From fa099176f9c20dcd57fe6e845da07aff1bcf81b9 Mon Sep 17 00:00:00 2001
From: Stanislav Seletskiy <s.seletskiy@gmail.com>
Date: Tue, 22 Sep 2015 17:58:15 +0600
Subject: [PATCH] refactoring and check on errors

---
 main.go | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/main.go b/main.go
index cd94c2e..c72c27b 100644
--- a/main.go
+++ b/main.go
@@ -185,6 +185,18 @@ func updatePage(
 ) error {
 	nextPageVersion := pageInfo.Version.Number + 1
 
+	if len(pageInfo.Ancestors) == 0 {
+		return fmt.Errorf(
+			"Page '%s' info does not contain any information about parents",
+			pageID,
+		)
+	}
+
+	// picking only the last one, which is required by confluence
+	oldAncestors := []map[string]interface{}{
+		{"id": pageInfo.Ancestors[len(pageInfo.Ancestors)-1].Id},
+	}
+
 	payload := map[string]interface{}{
 		"id":    pageID,
 		"type":  "page",
@@ -193,9 +205,7 @@ func updatePage(
 			"number":    nextPageVersion,
 			"minorEdit": false,
 		},
-		"ancestors": []map[string]interface{}{
-			{"id": pageInfo.Ancestors[len(pageInfo.Ancestors)-1].Id},
-		},
+		"ancestors": oldAncestors,
 		"body": map[string]interface{}{
 			"storage": map[string]interface{}{
 				"value":          string(newContent),