From e92923b74201289fbed5a4bca273887faa36e39a Mon Sep 17 00:00:00 2001
From: Simon Leeb <52261246+sliemeobn@users.noreply.github.com>
Date: Tue, 25 Jun 2024 21:11:38 +0200
Subject: [PATCH] added charset attribute

---
 Sources/Elementary/HtmlAttributes.swift       | 31 ++++++++++++++++++-
 .../AttributeRenderingTests.swift             |  7 +++++
 2 files changed, 37 insertions(+), 1 deletion(-)

diff --git a/Sources/Elementary/HtmlAttributes.swift b/Sources/Elementary/HtmlAttributes.swift
index 716e6ce..7ec1da6 100644
--- a/Sources/Elementary/HtmlAttributes.swift
+++ b/Sources/Elementary/HtmlAttributes.swift
@@ -142,8 +142,37 @@ public extension HTMLAttribute where Tag: HTMLTrait.Attributes.autofocus {
     }
 }
 
-// form tag attributes
+// charset attribute
+public extension HTMLTrait.Attributes {
+    protocol charset {}
+}
+
+extension HTMLTag.meta: HTMLTrait.Attributes.charset {}
+extension HTMLTag.script: HTMLTrait.Attributes.charset {}
+
+public extension HTMLAttributeValue {
+    struct CharacterSet: ExpressibleByStringLiteral, RawRepresentable, Sendable, Equatable {
+        public var rawValue: String
+
+        public init(rawValue: String) {
+            self.rawValue = rawValue
+        }
+
+        public init(stringLiteral value: String) {
+            rawValue = value
+        }
+
+        public static var utf8: Self { "UTF-8" }
+    }
+}
 
+public extension HTMLAttribute where Tag: HTMLTrait.Attributes.charset {
+    static func charset(_ value: HTMLAttributeValue.CharacterSet) -> Self {
+        HTMLAttribute(name: "charset", value: value.rawValue)
+    }
+}
+
+// form tag attributes
 public extension HTMLAttribute where Tag == HTMLTag.form {
     struct Method: Sendable, Equatable {
         var value: String
diff --git a/Tests/ElementaryTests/AttributeRenderingTests.swift b/Tests/ElementaryTests/AttributeRenderingTests.swift
index 24648da..94aff4b 100644
--- a/Tests/ElementaryTests/AttributeRenderingTests.swift
+++ b/Tests/ElementaryTests/AttributeRenderingTests.swift
@@ -88,4 +88,11 @@ final class AttributeRenderingTests: XCTestCase {
             #"<p onblur="doIt()"></p>"#
         )
     }
+
+    func testRendersMetaCharset() {
+        HTMLAssertEqual(
+            meta(.charset(.utf8)),
+            #"<meta charset="UTF-8">"#
+        )
+    }
 }