git.r.bdr.sh - rbdr/map/blob - Map/Logic/MapParser/Strategies/GroupParserStrategy.swift

   1 import Foundation
   2
   3 struct GroupParserStrategy: MapParserStrategy {
   4   private let regex = MapParsingPatterns.group
   5
   6   func canHandle(line: String) -> Bool {
   7     let range = NSRange(location: 0, length: line.utf16.count)
   8     let matches = regex.matches(in: String(line), options: [], range: range)
   9     return matches.count > 0 && matches[0].numberOfRanges == 3
  10   }
  11
  12   func handle(index: Int, line: String, vertices: [String: Vertex]) -> (Any.Type, Any) {
  13     let range = NSRange(location: 0, length: line.utf16.count)
  14     let matches = regex.matches(in: String(line), options: [], range: range)
  15
  16     let match = matches[0]
  17     var groupVertices: [Vertex] = []
  18     let vertexIdString = String(line[Range(match.range(at: 2), in: line)!])
  19     let vertexIds = vertexIdString.split(separator: " ", omittingEmptySubsequences: true).map(
  20       String.init)
  21
  22     for vertexId in vertexIds {
  23       if let vertex = vertices[vertexId] {
  24         groupVertices.append(vertex)
  25       }
  26     }
  27
  28     if groupVertices.count > 0 {
  29       return ([Vertex].self, groupVertices)
  30     }
  31
  32     return (NSObject.self, NSObject())
  33   }
  34 }