curli-bus/dist/Handlers/HandlersCollection.js

Simple Command Bus Implementation (CQRS) for NodeJS/Typescript.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const HandlerModel_1 = require("./HandlerModel");
class HandlersCollection {
    constructor() {
        this.collection = [];
    }
    add(commandName, handler) {
        this.checkIfAlreadyExistCommandWithSameName(commandName);
        this.collection.push(new HandlerModel_1.HandlerModel(commandName, handler));
    }
    dispatch(commandName, command, options) {
        let result;
        const handlerModel = this.findHandlerByCommand(commandName);
        if (handlerModel) {
            result = handlerModel.callHandler(command, options);
        }
        else {
            throw new Error('Unable to find a handler for the command ' + commandName + '.');
        }
        return result;
    }
    checkIfAlreadyExistCommandWithSameName(commandName) {
        if (this.findHandlerByCommand(commandName)) {
            throw new Error('This command (' + commandName + ') is already registered.');
        }
    }
    findHandlerByCommand(commandName) {
        return this.collection.find((handlerModel) => {
            return handlerModel.isThisCommandName(commandName);
        });
    }
}
exports.HandlersCollection = HandlersCollection;