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43 changes: 22 additions & 21 deletions
43
lib/src/main/java/com/androidfung/validator/lib/HkidValidator.kt
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Original file line number | Diff line number | Diff line change |
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@@ -1,30 +1,31 @@ | ||
package com.androidfung.validator.lib | ||
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class HkidValidator { | ||
private val acceptedChars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ " | ||
private val hkidRegex = Regex("[A-Z]{1,2}\\d{6}") | ||
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@ExperimentalStdlibApi | ||
fun isValid(id: String, checksum: Char) : Boolean{ | ||
return try { | ||
calcCheckDigit(id) == checksum | ||
}catch (e : IllegalArgumentException){ | ||
false | ||
} | ||
} | ||
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@ExperimentalStdlibApi | ||
fun calcCheckDigit(input: String): Char { | ||
if (input.matches(hkidRegex)) { | ||
val id = if (input.length == 7) " $input" else input | ||
val sum = id.mapIndexed { index, c -> | ||
(9 - index) * acceptedChars.indexOf(c) | ||
}.sum() | ||
companion object { | ||
private val acceptedChars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ " | ||
private val hkidRegex = Regex("[A-Z]{1,2}\\d{6}") | ||
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val checksum = ((11 - (sum % 11)) % 11) // = (11 * ceil(sum / 11.0) - sum).toInt() | ||
@ExperimentalStdlibApi | ||
fun isValid(id: String, checksum: Char): Boolean { | ||
return try { | ||
calcCheckDigit(id) == checksum | ||
} catch (e: IllegalArgumentException) { | ||
false | ||
} | ||
} | ||
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return checksum.digitToChar(16) | ||
@ExperimentalStdlibApi | ||
fun calcCheckDigit(input: String): Char { | ||
if (input.matches(hkidRegex)) { | ||
val id = if (input.length == 7) " $input" else input | ||
val sum = id.mapIndexed { index, c -> | ||
(9 - index) * acceptedChars.indexOf(c) | ||
}.sum() | ||
val checksum = ((11 - (sum % 11)) % 11) | ||
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} else throw IllegalArgumentException() | ||
return checksum.digitToChar(16) | ||
} else throw IllegalArgumentException() | ||
} | ||
} | ||
} |