chore: remove old parser

tools/challenge-parser/parser/plugins/utils/get-file-visitor.js

@@ -0,0 +1,84 @@
+const is = require('unist-util-is');
+const position = require('unist-util-position');
+const { isEmpty } = require('lodash');
+
+const getId = require('./get-id');
+
+const keyToSection = {
+  head: 'before-user-code',
+  tail: 'after-user-code'
+};
+const supportedLanguages = ['js', 'css', 'html', 'jsx', 'py'];
+
+function defaultFile(lang, id) {
+  return {
+    key: `index${lang}`,
+    ext: lang,
+    name: 'index',
+    contents: '',
+    head: '',
+    tail: '',
+    id
+  };
+}
+
+function getFileVisitor(seeds, seedKey, validate) {
+  return (node, index, parent) => {
+    if (is(node, 'root')) return;
+    if (is(node, 'code')) {
+      codeToData(node, seeds, seedKey, validate);
+      return;
+    }
+    idToData(node, index, parent, seeds);
+  };
+}
+
+function codeToData(node, seeds, seedKey, validate) {
+  if (validate) validate(node);
+  const lang = node.lang;
+  if (!supportedLanguages.includes(lang))
+    throw Error(`On line ${
+      position.start(node).line
+    } '${lang}' is not a supported language.
+ Please use one of js, css, html, jsx or py
+`);
+
+  const key = `index${lang}`;
+  const id = seeds[key] ? seeds[key].id : '';
+  // the contents will be missing if there is an id preceding this code
+  // block.
+  if (!seeds[key]) {
+    seeds[key] = defaultFile(lang, id);
+  }
+  if (isEmpty(node.value) && seedKey !== 'contents') {
+    const section = keyToSection[seedKey];
+    throw Error(`Empty code block in --${section}-- section`);
+  }
+
+  seeds[key][seedKey] = isEmpty(seeds[key][seedKey])
+    ? node.value
+    : seeds[key][seedKey] + '\n' + node.value;
+}
+
+function idToData(node, index, parent, seeds) {
+  const id = getId(node);
+
+  // If this is reached, the node type is neither root nor code. If it is not
+  // an id, there must be a syntax error.
+  if (!id) {
+    throw Error(
+      'Unexpected syntax in seed/solution. Must be ::id{#id} or a code ' +
+        'block (```) \n'
+    );
+  }
+  const codeNode = parent.children[index + 1];
+  if (codeNode && is(codeNode, 'code')) {
+    const key = `index${codeNode.lang}`;
+    if (seeds[key]) throw Error('::id{#id}s must come before code blocks');
+    seeds[key] = defaultFile(codeNode.lang, id);
+  } else {
+    throw Error('::id{#id}s must come before code blocks');
+  }
+}
+
+module.exports.getFileVisitor = getFileVisitor;