add html5 preset, some files structure changes

packages/bbob-html/lib/index.js

@@ -0,0 +1,61 @@
+function escapeQuote(value) {
+  return value.replace(/"/g, '"');
+}
+
+function attrValue(name, value) {
+  if (typeof value === 'boolean' && value) {
+    return `${name}`;
+  } else if (typeof value === 'number') {
+    return `${name}="${value}"`;
+  } else if (typeof value === 'string') {
+    return `${name}="${escapeQuote(value)}"`;
+  } else if (typeof value === 'object') {
+    return `${name}="${escapeQuote(JSON.stringify(value))}"`;
+  }
+  return '';
+}
+
+/**
+ * Transforms attrs to html params string
+ * @param values
+ */
+const attrs = values =>
+  Object.keys(values)
+    .reduce((arr, key) => [...arr, attrValue(key, values[key])], [''])
+    .join(' ');
+
+function traverse(tree, cb) {
+  if (Array.isArray(tree)) {
+    tree.forEach((_, i) => {
+      traverse(cb(tree[i]), cb);
+    });
+  } else if (typeof tree === 'object' && tree.content) {
+    traverse(tree.content, cb);
+  }
+
+  return tree;
+}
+
+function renderNodes(nodes) {
+  return [].concat(nodes).reduce((r, node) => r + renderNode(node), '');
+}
+
+function renderNode(node) {
+  if (!node) return;
+
+  if (typeof node === 'string' || typeof node === 'number') {
+    return node;
+  }
+
+  if (typeof node === 'object') {
+    return `<${node.tag}${attrs(node.attrs)}>${renderNodes(node.content)}</${node.tag}>`;
+  }
+
+  if (Array.isArray(node)) {
+    return renderNodes(node);
+  }
+
+  return '';
+}
+
+module.exports = renderNodes;