From 2acd380e98e705801eb90e8c6dee4395e4381aa8 Mon Sep 17 00:00:00 2001
From: Jimmy Cai <jimmehcai@gmail.com>
Date: Fri, 11 Sep 2020 17:54:16 +0200
Subject: [PATCH] feat(helper/image): customize field used to get featured
 image

---
 exampleSite/config.toml            |  1 +
 layouts/partials/helper/image.html | 15 ++++++++-------
 2 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/exampleSite/config.toml b/exampleSite/config.toml
index 4ffe263..294742c 100644
--- a/exampleSite/config.toml
+++ b/exampleSite/config.toml
@@ -13,6 +13,7 @@ DefaultContentLanguage = "en"                   # Theme i18n support
 [params]
     mainSections = ["post"]
     favicon = ""
+    featuredImageField = "image"
     [params.dateFormat]
         published = "Jan 02, 2006"
         lastUpdated = "Jan 02, 2006 15:04 MST"
diff --git a/layouts/partials/helper/image.html b/layouts/partials/helper/image.html
index fc9925f..f73e985 100644
--- a/layouts/partials/helper/image.html
+++ b/layouts/partials/helper/image.html
@@ -1,17 +1,18 @@
 {{ $result := dict "exists" false "permalink" nil "resource" nil "isDefault" false }}
-{{ $imageField := .Context.Params.image }}
+{{ $imageField := default "image" .Context.Site.Params.featuredImageField }}
+{{ $imageValue := index .Context.Params $imageField }}
 
-{{ if $imageField }}
+{{ if $imageValue }}
     <!-- If page has `image` field set -->
     {{ $result = merge $result (dict "exists" true) }}
 
-    {{ $url := urls.Parse $imageField }}
+    {{ $url := urls.Parse $imageValue }}
     {{ if or (eq $url.Scheme "http") (eq $url.Scheme "https") }}
         <!-- Is a external image -->
-        {{ $result = merge $result (dict "permalink" $imageField) }}
+        {{ $result = merge $result (dict "permalink" $imageValue) }}
     {{ else }}
-        {{ $pageResourceImage := .Context.Resources.GetMatch (printf "%s" ($imageField | safeURL)) }}
-        {{ $siteResourceImage := resources.GetMatch (printf "%s" ($imageField | safeURL)) }}
+        {{ $pageResourceImage := .Context.Resources.GetMatch (printf "%s" ($imageValue | safeURL)) }}
+        {{ $siteResourceImage := resources.GetMatch (printf "%s" ($imageValue | safeURL)) }}
         
         {{ if $pageResourceImage }}
             <!-- If image is found under page bundle -->
@@ -23,7 +24,7 @@
             {{ $result = merge $result (dict "resource" $siteResourceImage) }}
         {{ else }}
             <!-- Can not find the image -->
-            {{ errorf "Failed loading image: %q" $imageField }}
+            {{ errorf "Failed loading image: %q" $imageValue }}
             {{ $result = merge $result (dict "exists" false) }}
         {{ end }}
     {{ end }}