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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.
15import Foundation
16
17struct VertexParserStrategy: MapParserStrategy {
18 private let regex = MapParsingPatterns.vertex
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 >= 4
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 let key = String(line[Range(match.range(at: 1), in: line)!])
32 let xString = String(line[Range(match.range(at: 2), in: line)!])
33 let yString = String(line[Range(match.range(at: 3), in: line)!])
34 let x = CGFloat(truncating: NumberFormatter().number(from: xString) ?? 0.0)
35 let y = CGFloat(truncating: NumberFormatter().number(from: yString) ?? 0.0)
36
37 var vertex = Vertex(
38 id: index,
39 label: key,
40 position: CGPoint(x: x, y: y)
41 )
42
43 if let range = Range(match.range(at: 4), in: line) {
44 let shapeString = String(line[range])
45 vertex.shape = VertexShape(rawValue: shapeString.lowercased()) ?? .circle
46 }
47
48 return (Vertex.self, vertex)
49 }
50}