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[rbdr/map] / 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).map({ vertexId in
37 vertexId.trimmingCharacters(in: .whitespacesAndNewlines)
38 })
39
40 for vertexId in vertexIds {
41 if let vertex = vertices[vertexId] {
42 groupVertices.append(vertex)
43 }
44 }
45
46 if groupVertices.count > 0 {
47 return ([Vertex].self, groupVertices)
48 }
49
50 return (NSObject.self, NSObject())
51 }
52 }