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package com.rockymadden.stringmetric
object Transform {
import scala.collection.immutable.NumericRange
type Transform[A] = (A => A)
type StringTransform = Transform[Array[Char]]
object StringTransform {
private val Ascii = NumericRange(0x00, 0x7F, 1)
private val ExtendedAscii = NumericRange(0x00, 0x7F, 1)
private val Latin = NumericRange(0x00, 0x24F, 1)
private val LowerCase = NumericRange(0x61, 0x7A, 1)
private val Numbers = NumericRange(0x30, 0x39, 1)
private val UpperCase = NumericRange(0x41, 0x5A, 1)
private val filter: ((Array[Char], (Char => Boolean)) => String) = (ca, f) =>
ca.filter(c => f(c)).mkString
private val filterNot: ((Array[Char], (Char => Boolean)) => String) = (ca, f) =>
ca.filterNot(c => f(c)).mkString
val filterAlpha: StringTransform = (ca) => filter(ca, c => {
val ci = c.toInt
LowerCase.contains(ci) || UpperCase.contains(ci)
})
val filterNotAlpha: StringTransform = (ca) => filterNot(ca, c => {
val ci = c.toInt
LowerCase.contains(ci) || UpperCase.contains(ci)
})
val filterAlphaNumeric: StringTransform = (ca) => filter(ca, c => {
val ci = c.toInt
LowerCase.contains(ci) || UpperCase.contains(ci) || Numbers.contains(ci)
})
val filterNotAlphaNumeric: StringTransform = (ca) => filterNot(ca, c => {
val ci = c.toInt
LowerCase.contains(ci) || UpperCase.contains(ci) || Numbers.contains(ci)
})
val filterAscii: StringTransform = (ca) => filter(ca, c => Ascii.contains(c.toInt))
val filterNotAscii: StringTransform = (ca) => filterNot(ca, c => Ascii.contains(c.toInt))
val filterExtendedAscii: StringTransform = (ca) => filter(ca, c => ExtendedAscii.contains(c.toInt))
val filterNotExtendedAscii: StringTransform = (ca) => filterNot(ca, c => ExtendedAscii.contains(c.toInt))
val filterLatin: StringTransform = (ca) => filter(ca, c => Latin.contains(c.toInt))
val filterNotLatin: StringTransform = (ca) => filterNot(ca, c => Latin.contains(c.toInt))
val filterLowerCase: StringTransform = (ca) => filter(ca, c => LowerCase.contains(c.toInt))
val filterNotLowerCase: StringTransform = (ca) => filterNot(ca, c => LowerCase.contains(c.toInt))
val filterNumeric: StringTransform = (ca) => filter(ca, c => Numbers.contains(c.toInt))
val filterNotNumeric: StringTransform = (ca) => filterNot(ca, c => Numbers.contains(c.toInt))
val filterUpperCase: StringTransform = (ca) => filter(ca, c => UpperCase.contains(c.toInt))
val filterNotUpperCase: StringTransform = (ca) => filterNot(ca, c => UpperCase.contains(c.toInt))
val ignoreAlphaCase: StringTransform = (ca) => ca.map(c => if (c >= 65 && c <= 90) (c + 32).toChar else c)
}
}
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