Parser for plutus transactions PDF

plutus.scala

val src = """
Card Transaction
CRV*UAB ABUNDO, Vilnius, LT CD 0108 2022/01/12, 18:26 - €1.5
"""

import java.time.LocalDateTime
val Re = """^(.*?)(\d{4})/(\d\d)/(\d\d),\s*(\d\d):(\d\d)\s*(-)?\s*€([\d\\.]+)$""".r
val amounts = src.linesIterator.sliding(2).withPadding("").flatMap { case Seq(prevLine, line) =>
  if (
    line.contains("Card Deposit")
    || line.contains("Load a card with deposit")
  ) None
  else Re.findFirstMatchIn(line).map { m =>
    val description = m.group(1)
    val fullDescription = if (description == "") prevLine else description
    val year = m.group(2)
    val day = m.group(3)
    val month = m.group(4)
    val hour = m.group(5)
    val minute = m.group(6)
    val at = LocalDateTime.of(year.toInt, month.toInt, day.toInt, hour.toInt, minute.toInt)
    val sign = if (m.group(7) == null) 1 else -1
    val amount = m.group(8).toDouble
    (at, fullDescription, sign * amount)
  }
}.toVector.sortBy(_._1)
amounts.foldLeft(0d) { case (current, (at, description, amount)) =>
  val next = current + amount
  println(s"${at.toLocalDate} ${at.toLocalTime} - $description")
  println(f"$current%.2f\t+\t$amount\t=\t$next%.2f")
  println()
  next
}