Function diffArrayNodes

diff/structured.go:249–312

(changes *[]FieldChange, tokens []string, oldNode, newNode interface{})

}

func diffArrayNodes(changes *[]FieldChange, tokens []string, oldNode, newNode interface{}) error {
	oldArr, _ := oldNode.([]interface{})
	newArr, _ := newNode.([]interface{})

	maxLen := len(oldArr)
	if len(newArr) > maxLen {
		maxLen = len(newArr)
	}

	for i := 0; i < maxLen; i++ {
		next := append(tokens, strconv.Itoa(i))
		var oldVal interface{}
		var newVal interface{}
		if i < len(oldArr) {
			oldVal = oldArr[i]
		}
		if i < len(newArr) {
			newVal = newArr[i]
		}

		switch {
		case oldVal != nil && newVal != nil:
			if reflect.DeepEqual(oldVal, newVal) {
				continue
			}
			subPatch, err := createNodePatch(oldVal, newVal)
			if err != nil {
				return err
			}
			if subPatch == nil {
				path, field := splitTokens(next)
				*changes = append(*changes, FieldChange{
					Path:     path,
					Field:    field,
					Change:   "replace",
					OldValue: oldVal,
					NewValue: newVal,
				})
				continue
			}
			if err := walkPatch(changes, next, subPatch, oldVal, newVal); err != nil {
				return err
			}
		case oldVal != nil:
			path, field := splitTokens(next)
			*changes = append(*changes, FieldChange{
				Path:     path,
				Field:    field,
				Change:   "remove",
				OldValue: oldVal,
			})
		case newVal != nil:
			path, field := splitTokens(next)
			*changes = append(*changes, FieldChange{
				Path:     path,
				Field:    field,
				Change:   "add",
				NewValue: newVal,