Razmig Sarkissian
4 months ago
parent
69c0163ccb
commit
331103c4c0
@ -0,0 +1,59 @@ |
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import Foundation |
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func areFrenchPhoneNumbersSimilar(_ phoneNumber1: String?, _ phoneNumber2: String?) -> Bool { |
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if phoneNumber1?.canonicalVersion == phoneNumber2?.canonicalVersion { |
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return true |
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} |
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// Helper function to normalize a phone number, now returning an optional String |
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func normalizePhoneNumber(_ numberString: String?) -> String? { |
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// 1. Safely unwrap the input string. If it's nil or empty, return nil immediately. |
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guard let numberString = numberString, !numberString.isEmpty else { |
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return nil |
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} |
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// 2. Remove all non-digit characters |
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let digitsOnly = numberString.filter(\.isNumber) |
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// If after filtering, there are no digits, return nil. |
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guard !digitsOnly.isEmpty else { |
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return nil |
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} |
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// 3. Handle French specific prefixes and extract the relevant part |
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// We need at least 9 digits to get a meaningful 8-digit comparison from the end |
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if digitsOnly.count >= 9 { |
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if digitsOnly.hasPrefix("0") { |
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return String(digitsOnly.suffix(9)) |
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} else if digitsOnly.hasPrefix("33") { |
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// Ensure there are enough digits after dropping "33" |
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if digitsOnly.count >= 11 { // "33" + 9 digits = 11 |
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return String(digitsOnly.dropFirst(2).suffix(9)) |
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} else { |
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return nil // Not enough digits after dropping "33" |
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} |
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} else if digitsOnly.count == 9 { // Case like 612341234 |
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return digitsOnly |
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} else { // More digits but no 0 or 33 prefix, take the last 9 |
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return String(digitsOnly.suffix(9)) |
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} |
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} |
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return nil // If it doesn't fit the expected patterns or is too short |
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} |
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// Normalize both phone numbers. If either results in nil, we can't compare. |
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guard let normalizedNumber1 = normalizePhoneNumber(phoneNumber1), |
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let normalizedNumber2 = normalizePhoneNumber(phoneNumber2) else { |
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return false |
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} |
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// Ensure both normalized numbers have at least 8 digits before comparing suffixes |
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guard normalizedNumber1.count >= 8 && normalizedNumber2.count >= 8 else { |
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return false // One or both numbers are too short to have 8 comparable digits |
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} |
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// Compare the last 8 digits |
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return normalizedNumber1.suffix(8) == normalizedNumber2.suffix(8) |
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} |
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