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import { attribute } from "../lustre/lustre/attribute.mjs";
import { element, text } from "../lustre/lustre/element.mjs";
import { List, Empty, NonEmpty } from "./gleam.mjs";
import { fromMarkdown } from "mdast-util-from-markdown";
import { highlight_element } from "./highlight.ffi.mjs";
import * as Markdown from "./app/ui/markdown.mjs";
const empty = new Empty();
const singleton = (val) => new NonEmpty(val, empty);
const fold_into_list = (arr, f) =>
arr.reduceRight((acc, val) => new NonEmpty(f(val), acc), empty);
function compute_hash(str) {
let hash = 0;
for (let i = 0, len = str.length; i < len; i++) {
let chr = str.charCodeAt(i);
hash = (hash << 5) - hash + chr;
hash |= 0; // Convert to 32bit integer
}
return `${~hash}`;
}
function linkify(el) {
for (const [t, url] of Object.entries(links)) {
el.innerHTML = el.innerHTML.replace(
new RegExp(`\\b${t}\\b`, "g"),
`<a href="${url}" class="hover:underline">${t}</a>`
);
}
}
const base = import.meta.env.BASE_URL;
const stdlib = "https://hexdocs.pm/gleam_stdlib/gleam/";
const links = {
App: `${base}api/lustre#app-type`,
Attribute: `${base}api/lustre/attribute#attribute-type`,
Bool: `${stdlib}bool.html`,
Decoder: `${stdlib}dynamic.html#Decoder`,
Dynamic: `${stdlib}dynamic.html#Dynamic`,
Effect: `${base}api/lustre/effect#effect-type`,
Element: `${base}api/lustre/element#element-type`,
Error: `${base}api/lustre#error-type`,
Float: `${stdlib}float.html`,
Int: `${stdlib}int.html`,
List: `${stdlib}list.html`,
Map: `${stdlib}map.html#Map`,
Option: `${stdlib}option.html#Option`,
Result: `${stdlib}result.html`,
String: `${stdlib}string.html`,
StringBuilder: `${stdlib}string_builder.html#StringBuilder`,
};
const cashe = new Map();
export function parse_markdown(md) {
window.requestAnimationFrame(() => {
const selector = `[data-hash]:not(.hljs)`;
for (const code of document.querySelectorAll(selector)) {
highlight_element(code, code.dataset.lang).then(() => {
linkify(code);
});
}
});
if (cashe.has(md)) return cashe.get(md);
const ast = fromMarkdown(md);
const summary = [];
const content = fold_into_list(
ast.children,
function to_lustre_element(node) {
switch (node.type) {
case "code":
return Markdown.code(node.value, compute_hash(node.value), node.lang);
case "emphasis":
return Markdown.emphasis(
fold_into_list(node.children, to_lustre_element)
);
case "heading": {
const [title, rest] = node.children[0].value.split("|");
const tags = List.fromArray(rest ? rest.trim().split(" ") : []);
const id =
/^[A-Z]/.test(title.trim()) &&
node.depth === 3 &&
window.location.pathname.includes("/api/")
? `${title
.toLowerCase()
.trim()
.replace(/\s/g, "-")
.replace(/[^a-zA-Z0-9-_]/g, "")}-type`
: `${title
.toLowerCase()
.trim()
.replace(/\s/g, "-")
.replace(/[^a-zA-Z0-9-_]/g, "")}`;
if (node.depth > 1) {
summary.unshift(
element(
"a",
List.fromArray([
attribute("href", `#${id}`),
attribute("class", "text-sm text-gray-400 no-underline"),
attribute("class", "hover:text-gray-700 hover:underline"),
attribute(
"class",
node.depth === 2 ? `mt-4 first:mt-0` : `ml-2`
),
]),
singleton(text(title.trim()))
)
);
}
return Markdown.heading(node.depth, title.trim(), tags, id);
}
case "inlineCode":
return Markdown.inline_code(node.value);
case "link":
return Markdown.link(
node.url.startsWith("/")
? import.meta.BASE_URL + node.url.slice(1)
: node.url,
fold_into_list(node.children, to_lustre_element)
);
case "list":
return Markdown.list(
!!node.ordered,
fold_into_list(node.children, to_lustre_element)
);
case "listItem":
return Markdown.list_item(
fold_into_list(node.children, to_lustre_element)
);
case "paragraph":
return Markdown.paragraph(
fold_into_list(node.children, to_lustre_element)
);
case "strong":
return Markdown.strong(
fold_into_list(node.children, to_lustre_element)
);
case "text":
return Markdown.text(node.value);
default:
return Markdown.text("");
}
}
);
cashe.set(md, [content, List.fromArray(summary)]);
return [content, List.fromArray(summary)];
}
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