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import type { LogOptions } from '../logger.js';
import path from 'path';
import micromark from 'micromark';
import gfmSyntax from 'micromark-extension-gfm';
import matter from 'gray-matter';
import gfmHtml from 'micromark-extension-gfm/html.js';
import { CompileResult, TransformResult } from '../@types/astro';
import { parse } from '../parser/index.js';
import { createMarkdownHeadersCollector } from '../micromark-collect-headers.js';
import { encodeMarkdown } from '../micromark-encode.js';
import { defaultLogOptions } from '../logger.js';
import { optimize } from './optimize/index.js';
import { codegen } from './codegen.js';
interface CompileOptions {
logging: LogOptions;
resolve: (p: string) => string;
}
const defaultCompileOptions: CompileOptions = {
logging: defaultLogOptions,
resolve: (p: string) => p,
};
function internalImport(internalPath: string) {
return `/_astro_internal/${internalPath}`;
}
interface ConvertAstroOptions {
compileOptions: CompileOptions;
filename: string;
fileID: string;
}
async function convertAstroToJsx(template: string, opts: ConvertAstroOptions): Promise<TransformResult> {
const { filename } = opts;
// 1. Parse
const ast = parse(template, {
filename,
});
// 2. Optimize the AST
await optimize(ast, opts);
// Turn AST into JSX
return await codegen(ast, opts);
}
async function convertMdToJsx(
contents: string,
{ compileOptions, filename, fileID }: { compileOptions: CompileOptions; filename: string; fileID: string }
): Promise<TransformResult> {
const { data: frontmatterData, content } = matter(contents);
const { headers, headersExtension } = createMarkdownHeadersCollector();
const mdHtml = micromark(content, {
allowDangerousHtml: true,
extensions: [gfmSyntax()],
htmlExtensions: [gfmHtml, encodeMarkdown, headersExtension],
});
// TODO: Warn if reserved word is used in "frontmatterData"
const contentData: any = {
...frontmatterData,
headers,
source: content,
};
let imports = '';
for (let [ComponentName, specifier] of Object.entries(frontmatterData.import || {})) {
imports += `import ${ComponentName} from '${specifier}';\n`;
}
// </script> can't be anywhere inside of a JS string, otherwise the HTML parser fails.
// Break it up here so that the HTML parser won't detect it.
const stringifiedSetupContext = JSON.stringify(contentData).replace(/\<\/script\>/g, `</scrip" + "t>`);
const raw = `---
${imports}
${frontmatterData.layout ? `export const __layout = ${JSON.stringify(frontmatterData.layout)};` : ''}
export const __content = ${stringifiedSetupContext};
---
<section>${mdHtml}</section>`;
const convertOptions = { compileOptions, filename, fileID };
return convertAstroToJsx(raw, convertOptions);
}
type SupportedExtensions = '.astro' | '.md';
async function transformFromSource(
contents: string,
{ compileOptions, filename, projectRoot }: { compileOptions: CompileOptions; filename: string; projectRoot: string }
): Promise<TransformResult> {
const fileID = path.relative(projectRoot, filename);
switch (path.extname(filename) as SupportedExtensions) {
case '.astro':
return convertAstroToJsx(contents, { compileOptions, filename, fileID });
case '.md':
return convertMdToJsx(contents, { compileOptions, filename, fileID });
default:
throw new Error('Not Supported!');
}
}
export async function compileComponent(
source: string,
{ compileOptions = defaultCompileOptions, filename, projectRoot }: { compileOptions: CompileOptions; filename: string; projectRoot: string }
): Promise<CompileResult> {
const sourceJsx = await transformFromSource(source, { compileOptions, filename, projectRoot });
const isPage = path.extname(filename) === '.md' || sourceJsx.items.some((item) => item.name === 'html');
// sort <style> tags first
sourceJsx.items.sort((a, b) => (a.name === 'style' && b.name !== 'style' ? -1 : 0));
// return template
let modJsx = `
import fetch from 'node-fetch';
// <script astro></script>
${sourceJsx.imports.join('\n')}
// \`__render()\`: Render the contents of the Astro module.
import { h, Fragment } from '${internalImport('h.js')}';
async function __render(props, ...children) {
${sourceJsx.script}
return h(Fragment, null, ${sourceJsx.items.map(({ jsx }) => jsx).join(',')});
}
export default __render;
`;
if (isPage) {
modJsx += `
// \`__renderPage()\`: Render the contents of the Astro module as a page. This is a special flow,
// triggered by loading a component directly by URL.
export async function __renderPage({request, children, props}) {
const currentChild = {
setup: typeof setup === 'undefined' ? (passthrough) => passthrough : setup,
layout: typeof __layout === 'undefined' ? undefined : __layout,
content: typeof __content === 'undefined' ? undefined : __content,
__render,
};
await currentChild.setup({request});
const childBodyResult = await currentChild.__render(props, children);
// find layout, if one was given.
if (currentChild.layout) {
const layoutComponent = (await import('/_astro/layouts/' + currentChild.layout.replace(/.*layouts\\//, "").replace(/\.astro$/, '.js')));
return layoutComponent.__renderPage({
request,
props: {content: currentChild.content},
children: [childBodyResult],
});
}
return childBodyResult;
};\n`;
} else {
modJsx += `
export async function __renderPage() { throw new Error("No <html> page element found!"); }\n`;
}
return {
result: sourceJsx,
contents: modJsx,
};
}
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