Day 2 Part 1 complete

lib/day2/command.dart

@@ -33,13 +33,31 @@ class Day2Command extends Command {
     print("Parsing file: $filePath");
 
     var inputFile = File(filePath);
-    var openFile = inputFile.openRead();
-
-    var lines = openFile.transform(utf8.decoder).transform(LineSplitter());
-
-    await for (var line in lines) {
-      print(line);
-      print('-------');
-    }
+    var openFile = await inputFile.readAsString();
+    var part1Answer = openFile
+        .trim()
+        .split(',')
+        .expand((range) {
+          var extents = range.split('-');
+          if (extents.length != 2) {
+            throw Exception(
+              "Expected range with 2 parts, but got ${extents.length} parts: {range}",
+            );
+          }
+          var numRange = [int.parse(extents[0]), int.parse(extents[1])];
+          List<int> createRange(int from, int to) =>
+              List.generate(to - from + 1, (i) => i + from);
+          return createRange(numRange[0], numRange[1]);
+        })
+        .map((id) => id.toString())
+        .where((id) => id.length.isEven)
+        .where((id) {
+          var first_half = id.substring(0, (id.length / 2).floor());
+          var second_half = id.substring((id.length / 2).floor(), id.length);
+          return first_half == second_half;
+        })
+        .map((id) => int.parse(id))
+        .reduce((id1, id2) => id1 + id2);
+    print("Part 1 Answer: $part1Answer");
   }
 }