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import Link from 'next/link'
import {useMemo, useState} from 'react'
import {detectKey, parseChordPro, transposeChart} from '@/lib/chordpro'
import {shortDate} from '@/lib/dates'
import {formatLength} from '@/lib/gig'
import ChartBody from '@/components/chart/ChartBody'
import ChordPopover from '@/components/chart/ChordPopover'
import PdfDialog from '@/components/PdfDialog'
import {useStoredState} from '@/components/useStoredState'
import {useCueSlots} from '@/components/cues/useCueSlots'
import type {Cue} from '@/lib/cues'
export type ChartSong = {
id: string
title: string
writer: string | null
leadSinger: string | null
guitars: number | null
seconds: number | null
keys: string | null
percussion: string | null
youtubeUrl: string | null
lyricsUrl: string | null
notes: string | null
ready: boolean
}
export const TEXT_SIZES = [14, 16, 18, 21, 24, 28]
export default function ChartScreen({
song,
source,
version,
versions,
editedBy,
editedAt,
imported = false,
cues = [],
demo = false,
}: {
song: ChartSong
source: string
version: number
versions: number
editedBy: string | null
editedAt: string | null
imported?: boolean
/** Your own cues on this song */
cues?: Cue[]
/** The tour's sample song: everything shows, nothing saves or leaves */
demo?: boolean
}) {
const [steps, setSteps] = useStoredState(`mw:transpose:${song.id}`, 0)
const [sizeIdx, setSizeIdx] = useStoredState('mw:text-size', 2)
const [pdfOpen, setPdfOpen] = useState(false)
const original = useMemo(() => parseChordPro(source), [source])
const chart = useMemo(
() => transposeChart(original, steps),
[original, steps],
)
const originalKey = detectKey(original)
const key = detectKey(chart)
const size = TEXT_SIZES[Math.min(Math.max(sizeIdx, 0), TEXT_SIZES.length - 1)]
const [cueMode, setCueMode] = useState(false)
const slots = useCueSlots({
songId: song.id,
chart,
songKey: originalKey,
steps,
initial: cues,
editing: cueMode,
})
const details = [
song.writer,
song.leadSinger && `Lead ${song.leadSinger}`,
[song.keys, song.percussion].filter(Boolean).join(' · '),
song.guitars != null &&
`${song.guitars} guitar${song.guitars === 1 ? '' : 's'}`,
song.seconds && formatLength(song.seconds),
].filter(Boolean)
return (
<main className="mx-auto max-w-[1400px] px-4 pb-10 pt-4 md:px-7">
<div className="flex flex-wrap items-center gap-x-4 gap-y-3">
<div className="min-w-0 flex-1 basis-72">
<Link
href="/songs"
className="text-sm text-muted no-underline hover:text-text"
>
‹ All songs
</Link>
<h1 className="mt-1 text-3xl font-extrabold leading-tight md:text-4xl">
{song.title}
</h1>
</div>
<div className="flex flex-wrap items-center gap-2">
<div
role="group"
aria-label="Key"
className="flex items-center rounded-lg border border-line-2"
>
<button
type="button"
aria-label="Transpose down a semitone"
onClick={() => setSteps(steps - 1)}
className="h-11 w-11 text-xl"
>
−
</button>
<span className="min-w-12 text-center font-mono text-lg font-bold text-amber">
{key ?? '—'}
</span>
<button
type="button"
aria-label="Transpose up a semitone"
onClick={() => setSteps(steps + 1)}
className="h-11 w-11 text-xl"
>
+
</button>
</div>
{steps % 12 !== 0 && (
<button
type="button"
onClick={() => setSteps(0)}
className="min-h-11 rounded-lg px-3 text-sm text-muted underline"
>
Back to {originalKey}
</button>
)}
<div
role="group"
aria-label="Text size"
