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---
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),
})),
)
const currentSubpostDetails = isCurrentSubpost
? subpostsWithReadingTime.find((subpost) => subpost.id === currentPostId)
: null
---
{
activePost && subposts.length > 0 && (
<div id="mobile-subposts-container" class="w-full xl:hidden">
<details class="group">
<summary class="flex w-full cursor-pointer items-center justify-between">
<div class="mx-auto flex w-full max-w-3xl items-center px-4 py-3">
<div class="relative mr-2 size-4">
<Icon
name={
currentSubpostDetails
? 'lucide:file-text'
: isActivePost
? 'lucide:book-open-text'
: 'lucide:book-open'
}
class="size-4 flex-shrink-0"
aria-hidden="true"
/>
</div>
<div class="flex flex-grow flex-col truncate text-sm">
<span class="text-muted-foreground truncate">
{currentSubpostDetails
? currentSubpostDetails.data.title
: activePost?.data.title}
</span>
</div>
<span class="text-muted-foreground ml-2">
<Icon
name="lucide:chevron-down"
class="h-4 w-4 transition-transform duration-200 group-open:rotate-180"
/>
</span>
</div>
</summary>
<ScrollArea
client:load
className="mx-auto max-w-3xl"
data-subposts-header-scroll
>
<div class="max-h-[30vh]">
<ul class="flex list-none flex-col gap-y-1 px-4 pb-4">
{activePost && (
<li>
{isActivePost ? (
<div class="text-foreground bg-muted mobile-subposts-active-item flex items-center gap-2 rounded-md px-2 py-1.5 text-sm font-medium">
<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">
{activePost.data.title}
</span>
{activePostReadingTime && (
<span class="text-muted-foreground/80 text-xs">
{activePostReadingTime}
{activePostCombinedReadingTime &&
activePostCombinedReadingTime !==
activePostReadingTime && (
<span>
{' '}
({activePostCombinedReadingTime} total)
</span>
)}
</span>
)}
</div>
</div>
) : (
<a
href={`/blog/${activePost.id}`}
class="mobile-subposts-link hover:text-foreground text-muted-foreground hover:bg-muted/50 flex items-center gap-2 rounded-md px-2 py-1.5 text-sm transition-colors"
>
<Icon
name="lucide:book-open"
class="size-4 flex-shrink-0"
aria-hidden="true"
/>
<div class="flex flex-col">
<span class="line-clamp-2">
{activePost.data.title}
</span>
{activePostReadingTime && (
<span class="text-muted-foreground/80 hover:text-foreground/80 text-xs">
{activePostReadingTime}
{activePostCombinedReadingTime &&
activePostCombinedReadingTime !==
activePostReadingTime && (
<span>
{' '}
({activePostCombinedReadingTime} total)
</span>
)}
</span>
)}
</div>
</a>
)}
</li>
)}
{subpostsWithReadingTime.length > 0 && (
<div class="ml-4 space-y-1">
{subpostsWithReadingTime.map((subpost) =>
currentPostId === subpost.id ? (
<div class="text-foreground bg-muted mobile-subposts-active-item flex items-center gap-2 rounded-md px-2 py-1.5 text-sm font-medium">
<Icon
name="lucide:file-text"
class="size-4 flex-shrink-0"
aria-hidden="true"
/>
<div class="flex flex-col">
<span class="line-clamp-2">{subpost.data.title}</span>
<span class="text-muted-foreground/80 text-xs">
{subpost.readingTime}
</span>
</div>
</div>
) : (
<a
href={`/blog/${subpost.id}`}
class="mobile-subposts-link hover:text-foreground text-muted-foreground hover:bg-muted/50 flex items-center gap-2 rounded-md px-2 py-1.5 text-sm 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">{subpost.data.title}</span>
<span class="text-muted-foreground/80 hover:text-foreground/80 text-xs">
{subpost.readingTime}
</span>
</div>
</a>
),
)}
</div>
)}
</ul>
</div>
</ScrollArea>
</details>
</div>
)
}
<script>
class SubpostsState {
scrollArea: HTMLElement | null = null
detailsElement: HTMLDetailsElement | null = null
headerScrollArea: HTMLElement | null = null
reset() {
this.scrollArea = null
this.detailsElement = null
this.headerScrollArea = null
}
}
const state = new SubpostsState()
class SubpostsHeaderScrollMask {
static update() {
if (!state.scrollArea || !state.headerScrollArea) return
const { scrollTop, scrollHeight, clientHeight } = state.scrollArea
const threshold = 5
const isAtTop = scrollTop <= threshold
const isAtBottom = scrollTop >= scrollHeight - clientHeight - threshold
state.headerScrollArea.classList.toggle('mask-t-from-80%', !isAtTop)
state.headerScrollArea.classList.toggle('mask-b-from-80%', !isAtBottom)
}
}
class SubpostsScroll {
static toActive() {
if (!state.scrollArea) return
const activeItem = state.scrollArea.querySelector(
'.mobile-subposts-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
}
static setupInteraction() {
const container = document.getElementById('mobile-subposts-container')
if (!container) return
state.scrollArea = container.querySelector(
'[data-radix-scroll-area-viewport]',
)
state.detailsElement = container.querySelector('details')
state.headerScrollArea = container.querySelector(
'[data-subposts-header-scroll]',
)
const links = container.querySelectorAll('.mobile-subposts-link')
if (state.scrollArea) {
state.scrollArea.addEventListener(
'scroll',
SubpostsHeaderScrollMask.update,
{ passive: true },
)
}
if (state.detailsElement) {
state.detailsElement.addEventListener('toggle', () => {
if (state.detailsElement?.open) {
requestAnimationFrame(() => {
SubpostsScroll.toActive()
setTimeout(SubpostsHeaderScrollMask.update, 100)
})
}
})
}
links.forEach((link) => {
link.addEventListener('click', () => {
if (state.detailsElement) state.detailsElement.open = false
})
})
}
}
class SubpostsController {
static init() {
state.reset()
SubpostsScroll.setupInteraction()
}
static cleanup() {
if (state.scrollArea) {
state.scrollArea.removeEventListener(
'scroll',
SubpostsHeaderScrollMask.update,
)
}
state.reset()
}
}
document.addEventListener('astro:page-load', () => SubpostsController.init())
document.addEventListener('astro:after-swap', () => {
SubpostsController.cleanup()
SubpostsController.init()
})
document.addEventListener('astro:before-swap', () =>
SubpostsController.cleanup(),
)
</script>
|
