229 lines
8.2 KiB
TypeScript
229 lines
8.2 KiB
TypeScript
import { i18n } from "../i18n"
|
|
import { FullSlug, joinSegments, pathToRoot } from "../util/path"
|
|
import { CSSResourceToStyleElement, JSResourceToScriptElement } from "../util/resources"
|
|
import { googleFontHref } from "../util/theme"
|
|
import { QuartzComponent, QuartzComponentConstructor, QuartzComponentProps } from "./types"
|
|
import satori, { SatoriOptions } from "satori"
|
|
import { loadEmoji, getIconCode } from "../util/emoji"
|
|
import fs from "fs"
|
|
import sharp from "sharp"
|
|
import { ImageOptions, SocialImageOptions, getSatoriFont, defaultImage } from "../util/og"
|
|
import { unescapeHTML } from "../util/escape"
|
|
|
|
/**
|
|
* Generates social image (OG/twitter standard) and saves it as `.webp` inside the public folder
|
|
* @param opts options for generating image
|
|
*/
|
|
async function generateSocialImage(
|
|
{ cfg, description, fileName, fontsPromise, title, fileData }: ImageOptions,
|
|
userOpts: SocialImageOptions,
|
|
imageDir: string,
|
|
) {
|
|
const fonts = await fontsPromise
|
|
const { width, height } = userOpts
|
|
|
|
// JSX that will be used to generate satori svg
|
|
const imageComponent = userOpts.imageStructure(cfg, userOpts, title, description, fonts, fileData)
|
|
|
|
const svg = await satori(imageComponent, {
|
|
width,
|
|
height,
|
|
fonts,
|
|
loadAdditionalAsset: async (languageCode: string, segment: string) => {
|
|
if (languageCode === "emoji") {
|
|
return `data:image/svg+xml;base64,${btoa(await loadEmoji(getIconCode(segment)))}`
|
|
}
|
|
|
|
return languageCode
|
|
},
|
|
})
|
|
|
|
// Convert svg directly to webp (with additional compression)
|
|
const compressed = await sharp(Buffer.from(svg)).webp({ quality: 40 }).toBuffer()
|
|
|
|
// Write to file system
|
|
const filePath = joinSegments(imageDir, `${fileName}.${extension}`)
|
|
fs.writeFileSync(filePath, compressed)
|
|
}
|
|
|
|
const extension = "webp"
|
|
|
|
const defaultOptions: SocialImageOptions = {
|
|
colorScheme: "lightMode",
|
|
width: 1200,
|
|
height: 630,
|
|
imageStructure: defaultImage,
|
|
excludeRoot: false,
|
|
}
|
|
|
|
export default (() => {
|
|
let fontsPromise: Promise<SatoriOptions["fonts"]>
|
|
|
|
let fullOptions: SocialImageOptions
|
|
const Head: QuartzComponent = ({
|
|
cfg,
|
|
fileData,
|
|
externalResources,
|
|
ctx,
|
|
}: QuartzComponentProps) => {
|
|
// Initialize options if not set
|
|
if (!fullOptions) {
|
|
if (typeof cfg.generateSocialImages !== "boolean") {
|
|
fullOptions = { ...defaultOptions, ...cfg.generateSocialImages }
|
|
} else {
|
|
fullOptions = defaultOptions
|
|
}
|
|
}
|
|
|
|
// Memoize google fonts
|
|
if (!fontsPromise && cfg.generateSocialImages) {
|
|
fontsPromise = getSatoriFont(cfg.theme.typography.header, cfg.theme.typography.body)
|
|
}
|
|
|
|
const slug = fileData.filePath
|
|
// since "/" is not a valid character in file names, replace with "-"
|
|
const fileName = slug?.replaceAll("/", "-")
|
|
|
|
// Get file description (priority: frontmatter > fileData > default)
|
|
const fdDescription =
|
|
fileData.description?.trim() ?? i18n(cfg.locale).propertyDefaults.description
|
|
const titleSuffix = cfg.pageTitleSuffix ?? ""
|
|
const title =
|
|
(fileData.frontmatter?.title ?? i18n(cfg.locale).propertyDefaults.title) + titleSuffix
|
|
let description = ""
|
|
if (fdDescription) {
|
|
description = unescapeHTML(fdDescription)
|
|
}
|
|
|
|
if (fileData.frontmatter?.socialDescription) {
|
|
description = fileData.frontmatter?.socialDescription as string
|
|
} else if (fileData.frontmatter?.description) {
|
|
description = fileData.frontmatter?.description
|
|
}
|
|
|
|
const fileDir = joinSegments(ctx.argv.output, "static", "social-images")
|
|
if (cfg.generateSocialImages) {
|
|
// Generate folders for social images (if they dont exist yet)
|
|
if (!fs.existsSync(fileDir)) {
|
|
fs.mkdirSync(fileDir, { recursive: true })
|
|
}
|
|
|
|
if (fileName) {
|
|
// Generate social image (happens async)
|
|
void generateSocialImage(
|
|
{
|
|
title,
|
|
description,
|
|
fileName,
|
|
fileDir,
|
|
fileExt: extension,
|
|
fontsPromise,
|
|
cfg,
|
|
fileData,
|
|
},
|
|
fullOptions,
|
|
fileDir,
|
|
)
|
|
}
|
|
}
|
|
|
|
const { css, js, additionalHead } = externalResources
|
|
|
|
const url = new URL(`https://${cfg.baseUrl ?? "example.com"}`)
|
|
const path = url.pathname as FullSlug
|
|
const baseDir = fileData.slug === "404" ? path : pathToRoot(fileData.slug!)
