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/*!
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.dev/license
*/
import {dirname, join} from 'path';
import {readFile, writeFile} from 'fs/promises';
import {
ASSETS_EXAMPLE_PATH,
CSS_TS_COPYRIGHT,
EXAMPLES_PATH,
HTML_COPYRIGHT,
STACKBLITZ_TEMPLATE_PATH,
STACKBLITZ_CONFIG_FILENAME,
TEMPORARY_EXAMPLES_PATH,
EXCLUDE_FILES_FOR_STACKBLITZ,
} from './utils/examples-constants.mjs';
import {copyFolder, createFolder, removeFolder} from './utils/fs.mjs';
import jsdom from 'jsdom';
import {glob} from 'glob';
import {regionParser} from './../../prerender/markdown-pipeline/regions/region-parser.mjs';
interface StackblitzConfig {
ignore: string[];
file: string;
tags: string[];
description: string;
}
export async function generateStackblitzExample(
exampleFolderName: string,
primaryFilePath: string,
title: string,
) {
const exampleDir = join(EXAMPLES_PATH, exampleFolderName);
const temporaryExampleDir = join(TEMPORARY_EXAMPLES_PATH, exampleFolderName);
const config = await readFile(join(exampleDir, STACKBLITZ_CONFIG_FILENAME), 'utf-8');
const stackblitzConfig: StackblitzConfig = JSON.parse(config);
primaryFilePath = join(...primaryFilePath.split('/'));
await createFolder(temporaryExampleDir);
await combineTemplateWithExample(exampleDir, temporaryExampleDir);
await generateStackblitzHtml(
temporaryExampleDir,
stackblitzConfig,
exampleFolderName,
primaryFilePath,
title,
);
await removeFolder(temporaryExampleDir);
}
async function combineTemplateWithExample(
exampleDir: string,
temporaryExampleDir: string,
): Promise<void> {
// Copy template files to TEMP folder
await copyFolder(STACKBLITZ_TEMPLATE_PATH, temporaryExampleDir);
// Copy example files to TEMP folder
await copyFolder(exampleDir, temporaryExampleDir);
}
async function generateStackblitzHtml(
temporaryExampleDir: string,
stackBlitzConfig: StackblitzConfig,
exampleFolderName: string,
primaryFilePath: string,
title: string,
): Promise<void> {
const defaultIncludes = [
'**/*.ts',
'**/*.js',
'**/*.css',
'**/*.html',
'**/*.md',
'**/*.json',
'**/*.svg',
];
const exampleFilePaths = await glob(defaultIncludes, {
cwd: temporaryExampleDir,
nodir: true,
dot: true,
ignore: stackBlitzConfig.ignore,
});
const postData = await createPostData(
temporaryExampleDir,
stackBlitzConfig,
exampleFilePaths,
title,
);
const primaryFile = getPrimaryFile(primaryFilePath ?? stackBlitzConfig.file, exampleFilePaths);
const html = createStackblitzHtml(postData, primaryFile);
const stackblitzHtmlPath = join(
join(ASSETS_EXAMPLE_PATH, exampleFolderName),
`${primaryFile}.html`,
);
await createFolder(dirname(stackblitzHtmlPath));
await writeFile(stackblitzHtmlPath, html, 'utf-8');
}
function getPrimaryFile(primaryFilePath: string, exampleFilePaths: string[]): string {
if (primaryFilePath) {
if (!exampleFilePaths.some((filePath) => filePath === primaryFilePath)) {
throw new Error(`The specified primary file (${primaryFilePath}) does not exist!`);
}
return primaryFilePath;
} else {
const defaultPrimaryFilePaths = [
'src/app/app.component.html',
'src/app/app.component.ts',
'src/app/main.ts',
];
const primaryFile = defaultPrimaryFilePaths.find((path) =>
exampleFilePaths.some((filePath) => filePath === path),
);
if (!primaryFile) {
throw new Error(
`None of the default primary files (${defaultPrimaryFilePaths.join(', ')}) exists.`,
);
}
return primaryFile;
}
}
async function createPostData(
exampleDir: string,
config: StackblitzConfig,
exampleFilePaths: string[],
title: string,
): Promise<Record<string, string>> {
const postData: Record<string, string> = {};
for (const filePath of exampleFilePaths) {
if (EXCLUDE_FILES_FOR_STACKBLITZ.some((excludedFile) => filePath.endsWith(excludedFile))) {
continue;
}
let content = await readFile(join(exampleDir, filePath), 'utf-8');
content = appendCopyright(filePath, content);
content = extractRegions(filePath, content);
postData[`project[files][${filePath}]`] = content;
}
const tags = ['angular', 'example', ...(config.tags || [])];
tags.forEach((tag, index) => (postData[`project[tags][${index}]`] = tag));
postData['project[description]'] = `Angular Example - ${config.description}`;
postData['project[template]'] = 'node';
postData['project[title]'] = title ?? 'Angular Example';
return postData;
}
function createStackblitzHtml(postData: Record<string, string>, primaryFile: string): string {
const baseHtml = createBaseStackblitzHtml(primaryFile);
const doc = new jsdom.JSDOM(baseHtml).window.document;
const form = doc.querySelector('form');
for (const [key, value] of Object.entries(postData)) {
const element = htmlToElement(doc, `<input type="hidden" name="${key}">`);
if (element && form) {
element.setAttribute('value', value as string);
form.appendChild(element);
}
}
return doc.documentElement.outerHTML;
}
function createBaseStackblitzHtml(primaryFile: string) {
const file = `?file=${primaryFile}`;
const action = `https://stackblitz.com/run${file}`;
return `
<!DOCTYPE html><html lang="en"><body>
<form id="mainForm" method="post" action="${action}" target="_self"></form>
<script>
var embedded = 'ctl=1';
var isEmbedded = window.location.search.indexOf(embedded) > -1;
if (isEmbedded) {
var form = document.getElementById('mainForm');
var action = form.action;
var actionHasParams = action.indexOf('?') > -1;
var symbol = actionHasParams ? '&' : '?'
form.action = form.action + symbol + embedded;
}
document.getElementById("mainForm").submit();
</script>
</body></html>
`.trim();
}
function appendCopyright(filename: string, content: string): string {
if (filename.endsWith('.html')) {
return `${HTML_COPYRIGHT}${content}`;
} else if (filename.endsWith('.ts') || filename.endsWith('.css')) {
return `${CSS_TS_COPYRIGHT}${content}`;
}
return content;
}
function htmlToElement(document: Document, html: string) {
const div = document.createElement('div');
div.innerHTML = html;
return div.firstElementChild;
}
function extractRegions(path: string, contents: string): string {
const regionParserResult = regionParser(contents, path);
return regionParserResult.contents;
}