From d1497369463b43f95c9a7fd5622f1e7597ae6e68 Mon Sep 17 00:00:00 2001
From: Felix Martin <mail@felixm.de>
Date: Tue, 2 Jun 2026 12:33:23 -0400
Subject: [PATCH] Share unavailable() so the Windows sensor logs unavailable
 transitions

---
 internal/evidence/unavailable.go | 10 ++++++++++
 internal/evidence/windows.go     |  2 +-
 internal/evidence/x11.go         |  5 -----
 3 files changed, 11 insertions(+), 6 deletions(-)
 create mode 100644 internal/evidence/unavailable.go

diff --git a/internal/evidence/unavailable.go b/internal/evidence/unavailable.go
new file mode 100644
index 0000000..927804e
--- /dev/null
+++ b/internal/evidence/unavailable.go
@@ -0,0 +1,10 @@
+package evidence
+
+import "log"
+
+// unavailable builds an Unavailable snapshot and logs the reason. It is shared
+// by every platform sensor so an unobservable window is recorded consistently.
+func unavailable(reason string) WindowSnapshot {
+	log.Printf("evidence: %s", reason)
+	return WindowSnapshot{Health: EvidenceHealth{Available: false, Reason: reason}}
+}
diff --git a/internal/evidence/windows.go b/internal/evidence/windows.go
index 79aae4f..8f597b1 100644
--- a/internal/evidence/windows.go
+++ b/internal/evidence/windows.go
@@ -31,7 +31,7 @@ func (windowsSource) Watch(ctx context.Context, onChange func(WindowSnapshot)) {
 			return
 		}
 		if !ok {
-			onChange(WindowSnapshot{Health: EvidenceHealth{Available: false, Reason: "no foreground window"}})
+			onChange(unavailable("no foreground window"))
 			return
 		}
 		onChange(WindowSnapshot{Title: title, Class: class, Health: EvidenceHealth{Available: true}})
diff --git a/internal/evidence/x11.go b/internal/evidence/x11.go
index 7c972e0..cbf1ace 100644
--- a/internal/evidence/x11.go
+++ b/internal/evidence/x11.go
@@ -4,7 +4,6 @@ package evidence
 
 import (
 	"context"
-	"log"
 
 	"github.com/jezek/xgb/xproto"
 	"github.com/jezek/xgbutil"
@@ -88,7 +87,3 @@ func snapshot(X *xgbutil.XUtil) WindowSnapshot {
 	}
 }
 
-func unavailable(reason string) WindowSnapshot {
-	log.Printf("evidence: %s", reason)
-	return WindowSnapshot{Health: EvidenceHealth{Available: false, Reason: reason}}
-}