From 8788bdf6fe7d18a312ec6091e64856591650ac23 Mon Sep 17 00:00:00 2001
From: Andrej Dyck <43913051+andrej-dyck@users.noreply.github.com>
Date: Sat, 16 Dec 2023 17:22:33 +0100
Subject: [PATCH] add deep-partial utility type

---
 index.ts             |  1 +
 types/DeepPartial.ts | 28 ++++++++++++++++++++++++++++
 types/index.ts       |  1 +
 3 files changed, 30 insertions(+)
 create mode 100644 types/DeepPartial.ts
 create mode 100644 types/index.ts

diff --git a/index.ts b/index.ts
index a0b96a1..c956aa0 100644
--- a/index.ts
+++ b/index.ts
@@ -5,3 +5,4 @@ export * from './nullables/index.js'
 export * from './raise/index.js'
 export * from './records/index.js'
 export * from './sequences/index.js'
+export * from './types/index.js'
diff --git a/types/DeepPartial.ts b/types/DeepPartial.ts
new file mode 100644
index 0000000..ced307c
--- /dev/null
+++ b/types/DeepPartial.ts
@@ -0,0 +1,28 @@
+/**
+ * Partial<T>, but recursive for records.
+ */
+export type DeepPartial<T> =
+  T extends Record<PropertyKey, unknown>
+    ? { [P in keyof T]?: DeepPartial<T[P]> }
+    : T
+
+/*
+ * Example:
+ *   type Contact = {
+ *     id: string,
+ *     email: string,
+ *     address: {
+ *       street: string
+ *       city: string
+ *     }
+ *   }
+ *
+ *   type Inputs = DeepPartial<Omit<Contact, 'id'>>
+ *   // type: {
+ *        email?: string | undefined
+ *        address?: {
+ *          street?: string | undefined
+ *          city?: string | undefined
+ *        } | undefined
+ *      }
+ */
diff --git a/types/index.ts b/types/index.ts
new file mode 100644
index 0000000..0059ef5
--- /dev/null
+++ b/types/index.ts
@@ -0,0 +1 @@
+export * from './DeepPartial.js'