slack-edge/dist/middleware/built-in-middleware.js

Slack app development framework for edge functions with streamlined TypeScript support

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.urlVerification = void 0;
exports.ignoringSelfEvents = ignoringSelfEvents;
/**
 * Built-in middleware to handle url_verification requests.
 * @param req request
 * @returns response if needed
 */
// deno-lint-ignore require-await
const urlVerification = async (req) => {
    if (req.body.type === "url_verification") {
        return { status: 200, body: req.body.challenge };
    }
};
exports.urlVerification = urlVerification;
const eventTypesToKeep = ["member_joined_channel", "member_left_channel"];
/**
 * Built-in middleware bypass self-generated events for preventing an infinite loop of self-responses.
 * @param req request
 * @returns response if needed
 */
function ignoringSelfEvents(ignoreSelfAssistantMessageEvents) {
    // deno-lint-ignore require-await
    return async (req) => {
        if (req.body.event) {
            if (eventTypesToKeep.includes(req.body.event.type)) {
                return;
            }
            const auth = req.context.authorizeResult;
            const isSelfEvent = auth.botId === req.body.event.bot_id || auth.botUserId === req.context.userId;
            if (isSelfEvent) {
                if (!ignoreSelfAssistantMessageEvents && req.body.event.type === "message" && req.body.event.channel_type === "im") {
                    // Assistant#botMessage handles this pattern
                    return;
                }
                return { status: 200, body: "" };
            }
        }
    };
}
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