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# RiveScript-JS [![Build Status](https://travis-ci.org/aichaos/rivescript-js.svg?branch=master)](https://travis-ci.org/aichaos/rivescript-js) ## INTRODUCTION This is a RiveScript interpreter library for JavaScript. RiveScript is a scripting language for chatterbots, making it easy to write trigger/response pairs for building up a bot's intelligence. This library can be used both in a web browser or as a Node module. See the `eg/` folder for examples. ## NOTICE: CHANGES IN v2.0.0 RiveScript v2.0.0 comes with a **massive** refactor of the codebase to implement modern Async/Await features all throughout. The refactor now allows features like "storing user variables directly in Redis" or "using asynchronous macros in conditionals" But it necessarily had to break some backwards compatibility -- slightly! -- by turning previously synchronous functions like `reply()` into async ones that return Promises like `replyAsync()` did. See the [Upgrading-v2](https://github.com/aichaos/rivescript-js/blob/master/Upgrading-v2.md) document for information on the changes and how to fix your code for the new version. ## INSTALLATION For nodejs and other similar JavaScript engines, you can install this module in your project through npm: ```bash $ npm install rivescript ``` For the web you can use the unpkg: ```html <script src="https://unpkg.com/rivescript@latest/dist/rivescript.min.js"></script> ``` The git repository for this project includes ES2015+ source code. For ES5 builds targeting older browsers and Node versions, check the [Releases](https://github.com/aichaos/rivescript-js/releases) tab. The compiled distribution includes a `lib/` directory with ES5 sources to use with node <= 6, and a `dist/` directory containing a "browserified" script that can be used on a web page. To use on the web, just load `dist/rivescript.min.js` with a `<script>` tag like usual. ## USAGE ```javascript var bot = new RiveScript(); // Load a directory full of RiveScript documents (.rive files). This is for // Node.JS only: it doesn't work on the web! bot.loadDirectory("brain").then(loading_done).catch(loading_error); // Load an individual file. bot.loadFile("brain/testsuite.rive").then(loading_done).catch(loading_error); // Load a list of files all at once (the best alternative to loadDirectory // for the web!) bot.loadFile([ "brain/begin.rive", "brain/admin.rive", "brain/clients.rive" ]).then(loading_done).catch(loading_error); // All file loading operations are asynchronous, so you need handlers // to catch when they've finished. If you use loadDirectory (or loadFile // with multiple file names), the success function is called only when ALL // the files have finished loading. function loading_done() { console.log("Bot has finished loading!"); // Now the replies must be sorted! bot.sortReplies(); // And now we're free to get a reply from the brain! // RiveScript remembers user data by their username and can tell // multiple users apart. let username = "local-user"; // NOTE: the API has changed in v2.0.0 and returns a Promise now. bot.reply(username, "Hello, bot!").then(function(reply) { console.log("The bot says: " + reply); }); } // It's good to catch errors too! function loading_error(error, filename, lineno) { console.log("Error when loading files: " + error); } ``` ### Interactive shell The distribution of RiveScript.js includes an interactive command-line shell called _**riveshell**_ for testing your RiveScript bot. It takes as argument the path (relative or absolute) to the "brain" - the folder that contains your RiveScript documents (_.rive_ files). - If you installed RiveScript locally via npm (with `npm install rivescript`), you can start the shell using **npx** while in your project folder. Example: ```bash $ npx riveshell /path/to/brain ``` - If you installed RiveScript globally via npm (with `npm install -g rivescript`), you can start the shell from anywhere. Example: ```bash $ riveshell /path/to/brain ``` - If you cloned the repository from GitHub, you can start the shell directly from `shell.js` at the root of the project, using node. Example using the default brain that comes in the _eg/_ folder : ```bash $ node shell.js /eg/brain ``` Once inside the shell you can chat with the bot using the RiveScript files in that directory. For simple debugging you can type `/eval` to run single lines of JavaScript code. See `/help` for more. The shell accepts a few command line parameters: * `--debug`: enables verbose debug logging. * `--watch`: watch the reply folder for changes and automatically reload the bot when files are modified. * `--utf8`: enables UTF-8 mode. ## DOCUMENTATION There is generated Markdown and HTML documentation of the modules in the [docs](https://github.com/aichaos/rivescript-js/tree/master/docs) folder. The main module is at [rivescript](https://github.com/aichaos/rivescript-js/blob/master/docs/rivescript.md). Also check out the [**RiveScript Community Wiki**](https://github.com/aichaos/rivescript/wiki) for common design patterns and tips & tricks for RiveScript. ## EXAMPLES There are examples available in the [eg/](https://github.com/aichaos/rivescript-js/tree/master/eg) directory of this project on GitHub that show how to interface with a RiveScript bot in a variety of ways--such as through a web browser or a telnet server--and other code snippets and useful tricks. ## RIVESCRIPT PLAYGROUND For testing and sharing RiveScript snippets that use the JavaScript implementation, check out the [RiveScript Playground](https://play.rivescript.com/). It's a JSFiddle style web app for playing with RiveScript in your web browser and sharing code with others. <https://play.rivescript.com/> ## UTF-8 SUPPORT Version 1.0.5 adds **experimental** support for UTF-8 in RiveScript documents. It is disabled by default. Enable it by passing a `true` value for the `utf8` option in the constructor. By default (without UTF-8 mode on), triggers may only contain basic ASCII characters (no foreign characters), and the user's message is stripped of all characters except letters, numbers and spaces. This means that, for example, you can't capture a user's e-mail address in a RiveScript reply, because of the @ and . characters. When UTF-8 mode is enabled, these restrictions are lifted. Triggers are only limited to not contain certain metacharacters like the backslash, and the user's message is only stripped of backslashes and HTML angled brackets (to protect from obvious XSS if you use RiveScript in a web application). Additionally, common punctuation characters are stripped out, with the default set being `/[.,!?;:]/g`. This can be overridden by providing a new `RegExp` object as the `rs.unicodePunctuation` attribute. Example: ```javascript // Make a new bot with UTF-8 mode enabled. var bot = new RiveScript({utf8: true}); // Override the punctuation characters that get stripped from the // user's message. bot.unicodePunctuation = new RegExp(/[.,!?;:]/g); ``` The `<star>` tags in RiveScript will capture the user's "raw" input, so you can write replies to get the user's e-mail address or store foreign characters in their name. This has so far only been tested when run under Node. When served through a web server, take extra care that your server sends the correct content encoding with the RiveScript source files (`Content-Type: text/plain; charset=utf-8`). One caveat to watch out for in UTF-8 mode is that punctuation characters are not removed from a user's message, so if they include commas or exclamation marks it can impact the matching ability of your triggers (you should *absolutely not* write an explicit punctuation mark on your trigger's side. Triggers should NOT contain symbols like `?` or `,` even with UTF-8 mode enabled, and while that may work right now, a future update will probably rigidly enforce this). ## BUILDING I use npm run scripts to handle various b
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