From c8e008636d011c2bdc86a3028501d79fc4d33a45 Mon Sep 17 00:00:00 2001
From: Will Faught <willfaught@users.noreply.github.com>
Date: Fri, 14 Feb 2025 21:25:29 -0800
Subject: [PATCH] Filter for valid link rel values

---
 layouts/_default/list.atom.xml | 24 ++++++++++++++++++------
 layouts/_default/list.rss.xml  | 11 +++++++----
 2 files changed, 25 insertions(+), 10 deletions(-)

diff --git a/layouts/_default/list.atom.xml b/layouts/_default/list.atom.xml
index 192ece30..9178868d 100644
--- a/layouts/_default/list.atom.xml
+++ b/layouts/_default/list.atom.xml
@@ -65,19 +65,22 @@
     {{ end }}
 
     {{ range $page.OutputFormats }}
+        {{ $kind := not (hasSuffix .Permalink "/paige-search.json") }}
         {{ $rel := cond (eq .Rel "canonical") "self" .Rel }}
-        {{ $suffix := hasSuffix .Permalink "/paige-search.json" }}
 
-        {{ if not $suffix }}
+        {{ $valid := in (slice "alternate" "enclosure" "related" "self" "via") $rel }}
+
+        {{ if and $kind $valid }}
             <link href="{{ .Permalink }}" hreflang="{{ $page.Language.LanguageCode }}" rel="{{ $rel }}" type="{{ .MediaType }}"/>
         {{ end }}
     {{ end }}
 
     {{ range $t := $page.Translations }}
         {{ range .OutputFormats }}
-            {{ $suffix := hasSuffix .Permalink "/paige-search.json" }}
+            {{ $kind := not (hasSuffix .Permalink "/paige-search.json") }}
+            {{ $valid := in (slice "alternate" "enclosure" "related" "self" "via") .Rel }}
 
-            {{ if not $suffix }}
+            {{ if and $kind $valid }}
                 <link href="{{ .Permalink }}" hreflang="{{ $t.Language.LanguageCode }}" rel="{{ .Rel }}" type="{{ .MediaType }}"/>
             {{ end }}
         {{ end }}
@@ -155,16 +158,25 @@
                 {{ end }}
 
                 {{ range .OutputFormats }}
+                    {{ $kind := not (hasSuffix .Permalink "/paige-search.json") }}
                     {{ $rel := cond (eq .Rel "canonical") "self" .Rel }}
 
                     {{ $href := cond (and (eq $rel "alternate") (eq .MediaType.Type "text/html")) $link .Permalink }}
+                    {{ $valid := in (slice "alternate" "enclosure" "related" "self" "via") $rel }}
 
-                    <link href="{{ $href }}" rel="{{ $rel }}" type="{{ .MediaType }}"/>
+                    {{ if and $kind $valid }}
+                        <link href="{{ $href }}" rel="{{ $rel }}" type="{{ .MediaType }}"/>
+                    {{ end }}
                 {{ end }}
 
                 {{ range $t := .Translations }}
                     {{ range .OutputFormats }}
-                        <link href="{{ .Permalink }}" hreflang="{{ $t.Lang }}" rel="{{ .Rel }}" type="{{ .MediaType }}"/>
+                        {{ $kind := not (hasSuffix .Permalink "/paige-search.json") }}
+                        {{ $valid := in (slice "alternate" "enclosure" "related" "self" "via") .Rel }}
+
+                        {{ if and $kind $valid }}
+                            <link href="{{ .Permalink }}" hreflang="{{ $t.Lang }}" rel="{{ .Rel }}" type="{{ .MediaType }}"/>
+                        {{ end }}
                     {{ end }}
                 {{ end }}
 
diff --git a/layouts/_default/list.rss.xml b/layouts/_default/list.rss.xml
index 31c8ee4f..d7898bd6 100644
--- a/layouts/_default/list.rss.xml
+++ b/layouts/_default/list.rss.xml
@@ -41,19 +41,22 @@
 <rss version="2.0" {{ with $language }} xml:lang="{{ . }}" {{ end }} xmlns:atom="http://www.w3.org/2005/Atom">
     <channel>
         {{ range $page.OutputFormats }}
+            {{ $kind := not (hasSuffix .Permalink "/paige-search.json") }}
             {{ $rel := cond (eq .Rel "canonical") "self" .Rel }}
-            {{ $suffix := hasSuffix .Permalink "/paige-search.json" }}
 
-            {{ if not $suffix }}
+            {{ $valid := in (slice "alternate" "enclosure" "related" "self" "via") $rel }}
+
+            {{ if and $kind $valid }}
                 <atom:link href="{{ .Permalink }}" hreflang="{{ .Language.LanguageCode }}" rel="{{ $rel }}" type="{{ .MediaType }}"/>
             {{ end }}
         {{ end }}
 
         {{ range $t := $page.Translations }}
             {{ range .OutputFormats }}
-                {{ $suffix := hasSuffix .Permalink "/paige-search.json" }}
+                {{ $kind := not (hasSuffix .Permalink "/paige-search.json") }}
+                {{ $valid := in (slice "alternate" "enclosure" "related" "self" "via") .Rel }}
 
-                {{ if not $suffix }}
+                {{ if and $kind $valid }}
                     <atom:link href="{{ .Permalink }}" hreflang="{{ $t.Language.LanguageCode }}" rel="{{ .Rel }}" type="{{ .MediaType }}"/>
                 {{ end }}
             {{ end }}