48 lines
1.1 KiB
TypeScript
48 lines
1.1 KiB
TypeScript
import type { Root } from "hast"
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import { Plugin } from "unified"
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import { visit } from "unist-util-visit"
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import { IS_PROD } from "~/lib/constants"
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import { toGateway } from "~/lib/ipfs-parser"
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import { MarkdownEnv } from "."
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const isExternLink = (url: string) => /^https?:\/\//.test(url)
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export const rehypeImage: Plugin<Array<{ env: MarkdownEnv }>, Root> = ({
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env,
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}) => {
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return (tree: Root) => {
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let first = true
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visit(tree, { tagName: "img" }, (node) => {
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if (!node.properties) return
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let url = node.properties.src
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if (!url || typeof url !== "string") {
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return
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}
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const ipfsUrl = toGateway(url)
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node.properties.src = ipfsUrl
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url = ipfsUrl
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if (first) {
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env.cover = url
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first = false
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}
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env.images.push(url)
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if (isExternLink(url)) {
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if (!url.startsWith("https:") && IS_PROD) {
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console.error(`External image url must start with https: ${url}`)
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url.replace(/^http:/, "https:")
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}
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return
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}
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node.properties.src = url
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})
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}
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}
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