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
|
package slack
import (
"bytes"
"encoding/json"
)
// InteractionType type of interactions
type InteractionType string
// ActionType type represents the type of action (attachment, block, etc.)
type actionType string
// action is an interface that should be implemented by all callback action types
type action interface {
actionType() actionType
}
// Types of interactions that can be received.
const (
InteractionTypeDialogCancellation = InteractionType("dialog_cancellation")
InteractionTypeDialogSubmission = InteractionType("dialog_submission")
InteractionTypeDialogSuggestion = InteractionType("dialog_suggestion")
InteractionTypeInteractionMessage = InteractionType("interactive_message")
InteractionTypeMessageAction = InteractionType("message_action")
InteractionTypeBlockActions = InteractionType("block_actions")
InteractionTypeBlockSuggestion = InteractionType("block_suggestion")
InteractionTypeViewSubmission = InteractionType("view_submission")
InteractionTypeViewClosed = InteractionType("view_closed")
InteractionTypeShortcut = InteractionType("shortcut")
)
// InteractionCallback is sent from slack when a user interactions with a button or dialog.
type InteractionCallback struct {
Type InteractionType `json:"type"`
Token string `json:"token"`
CallbackID string `json:"callback_id"`
ResponseURL string `json:"response_url"`
TriggerID string `json:"trigger_id"`
ActionTs string `json:"action_ts"`
Team Team `json:"team"`
Channel Channel `json:"channel"`
User User `json:"user"`
OriginalMessage Message `json:"original_message"`
Message Message `json:"message"`
Name string `json:"name"`
Value string `json:"value"`
MessageTs string `json:"message_ts"`
AttachmentID string `json:"attachment_id"`
ActionCallback ActionCallbacks `json:"actions"`
View View `json:"view"`
ActionID string `json:"action_id"`
APIAppID string `json:"api_app_id"`
BlockID string `json:"block_id"`
Container Container `json:"container"`
DialogSubmissionCallback
ViewSubmissionCallback
ViewClosedCallback
}
type Container struct {
Type string `json:"type"`
ViewID string `json:"view_id"`
}
// ActionCallback is a convenience struct defined to allow dynamic unmarshalling of
// the "actions" value in Slack's JSON response, which varies depending on block type
type ActionCallbacks struct {
AttachmentActions []*AttachmentAction
BlockActions []*BlockAction
}
// MarshalJSON implements the Marshaller interface in order to combine both
// action callback types back into a single array, like how the api responds.
// This makes Marshaling and Unmarshaling an InteractionCallback symmetrical
func (a ActionCallbacks) MarshalJSON() ([]byte, error) {
count := 0
length := len(a.AttachmentActions) + len(a.BlockActions)
buffer := bytes.NewBufferString("[")
f := func(obj interface{}) error {
js, err := json.Marshal(obj)
if err != nil {
return err
}
_, err = buffer.Write(js)
if err != nil {
return err
}
count++
if count < length {
_, err = buffer.WriteString(",")
return err
}
return nil
}
for _, act := range a.AttachmentActions {
err := f(act)
if err != nil {
return nil, err
}
}
for _, blk := range a.BlockActions {
err := f(blk)
if err != nil {
return nil, err
}
}
buffer.WriteString("]")
return buffer.Bytes(), nil
}
// UnmarshalJSON implements the Marshaller interface in order to delegate
// marshalling and allow for proper type assertion when decoding the response
func (a *ActionCallbacks) UnmarshalJSON(data []byte) error {
var raw []json.RawMessage
err := json.Unmarshal(data, &raw)
if err != nil {
return err
}
for _, r := range raw {
var obj map[string]interface{}
err := json.Unmarshal(r, &obj)
if err != nil {
return err
}
if _, ok := obj["block_id"].(string); ok {
action, err := unmarshalAction(r, &BlockAction{})
if err != nil {
return err
}
a.BlockActions = append(a.BlockActions, action.(*BlockAction))
return nil
}
action, err := unmarshalAction(r, &AttachmentAction{})
if err != nil {
return err
}
a.AttachmentActions = append(a.AttachmentActions, action.(*AttachmentAction))
}
return nil
}
func unmarshalAction(r json.RawMessage, callbackAction action) (action, error) {
err := json.Unmarshal(r, callbackAction)
if err != nil {
return nil, err
}
return callbackAction, nil
}
|
