feat: auto generate thumbnail for video uploaded to telegram storage

storage/telegram/util_test.go

@@ -0,0 +1,34 @@
+package telegram
+
+import (
+	"os"
+	"testing"
+)
+
+func TestExtractThumbFrame(t *testing.T) {
+	file, err := os.Open("tests/testvideo")
+	if err != nil {
+		t.Fatalf("failed to open test video: %v", err)
+	}
+	defer file.Close()
+	thumb, err := extractThumbFrame(file)
+	if err != nil {
+		t.Fatalf("failed to extract thumb frame: %v", err)
+	}
+	os.WriteFile("tests/testthumb.jpg", thumb, 0644)
+}
+
+func TestGetVideoMetadata(t *testing.T) {
+	file, err := os.Open("tests/testvideo")
+	if err != nil {
+		t.Fatalf("failed to open test video: %v", err)
+	}
+	defer file.Close()
+	meta, err := getVideoMetadata(file)
+	if err != nil {
+		t.Fatalf("failed to get video metadata: %v", err)
+	}
+	if meta.Duration == 0 || meta.Width == 0 || meta.Height == 0 {
+		t.Fatalf("invalid video metadata: %+v", meta)
+	}
+}