@akala/core/dist/esm/middlewares/composite-with-priority-sync.js

import { each } from '../each.js';
import { process, convertToErrorMiddleware, convertToMiddleware, isErrorMiddleware, isStandardMiddleware } from './shared.js';
/**
 * A composite middleware class with priority for synchronous operations.
 * @template T - The type of the arguments.
 * @template TSpecialNextParam - The type of the special next parameter.
 */
export class MiddlewareCompositeWithPriority {
    name;
    constructor(name) {
        this.name = name;
    }
    stack = [];
    /**
     * Adds middleware with a specified priority.
     * @param {number} priority - The priority of the middleware (the lowest first).
     * @param {...AnySyncMiddleware<T, TSpecialNextParam>} middlewares - The middlewares to add.
     * @returns {this} The instance of the middleware composite.
     */
    useMiddleware(priority, ...middlewares) {
        this.stack.push(...middlewares.map(m => [priority, m]));
        this.stack.sort((a, b) => a[0] - b[0]);
        return this;
    }
    /**
     * Adds standard middleware with a specified priority.
     * @param {number} priority - The priority of the middleware (the lowest first).
     * @param {...Function} middlewares - The middlewares to add.
     * @returns {this} The instance of the middleware composite.
     */
    use(priority, ...middlewares) {
        return this.useMiddleware(priority, ...middlewares.map(m => convertToMiddleware(m)));
    }
    /**
     * Adds error middleware with a specified priority.
     * @param {number} priority - The priority of the middleware (the lowest first).
     * @param {...Function} middlewares - The middlewares to add.
     * @returns {this} The instance of the middleware composite.
     */
    useError(priority, ...middlewares) {
        return this.useMiddleware(priority, ...middlewares.map(m => convertToErrorMiddleware(m)));
    }
    /**
     * Processes the middleware stack.
     * @param {...T} req - The request parameters.
     * @returns {X} The result of the middleware processing.
     */
    process(...req) {
        return process(this, ...req);
    }
    /**
     * Handles errors in the middleware stack.
     * @param {Error | OptionsResponse} error - The error to handle.
     * @param {...T} req - The request parameters.
     * @returns {MiddlewareResult<TSpecialNextParam>} The result of the error handling.
     */
    handleError(error, ...req) {
        let failed = !!error;
        // this.stack.sort((a, b) => a[0] - b[0]);
        try {
            if (this.stack.length === 0)
                return error;
            each(this.stack, (middleware) => {
                try {
                    if (failed && isErrorMiddleware(middleware[1])) {
                        const err = middleware[1].handleError(error, ...req);
                        if (err === 'break')
                            throw err;
                        if (typeof err != 'string' && typeof err != 'undefined')
                            error = err;
                        failed = true;
                    }
                }
                catch (x) {
                    throw { success: x };
                }
            });
            return error;
        }
        catch (err) {
            switch (typeof err) {
                case 'string':
                    return;
                case 'undefined':
                    return error;
                default:
                    throw err.success;
            }
        }
    }
    /**
     * Handles the middleware stack.
     * @param {...T} req - The request parameters.
     * @returns {MiddlewareResult<TSpecialNextParam>} The result of the middleware handling.
     */
    handle(...req) {
        let error = undefined;
        let failed = undefined;
        // this.stack.sort((a, b) => a[0] - b[0]);
        try {
            if (this.stack.length === 0)
                return error;
            each(this.stack, (middleware) => {
                if (failed && isErrorMiddleware(middleware[1])) {
                    let err;
                    try {
                        err = middleware[1].handleError(error, ...req);
                    }
                    catch (e) {
                        throw { success: e };
                    }
                    if (err === 'break')
                        throw err;
                    if (typeof err != 'string' && typeof err != 'undefined')
                        error = err;
                    failed = true;
                }
                else if (!failed && isStandardMiddleware(middleware[1])) {
                    let err;
                    try {
                        err = middleware[1].handle(...req);
                    }
                    catch (e) {
                        throw { success: e };
                    }
                    if (err === 'break')
                        throw err;
                    if (typeof err != 'string' && typeof err != 'undefined') {
                        if (err['allow'])
                            error['allow'].push(...err['allow']);
                        else
                            error = err;
                    }
                    failed = err instanceof Error;
                }
                else
                    return;
            });
            return error;
        }
        catch (err) {
            switch (typeof err) {
                case 'string':
                    return;
                case 'undefined':
                    return error;
                default:
                    throw err.success;
            }
        }
    }
}
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