From a31cb708f80fbfe8765c07e55a24d46953e4d3d5 Mon Sep 17 00:00:00 2001
From: danielpygo <ddmoorish@gmail.com>
Date: Fri, 31 Aug 2018 17:16:53 -0500
Subject: [PATCH] fielddiff and fulldiff share a method getdiff. fixed
 comparison between maps compareMaps.

---
 pkg/provenance/provenance.go | 65 +++++++-----------------------------
 1 file changed, 12 insertions(+), 53 deletions(-)

diff --git a/pkg/provenance/provenance.go b/pkg/provenance/provenance.go
index e5b392e..92a1837 100644
--- a/pkg/provenance/provenance.go
+++ b/pkg/provenance/provenance.go
@@ -455,52 +455,7 @@ func (o ObjectLineage) FullDiff(vNumStart, vNumEnd int) string {
 	for attribute, data1 := range sp1.AttributeToData {
 		data2, ok := sp2.AttributeToData[attribute] //check if the attribute even exists
 		if ok {
-			str1, ok1 := data1.(string)
-			str2, ok2 := data2.(string)
-			if ok1 && ok2 && str1 != str2 {
-				fmt.Fprintf(&b, "Found diff on attribute %s:\n", attribute)
-				fmt.Fprintf(&b, "\tVersion %d: %s\n", vNumStart, data1)
-				fmt.Fprintf(&b, "\tVersion %d: %s\n", vNumEnd, data2)
-			}
-			int1, ok1 := data1.(int)
-			int2, ok2 := data2.(int)
-			if ok1 && ok2 && int1 != int2 {
-				fmt.Fprintf(&b, "Found diff on attribute %s:\n", attribute)
-				fmt.Fprintf(&b, "\tVersion %d: %d\n", vNumStart, int1)
-				fmt.Fprintf(&b, "\tVersion %d: %d\n", vNumEnd, int2)
-			}
-			strArray1, ok1 := data1.([]string)
-			strArray2, ok2 := data2.([]string)
-			if ok1 && ok2 {
-				for _, str := range strArray1 {
-					found := false
-					for _, val := range strArray2 {
-						if str == val {
-							found = true
-						}
-					}
-					if !found { // if an element does not have a match in the next version
-						fmt.Fprintf(&b, "Found diff on attribute %s:\n", attribute)
-						fmt.Fprintf(&b, "\tVersion %d: %s\n", vNumStart, strArray1)
-						fmt.Fprintf(&b, "\tVersion %d: %s\n", vNumEnd, strArray2)
-					}
-				}
-			}
-			strMap1, ok1 := data1.([]map[string]string)
-			strMap2, ok2 := data2.([]map[string]string)
-			if ok1 && ok2 {
-				if len(strMap1) != len(strMap2) {
-					fmt.Fprintf(&b, "Found diff on attribute %s:\n", attribute)
-					fmt.Fprintf(&b, "\tVersion %d: %s\n", vNumStart, strMap1)
-					fmt.Fprintf(&b, "\tVersion %d: %s\n", vNumEnd, strMap2)
-				}
-				if !compareMaps(strMap1,strMap2){
-					fmt.Fprintf(&b, "Found diff on attribute %s:\n", attribute)
-					fmt.Fprintf(&b, "\tVersion %d: %s\n", vNumStart, strMap1)
-					fmt.Fprintf(&b, "\tVersion %d: %s\n", vNumEnd, strMap2)
-				}
-			}
-
+			getDiff(b, attribute, data1, data2, vNumStart, vNumEnd)
 		} else { //for the case where a key exists in spec 1 that doesn't exist in spec 2
 			fmt.Fprintf(&b, "Found diff on attribute %s:\n", attribute)
 			fmt.Fprintf(&b, "\tVersion %d: %s\n", vNumStart, data1)
@@ -517,13 +472,7 @@ func (o ObjectLineage) FullDiff(vNumStart, vNumEnd int) string {
 	}
 	return b.String()
 }
-func (o ObjectLineage) FieldDiff(fieldName string, vNumStart, vNumEnd int) string {
-	var b strings.Builder
-	data1, ok1 := o[vNumStart].AttributeToData[fieldName]
-	data2, ok2 := o[vNumEnd].AttributeToData[fieldName]
-
-	switch {
-	case ok1 && ok2:
+func getDiff(b strings.Builder, fieldName string, data1, data2 interface{}, vNumStart, vNumEnd int) string{
 		str1, ok1 := data1.(string)
 		str2, ok2 := data2.(string)
 		if ok1 && ok2 && str1 != str2 {
@@ -570,6 +519,16 @@ func (o ObjectLineage) FieldDiff(fieldName string, vNumStart, vNumEnd int) strin
 			}
 		}
 
+
+	return b.String()
+}
+func (o ObjectLineage) FieldDiff(fieldName string, vNumStart, vNumEnd int) string {
+	var b strings.Builder
+	data1, ok1 := o[vNumStart].AttributeToData[fieldName]
+	data2, ok2 := o[vNumEnd].AttributeToData[fieldName]
+	switch {
+	case ok1 && ok2:
+		return getDiff(b, fieldName,data1, data2, vNumStart, vNumEnd)
 	case !ok1 && ok2:
 		fmt.Fprintf(&b, "Found diff on attribute %s:\n", fieldName)
 		fmt.Fprintf(&b, "\tVersion %d: %s\n", vNumStart, "No attribute found.")