Move summary & page parsing code to lib/parse/

1 files changed, 62 insertions, 0 deletions

diff --git a/lib/parse/page.js b/lib/parse/page.js
new file mode 100644
index 0000000..047f3e4
--- /dev/null
+++ b/lib/parse/page.js
@@ -0,0 +1,62 @@
+var _ = require('lodash');
+var marked = require('marked');
+
+
+// Split a page up into sections (lesson, exercises, ...)
+function splitSections(nodes) {
+    var section = [];
+
+    return _.reduce(nodes, function(sections, el) {
+        if(el.type === 'hr') {
+            sections.push(section);
+            section = [];
+        } else {
+            section.push(el);
+        }
+
+        return sections;
+    }, []).concat([section]); // Add remaining nodes
+}
+
+// What is the type of this section
+function sectionType(nodes) {
+    if(_.filter(nodes, {
+        type: 'code'
+    }).length === 3) {
+        return 'exercise';
+    }
+
+    return 'normal';
+}
+
+function parsePage(src) {
+    var nodes = marked.lexer(src);
+
+    return _.chain(splitSections(nodes))
+    .map(function(section) {
+        // Detect section type
+        section.type = sectionType(section);
+        return section;
+    })
+    .map(function(section, idx) {
+        // Transform given type
+        if(section.type === 'exercise' && (idx % 2) == 1) {
+            return {
+                type: section.type,
+            };
+        }
+
+        // marked's Render expects this, we don't use it yet
+        section.links = {};
+
+        // Render normal pages
+        return {
+            type: section.type,
+            content: marked.parser(section)
+        };
+    })
+    .value();
+}
+
+// Exports
+module.exports = parsePage;