80 lines
1.5 KiB
TypeScript
80 lines
1.5 KiB
TypeScript
// @ts-nocheck
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// TODO: Fix this when we turn strict mode on.
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import { toc } from "mdast-util-toc"
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import { remark } from "remark"
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import { visit } from "unist-util-visit"
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const textTypes = ["text", "emphasis", "strong", "inlineCode"]
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function flattenNode(node) {
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const p = []
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visit(node, (node) => {
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if (!textTypes.includes(node.type)) return
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p.push(node.value)
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})
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return p.join(``)
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}
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interface Item {
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title: string
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url: string
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items?: Item[]
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}
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interface Items {
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items?: Item[]
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}
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function getItems(node, current): Items {
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if (!node) {
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return {}
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}
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if (node.type === "paragraph") {
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visit(node, (item) => {
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if (item.type === "link") {
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current.url = item.url
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current.title = flattenNode(node)
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}
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if (item.type === "text") {
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current.title = flattenNode(node)
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}
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})
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return current
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}
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if (node.type === "list") {
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current.items = node.children.map((i) => getItems(i, {}))
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return current
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} else if (node.type === "listItem") {
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const heading = getItems(node.children[0], {})
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if (node.children.length > 1) {
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getItems(node.children[1], heading)
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}
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return heading
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}
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return {}
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}
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const getToc = () => (node, file) => {
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const table = toc(node)
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file.data = getItems(table.map, {})
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}
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export type TableOfContents = Items
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export async function getTableOfContents(
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content: string
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): Promise<TableOfContents> {
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const result = await remark().use(getToc).process(content)
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return result.data
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}
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