Generate search_index.json when generating site

Fixes #24

1 files changed, 71 insertions, 0 deletions

diff --git a/lib/generate/site/search_indexer.js b/lib/generate/site/search_indexer.js
new file mode 100644
index 0000000..b239b8b
--- /dev/null
+++ b/lib/generate/site/search_indexer.js
@@ -0,0 +1,71 @@
+var Q = require("q");
+var _ = require("lodash");
+
+var lunr = require('lunr');
+var marked = require('marked');
+var textRenderer = require('marked-text-renderer');
+
+
+function Indexer() {
+    if(!(this instanceof Indexer)) {
+        return new Indexer();
+    }
+
+    _.bindAll(this);
+
+    // Setup lunr index
+    this.idx = lunr(function () {
+        this.ref('url');
+
+        this.field('title', { boost: 10 });
+        this.field('body');
+    });
+
+    this.renderer = textRenderer();
+}
+
+Indexer.prototype.text = function(nodes) {
+    // Copy section
+    var section = _.toArray(nodes);
+
+    // marked's Render expects this, we don't use it yet
+    section.links = {};
+
+    var options = _.extend({}, marked.defaults, {
+        renderer: this.renderer
+    });
+
+    return marked.parser(section, options);
+};
+
+Indexer.prototype.addSection = function(path, section) {
+    var url = [path, section.id].join('#');
+
+    var title = this.text(
+        _.filter(section, {'type': 'heading'})
+    );
+
+    var body = this.text(
+        _.omit(section, {'type': 'heading'})
+    );
+
+    // Add to lunr index
+    this.idx.add({
+        url: url,
+        title: title,
+        body: body,
+    });
+};
+
+Indexer.prototype.add = function(lexedPage, url) {
+    var sections = lexedPage;
+
+    _.map(sections, _.partial(this.addSection, url));
+};
+
+Indexer.prototype.dump = function() {
+    return JSON.stringify(this.idx);
+};
+
+// Exports
+module.exports = Indexer;