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loaferapi.go
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loaferapi.go
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package loafer
import (
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"net/http"
"net/url"
"strings"
)
// slackUserQuery - Calls Slack Users.info or Users.lookupByEmail API
func slackUserCall(uri string, token string) (*SlackUser, error) {
var userQuery SlackUsersQuery
client := &http.Client{}
r, err := http.NewRequest("GET", uri, nil)
if err != nil {
return nil, err
}
r.Header.Set("Content-Type", "application/x-www-form-urlencoded")
r.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token))
resp, err := client.Do(r)
if err != nil {
return nil, err
}
text, err := ioutil.ReadAll(resp.Body)
defer resp.Body.Close()
defer client.CloseIdleConnections()
if err != nil {
return nil, err
}
if !strings.Contains(string(text), "\"ok\":true") {
return nil, err
}
err = json.NewDecoder(strings.NewReader(string(text))).Decode(&userQuery)
if err != nil {
return nil, err
}
return &userQuery.User, nil
}
// slackMessageCall - Calls Slack Chat.PostMessage API
func slackMessageCall(uri string, form url.Values, token string) error {
client := &http.Client{}
r, err := http.NewRequest("POST", uri, strings.NewReader(form.Encode()))
if err != nil {
return err
}
r.Header.Set("Content-Type", "application/x-www-form-urlencoded")
r.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token))
resp, err := client.Do(r)
if err != nil {
return err
}
bodyText, err := ioutil.ReadAll(resp.Body)
defer resp.Body.Close()
defer client.CloseIdleConnections()
if err != nil {
return err
}
if !strings.Contains(string(bodyText), "\"ok\":true") {
return errors.New(string(bodyText))
}
return nil
}
// OpenView - Open view in slack
func OpenView(view SlackModal, triggerID string, token string) error {
jsonView, err := json.Marshal(view)
if err != nil {
return err
}
form := url.Values{
"view": []string{string(jsonView)},
"trigger_id": []string{triggerID}}
client := &http.Client{}
r, err := http.NewRequest("POST", "https://slack.com/api/views.open", strings.NewReader(form.Encode()))
if err != nil {
return err
}
r.Header.Set("Content-Type", "application/x-www-form-urlencoded")
r.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token))
resp, err := client.Do(r)
if err != nil {
return err
}
bodyText, err := ioutil.ReadAll(resp.Body)
defer resp.Body.Close()
defer client.CloseIdleConnections()
if err != nil {
return err
}
if !strings.Contains(string(bodyText), "\"ok\":true") {
fmt.Println(string(bodyText))
return errors.New(string(bodyText))
}
return nil
}
// UpdateView - Update a view in slack
func UpdateView(view SlackInteractionView, viewID string, token string) error {
jsonView, err := json.Marshal(view)
if err != nil {
return err
}
form := url.Values{
"view": []string{string(jsonView)},
"view_id": []string{viewID}}
client := &http.Client{}
r, err := http.NewRequest("POST", "https://slack.com/api/views.update", strings.NewReader(form.Encode()))
if err != nil {
return err
}
r.Header.Set("Content-Type", "application/x-www-form-urlencoded")
r.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token))
resp, err := client.Do(r)
if err != nil {
return err
}
bodyText, err := ioutil.ReadAll(resp.Body)
defer resp.Body.Close()
defer client.CloseIdleConnections()
if err != nil {
return err
}
if !strings.Contains(string(bodyText), "\"ok\":true") {
return errors.New(string(bodyText))
}
return nil
}
// FindUserByEmail - Finding slack user by email
func FindUserByEmail(email string, token string) (*SlackUser, error) {
return slackUserCall(fmt.Sprintf("https://slack.com/api/users.lookupByEmail?email=%s&token=%s", email, token), token)
}
// FindUserByID - Finding slack user by id
func FindUserByID(id string, token string) (*SlackUser, error) {
return slackUserCall(fmt.Sprintf("https://slack.com/api/users.info?user=%s&token=%s", id, token), token)
}
// UpdateMessage - Update a slack message
func UpdateMessage(channel string, ts string, blocks ISlackBlockKitUI, text string, token string) error {
var jsonBlocks []byte
var err error
if blocks != nil {
jsonBlocks, err = json.Marshal(blocks)
if err != nil {
return err
}
}
form := url.Values{
"channel": []string{channel},
"ts": []string{ts},
"text": []string{text}}
if blocks != nil {
form.Set("blocks", string(jsonBlocks))
}
return slackMessageCall("https://slack.com/api/chat.update", form, token)
}
// PostMessage - Post a message
func PostMessage(channel string, blocks ISlackBlockKitUI, text string, token string) error {
var jsonBlocks []byte
var err error
if blocks != nil {
jsonBlocks, err = json.Marshal(blocks)
if err != nil {
return err
}
}
form := url.Values{
"channel": []string{channel},
"text": []string{text}}
if blocks != nil {
form.Set("blocks", string(jsonBlocks))
}
return slackMessageCall("https://slack.com/api/chat.postMessage", form, token)
}
// FileUpload - Upload a file
func FileUpload(channels []string, filename string, content string, filetype string, token string) error {
form := url.Values{
"content": []string{content},
"filename": []string{filename},
"filetype": []string{filetype},
"channels": []string{strings.Join(channels, ",")}}
client := &http.Client{}
r, err := http.NewRequest("POST", "https://slack.com/api/files.upload", strings.NewReader(form.Encode()))
if err != nil {
return err
}
r.Header.Set("Content-Type", "application/x-www-form-urlencoded")
r.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token))
resp, err := client.Do(r)
if err != nil {
return err
}
text, err := ioutil.ReadAll(resp.Body)
defer resp.Body.Close()
defer client.CloseIdleConnections()
if err != nil {
return err
}
if !strings.Contains(string(text), "\"ok\":true") {
return err
}
return nil
}