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

   1 import Foundation
   2
   3 struct VertexParserStrategy: MapParserStrategy {
   4   private let regex = MapParsingPatterns.vertex
   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 >= 4
  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     let key = String(line[Range(match.range(at: 1), in: line)!])
  18     let xString = String(line[Range(match.range(at: 2), in: line)!])
  19     let yString = String(line[Range(match.range(at: 3), in: line)!])
  20     let x = CGFloat(truncating: NumberFormatter().number(from: xString) ?? 0.0)
  21     let y = CGFloat(truncating: NumberFormatter().number(from: yString) ?? 0.0)
  22
  23     var vertex = Vertex(
  24       id: index,
  25       label: key,
  26       position: CGPoint(x: x, y: y)
  27     )
  28
  29     if let range = Range(match.range(at: 4), in: line) {
  30       let shapeString = String(line[range])
  31       vertex.shape = VertexShape(rawValue: shapeString.lowercased()) ?? .circle
  32     }
  33
  34     return (Vertex.self, vertex)
  35   }
  36 }