小程序 消息订阅

/**
 * @desc 小程序订阅功能
 * @param {Array} tmplIds 订阅列表
 * @returns {Promise} 返回promise
 */

// 永久关闭订阅则代表点击了我不在接受此消息，再次订阅是无法弹起授权窗口的。普通关闭时可以再次弹起授权窗口。


export const Subscribe = (tmplIds = []) => {
    return new Promise((resolve, reject) => {
        // 判断是否为微信小程序，不是的不做订阅进行跳过
        let isWx = false;
        // #ifdef MP-WEIXIN
        isWx = true;
        // #endif
        if (!isWx) resolve(1);
        console.log('进来了哟')
        // 判断基本库是否在2.8.3，低于的暂时不做订阅进行跳过
        const versionCan = compareVersion("2.8.3");
        if (versionCan === -1) resolve(1);
        // 主流程
        requestSubscribe(tmplIds, resolve, reject)
    })

}
// 申请订阅功能
function requestSubscribe(tmplIds, resolve, reject) {
    uni.requestSubscribeMessage({
        tmplIds,
        success: async res => {
            // 检查订阅数量
            let checkSubscribeBool = await checkSubscribeAll(tmplIds, res);
            if (checkSubscribeBool) {
                // 用户完成订阅
                console.log("[用户完成订阅]")
                resolve(1);
            } else {
                // 跳去检查永久关闭订阅还是普通关闭订阅
                guidSubscribeMessageAuthAfter(tmplIds, resolve, reject);
            }
        },
        fail: res => {
            console.log(res, "订阅，失败");
            if (res.errCode == 20004) {
                // console.log(res, 'fail:用户关闭了主开关，无法进行订阅,引导开启---');
                guideOpenSubscribeMessage(tmplIds, resolve, reject);
            }
            return
        }
    })
}



// 计算用户订阅消息的数量
function checkSubscribeAll(tmplIds, res) {
    // 将accept的生成一个数组，判断申请的订阅消息是不是已经订阅消息的子集
    let arr = [];
    for (const key of Object.keys(res)) {
        if (res[key] === 'accept') {
            arr.push(key);
        }
    }
    if (arr.length == tmplIds.length) {
        console.log('订阅完毕')
        return true
    } else {
        console.log('没订阅或者少订阅')
        return false
    }

}

// 检查用户是否授权完毕（检查时永久关闭还是普通关闭）
function guidSubscribeMessageAuthAfter(tmplIds, resolve, reject) {
    uni.getSetting({
        withSubscriptions: true,
        success: async res => {
            let {
                authSetting = {},
                subscriptionsSetting: { mainSwitch = false, itemSettings = {} } = {}
            } = res;
            if (Object.keys(itemSettings).length == 0) {   // 这种情况是普通关闭
                uni.showModal({
                    title: "温馨提示",
                    content: "同意订阅才能及时获知完成进度领取优惠",
                    confirmText: "重新订阅",
                    cancelText: "我再看看",
                    success: res => {
                        if (res.confirm) {
                            // 重新调起授权订阅
                            requestSubscribe(tmplIds, resolve, reject);
                        } else if (res.cancel) {
                            //没成功订阅，返回reject
                            reject(2);
                        }
                    }
                });
            } else {   // 这种是订阅成功或永久关闭
                let checkSubscribeBool = await checkSubscribeAll(tmplIds, itemSettings);
                if (
                    authSetting["scope.subscribeMessage"] ||
                    (mainSwitch && checkSubscribeBool)
                ) {
                    //成功
                    console.log("用户手动开启同意了，订阅消息");
                    resolve(1);
                } else {
                    //失败，永久关闭
                    guideOpenSubscribeMessage(tmplIds, resolve, reject);
                }
            }
        }
    });
}



//引导用户重新授权（永久关闭的方法）
function guideOpenSubscribeMessage(tmplIds, resolve, reject) {
    // console.log(resolve, reject, 'rescovavasr1')
    uni.showModal({
        title: "温馨提示",
        content: "检测到您没有开启全部订阅消息的权限，是否去设置？",
        success: res => {

            if (res.confirm) {
                uni.openSetting({
                    success: res => {
                        // 在检查是否全部订阅完毕
                        guidSubscribeMessageAuthAfter(tmplIds, resolve, reject);
                    }
                });
            } else if (res.cancel) {
                // console.log(resolve, reject, 'rescovavasr2')
                uni.showModal({
                    title: "温馨提示",
                    content: "同意订阅才能及时获知完成进度领取优惠",
                    showCancel: false,
                    confirmText: "我知道了"
                });
                reject(2);
            }
        }
    });
}

// 比较版本号
function compareVersion(v2) {
    let { SDKVersion: v1 } = uni.getSystemInfoSync();
    v1 = v1.split(".");
    v2 = v2.split(".");
    const len = Math.max(v1.length, v2.length);

    while (v1.length < len) {
        v1.push("0");
    }
    while (v2.length < len) {
        v2.push("0");
    }

    for (let i = 0; i < len; i++) {
        const num1 = parseInt(v1[i]);
        const num2 = parseInt(v2[i]);

        if (num1 > num2) {
            return 1;
        } else if (num1 < num2) {
            return -1;
        }
    }

    return 0;
}