v2: prepare to move

v2/lib/load/utils.js

@@ -0,0 +1,81 @@
+const path = require('path');
+const fm = require('front-matter');
+const escapeStringRegexp = require('escape-string-regexp');
+const fs = require('fs-extra');
+
+const genPath = path.resolve(__dirname, '../core/generated');
+fs.ensureDirSync(genPath);
+
+const genCache = new Map();
+async function generate(file, content) {
+  const cached = genCache.get(file);
+  if (cached !== content) {
+    await fs.writeFile(path.join(genPath, file), content);
+    genCache.set(file, content);
+  }
+}
+
+const indexRE = /(^|.*\/)index\.(md|js)$/i;
+const extRE = /\.(md|js)$/;
+
+function fileToPath(file) {
+  if (indexRE.test(file)) {
+    return file.replace(indexRE, '/$1');
+  }
+  return `/${file.replace(extRE, '').replace(/\\/g, '/')}`;
+}
+
+function encodePath(userpath) {
+  return userpath
+    .split('/')
+    .map(item => encodeURIComponent(item))
+    .join('/');
+}
+
+function fileToComponentName(file) {
+  const ext = extRE.exec(file)[1];
+  let str = file.replace(extRE, '');
+  str = str.replace(/([A-Z])/g, ' $1');
+  str = str.replace(/^[\W_]+|[\W_]+$/g, '').toLowerCase();
+  str = str.charAt(0).toUpperCase() + str.slice(1);
+  str = str.replace(/[\W_]+(\w|$)/g, (_, ch) => ch.toUpperCase());
+  return ext ? ext.toUpperCase() + str : str;
+}
+
+function idx(target, keyPaths) {
+  return (
+    target &&
+    (Array.isArray(keyPaths)
+      ? keyPaths.reduce((obj, key) => obj && obj[key], target)
+      : target[keyPaths])
+  );
+}
+
+function getSubFolder(file, refDir) {
+  const separator = escapeStringRegexp(path.sep);
+  const baseDir = escapeStringRegexp(path.basename(refDir));
+  const regexSubFolder = new RegExp(
+    `${baseDir}${separator}(.*?)${separator}.*`
+  );
+  const match = regexSubFolder.exec(file);
+  return match && match[1];
+}
+
+function parse(fileString) {
+  if (!fm.test(fileString)) {
+    return {metadata: null, content: fileString};
+  }
+  const {attributes: metadata, body: content} = fm(fileString);
+
+  return {metadata, content};
+}
+
+module.exports = {
+  encodePath,
+  generate,
+  fileToPath,
+  fileToComponentName,
+  getSubFolder,
+  idx,
+  parse
+};