fangliaoxiaochengxv/wxcomponents/vant/dist/datetime-picker/index.js

import {VantComponent} from '../common/component';
import {isDef} from '../common/validator';
import {pickerProps} from '../picker/shared';

const currentYear = new Date().getFullYear();

function isValidDate(date) {
    return isDef(date) && !isNaN(new Date(date).getTime());
}

function range(num, min, max) {
    return Math.min(Math.max(num, min), max);
}

function padZero(val) {
    return `00${val}`.slice(-2);
}

function times(n, iteratee) {
    let index = -1;
    const result = Array(n < 0 ? 0 : n);
    while (++index < n) {
        result[index] = iteratee(index);
    }
    return result;
}

function getTrueValue(formattedValue) {
    if (formattedValue === undefined) {
        formattedValue = '1';
    }
    while (isNaN(parseInt(formattedValue, 10))) {
        formattedValue = formattedValue.slice(1);
    }
    return parseInt(formattedValue, 10);
}

function getMonthEndDay(year, month) {
    return 32 - new Date(year, month - 1, 32).getDate();
}

const defaultFormatter = (type, value) => value;
VantComponent({
    classes: ['active-class', 'toolbar-class', 'column-class'],
    props: Object.assign(Object.assign({}, pickerProps), {
        value: {
            type: null,
            observer: 'updateValue',
        }, filter: null, type: {
            type: String,
            value: 'datetime',
            observer: 'updateValue',
        }, showToolbar: {
            type: Boolean,
            value: true,
        }, formatter: {
            type: null,
            value: defaultFormatter,
        }, minDate: {
            type: Number,
            value: new Date(currentYear - 10, 0, 1).getTime(),
            observer: 'updateValue',
        }, maxDate: {
            type: Number,
            value: new Date(currentYear + 10, 11, 31).getTime(),
            observer: 'updateValue',
        }, minHour: {
            type: Number,
            value: 0,
            observer: 'updateValue',
        }, maxHour: {
            type: Number,
            value: 23,
            observer: 'updateValue',
        }, minMinute: {
            type: Number,
            value: 0,
            observer: 'updateValue',
        }, maxMinute: {
            type: Number,
            value: 59,
            observer: 'updateValue',
        }
    }),
    data: {
        innerValue: Date.now(),
        columns: [],
    },
    methods: {
        updateValue() {
            const {data} = this;
            const val = this.correctValue(data.value);
            const isEqual = val === data.innerValue;
            this.updateColumnValue(val).then(() => {
                if (!isEqual) {
                    this.$emit('input', val);
                }
            });
        },
        getPicker() {
            if (this.picker == null) {
                this.picker = this.selectComponent('.van-datetime-picker');
                const {picker} = this;
                const {setColumnValues} = picker;
                picker.setColumnValues = (...args) => setColumnValues.apply(picker, [...args, false]);
            }
            return this.picker;
        },
        updateColumns() {
            const {formatter = defaultFormatter} = this.data;
            const results = this.getOriginColumns().map((column) => ({
                values: column.values.map((value) => formatter(column.type, value)),
            }));
            return this.set({columns: results});
        },
        getOriginColumns() {
            const {filter} = this.data;
            const results = this.getRanges().map(({type, range}) => {
                let values = times(range[1] - range[0] + 1, (index) => {
                    const value = range[0] + index;
                    return type === 'year' ? `${value}` : padZero(value);
                });
                if (filter) {
                    values = filter(type, values);
                }
                return {type, values};
            });
            return results;
        },
        getRanges() {
            const {data} = this;
            if (data.type === 'time') {
                return [
                    {
                        type: 'hour',
                        range: [data.minHour, data.maxHour],
                    },
                    {
                        type: 'minute',
                        range: [data.minMinute, data.maxMinute],
                    },
                ];
            }
            const {maxYear, maxDate, maxMonth, maxHour, maxMinute,} = this.getBoundary('max', data.innerValue);
            const {minYear, minDate, minMonth, minHour, minMinute,} = this.getBoundary('min', data.innerValue);
            const result = [
                {
                    type: 'year',
                    range: [minYear, maxYear],
                },
                {
                    type: 'month',
                    range: [minMonth, maxMonth],
                },
                {
                    type: 'day',
                    range: [minDate, maxDate],
                },
                {
                    type: 'hour',
                    range: [minHour, maxHour],
                },
                {
                    type: 'minute',
                    range: [minMinute, maxMinute],
                },
            ];
