From a5aba5093869be4ace9f40450fbccc4d33080510 Mon Sep 17 00:00:00 2001
From: George Cushen <gcushen@users.noreply.github.com>
Date: Sat, 1 Jun 2024 14:25:52 +0100
Subject: [PATCH] feat: reimplement backlinks

---
 .../_markup/render-link.backlinks.json        | 20 +++++++-----------
 .../layouts/_default/home.backlinks.json      | 11 ++--------
 .../partials/components/backlinks.html        | 21 +++++++++----------
 3 files changed, 20 insertions(+), 32 deletions(-)

diff --git a/modules/blox-tailwind/layouts/_default/_markup/render-link.backlinks.json b/modules/blox-tailwind/layouts/_default/_markup/render-link.backlinks.json
index cc67e563..0200eb60 100644
--- a/modules/blox-tailwind/layouts/_default/_markup/render-link.backlinks.json
+++ b/modules/blox-tailwind/layouts/_default/_markup/render-link.backlinks.json
@@ -1,18 +1,14 @@
-{{- $u := urls.Parse .Destination -}}
-{{- if or $u.IsAbs (strings.HasPrefix $u.String "#") }}
-  {{- /* do nothing */}}
-{{- else }}
-  {{- with .PageInner.GetPage (strings.TrimPrefix "./" $u.Path) }}
-    {{- $source := dict
+{{- $url_struct := urls.Parse .Destination -}}
+{{/* Ignore anchor links to other sections of the same page. */}}
+{{- if not (or $url_struct.IsAbs (strings.HasPrefix $url_struct.String "#")) }}
+  {{- $page_path := strings.TrimPrefix "./" $url_struct.Path -}}
+  {{- with .PageInner.GetPage $page_path }}
+    {{- $page := dict
       "date" ($.Page.Date.UTC.Format "2006-01-02T15:04:05-07:00")
       "linkTitle" $.Page.LinkTitle
-      "permalink" $.Page.Permalink
       "relPermalink" $.Page.RelPermalink
-      "section" $.Page.Section
-      "title" $.Page.Title
-      "type" $.Page.Type
     }}
-    {{- $el := dict "source" $source "target" .RelPermalink }}
-    {{- site.Home.Store.Add "backlinks" (slice $el) }}
+    {{- $backlink := dict "page" $page "links_to" .RelPermalink }}
+    {{- site.Home.Store.Add "backlinks" (slice $backlink) }}
   {{- end }}
 {{- end }}
diff --git a/modules/blox-tailwind/layouts/_default/home.backlinks.json b/modules/blox-tailwind/layouts/_default/home.backlinks.json
index b51db689..e249a154 100644
--- a/modules/blox-tailwind/layouts/_default/home.backlinks.json
+++ b/modules/blox-tailwind/layouts/_default/home.backlinks.json
@@ -1,9 +1,2 @@
-{{- $debug := false }}
-{{- range site.Pages }}
-  {{- $noop := .WordCount }}
-{{- end }}
-{{- if $debug }}
-  {{- jsonify (dict "indent" "  ") (.Store.Get "backlinks") }}
-{{- else }}
-  {{- jsonify (dict "indent" "  ") (dict "comment" "This file is intentionally empty.") }}
-{{- end }}
+{{- /* Hugo 0.126 requires a `home` layout even if it serves no purpose, otherwise shows warning */ -}}
+{{- jsonify dict -}}
diff --git a/modules/blox-tailwind/layouts/partials/components/backlinks.html b/modules/blox-tailwind/layouts/partials/components/backlinks.html
index 945d49de..3ff15dc2 100644
--- a/modules/blox-tailwind/layouts/partials/components/backlinks.html
+++ b/modules/blox-tailwind/layouts/partials/components/backlinks.html
@@ -1,20 +1,19 @@
 {{ $show_backlinks := .Params.backlinks | default true }}
 {{ if $show_backlinks }}
-  {{- $debug := false }}
-  {{- $backlinks := site.Home.Store.Get "backlinks" | uniq  }}
-  {{- with (where $backlinks "target" .RelPermalink) }}
+  {{ $backlinks := site.Home.Store.Get "backlinks" | uniq }}
+  {{ with (where $backlinks "links_to" .RelPermalink) }}
   <div class="backlinks">
     <div class="mb-1 font-semibold tracking-tight">
-      {{ or (T "backlinks") "Backlinks" }}
+      {{ (T "backlinks") | default "Backlinks" }}
     </div>
     <ul>
-      {{- range (sort . "source.linkTitle" "asc") }}
-      <li><a href="{{ .source.relPermalink }}" class="backlink">{{ .source.linkTitle }}</a></li>
-      {{- end }}
+      {{ range (sort . "page.date" "desc") }}
+      {{ $page := .page }}
+      <li>
+        <a href="{{ $page.relPermalink }}" class="backlink">{{ $page.linkTitle }}</a>
+      </li>
+      {{ end }}
     </ul>
   </div>
-  {{- end }}
-  {{- if $debug }}
-  <pre>{{ jsonify (dict "indent" "  ") $backlinks }}</pre>
-  {{- end }}
+  {{ end }}
 {{ end }}