Added router priority to webui's list and detail page

pkg/muxer/http/mux_test.go

@@ -376,6 +376,10 @@ func Test_addRoutePriority(t *testing.T) {
 					w.Header().Set("X-From", route.xFrom)
 				})
 
+				if route.priority == 0 {
+					route.priority = GetRulePriority(route.rule)
+				}
+
 				err := muxer.AddRoute(route.rule, route.priority, handler)
 				require.NoError(t, err, route.rule)
 			}
@@ -517,3 +521,26 @@ func TestEmptyHost(t *testing.T) {
 		})
 	}
 }
+
+func TestGetRulePriority(t *testing.T) {
+	testCases := []struct {
+		desc     string
+		rule     string
+		expected int
+	}{
+		{
+			desc:     "simple rule",
+			rule:     "Host(`example.org`)",
+			expected: 19,
+		},
+	}
+
+	for _, test := range testCases {
+		test := test
+		t.Run(test.desc, func(t *testing.T) {
+			t.Parallel()
+
+			assert.Equal(t, test.expected, GetRulePriority(test.rule))
+		})
+	}
+}