book-hi/packet/pages/index.vue

<template>
    <view class="packet-page">
        <!-- Background -->
        <image src="/packet/static/index/background.png" class="bg-image" mode="widthFix"></image>

        <!-- Main Content -->
        <view class="content-wrapper">
            <!-- Headline -->
            <image src="/packet/static/index/headline.png" class="headline-image" mode="widthFix"></image>

            <!-- Red Envelope Section -->
            <view class="envelope-section">
                <!-- Red Envelope Image -->
                <image src="/packet/static/index/red_envelope.png" class="envelope-image" mode="widthFix"></image>

                <!-- Amount Display -->
                <view class="amount-wrapper">
                    <view class="amount-display">
                        <text class="currency">¥</text>
                        <text class="amount-value">{{ amount }}</text>
                    </view>
                </view>

                <!-- Receive Button -->
                <view class="receive-btn-wrapper" @click="handleReceive">
                    <image src="/packet/static/index/btn_receive.png" class="btn-image" mode="widthFix"></image>
                    <text class="btn-text" v-if="!redBagData.drawStatus">领{{ amount }}元红包 | 买书卖书都能用</text>
                    <text class="btn-text" v-else>已领取</text>
                </view>
            </view>

            <!-- Info Card -->
            <view class="info-card-section">
                <image src="/packet/static/index/info_frame.png" class="info-frame" mode="widthFix"></image>
                <view class="info-content">
                    <view class="info-list">
                        <view class="info-item">
                            <text>买书立减</text>
                            <text class="spacer"></text>
                            <text>卖书加价</text>
                        </view>
                        <view class="info-item">
                            <text>伴你轻松度过大学四年</text>
                        </view>
                        <view class="info-item">
                            <text>官方补贴</text>
                            <text class="spacer"></text>
                            <text>无门槛使用</text>
                        </view>
                    </view>
                    <view class="rule-footer">
                        <text class="rule-text">活动规则</text>
                    </view>
                </view>
            </view>
        </view>
    </view>
</template>

<script>
import { silentLogin } from '@/api/auth'

export default {
    data() {
        return {
            amount: '1.58',
            bianhao: '', // 红包编号
            redBagData: null // 红包数据
        }
    },
    onLoad(options) {
        let bianhao = options.bianhao;
        
        // 兼容扫码进入场景，当前页的 scene 里带了 bianhao
        if (!bianhao && options.scene) {
            const decodeScene = decodeURIComponent(options.scene);
            const paramPairs = decodeScene.split('&');
            paramPairs.forEach((pair) => {
                const [key, value] = pair.split('=');
                if (key === 'bianhao') {
                    bianhao = value;
                }
            });
        }

        // 兼容从 App.vue 缓存中获取 (因为如果是扫小程序码直接进入这个页面，App.vue的onLaunch会先执行并存入缓存，然后执行页面的onLoad)
        if (!bianhao) {
            bianhao = uni.getStorageSync('scene_bianhao');
        }

        if (bianhao) {
            this.bianhao = bianhao;
            uni.removeStorageSync('scene_bianhao');
            // 调用扫码接口获取红包信息
            this.scanRedBag();
        }
    },
    onShow() {
        // 如果是从其他页面返回，重新获取红包数据
        if (this.bianhao) {
            this.scanRedBag();
        }
    },
    methods: {
        // 请求前确保 token 可用，避免扫码冷启动时出现 401
        async ensureTokenReady() {
            const token = uni.getStorageSync('token')
            if (token) return true
            try {
                await silentLogin()
                return !!uni.getStorageSync('token')
            } catch (e) {
                return false
            }
        },
        // 扫码获取红包信息
        async scanRedBag() {
            if (!this.bianhao) {
                // 如果没有编号，提示用户扫码
                uni.showModal({
                    title: '提示',
                    content: '请扫描红包二维码',
                    showCancel: false
                });
                return;
            }

            const loginReady = await this.ensureTokenReady()
            if (!loginReady) {
                uni.showToast({
                    title: '登录状态失效，请稍后重试',
                    icon: 'none'
                });
                return;
            }

            try {
                const res = await this.$u.api.scanRedBagAjax(this.bianhao);
                if (res.code === 200 || res.code === 0) {
                    this.redBagData = res.data;
                    this.amount = res.data.redPrice;
                } else {
                    uni.showToast({
                        title: res.msg || '获取红包信息失败',
                        icon: 'none'
                    });
                }
            } catch (e) {
                console.error('扫码获取红包信息失败:', e);
                uni.showToast({
                    title: '网络错误',
                    icon: 'none'
                });
            }
        },
        // 领取红包
        async handleReceive() {
            // 如果已领取，提示用户
            if (this.redBagData && this.redBagData.drawStatus === 1) {
                uni.showToast({
                    title: '红包已领取',
                    icon: 'none'
                });
                return;
            }

            if (!this.bianhao) {
                uni.showToast({
                    title: '红包编号缺失',
                    icon: 'none'
                });
                return;
            }

            const loginReady = await this.ensureTokenReady()
            if (!loginReady) {
                uni.showToast({
                    title: '登录状态失效，请稍后重试',
                    icon: 'none'
                });
                return;
            }

