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/*
Copyright (C) 2024 Rubén Beltrán del Río
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see https://map.tranquil.systems.
*/
import Foundation
struct GroupParserStrategy: MapParserStrategy {
private let regex = MapParsingPatterns.group
func canHandle(line: String) -> Bool {
let range = NSRange(location: 0, length: line.utf16.count)
let matches = regex.matches(in: String(line), options: [], range: range)
return matches.count > 0 && matches[0].numberOfRanges == 3
}
func handle(index: Int, line: String, vertices: [String: Vertex]) -> (Any.Type, Any) {
let range = NSRange(location: 0, length: line.utf16.count)
let matches = regex.matches(in: String(line), options: [], range: range)
let match = matches[0]
var groupVertices: [Vertex] = []
let vertexIdString = String(line[Range(match.range(at: 2), in: line)!])
let vertexIds = vertexIdString.split(separator: ",", omittingEmptySubsequences: true).map(
String.init).map({ vertexId in
vertexId.trimmingCharacters(in: .whitespacesAndNewlines)
})
for vertexId in vertexIds {
if let vertex = vertices[vertexId] {
groupVertices.append(vertex)
}
}
if groupVertices.count > 0 {
return ([Vertex].self, groupVertices)
}
return (NSObject.self, NSObject())
}
}
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