/*
 * Permanent Discord links. CDN URLs expire; the message link never does.
 */

/** `discord.com/channels/<guildId|@me>/<channelId>/<messageId>`, or null without a message. */
export function messageUrlFor(
    guildId: string | null,
    channelId: string,
    messageId: string | null
): string | null {
    if (!messageId) return null;
    const scope = guildId ?? "@me";
    return `https://discord.com/channels/${scope}/${channelId}/${messageId}`;
}