41 lines
1.4 KiB
Kotlin
41 lines
1.4 KiB
Kotlin
package com.android.trisolarisserver.component
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internal fun formatAadhaar(value: String): String {
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if (value.length != 12) return value
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return value.chunked(4).joinToString(" ")
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}
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internal fun isValidAadhaar(value: String): Boolean {
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if (value.length != 12 || !value.all { it.isDigit() }) return false
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var c = 0
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val reversed = value.reversed()
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for (i in reversed.indices) {
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val digit = reversed[i].digitToInt()
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c = aadhaarMultiplication[c][aadhaarPermutation[i % 8][digit]]
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}
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return c == 0
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}
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private val aadhaarMultiplication = arrayOf(
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intArrayOf(0, 1, 2, 3, 4, 5, 6, 7, 8, 9),
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intArrayOf(1, 2, 3, 4, 0, 6, 7, 8, 9, 5),
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intArrayOf(2, 3, 4, 0, 1, 7, 8, 9, 5, 6),
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intArrayOf(3, 4, 0, 1, 2, 8, 9, 5, 6, 7),
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intArrayOf(4, 0, 1, 2, 3, 9, 5, 6, 7, 8),
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intArrayOf(5, 9, 8, 7, 6, 0, 4, 3, 2, 1),
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intArrayOf(6, 5, 9, 8, 7, 1, 0, 4, 3, 2),
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intArrayOf(7, 6, 5, 9, 8, 2, 1, 0, 4, 3),
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intArrayOf(8, 7, 6, 5, 9, 3, 2, 1, 0, 4),
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intArrayOf(9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
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)
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private val aadhaarPermutation = arrayOf(
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intArrayOf(0, 1, 2, 3, 4, 5, 6, 7, 8, 9),
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intArrayOf(1, 5, 7, 6, 2, 8, 3, 0, 9, 4),
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intArrayOf(5, 8, 0, 3, 7, 9, 6, 1, 4, 2),
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intArrayOf(8, 9, 1, 6, 0, 4, 3, 5, 2, 7),
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intArrayOf(9, 4, 5, 3, 1, 2, 6, 8, 7, 0),
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intArrayOf(4, 2, 8, 6, 5, 7, 3, 9, 0, 1),
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intArrayOf(2, 7, 9, 3, 8, 0, 6, 4, 1, 5),
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intArrayOf(7, 0, 4, 6, 9, 1, 3, 2, 5, 8)
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)
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