fix section numbers, pull links out of lessons

.editorconfig

@@ -0,0 +1,8 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+charset = utf-8
+indent_style = space
+indent_size = 2

csv.js

@@ -1,6 +1,9 @@
 const fs = require("fs").promises;
 const path = require("path");
 const fm = require("front-matter");
+const isUrl = require("is-url-superb");
+const parseLinks = require("parse-markdown-links");
+const { sorter } = require("./helpers");
 const mdDir = process.env.MARKDOWN_DIR || path.join(__dirname, "lessons/");
 const outputPath =
   process.env.OUTPUT_CSV_PATH || path.join(__dirname, "public/lessons.csv");
@@ -31,21 +34,18 @@ async function createCsv() {
   const attributes = Array.from(seenAttributes.values());
 
   if (attributes.includes("order")) {
-    frontmatters = frontmatters.sort(
-      // (a, b) => a.attributes.order - b.attributes.order
-      (a, b) => {
-        const [aSection, aLesson] = a.order.split(".");
-        const [bSection, bLesson] = b.order.split(".");
-
-        if (aSection !== bSection) {
-          return aSection - bSection;
-        }
-
-        return aLesson.charCodeAt() - bLesson.charCodeAt();
-      }
-    );
+    frontmatters = frontmatters.sort(sorter);
   }
 
+  // get links
+  attributes.push("links");
+  seenAttributes.add("links");
+  frontmatters = frontmatters.map(row => {
+    const links = parseLinks(row.body).filter(isUrl);
+    row.attributes.links = JSON.stringify(links, 0, null);
+    return row;
+  });
+
   // get all data into an array
   let rows = frontmatters.map(item => {
     const row = attributes.map(attr =>

helpers.js

@@ -0,0 +1,34 @@
+function splitSections(str) {
+  const validSectionTest = /^\d+[A-Z]+$/;
+  const numbersRegex = /^\d+/;
+  const lettersRegex = /[A-Z]+$/;
+  if (!validSectionTest.test(str)) {
+    throw new Error(
+      `${str} does not match the section format. It must be <numbers><capital letters>, like 16A or 5F (case sensitive)`
+    );
+  }
+
+  return [numbersRegex.exec(str)[0], lettersRegex.exec(str)[0]];
+}
+
+const getCharScore = str =>
+  str
+    .split("")
+    .map((char, index) => char.charCodeAt(0) * 10 ** index)
+    .reduce((acc, score) => acc + score);
+
+function sorter(a, b) {
+  const [aSec, aSub] = splitSections(a.attributes.order);
+  const [bSec, bSub] = splitSections(b.attributes.order);
+
+  // sections first
+  if (aSec !== bSec) {
+    return aSec - bSec;
+  }
+
+  // subsections next
+  return getCharScore(aSub) - getCharScore(bSub);
+}
+
+module.exports.splitSections = splitSections;
+module.exports.sorter = sorter;

lessons/intro.md

@@ -1,7 +1,7 @@
 ---
 path: "/intro"
 title: "Introduction"
-order: 1.A
+order: "1A"
 section: "The First Section"
 description: "this is the description that will show up in social shares"
 ---
@@ -17,3 +17,10 @@ This is page one.
 ```js
 const x = 2 + 2;
 ```
+
+- This is a link to [Frontend Masters][fem].
+- This another link to [Brian Holt's Twitter](https://twitter.com/holtbt).
+- Here's another link to a [site built with this starter][containers].
+
+[fem]: https://www.frontendmasters.com
+[containers]: https://btholt.github.io/complete-intro-to-containers/

lessons/page-2.md

@@ -1,7 +1,7 @@
 ---
 path: "/page-2"
 title: "Page 2"
-order: 2.A
+order: "2A"
 description: "The second page"
 section: "The Second Section"
 ---

lessons/page-3.md

@@ -0,0 +1,9 @@
+---
+path: "/page-3"
+title: "Page 3"
+order: "2B"
+description: "The third page"
+section: "The Second Section"
+---
+
+This is page three.