add validation methods on build json object

Author: ShMcK

cli.js

@@ -5,7 +5,7 @@ var program = require('commander'),
 program
   .version('0.0.1')
   .usage('[options] <keywords>')
-  .option('-b, --build [tutorial.md]', 'Tutorial Markdown file', /^.+\.md$/i)
+  .option('-b, --build [tutorial.md]', 'tutorial .md file', /^.+\.md$/i)
   .parse(process.argv);
 if (!program.args.length) {
   program.help();
@@ -14,14 +14,10 @@ if (!program.args.length) {
     (function() {
       var tutorial = program.args[0];
       var output = 'coderoad.json';
-      if (!tutorial) {
-        console.log(chalk.red("\n        Pass in a path to your .md file, otherwise it defaults to README.md\n        For example: npm start ./src/source.md\n        "));
-        process.exit(1);
-      }
       var build = require('./src/build');
       console.log(chalk.grey("building from " + tutorial + "..."));
       build(tutorial, output);
+      process.exit(0);
     })();
-    process.exit(0);
   }
 }

src/build.js

@@ -1,5 +1,6 @@
 "use strict";
 var fs = require('fs');
+var chalk = require('chalk');
 function line(char, times) {
     return new RegExp('^' + char + '{' + times + '}(?!#)(.*?)$', 'gm');
 }
@@ -212,21 +213,33 @@ function isValidJSON(text) {
         return false;
     }
 }
+function hasProjectInfo(text) {
+    var validTitle = text.project.title.length > 0, validDescription = text.project.description.length > 0;
+    return validTitle && validDescription;
+}
+function hasPage(text) {
+    return (text.chapters[0].pages.length > 0 && !!text.chapters[0].pages[0].title);
+}
 module.exports = function (filePath, output) {
     if (output === void 0) { output = './coderoad.json'; }
+    if (!filePath) {
+        console.log(chalk.red("\n    Pass in a path to your .md file\n    For example: coderoad build ./src/tutorial.md\n    "));
+        process.exit(1);
+    }
     var lines = fs.readFileSync(filePath, 'utf8').split('\n');
     var result = cleanup(build(lines));
     if (!isValidJSON(result)) {
-        console.log('Invalid JSON output');
-        process.exit(0);
+        console.log(chalk.red("\n      Something went wrong. There seems to be an error in " + filePath + ".\n      "));
+        process.exit(1);
     }
-    else {
-        try {
-            fs.writeFileSync(output, result, 'utf8');
-        }
-        catch (e) {
-            console.log(e);
-            process.exit(0);
-        }
+    var jsonObject = JSON.parse(result);
+    if (!hasProjectInfo(jsonObject)) {
+        console.log(chalk.red("\n      Your tutorial is missing basic project information. Check the project title & description.\n      "));
+        process.exit(1);
+    }
+    else if (!hasPage(jsonObject)) {
+        console.log(chalk.red("\n      Your tutorial requires at least one page.\n      "));
+        process.exit(1);
     }
+    fs.writeFileSync(output, result, 'utf8');
 };