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import { createSignal, Show, For } from "solid-js";
import { useClickOutside } from "../utils/clickOutside";
interface DatePickerProps {
value: string;
onChange: (value: string) => void;
}
const MONTHS = [
"January", "February", "March", "April", "May", "June",
"July", "August", "September", "October", "November", "December",
];
const WEEKDAYS = ["Su", "Mo", "Tu", "We", "Th", "Fr", "Sa"];
function daysInMonth(year: number, month: number) {
return new Date(year, month + 1, 0).getDate();
}
function firstDayOfMonth(year: number, month: number) {
return new Date(year, month, 1).getDay();
}
function parseDate(value: string) {
if (!value) return null;
const parts = value.split("-");
return { year: parseInt(parts[0]), month: parseInt(parts[1]) - 1, day: parseInt(parts[2]) };
}
function formatDate(year: number, month: number, day: number) {
return `${year}-${String(month + 1).padStart(2, "0")}-${String(day).padStart(2, "0")}`;
}
export default function DatePicker(props: DatePickerProps) {
const parsed = () => parseDate(props.value);
const today = new Date();
let triggerRef: HTMLButtonElement | undefined;
let containerRef: HTMLDivElement | undefined;
const [open, setOpen] = createSignal(false);
const [dropdownStyle, setDropdownStyle] = createSignal<Record<string, string>>({});
const [viewYear, setViewYear] = createSignal(parsed()?.year ?? today.getFullYear());
const [viewMonth, setViewMonth] = createSignal(parsed()?.month ?? today.getMonth());
function toggleOpen() {
if (!open() && triggerRef) {
const rect = triggerRef.getBoundingClientRect();
setDropdownStyle({ top: `${rect.bottom + 2}px`, left: `${rect.left}px` });
}
setOpen(!open());
}
useClickOutside(() => containerRef, setOpen);
function prevMonth() {
if (viewMonth() === 0) {
setViewMonth(11);
setViewYear(viewYear() - 1);
} else {
setViewMonth(viewMonth() - 1);
}
}
function nextMonth() {
if (viewMonth() === 11) {
setViewMonth(0);
setViewYear(viewYear() + 1);
} else {
setViewMonth(viewMonth() + 1);
}
}
function selectDay(day: number) {
props.onChange(formatDate(viewYear(), viewMonth(), day));
setOpen(false);
}
function clear() {
props.onChange("");
setOpen(false);
}
function calendarDays() {
const total = daysInMonth(viewYear(), viewMonth());
const offset = firstDayOfMonth(viewYear(), viewMonth());
const days: (number | null)[] = [];
for (let blank = 0; blank < offset; blank++) days.push(null);
for (let day = 1; day <= total; day++) days.push(day);
return days;
}
function isSelected(day: number) {
const selected = parsed();
return selected && selected.year === viewYear() && selected.month === viewMonth() && selected.day === day;
}
function displayValue() {
const selected = parsed();
if (!selected) return "—";
return `${MONTHS[selected.month]} ${selected.day}, ${selected.year}`;
}
return (
<div class="datepicker" ref={containerRef}>
<button type="button" class="datepicker-trigger" ref={triggerRef} onClick={toggleOpen}>
{displayValue()}
</button>
<Show when={open()}>
<div class="datepicker-dropdown datepicker-dropdown-fixed" style={dropdownStyle()}>
<div class="datepicker-nav">
<button type="button" class="datepicker-nav-btn" onClick={prevMonth}>‹</button>
<span class="datepicker-nav-title">{MONTHS[viewMonth()]} {viewYear()}</span>
<button type="button" class="datepicker-nav-btn" onClick={nextMonth}>›</button>
</div>
<div class="datepicker-weekdays">
<For each={WEEKDAYS}>
{(day: string) => <span class="datepicker-weekday">{day}</span>}
</For>
</div>
<div class="datepicker-grid">
<For each={calendarDays()}>
{(day: number | null) => (
<Show when={day !== null} fallback={<span class="datepicker-blank" />}>
<button
type="button"
class="datepicker-day"
classList={{ "datepicker-day-selected": isSelected(day!) ?? undefined }}
onClick={() => selectDay(day!)}
>
{day}
</button>
</Show>
)}
</For>
</div>
<div class="datepicker-footer">
<button type="button" class="datepicker-clear" onClick={clear}>Clear</button>
</div>
</div>
</Show>
</div>
);
}
|
