first commit

app/lib/purchase-limit-state.js

@@ -0,0 +1,48 @@
+import { ref } from "vue";
+function t(t) {
+  let n = ref(!1),
+    r = ref(!1),
+    i = ref(!1),
+    a = ref(``),
+    o = 0;
+  function s() {
+    (o++, (n.value = !1), (r.value = !1), (i.value = !1), (a.value = ``));
+  }
+  async function c(e) {
+    let s = ++o;
+    ((n.value = !0), (r.value = !1), (i.value = !1), (a.value = ``));
+    try {
+      let n = await t(e);
+      if (s !== o) return;
+      if (
+        !n ||
+        typeof n != `object` ||
+        !(`allowed` in n) ||
+        typeof n.allowed != `boolean` ||
+        !(`message` in n) ||
+        typeof n.message != `string`
+      )
+        throw Error(`限购检查暂时不可用，请重试`);
+      ((i.value = n.allowed),
+        (a.value = n.allowed
+          ? ``
+          : n.message || `此商品已达到购买限制，请调整数量后重试`));
+    } catch (e) {
+      s === o &&
+        (a.value =
+          (e instanceof Error ? e.message : ``) ||
+          `限购检查暂时不可用，请重试`);
+    } finally {
+      s === o && ((n.value = !1), (r.value = !0));
+    }
+  }
+  return {
+    pending: n,
+    checked: r,
+    allowed: i,
+    message: a,
+    check: c,
+    reset: s,
+  };
+}
+export { t };