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//===--- RenamingAction.h - Clang refactoring library ---------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// Provides an action to rename every symbol at a point.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_TOOLING_REFACTORING_RENAME_RENAMINGACTION_H
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#define LLVM_CLANG_TOOLING_REFACTORING_RENAME_RENAMINGACTION_H
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#include "clang/Tooling/Refactoring.h"
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#include "clang/Tooling/Refactoring/AtomicChange.h"
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#include "clang/Tooling/Refactoring/RefactoringActionRules.h"
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#include "clang/Tooling/Refactoring/RefactoringOptions.h"
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#include "clang/Tooling/Refactoring/Rename/SymbolOccurrences.h"
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#include "llvm/Support/Error.h"
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namespace clang {
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class ASTConsumer;
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namespace tooling {
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class RenamingAction {
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public:
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  RenamingAction(const std::vector<std::string> &NewNames,
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                 const std::vector<std::string> &PrevNames,
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                 const std::vector<std::vector<std::string>> &USRList,
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                 std::map<std::string, tooling::Replacements> &FileToReplaces,
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                 bool PrintLocations = false)
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      : NewNames(NewNames), PrevNames(PrevNames), USRList(USRList),
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        FileToReplaces(FileToReplaces), PrintLocations(PrintLocations) {}
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  std::unique_ptr<ASTConsumer> newASTConsumer();
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private:
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  const std::vector<std::string> &NewNames, &PrevNames;
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  const std::vector<std::vector<std::string>> &USRList;
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  std::map<std::string, tooling::Replacements> &FileToReplaces;
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  bool PrintLocations;
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};
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class RenameOccurrences final : public SourceChangeRefactoringRule {
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public:
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  static Expected<RenameOccurrences> initiate(RefactoringRuleContext &Context,
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                                              SourceRange SelectionRange,
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                                              std::string NewName);
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  static const RefactoringDescriptor &describe();
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  const NamedDecl *getRenameDecl() const;
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private:
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  RenameOccurrences(const NamedDecl *ND, std::string NewName)
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      : ND(ND), NewName(std::move(NewName)) {}
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  Expected<AtomicChanges>
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  createSourceReplacements(RefactoringRuleContext &Context) override;
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  const NamedDecl *ND;
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  std::string NewName;
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};
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class QualifiedRenameRule final : public SourceChangeRefactoringRule {
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public:
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  static Expected<QualifiedRenameRule> initiate(RefactoringRuleContext &Context,
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                                                std::string OldQualifiedName,
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                                                std::string NewQualifiedName);
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  static const RefactoringDescriptor &describe();
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private:
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  QualifiedRenameRule(const NamedDecl *ND,
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                      std::string NewQualifiedName)
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      : ND(ND), NewQualifiedName(std::move(NewQualifiedName)) {}
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  Expected<AtomicChanges>
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  createSourceReplacements(RefactoringRuleContext &Context) override;
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  // A NamedDecl which identifies the symbol being renamed.
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  const NamedDecl *ND;
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  // The new qualified name to change the symbol to.
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  std::string NewQualifiedName;
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};
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/// Returns source replacements that correspond to the rename of the given
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/// symbol occurrences.
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llvm::Expected<std::vector<AtomicChange>>
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createRenameReplacements(const SymbolOccurrences &Occurrences,
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                         const SourceManager &SM, const SymbolName &NewName);
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/// Rename all symbols identified by the given USRs.
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class QualifiedRenamingAction {
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public:
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  QualifiedRenamingAction(
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      const std::vector<std::string> &NewNames,
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      const std::vector<std::vector<std::string>> &USRList,
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      std::map<std::string, tooling::Replacements> &FileToReplaces)
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      : NewNames(NewNames), USRList(USRList), FileToReplaces(FileToReplaces) {}
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  std::unique_ptr<ASTConsumer> newASTConsumer();
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private:
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  /// New symbol names.
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  const std::vector<std::string> &NewNames;
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  /// A list of USRs. Each element represents USRs of a symbol being renamed.
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  const std::vector<std::vector<std::string>> &USRList;
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  /// A file path to replacements map.
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  std::map<std::string, tooling::Replacements> &FileToReplaces;
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};
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} // end namespace tooling
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} // end namespace clang
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#endif // LLVM_CLANG_TOOLING_REFACTORING_RENAME_RENAMINGACTION_H