Buchungskalender: PDF-Writer und Rechnungs-PDF
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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// Minimaler PDF-Writer (Buchungskalender N2): Helvetica und Helvetica-Bold, WinAnsiEncoding, keine Abhaengigkeit.
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// Koordinaten: Punkt, Ursprung oben links (y waechst nach unten). Ausgabe ist deterministisch.
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// Helvetica-AFM-Breiten (1/1000 em) fuer die WinAnsi-Codes 32..255 (0 = nicht definiert, wird als '?' geschrieben).
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const W_NORMAL = [
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278, 278, 355, 556, 556, 889, 667, 191, 333, 333, 389, 584, 278, 333, 278, 278,
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556, 556, 556, 556, 556, 556, 556, 556, 556, 556, 278, 278, 584, 584, 584, 556,
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1015, 667, 667, 722, 722, 667, 611, 778, 722, 278, 500, 667, 556, 833, 722, 778,
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667, 778, 722, 667, 611, 722, 667, 944, 667, 667, 611, 278, 278, 278, 469, 556,
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333, 556, 556, 500, 556, 556, 278, 556, 556, 222, 222, 500, 222, 833, 556, 556,
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556, 556, 333, 500, 278, 556, 500, 722, 500, 500, 500, 334, 260, 334, 584, 0,
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556, 0, 222, 556, 333, 1000, 556, 556, 333, 1000, 667, 333, 1000, 0, 611, 0,
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0, 222, 222, 333, 333, 350, 556, 1000, 333, 1000, 500, 333, 944, 0, 500, 667,
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278, 333, 556, 556, 556, 556, 260, 556, 333, 737, 370, 556, 584, 333, 737, 333,
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400, 584, 333, 333, 333, 556, 537, 278, 333, 333, 365, 556, 834, 834, 834, 611,
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667, 667, 667, 667, 667, 667, 1000, 722, 667, 667, 667, 667, 278, 278, 278, 278,
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722, 722, 778, 778, 778, 778, 778, 584, 778, 722, 722, 722, 722, 667, 667, 611,
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556, 556, 556, 556, 556, 556, 889, 500, 556, 556, 556, 556, 278, 278, 278, 278,
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556, 556, 556, 556, 556, 556, 556, 584, 611, 556, 556, 556, 556, 500, 556, 500,
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]
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const W_FETT = [
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278, 333, 474, 556, 556, 889, 722, 238, 333, 333, 389, 584, 278, 333, 278, 278,
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556, 556, 556, 556, 556, 556, 556, 556, 556, 556, 333, 333, 584, 584, 584, 611,
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975, 722, 722, 722, 722, 667, 611, 778, 722, 278, 556, 722, 611, 833, 722, 778,
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667, 778, 722, 667, 611, 722, 667, 944, 667, 667, 611, 333, 278, 333, 584, 556,
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333, 556, 611, 556, 611, 556, 333, 611, 611, 278, 278, 556, 278, 889, 611, 611,
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611, 611, 389, 556, 333, 611, 556, 778, 556, 556, 500, 389, 280, 389, 584, 0,
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556, 0, 278, 556, 500, 1000, 556, 556, 333, 1000, 667, 333, 1000, 0, 611, 0,
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0, 278, 278, 500, 500, 350, 556, 1000, 333, 1000, 556, 333, 944, 0, 500, 667,
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278, 333, 556, 556, 556, 556, 280, 556, 333, 737, 370, 556, 584, 333, 737, 333,
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400, 584, 333, 333, 333, 611, 556, 278, 333, 333, 365, 556, 834, 834, 834, 611,
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722, 722, 722, 722, 722, 722, 1000, 722, 667, 667, 667, 667, 278, 278, 278, 278,
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722, 722, 778, 778, 778, 778, 778, 584, 778, 722, 722, 722, 722, 667, 667, 611,
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556, 556, 556, 556, 556, 556, 889, 556, 556, 556, 556, 556, 278, 278, 278, 278,
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611, 611, 611, 611, 611, 611, 611, 584, 611, 611, 611, 611, 611, 556, 611, 556,
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]
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// CP1252-Zeichen oberhalb von U+007F im Bereich 0x80..0x9F.
