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---
import Link from '@/components/Link.astro'
import { ScrollArea } from '@/components/ui/scroll-area'
import {
getCombinedReadingTime,
getParentId,
getParentPost,
getPostById,
getPostReadingTime,
getSubpostsForParent,
isSubpost,
} from '@/lib/data-utils'
import { Icon } from 'astro-icon/components'
const { parentId } = Astro.props
const currentPostId = Astro.params.id as string
const isCurrentSubpost = isSubpost(currentPostId)
const rootParentId = isCurrentSubpost ? getParentId(currentPostId) : parentId
const currentPost = !isCurrentSubpost ? await getPostById(currentPostId) : null
const subposts = await getSubpostsForParent(rootParentId)
const parentPost = isCurrentSubpost ? await getParentPost(currentPostId) : null
const activePost = parentPost || currentPost
const isActivePost = activePost?.id === currentPostId
const activePostReadingTime = activePost
? await getPostReadingTime(activePost.id)
: null
const activePostCombinedReadingTime =
activePost && subposts.length > 0
? await getCombinedReadingTime(activePost.id)
: null
const subpostsWithReadingTime = await Promise.all(
subposts.map(async (subpost) => ({
...subpost,
readingTime: await getPostReadingTime(subpost.id),
})),
)
---
<div
id="subposts-sidebar-container"
class="sticky top-20 col-start-3 row-span-1 mr-auto ml-8 hidden h-[calc(100vh-5rem)] max-w-md xl:block"
>
<ScrollArea
client:load
className="flex max-h-[calc(100vh-8rem)] flex-col overflow-y-auto"
data-subposts-sidebar-scroll
>
<div class="px-4">
<ul class="space-y-1">
{
activePost && (
<li>
{isActivePost ? (
<div class="text-foreground bg-muted subposts-sidebar-active-item flex items-center gap-2 rounded-md py-1.5 pr-3 pl-2 text-sm font-medium text-pretty">
<Icon
name="lucide:book-open-text"
class="size-4 flex-shrink-0"
aria-hidden="true"
/>
<div class="flex flex-col">
<span class="line-clamp-2 text-pretty">
{activePost.data.title}
</span>
{activePostReadingTime && (
<span class="text-muted-foreground/80 text-xs">
{activePostReadingTime}
{activePostCombinedReadingTime &&
activePostCombinedReadingTime !==
activePostReadingTime && (
<span>
{' '}
({activePostCombinedReadingTime} total)
</span>
)}
</span>
)}
</div>
</div>
) : (
<Link
href={`/blog/${activePost.id}#post-title`}
class="hover:text-foreground text-muted-foreground hover:bg-muted/50 subposts-sidebar-link flex items-center gap-2 rounded-md px-2 py-1.5 text-sm text-pretty transition-colors"
>
<Icon
name="lucide:book-open"
class="size-4 flex-shrink-0"
aria-hidden="true"
/>
<div class="flex flex-col">
<span class="line-clamp-2 text-pretty">
{activePost.data.title}
</span>
{activePostReadingTime && (
<span class="text-muted-foreground/80 text-xs">
{activePostReadingTime}
{activePostCombinedReadingTime &&
activePostCombinedReadingTime !==
activePostReadingTime && (
<span>
{' '}
({activePostCombinedReadingTime} total)
</span>
)}
</span>
)}
</div>
</Link>
)}
</li>
)
}
{
subpostsWithReadingTime.length > 0 && (
<li class="ml-4 space-y-1">
{subpostsWithReadingTime.map((subpost) =>
currentPostId === subpost.id ? (
<div class="text-foreground bg-muted subposts-sidebar-active-item flex items-center gap-2 rounded-md px-2 py-1.5 text-sm font-medium text-pretty">
<Icon
name="lucide:file-text"
class="size-4 flex-shrink-0"
aria-hidden="true"
/>
<div class="flex flex-col">
<span class="line-clamp-2 text-pretty">
{subpost.data.title}
</span>
<span class="text-muted-foreground/80 text-xs">
{subpost.readingTime}
</span>
</div>
</div>
) : (
<Link
href={`/blog/${subpost.id}`}
class="hover:text-foreground text-muted-foreground hover:bg-muted/50 subposts-sidebar-link flex items-center gap-2 rounded-md px-2 py-1.5 text-sm text-pretty transition-colors"
>
<Icon
name="lucide:file"
class="size-4 flex-shrink-0"
aria-hidden="true"
/>
<div class="flex flex-col">
<span class="line-clamp-2 text-pretty">
{subpost.data.title}
</span>
<span class="text-muted-foreground/80 text-xs">
{subpost.readingTime}
</span>
</div>
</Link>
),
)}
</li>
)
}
</ul>
</div>
</ScrollArea>
</div>
<script>
class SidebarState {
scrollArea: HTMLElement | null = null
sidebarScrollArea: HTMLElement | null = null
reset() {
this.scrollArea = null
this.sidebarScrollArea = null
}
}
const state = new SidebarState()
class SidebarScrollMask {
static update() {
if (!state.scrollArea || !state.sidebarScrollArea) return
const { scrollTop, scrollHeight, clientHeight } = state.scrollArea
const threshold = 5
const isAtTop = scrollTop <= threshold
const isAtBottom = scrollTop >= scrollHeight - clientHeight - threshold
state.sidebarScrollArea.classList.toggle('mask-t-from-90%', !isAtTop)
state.sidebarScrollArea.classList.toggle('mask-b-from-90%', !isAtBottom)
}
}
class SidebarScroll {
static toActive() {
if (!state.scrollArea) return
const activeItem = state.scrollArea.querySelector(
'.subposts-sidebar-active-item',
)
if (!activeItem) {
return
}
const { top: areaTop, height: areaHeight } =
state.scrollArea.getBoundingClientRect()
const { top: itemTop, height: itemHeight } =
activeItem.getBoundingClientRect()
const currentItemTop = itemTop - areaTop + state.scrollArea.scrollTop
const targetScroll = Math.max(
0,
Math.min(
currentItemTop - (areaHeight - itemHeight) / 2,
state.scrollArea.scrollHeight - state.scrollArea.clientHeight,
),
)
state.scrollArea.scrollTop = targetScroll
}
}
class SidebarController {
static init() {
state.reset()
const sidebarContainer = document.getElementById(
'subposts-sidebar-container',
)
if (sidebarContainer) {
state.scrollArea = sidebarContainer.querySelector(
'[data-radix-scroll-area-viewport]',
)
state.sidebarScrollArea = sidebarContainer.querySelector(
'[data-subposts-sidebar-scroll]',
)
if (state.scrollArea) {
state.scrollArea.addEventListener(
'scroll',
SidebarScrollMask.update,
{ passive: true },
)
}
requestAnimationFrame(() => {
SidebarScroll.toActive()
setTimeout(SidebarScrollMask.update, 100)
})
}
}
static cleanup() {
if (state.scrollArea) {
state.scrollArea.removeEventListener('scroll', SidebarScrollMask.update)
}
state.reset()
}
}
document.addEventListener('astro:page-load', () => SidebarController.init())
document.addEventListener('astro:after-swap', () => {
SidebarController.cleanup()
SidebarController.init()
})
document.addEventListener('astro:before-swap', () =>
SidebarController.cleanup(),
)
</script>
|