className="flex items-center rounded-lg border border-line-2"
>
<button
type="button"
aria-label="Smaller text"
onClick={() => setSizeIdx(Math.max(0, sizeIdx - 1))}
className="h-11 w-11 text-sm font-semibold"
>
A
</button>
<button
type="button"
aria-label="Larger text"
onClick={() =>
setSizeIdx(Math.min(TEXT_SIZES.length - 1, sizeIdx + 1))
}
className="h-11 w-11 text-xl font-semibold"
>
A
</button>
</div>
<button
type="button"
data-tour="cues"
aria-pressed={cueMode}
onClick={() => !demo && setCueMode(!cueMode)}
className={`inline-flex min-h-11 items-center gap-1.5 rounded-lg px-4 ${cueMode ? 'bg-accent font-bold text-on-accent' : 'border border-line-2'}`}
>
{cueMode ? 'Done' : 'My cues'}
{!cueMode && slots.count > 0 && (
<span className="font-mono text-sm text-amber">
{slots.count}
</span>
)}
</button>
<Link
href={demo ? '#' : `/songs/${song.id}/edit`}
onClick={demo ? (e) => e.preventDefault() : undefined}
className="inline-flex min-h-11 items-center rounded-lg border border-line-2 px-4 no-underline"
>
Edit
</Link>
<button
type="button"
data-tour="pdf"
onClick={() => !demo && setPdfOpen(true)}
className="inline-flex min-h-11 items-center gap-2 rounded-lg bg-accent px-4 font-bold text-on-accent"
>
<DownloadIcon /> PDF
</button>
</div>
</div>
<div className="mt-3 flex flex-wrap items-center gap-x-5 gap-y-2 border-b border-line pb-3 text-sm text-muted">
{details.map((d, i) => (
<span key={i}>{d}</span>
))}
{song.youtubeUrl && (
<a
href={song.youtubeUrl}
target="_blank"
rel="noreferrer"
className="text-sky"
>
Recording ↗
</a>
)}
<span className="flex-1" />
{editedBy && editedAt && (
<span>
{imported ? (
<>Imported · {shortDate(editedAt)}</>
) : (
<>
Edited by <strong className="text-text">{editedBy}</strong> ·{' '}
{shortDate(editedAt)}
</>
)}
</span>
)}
{/* A song with no chart yet has no history to show */}
{versions > 0 && (
<Link
data-tour="history"
href={demo ? '#' : `/songs/${song.id}/history`}
onClick={demo ? (e) => e.preventDefault() : undefined}
className="inline-flex min-h-8 items-center rounded-full border border-line-2 px-3 text-text no-underline"
>
History · {versions} version{versions === 1 ? '' : 's'}
</Link>
)}
</div>
{song.notes && (
<p className="mt-3 whitespace-pre-wrap rounded-lg bg-panel px-4 py-3 text-[15px]">
{song.notes}
</p>
)}
{cueMode && (
<p className="mt-3 rounded-lg border border-amber/60 px-4 py-2 text-sm text-muted">
Your cues — notes, pictures of a few bars, or notation — sit on the
chart where you put them. Only you see them; the chart itself doesn’t
change.
</p>
)}
<div className="mt-5" style={{fontSize: size}}>
<ChartBody chart={chart} top={slots.top} extra={slots.extra} />
<ChordPopover />
</div>
{pdfOpen && (
<PdfDialog
title={song.title}
onClose={() => setPdfOpen(false)}
baseUrl={`/api/songs/${song.id}/pdf`}
shownKey={steps % 12 !== 0 ? key : null}
originalKey={originalKey}
hasCues={slots.count > 0}
footnote={`Every page says version ${version}${editedBy ? `, edited by ${editedBy}` : ''}, so an old printout is easy to spot.`}
/>
)}
</main>
)
}
export function DownloadIcon() {
return (
<svg
width="18"
height="18"
viewBox="0 0 24 24"
fill="none"
stroke="currentColor"
strokeWidth="2.2"
strokeLinecap="round"
strokeLinejoin="round"
aria-hidden="true"
>
<path d="M12 4v11" />
<path d="M7 10l5 5 5-5" />
<path d="M5 20h14" />
</svg>
)
}
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