root
55 lines
1.6 KiB
TypeScript
55 lines
1.6 KiB
TypeScript
/** Göteborg municipality postcodes used for delivery validation. */
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const GOTHENBURG_POSTCODE_PREFIXES = ['41', '42', '43'] as const;
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const GOTHENBURG_NAME_PATTERNS = [
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'göteborg',
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'gothenburg',
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'goteborg',
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'göteborgs stad',
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'goteborgs stad',
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] as const;
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export interface DeliverableAddressFields {
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city?: string;
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municipality?: string;
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postcode?: string;
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countryCode?: string;
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formatted?: string;
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}
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function normalize(value: string): string {
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return value.trim().toLowerCase();
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}
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function matchesGothenburgName(value: string): boolean {
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const normalized = normalize(value);
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return GOTHENBURG_NAME_PATTERNS.some((pattern) => normalized.includes(pattern));
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}
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function hasGothenburgPostcode(postcode?: string): boolean {
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if (!postcode) return false;
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const digits = postcode.replace(/\s/g, '');
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return GOTHENBURG_POSTCODE_PREFIXES.some((prefix) => digits.startsWith(prefix));
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}
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export function isGothenburgDeliveryAddress(fields: DeliverableAddressFields): boolean {
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if (fields.countryCode && normalize(fields.countryCode) !== 'se') return false;
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if (matchesGothenburgName(fields.city ?? '')) return true;
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if (matchesGothenburgName(fields.municipality ?? '')) return true;
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if (hasGothenburgPostcode(fields.postcode)) return true;
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const formatted = normalize(fields.formatted ?? '');
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if (
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formatted.includes('göteborg') ||
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formatted.includes('gothenburg') ||
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formatted.includes('goteborg')
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) {
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return (
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hasGothenburgPostcode(fields.postcode) ||
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/\b41\d{3}\b|\b42\d{3}\b|\b43\d{3}\b/.test(formatted)
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);
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}
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return false;
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} |