@xmtp/content-type-reaction
v1.1.10
Published
An XMTP content type to support reactions to messages
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8,201
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Reaction content type
This package provides an XMTP content type to support reactions to messages.
Open for feedback
You are welcome to provide feedback on this implementation by commenting on the Proposal for emoji reactions content type.
What’s a reaction?
A reaction is a quick and often emoji-based way to respond to a message. Reactions are usually limited to a predefined set of emojis or symbols provided by the messaging app.
Why reactions?
Providing message reactions in your app enables users to easily express a general sentiment or emotion toward a message. It also provides a handy way to acknowledge a message or show a particular emotional reaction without engaging in a detailed response.
Install the package
# npm
npm i @xmtp/content-type-reaction
# yarn
yarn add @xmtp/content-type-reaction
# pnpm
pnpm i @xmtp/content-type-reaction
Create a reaction
With XMTP, reactions are represented as objects with the following keys:
reference
: The message ID for the message that is being reacted toaction
: The action of the reaction (added
orremoved
)content
: A string representation of a reaction (e.g.smile
) to be interpreted by clients
const reaction: Reaction = {
reference: someMessageID,
action: "added",
content: "smile",
};
Send a reaction
Now that you have a reaction, you can send it:
await conversation.messages.send(reaction, {
contentType: ContentTypeReaction,
});
Note
contentFallback
text is provided by the codec and gives clients that don't support a content type the option to display some useful context. For cases where clients do support the content type, they can use the content fallback as alt text for accessibility purposes.
Receive a reaction
Now that you can send a reaction, you need a way to receive a reaction. For example:
// Assume `loadLastMessage` is a thing you have
const message: DecodedMessage = await loadLastMessage();
if (!message.contentType.sameAs(ContentTypeReaction)) {
// We do not have a reaction. A topic for another blog post.
return;
}
// We've got a reaction.
const reaction: Reaction = message.content;
Display the reaction
Generally, reactions should be interpreted as emoji. So, smile
would translate to :smile: in UI clients. That being said, how you ultimately choose to render a reaction in your app is up to you.
Developing
Run yarn dev
to build the content type and watch for changes, which will trigger a rebuild.
Testing
Before running unit tests, start the required Docker container at the root of this repository. For more info, see Running tests.
Useful commands
yarn build
: Builds the content typeyarn clean
: Removesnode_modules
,dist
, and.turbo
foldersyarn dev
: Builds the content type and watches for changes, which will trigger a rebuildyarn lint
: Runs ESLintyarn test:setup
: Starts a necessary docker container for testingyarn test:teardown
: Stops docker container for testingyarn test
: Runs all unit testsyarn typecheck
: Runstsc