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const CP1252 = new Map(Object.entries({
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'€': 0x80, '‚': 0x82, 'ƒ': 0x83, '„': 0x84, '…': 0x85, '†': 0x86, '‡': 0x87, 'ˆ': 0x88, '‰': 0x89, 'Š': 0x8a,
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'‹': 0x8b, 'Œ': 0x8c, 'Ž': 0x8e, '‘': 0x91, '’': 0x92, '“': 0x93, '”': 0x94, '•': 0x95, '–': 0x96, '—': 0x97,
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'˜': 0x98, '™': 0x99, 'š': 0x9a, '›': 0x9b, 'œ': 0x9c, 'ž': 0x9e, 'Ÿ': 0x9f,
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}))
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/** Ein Zeichen als WinAnsi-Code; Unbekanntes wird '?'. */
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function code(ch) {
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if (ch === '−') return 0x2d
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const c = ch.codePointAt(0)
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if (c === 0x0a || c === 0x0d || c === 0x09) return 0x20
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if (c >= 32 && c < 127) return c
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if (c >= 160 && c <= 255) return c
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return CP1252.get(ch) ?? 0x3f
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}
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const bytes = (str) => Array.from(String(str ?? ''), code)
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const zahl = (n) => String(Math.round(n * 100) / 100)
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export class PdfDoc {
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constructor({ breite = 595.28, hoehe = 841.89 } = {}) {
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this.b = breite
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this.h = hoehe
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this.seiten = []
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this.aktuell = null
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this.seite()
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}
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/** Neue Seite beginnen (und zur aktuellen machen). */
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seite() {
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this.seiten.push([])
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this.aktuell = this.seiten.length - 1
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return this.aktuell
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}
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/** Auf eine bestehende Seite zurueckschalten (z. B. fuer Fusszeilen). */
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aufSeite(n) {
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if (!(n >= 0 && n < this.seiten.length)) throw new RangeError('Seite existiert nicht')
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this.aktuell = n
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}
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get seitenzahl() {
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return this.seiten.length
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}
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breite(str, groesse = 10, fett = false) {
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const w = fett ? W_FETT : W_NORMAL
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let sum = 0
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for (const c of bytes(str)) sum += w[c - 32] || w[0x3f - 32]
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return (sum * groesse) / 1000
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}
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/** Text; y = Grundlinie von oben, x = linker Rand (bei rechts: rechter Rand). */
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text(x, y, str, { groesse = 10, fett = false, rechts = false } = {}) {
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const bs = bytes(str)
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if (bs.length === 0) return
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const px = rechts ? x - this.breite(str, groesse, fett) : x
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let s = ''
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for (const c of bs) s += c === 0x5c || c === 0x28 || c === 0x29 ? `\\${String.fromCharCode(c)}` : String.fromCharCode(c)
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this.seiten[this.aktuell].push(`BT /${fett ? 'F2' : 'F1'} ${zahl(groesse)} Tf ${zahl(px)} ${zahl(this.h - y)} Td (${s}) Tj ET`)
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}
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linie(x1, y1, x2, y2, { dicke = 0.5 } = {}) {
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this.seiten[this.aktuell].push(`${zahl(dicke)} w ${zahl(x1)} ${zahl(this.h - y1)} m ${zahl(x2)} ${zahl(this.h - y2)} l S`)
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}
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/** Bricht an Leerzeichen um; ueberlange Woerter werden hart getrennt. */
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umbrechen(str, maxBreite, groesse = 10, fett = false) {
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const zeilen = []
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for (const absatz of String(str ?? '').split(/\r?\n/)) {
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let zeile = ''
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for (let wort of absatz.split(/ +/).filter(Boolean)) {
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const probe = zeile ? `${zeile} ${wort}` : wort
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if (this.breite(probe, groesse, fett) <= maxBreite) {
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zeile = probe
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continue
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}
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if (zeile) zeilen.push(zeile)
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zeile = ''
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while (this.breite(wort, groesse, fett) > maxBreite && wort.length > 1) {
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let n = wort.length - 1
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while (n > 1 && this.breite(wort.slice(0, n), groesse, fett) > maxBreite) n--
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zeilen.push(wort.slice(0, n))
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wort = wort.slice(n)
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}
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zeile = wort
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}
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zeilen.push(zeile)
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}
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return zeilen
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}
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toBuffer() {
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const teile = []
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const offs = []
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let len = 0
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const add = (buf) => {
