mall-front-app/sheep/components/s-select-sku/s-select-sku.vue

<template>
	<!-- 规格弹窗 -->
	<su-popup :show="show" round="10" @close="emits('close')">
		<!-- SKU 信息 -->
		<view class="ss-modal-box bg-white ss-flex-col">
			<view class="modal-header ss-flex ss-col-center">
				<view class="header-left ss-m-r-30">
					<image
						class="sku-image"
						:src="state.selectedSku.picUrl || goodsInfo.picUrl"
						mode="aspectFill"
					/>
				</view>
				<view class="header-right ss-flex-col ss-row-between ss-flex-1">
					<view class="goods-title ss-line-2">{{ goodsInfo.name }}</view>
					<view class="header-right-bottom ss-flex ss-col-center ss-row-between">
						<view class="ss-flex">
							<view class="price-text">
								<image
									src="@/static/icon/points.png"
									v-if="goodsInfo.spuPayType == 2"
									style="width: 30rpx; height: 30rpx"
								></image>
								<text v-else>￥</text>
								{{ fen2yuan(state.selectedSku.price || goodsInfo.price) }}
							</view>
							<view
								class="origin-price-text ss-m-l-10"
								v-if="
									state.selectedSku.promotionFee >= 0 ||
									goodsInfo.promotionFee >= 0
								"
							>
								数字权益:{{
									fen2yuan(
										state.selectedSku.promotionFee || goodsInfo.promotionFee,
									)
								}}
							</view>
						</view>
						<view class="stock-text ss-m-l-20">
							{{ formatStock('exact', state.selectedSku.stock || goodsInfo.stock) }}
						</view>
					</view>
				</view>
			</view>

			<!-- 属性选择 -->
			<view class="modal-content ss-flex-1">
				<scroll-view scroll-y="true" class="modal-content-scroll" @touchmove.stop>
					<view
						class="sku-item ss-m-b-20"
						v-for="property in propertyList"
						:key="property.id"
					>
						<view class="label-text ss-m-b-20">{{ property.name }}</view>
						<view class="ss-flex ss-col-center ss-flex-wrap">
							<button
								class="ss-reset-button spec-btn"
								v-for="value in property.values"
								:class="[
									{
										'ui-BG-Main-Gradient':
											state.currentPropertyArray[property.id] === value.id,
									},
									{
										'disabled-btn': value.disabled === true,
									},
								]"
								:key="value.id"
								:disabled="value.disabled === true"
								@tap="onSelectSku(property.id, value.id)"
							>
								{{ value.name }}
							</button>
						</view>
					</view>
					<view
						class="buy-num-box ss-flex ss-col-center ss-row-between ss-m-b-40"
						v-if="goodsInfo.spuPayType == 2"
					>
						<view class="label-text"
							>购买金额 (当前可用数字权益:{{
								points2point(userWallet.integralDO.currentQuota)
							}})</view
						>
						<view class="ss-flex ss-col-center">
							<image
								src="@/static/icon/points.png"
								v-if="goodsInfo.spuPayType == 2"
								style="width: 30rpx; height: 30rpx"
							></image>
							
							<input
								v-model="state.selectedSku.use_points"
								class="uni-input input-points"
								style="width: 100rpx; text-align: center"
								type="number"
								placeholder="0"
								@input="inputPoints"
								:disabled="!state.selectedSku.id"
							/>
						</view>
					</view>
					<view class="buy-num-box ss-flex ss-col-center ss-row-between ss-m-b-40" v-else>
						<view class="label-text">购买数量</view>
						<su-number-box
							:min="1"
							:max="state.selectedSku.stock"
							:step="1"
							v-model="state.selectedSku.goods_num"
							@change="onNumberChange($event)"
						/>
					</view>
				</scroll-view>
			</view>
			<!-- 操作区 -->
			<view class="modal-footer border-top">
				<view
					class="buy-box ss-flex ss-col-center ss-flex ss-col-center ss-row-center"
					v-if="goodsInfo.spuType && goodsInfo.spuPayType == 1"
				>
					<button class="ss-reset-button add-btn ui-Shadow-Main" @tap="onAddCart"
						>加入购物车</button
					>
					<button class="ss-reset-button buy-btn ui-Shadow-Main" @tap="onBuy"
						>立即购买</button
					>
				</view>
				<view
					class="buy-box ss-flex ss-col-center ss-flex ss-col-center ss-row-center"
					v-else
				>
					<button class="ss-reset-button one-buy-btn ui-Shadow-Main" @tap="onBuy"
						>立即购买</button
					>
				</view>
			</view>
		</view>
	</su-popup>
</template>

