From 686fae85989385d1cbf66b4c39fd825333d075f3 Mon Sep 17 00:00:00 2001
From: Charles Iliya Krempeaux <iamreiver@gmail.com>
Date: Tue, 26 Sep 2023 13:26:53 +0900
Subject: [PATCH] initial commits

---
 field.go | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 field.go

diff --git a/field.go b/field.go
new file mode 100644
index 0000000..bc107ad
--- /dev/null
+++ b/field.go
@@ -0,0 +1,64 @@
+package mstdn
+
+import (
+	"encoding/json"
+
+	"sourcecode.social/reiver/go-opt"
+	"sourcecode.social/reiver/go-nul"
+)
+
+var _ json.Marshaler = Field{}
+var _ json.Unmarshaler = &Field{}
+
+// Field represents a Mastodon API "Field".
+//
+// See:
+// https://docs.joinmastodon.org/entities/Field/
+type Field struct {
+	Name         opt.Optional[string] `json:"name"`
+	Value        opt.Optional[string] `json:"value"`
+	VerifiedAt   nul.Nullable[string] `json:"verified_at"`
+}
+
+func FieldNameValue(name string, value string) Field {
+	return Field{
+		Name:  opt.Something(name),
+		Value: opt.Something(value),
+	}
+}
+
+func FieldVerifiedNameValue(when string, name string, value string) Field {
+	return Field{
+		Name:       opt.Something(name),
+		Value:      opt.Something(value),
+		VerifiedAt: nul.Something(when),
+	}
+}
+
+func (receiver Field) MarshalJSON() ([]byte, error) {
+
+	duplicate := receiver
+
+	duplicate.VerifiedAt.WhenNothing(func(){
+		duplicate.VerifiedAt = nul.Null[string]()
+	})
+
+	return json.Marshal(duplicate)
+}
+
+func (receiver *Field) UnmarshalJSON(data []byte) error {
+	if nil == receiver {
+		return errNilReceiver
+	}
+
+	err := json.Unmarshal(data, receiver)
+	if nil != err {
+		return err
+	}
+
+	if nul.Null[string]() == receiver.VerifiedAt {
+		receiver.VerifiedAt = nul.Nothing[string]()
+	}
+
+	return nil
+}