From f276f4d64a2320f0e2024c1a840a62fbf4613811 Mon Sep 17 00:00:00 2001
From: Matt Baer <matt@write.as>
Date: Sat, 16 Oct 2021 15:27:37 -0400
Subject: [PATCH] Add NewCategoryFromPartial func

---
 category/category.go | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/category/category.go b/category/category.go
index f60dc4b..bc427b1 100644
--- a/category/category.go
+++ b/category/category.go
@@ -28,3 +28,24 @@ func NewCategory(hashtag string) *Category {
 		Title:   title,
 	}
 }
+
+// NewCategoryFromPartial creates a Category from a partially-populated Category, such as when a user initially creates
+// one.
+func NewCategoryFromPartial(cat *Category) *Category {
+	newCat := &Category{
+		Hashtag: cat.Hashtag,
+	}
+	// Create title from hashtag, if none supplied
+	if cat.Title == "" {
+		newCat.Title = titleFromHashtag(cat.Hashtag)
+	} else {
+		newCat.Title = cat.Title
+	}
+	// Create slug from title, if none supplied; otherwise ensure slug is valid
+	if cat.Slug == "" {
+		newCat.Slug = slug.Make(newCat.Title)
+	} else {
+		newCat.Slug = slug.Make(cat.Slug)
+	}
+	return newCat
+}