Fix some snippets, start creating scripts

scripts/util.js

@@ -0,0 +1,95 @@
+const fs = require("fs-extra");
+const path = require("path");
+const chalk = require("chalk");
+
+const SNIPPETS_PATH = "./snippets";
+
+const attempt = (task, cb) => {
+  try {
+    return cb();
+  } catch (e) {
+    console.log(`${chalk.red("ERROR!")} During ${task}: ${e}`);
+    process.exit(1);
+    return null;
+  }
+};
+
+const capitalize = ([first, ...rest], lowerRest = false) =>
+  first.toUpperCase() + (lowerRest ? rest.join("").toLowerCase() : rest.join(""));
+
+const readSnippets = () =>
+  attempt("read snippets", () =>
+    fs
+      .readdirSync(SNIPPETS_PATH)
+      .sort((a, b) => (a.toLowerCase() < b.toLowerCase() ? -1 : 1))
+      .reduce((acc, name) => {
+        acc[name] = fs
+          .readFileSync(path.join(SNIPPETS_PATH, name), "utf8")
+          .replace(/\r\n/g, "\n");
+        return acc;
+      }, {})
+  );
+
+const getCodeBlocks = str => {
+  const regex = /```[.\S\s]*?```/g;
+  const results = [];
+  let m = null;
+  while ((m = regex.exec(str)) !== null) {
+    if (m.index === regex.lastIndex) {
+      regex.lastIndex += 1;
+    }
+    m.forEach(match => results.push(match));
+  }
+  return results;
+}
+
+const getSection = (searchString, contents, includeSubsections = true) => {
+  const indexOfSearch = contents.indexOf(searchString);
+  if (indexOfSearch < 0) return "";
+
+  let endSearch = "\\n#"
+  if (includeSubsections) {
+    let i;
+    for (i = 0; searchString[i] === "#" && i < searchString.length; i++);
+
+    if (i > 0) {
+      endSearch += `{${i - 1},${i}}[^#]`;
+    }
+  }
+  const endRegex = new RegExp(endSearch);
+
+  const sliceStart = indexOfSearch + searchString.length + 1;
+  const endIndex = contents.slice(sliceStart).search(endRegex);
+  const sliceEnd = endIndex === -1 ? undefined : endIndex + sliceStart;
+
+  return contents.slice(sliceStart, sliceEnd).trim();
+}
+
+const getTextualContent = str => {
+  const regex = /###.*\n*([\s\S]*?)```/g;
+  const results = [];
+  let m = null;
+  while ((m = regex.exec(str)) !== null) {
+    if (m.index === regex.lastIndex)
+      regex.lastIndex += 1;
+
+    m.forEach((match, groupIndex) => {
+      results.push(match);
+    });
+  }
+  return results[1];
+};
+
+const getTitle = (contents) =>
+  contents.split('\n')[0].replace(/^#+\s+/g,'');
+
+module.exports = {
+  attempt,
+  readSnippets,
+  SNIPPETS_PATH,
+  capitalize,
+  getTextualContent,
+  getCodeBlocks,
+  getSection,
+  getTitle
+};