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const b = Buffer.isBuffer(buf) ? buf : Buffer.from(buf, 'latin1')
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teile.push(b)
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len += b.length
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}
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const obj = (nr, inhalt) => {
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offs[nr] = len
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add(`${nr} 0 obj\n`)
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add(inhalt)
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add('\nendobj\n')
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}
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const n = this.seiten.length
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add('%PDF-1.4\n%\xe2\xe3\xcf\xd3\n')
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obj(1, '<< /Type /Catalog /Pages 2 0 R >>')
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const kids = this.seiten.map((_, i) => `${5 + i * 2} 0 R`).join(' ')
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obj(2, `<< /Type /Pages /Kids [${kids}] /Count ${n} >>`)
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obj(3, '<< /Type /Font /Subtype /Type1 /BaseFont /Helvetica /Encoding /WinAnsiEncoding >>')
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obj(4, '<< /Type /Font /Subtype /Type1 /BaseFont /Helvetica-Bold /Encoding /WinAnsiEncoding >>')
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this.seiten.forEach((ops, i) => {
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const pn = 5 + i * 2
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obj(pn, `<< /Type /Page /Parent 2 0 R /MediaBox [0 0 ${zahl(this.b)} ${zahl(this.h)}] /Resources << /Font << /F1 3 0 R /F2 4 0 R >> >> /Contents ${pn + 1} 0 R >>`)
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const strom = Buffer.from(ops.join('\n') + '\n', 'latin1')
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offs[pn + 1] = len
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add(`${pn + 1} 0 obj\n<< /Length ${strom.length} >>\nstream\n`)
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add(strom)
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add('endstream\nendobj\n')
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})
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const total = 5 + n * 2
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const xref = len
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add(`xref\n0 ${total}\n0000000000 65535 f \n`)
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for (let i = 1; i < total; i++) add(`${String(offs[i]).padStart(10, '0')} 00000 n \n`)
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add(`trailer\n<< /Size ${total} /Root 1 0 R >>\nstartxref\n${xref}\n%%EOF\n`)
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return Buffer.concat(teile)
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}
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}
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// Rechnungs-PDF aus dem unveraenderlichen Schnappschuss ukRechnungen.inhalt (N2). Deterministisch, A4.
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import { PdfDoc } from './pdf.js'
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import { formatEuro } from './preis.js'
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import { formatTag } from './datum.js'
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const L = 56
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const R = 595.28 - 56
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const UNTEN = 745 // Inhalt endet hier, darunter Fusszeile
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const tag = (t) => (/^\d{4}-\d{2}-\d{2}$/.test(String(t ?? '')) ? formatTag(t) : String(t ?? ''))
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const nz = (s) => String(s ?? '').trim()
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const ortZeile = (o) => [nz(o?.plz), nz(o?.ort)].filter(Boolean).join(' ')
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export function rechnungPdf(inhalt, { art = 'rechnung', nummer = '', datum = '' } = {}) {
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const i = inhalt || {}
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const a = i.aussteller || {}
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const e = i.empfaenger || {}
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const storno = art === 'storno'
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const klein = (i.steuerart || i.summen?.steuerart) === 'kleinunternehmer'
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const doc = new PdfDoc()
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let y
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// Absenderzeile (klein)
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const absender = [nz(a.firma), nz(a.strasse), ortZeile(a)].filter(Boolean).join(' · ')
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doc.text(L, 60, absender, { groesse: 7.5 })
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doc.linie(L, 64, L + 250, 64, { dicke: 0.3 })
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// Empfaenger
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const adr = [nz(e.firma), nz(e.name), nz(e.strasse), ortZeile(e), nz(e.land)].filter(Boolean)
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adr.forEach((z, k) => doc.text(L, 82 + k * 13, z, { groesse: 10 }))
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// Rechts: Nummer, Datum, Leistungszeitraum
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const kopf = [
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[storno ? 'Stornonummer' : 'Rechnungsnummer', nz(nummer)],
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['Datum', tag(datum)],
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['Leistungszeitraum', `${tag(i.von)} – ${tag(i.bis)}`],
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]
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if (storno && i.bezugNummer) kopf.splice(1, 0, ['Zu Rechnung', nz(i.bezugNummer)])
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kopf.forEach(([k, v], n) => {
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doc.text(350, 82 + n * 13, k, { groesse: 9 })
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doc.text(R, 82 + n * 13, v, { groesse: 9, fett: true, rechts: true })
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})
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// Titel
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y = 190
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doc.text(L, y, storno ? `Stornorechnung zu ${nz(i.bezugNummer)}` : 'Rechnung', { groesse: 16, fett: true })
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y += 22
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const leistung = `Beherbergung ${nz(i.unterkunft?.name)}, ${tag(i.von)}–${tag(i.bis)} (${i.naechte} ${i.naechte === 1 ? 'Nacht' : 'Nächte'}, ${i.personen} ${i.personen === 1 ? 'Person' : 'Personen'})`
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for (const z of doc.umbrechen(leistung, R - L, 10)) {
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doc.text(L, y, z, { groesse: 10 })
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y += 13
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}
