From d6dc2a7bbeacbd1774ca38699649308062517fe9 Mon Sep 17 00:00:00 2001
From: Roozen <93673944+Roozenlz@users.noreply.github.com>
Date: Mon, 18 Dec 2023 13:22:14 +0800
Subject: [PATCH] Support getting parent category by child name in theme
 (#5002)
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#### What type of PR is this?

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#### What this PR does / why we need it:
add getParentByName method to CategoryFinder interface

#### Which issue(s) this PR fixes:
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Fixes #

#### Special notes for your reviewer:
${categoryFinder.getParentByName(anyChild.metadata.name)}
#### Does this PR introduce a user-facing change?

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---
 .../halo/app/theme/finders/CategoryFinder.java  |  2 ++
 .../theme/finders/impl/CategoryFinderImpl.java  | 17 +++++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/application/src/main/java/run/halo/app/theme/finders/CategoryFinder.java b/application/src/main/java/run/halo/app/theme/finders/CategoryFinder.java
index 9f95646a5..f8023fb6c 100644
--- a/application/src/main/java/run/halo/app/theme/finders/CategoryFinder.java
+++ b/application/src/main/java/run/halo/app/theme/finders/CategoryFinder.java
@@ -28,4 +28,6 @@ public interface CategoryFinder {
     Flux<CategoryTreeVo> listAsTree();
 
     Flux<CategoryTreeVo> listAsTree(String name);
+
+    Mono<CategoryVo> getParentByName(String name);
 }
diff --git a/application/src/main/java/run/halo/app/theme/finders/impl/CategoryFinderImpl.java b/application/src/main/java/run/halo/app/theme/finders/impl/CategoryFinderImpl.java
index 07a89f9c2..43502d798 100644
--- a/application/src/main/java/run/halo/app/theme/finders/impl/CategoryFinderImpl.java
+++ b/application/src/main/java/run/halo/app/theme/finders/impl/CategoryFinderImpl.java
@@ -81,6 +81,23 @@ public class CategoryFinderImpl implements CategoryFinder {
         return this.toCategoryTreeVoFlux(name);
     }
 
+    @Override
+    public Mono<CategoryVo> getParentByName(String name) {
+        if (StringUtils.isBlank(name)) {
+            return Mono.empty();
+        }
+        return client.list(Category.class,
+                category -> {
+                    List<String> children = category.getSpec().getChildren();
+                    if (children == null) {
+                        return false;
+                    }
+                    return children.contains(name);
+                },
+                defaultComparator())
+            .next().map(CategoryVo::from);
+    }
+
     Flux<CategoryTreeVo> toCategoryTreeVoFlux(String name) {
         return listAll()
             .collectList()