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chore: implement Internet Identity example recommendations #1033

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Original file line number Diff line number Diff line change
Expand Up @@ -10,20 +10,19 @@ img {
margin: auto;
}

form {
#buttons {
display: flex;
justify-content: center;
gap: 0.5em;
flex-flow: row wrap;
max-width: 40vw;
margin: auto;
gap: 1.5em;
flex-direction: column;
width: max-content;
margin: 1.5em auto;
align-items: baseline;
}

button[type="submit"] {
button {
padding: 5px 20px;
margin: 10px auto;
float: right;
width: 100%;
}

#greeting {
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Original file line number Diff line number Diff line change
Expand Up @@ -11,15 +11,10 @@
<body>
<main>
<img src="logo2.svg" alt="DFINITY logo" />
<br />
<br />
<form>
<button id="login">Login!</button>
</form>
<br />
<form>
<button id="greet">Click Me!</button>
</form>
<section id="buttons">
<button id="login" type="button" disabled>Login!</button>
<button id="greet" type="button" disabled>Click Me!</button>
</section>
<section id="greeting"></section>
</main>
</body>
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Original file line number Diff line number Diff line change
@@ -1,48 +1,61 @@
import {createActor, greet_backend} from "../../declarations/greet_backend";
import {AuthClient} from "@dfinity/auth-client"
import {HttpAgent} from "@dfinity/agent";
import { createActor, greet_backend } from "../../declarations/greet_backend";
import { AuthClient } from "@dfinity/auth-client";
import { HttpAgent } from "@dfinity/agent";

let actor = greet_backend;
// Global variables for convenience while you're becoming familiar with the interface. You should use local variables or closures in production
window.greetActor;
window.authClient;

const greetButton = document.getElementById("greet");
greetButton.onclick = async (e) => {
e.preventDefault();
const loginButton = document.getElementById("login");

greetButton.setAttribute("disabled", true);
AuthClient.create().then((client) => {
// Put this on the window so we can access it from the console. This is helpful for learning, but it's recommended to keep it in a closure in a real app.
window.authClient = client;
// We can use the authClient to check if the user is already authenticated
setActor(client);

// Now that the auth client is created, we can enable the login and greet buttons
loginButton.removeAttribute("disabled");
greetButton.removeAttribute("disabled");
});

loginButton.onclick = () => {
// start the login process and wait for it to finish
window.authClient.login({
identityProvider: process.env.II_URL,
onSuccess: () => {
setActor(window.authClient);
},

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Do you remove the login button onSuccess?

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No, I didn't notice that logic in the original version

onError: (err) => {
console.error(err);
},
});
};

// Interact with backend actor, calling the greet method
const greeting = await actor.greet();
greetButton.onclick = async () => {
// Disable the button to prevent multiple clicks
greetButton.setAttribute("disabled", true);

greetButton.removeAttribute("disabled");
// Interact with backend actor, calling the greet method
const greeting = await window.greetActor.greet();

document.getElementById("greeting").innerText = greeting;
greetButton.removeAttribute("disabled");

return false;
document.getElementById("greeting").innerText = greeting;
};

const loginButton = document.getElementById("login");
loginButton.onclick = async (e) => {
e.preventDefault();

// create an auth client
let authClient = await AuthClient.create();

// start the login process and wait for it to finish
await new Promise((resolve) => {
authClient.login({
identityProvider: process.env.II_URL,
onSuccess: resolve,
});
});

// At this point we're authenticated, and we can get the identity from the auth client:
const identity = authClient.getIdentity();
// Using the identity obtained from the auth client, we can create an agent to interact with the IC.
const agent = new HttpAgent({identity});
// Using the interface description of our webapp, we create an actor that we use to call the service methods.
actor = createActor(process.env.GREET_BACKEND_CANISTER_ID, {
agent,
});

return false;
};
/**
* Sets the actor to be used by the greet button
* @param {AuthClient} an initialized AuthClient, which will have the identity of the user (logged in or not)
*/
function setActor(authClient) {
// At this point we're authenticated, and we can get the identity from the auth client:
const identity = authClient.getIdentity();
// Using the identity obtained from the auth client, we can create an agent to interact with the IC.
const agent = new HttpAgent({ identity });
// Using the interface description of our webapp, we create an actor that we use to call the service methods.
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window.greetActor = createActor(process.env.GREET_BACKEND_CANISTER_ID, {
agent,
});
}
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