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y += 10
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// Posten-Tabelle
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const cMenge = 318
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const cUst = 362
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const cEinzel = 450
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const cBetrag = R
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const textBreite = (klein ? cMenge - 30 : cUst - 40) - L - 20
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const kopfzeile = () => {
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doc.text(L, y, 'Leistung', { groesse: 9, fett: true })
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doc.text(cMenge, y, 'Menge', { groesse: 9, fett: true, rechts: true })
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if (!klein) doc.text(cUst, y, 'USt', { groesse: 9, fett: true, rechts: true })
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doc.text(cEinzel, y, 'Einzelpreis', { groesse: 9, fett: true, rechts: true })
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doc.text(cBetrag, y, 'Betrag', { groesse: 9, fett: true, rechts: true })
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doc.linie(L, y + 4, R, y + 4)
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y += 18
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}
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kopfzeile()
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for (const p of i.posten || []) {
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const zeilen = doc.umbrechen(nz(p.text), textBreite, 10)
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if (y + zeilen.length * 12 > UNTEN) {
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doc.seite()
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y = 70
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kopfzeile()
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}
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const betrag = Math.round(p.menge * p.einzelCent)
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zeilen.forEach((z, k) => doc.text(L, y + k * 12, z, { groesse: 10 }))
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doc.text(cMenge, y, String(p.menge), { groesse: 10, rechts: true })
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if (!klein) doc.text(cUst, y, `${p.ustProzent} %`, { groesse: 10, rechts: true })
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doc.text(cEinzel, y, formatEuro(p.einzelCent), { groesse: 10, rechts: true })
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doc.text(cBetrag, y, formatEuro(betrag), { groesse: 10, rechts: true })
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y += zeilen.length * 12 + 4
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}
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doc.linie(L, y - 2, R, y - 2)
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y += 12
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// Summen (zusammenhaengend auf einer Seite)
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const s = i.summen || {}
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const zeilenSumme = []
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if (klein) {
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zeilenSumme.push(['Gesamtbetrag', formatEuro(s.bruttoCent ?? 0), true])
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} else {
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for (const u of s.ust || []) {
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zeilenSumme.push([`Nettobetrag ${u.satz} %`, formatEuro(u.nettoCent), false])
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zeilenSumme.push([`Enthaltene USt ${u.satz} %`, formatEuro(u.steuerCent), false])
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}
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zeilenSumme.push(['Gesamtbetrag (brutto)', formatEuro(s.bruttoCent ?? 0), true])
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}
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const hinweis = klein ? doc.umbrechen('Gemäß § 19 UStG wird keine Umsatzsteuer berechnet.', R - L, 9) : []
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const zahlText = i.zahlart === 'online' ? 'Zahlart: Online-Zahlung' : i.zahlart === 'vorort' ? 'Zahlart: Zahlung vor Ort' : ''
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const noetig = zeilenSumme.length * 14 + hinweis.length * 12 + 40
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if (y + noetig > UNTEN) {
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doc.seite()
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y = 70
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}
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for (const [k, v, fett] of zeilenSumme) {
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doc.text(cEinzel, y, k, { groesse: 10, fett, rechts: true })
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doc.text(cBetrag, y, v, { groesse: 10, fett, rechts: true })
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y += 14
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}
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y += 8
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for (const z of hinweis) {
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doc.text(L, y, z, { groesse: 9 })
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y += 12
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}
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if (zahlText) {
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y += 4
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doc.text(L, y, zahlText, { groesse: 9 })
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}
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// Fusszeile auf jeder Seite
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const fuss1 = [nz(a.firma), nz(a.inhaber) && `Inh. ${nz(a.inhaber)}`, nz(a.strasse), ortZeile(a)].filter(Boolean).join(' · ')
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const fuss2 = [nz(a.steuernummer) && `Steuernummer ${nz(a.steuernummer)}`, nz(a.ustId) && `USt-IdNr. ${nz(a.ustId)}`, nz(a.email), nz(a.telefon)].filter(Boolean).join(' · ')
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const fuss3 = [nz(a.bank), nz(a.iban) && `IBAN ${nz(a.iban)}`, nz(a.bic) && `BIC ${nz(a.bic)}`].filter(Boolean).join(' · ')
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const n = doc.seitenzahl
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for (let p = 0; p < n; p++) {
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doc.aufSeite(p)
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doc.linie(L, 790, R, 790, { dicke: 0.3 })
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;[fuss1, fuss2, fuss3].filter(Boolean).forEach((z, k) => doc.text(L, 802 + k * 10, z, { groesse: 7.5 }))
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if (n > 1) doc.text(R, 826, `Seite ${p + 1} von ${n}`, { groesse: 7.5, rechts: true })
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}
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return doc.toBuffer()
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}
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Reference in new issue
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