs[0].Key.Id
msgOwner = msgs[0].Key.FromMe != nil && *msgs[0].Key.FromMe
}
// message was found
prevNotFound = false
<-time.After(pauseBetweenQueries)
}
}
|
