[v9] Pinメッセージ機能の実装 #229

Aqua-218 · 2026-01-28T12:34:56Z

Overview

Pin機能の実装

Issue

Copilot

Pull request overview

This PR implements a Pin feature for a Discord bot, allowing users to pin messages that will be automatically reposted when new messages arrive in the channel. The implementation adds three commands: /pin (via modal), /unpin, and a message context menu option to pin selected messages.

Changes:

Added pin command infrastructure with modal-based and context menu-based pinning
Implemented automatic message resending when new messages arrive in channels with pinned content
Added database operations for managing pin settings per channel

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 16 comments.

Show a summary per file

File	Description
src/internal/repository/pin_setting.go	Adds DeleteByChannelID method to support unpinning by channel
src/internal/bot/handler/messageCreate.go	Implements automatic resending of pinned messages on new message events
src/internal/bot/handler/interaction.go	Adds modal submit handling for pin feature
src/internal/bot/command/registry.go	Registers pin, unpin, and pin select commands
src/internal/bot/command/general/pin.go	Implements /pin command with modal interface and permission checks
src/internal/bot/command/general/unpin.go	Implements /unpin command to remove pinned messages
src/internal/bot/command/general/pin_select.go	Implements message context menu for pinning selected messages
src/internal/bot/command/general/pin_modal.go	Handles modal submission for pin command
src/internal/bot/command/commands.go	Registers command contexts for pin-related commands

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src/internal/bot/command/commands.go

Copilot · 2026-01-28T12:41:20Z

src/internal/bot/handler/messageCreate.go

+	// 自分のピン留めメッセージの場合は無視
+	if r.Author != nil && r.Author.ID == s.State.User.ID {
+		if len(r.Embeds) == 0 {
+			return
+		}
+		if r.Embeds[0].Footer != nil && strings.Contains(r.Embeds[0].Footer.Text, "Pinned Message") {
+			return
+		}


The check for bot's own messages is incomplete. When r.Author is nil (which can happen in certain edge cases), the code will skip the embed check and proceed to resend the pinned message. This could cause the bot to enter an infinite loop where it keeps deleting and resending its own pinned messages. Move the bot check to be a top-level check before line 91, similar to the pattern at lines 26-29.

Suggested change

// 自分のピン留めメッセージの場合は無視

if r.Author != nil && r.Author.ID == s.State.User.ID {

if len(r.Embeds) == 0 {

return

}

if r.Embeds[0].Footer != nil && strings.Contains(r.Embeds[0].Footer.Text, "Pinned Message") {

return

}

// 自分のメッセージや Author が存在しないメッセージの場合は無視

if r.Author == nil || r.Author.ID == s.State.User.ID {

return

src/internal/bot/command/general/pin_modal.go

Copilot · 2026-01-28T12:41:21Z

src/internal/bot/command/general/pin_modal.go

+	repo := repository.NewPinSettingRepository(ctx.DB)
+	setting := &model.PinSetting{
+		ID:        i.ChannelID,
+		URL:       sentMessage.ID,
+		Title:     "Pinned Message",
+		Content:   message,
+		GuildID:   i.GuildID,
+		ChannelID: i.ChannelID,
+	}
+
+	if err := repo.Update(setting); err != nil {
+		if err := repo.Create(setting); err != nil {
+			replyPinError(s, i, config, "エラー", "ピン留めの保存に失敗しました。")
+			return true
+		}
+	}


The pin modal handler does not check if a pinned message already exists in the channel, unlike the PinSelect function which properly validates this at lines 61-64 in pin_select.go. This inconsistency means that using the modal via /pin command could overwrite existing pins without warning, while using the message context menu will reject the operation. Consider adding the same check here: query for existing settings and either reject with an error message or explicitly handle the overwrite case.

Copilot · 2026-01-28T12:41:21Z

src/internal/bot/command/general/pin_select.go

+	sentMessage, err := s.ChannelMessageSendEmbed(i.ChannelID, embed)
+	if err != nil {
+		replyPinError(s, i, config, "エラー", "メッセージの送信に失敗しました。")
+		return
+	}
+
+	setting := &model.PinSetting{
+		ID:        i.ChannelID,
+		URL:       sentMessage.ID,
+		Title:     "Pinned Message",
+		Content:   targetMsg.Content,
+		GuildID:   i.GuildID,
+		ChannelID: i.ChannelID,
+	}
+
+	err = repo.Create(setting)
+	if err != nil {
+		replyPinError(s, i, config, "エラー", "ピン留めの保存に失敗しました。")
+		return
+	}


In the pin message context menu handler, after successfully pinning a message, there is no cleanup of the old pinned message if one exists. Unlike the modal handler and resendPinnedMessage function, this code doesn't check for or delete existing pinned messages before creating a new one. This is inconsistent with the error check at lines 61-64 which prevents creating a second pin. If that check were ever removed or if there's a race condition, this could result in multiple pinned messages accumulating in the channel. Consider deleting the old pinned message if settings already exist before the check at line 61.

