From 95865257a373fe61ec5d1fd1a3716b2f4c249861 Mon Sep 17 00:00:00 2001
From: Maximilian Friedersdorff <max@gwairfelin.com>
Date: Wed, 5 Nov 2025 08:46:22 +0000
Subject: [PATCH] Support listing notes by tag

---
 internal/notes/notes.go       |  9 +++++++++
 internal/notes/views/views.go | 12 ++++++++----
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/internal/notes/notes.go b/internal/notes/notes.go
index c542aad..a11c74f 100644
--- a/internal/notes/notes.go
+++ b/internal/notes/notes.go
@@ -398,3 +398,12 @@ func (n *Note) ToggleBox(nthBox int) {
 	n.Body = buf.Bytes()
 	n.Save()
 }
+
+func (n *Note) HasTag(tag string) bool {
+	for _, tag_ := range n.Tags {
+		if tag_ == tag {
+			return true
+		}
+	}
+	return false
+}
diff --git a/internal/notes/views/views.go b/internal/notes/views/views.go
index 8452840..5884d18 100644
--- a/internal/notes/views/views.go
+++ b/internal/notes/views/views.go
@@ -199,6 +199,8 @@ type titleAndURL struct {
 func list(w http.ResponseWriter, r *http.Request) {
 	user := r.Context().Value(middleware.ContextKey("user")).(string)
 
+	tag := r.FormValue("tag")
+
 	titlesAndUrls := make([]titleAndURL, 0)
 
 	ns := notes.Notes.Get(user)
@@ -206,10 +208,12 @@ func list(w http.ResponseWriter, r *http.Request) {
 	log.Printf("Notes for %s: %+v", user, ns)
 
 	for note := range ns {
-		titlesAndUrls = append(
-			titlesAndUrls,
-			titleAndURL{Title: note.Title, URL: myurls.Reverse("view", urls.Repl{"note": note.Uid})},
-		)
+		if tag == "" || note.HasTag(tag) {
+			titlesAndUrls = append(
+				titlesAndUrls,
+				titleAndURL{Title: note.Title, URL: myurls.Reverse("view", urls.Repl{"note": note.Uid})},
+			)
+		}
 	}
 
 	urlNew := myurls.Reverse("new", urls.Repl{})