微信小程序云开发综合设计

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${val}`.slice(-2); } function times(n, iteratee) { let index = -1; const result = Array(n < 0 ? 0 : n); while (++index < n) { result[index] = iteratee(index); } return result; } function getTrueValue(formattedValue) { if (formattedValue === undefined) { formattedValue = '1'; } while (isNaN(parseInt(formattedValue, 10))) { formattedValue = formattedValue.slice(1); } return parseInt(formattedValue, 10); } function getMonthEndDay(year, month) { return 32 - new Date(year, month - 1, 32).getDate(); } const defaultFormatter = (type, value) => value; VantComponent({ classes: ['active-class', 'toolbar-class', 'column-class'], props: Object.assign(Object.assign({}, pickerProps), { value: { type: null, observer: 'updateValue', }, filter: null, type: { type: String, value: 'datetime', observer: 'updateValue', }, showToolbar: { type: Boolean, value: true, }, formatter: { type: null, value: defaultFormatter, }, minDate: { type: Number, value: new Date(currentYear - 10, 0, 1).getTime(), observer: 'updateValue', }, maxDate: { type: Number, value: new Date(currentYear + 10, 11, 31).getTime(), observer: 'updateValue', }, minHour: { type: Number, value: 0, observer: 'updateValue', }, maxHour: { type: Number, value: 23, observer: 'updateValue', }, minMinute: { type: Number, value: 0, observer: 'updateValue', }, maxMinute: { type: Number, value: 59, observer: 'updateValue', }, }), data: { innerValue: Date.now(), columns: [], }, methods: { updateValue() { const { data } = this; const val = this.correctValue(data.value); const isEqual = val === data.innerValue; if (!isEqual) { this.updateColumnValue(val).then(() => { this.$emit('input', val); }); } else { this.updateColumns(); } }, 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) => { let value = range[0] + index; value = type === 'year' ? `${value}` : padZero(value); return value; }); if (filter) { values = filter(type, values); } return { type, values }; }); return results; }, getRanges() { const { data } = this; if (data.type === 'time') { return [ { type: 'hour', range: [data.minHour, data.maxHour], }, { type: 'minute', range: [data.minMinute, data.maxMinute], }, ]; } const { maxYear, maxDate, maxMonth, maxHour, maxMinute, } = this.getBoundary('max', data.innerValue); const { minYear, minDate, minMonth, minHour, minMinute, } = this.getBoundary('min', data.innerValue); const result = [ { type: 'year', range: [minYear, maxYear], }, { type: 'month', range: [minMonth, maxMonth], }, { type: 'day', range: [minDate, maxDate], }, { type: 'hour', range: [minHour, maxHour], }, { type: 'minute', range: [minMinute, maxMinute], }, ]; if (data.type === 'date') result.splice(3, 2); if (data.type === 'year-month') result.splice(2, 3); return result; }, correctValue(value) { const { data } = this; // validate value const isDateType = data.type !== 'time'; if (isDateType && !isValidDate(value)) { value = data.minDate; } else if (!isDateType && !value) { const { minHour } = data; value = `${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.