misskey/packages/frontend/src/components/MkChannelPreview.vue

<!--
SPDX-FileCopyrightText: syuilo and other misskey contributors
SPDX-License-Identifier: AGPL-3.0-only
-->

<template>
<div style="position: relative;">
	<MkA :to="`/channels/${channel.id}`" class="eftoefju _panel" tabindex="-1" @click="updateLastReadedAt">
		<div class="banner" :style="bannerStyle">
			<div class="fade"></div>
			<div class="name"><i class="ti ti-device-tv"></i> {{ channel.name }}</div>
			<div v-if="channel.isSensitive" class="sensitiveIndicator">{{ i18n.ts.sensitive }}</div>
			<div class="status">
				<div>
					<i class="ti ti-users ti-fw"></i>
					<I18n :src="i18n.ts._channel.usersCount" tag="span" style="margin-left: 4px;">
						<template #n>
							<b>{{ channel.usersCount }}</b>
						</template>
					</I18n>
				</div>
				<div>
					<i class="ti ti-pencil ti-fw"></i>
					<I18n :src="i18n.ts._channel.notesCount" tag="span" style="margin-left: 4px;">
						<template #n>
							<b>{{ channel.notesCount }}</b>
						</template>
					</I18n>
				</div>
			</div>
		</div>
		<article v-if="channel.description">
			<p :title="channel.description">{{ channel.description.length > 85 ? channel.description.slice(0, 85) + '…' : channel.description }}</p>
		</article>
		<footer>
			<span v-if="channel.lastNotedAt">
				{{ i18n.ts.updatedAt }}: <MkTime :time="channel.lastNotedAt"/>
			</span>
		</footer>
	</MkA>
	<div
		v-if="channel.lastNotedAt && (channel.isFavorited || channel.isFollowing) && (!lastReadedAt || Date.parse(channel.lastNotedAt) > lastReadedAt)"
		class="indicator"
	></div>
</div>
</template>

<script lang="ts" setup>
import { computed, ref, watch } from 'vue';
import { i18n } from '@/i18n.js';
import { miLocalStorage } from '@/local-storage.js';

const props = defineProps<{
	channel: Record<string, any>;
}>();

const getLastReadedAt = (): number | null => {
	return miLocalStorage.getItemAsJson(`channelLastReadedAt:${props.channel.id}`) ?? null;
};

const lastReadedAt = ref(getLastReadedAt());

watch(() => props.channel.id, () => {
	lastReadedAt.value = getLastReadedAt();
});

const updateLastReadedAt = () => {
	lastReadedAt.value = props.channel.lastNotedAt ? Date.parse(props.channel.lastNotedAt) : Date.now();
};

const bannerStyle = computed(() => {
	if (props.channel.bannerUrl) {
		return { backgroundImage: `url(${props.channel.bannerUrl})` };
	} else {
		return { backgroundColor: '#4c5e6d' };
	}
});
</script>

<style lang="scss" scoped>
.eftoefju {
	display: block;
	overflow: hidden;
	width: 100%;

	&:hover {
		text-decoration: none;
	}

	> .banner {
		position: relative;
		width: 100%;
		height: 200px;
		background-position: center;
		background-size: cover;

		> .fade {
			position: absolute;
			bottom: 0;
			left: 0;
			width: 100%;
			height: 64px;
			background: linear-gradient(0deg, var(--panel), var(--X15));
		}

		> .name {
			position: absolute;
			top: 16px;
			left: 16px;
			padding: 12px 16px;
			background: rgba(0, 0, 0, 0.7);
			color: #fff;
			font-size: 1.2em;
		}

		> .status {
			position: absolute;
			z-index: 1;
			bottom: 16px;
			right: 16px;
			padding: 8px 12px;
			font-size: 80%;
			background: rgba(0, 0, 0, 0.7);
			border-radius: 6px;
			color: #fff;
		}

		> .sensitiveIndicator {
			position: absolute;
			z-index: 1;
			bottom: 16px;
			left: 16px;
			background: rgba(0, 0, 0, 0.7);
			color: var(--warn);
			border-radius: 6px;
			font-weight: bold;
			font-size: 1em;
			padding: 4px 7px;
		}
	}

	> article {
		padding: 16px;

		> p {
			margin: 0;
			font-size: 1em;
		}
	}

	> footer {
		padding: 12px 16px;
		border-top: solid 0.5px var(--divider);

		> span {
			opacity: 0.7;
			font-size: 0.9em;
		}
	}

	@media (max-width: 550px) {
		font-size: 0.9em;

		> .banner {
			height: 80px;

			> .status {
				display: none;
			}
		}

		> article {
			padding: 12px;
		}

		> footer {
			display: none;
		}
	}

	@media (max-width: 500px) {
		font-size: 0.8em;

		> .banner {
			height: 70px;
		}

		> article {
			padding: 8px;
		}
	}
}

.indicator {
	position: absolute;
	top: 0;
	right: 0;
	transform: translate(25%, -25%);
	background-color: var(--accent);
	border: solid var(--bg) 4px;
	border-radius: 100%;
	width: 1.5rem;
	height: 1.5rem;
	aspect-ratio: 1 / 1;
}

</style>