From 686abcd72d81e990cef2719a7ab37508948b1ba8 Mon Sep 17 00:00:00 2001
From: Pablo Morelli <pabmorelli@gmail.com>
Date: Wed, 28 Apr 2021 17:55:17 +0200
Subject: [PATCH] born

---
 .gitignore |  1 +
 go.mod     |  3 +++
 int.go     | 34 ++++++++++++++++++++++++++++++++++
 string.go  | 34 ++++++++++++++++++++++++++++++++++
 4 files changed, 72 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 go.mod
 create mode 100644 int.go
 create mode 100644 string.go

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..485dee6
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.idea
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..022b34e
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module github.com/pmorelli92/maybe
+
+go 1.16
diff --git a/int.go b/int.go
new file mode 100644
index 0000000..98e61f2
--- /dev/null
+++ b/int.go
@@ -0,0 +1,34 @@
+package maybe
+
+import "encoding/json"
+
+type Int struct {
+	Value    int
+	HasValue bool
+}
+
+func (ms *Int) UnmarshalJSON(data []byte) error {
+	var s *int
+	if err := json.Unmarshal(data, &s); err != nil {
+		return err
+	}
+
+	if s != nil {
+		*ms = Int{
+			Value:    *s,
+			HasValue: true,
+		}
+	}
+
+	return nil
+}
+
+func (ms Int) MarshalJSON() ([]byte, error) {
+	var s *int
+
+	if ms.HasValue {
+		s = &ms.Value
+	}
+
+	return json.Marshal(s)
+}
diff --git a/string.go b/string.go
new file mode 100644
index 0000000..15aa94f
--- /dev/null
+++ b/string.go
@@ -0,0 +1,34 @@
+package maybe
+
+import "encoding/json"
+
+type String struct {
+	Value    string
+	HasValue bool
+}
+
+func (ms *String) UnmarshalJSON(data []byte) error {
+	var s *string
+	if err := json.Unmarshal(data, &s); err != nil {
+		return err
+	}
+
+	if s != nil {
+		*ms = String{
+			Value:    *s,
+			HasValue: true,
+		}
+	}
+
+	return nil
+}
+
+func (ms String) MarshalJSON() ([]byte, error) {
+	var s *string
+
+	if ms.HasValue {
+		s = &ms.Value
+	}
+
+	return json.Marshal(s)
+}