Slack MCP Server

export function getConfig() {
    const token = process.env.SLACK_BOT_TOKEN;
    if (!token) {
        throw new Error('SLACK_BOT_TOKEN environment variable is required. ' +
            'Create a Slack app and add a Bot Token with the necessary scopes.');
    }
    // Parse SLACK_CHANNELS as comma-separated list of channel names/IDs
    const channelsEnv = process.env.SLACK_CHANNELS;
    const allowedChannels = channelsEnv
        ? channelsEnv.split(',').map((c) => c.trim()).filter(Boolean)
        : undefined;
    return {
        token,
        defaultChannel: process.env.SLACK_DEFAULT_CHANNEL,
        allowedChannels,
    };
}
export function validateChannel(channel) {
    const config = getConfig();
    // If no allowed channels configured, allow all
    if (!config.allowedChannels || config.allowedChannels.length === 0) {
        return channel;
    }
    // If no channel specified, use first allowed channel
    if (!channel) {
        return config.allowedChannels[0];
    }
    // Check if channel is in allowed list (by name or ID)
    const isAllowed = config.allowedChannels.some((allowed) => allowed === channel || allowed === `#${channel}` || `#${allowed}` === channel);
    if (!isAllowed) {
        throw new Error(`Channel "${channel}" is not in the allowed list. ` +
            `Allowed channels: ${config.allowedChannels.join(', ')}`);
    }
    return channel;
}
export function getAllowedChannelsForSearch() {
    const config = getConfig();
    return config.allowedChannels;
}
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