Add SPA post overlay

src/site/api/routes.js

@@ -114,6 +114,34 @@ module.exports = [
 			})
 		}
 	},
+	{
+		route: `/fragment/post/(${constants.external.shortcode_regex})`, methods: ["GET"], code: ({fill}) => {
+			return getOrFetchShortcode(fill[0]).then(async post => {
+				await post.fetchChildren()
+				await post.fetchExtendedOwnerP() // serial await is okay since intermediate fetch result is cached
+				if (post.isVideo()) await post.fetchVideoURL()
+				return {
+					statusCode: 200,
+					contentType: "application/json",
+					content: {
+						title: post.getCaptionIntroduction(),
+						html: pugCache.get("pug/fragments/post.pug").web({post})
+					}
+				}
+			}).catch(error => {
+				if (error === constants.symbols.NOT_FOUND) {
+					return render(404, "pug/friendlyerror.pug", {
+						statusCode: 404,
+						title: "Not found",
+						message: "Somehow, you reached a post that doesn't exist.",
+						withInstancesLink: false
+					})
+				} else {
+					throw error
+				}
+			})
+		}
+	},
 	{
 		route: "/p", methods: ["GET"], code: async ({url}) => {
 			if (url.searchParams.has("p")) {
@@ -135,7 +163,7 @@ module.exports = [
 		route: `/p/(${constants.external.shortcode_regex})`, methods: ["GET"], code: ({fill}) => {
 			return getOrFetchShortcode(fill[0]).then(async post => {
 				await post.fetchChildren()
-				await post.fetchExtendedOwnerP() // parallel await is okay since intermediate fetch result is cached
+				await post.fetchExtendedOwnerP() // serial await is okay since intermediate fetch result is cached
 				if (post.isVideo()) await post.fetchVideoURL()
 				return render(200, "pug/post.pug", {post})
 			}).catch(error => {

src/site/html/static/js/pagination.js

@@ -15,9 +15,29 @@ class FreezeWidth extends ElemJS {
 
 const intersectionThreshold = 0
 
+class NextPageController {
+	constructor() {
+		this.instance = null
+	}
+
+	add() {
+		const nextPage = q("#next-page")
+		if (nextPage) {
+			this.instance = new NextPage(nextPage, this)
+		} else {
+			this.instance = null
+		}
+	}
+
+	activate() {
+		if (this.instance) this.instance.activate()
+	}
+}
+
 class NextPage extends FreezeWidth {
-	constructor(container) {
+	constructor(container, controller) {
 		super(container)
+		this.controller = controller
 		this.clicked = false
 		this.nextPageNumber = +this.element.getAttribute("data-page")
 		this.attribute("href", "javascript:void(0)")
@@ -54,14 +74,17 @@ class NextPage extends FreezeWidth {
 			q("#next-page-container").remove()
 			this.observer.disconnect()
 			q("#timeline").insertAdjacentHTML("beforeend", text)
-			addNextPageControl()
+			this.controller.add()
 		})
 	}
+
+	activate() {
+		if (this.fetching) return
+		this.class("disabled")
+		this.fetch()
+	}
 }
 
-function addNextPageControl() {
+const controller = new NextPageController()
-	const nextPage = q("#next-page")
+controller.add()
-	if (nextPage) new NextPage(nextPage)
+export {controller}
-}
-
-addNextPageControl()

