// 根据条件判断当天日期是否有效
isValidDay(date) {
    let {startDate, endDate, needWeek} = this.data;

    let valid = false;

    if (startDate && endDate) { // 开始日期和结束日期都存在
        if (date >= startDate && date < endDate) {
            valid = true;
        }
    } else if (startDate && !endDate) { // 开始日期存在结束日期不存在
        if (date >= startDate) {
            valid = true;
        }
    } else if (!startDate && endDate) { // 开始日期不存在结束日期存在
        if (date < endDate) {
            valid = true;
        }
    } else {
        valid = true;
    }

    if (!needWeek) {
        let weekDay = date.getDay();
        if (weekDay === 0 || weekDay === 6) {
            valid = false;
        }
    }
    return valid;
}

//  根据传入的日期构造数据
setMonthData() {
    const currentDate = this.data.currentDate;

    let year = currentDate.getFullYear(), month = currentDate.getMonth();

    // 当月所有天数的数据结构
    let currentData = [];

    // 获取当月1号的星期0~6
    let firstDayWeek = new Date(year, month, 1).getDay();

    // 天数, 用来标识当前是本月中的哪一天
    let dayIndex = 0;

    // 第1行
    let firstCol = [];

    for (let i = 0; i < 7; i++) {
        if (i < firstDayWeek) {
            let date = new Date(year, month, dayIndex - (firstDayWeek - i) + 1);
            let valid = this.isValidDay(date);
            firstCol.push({
                date: date,
                dateStr: date.toString(),
                day: date.getDate(),
                valid: valid,
                currentMonth: false
            })
        } else {
            dayIndex += 1;
            let date = new Date(year, month, dayIndex);
            let valid = this.isValidDay(date);
            firstCol.push({
                date: date,
                dateStr: date.toString(),
                day: dayIndex,
                valid: valid,
                currentMonth: true
            });
        }
    }

    currentData.push(firstCol);

    // 第2～4行
    for (let i = 0; i < 3; i++) {
        let col = [];
        for (let j = 0; j < 7; j++) {
            dayIndex += 1;
            let date = new Date(year, month, dayIndex);
            let valid = this.isValidDay(date);
            col.push({
                date: date,
                dateStr: date.toString(),
                day: dayIndex,
                valid: valid,
                currentMonth: true
            });
        }
        currentData.push(col);
    }

    // 第5行
    let lastCol = [];

    // 余下一行中本月的天数
    let restDay = new Date(year, month + 1, 0).getDate() - dayIndex;

    for (let i = 0; i < 7; i++) {
        if (i < restDay) {
            dayIndex += 1;
            let date = new Date(year, month, dayIndex);
            let valid = this.isValidDay(date);
            lastCol.push({
                date: date,
                dateStr: date.toString(),
                day: dayIndex,
                valid: valid,
                currentMonth: true
            });
        } else {
            let date = new Date(year, month + 1, i - restDay + 1);
            let valid = this.isValidDay(date);
            lastCol.push({
                date: date,
                dateStr: date.toString(),
                day: date.getDate(),
                valid: valid,
                currentMonth: false
            });
        }
    }

    currentData.push(lastCol);

    let restDay2 = restDay - 7;

    // 第6行
    let lastCol2 = [];

    for (let i = 0; i < 7; i++) {
        if (i < restDay2) {
            dayIndex += 1;
            let date = new Date(year, month, dayIndex);
            let valid = this.isValidDay(date);
            lastCol2.push({
                date: date,
                dateStr: date.toString(),
                day: dayIndex,
                valid: valid,
                currentMonth: true
            });
        } else {
            let date = new Date(year, month + 1, i - restDay2 + 1);
            let valid = this.isValidDay(date);
            lastCol2.push({
                date: date,
                dateStr: date.toString(),
                day: date.getDate(),
                valid: valid,
                currentMonth: false
            });
        }
    }

    currentData.push(lastCol2);

    this.setData({
        currentData: currentData
    });

}