风向计算方法封装

weather-data-ui/src/utils/windDirection.ts

@@ -0,0 +1,22 @@
+/**
+ * 风向角度 -> 风向代码（N/NE/E/SE/S/SW/W/NW）
+ */
+export function windDirectionCode(deg: number | null | string): string | null {
+  if (deg == null || deg === "" || isNaN(Number(deg))) return null;
+  const d = Number(deg);
+  if (d < 0 || d > 360) return null;
+  return ["N", "NE", "E", "SE", "S", "SW", "W", "NW"][Math.floor((d + 22.5) / 45) % 8];
+}
+
+/**
+ * 风向角度 -> 风向中文标签（通过字典 wind_direction_type 映射）
+ * @param deg 风向角度
+ * @param dicts 字典列表
+ */
+export function windDirectionLabel(deg: number | null | string, dicts: any[]): string {
+  const code = windDirectionCode(deg);
+  if (!code) return "—"; // em dash
+  const type = dicts.find((d: any) => d.dictType === "wind_direction_type");
+  const entry = type?.dataList?.find((e: any) => e.dictValue === code);
+  return entry?.dictLabel || code;
+}