            // 显示领取中提示
            uni.showLoading({
                title: '领取中...'
            });

            try {
                const res = await this.$u.api.getRedBagAjax(this.bianhao);
                uni.hideLoading();
                if (res.code === 200) {
                    // 更新红包数据
                    this.redBagData = res.data;
                    uni.showToast({
                        title: '领取成功',
                        icon: 'success'
                    });
                    // 跳转到 get 页面，并传递红包数据
                    setTimeout(() => {
                        uni.redirectTo({
                            url: '/packet/pages/get?bianhao=' + this.bianhao
                        });
                    }, 1500);
                } else {
                    uni.showToast({
                        title: res.msg || '领取失败',
                        icon: 'none'
                    });
                }
            } catch (e) {
                uni.hideLoading();
                console.error('领取红包失败:', e);
                uni.showToast({
                    title: '网络错误',
                    icon: 'none'
                });
            }
        },
        handleShare() {
            // Share logic
        }
    }
}
</script>

<style lang="scss" scoped>
.packet-page {
    height: 100vh;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow: hidden;

    .bg-image {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        z-index: 0;
    }

    .content-wrapper {
        position: relative;
        z-index: 1;
        width: 100%;
        padding: 40rpx 30rpx;
        box-sizing: border-box;

        .headline-image {
            width: 80%;
            margin-left: 10%;
            margin-bottom: 30rpx;
            margin-top: 30rpx;
        }

        .envelope-section {
            position: relative;

            .envelope-image {
                width: 90%;
                display: block;
                margin: 0 auto;
            }

            .amount-wrapper {
                position: absolute;
                top: 12%;
                left: 50%;
                transform: translateX(-50%);
                text-align: center;

                .amount-display {
                    display: flex;
                    align-items: baseline;
                    justify-content: center;

                    .currency {
                        font-size: 78rpx;
                        color: #FF4444;
                        font-weight: bold;
                        margin-right: 4rpx;
                    }

                    .amount-value {
                        font-size: 156rpx;
                        color: #FF4444;
                        font-weight: bold;
                    }
                }
            }

            .receive-btn-wrapper {
                position: absolute;
                bottom: 15%;
                left: 52%;
                transform: translateX(-50%);
                width: 84%;

                .btn-image {
                    width: 100%;
                    height: auto;
                }

                .btn-text {
                    position: absolute;
                    top: 45%;
                    left: 50%;
                    transform: translate(-50%, -50%);
                    font-size: 32rpx;
                    color: #D73800;
                    font-weight: 500;
                    white-space: nowrap;
                }
            }
        }

        .info-card-section {
            position: relative;
            margin-bottom: 20rpx;

            .info-frame {
                width: 100%;
                display: block;
            }

            .info-content {
                position: absolute;
                top: 20%;
                left: 0;
                right: 0;
                bottom: 0;
                padding: 30rpx;
                box-sizing: border-box;

                .info-list {
                    padding: 0 20rpx;

                    .info-item {
                        font-family: Fotor_HelloFont_GongYiTi;
                        font-size: 40rpx;
                        color: #000000;
                        line-height: 64rpx;
                        text-align: center;

                        .spacer {
                            flex: 1;
                            margin: 0 16rpx;
                        }

                        .star {
                            color: #FFB300;
                            margin-left: 8rpx;
                        }
                    }
                }

                .rule-footer {
                    display: flex;
                    justify-content: center;
                    align-items: center;
                    margin-top: 30rpx;

                    .rule-text {
                        font-size: 26rpx;
                        color: #666;
                        text-decoration: underline;
                    }

                    .share-btn-wrapper {
                        position: absolute;
                        bottom: 20rpx;
                        right: 20rpx;
                        width: 120rpx;
                        height: 120rpx;

                        .share-btn-image {
                            width: 100%;
                            height: 100%;
                        }

                        .share-text {
                            position: absolute;
                            top: 50%;
                            left: 50%;
                            transform: translate(-50%, -50%);
                            font-size: 22rpx;
                            color: #fff;
                            font-weight: bold;
                            text-align: center;
                            line-height: 1.3;
                        }
                    }
                }
            }
        }
    }
}
</style>