charisma-sdk-js
Charisma.ai SDK for Javascript (browser)
Last updated 2 years ago by benhjames .
MIT · Repository · Original npm · Tarball · package.json
$ cnpm install charisma-sdk-js 
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Charisma.ai SDK for JavaScript

Usage

yarn add charisma-sdk-js

The script can be pulled straight into the browser.

<script src="./charisma-sdk.js"></script>
<script>
  (async function () {
    const charisma = await Charisma.connect({ storyId: 13 });
    charisma.on('start-typing', () => { ... });
    charisma.on('stop-typing', () => { ... });

    charisma.on('reply', (data) => {
      if (data.reply.speech) {
        charisma.speak(data.reply.speech.data);
      }
    });

    charisma.start({ ... });
    charisma.reply({ ... });
  }){}
</script>

Charisma.connect

Use this to connect to Charisma and set up a new playthrough.

  • storyId (number): The id of the story that you want to create a new playthrough for. The story must be published, unless a Charisma.ai user token has been passed and the user matches the owner of the story.
  • version (number, optional): The version of the story that you want to create a new playthrough for. If omitted, it will default to the most recent version. To get the debug story, pass -1.
  • userToken (string, optional): If the story is unpublished, pass a userToken to be able to access your story.

Returns a promise that resolves once the socket has connected.

const charisma = await Charisma.connect({
  "storyId": 12,
  "version": 4,
  "userToken": "..."
})

Events

To interact with the story, events are sent backwards and forwards along the websocket.

Events sent from client

charisma.start({ ... })

{
  "startNodeId": 12, // Optional, default undefined
  "speech": true // Optional, default false
}

charisma.reply({ ... })

{
  "message": "Please reply to this!",
  "speech": true // Optional, default false
}

Events received by client

charisma.on('reply', (data) => { ... })

{
  "reply": {
    "message": "Greetings and good day.",
    "character": "Ted Baker",
    "avatar": "https://s3.charisma.ai/...",
    "speech": "...", // Stringified buffer
    "metadata": {
      "myMetadata": "someValue"
    }
  },
  "endStory": false,
  "path": [{ "id": 1, "type": "edge" }, { "id": 2, "type": "node" }]
}

charisma.on('start-typing', () => { ... })

This event has no additional data.

charisma.on('stop-typing', () => { ... })

This event has no additional data.

charisma.on('recognise', (message) => { ... })

To be used in conjunction with speech recognition (see below).

charisma.on('recognise-interim', (message) => { ... })

To be used in conjunction with speech recognition (see below).

Utils

To help you with speech-to-text and text-to-speech:

charisma.speak(data)

e.g.

charisma.on("reply", data => {
  if (data.reply.speech) {
    charisma.speak(data.reply.speech.data);
  }
});

charisma.startListening()

Starts browser speech recognition (Google Chrome only). charisma will then emit recognise-interim (player hasn't finished speaking, this is the current best guess) and recognise (player has finished speaking and we're confident about the result) events.

The speech recognition will automatically pause when a character is speaking via charisma.speak.

charisma.stopListening()

Stops browser speech recognition (Google Chrome only).

Questions

For further details or any questions, feel free to get in touch with ben@charisma.ai

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