frontend/pages/oauth/authorize.vue

<script setup lang="ts">
import { Client } from "@versia/client";
import { AlertCircle, AppWindow, Loader } from "lucide-vue-next";
import { confirmModalService } from "~/components/modals/composable";
import UserAuthForm from "~/components/oauth/login.vue";
import { Alert, AlertDescription, AlertTitle } from "~/components/ui/alert";
import { Button } from "~/components/ui/button";
import * as m from "~/paraglide/messages.js";
import { NuxtLink } from "#components";

useHead({
    title: m.fuzzy_sea_moth_absorb(),
});

const baseUrl = useBaseUrl();
const client = computed(() => new Client(new URL(baseUrl.value)));
const instance = useInstanceFromClient(client);
const {
    error,
    error_description,
    redirect_uri,
    instance_switch_uri,
    response_type,
    client_id,
    scope,
} = useUrlSearchParams();
const hasValidUrlSearchParams =
    redirect_uri && response_type && client_id && scope;

const getHost = (uri: string) => new URL(uri).host;

const changeInstance = async () => {
    const { confirmed, value } = await confirmModalService.confirm({
        title: m.sharp_alive_anteater_fade(),
        inputType: "url",
        message: m.noble_misty_rook_slide(),
    });

    if (confirmed && value) {
        // Redirect to the client's instance switch URI
        const url = new URL(instance_switch_uri as string);

        url.searchParams.set("origin", value);

        await navigateTo(url.toString(), {
            external: true,
        });
    }
};
</script>

<template>
    <div class="container relative flex h-svh flex-col items-center justify-center md:flex-row lg:max-w-none lg:px-0">
        <Button :as="NuxtLink" href="/register" variant="link" class="absolute right-4 top-4 md:right-8 md:top-8">
            {{ m.noble_cute_ocelot_aim() }}
        </Button>
        <div class="relative hidden h-full flex-col bg-muted p-10 text-white dark:border-r lg:flex grow bg-center bg-no-repeat bg-cover"
            :style="{
                backgroundImage: 'url(/images/banner.webp)'
            }">
            <div class="absolute top-0 left-0 w-full h-72 bg-gradient-to-t from-transparent to-black/70" />
            <div class="relative z-20 flex items-center text-lg font-medium">
                <img crossorigin="anonymous"
                    :src="instance?.thumbnail.url || 'https://cdn.versia.pub/branding/icon.svg'" alt="Versia logo"
                    class="size-10 mr-4" />
                {{ instance?.title }}
            </div>
            <!-- <div class="relative z-20 mt-auto">
                <blockquote class="space-y-2">
                    <p class="text-lg">
                        &ldquo;This library has saved me countless hours of work and
                        helped me deliver stunning designs to my clients faster than
                        ever before.&rdquo;
                    </p>
                    <footer class="text-sm">
                        Sofia Davis
                    </footer>
                </blockquote>
            </div> -->
        </div>
        <div class="lg:p-8 w-full max-w-xl">
            <div class="mx-auto flex w-full flex-col justify-center space-y-10 sm:w-[350px]">
                <Alert v-if="error" variant="destructive" class="mb-4">
                    <AlertCircle class="size-4" />
                    <AlertTitle>{{ error }}</AlertTitle>
                    <AlertDescription>
                        {{ error_description }}
                    </AlertDescription>
                </Alert>
                <div class="flex flex-col space-y-2 text-center">
                    <h1 class="text-2xl font-semibold tracking-tight">
                        {{ m.novel_fine_stork_snap() }}
                    </h1>
                    <p class="text-sm text-muted-foreground" v-html="m.smug_main_whale_snip({
                        host: getHost(baseUrl),
                    })">
                    </p>
                </div>
                <template v-if="instance && hasValidUrlSearchParams">
                    <UserAuthForm :instance="instance" />
                    <Button variant="ghost" @click="changeInstance" v-if="instance_switch_uri">
                        <AppWindow />
                        {{ m.muddy_topical_pelican_gasp() }}
                    </Button>
                </template>
                <div v-else-if="hasValidUrlSearchParams" class="p-4 flex items-center justify-center h-48">
                    <Loader class="size-8 animate-spin" />
                </div>
                <Alert v-else variant="destructive" class="mb-4">
                    <AlertCircle class="size-4" />
                    <AlertTitle>{{ m.grand_spry_goldfish_embrace() }}</AlertTitle>
                    <AlertDescription>
                        <p>{{ m.gray_clean_shark_comfort() }}</p>
                        <ul class="list-disc list-inside mt-2 font-mono">
                            <li>redirect_uri</li>
                            <li>response_type</li>
                            <li>client_id</li>
                            <li>scope</li>
                        </ul>
                    </AlertDescription>
                </Alert>
            </div>
        </div>
    </div>
</template>