58 lines
2.1 KiB
JavaScript
58 lines
2.1 KiB
JavaScript
/**
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* Ingredient density table for automatic weight/volume conversion.
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*
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* Each entry has keywords (ingredient names) and a density in g/ml.
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* Conversion:
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* Weight -> Volume: ml = grams / density
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* Volume -> Weight: grams = ml * density
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*
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* Entries are sorted longest-keyword-first so that "brown sugar" matches
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* before "sugar", "olive oil" before "oil", etc.
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*/
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const DENSITIES = [
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{ keywords: ['all-purpose flour', 'all purpose flour', 'ap flour'], density: 0.53 },
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{ keywords: ['powdered sugar', 'confectioners sugar', 'icing sugar'], density: 0.50 },
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{ keywords: ['vanilla extract'], density: 1.03 },
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{ keywords: ['baking powder'], density: 0.90 },
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{ keywords: ['cocoa powder'], density: 0.43 },
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{ keywords: ['brown sugar'], density: 0.93 },
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{ keywords: ['maple syrup'], density: 1.32 },
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{ keywords: ['baking soda', 'bicarbonate'], density: 1.10 },
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{ keywords: ['bread flour'], density: 0.55 },
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{ keywords: ['sour cream'], density: 1.05 },
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{ keywords: ['olive oil'], density: 0.92 },
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{ keywords: ['cornstarch', 'corn starch'], density: 0.54 },
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{ keywords: ['butter'], density: 0.96 },
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{ keywords: ['cream'], density: 1.01 },
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{ keywords: ['flour'], density: 0.53 },
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{ keywords: ['sugar'], density: 0.85 },
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{ keywords: ['honey'], density: 1.42 },
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{ keywords: ['milk'], density: 1.03 },
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{ keywords: ['water'], density: 1.0 },
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{ keywords: ['salt'], density: 1.22 },
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{ keywords: ['rice'], density: 0.80 },
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{ keywords: ['oil'], density: 0.92 },
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];
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/**
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* Check if text contains a known ingredient and return its density.
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* Lowercases the text and checks keywords longest-first.
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*
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* @param {string} text - text preceding the measurement (ingredient context)
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* @returns {number|null} density in g/ml, or null if no match
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*/
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function matchDensity(text) {
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if (!text) return null;
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const lower = text.toLowerCase().trim();
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for (const entry of DENSITIES) {
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for (const keyword of entry.keywords) {
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if (lower.includes(keyword)) {
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return entry.density;
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}
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}
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}
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return null;
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}
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module.exports = { DENSITIES, matchDensity };
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