<script setup>
	import { computed, reactive, watch, onMounted,nextTick } from 'vue';
	import sheep from '@/sheep';
	import {
		formatStock,
		convertProductPropertyList,
		fen2yuan,
		points2point,
		
	} from '@/sheep/hooks/useGoods';

	const emits = defineEmits(['change', 'addCart', 'buy', 'close']);
	const props = defineProps({
		goodsInfo: {
			type: Object,
			default() {},
		},
		show: {
			type: Boolean,
			default: false,
		},
	});
	const userWallet = computed(() => sheep.$store('user').userWallet);
	const state = reactive({
		selectedSku: {}, // 选中的 SKU
		currentPropertyArray: [], // 当前选中的属性，实际是个 Map。key 是 property 编号，value 是 value 编号
	});

	const propertyList = convertProductPropertyList(props.goodsInfo.skus);

	// SKU 列表
	const skuList = computed(() => {
		let skuPrices = props.goodsInfo.skus;
		for (let price of skuPrices) {
			price.value_id_array = price.properties.map((item) => item.valueId);
		}
		return skuPrices;
	});
	function inputPoints(e) {
		const points = e.detail.value;
		const userCanUsePoints = parseFloat(points2point(userWallet.value.integralDO.currentQuota));
		state.selectedSku.goods_num = parseInt(state.selectedSku.use_points / fen2yuan(state.selectedSku.price));
		
		if (points > userCanUsePoints) {
			sheep.$helper.toast('可用数字权益不足');
			console.log('输入的数字权益大于可用数字权益了', points, userCanUsePoints);
			nextTick(() => {
				state.selectedSku.use_points = userCanUsePoints;
				// 重新计算 对应的商品数量
				state.selectedSku.goods_num = parseInt(state.selectedSku.use_points / fen2yuan(state.selectedSku.price));

			});
		}
		
	}
	watch(
		() => state.selectedSku,
		(newVal) => {
			emits('change', newVal);
		},
		{
			immediate: true, // 立即执行
			deep: true, // 深度监听
		},
	);

	// 输入框改变数量
	function onNumberChange(e) {
		if (e === 0) return;
		if (state.selectedSku.goods_num === e) return;
		state.selectedSku.goods_num = e;
	}

	// 加入购物车
	function onAddCart() {
		if (state.selectedSku.id <= 0) {
			sheep.$helper.toast('请选择规格');
			return;
		}
		if (state.selectedSku.stock <= 0) {
			sheep.$helper.toast('库存不足');
			return;
		}

		emits('addCart', state.selectedSku);
	}

	// 立即购买
	function onBuy() {
		if (props.goodsInfo.spuPayType == 2) {
			if (state.selectedSku.goods_num < 1 || !state.selectedSku.use_points) {
				sheep.$helper.toast('输入金额少于可购买数量');
				return;
			}
			// 下单时检测如果
			if(state.selectedSku.goods_num  > state.selectedSku.stock){
				state.selectedSku.use_points = (state.selectedSku.stock * fen2yuan(state.selectedSku.price) ).toFixed(2)
				state.selectedSku.goods_num = state.selectedSku.stock
			}
		}
		if (state.selectedSku.id <= 0) {
			sheep.$helper.toast('请选择规格');
			return;
		}
		if (state.selectedSku.stock <= 0) {
			sheep.$helper.toast('库存不足');
			return;
		}
		
		emits('buy', state.selectedSku);
	}

	// 改变禁用状态：计算每个 property 属性值的按钮，是否禁用
	function changeDisabled(isChecked = false, propertyId = 0, valueId = 0) {
		let newSkus = []; // 所有可以选择的 sku 数组
		if (isChecked) {
			// 情况一：选中 property
			// 获得当前点击选中 property 的、所有可用 SKU
			for (let price of skuList.value) {
				if (price.stock <= 0) {
					continue;
				}
				if (price.value_id_array.indexOf(valueId) >= 0) {
					newSkus.push(price);
				}
			}
		} else {
			// 情况二：取消选中 property
			// 当前所选 property 下，所有可以选择的 SKU
			newSkus = getCanUseSkuList();
		}

