Created
August 19, 2018 17:19
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Import utilities for Indian bank statements into Abandon's shorthand format.
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#!scala -save | |
!# | |
// From https://stackoverflow.com/questions/32488364/ | |
object Parser { | |
def fromLine(line: String): List[String] = { | |
def recursive( | |
lineRemaining: String | |
, isWithinDoubleQuotes: Boolean | |
, valueAccumulator: String | |
, accumulator: List[String] | |
): List[String] = { | |
if (lineRemaining.isEmpty) | |
valueAccumulator :: accumulator | |
else | |
if (lineRemaining.head == '"') | |
if (isWithinDoubleQuotes) | |
if (lineRemaining.tail.nonEmpty && lineRemaining.tail.head == '"') | |
//escaped double quote | |
recursive(lineRemaining.drop(2), true, valueAccumulator + '"', accumulator) | |
else | |
//end of double quote pair (ignore whatever's between here and the next comma) | |
recursive(lineRemaining.dropWhile(_ != ','), false, valueAccumulator, accumulator) | |
else | |
//start of a double quote pair (ignore whatever's in valueAccumulator) | |
recursive(lineRemaining.drop(1), true, "", accumulator) | |
else | |
if (isWithinDoubleQuotes) | |
//scan to next double quote | |
recursive( | |
lineRemaining.dropWhile(_ != '"') | |
, true | |
, valueAccumulator + lineRemaining.takeWhile(_ != '"') | |
, accumulator | |
) | |
else | |
if (lineRemaining.head == ',') | |
//advance to next field value | |
recursive( | |
lineRemaining.drop(1) | |
, false | |
, "" | |
, valueAccumulator :: accumulator | |
) | |
else | |
//scan to next double quote or comma | |
recursive( | |
lineRemaining.dropWhile(char => (char != '"') && (char != ',')) | |
, false | |
, valueAccumulator + lineRemaining.takeWhile(char => (char != '"') && (char != ',')) | |
, accumulator | |
) | |
} | |
if (line.nonEmpty) | |
recursive(line, false, "", Nil).reverse | |
else | |
Nil | |
} | |
def fromLines(lines: List[String]): List[List[String]] = | |
lines.map(fromLine) | |
} | |
val fileName=args(0) | |
println("Importing from " + fileName) | |
case class EntryDate(year: String, month: String, day: String) { | |
val monthName = month.toInt match { | |
case 1 => "jan" | |
case 2 => "feb" | |
case 3 => "mar" | |
case 4 => "apr" | |
case 5 => "may" | |
case 6 => "jun" | |
case 7 => "jul" | |
case 8 => "aug" | |
case 9 => "sep" | |
case 10 => "oct" | |
case 11 => "nov" | |
case 12 => "dec" | |
} | |
def toLedgerFormat = s"$year/$monthName/$day" | |
} | |
case class Entry(date: EntryDate, amount: BigDecimal, narration: String) { | |
val account = if ((amount < 0) && (narration.startsWith("EAW") || narration.startsWith("ATW"))) { | |
"Drawings" | |
} else { | |
if (amount > 0) "Income:Suspense" else "Expense:Suspense" | |
} | |
def toLedgerFormat = f". ${date.toLedgerFormat} ${account}%-30s ${amount}%,15.2f ; $narration" | |
} | |
def parseDate(s:String) = { | |
val fields = s.split("/") | |
val year = "20" + fields(2).trim | |
val month = fields(1).trim | |
val day = fields(0).trim | |
EntryDate(year, month, day) | |
} | |
val lines = io.Source.fromFile(fileName).getLines.toList | |
val entries = lines.flatMap { l => | |
val fields = Parser.fromLine(l).map(_.trim) | |
if (fields.size > 1) { | |
val narration = fields(1) | |
val entryOpt = util.Try(parseDate(fields(2))).map(valueDate => { | |
val debitAmount = BigDecimal(fields(3)) | |
val creditAmount = BigDecimal(fields(4)) | |
val amount = if (debitAmount > creditAmount) { | |
-debitAmount | |
} else { | |
creditAmount | |
} | |
Entry(valueDate, amount, narration) | |
}).toOption | |
if (entryOpt.isEmpty) { | |
println("Problem with " + l) | |
} | |
entryOpt | |
} else { | |
None | |
} | |
}.toList | |
println(entries.map(_.toLedgerFormat).mkString("\n")) | |
println("num entries: " + entries.size + " / " + lines.size) |
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