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96 lines
4.0 KiB
Markdown
96 lines
4.0 KiB
Markdown
# Hydrogen View SDK
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The Hydrogen view SDK allows developers to integrate parts of the Hydrogen application into the UI of their own application. Hydrogen is written with the MVVM pattern, so to construct a view, you'd first construct a view model, which you then pass into the view. For most view models, you will first need a running client.
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## Example
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The Hydrogen SDK requires some assets to be shipped along with your app for things like downloading attachments, and end-to-end encryption. A convenient way to make this happen is provided by the SDK (importing `hydrogen-view-sdk/paths/vite`) but depends on your build system. Currently, only [vite](https://vitejs.dev/) is supported, so that's what we'll be using in the example below.
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You can create a vite project using the following commands:
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```sh
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# you can pick "vanilla-ts" here for project type if you're not using react or vue
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yarn create vite
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cd <your-project-name>
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yarn
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yarn add hydrogen-view-sdk
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```
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You should see a `index.html` in the project root directory, containing an element with `id="app"`. Add the attribute `class="hydrogen"` to this element, as the CSS we'll include from the SDK assumes for now that the app is rendered in an element with this classname.
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If you go into the `src` directory, you should see a `main.ts` file. If you put this code in there, you should see a basic timeline after login and initial sync have finished (might take a while before you see anything on the screen actually).
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You'll need to provide the username and password of a user that is already in the [#element-dev:matrix.org](https://matrix.to/#/#element-dev:matrix.org) room (or change the room id).
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```ts
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import {
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Platform,
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Client,
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LoadStatus,
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createNavigation,
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createRouter,
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RoomViewModel,
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TimelineView
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} from "hydrogen-view-sdk";
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import assetPaths from "hydrogen-view-sdk/paths/vite";
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import "hydrogen-view-sdk/style.css";
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async function main() {
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const app = document.querySelector<HTMLDivElement>('#app')!
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const config = {};
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const platform = new Platform(app, assetPaths, config, { development: import.meta.env.DEV });
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const navigation = createNavigation();
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platform.setNavigation(navigation);
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const urlRouter = createRouter({
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navigation: navigation,
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history: platform.history
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});
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urlRouter.attach();
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const client = new Client(platform);
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const loginOptions = await client.queryLogin("matrix.org").result;
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client.startWithLogin(loginOptions.password("username", "password"));
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await client.loadStatus.waitFor((status: string) => {
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return status === LoadStatus.Ready ||
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status === LoadStatus.Error ||
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status === LoadStatus.LoginFailed;
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}).promise;
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if (client.loginFailure) {
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alert("login failed: " + client.loginFailure);
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} else if (client.loadError) {
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alert("load failed: " + client.loadError.message);
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} else {
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const {session} = client;
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// looks for room corresponding to #element-dev:matrix.org, assuming it is already joined
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const room = session.rooms.get("!bEWtlqtDwCLFIAKAcv:matrix.org");
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const vm = new RoomViewModel({
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room,
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ownUserId: session.userId,
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platform,
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urlCreator: urlRouter,
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navigation,
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});
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await vm.load();
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const view = new TimelineView(vm.timelineViewModel);
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app.appendChild(view.mount());
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}
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}
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main();
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```
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## Typescript support
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There is partial typescript support while we are still in the process of converting the Hydrogen codebase to typesccript.
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## API Stability
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This library follows semantic versioning; there is no API stability promised as long as the major version is still 0. Once 1.0.0 is released, breaking changes will be released with a change in major versioning.
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## Third-party licenses
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This package bundles the bs58 package ([license](https://github.com/cryptocoinjs/bs58/blob/master/LICENSE)), and the Inter font ([license](https://github.com/rsms/inter/blob/master/LICENSE.txt)).
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