1 files changed, 34 insertions, 0 deletions
diff --git a/Map/Logic/MapParser/Strategies/GroupParserStrategy.swift b/Map/Logic/MapParser/Strategies/GroupParserStrategy.swift
new file mode 100644
index 0000000..7924935
--- /dev/null
+++ b/Map/Logic/MapParser/Strategies/GroupParserStrategy.swift
@@ -0,0 +1,34 @@
+import Foundation
+
+struct GroupParserStrategy: MapParserStrategy {
+  private let regex = MapParsingPatterns.group
+
+  func canHandle(line: String) -> Bool {
+    let range = NSRange(location: 0, length: line.utf16.count)
+    let matches = regex.matches(in: String(line), options: [], range: range)
+    return matches.count > 0 && matches[0].numberOfRanges == 3
+  }
+
+  func handle(index: Int, line: String, vertices: [String: Vertex]) -> (Any.Type, Any) {
+    let range = NSRange(location: 0, length: line.utf16.count)
+    let matches = regex.matches(in: String(line), options: [], range: range)
+
+    let match = matches[0]
+    var groupVertices: [Vertex] = []
+    let vertexIdString = String(line[Range(match.range(at: 2), in: line)!])
+    let vertexIds = vertexIdString.split(separator: " ", omittingEmptySubsequences: true).map(
+      String.init)
+
+    for vertexId in vertexIds {
+      if let vertex = vertices[vertexId] {
+        groupVertices.append(vertex)
+      }
+    }
+
+    if groupVertices.count > 0 {
+      return ([Vertex].self, groupVertices)
+    }
+
+    return (NSObject.self, NSObject())
+  }
+}