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c09f67c | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 | import type { z } from "zod/v4";
import type { invoiceSchema, receiptSchema } from "../schema";
type InvoiceData = z.infer<typeof invoiceSchema>;
type ReceiptData = z.infer<typeof receiptSchema>;
export interface DocumentFormat {
numberFormat: "us" | "european"; // 1,234.56 vs 1.234,56
dateFormat: "us" | "european" | "iso"; // MM/DD/YYYY vs DD/MM/YYYY vs YYYY-MM-DD
language: string | null;
currency: string | null;
taxTerm: "vat" | "sales_tax" | "gst" | "unknown";
}
/**
* Detect document format from extracted data
*/
export function detectInvoiceFormat(data: InvoiceData): DocumentFormat {
const format: DocumentFormat = {
numberFormat: "us",
dateFormat: "iso",
language: data.language,
currency: data.currency,
taxTerm: "unknown",
};
// Detect number format from amounts
// This is tricky without seeing the original document, but we can infer from context
// European formats often use comma as decimal separator
// We'll default to US format unless we have strong indicators
// Detect date format from invoice_date
if (data.invoice_date) {
const dateParts = data.invoice_date.split("-");
if (dateParts.length === 3) {
// We always normalize to ISO format, so dateFormat detection is based on language/currency
format.dateFormat = "iso";
}
}
// Detect tax term from tax_type
if (data.tax_type) {
// Map tax types to our format categories
if (
data.tax_type === "vat" ||
data.tax_type === "sales_tax" ||
data.tax_type === "gst"
) {
format.taxTerm = data.tax_type;
} else {
format.taxTerm = "unknown";
}
} else {
// Infer from currency/language
if (
data.currency === "EUR" ||
data.language === "german" ||
data.language === "french"
) {
format.taxTerm = "vat";
} else if (data.currency === "USD" || data.currency === "CAD") {
format.taxTerm = "sales_tax";
} else if (data.currency === "AUD" || data.currency === "NZD") {
format.taxTerm = "gst";
}
}
// Detect number format from currency
// European currencies often use European number format
const europeanCurrenciesReceipt = ["EUR", "SEK", "DKK", "NOK", "PLN", "CZK"];
if (data.currency && europeanCurrenciesReceipt.includes(data.currency)) {
format.numberFormat = "european";
}
// Detect date format from language
// European languages often use DD/MM/YYYY
const europeanLanguages = [
"german",
"french",
"spanish",
"italian",
"portuguese",
"swedish",
"danish",
"norwegian",
];
if (data.language && europeanLanguages.includes(data.language)) {
format.dateFormat = "european";
}
return format;
}
/**
* Detect document format from extracted receipt data
*/
export function detectReceiptFormat(data: ReceiptData): DocumentFormat {
const format: DocumentFormat = {
numberFormat: "us",
dateFormat: "iso",
language: data.language,
currency: data.currency,
taxTerm: "unknown",
};
// Detect tax term from tax_type
if (data.tax_type) {
// Map tax types to our format categories
if (
data.tax_type === "vat" ||
data.tax_type === "sales_tax" ||
data.tax_type === "gst"
) {
format.taxTerm = data.tax_type;
} else {
format.taxTerm = "unknown";
}
} else {
// Infer from currency/language
if (
data.currency === "EUR" ||
data.language === "german" ||
data.language === "french"
) {
format.taxTerm = "vat";
} else if (data.currency === "USD" || data.currency === "CAD") {
format.taxTerm = "sales_tax";
} else if (data.currency === "AUD" || data.currency === "NZD") {
format.taxTerm = "gst";
}
}
// Detect number format from currency
const europeanCurrenciesReceipt = ["EUR", "SEK", "DKK", "NOK", "PLN", "CZK"];
if (data.currency && europeanCurrenciesReceipt.includes(data.currency)) {
format.numberFormat = "european";
}
// Detect date format from language
const europeanLanguages = [
"german",
"french",
"spanish",
"italian",
"portuguese",
"swedish",
"danish",
"norwegian",
];
if (data.language && europeanLanguages.includes(data.language)) {
format.dateFormat = "european";
}
return format;
}
/**
* Get format-specific prompt hints
*/
export function getFormatSpecificHints(format: DocumentFormat): string {
const hints: string[] = [];
if (format.numberFormat === "european") {
hints.push(
"NUMBER FORMAT: This document uses European number format (1.234,56). Use comma as decimal separator and period as thousands separator.",
);
}
if (format.dateFormat === "european") {
hints.push(
"DATE FORMAT: This document likely uses European date format (DD/MM/YYYY). Convert to YYYY-MM-DD.",
);
}
if (format.taxTerm === "vat") {
hints.push(
"TAX TERM: This document uses VAT (Value Added Tax). Look for 'VAT', 'MwSt', 'TVA', 'IVA' labels.",
);
} else if (format.taxTerm === "sales_tax") {
hints.push(
"TAX TERM: This document uses Sales Tax. Look for 'Sales Tax', 'Tax' labels.",
);
} else if (format.taxTerm === "gst") {
hints.push(
"TAX TERM: This document uses GST (Goods and Services Tax). Look for 'GST' labels.",
);
}
return hints.join("\n");
}
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