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<script>
import { run, preventDefault } from 'svelte/legacy';
import { cubicInOut } from "svelte/easing";
import { browser } from "$app/environment";
import { t } from "$lib/translations";
import { format } from "date-fns";
import { scale, fade, fly } from "svelte/transition";
import { enhance } from "$app/forms";
import Avatar from "$comp/Avatar.svelte";
import Icon from "$comp/Icon.svelte";
import { back, fail, focus } from "$lib/utils";
import { sign, send, encrypt, decrypt } from "$lib/nostr";
import { event as e, password } from "$lib/store";
import { tick, onMount } from "svelte";
import { getEventHash } from "nostr-tools";
let { data } = $props();
function fadeScale(
node,
{ delay = 0, duration = 200, easing = (x) => x, baseScale = 0 },
) {
const o = +getComputedStyle(node).opacity;
const m = getComputedStyle(node).transform.match(/scale\(([0-9.]+)\)/);
const s = m ? m[1] : 1;
const is = 1 - baseScale;
return {
delay,
duration,
css: (t) => {
const eased = easing(t);
return `opacity: ${eased * o}; transform: scale(${
eased * s * is + baseScale
})`;
},
};
}
let { messages, recipient, user } = $state(data);
let input, pane = $state();
let initialize = async (p) => {
await Promise.all(
messages.map(
async (event) => (event.message = await decrypt({ event, user })),
),
);
messages = messages;
tick().then(() => pane && (pane.scrollTop = pane.scrollHeight));
};
e.subscribe(async (event) => {
let found = ~messages.findIndex((m) => m.id === event?.id);
if (event?.recipient.id === user.id && !found) {
event.message = await decrypt({ event, user });
messages.push(event);
messages = messages;
tick().then(() => pane && (pane.scrollTop = pane.scrollHeight));
}
});
let sent, submitting, message = $state();
let submit = async () => {
submitting = true;
let event = {
pubkey: user.pubkey,
created_at: Math.floor(Date.now() / 1000),
kind: 4,
tags: [["p", recipient.pubkey]],
};
event.message = message;
message = "";
event.author = user;
event.recipient = recipient;
messages.push(event);
messages = messages;
tick().then(() => pane && (pane.scrollTop = pane.scrollHeight));
try {
event.content = await encrypt({
message: event.message,
recipient: recipient.pubkey,
user,
});
event.id = getEventHash(event);
await sign(event);
await send(event);
sent = true;
} catch (e) {
console.log(e);
fail("Failed to send message");
}
message = "";
submitting = false;
};
let keydown = (e) => {
if (e.key === "Enter") {
e.preventDefault();
submit();
}
};
run(() => {
initialize($password);
});
</script>
<div class="container max-w-xl mx-auto px-4 space-y-5">
<button
type="button"
class="hover:opacity-80"
data-sveltekit-preload-data="false"
onclick={back}
>
<Icon icon="arrow-left" style="w-10" />
</button>
<div
class="h-[50vh] max-h-[50vh] overflow-y-scroll scrollbar-thin scrollbar-thumb-[#F2F6FC] scrollbar-track-white pr-8"
bind:this={pane}
>
{#each messages as { id, author, message, created_at, pubkey }}
{@const ours = pubkey === user.pubkey}
{@const theirs = !ours}
{#if message}
<div
class="flex gap-2"
class:flex-row-reverse={theirs}
class:justify-end={theirs}
in:fadeScale={{
easing: cubicInOut,
baseScale: 0.5,
}}
>
<div
class="rounded-2xl px-4 py-2 max-w-[300px] mb-1 text-lg"
class:ours
class:theirs
:key={id}
>
{message}
</div>
<div class="mt-auto">
<Avatar user={author} size={"12"} />
</div>
</div>
<div class="text-sm text-gray-400 mb-6" class:text-right={ours}>
{format(new Date(created_at * 1000), "MMM d")},
{format(new Date(created_at * 1000), "h:mm aa")}
</div>
{/if}
{/each}
</div>
<form
method="POST"
class="w-full border rounded-xl outline-none gap-4 flex p-0 pr-2"
onsubmit={preventDefault(submit)}
>
<input type="hidden" name="requester_id" value={user.id} />
<input type="hidden" name="recipient" value={recipient.username} />
<div
use:focus
contenteditable
class="grow break-all py-4 outline-none mt-0 pl-4"
bind:innerHTML={message}
onkeydown={keydown}
></div>
<button type="submit" class="my-auto shrink-0">
<Icon icon="send" style="w-8" />
</button>
</form>
</div>
<style>
@reference "../../../../app.css";
.ours {
@apply bg-gradient-to-r from-[#F2F6FC] to-[#E1E3FF] text-black rounded-br-none ml-auto;
}
.theirs {
@apply bg-gray-100 text-black rounded-bl-none;
}
</style>
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