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import {useEffect, useRef, useState} from 'react'
import {isInstalled, platform} from './pwa/pwa'
/**
* Download-a-PDF sheet. A bottom sheet on phones, a centered dialog on wider
* screens. The PDF is generated on request, so it is always current.
*/
export default function PdfDialog({
title,
baseUrl,
shownKey,
originalKey,
footnote,
hasCues = false,
sheet = false,
onClose,
}: {
title: string
baseUrl: string
/** The key on screen when it differs from the original; null if not transposed */
shownKey: string | null
originalKey: string | null
footnote?: string
/** The reader has cues on this: offer to print them */
hasCues?: boolean
/** A setlist: offer the big-type set list as well as the charts */
sheet?: boolean
onClose: () => void
}) {
const [useShown, setUseShown] = useState(Boolean(shownKey))
const [paper, setPaper] = useState<'letter' | 'a4'>('letter')
const [withCues, setWithCues] = useState(false)
const [what, setWhat] = useState<'charts' | 'sheet'>('charts')
const closeRef = useRef<HTMLButtonElement>(null)
// The app on an iPhone or iPad opens a PDF link in a viewer with no way to
// save it, so there the PDF goes to the share sheet (Save to Files, Print,
// AirDrop). Sharing needs a fresh tap, so it's made first, then shared.
const [shareSheet, setShareSheet] = useState(false)
const [made, setMade] = useState<File | 'making' | 'failed' | null>(null)
useEffect(() => {
setShareSheet(
isInstalled() && platform() === 'ios' && 'canShare' in navigator,
)
}, [])
useEffect(() => {
closeRef.current?.focus()
const onKey = (e: KeyboardEvent) => e.key === 'Escape' && onClose()
window.addEventListener('keydown', onKey)
return () => window.removeEventListener('keydown', onKey)
}, [onClose])
const params = new URLSearchParams({download: '1', paper})
if (useShown && shownKey) params.set('key', shownKey)
if (what === 'sheet') params.set('sheet', '1')
else if (withCues) params.set('cues', '1')
const href = `${baseUrl}?${params}`
// A different choice is a different PDF
useEffect(() => setMade(null), [href])
async function make() {
setMade('making')
try {
const r = await fetch(href)
if (!r.ok) throw new Error(String(r.status))
const name =
r.headers
.get('Content-Disposition')
?.match(/filename="([^"]+)"/)?.[1] ?? `${title}.pdf`
const file = new File([await r.blob()], name, {
type: 'application/pdf',
})
setMade(navigator.canShare?.({files: [file]}) ? file : 'failed')
} catch {
setMade('failed')
}
}
async function share(file: File) {
try {
await navigator.share({files: [file]})
onClose()
} catch {
// Closed the share sheet: leave the button there to try again
}
}
return (
<div className="fixed inset-0 z-50 flex items-end justify-center md:items-center">
<button
type="button"
aria-label="Close"
onClick={onClose}
className="absolute inset-0 bg-black/60"
tabIndex={-1}
/>
<section
role="dialog"
aria-modal="true"
aria-labelledby="pdf-dialog-title"
className="relative w-full max-w-md rounded-t-2xl border-t border-line-2 bg-panel px-5 pb-[max(env(safe-area-inset-bottom),24px)] pt-3 md:rounded-2xl md:border"
>
<div className="mx-auto mb-2 h-1.5 w-10 rounded bg-line-2 md:hidden" />
<div className="flex items-center justify-between">
<h2 id="pdf-dialog-title" className="text-xl font-extrabold">
Download PDF
</h2>
<button
ref={closeRef}
type="button"
onClick={onClose}
aria-label="Close"
className="flex h-11 w-11 items-center justify-center text-2xl"
>
×
</button>
</div>
<p className="mb-4 text-muted">{title}</p>
{sheet && (
<Choice
legend="What"
options={[
['charts', 'Charts'],
['sheet', 'Set list, big type'],
]}
value={what}
onChange={(v) => setWhat(v as 'charts' | 'sheet')}
/>
)}
{shownKey && (
<Choice
legend="Key"
options={[
['shown', `As shown (${shownKey})`],
['original', `Original (${originalKey ?? '—'})`],
]}
value={useShown ? 'shown' : 'original'}
onChange={(v) => setUseShown(v === 'shown')}
/>
)}
<Choice
legend="Paper"
options={[
['letter', 'Letter'],
['a4', 'A4'],
]}
value={paper}
onChange={(v) => setPaper(v as 'letter' | 'a4')}
/>
{hasCues && what === 'charts' && (
<Choice
legend="Your cues"
options={[
['off', 'Leave off'],
['on', 'Print them'],
]}
value={withCues ? 'on' : 'off'}
onChange={(v) => setWithCues(v === 'on')}
/>
)}
{footnote && <p className="my-4 text-[13px] text-muted">{footnote}</p>}
{shareSheet && made !== 'failed' ? (
<button
type="button"
disabled={made === 'making'}
onClick={() => (made instanceof File ? share(made) : make())}
className={`${big} w-full disabled:opacity-70`}
>
{made === 'making'
? 'Making the PDF…'
: made instanceof File
? 'Save or share PDF'
: 'Make PDF'}
</button>
) : (
<a
href={href}
className={`${big} no-underline`}
onClick={() => setTimeout(onClose, 300)}
>
Download
</a>
)}
{made instanceof File && (
<p className="mt-2 text-center text-[13px] text-muted">
Ready — choose <b>Save to Files</b>, <b>Print</b> or where to send
it.
</p>
)}
</section>
</div>
)
}
const big =
'mt-2 flex min-h-13 items-center justify-center gap-2 rounded-xl bg-accent py-3.5 text-[17px] font-extrabold text-on-accent'
function Choice({
legend,
options,
value,
onChange,
}: {
legend: string
options: [string, string][]
value: string
onChange: (v: string) => void
}) {
return (
<fieldset className="mb-4">
<legend className="mb-2 text-xs font-bold uppercase tracking-widest text-muted">
{legend}
</legend>
<div className="flex overflow-hidden rounded-lg border border-line-2">
{options.map(([v, label]) => (
<button
key={v}
type="button"
aria-pressed={value === v}
onClick={() => onChange(v)}
className={`min-h-11 flex-1 px-3 ${value === v ? 'bg-text font-semibold text-ink' : ''}`}
>
{label}
</button>
))}
</div>
</fieldset>
)
}
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