|
|
|
|
const iconPath = joinSegments(baseDir, "static/icon.png")
|
|
|
|
const ogImageDefaultPath = `https://${cfg.baseUrl}/static/og-image.png`
|
|
// "static/social-images/slug-filename.md.webp"
|
|
const ogImageGeneratedPath = `https://${cfg.baseUrl}/${fileDir.replace(
|
|
`${ctx.argv.output}/`,
|
|
"",
|
|
)}/${fileName}.${extension}`
|
|
|
|
// Use default og image if filePath doesnt exist (for autogenerated paths with no .md file)
|
|
const useDefaultOgImage = fileName === undefined || !cfg.generateSocialImages
|
|
|
|
// Path to og/social image (priority: frontmatter > generated image (if enabled) > default image)
|
|
let ogImagePath = useDefaultOgImage ? ogImageDefaultPath : ogImageGeneratedPath
|
|
|
|
// TODO: could be improved to support external images in the future
|
|
// Aliases for image and cover handled in `frontmatter.ts`
|
|
const frontmatterImgUrl = fileData.frontmatter?.socialImage
|
|
|
|
// Override with default og image if config option is set
|
|
if (fileData.slug === "index") {
|
|
ogImagePath = ogImageDefaultPath
|
|
}
|
|
|
|
// Override with frontmatter url if existing
|
|
if (frontmatterImgUrl) {
|
|
ogImagePath = `https://${cfg.baseUrl}/static/${frontmatterImgUrl}`
|
|
}
|
|
|
|
// Url of current page
|
|
const socialUrl =
|
|
fileData.slug === "404" ? url.toString() : joinSegments(url.toString(), fileData.slug!)
|
|
|
|
return (
|
|
<head>
|
|
<title>{title}</title>
|
|
<meta charSet="utf-8" />
|
|
{cfg.theme.cdnCaching && cfg.theme.fontOrigin === "googleFonts" && (
|
|
<>
|
|
<link rel="preconnect" href="https://fonts.googleapis.com" />
|
|
<link rel="preconnect" href="https://fonts.gstatic.com" />
|
|
<link rel="stylesheet" href={googleFontHref(cfg.theme)} />
|
|
</>
|
|
)}
|
|
<link rel="preconnect" href="https://cdnjs.cloudflare.com" crossOrigin="anonymous" />
|
|
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
|
|
{/* OG/Twitter meta tags */}
|
|
<meta name="og:site_name" content={cfg.pageTitle}></meta>
|
|
<meta property="og:title" content={title} />
|
|
<meta property="og:type" content="website" />
|
|
<meta name="twitter:card" content="summary_large_image" />
|
|
<meta name="twitter:title" content={title} />
|
|
<meta name="twitter:description" content={description} />
|
|
<meta property="og:description" content={description} />
|
|
<meta property="og:image:type" content={`image/${extension}`} />
|
|
<meta property="og:image:alt" content={description} />
|
|
{/* Dont set width and height if unknown (when using custom frontmatter image) */}
|
|
{!frontmatterImgUrl && (
|
|
<>
|
|
<meta property="og:image:width" content={fullOptions.width.toString()} />
|
|
<meta property="og:image:height" content={fullOptions.height.toString()} />
|
|
</>
|
|
)}
|
|
<meta property="og:image:url" content={ogImagePath} />
|
|
{cfg.baseUrl && (
|
|
<>
|
|
<meta name="twitter:image" content={ogImagePath} />
|
|
<meta property="og:image" content={ogImagePath} />
|
|
<meta property="twitter:domain" content={cfg.baseUrl}></meta>
|
|
<meta property="og:url" content={socialUrl}></meta>
|
|
<meta property="twitter:url" content={socialUrl}></meta>
|
|
</>
|
|
)}
|
|
<link rel="icon" href={iconPath} />
|
|
<meta name="description" content={description} />
|
|
<meta name="generator" content="Quartz" />
|
|
{css.map((resource) => CSSResourceToStyleElement(resource, true))}
|
|
{js
|
|
.filter((resource) => resource.loadTime === "beforeDOMReady")
|
|
.map((res) => JSResourceToScriptElement(res, true))}
|
|
{additionalHead.map((resource) => {
|
|
if (typeof resource === "function") {
|
|
return resource(fileData)
|
|
} else {
|
|
return resource
|
|
}
|
|
})}
|
|
</head>
|
|
)
|
|
}
|
|
|
|
return Head
|
|
}) satisfies QuartzComponentConstructor
|