From 6b82a83b87bedd6cf66f47d608b8593550968ec5 Mon Sep 17 00:00:00 2001
From: Gordon Brander <gordonbrander@users.noreply.github.com>
Date: Wed, 29 Mar 2023 11:13:08 -0400
Subject: [PATCH] Start example

---
 Sources/ObservableStore/ObservableStore.swift | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/Sources/ObservableStore/ObservableStore.swift b/Sources/ObservableStore/ObservableStore.swift
index 4172523..99850c8 100644
--- a/Sources/ObservableStore/ObservableStore.swift
+++ b/Sources/ObservableStore/ObservableStore.swift
@@ -93,6 +93,13 @@ extension ModelProtocol {
     }
 }
 
+public protocol ModelFactoryProtocol: ModelProtocol {
+    static func start(
+        state: Self,
+        environment: Self.Environment
+    ) -> Update<Self>
+}
+
 /// Update represents a state change, together with an `Fx` publisher,
 /// and an optional `Transaction`.
 public struct Update<Model: ModelProtocol> {
@@ -297,6 +304,17 @@ where Model: ModelProtocol
     }
 }
 
+extension Store where Model: ModelFactoryProtocol {
+    public convenience init(
+        initial: Model,
+        environment: Model.Environment
+    ) {
+        let update = Model.start(state: initial, environment: environment)
+        self.init(state: update.state, environment: environment)
+        self.subscribe(to: update.fx)
+    }
+}
+
 public struct ViewStore<ViewModel: ModelProtocol>: StoreProtocol {
     private var _send: (ViewModel.Action) -> Void
     public var state: ViewModel