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Fuegt das nullable Feld section_heading zur ingredient-Tabelle hinzu (Migration 012), erweitert den Ingredient-Typ und aktualisiert alle drei Return-Stellen in parseIngredient. Downstream-Sites (repository, Editor, Tests) bleiben rot – werden in Task 2+ behoben. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
121 lines
3.7 KiB
TypeScript
121 lines
3.7 KiB
TypeScript
import type { Ingredient } from '$lib/types';
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const UNITS = new Set([
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'g',
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'kg',
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'ml',
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'l',
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'cl',
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'dl',
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'TL',
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'EL',
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'Prise',
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'Pck.',
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'Pkg',
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'Becher',
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'Stk',
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'Stück',
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'Bund',
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'Tasse',
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'Dose'
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]);
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const FRACTION_MAP: Record<string, number> = {
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'1/2': 0.5,
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'1/3': 1 / 3,
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'2/3': 2 / 3,
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'1/4': 0.25,
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'3/4': 0.75
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};
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// Vulgar-Fraction-Codepoints — kommen in deutschsprachigen Rezept-Quellen
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// regelmäßig vor (Chefkoch et al. liefern sie vereinzelt, mehr aber bei
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// Apple's Food App, Fork etc.).
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const UNICODE_FRACTION_MAP: Record<string, number> = {
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'\u00BD': 0.5, // ½
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'\u00BC': 0.25, // ¼
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'\u00BE': 0.75, // ¾
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'\u2150': 1 / 7,
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'\u2151': 1 / 9,
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'\u2152': 1 / 10,
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'\u2153': 1 / 3, // ⅓
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'\u2154': 2 / 3, // ⅔
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'\u2155': 0.2, // ⅕
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'\u2156': 0.4, // ⅖
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'\u2157': 0.6, // ⅗
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'\u2158': 0.8, // ⅘
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'\u2159': 1 / 6, // ⅙
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'\u215A': 5 / 6, // ⅚
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'\u215B': 0.125, // ⅛
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'\u215C': 0.375, // ⅜
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'\u215D': 0.625, // ⅝
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'\u215E': 0.875 // ⅞
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};
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// Mengen außerhalb dieses Bereichs sind fast sicher ein Parse-Müll
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// (z. B. Microformat-Date oder Telefon-Nummer in einem JSON-LD-Quantity-
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// Feld). Wir geben null zurück, raw_text bleibt für die UI erhalten.
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const MAX_REASONABLE_QTY = 10000;
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function clampQuantity(n: number | null): number | null {
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if (n === null || !Number.isFinite(n)) return null;
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if (n <= 0) return null;
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if (n > MAX_REASONABLE_QTY) return null;
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return n;
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}
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function parseQuantity(raw: string): number | null {
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const trimmed = raw.trim();
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if (FRACTION_MAP[trimmed] !== undefined) return FRACTION_MAP[trimmed];
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const rangeMatch = /^(\d+[.,]?\d*)\s*[-–]\s*\d+[.,]?\d*$/.exec(trimmed);
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if (rangeMatch) {
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return parseFloat(rangeMatch[1].replace(',', '.'));
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}
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const num = parseFloat(trimmed.replace(',', '.'));
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return Number.isFinite(num) ? num : null;
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}
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// Splits "TL Salz" → unit "TL", name "Salz"; "Zitrone" → unit null, name "Zitrone".
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function splitUnitAndName(rest: string): { unit: string | null; name: string } {
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const trimmed = rest.trim();
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const firstTokenMatch = /^(\S+)\s+(.+)$/.exec(trimmed);
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if (firstTokenMatch && UNITS.has(firstTokenMatch[1])) {
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return { unit: firstTokenMatch[1], name: firstTokenMatch[2].trim() };
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}
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return { unit: null, name: trimmed };
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}
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export function parseIngredient(raw: string, position = 0): Ingredient {
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const rawText = raw.trim();
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let working = rawText;
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let note: string | null = null;
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const noteMatch = /\(([^)]+)\)/.exec(working);
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if (noteMatch) {
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note = noteMatch[1].trim();
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working = (
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working.slice(0, noteMatch.index) + working.slice(noteMatch.index + noteMatch[0].length)
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).trim();
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}
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// Unicode-Bruch am Anfang? Dann das eine Zeichen als Menge nehmen
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// und den Rest wie üblich in Unit + Name aufteilen.
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const firstChar = working.charAt(0);
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if (UNICODE_FRACTION_MAP[firstChar] !== undefined) {
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const tail = working.slice(1).trimStart();
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if (tail.length > 0) {
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const quantity = clampQuantity(UNICODE_FRACTION_MAP[firstChar]);
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const { unit, name } = splitUnitAndName(tail);
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return { position, quantity, unit, name, note, raw_text: rawText, section_heading: null };
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}
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}
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const qtyPattern = /^((?:\d+[.,]?\d*(?:\s*[-–]\s*\d+[.,]?\d*)?)|(?:\d+\/\d+))\s+(.+)$/;
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const qtyMatch = qtyPattern.exec(working);
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if (!qtyMatch) {
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return { position, quantity: null, unit: null, name: working, note, raw_text: rawText, section_heading: null };
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}
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const quantity = clampQuantity(parseQuantity(qtyMatch[1]));
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const { unit, name } = splitUnitAndName(qtyMatch[2]);
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return { position, quantity, unit, name, note, raw_text: rawText, section_heading: null };
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}
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