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get_slack_reaction.go
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/
get_slack_reaction.go
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package main
import (
"fmt"
"io"
"log"
"net/http"
"github.com/bwmarrin/discordgo"
"github.com/kmc-jp/DiscordSlackSynchronizer/discord_webhook"
"github.com/kmc-jp/DiscordSlackSynchronizer/settings"
"github.com/kmc-jp/DiscordSlackSynchronizer/slack_emoji_imager"
"github.com/kmc-jp/DiscordSlackSynchronizer/slack_webhook"
"github.com/pkg/errors"
)
type SlackReactionHandler struct {
reactionImager ReactionImagerType
discordHook *discord_webhook.Handler
slackHook *slack_webhook.Handler
messageFinder *MessageFinder
settings *settings.Handler
escaper MessageEscaper
}
type ReactionImagerType interface {
AddEmoji(name string, uri string)
RemoveEmoji(string)
MakeReactionsImage(channel string, timestamp string) (r io.Reader, err error)
GetEmojiURI(name string) string
}
func NewSlackReactionHandler(slackHook *slack_webhook.Handler, discordHook *discord_webhook.Handler, messageFinder *MessageFinder, settings *settings.Handler) *SlackReactionHandler {
return &SlackReactionHandler{
slackHook: slackHook,
discordHook: discordHook,
messageFinder: messageFinder,
settings: settings,
}
}
func (d *SlackReactionHandler) SetReactionImager(imager ReactionImagerType) {
d.reactionImager = imager
}
func (d *SlackReactionHandler) SetMessageEscaper(escaper MessageEscaper) {
d.escaper = escaper
}
func (d *SlackReactionHandler) GetReaction(channel string, timestamp string) error {
const ReactionGifName = "reactions.gif"
var cs, _ = d.settings.FindDiscordChannel(channel)
if !cs.Setting.SlackToDiscord {
return nil
}
srcContent, err := d.slackHook.GetMessage(channel, timestamp)
if err != nil {
return errors.Wrap(err, "SlackGetMessage")
}
srcContent.Channel = channel
var oldAttachments []*discordgo.MessageAttachment
dMessage, _, err := d.messageFinder.FindFromSlackMessage(srcContent, cs.DiscordChannel)
if err != nil {
return errors.Wrap(err, "FindFromSlackMessage")
}
oldAttachments = dMessage.Attachments
var message = discord_webhook.FromDiscordgoMessage(dMessage)
// not found
if message.ID == "" {
return fmt.Errorf("MessageNotFound")
}
var dFiles = []discord_webhook.File{}
for _, attach := range message.Attachments {
if attach.Filename == ReactionGifName {
// Reaction Gif should be renewed
continue
}
resp, err := http.Get(attach.URL)
if err != nil {
log.Printf("GetFileError: %s\n", err.Error())
continue
}
defer resp.Body.Close()
var dFile = discord_webhook.File{
Reader: resp.Body,
FileName: attach.Filename,
ContentType: discord_webhook.FindContentType(attach.Filename),
}
dFiles = append(dFiles, dFile)
}
message.Attachments = []discord_webhook.Attachment{}
r, err := d.reactionImager.MakeReactionsImage(channel, timestamp)
switch err {
case nil:
dFiles = append(
dFiles,
discord_webhook.File{
FileName: ReactionGifName,
Reader: r,
ContentType: "image/gif",
},
)
case slack_emoji_imager.ErrorNoReactions:
default:
return errors.Wrap(err, "MakeReactionImage")
}
newMessage, err := d.discordHook.Edit(message.ChannelID, message.ID, message, dFiles)
if err != nil {
return errors.Wrap(err, "DiscordMessageEdit")
}
// reset file and image urls of Slack blocks
for i, block := range srcContent.Blocks {
switch block.Type {
case "image":
var attachmentIndex int
var found bool
for j, oldAttachment := range oldAttachments {
// find attachment of the image
if len(newMessage.Attachments) <= j || newMessage.Attachments[j].Filename != oldAttachment.Filename {
continue
}
if oldAttachment.URL != block.ImageURL {
continue
}
found = true
attachmentIndex = j
break
}
if !found {
continue
}
srcContent.Blocks[i] = slack_webhook.ImageBlock(newMessage.Attachments[attachmentIndex].URL, block.AltText)
srcContent.Blocks[i].Title = slack_webhook.ImageTitle(block.Title.Text, false)
case "file":
var attachmentIndex int
var externalID string
var found bool
// find attachment of the file
for j, oldAttachment := range oldAttachments {
externalID = fmt.Sprintf("%s:%s/%s", ProgramName, newMessage.ChannelID, oldAttachment.ID)
if block.ExternalID != externalID || len(newMessage.Attachments) <= j {
continue
}
attachmentIndex = j
found = true
break
}
if !found {
continue
}
sFile, err := d.slackHook.FilesRemoteInfo(externalID, "")
if err != nil {
log.Printf("FilesRemoteInfo: %s\n", err.Error())
continue
}
err = d.slackHook.FilesRemoteRemove(externalID, "")
if err != nil {
log.Printf("FilesRemoteRemove: %s\n", err.Error())
}
externalID = fmt.Sprintf("%s:%s/%s", ProgramName, newMessage.ChannelID, newMessage.Attachments[attachmentIndex].ID)
_, err = d.slackHook.FilesRemoteAdd(
slack_webhook.FilesRemoteAddParameters{
ExternalURL: newMessage.Attachments[attachmentIndex].URL,
Title: sFile.Title,
FileType: sFile.Filetype,
ExternalID: externalID,
},
)
if err != nil {
log.Printf("FilesRemoteAdd: %s\n", err.Error())
continue
}
srcContent.Blocks[i].ExternalID = externalID
}
}
_, err = d.slackHook.Update(*srcContent)
return errors.Wrap(err, "UpdateSlackMessage")
}
func (d *SlackReactionHandler) AddEmoji(name, value string) {
d.reactionImager.AddEmoji(name, value)
}
func (d *SlackReactionHandler) RemoveEmoji(name string) {
d.reactionImager.RemoveEmoji(name)
}
func (d *SlackReactionHandler) GetEmojiURI(name string) string {
return d.reactionImager.GetEmojiURI(name)
}