src/site/html/static/js/post_overlay.js

@@ -0,0 +1,125 @@
+import {q, ElemJS} from "./elemjs/elemjs.js"
+
+/** @type {PostOverlay[]} */
+const postOverlays = []
+const titleHistory = []
+titleHistory.push(document.title)
+const shortcodeDataMap = new Map()
+
+window.addEventListener("popstate", event => {
+	// console.log(event.state, postOverlays.length)
+	if (event.state) {
+		if (event.state.view === "post_overlay") {
+			loadPostOverlay(event.state.shortcode, false)
+		}
+	} else { // event.state === null which means back to originally loaded page, so pop overlay
+		setTimeout(() => { // make sure document is entirely loaded
+			if (titleHistory.length === 1) {
+				document.title = titleHistory[0]
+			} else if (titleHistory.length >= 2) {
+				titleHistory.pop()
+				document.title = titleHistory.slice(-1)[0]
+			}
+			if (postOverlays.length) {
+				popOverlay()
+			} else {
+				window.location.reload()
+			}
+		})
+	}
+})
+
+function pushOverlay(overlay) {
+	postOverlays.push(overlay)
+	document.body.style.overflowY = "hidden"
+}
+
+function popOverlay() {
+	const top = postOverlays.pop()
+	if (top) {
+		top.pop()
+	}
+	if (postOverlays.length === 0) document.body.style.overflowY = "auto"
+}
+
+class PostOverlay extends ElemJS {
+	constructor() {
+		super("div")
+		this.class("post-overlay")
+		this.event("click", event => {
+			if (event.target === event.currentTarget) history.back()
+		})
+		this.loaded = false
+		this.available = true
+		setTimeout(() => {
+			if (!this.loaded) {
+				this.class("loading")
+				this.child(
+					new ElemJS("div").class("loading-inner").text("Loading...")
+				)
+			}
+		}, 0)
+	}
+
+	setContent(html) {
+		this.html(html)
+		this.loaded = true
+		this.removeClass("loading")
+	}
+
+	showError() {
+		this.loaded = true
+		this.class("loading")
+		this.clearChildren()
+		this.child(
+			new ElemJS("div").class("loading-inner").text("Request failed.")
+		)
+	}
+
+	pop() {
+		this.element.remove()
+		this.available = false
+	}
+}
+
+const timeline = q("#timeline")
+if (timeline) {
+	timeline.addEventListener("click", event => {
+		/** @type {HTMLElement[]} */
+		//@ts-ignore
+		const path = event.composedPath()
+		const postLink = path.find(element => element.classList && element.classList.contains("sized-link") && element.hasAttribute("data-shortcode"))
+		if (postLink) {
+			event.preventDefault()
+			const shortcode = postLink.getAttribute("data-shortcode")
+			loadPostOverlay(shortcode, true)
+		}
+	})
+}
+
+function fetchShortcodeFragment(shortcode) {
+	if (shortcodeDataMap.has(shortcode)) return Promise.resolve(shortcodeDataMap.get(shortcode))
+	else return fetch(`/fragment/post/${shortcode}`).then(res => res.json())
+}
+
+function loadPostOverlay(shortcode, shouldPushState) {
+	const overlay = new PostOverlay()
+	document.body.appendChild(overlay.element)
+	pushOverlay(overlay)
+	if (shouldPushState) history.pushState({view: "post_overlay", shortcode: shortcode}, "", `/p/${shortcode}`)
+	const fetcher = fetchShortcodeFragment(shortcode)
+	fetcher.then(root => {
+		shortcodeDataMap.set(shortcode, root)
+		if (overlay.available) {
+			const {title, html} = root
+			overlay.setContent(html)
+			if (overlay.available) {
+				document.title = title
+			}
+		}
+	})
+	fetcher.catch(error => {
+		console.error(error)
+		overlay.showError()
+	})
+}

src/site/pug/fragments/post.pug

@@ -0,0 +1,5 @@
+//- Needs post
+
+include ../includes/post.pug
+
++post(post)

src/site/pug/includes/post.pug

@@ -0,0 +1,17 @@
+include ./display_structured
+
+mixin post(post)
+	.post-page-divider
+		section.description-section
+			header.user-header
+				img(src=post.ownerPfpCacheP width=150 height=150 alt="").pfp
+				a.name(href=`/u/${post.getBasicOwner().username}`)= `${post.data.owner.full_name} (@${post.getBasicOwner().username})`
+			if post.getCaption()
+				p.structured-text.description
+					+display_structured(post.getStructuredCaption())
+		section.images-gallery
+			for entry in post.children
+				if entry.isVideo()
+					video(src=entry.getVideoUrlP() controls preload="auto" width=entry.data.dimensions.width height=entry.data.dimensions.height).sized-video
+				else
+					img(src=entry.getDisplayUrlP() alt=entry.getAlt() width=entry.data.dimensions.width height=entry.data.dimensions.height).sized-image

