fix #64 footerにタイムスタンプを表示するように修正

libs/message.mts

@@ -2,7 +2,7 @@ import { PrismaClient, Message, User } from "@prisma/client"
 import { access, readFile, constants, readdir } from "node:fs/promises"
 import { statSync } from "node:fs"
 import { join } from "node:path"
-import { formatISO, fromUnixTime } from "date-fns"
+import { format, formatISO, fromUnixTime } from "date-fns"
 import { WebClient as SlackClient } from "@slack/web-api"
 import { FileElement } from "@slack/web-api/dist/response/ChatPostMessageResponse"
 import { ChannelType, EmbedType } from "discord.js"
@@ -226,7 +226,7 @@ export class MessageClient {
     maxFileSize: 8000000 | 50000000 | 100000000
   ) {
     // Get post timestamp of message
-    const timestamp = formatISO(fromUnixTime(parseFloat(message.timestamp)))
+    const timestamp = fromUnixTime(parseFloat(message.timestamp))
 
     let authorTypeIcon: "🟢" | "🔵" | "🤖" = "🟢"
     if (message.authorType === 2) authorTypeIcon = "🔵"
@@ -248,11 +248,14 @@ export class MessageClient {
           type: EmbedType.Rich,
           color: message.authorColor,
           description: content,
-          timestamp: timestamp,
+          timestamp: formatISO(timestamp),
           author: {
             name: `${authorTypeIcon} ${message.authorName}`,
             icon_url: message.authorImageUrl,
           },
+          footer: {
+            text: format(timestamp, "yyyy/MM/dd HH:mm"),
+          },
         },
       ]