		// 所有存在并且有库存未选择的 SKU 的 value 属性值 id
		let noChooseValueIds = [];
		for (let price of newSkus) {
			noChooseValueIds = noChooseValueIds.concat(price.value_id_array);
		}
		noChooseValueIds = Array.from(new Set(noChooseValueIds)); // 去重

		if (isChecked) {
			// 去除当前选中的 value 属性值 id
			let index = noChooseValueIds.indexOf(valueId);
			noChooseValueIds.splice(index, 1);
		} else {
			// 循环去除当前已选择的 value 属性值 id
			state.currentPropertyArray.forEach((currentPropertyId) => {
				if (currentPropertyId.toString() !== '') {
					return;
				}
				// currentPropertyId 为空是反选 填充的
				let index = noChooseValueIds.indexOf(currentPropertyId);
				if (index >= 0) {
					// currentPropertyId 存在于 noChooseValueIds
					noChooseValueIds.splice(index, 1);
				}
			});
		}

		// 当前已选择的 property 数组
		let choosePropertyIds = [];
		if (!isChecked) {
			// 当前已选择的 property
			state.currentPropertyArray.forEach((currentPropertyId, currentValueId) => {
				if (currentPropertyId !== '') {
					// currentPropertyId 为空是反选 填充的
					choosePropertyIds.push(currentValueId);
				}
			});
		} else {
			// 当前点击选择的 property
			choosePropertyIds = [propertyId];
		}

		for (let propertyIndex in propertyList) {
			// 当前点击的 property、或者取消选择时候，已选中的 property 不进行处理
			if (choosePropertyIds.indexOf(propertyList[propertyIndex]['id']) >= 0) {
				continue;
			}
			// 如果当前 property id 不存在于有库存的 SKU 中，则禁用
			for (let valueIndex in propertyList[propertyIndex]['values']) {
				propertyList[propertyIndex]['values'][valueIndex]['disabled'] =
					noChooseValueIds.indexOf(
						propertyList[propertyIndex]['values'][valueIndex]['id'],
					) < 0; // true 禁用 or false 不禁用
			}
		}
	}

	// 当前所选属性下，获取所有有库存的 SKU 们
	function getCanUseSkuList() {
		let newSkus = [];
		for (let sku of skuList.value) {
			if (sku.stock <= 0) {
				continue;
			}
			let isOk = true;
			state.currentPropertyArray.forEach((propertyId) => {
				// propertyId 不为空，并且，这个 条 sku 没有被选中，则排除
				if (propertyId.toString() !== '' && sku.value_id_array.indexOf(propertyId) < 0) {
					isOk = false;
				}
			});
			if (isOk) {
				newSkus.push(sku);
			}
		}

		return newSkus;
	}

	// 选择规格
	function onSelectSku(propertyId, valueId) {
		// console.log(propertyId,valueId)
		// 清空已输入金额
		state.selectedSku.use_points = 0;
		// 清空已选择
		let isChecked = true; // 选中 or 取消选中
		if (
			state.currentPropertyArray[propertyId] !== undefined &&
			state.currentPropertyArray[propertyId] === valueId
		) {
			// 点击已被选中的，删除并填充 ''
			isChecked = false;
			state.currentPropertyArray.splice(propertyId, 1, '');
		} else {
			// 选中
			state.currentPropertyArray[propertyId] = valueId;
		}

		// 选中的 property 大类
		let choosePropertyId = [];
		state.currentPropertyArray.forEach((currentPropertyId) => {
			if (currentPropertyId !== '') {
				// currentPropertyId 为空是反选 填充的
				choosePropertyId.push(currentPropertyId);
			}
		});

		// 当前所选 property 下，所有可以选择的 SKU 们
		let newSkuList = getCanUseSkuList();

