From 7729d0a1328463baf87517b3516f82aa173df954 Mon Sep 17 00:00:00 2001
From: Helmut Merz <helmutm@cy55.de>
Date: Sat, 8 Jan 2022 11:33:13 +0100
Subject: [PATCH] show backlinks to ilink shortcodes (if showBacklinks site
 param is set

---
 i18n/de.yaml                    | 5 ++++-
 i18n/en.yaml                    | 5 ++++-
 layouts/partials/list-item.html | 8 ++++++--
 layouts/partials/sidebar.html   | 6 ++++++
 layouts/shortcodes/ilink.html   | 9 ++++-----
 5 files changed, 24 insertions(+), 9 deletions(-)

diff --git a/i18n/de.yaml b/i18n/de.yaml
index f9d4ffc..0b9a1c3 100644
--- a/i18n/de.yaml
+++ b/i18n/de.yaml
@@ -1,5 +1,5 @@
 #
-# de.yaml 2022-01-06
+# de.yaml 2022-01-08
 #
 
 about:
@@ -20,6 +20,9 @@ articles-in-section:
 author:
   other: Autor
 
+backlinks:
+  other: Verlinkte Seiten
+
 child-articles:
   other: Untergeordnete Artikel
 
diff --git a/i18n/en.yaml b/i18n/en.yaml
index 3796bb7..aaf1cf0 100644
--- a/i18n/en.yaml
+++ b/i18n/en.yaml
@@ -1,5 +1,5 @@
 #
-# en.yaml 2022-01-06
+# en.yaml 2022-01-08
 #
 
 about:
@@ -20,6 +20,9 @@ articles-in-section:
 author:
   other: Author
 
+backlinks:
+  other: Backlinks
+
 child-articles:
   other: Child Articles
 
diff --git a/layouts/partials/list-item.html b/layouts/partials/list-item.html
index 56a0edb..785407c 100644
--- a/layouts/partials/list-item.html
+++ b/layouts/partials/list-item.html
@@ -1,6 +1,10 @@
-{{ range . -}}
+{{ range $idx, $page := . -}}
 <li>
-  <a href="{{ .Permalink }}"
+  {{- $url := .Permalink -}}
+  {{- if eq (printf "%T" $idx) "string" -}}
+    {{- $url = printf "%s#%v" .Permalink $idx -}}
+  {{- end -}}
+  <a href="{{ $url }}"
      class="text-decoration-none">{{ .Title }}&nbsp;&nbsp;
     {{ if .Date -}}
     <small>{{ .Date.Format (i18n "dateFormat") }}</small>
diff --git a/layouts/partials/sidebar.html b/layouts/partials/sidebar.html
index 8111850..13a5fb8 100644
--- a/layouts/partials/sidebar.html
+++ b/layouts/partials/sidebar.html
@@ -69,6 +69,12 @@
             (dict "related" $related "header" $header "id" "articles-in-section") -}}
     {{- end }}
 
+    {{ if .Site.Params.showBacklinks -}}
+      {{- $related := .Scratch.Get "backlinks" -}}
+      {{- partial "card-related" 
+          (dict "related" $related "header" (i18n "backlinks") "id" "backlinks") -}}
+    {{- end }}
+
     {{ if .Params.toc -}}
     <div class="card mt-3">
       <div class="card-header">
diff --git a/layouts/shortcodes/ilink.html b/layouts/shortcodes/ilink.html
index abf51ac..a5cc5e0 100644
--- a/layouts/shortcodes/ilink.html
+++ b/layouts/shortcodes/ilink.html
@@ -6,9 +6,8 @@
 {{- $inner := .Inner -}}
 {{- range $pages -}}
   {{- $url := printf "%s%s%s" .Permalink $fragsep $frag -}}
-  <a id="{{ .Params.pageid }}"
-     anchor="{{ .Params.pageid }}"
-     href="{{ $url }}">{{ or $inner .Title | markdownify }}</a>
-  {{- $backlink := printf "%s#%s" $this.Permalink .Params.pageid -}}
-  {{- .Scratch.Add "backlinks" (slice $this) -}}
+  {{- $text := or $inner .Title -}}
+  <a id="{{ $text | anchorize }}"
+     href="{{ $url }}">{{ $text | markdownify }}</a>
+  {{- .Scratch.SetInMap "backlinks" (anchorize $text) $this -}}
 {{- end -}}