src/site/pug/includes/timeline_page.pug

@@ -11,5 +11,5 @@ mixin timeline_page(page, pageIndex)
 			- const suggestedSize = 260 //- from css :(
 			each image in page
 				- const thumbnail = image.getSuggestedThumbnailP(suggestedSize) //- use this as the src in case there are problems with srcset
-				a(href=`/p/${image.data.shortcode}`).sized-link
+				a(href=`/p/${image.data.shortcode}` data-shortcode=image.data.shortcode).sized-link
 					img(src=thumbnail.src alt=image.getAlt() width=thumbnail.config_width height=thumbnail.config_height srcset=image.getThumbnailSrcsetP() sizes=image.getThumbnailSizes()).sized-image

src/site/pug/post.pug

@@ -1,6 +1,4 @@
-include includes/display_structured
+include includes/post
-
-- const numberFormat = new Intl.NumberFormat().format
 
 doctype html
 html
@@ -12,18 +10,7 @@ html
 				=`Post from @${post.getBasicOwner().username}`
 			=` | Bibliogram`
 		include includes/head
+		script(type="module" src="/static/js/post_overlay.js")
 	body.post-page
-		main.post-page-divider
+		main
-			section.description-section
+			+post(post)
-				header.user-header
-					img(src=post.ownerPfpCacheP width=150 height=150 alt="").pfp
-					a.name(href=`/u/${post.getBasicOwner().username}`)= `${post.data.owner.full_name} (@${post.getBasicOwner().username})`
-				if post.getCaption()
-					p.structured-text.description
-						+display_structured(post.getStructuredCaption())
-			section.images-gallery
-				for entry in post.children
-					if entry.isVideo()
-						video(src=entry.getVideoUrlP() controls preload="auto" width=entry.data.dimensions.width height=entry.data.dimensions.height).sized-video
-					else
-						img(src=entry.getDisplayUrlP() alt=entry.getAlt() width=entry.data.dimensions.width height=entry.data.dimensions.height).sized-image

src/site/pug/user.pug

@@ -16,6 +16,7 @@ html
 			title= `@${user.data.username} | Bibliogram`
 		include includes/head
 		script(src="/static/js/pagination.js" type="module")
+		script(src="/static/js/post_overlay.js" type="module")
 	body
 		.main-divider
 			header.profile-overview
@@ -46,7 +47,7 @@ html
 						if constants.settings.rss_enabled
 							+feed_link("RSS", "rss", user.data.username, "application/rss+xml", display_feed_validation_buttons)
 							+feed_link("Atom", "atom", user.data.username, "application/atom+xml", display_feed_validation_buttons)
-						a(rel="noreferrer noopener" href=`https://www.instagram.com/${user.data.username}`) instagram.com
+						a(rel="noreferrer noopener" href=`https://www.instagram.com/${user.data.username}` target="_blank") instagram.com
 
 			- const hasPosts = !user.data.is_private && user.timeline.pages.length && user.timeline.pages[0].length
 			main(class=hasPosts ? "" : "no-posts")#timeline.timeline

src/site/sass/main.sass

@@ -215,7 +215,7 @@ body
 				@include sized
 
 .post-page
-	background-color: #6a6b71
+	background-color: #505156
 
 .post-page-divider
 	display: grid
@@ -490,3 +490,31 @@ body
 		margin-top: 45px
 		padding-top: 15px
 		border-top: 1px solid #714141
+
+.post-overlay
+	position: fixed
+	top: 0
+	left: 0
+	right: 0
+	bottom: 0
+	background: rgba(0, 0, 0, 0.7)
+	z-index: 10
+	overflow-y: auto
+
+	&:not(.loading) > *
+		min-height: 100vh
+
+	&.loading
+		display: flex
+		justify-content: center
+		align-items: center
+
+	.loading-inner
+		color: white
+		font-size: 30px
+		line-height: 1
+		padding: 26px
+		border-radius: 20px
+		border: 2px solid #aaa
+		font-weight: bold
+		background-color: #282828