From bd53c892962908fa28ff39835240515e52b62f61 Mon Sep 17 00:00:00 2001
From: Youwen Wu <youwenw@gmail.com>
Date: Fri, 5 Apr 2024 04:27:46 -0700
Subject: [PATCH] feat: add metadata display to blog posts

---
 package.json                                |  1 +
 pnpm-lock.yaml                              |  7 ++++
 src/lib/components/Blog/PostCard.svelte     | 12 +++++-
 src/lib/components/Blog/PostMetadata.svelte | 43 +++++++++++++++++++++
 4 files changed, 61 insertions(+), 2 deletions(-)

diff --git a/package.json b/package.json
index 0290826..fbc3bda 100644
--- a/package.json
+++ b/package.json
@@ -50,6 +50,7 @@
     "@sveltejs/adapter-vercel": "^5.2.0",
     "bits-ui": "^0.21.2",
     "clsx": "^2.1.0",
+    "dayjs": "^1.11.10",
     "marked": "^12.0.1",
     "marked-alert": "^2.0.1",
     "marked-katex-extension": "^5.0.1",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index db1063a..fbb1580 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -26,6 +26,9 @@ dependencies:
   clsx:
     specifier: ^2.1.0
     version: 2.1.0
+  dayjs:
+    specifier: ^1.11.10
+    version: 1.11.10
   marked:
     specifier: ^12.0.1
     version: 12.0.1
@@ -1453,6 +1456,10 @@ packages:
     engines: {node: '>=4'}
     hasBin: true
 
+  /dayjs@1.11.10:
+    resolution: {integrity: sha512-vjAczensTgRcqDERK0SR2XMwsF/tSvnvlv6VcF2GIhg6Sx4yOIt/irsr1RDJsKiIyBzJDpCoXiWWq28MqH2cnQ==}
+    dev: false
+
   /debug@4.3.4:
     resolution: {integrity: sha512-PRWFHuSU3eDtQJPvnNY7Jcket1j0t5OuOsFzPPzsekD52Zl8qUfFIPEiswXqIvHWGVHOgX+7G/vCNNhehwxfkQ==}
     engines: {node: '>=6.0'}
diff --git a/src/lib/components/Blog/PostCard.svelte b/src/lib/components/Blog/PostCard.svelte
index be24dd7..ddb001f 100644
--- a/src/lib/components/Blog/PostCard.svelte
+++ b/src/lib/components/Blog/PostCard.svelte
@@ -2,6 +2,8 @@
 	import * as Card from '$lib/components/ui/card';
 	import Placeholder from '$lib/assets/img/galaxy.jpg';
 	import Button from '../ui/button/button.svelte';
+	import PostMetadata from './PostMetadata.svelte';
+	import { faker } from '@faker-js/faker';
 
 	export let title: string;
 	export let blurb: string;
@@ -10,8 +12,14 @@
 
 <Card.Root>
 	<Card.Header>
-		<h3 class="text-4xl font-serif font-bold mb-4">{title}</h3>
+		<h3 class="text-4xl font-serif font-bold mb-4 leading-tight">{title}</h3>
 		<p class="text-muted-foreground text-xl">{blurb}</p>
+		<PostMetadata
+			primaryTags={Array.from({ length: 3 }, () => faker.hacker.noun())}
+			secondaryTags={Array.from({ length: 2 }, () => faker.hacker.noun())}
+			time={Date.now() / 1000}
+			length={faker.number.int(1000)}
+		/>
 	</Card.Header>
 	<Card.Content class="grid grid-cols-3 gap-6">
 		<img
@@ -20,7 +28,7 @@
 			class="col-span-3 md:col-span-1 rounded-2xl shadow-md"
 		/>
 		<div class="flex flex-col justify-around col-span-3 md:col-span-2 gap-4">
-			<p class="text-primary/95 font-serif">{description}</p>
+			<p class="text-primary/95 font-serif leading-relaxed">{description}</p>
 			<Button variant="outline" href="/blog/2024/test-post" class="text-xl flex-grow sm:flex-grow-0"
 				>Read More</Button
 			>
diff --git a/src/lib/components/Blog/PostMetadata.svelte b/src/lib/components/Blog/PostMetadata.svelte
index e69de29..f130621 100644
--- a/src/lib/components/Blog/PostMetadata.svelte
+++ b/src/lib/components/Blog/PostMetadata.svelte
@@ -0,0 +1,43 @@
+<!-- 
+  @component
+  
+  This component is used to display the metadata of a blog post. It displays the primary and secondary tags, the time the post was published, and the estimated time it takes to read the post.
+
+  @props
+
+  - `primaryTags` - An array of strings representing the primary tags of the post.
+  - `secondaryTags` - An array of strings representing the secondary tags of the post.
+  - `time` - A unix epoch integer representing the time the post was published.
+  - `length` - An integer representing amount of words in the post.
+ -->
+
+<script lang="ts">
+	import Badge from '../ui/badge/badge.svelte';
+	import dayjs from 'dayjs';
+	import relativeTime from 'dayjs/plugin/relativeTime';
+
+	dayjs.extend(relativeTime);
+
+	export let primaryTags: string[] = [];
+	export let secondaryTags: string[] = [];
+	export let time: number;
+	export let length: number;
+
+	let date = dayjs(time * 1000);
+</script>
+
+<div class="grid grid-cols-1">
+	<p class="text-muted-foreground/80 my-1 text-lg">{date.format('MM/DD/YY')}</p>
+	<span class="flex items-center flex-wrap my-2 gap-2">
+		{#each primaryTags as tag}
+			<Badge>{tag}</Badge>
+		{/each}
+		{#each secondaryTags as tag}
+			<Badge variant="secondary">{tag}</Badge>
+		{/each}
+	</span>
+	<!-- Assuming adult silent reading rate of 238 wpm -->
+	<span class="text-muted-foreground text-sm mt-2">
+		{dayjs(date).fromNow()} | {Math.round(length / 238)} min read | {length} words
+	</span>
+</div>