From 40810d76c1aea756670a43cab021975e6ffec83e Mon Sep 17 00:00:00 2001
From: DIYgod <i@diygod.me>
Date: Wed, 7 Jun 2023 22:00:15 +0100
Subject: [PATCH] feat: blur data and fixed size for post images, close #440

---
 next.config.js              |  2 +-
 package.json                |  1 +
 pnpm-lock.yaml              | 11 +++++++++++
 src/app/api/image/route.ts  | 37 +++++++++++++++++++++++++++++++++++++
 src/components/ui/Image.tsx | 13 ++++++++++++-
 src/markdown/index.ts       |  6 ------
 src/queries/page.ts         | 15 +++++++++++++++
 7 files changed, 77 insertions(+), 8 deletions(-)
 create mode 100644 src/app/api/image/route.ts

diff --git a/next.config.js b/next.config.js
index cae1fa0f..bb2ef29f 100644
--- a/next.config.js
+++ b/next.config.js
@@ -88,7 +88,7 @@ module.exports = withBundleAnalyzer(
 
       // https://github.com/kkomelin/isomorphic-dompurify/issues/54
       // Fix isomorphic-dompurify in app router
-      config.externals = [...config.externals, "canvas", "jsdom"]
+      config.externals = [...config.externals, "canvas", "jsdom", "sharp"]
 
       return config
     },
diff --git a/package.json b/package.json
index 295aba4f..27168b5b 100644
--- a/package.json
+++ b/package.json
@@ -101,6 +101,7 @@
     "pangu": "4.0.7",
     "path-to-regexp": "6.2.1",
     "pinyin-pro": "3.14.0",
+    "plaiceholder": "3.0.0",
     "prismjs": "1.29.0",
     "qier-progress": "1.0.4",
     "rc-dplayer": "0.1.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 1f5298d7..0c9260ed 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -224,6 +224,9 @@ dependencies:
   pinyin-pro:
     specifier: 3.14.0
     version: 3.14.0
+  plaiceholder:
+    specifier: 3.0.0
+    version: 3.0.0(sharp@0.32.1)
   prismjs:
     specifier: 1.29.0
     version: 1.29.0
@@ -11070,6 +11073,14 @@ packages:
       find-up: 4.1.0
     dev: true
 
+  /plaiceholder@3.0.0(sharp@0.32.1):
+    resolution: {integrity: sha512-jwHxxHPnr1BwRzPCeZgEK2BMsEy2327sWynw3qb6XC/oGgGDUTPtR8pFxFQmNArhMBwhkUbUr5OPhhIJpCa8eQ==}
+    peerDependencies:
+      sharp: '>= 0.30.6'
+    dependencies:
+      sharp: 0.32.1
+    dev: false
+
   /pngjs@5.0.0:
     resolution: {integrity: sha512-40QW5YalBNfQo5yRYmiw7Yz6TKKVr3h6970B2YE+3fQpsWcrbj1PzJgxeJ19DRQjhMbKPIuMY8rFaXc8moolVw==}
     engines: {node: '>=10.13.0'}
diff --git a/src/app/api/image/route.ts b/src/app/api/image/route.ts
new file mode 100644
index 00000000..03f50a08
--- /dev/null
+++ b/src/app/api/image/route.ts
@@ -0,0 +1,37 @@
+import { getPlaiceholder } from "plaiceholder"
+
+import { cacheGet } from "~/lib/redis.server"
+import { NextServerResponse, getQuery } from "~/lib/server-helper"
+
+const getImage = async (src: string) => {
+  return cacheGet({
+    key: ["getImage", src],
+    noUpdate: true,
+    getValueFun: async () => {
+      const buffer = await fetch(src).then(async (res) =>
+        Buffer.from(await res.arrayBuffer()),
+      )
+
+      const {
+        metadata: { height, width },
+        ...plaiceholder
+      } = await getPlaiceholder(buffer, { size: 10 })
+
+      return {
+        base64: plaiceholder.base64,
+        size: { height, width },
+      }
+    },
+  })
+}
+
+export async function GET(req: Request) {
+  let { url } = getQuery(req)
+  if (!url) {
+    return new NextServerResponse()
+      .status(400)
+      .json({ error: "url is required" })
+  }
+  const res = new NextServerResponse()
+  return res.status(200).json(await getImage(url))
+}
diff --git a/src/components/ui/Image.tsx b/src/components/ui/Image.tsx
index 2f8f822b..85d5a8cd 100644
--- a/src/components/ui/Image.tsx
+++ b/src/components/ui/Image.tsx
@@ -6,6 +6,7 @@ import React, { useEffect } from "react"
 import { useGetState } from "~/hooks/useGetState"
 import { useIsMobileLayout } from "~/hooks/useMobileLayout"
 import { toGateway, toIPFS } from "~/lib/ipfs-parser"
+import { useGetImageInfo } from "~/queries/page"
 
 type TImageProps = {
   className?: string
@@ -152,10 +153,20 @@ export const Image: React.FC<TImageProps> = ({
 }
 
 export const ZoomedImage: React.FC<TImageProps> = (props) => {
+  const info = useGetImageInfo(props.src)
+  const autoProps = info?.data
+    ? {
+        width: info.data.size?.width,
+        height: info.data.size?.height,
+        blurDataURL: info.data.base64,
+        placeholder: "blur" as const,
+      }
+    : {}
+
   return (
     <span className="text-center block">
       {/* eslint-disable-next-line jsx-a11y/alt-text */}
-      <Image {...props} zoom />
+      <Image {...props} {...autoProps} zoom />
     </span>
   )
 }
diff --git a/src/markdown/index.ts b/src/markdown/index.ts
index 0608be17..ed820db8 100644
--- a/src/markdown/index.ts
+++ b/src/markdown/index.ts
@@ -219,12 +219,6 @@ export const renderPageContent = (
           }
         },
       })
-      // .use(rehypeRewrite, {
-      //   selector: "h1",
-      //   rewrite: (node: any) => {
-      //     node.tagName = "h2"
-      //   },
-      // })
       .use(rehypePrism, {
         ignoreMissing: true,
         showLineNumbers: true,
diff --git a/src/queries/page.ts b/src/queries/page.ts
index 17b21c9e..6eb5ee62 100644
--- a/src/queries/page.ts
+++ b/src/queries/page.ts
@@ -419,3 +419,18 @@ export function useCheckMirror(characterId?: number) {
     return pageModel.checkMirror(characterId)
   })
 }
+
+export function useGetImageInfo(src?: string) {
+  return useQuery(["getImageInfo", src], async () => {
+    if (!src) {
+      return
+    }
+    return (await (await fetch(`/api/image?url=${src}`)).json()) as {
+      size: {
+        width: number
+        height: number
+      }
+      base64: string
+    }
+  })
+}