Solved day04 part 1

Author: Gentleman1983

build.gradle

@@ -4,7 +4,7 @@ plugins {
 
 // project meta data
 group 'de.havox_design.aoc2023'
-version '0.3.4'
+version '0.4.2'
 
 // Switch to gradle "all" distribution.
 wrapper {

day04/src/main/kotlin/de/havox_design/aoc2023/day04/Day04.kt

@@ -2,7 +2,10 @@ package de.havox_design.aoc2023.day04
 
 class Day04(private var filename: String) {
     fun solvePart1(): Long =
-        13L
+        getResourceAsText(filename)
+            .filter(String::isNotBlank)
+            .map { ScratchCard.from(it) }
+            .sumOf { it.scoreV1() }
 
     fun solvePart2(): Long =
         0L

day04/src/main/kotlin/de/havox_design/aoc2023/day04/ScratchCard.kt

@@ -0,0 +1,36 @@
+package de.havox_design.aoc2023.day04
+
+data class ScratchCard(val winningNumbers: List<Int>, val playerNumbers: List<Int>) {
+    fun scoreV1(): Long {
+        var score = 0L
+        playerNumbers
+            .forEach { number ->
+            if (number in winningNumbers && score == 0L) {
+                score = 1L
+            } else if (number in winningNumbers) {
+                score *= 2
+            }
+        }
+        return score
+    }
+
+    companion object {
+        private const val NAME_END_DELIMITER: String = ":"
+        private const val DATA_DELIMITER: String = "|"
+        private const val VALUE_DELIMITER: String = " "
+
+        fun from(entry: String) = ScratchCard(
+            winningNumbers = entry
+                .substringAfter(NAME_END_DELIMITER)
+                .substringBefore(DATA_DELIMITER)
+                .split(VALUE_DELIMITER)
+                .filter(String::isNotBlank)
+                .map(String::toInt),
+            playerNumbers = entry
+                .substringAfter(DATA_DELIMITER)
+                .split(VALUE_DELIMITER)
+                .filter(String::isNotBlank)
+                .map(String::toInt),
+        )
+    }
+}