content: /*
   * This file is a part of BSL Language Server.
   *
   * Copyright (c) 2018-2025
   * Alexey Sosnoviy <labotamy@gmail.com>, Nikita Fedkin <nixel2007@gmail.com> and contributors
   *
   * SPDX-License-Identifier: LGPL-3.0-or-later
   *
   * BSL Language Server is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 3.0 of the License, or (at your option) any later version.
   *
   * BSL Language Server 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
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with BSL Language Server.
   */
  package com.github._1c_syntax.bsl.languageserver.references;
  
  import com.github._1c_syntax.bsl.languageserver.context.DocumentContext;
  import com.github._1c_syntax.bsl.languageserver.context.ServerContext;
  import com.github._1c_syntax.bsl.languageserver.context.symbol.SymbolTree;
  import com.github._1c_syntax.bsl.languageserver.references.model.OccurrenceType;
  import com.github._1c_syntax.bsl.languageserver.references.model.Reference;
  import com.github._1c_syntax.bsl.languageserver.utils.Ranges;
  import lombok.RequiredArgsConstructor;
  import org.eclipse.lsp4j.Position;
  import org.springframework.stereotype.Component;
  
  import java.net.URI;
  import java.util.Optional;
  
  /**
   * Реализация поискового движка на основе попадания искомой позиции в строку объявления метода.
   */
  @Component
  @RequiredArgsConstructor
  public class SourceDefinedSymbolDeclarationReferenceFinder implements ReferenceFinder {
  
    private final ServerContext serverContext;
  
    @Override
    public Optional<Reference> findReference(URI uri, Position position) {
      DocumentContext document = serverContext.getDocument(uri);
      if (document == null) {
        return Optional.empty();
      }
  
      SymbolTree symbolTree = document.getSymbolTree();
      return symbolTree.getChildrenFlat()
        .stream()
        .filter(sourceDefinedSymbol -> Ranges.containsPosition(sourceDefinedSymbol.getSelectionRange(), position))
        .map(sourceDefinedSymbol -> new Reference(
          symbolTree.getModule(),
          sourceDefinedSymbol,
          uri,
          sourceDefinedSymbol.getSelectionRange(),
          OccurrenceType.DEFINITION)
        )
        .findFirst();
    }
  }
  