chat-commander/lib/index.js

chat command parser engine

"use strict"

const Promise = require("bluebird")
const Group = require("./group")

class Commander extends Group {
	constructor(sep = "/") {
		super("", sep)
	}

	get allCommands() {
		return this._buildCommands()
	}

	findCommand(message) {
		const text = message.trim().toLowerCase()
		const commands = this.allCommands

		const names = Object.keys(commands)
		const name = names.find(name => text.match(new RegExp("^" + name, "i")))

		if (!name) return {}
		return {
			command: commands[name],
			request: message.trim().replace(new RegExp("^" + name + "\\s*", "i"), ""),
			name: name
		}
	}

	execute(message, context) {
		// split / find command
		const parsed = message.command? message: this.findCommand(message)

		// no command found
		if (!parsed.command) return Promise.reject("commander")
		const request = parsed.command.parse(parsed.request, context)

		return Promise.try(() => parsed.command.call(request, context))
	}

	static get commands() {
		return {
			help: require("./commands/help")
		}
	}
}

module.exports = Commander