From 9a0f0809621af1bf9d00131908d72bb1f46888cd Mon Sep 17 00:00:00 2001
From: David Eisinger <david.eisinger@gmail.com>
Date: Fri, 2 Jun 2023 23:53:47 -0400
Subject: [PATCH] Add backlinks to journal + notes

---
 themes/v2/layouts/journal/single.html     |  1 +
 themes/v2/layouts/notes/single.html       |  1 +
 themes/v2/layouts/partials/backlinks.html | 27 +++++++++++++++++++++++
 3 files changed, 29 insertions(+)
 create mode 100644 themes/v2/layouts/partials/backlinks.html

diff --git a/themes/v2/layouts/journal/single.html b/themes/v2/layouts/journal/single.html
index 61d2334..7694593 100644
--- a/themes/v2/layouts/journal/single.html
+++ b/themes/v2/layouts/journal/single.html
@@ -18,4 +18,5 @@
   {{ .Content }}
 
   {{- partial "references.html" . -}}
+  {{- partial "backlinks.html" . -}}
 {{ end }}
diff --git a/themes/v2/layouts/notes/single.html b/themes/v2/layouts/notes/single.html
index 303c5b7..0e14d4d 100644
--- a/themes/v2/layouts/notes/single.html
+++ b/themes/v2/layouts/notes/single.html
@@ -6,4 +6,5 @@
   {{ .Content }}
 
   {{- partial "references.html" . -}}
+  {{- partial "backlinks.html" . -}}
 {{ end }}
diff --git a/themes/v2/layouts/partials/backlinks.html b/themes/v2/layouts/partials/backlinks.html
new file mode 100644
index 0000000..cefe49b
--- /dev/null
+++ b/themes/v2/layouts/partials/backlinks.html
@@ -0,0 +1,27 @@
+{{ $currlink := .RelPermalink }}
+{{ $noslash := substr .RelPermalink 0 -1 }}
+{{ $backlinks := slice }}
+
+{{ range .Site.Pages }}
+  {{ $found := findRE $noslash .Content 1 }}
+
+  {{ if and ($found) (ne $currlink .RelPermalink) }}
+    {{ $backlinks = $backlinks | append . }}
+  {{ end }}
+{{ end }}
+
+{{ with $backlinks }}
+  <hr>
+
+  <div class="references">
+    <h3>Backlinks</h3>
+
+    <ul>
+      {{ range . }}
+        <li>
+          <a href="{{ .RelPermalink }}">{{ .Title }}</a>
+        </li>
+      {{ end }}
+    </ul>
+  </div>
+{{ end }}