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[rbdr/map] / Map / Logic / MapParser / Strategies / GroupParserStrategy.swift
1 // Copyright (C) 2024 Rubén Beltrán del Río
2
3 // This program is free software: you can redistribute it and/or modify
4 // it under the terms of the GNU General Public License as published by
5 // the Free Software Foundation, either version 3 of the License, or
6 // (at your option) any later version.
7
8 // This program is distributed in the hope that it will be useful,
9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 // GNU General Public License for more details.
12
13 // You should have received a copy of the GNU General Public License
14 // along with this program. If not, see https://map.tranquil.systems.
15 import Foundation
16
17 struct GroupParserStrategy: MapParserStrategy {
18 private let regex = MapParsingPatterns.group
19
20 func canHandle(line: String) -> Bool {
21 let range = NSRange(location: 0, length: line.utf16.count)
22 let matches = regex.matches(in: String(line), options: [], range: range)
23 return matches.count > 0 && matches[0].numberOfRanges == 3
24 }
25
26 func handle(index: Int, line: String, vertices: [String: Vertex]) -> (Any.Type, Any) {
27 let range = NSRange(location: 0, length: line.utf16.count)
28 let matches = regex.matches(in: String(line), options: [], range: range)
29
30 let match = matches[0]
31 var groupVertices: [Vertex] = []
32 let vertexIdString = String(line[Range(match.range(at: 2), in: line)!])
33 let vertexIds = vertexIdString.split(separator: ",", omittingEmptySubsequences: true).map(
34 String.init
35 ).map({ vertexId in
36 vertexId.trimmingCharacters(in: .whitespacesAndNewlines)
37 })
38
39 for vertexId in vertexIds {
40 if let vertex = vertices[vertexId] {
41 groupVertices.append(vertex)
42 }
43 }
44
45 if groupVertices.count > 0 {
46 return ([Vertex].self, groupVertices)
47 }
48
49 return (NSObject.self, NSObject())
50 }
51 }