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

   1 /*
   2  Copyright (C) 2024 Rubén Beltrán del Río
   3
   4  This program is free software: you can redistribute it and/or modify
   5  it under the terms of the GNU General Public License as published by
   6  the Free Software Foundation, either version 3 of the License, or
   7  (at your option) any later version.
   8
   9  This program is distributed in the hope that it will be useful,
  10  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  GNU General Public License for more details.
  13
  14  You should have received a copy of the GNU General Public License
  15  along with this program. If not, see https://map.tranquil.systems.
  16  */
  17 import Foundation
  18
  19 struct GroupParserStrategy: MapParserStrategy {
  20   private let regex = MapParsingPatterns.group
  21
  22   func canHandle(line: String) -> Bool {
  23     let range = NSRange(location: 0, length: line.utf16.count)
  24     let matches = regex.matches(in: String(line), options: [], range: range)
  25     return matches.count > 0 && matches[0].numberOfRanges == 3
  26   }
  27
  28   func handle(index: Int, line: String, vertices: [String: Vertex]) -> (Any.Type, Any) {
  29     let range = NSRange(location: 0, length: line.utf16.count)
  30     let matches = regex.matches(in: String(line), options: [], range: range)
  31
  32     let match = matches[0]
  33     var groupVertices: [Vertex] = []
  34     let vertexIdString = String(line[Range(match.range(at: 2), in: line)!])
  35     let vertexIds = vertexIdString.split(separator: " ", omittingEmptySubsequences: true).map(
  36       String.init)
  37
  38     for vertexId in vertexIds {
  39       if let vertex = vertices[vertexId] {
  40         groupVertices.append(vertex)
  41       }
  42     }
  43
  44     if groupVertices.count > 0 {
  45       return ([Vertex].self, groupVertices)
  46     }
  47
  48     return (NSObject.self, NSObject())
  49   }
  50 }