update point tier rule

src/utils/eventValue.ts

@@ -0,0 +1,76 @@
+import type { EventItem } from "@/types/EventItem";
+
+/**
+ * 返回事件数值单位的前端文案。
+ * 后端仍使用 CENT 表示金额分，前端统一按元展示和录入。
+ */
+export function getEventValueUnitText(valueUnit?: EventItem["valueUnit"]): string {
+	if (valueUnit === "CENT") {
+		return "元";
+	}
+	if (valueUnit === "COUNT") {
+		return "次";
+	}
+	return "未配置单位";
+}
+
+/**
+ * 获取事件数值输入提示。
+ */
+export function getEventNumberValuePlaceholder(event: EventItem): string {
+	if (event.valueUnit === "CENT") {
+		return event.requireValue ? "请输入金额（元），最多两位小数" : "请输入金额（元），可留空，最多两位小数";
+	}
+	return event.requireValue ? "请输入次数，必须是大于等于 0 的整数" : "请输入次数，可留空，必须是大于等于 0 的整数";
+}
+
+/**
+ * 将前端输入的事件数值转换为后端要求的整数。
+ * 金额使用字符串拆分后转换为分，避免直接使用浮点数放大导致精度误差。
+ */
+export function resolveEventNumberValue(event: EventItem, valueText: string): number | undefined {
+	const normalizedValue = valueText.trim();
+	if (!normalizedValue) {
+		return undefined;
+	}
+	if (event.valueUnit === "CENT") {
+		return resolveCentValue(normalizedValue);
+	}
+	if (!/^\d+$/.test(normalizedValue)) {
+		return undefined;
+	}
+	const value = Number(normalizedValue);
+	return Number.isSafeInteger(value) ? value : undefined;
+}
+
+/**
+ * 将后端返回的整数分转换为前端金额文案。
+ */
+export function formatEventNumberValue(event: EventItem | undefined, value?: number | null): string {
+	if (value === undefined || value === null) {
+		return "-";
+	}
+	if (event?.valueUnit !== "CENT") {
+		return `${value}${event?.valueUnit === "COUNT" ? " 次" : ""}`;
+	}
+
+	const centText = String(Math.trunc(value));
+	const yuanText = centText.length < 3 ? "0" : centText.slice(0, -2);
+	const decimalText = centText.slice(-2).padStart(2, "0").replace(/0+$/, "");
+	return `${yuanText}${decimalText ? `.${decimalText}` : ""} 元`;
+}
+
+function resolveCentValue(valueText: string): number | undefined {
+	const match = /^(\d+)(?:\.(\d{0,2}))?$/.exec(valueText);
+	if (!match) {
+		return undefined;
+	}
+
+	const integerText = match[1];
+	const decimalText = (match[2] || "").padEnd(2, "0");
+	const centValue = BigInt(integerText) * 100n + BigInt(decimalText || "0");
+	if (centValue > BigInt(Number.MAX_SAFE_INTEGER)) {
+		return undefined;
+	}
+	return Number(centValue);
+}

src/utils/pointRule.ts

@@ -0,0 +1,29 @@
+import type { PointRuleTierForm } from "@/types/Point";
+
+export function resolveNonNegativeInteger(value: string): number | undefined {
+	if (!value.trim()) {
+		return undefined;
+	}
+	const numberValue = Number(value);
+	return Number.isSafeInteger(numberValue) && !(numberValue < 0) ? numberValue : undefined;
+}
+
+export function getTierMinValue(tierList: PointRuleTierForm[], index: number): number | undefined {
+	if (index === 0) {
+		return 0;
+	}
+	const previousMax = resolveNonNegativeInteger(tierList[index - 1]?.maxText || "");
+	if (previousMax === undefined || !Number.isSafeInteger(previousMax + 1)) {
+		return undefined;
+	}
+	return previousMax + 1;
+}
+
+export function getTierMinText(tierList: PointRuleTierForm[], index: number): string {
+	const min = getTierMinValue(tierList, index);
+	return min === undefined ? "待填写" : String(min);
+}
+
+export function isLastTier(tierList: PointRuleTierForm[], index: number): boolean {
+	return index === tierList.length - 1;
+}