mautrix-discord/database/attachment.go

package database

import (
	"database/sql"
	"errors"

	log "maunium.net/go/maulogger/v2"

	"maunium.net/go/mautrix/id"
	"maunium.net/go/mautrix/util/dbutil"
)

type Attachment struct {
	db  *Database
	log log.Logger

	Channel PortalKey

	DiscordMessageID    string
	DiscordAttachmentID string
	MatrixEventID       id.EventID
}

func (a *Attachment) Scan(row dbutil.Scannable) *Attachment {
	err := row.Scan(
		&a.Channel.ChannelID, &a.Channel.Receiver,
		&a.DiscordMessageID, &a.DiscordAttachmentID,
		&a.MatrixEventID)

	if err != nil {
		if !errors.Is(err, sql.ErrNoRows) {
			a.log.Errorln("Database scan failed:", err)
		}

		return nil
	}

	return a
}

func (a *Attachment) Insert() {
	query := "INSERT INTO attachment" +
		" (channel_id, receiver, discord_message_id, discord_attachment_id, " +
		" matrix_event_id) VALUES ($1, $2, $3, $4, $5);"

	_, err := a.db.Exec(
		query,
		a.Channel.ChannelID, a.Channel.Receiver,
		a.DiscordMessageID, a.DiscordAttachmentID,
		a.MatrixEventID,
	)

	if err != nil {
		a.log.Warnfln("Failed to insert attachment for %s@%s: %v", a.Channel, a.DiscordMessageID, err)
	}
}

func (a *Attachment) Delete() {
	query := "DELETE FROM attachment WHERE" +
		" channel_id=$1 AND receiver=$2 AND discord_attachment_id=$3 AND" +
		" matrix_event_id=$4"

	_, err := a.db.Exec(
		query,
		a.Channel.ChannelID, a.Channel.Receiver,
		a.DiscordAttachmentID, a.MatrixEventID,
	)

	if err != nil {
		a.log.Warnfln("Failed to delete attachment for %s@%s: %v", a.Channel, a.DiscordAttachmentID, err)
	}
}