            if (data.type === 'date')
                result.splice(3, 2);
            if (data.type === 'year-month')
                result.splice(2, 3);
            return result;
        },
        correctValue(value) {
            const {data} = this;
            // validate value
            const isDateType = data.type !== 'time';
            if (isDateType && !isValidDate(value)) {
                value = data.minDate;
            } else if (!isDateType && !value) {
                const {minHour} = data;
                value = `${padZero(minHour)}:00`;
            }
            // time type
            if (!isDateType) {
                let [hour, minute] = value.split(':');
                hour = padZero(range(hour, data.minHour, data.maxHour));
                minute = padZero(range(minute, data.minMinute, data.maxMinute));
                return `${hour}:${minute}`;
            }
            // date type
            value = Math.max(value, data.minDate);
            value = Math.min(value, data.maxDate);
            return value;
        },
        getBoundary(type, innerValue) {
            const value = new Date(innerValue);
            const boundary = new Date(this.data[`${type}Date`]);
            const year = boundary.getFullYear();
            let month = 1;
            let date = 1;
            let hour = 0;
            let minute = 0;
            if (type === 'max') {
                month = 12;
                date = getMonthEndDay(value.getFullYear(), value.getMonth() + 1);
                hour = 23;
                minute = 59;
            }
            if (value.getFullYear() === year) {
                month = boundary.getMonth() + 1;
                if (value.getMonth() + 1 === month) {
                    date = boundary.getDate();
                    if (value.getDate() === date) {
                        hour = boundary.getHours();
                        if (value.getHours() === hour) {
                            minute = boundary.getMinutes();
                        }
                    }
                }
            }
            return {
                [`${type}Year`]: year,
                [`${type}Month`]: month,
                [`${type}Date`]: date,
                [`${type}Hour`]: hour,
                [`${type}Minute`]: minute,
            };
        },
        onCancel() {
            this.$emit('cancel');
        },
        onConfirm() {
            this.$emit('confirm', this.data.innerValue);
        },
        onChange() {
            const {data} = this;
            let value;
            const picker = this.getPicker();
            const originColumns = this.getOriginColumns();
            if (data.type === 'time') {
                const indexes = picker.getIndexes();
                value = `${+originColumns[0].values[indexes[0]]}:${+originColumns[1]
                    .values[indexes[1]]}`;
            } else {
                const indexes = picker.getIndexes();
                const values = indexes.map((value, index) => originColumns[index].values[value]);
                const year = getTrueValue(values[0]);
                const month = getTrueValue(values[1]);
                const maxDate = getMonthEndDay(year, month);
                let date = getTrueValue(values[2]);
                if (data.type === 'year-month') {
                    date = 1;
                }
                date = date > maxDate ? maxDate : date;
                let hour = 0;
                let minute = 0;
                if (data.type === 'datetime') {
                    hour = getTrueValue(values[3]);
                    minute = getTrueValue(values[4]);
                }
                value = new Date(year, month - 1, date, hour, minute);
            }
            value = this.correctValue(value);
            this.updateColumnValue(value).then(() => {
                this.$emit('input', value);
                this.$emit('change', picker);
            });
        },
        updateColumnValue(value) {
            let values = [];
            const {type} = this.data;
            const formatter = this.data.formatter || defaultFormatter;
            const picker = this.getPicker();
            if (type === 'time') {
                const pair = value.split(':');
                values = [formatter('hour', pair[0]), formatter('minute', pair[1])];
            } else {
                const date = new Date(value);
                values = [
                    formatter('year', `${date.getFullYear()}`),
                    formatter('month', padZero(date.getMonth() + 1)),
                ];
                if (type === 'date') {
                    values.push(formatter('day', padZero(date.getDate())));
                }
                if (type === 'datetime') {
                    values.push(formatter('day', padZero(date.getDate())), formatter('hour', padZero(date.getHours())), formatter('minute', padZero(date.getMinutes())));
                }
            }
            return this.set({innerValue: value})
                .then(() => this.updateColumns())
                .then(() => picker.setValues(values));
        },
    },
    created() {
        const innerValue = this.correctValue(this.data.value);
        this.updateColumnValue(innerValue).then(() => {
            this.$emit('input', innerValue);
        });
    },
});