		// 判断所有 property 大类是否选择完成
		if (choosePropertyId.length === propertyList.length && newSkuList.length) {
			newSkuList[0].goods_num = state.selectedSku.goods_num || 1;
			state.selectedSku = newSkuList[0];
		} else {
			state.selectedSku = {};
		}

		// 改变 property 禁用状态
		changeDisabled(isChecked, propertyId, valueId);
	}

	changeDisabled(false);

	onMounted(() => {
		// 如果商品的属性只有一条，则默认选中
		if (propertyList.length == 1 && propertyList[0].values.length == 1) {
			onSelectSku(0, 0);
		}
		// 这里可以处理其他初始化逻辑，但请注意这不会接收到 onLoad 的 options 参数
	});

	// TODO 非繁人：待讨论的优化点：1）单规格，要不要默认选中；2）默认要不要选中第一个规格
</script>

<style lang="scss" scoped>
	.origin-price-text {
		font-size: 22rpx;
		font-weight: 400;
		color: $gray-c;
		font-family: OPPOSANS;
		background: #ffca3e;
		padding: 2px 8px;
		border-radius: 4px;
		display: inline-block;
		color: #597533;
	}

	// 购买
	.buy-box {
		padding: 10rpx 0;

		.add-btn {
			width: 356rpx;
			height: 80rpx;
			border-radius: 40rpx 0 0 40rpx;
			background-color: var(--ui-BG-Main-light);
			color: var(--ui-BG-Main);
		}

		.buy-btn {
			width: 356rpx;
			height: 80rpx;
			border-radius: 0 40rpx 40rpx 0;
			background: linear-gradient(90deg, var(--ui-BG-Main), var(--ui-BG-Main-gradient));
			color: #fff;
		}

		.one-buy-btn {
			width: 98%;
			height: 80rpx;
			border-radius: 40rpx;
			background: linear-gradient(90deg, var(--ui-BG-Main), var(--ui-BG-Main-gradient));
			color: #fff;
		}

		.score-btn {
			width: 100%;
			margin: 0 20rpx;
			height: 80rpx;
			border-radius: 40rpx;
			background: linear-gradient(90deg, var(--ui-BG-Main), var(--ui-BG-Main-gradient));
			color: #fff;
		}
	}

	.ss-modal-box {
		border-radius: 30rpx 30rpx 0 0;
		max-height: 1000rpx;

		.modal-header {
			position: relative;
			padding: 80rpx 20rpx 40rpx;

			.sku-image {
				width: 160rpx;
				height: 160rpx;
				border-radius: 10rpx;
			}

			.header-right {
				height: 160rpx;
			}

			.close-icon {
				position: absolute;
				top: 10rpx;
				right: 20rpx;
				font-size: 46rpx;
				opacity: 0.2;
			}

			.goods-title {
				font-size: 28rpx;
				font-weight: 500;
				line-height: 42rpx;
			}

			.score-img {
				width: 36rpx;
				height: 36rpx;
				margin: 0 4rpx;
			}

			.score-text {
				font-size: 30rpx;
				font-weight: 500;
				color: $red;
				font-family: OPPOSANS;
			}

			.price-text {
				font-size: 30rpx;
				font-weight: 500;
				color: $red;
				font-family: OPPOSANS;

				&::before {
					// content: '￥';
					// font-size: 30rpx;
					// font-weight: 500;
					// color: $red;
				}
			}

			.stock-text {
				font-size: 26rpx;
				color: #999999;
			}
		}

		.modal-content {
			padding: 0 20rpx;

			.modal-content-scroll {
				max-height: 600rpx;

				.label-text {
					font-size: 26rpx;
					font-weight: 500;
				}

				.buy-num-box {
					height: 100rpx;
				}

				.spec-btn {
					height: 60rpx;
					min-width: 100rpx;
					padding: 0 30rpx;
					background: #f4f4f4;
					border-radius: 30rpx;
					color: #434343;
					font-size: 26rpx;
					margin-right: 10rpx;
					margin-bottom: 10rpx;
				}

				.disabled-btn {
					font-weight: 400;
					color: #c6c6c6;
					background: #f8f8f8;
				}
			}
		}
	}
</style>