Copilot · 2026-01-28T12:41:23Z

src/internal/bot/command/general/pin_modal.go

+
+func replyPinSuccess(s *discordgo.Session, i *discordgo.InteractionCreate, config *internal.Config, title string) {
+	_ = s.InteractionRespond(i.Interaction, &discordgo.InteractionResponse{
+		Type: discordgo.InteractionResponseChannelMessageWithSource,
+		Data: &discordgo.InteractionResponseData{
+			Embeds: []*discordgo.MessageEmbed{
+				{
+					Title:     title,
+					Color:     config.Colors.Success,
+					Timestamp: time.Now().Format(time.RFC3339),
+				},
+			},
+			Flags: discordgo.MessageFlagsEphemeral,
+		},
+	})
+}


The replyPinSuccess function is defined but never used anywhere in the codebase. Consider removing this unused function to reduce code clutter and maintenance burden.

Suggested change

func replyPinSuccess(s *discordgo.Session, i *discordgo.InteractionCreate, config *internal.Config, title string) {

_ = s.InteractionRespond(i.Interaction, &discordgo.InteractionResponse{

Type: discordgo.InteractionResponseChannelMessageWithSource,

Data: &discordgo.InteractionResponseData{

Embeds: []*discordgo.MessageEmbed{

{

Title: title,

Color: config.Colors.Success,

Timestamp: time.Now().Format(time.RFC3339),

},

},

Flags: discordgo.MessageFlagsEphemeral,

},

})

}

Copilot · 2026-01-28T12:41:23Z

src/internal/bot/command/general/pin.go

+						CustomID:    "message",
+						Label:       "投稿内容",
+						Style:       discordgo.TextInputParagraph,
+						Placeholder: "投稿内容を入力してください。すでにPinされたメッセージがある場合は上書きされます。",


The modal placeholder text states "すでにPinされたメッセージがある場合は上書きされます" (existing pinned messages will be overwritten), but this contradicts the actual behavior in pin_select.go (lines 61-64) which prevents pinning when a message already exists. This discrepancy in the user-facing message creates confusion about the expected behavior. Ensure the placeholder text accurately reflects the actual implementation, or align the implementation with this stated behavior by allowing overwrites.

src/internal/bot/command/general/pin_modal.go

Copilot · 2026-01-28T12:41:24Z

src/internal/bot/command/general/unpin.go

+	err = repo.DeleteByChannelID(i.ChannelID)
+	if err != nil {
+		replyPinError(s, i, config, "エラーが発生しました", "ピン留めの解除中にエラーが発生しました。")
+		return
+	}


The unpin command deletes the pin setting from the database but does not delete the actual pinned message from the Discord channel. Users will see the pinned message remain in the channel even after unpinning. Before deleting from the database (line 49), iterate through the settings and delete each message using s.ChannelMessageDelete(i.ChannelID, setting.URL) to clean up the Discord channel as well.

Copilot · 2026-01-28T12:41:24Z

src/internal/repository/pin_setting.go

+func (r *PinSettingRepository) DeleteByChannelID(channelID string) error {
+	return r.db.Delete(&model.PinSetting{}, "channel_id = ?", channelID).Error
+}


The newly added DeleteByChannelID method lacks test coverage. The repository test file (pin_setting_test.go) contains comprehensive tests for other methods but does not test this new functionality. Add test cases to verify that DeleteByChannelID correctly deletes all pin settings for a given channel ID, preserves settings for other channels, and handles non-existent channel IDs appropriately.

Aqua-218 added 9 commits January 28, 2026 21:21

pinコマンド追加

cc7ce6e

unpinコマンド追加

8a778e4

pin選択コマンド追加

2fe6582

pinモーダル追加

4e600c5

pin設定削除追加

e10b010

pinモーダル受付

8ece8ec

pin再送処理

42e4818

pinコマンド登録

4c38ca4

pinハンドラ登録

444629b

Aqua-218 requested a review from a team as a code owner January 28, 2026 12:34

Copilot AI review requested due to automatic review settings January 28, 2026 12:34

Copilot started reviewing on behalf of Aqua-218 January 28, 2026 12:35 View session

Copilot AI reviewed Jan 28, 2026

View reviewed changes

yuito-it added the kind/feature 新機能のリクエスト label Jan 28, 2026

yuito-it added this to UniBot Feature Relase Jan 28, 2026

github-project-automation bot moved this to Untouched in UniBot Feature Relase Jan 28, 2026

yuito-it assigned Aqua-218 Jan 28, 2026

yuito-it added this to the v9 - Go Edition milestone Jan 28, 2026

yuito-it linked an issue Jan 28, 2026 that may be closed by this pull request

[v9] Pin メッセージ #213

Open

yuito-it moved this from Untouched to In Review in UniBot Feature Relase Jan 28, 2026

yuito-it changed the title ~~Feat/go pin~~ [v9] Pinメッセージ機能の実装 Jan 28, 2026

pinコマンドからスケジュール機能を削除し、ピンエラー応答にリクエスト者情報を追加

2da0ffd

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[v9] Pinメッセージ機能の実装 #229

[v9] Pinメッセージ機能の実装 #229

Aqua-218 commented Jan 28, 2026

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Aqua-218 commented Jan 28, 2026

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