logically group modules into folders

src/shared/getComponentOption.js

@@ -0,0 +1,50 @@
+import deepmerge from 'deepmerge'
+
+/**
+ * Returns the `opts.option` $option value of the given `opts.component`.
+ * If methods are encountered, they will be bound to the component context.
+ * If `opts.deep` is true, will recursively merge all child component
+ * `opts.option` $option values into the returned result.
+ *
+ * @param  {Object} opts - options
+ * @param  {Object} opts.component - Vue component to fetch option data from
+ * @param  {String} opts.option - what option to look for
+ * @param  {Boolean} opts.deep - look for data in child components as well?
+ * @param  {Object} [result={}] - result so far
+ * @return {Object} - final aggregated result
+ */
+export default function getComponentOption (opts, result = {}) {
+  const { component, option, deep } = opts
+  const { $options } = component
+
+  // only collect option data if it exists
+  if ($options[option]) {
+    const data = $options[option]
+
+    // TODO: check data is plain object, throw if not
+
+    // bind context of option methods (if any) to this component
+    for (const key in data) {
+      if (data.hasOwnProperty(key)) {
+        const value = data[key]
+        if (typeof value === 'function') {
+          data[key] = value.bind(component)
+        }
+      }
+    }
+
+    // merge with existing options
+    result = deepmerge(result, data)
+  }
+
+  // collect & aggregate child options if deep = true
+  if (deep) {
+    const { $children } = component
+    for (let i = 0, len = $children.length; i < len; i++) {
+      const component = $children[i]
+      result = getComponentOption({ option, deep, component }, result)
+    }
+  }
+
+  return result
+}