add utils functions file

supercoderhawk · supercoderhawk · commit b4972b294c82 · 2017-07-04T12:11:41.000+08:00
diff --git a/app/src/renderer/utils/utils.js b/app/src/renderer/utils/utils.js
@@ -0,0 +1,15 @@
+export function isRangeValid (start, end, items) {
+  if (items.length === 0) {
+    return true
+  }
+  let before = items.filter(item => { return item.end < start })
+  let beforeLength = before.length
+
+  if (beforeLength === 0) {
+    return false
+  } else if (beforeLength === items.length) {
+    return true
+  }
+
+  return end < items[beforeLength].start
+}
