From 4fe133a394ede26da22acba1bb1164183029da0b Mon Sep 17 00:00:00 2001
From: Jason Streifling <jason@streifling.com>
Date: Wed, 16 Oct 2024 18:30:22 +0200
Subject: [PATCH] Create isValidMediaType and isValidLanguageTag

---
 atom.go | 12 ++++++++++++
 go.mod  |  5 ++++-
 go.sum  |  2 ++
 3 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/atom.go b/atom.go
index 850bbc8..c4a1bca 100644
--- a/atom.go
+++ b/atom.go
@@ -4,6 +4,8 @@ import (
 	"mime"
 	"regexp"
 	"strings"
+
+	"golang.org/x/text/language"
 )
 
 type (
@@ -66,3 +68,13 @@ func isXMLMediaType(mediaType string) bool {
 
 	return strings.HasSuffix(mediaType, "/xml") || strings.HasSuffix(mediaType, "+xml")
 }
+
+func isValidMediaType(mediaType string) bool {
+	_, _, err := mime.ParseMediaType(mediaType)
+	return err == nil
+}
+
+func isValidLanguageTag(tag LanguageTag) bool {
+	_, err := language.Parse(string(tag))
+	return err == nil
+}
diff --git a/go.mod b/go.mod
index ecd0ab9..54d50a3 100644
--- a/go.mod
+++ b/go.mod
@@ -2,4 +2,7 @@ module streifling.com/jason/atom-feed
 
 go 1.23.2
 
-require github.com/google/uuid v1.6.0
+require (
+	github.com/google/uuid v1.6.0
+	golang.org/x/text v0.19.0
+)
diff --git a/go.sum b/go.sum
index 7790d7c..3eb98bc 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +1,4 @@
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+golang.org/x/text v0.19.0 h1:kTxAhCbGbxhK0IwgSKiMO5awPoDQ0RpfiVYBfK860YM=
+golang.org/x/text v0.19.0/go.mod h1:BuEKDfySbSR4drPmRPG/7iBdf8hvFMuRexcpahXilzY=