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Improve IBAN recognition on device #782

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Original file line number Diff line number Diff line change
Expand Up @@ -70,30 +70,6 @@
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Expand All @@ -120,6 +96,8 @@
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Expand Down Expand Up @@ -1333,7 +1311,6 @@
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Expand All @@ -1344,20 +1321,12 @@
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Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -6,13 +6,39 @@

import Foundation

func extractIBANS(string: String) -> [String] {
var results = [String]()
var prefferedIBANs = [String]()
private func extractIBANMatches(from string: String) -> [NSTextCheckingResult] {
let stringRange = NSRange(location: 0, length: string.count)
let allIBANs = IBANKnowledge().universalIBANRegex.matches(in: string, options: [], range: stringRange)
let iBANsInBlocks = IBANKnowledge().ibanInBlocksRegex.matches(in: string, options: [], range: stringRange)
let matches = allIBANs + iBANsInBlocks
return allIBANs + iBANsInBlocks
}

func extractIBANS(string: String) -> [String] {
var results = [String]()
var prefferedIBANs = [String]()
var matches = extractIBANMatches(from: string)

// try to fix invalid strings
if matches.isEmpty, string.count > 2 {
var number = String(string.dropFirst(2))

number = number.replacingOccurrences(of: "s", with: "5")
number = number.replacingOccurrences(of: "S", with: "5")
number = number.replacingOccurrences(of: "I", with: "1")
number = number.replacingOccurrences(of: "i", with: "1")
number = number.replacingOccurrences(of: "l", with: "1")
number = number.replacingOccurrences(of: "T", with: "1")
number = number.replacingOccurrences(of: "o", with: "0")
number = number.replacingOccurrences(of: "O", with: "0")
number = number.replacingOccurrences(of: "Q", with: "0")
number = number.replacingOccurrences(of: "B", with: "8")
number = number.replacingOccurrences(of: "Z", with: "7")
number = number.replacingOccurrences(of: "z", with: "7")
number = number.trimmingCharacters(in: .whitespaces)
number = number.replacingOccurrences(of: ",", with: "")
number = number.replacingOccurrences(of: ".", with: "")
matches = extractIBANMatches(from: String(string.prefix(2)) + number)
}
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Hi @igor-gini , Everything looks good to me, just a small suggestion,
We observed in android that sometimes
8 is recognized as B,
7 is recognized as Z,
I think it would be good if you can add these cases as well, If you did not saw any pattern like this in IOS then it is fine as well.
Just for your information here is the android PR link if you want to have a look :)
gini/gini-mobile-android#645

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Added today, thank you for your review!


for match in matches {
if let range = Range(match.range, in: string) {
Expand Down