alpha-command-bus/compiled/CommandHandlerDescriptor.js

Very simple command bus implementation

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.CommandHandlerDescriptor = void 0;
const alpha_command_bus_command_factory_1 = require("alpha-command-bus-command-factory");
const matchesObject = require('lodash.matches');
class CommandHandlerDescriptor {
    constructor(predicate, func) {
        this.predicate = predicate;
        this.func = func;
        Object.freeze(this);
    }
    static fromFilter(filter, func) {
        return new CommandHandlerDescriptor(CommandHandlerDescriptor.filterToPredicate(filter), func);
    }
    static filterToPredicate(filter) {
        if (typeof filter === 'string') {
            const commandName = filter;
            return (c) => c.command === commandName;
        }
        if (alpha_command_bus_command_factory_1.ShapeCommand.isType(filter)) {
            return (c) => c.command === filter.COMMAND_NAME;
        }
        if (filter instanceof Function) {
            return filter;
        }
        if (typeof filter === 'object') {
            return matchesObject(filter);
        }
        throw new Error('Command predicate has to be a function, a string, an object or class or ShapeCommand.Shape');
    }
}
exports.CommandHandlerDescriptor = CommandHandlerDescriptor;