From e1611f41398948fc9b86ef22a67909a2685b5e72 Mon Sep 17 00:00:00 2001
From: Emory Dunn <emory@emorydunn.com>
Date: Fri, 29 Dec 2023 08:23:40 -0800
Subject: [PATCH] Add precondition to check UUID

Confirm action UUIDs are valid

- lowercase alphanumeric characters (a-z, 0-9)
- hyphen (-)
- period (.)
---
 Sources/StreamDeck/Extensions/CharSet+DNS.swift  | 16 ++++++++++++++++
 .../PluginManifest/PluginAction.swift            |  7 +++++++
 2 files changed, 23 insertions(+)
 create mode 100644 Sources/StreamDeck/Extensions/CharSet+DNS.swift

diff --git a/Sources/StreamDeck/Extensions/CharSet+DNS.swift b/Sources/StreamDeck/Extensions/CharSet+DNS.swift
new file mode 100644
index 0000000..9932773
--- /dev/null
+++ b/Sources/StreamDeck/Extensions/CharSet+DNS.swift
@@ -0,0 +1,16 @@
+//
+//  CharSet+DNS.swift
+//
+//
+//  Created by Emory Dunn on 12/29/23.
+//
+
+import Foundation
+
+
+public extension CharacterSet {
+	static var reverseDNS = CharacterSet
+		.lowercaseLetters
+		.union(.decimalDigits)
+		.union(CharacterSet(arrayLiteral: ".", "-"))
+}
diff --git a/Sources/StreamDeck/Support Models/PluginManifest/PluginAction.swift b/Sources/StreamDeck/Support Models/PluginManifest/PluginAction.swift
index 74d1e9e..453ea41 100644
--- a/Sources/StreamDeck/Support Models/PluginManifest/PluginAction.swift	
+++ b/Sources/StreamDeck/Support Models/PluginManifest/PluginAction.swift	
@@ -80,6 +80,10 @@ struct PluginAction: Codable {
 		 visibleInActionsList: Bool? = nil,
 		 userTitleEnabled: Bool? = nil,
 		 disableAutomaticStates: Bool? = nil) {
+
+		precondition(CharacterSet(charactersIn: uuid).isSubset(of: .reverseDNS),
+					 "The UUID must be a uniform type identifier that contains only lowercase alphanumeric characters (a-z, 0-9), hyphen (-), and period (.)")
+
 		self.name = name
 		self.uuid = uuid
 		self.icon = icon
@@ -103,6 +107,9 @@ struct PluginAction: Codable {
 	}
 
 	init(action: any Action.Type) {
+		precondition(CharacterSet(charactersIn: action.uuid).isSubset(of: .reverseDNS), 
+					 "The UUID must be a uniform type identifier that contains only lowercase alphanumeric characters (a-z, 0-9), hyphen (-), and period (.)")
+
 		self.name = action.name
 		self.uuid = action.uuid
 		self.icon = action.icon