Restructure codebase for fullstack extension

[akumm2k]

TODO

• Add CLI tests
• Add GitHub automated tests

[Copilot]

Pull request overview

This PR restructures the codebase from a monolithic implementation to a fullstack-ready architecture, separating the game logic into a reusable backend library and creating a distinct CLI frontend. The restructuring prepares the project for future expansion with a web API and React frontend.

Key Changes:

• Separated backend game logic into a header-only library (backend/include/model/)
• Created standalone CLI application with proper CMake build configuration
• Added test data files and documentation for the CLI interface

Reviewed changes

Copilot reviewed 8 out of 14 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
tests/data/vertical-jane.in	Test case for vertical win scenario
tests/data/horizontal-jim.in	Test case for horizontal win scenario
tests/data/diag-faltint.in	Test case for diagonal win with incorrect winner name in comment
cli/view-controller.hpp	Updated include paths to use backend library, removed trailing whitespace
cli/main.cpp	New CLI entry point
cli/README.md	CLI documentation with incorrect test file paths
cli/CMakeLists.txt	CLI build configuration
build_cli.sh	Build script for CLI application
backend/include/model/win-line.hpp	Extracted WinLine/WinPoint data structures with spelling error and incorrect copy assignment
backend/include/model/tictactoe-model.hpp	Refactored game model with constructor initialization order issue and performance concern
backend/CMakeLists.txt	Backend library configuration
CMakeLists.txt	Root CMake configuration requiring C++20
.gitignore	Added build directory
README.md	Updated to reflect fullstack architecture

Comments suppressed due to low confidence (2)

backend/include/model/tictactoe-model.hpp:98

• The get_board() method returns the board by value, which creates an unnecessary copy of the entire unordered_map. This could impact performance, especially for large game states. Consider returning const board_type& instead to avoid the copy.
  backend/include/model/tictactoe-model.hpp:91
• The constructor's member initializer list has parameters in the wrong order. The member initialization order should match the declaration order in the class. Members are initialized in declaration order (tiles_to_win, player_names, turn, board, winner, dirs, line), but the initializer list has: turn, tiles_to_win, winner, player_names. This can lead to subtle bugs and should be reordered to: tiles_to_win(tiles_to_win), player_names({player1_name, player2_name}), turn(1), winner(-1).

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[Copilot]

Pull request overview

Copilot reviewed 8 out of 14 changed files in this pull request and generated 1 comment.

Comments suppressed due to low confidence (2)

backend/include/model/tictactoe-model.hpp:99

• The get_board() method is marked noexcept, but it returns a copy of std::unordered_map, which can throw during copy construction (e.g., if memory allocation fails). Remove the noexcept specifier or return a const reference instead.
  backend/include/model/tictactoe-model.hpp:91
• Member initialization order doesn't match declaration order. Members are declared as: tiles_to_win, player_names, turn, board, winner, but initialized as: turn, tiles_to_win, winner, player_names. While this will work, it's better practice to initialize in declaration order to improve maintainability and avoid potential issues.

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[Copilot]

The documentation shows building with g++ -std=c++20 main.cpp && ./a.out, but the restructured codebase uses CMake and the code now depends on the backend library. This build command will not work. Consider updating to reference the CMake build process or the build_cli.sh script.

Suggested change

	g++ -std=c++20 main.cpp && ./a.out
	# Build and run using the provided script:
	./build_cli.sh
	./cli

[akumm2k]

only build_cli.sh is necessary :)
I will change