<script>
	import { tick } from 'svelte';
	import { postToChannel } from '$lib/apiServer';

	export let channel = null;
	let input;
	let value = '';
	let pending = false;

	$: disabled = pending || channel === null;

	async function handleSubmit() {
		if (channel !== null) {
			pending = true;
			// TODO try/catch:
			await postToChannel(channel, value);
			pending = false;
			value = '';
			await tick();
			input.focus();
		}
	}

	function onKeyDown(event) {
		if (!event.altKey && event.key === 'Enter') {
			handleSubmit();
			event.preventDefault();
		}
	}
</script>

<form on:submit|preventDefault={handleSubmit} class="flex flex-row flex-nowrap">
	<textarea
		bind:this={input}
		bind:value
		{disabled}
		on:keydown={onKeyDown}
		type="search"
		class="flex-auto h-6 input rounded-r-none"
	/>
	<button
		color="primary variant-filled-secondary"
		type="submit"
		class="flex-none w-6 h-6 btn-icon variant-filled rounded-l-none">&raquo;</button
	>
</form>
