Implement Core Package System

[toymak3r]

Overview

Design and implement a comprehensive package system for Goethe dialog files that supports metadata, validation, and efficient distribution.

Background

Currently, Goethe dialog files are distributed as individual YAML files. A package system will enable better organization, metadata management, and distribution of dialog content.

Requirements

Package Format Design

• Define package format specification (.gdkg files)
• Design package header structure with metadata
• Implement package versioning system
• Create package validation schema

Core Implementation

• Implement Package class in src/engine/core/package/package.cpp
• Add corresponding header in include/goethe/package.hpp
• Implement package creation and extraction utilities
• Add package validation and integrity checking

Package Features

• Metadata Support
  • Package name, version, author, description
  • Creation date, modification date
  • Dependencies and requirements
  • Tags and categories
• Content Management
  • Multiple dialog files per package
  • Asset bundling (images, audio, etc.)
  • Dependency resolution
  • Content validation
• Package Operations
  • Create package from directory
  • Extract package to directory
  • List package contents
  • Validate package integrity
  • Update package metadata

Command-Line Tools

• Enhance gdkg_tool with package operations
• Add package creation commands
• Add package extraction commands
• Add package validation commands
• Add package listing commands

Testing

• Unit tests for package system in src/tests/test_package.cpp
• Integration tests with existing dialog system
• Performance tests for large packages
• Error handling tests
• Cross-platform compatibility tests

Documentation

• Package format specification
• API documentation for package system
• Command-line tool documentation
• Package creation and usage examples

Technical Details

Package Format Structure

GDKG Package Format:
- Header (32 bytes): Magic, version, flags, metadata offset
- Metadata Section: JSON/YAML metadata
- Content Section: Compressed dialog files and assets
- Index Section: File locations and checksums
- Footer: Package checksum and validation data

API Design

class Package {
public:
    Package();
    ~Package();
    
    // Package creation
    static Package create(const std::string& name, const std::string& version);
    void add_file(const std::string& path, const std::vector<uint8_t>& data);
    void set_metadata(const PackageMetadata& metadata);
    bool save(const std::string& path);
    
    // Package loading
    static Package load(const std::string& path);
    std::vector<uint8_t> get_file(const std::string& path);
    PackageMetadata get_metadata() const;
    std::vector<std::string> list_files() const;
    
    // Validation
    bool validate() const;
    bool verify_integrity() const;
};

struct PackageMetadata {
    std::string name;
    std::string version;
    std::string author;
    std::string description;
    std::vector<std::string> tags;
    std::map<std::string, std::string> dependencies;
    std::chrono::system_clock::time_point created;
    std::chrono::system_clock::time_point modified;
};

Performance Targets

• Package creation: <1 second for 100MB content
• Package loading: <500ms for 100MB content
• Memory usage: <2x package size during operations

Acceptance Criteria

• Package system compiles and links successfully
• All tests pass
• Package creation and extraction work correctly
• Metadata is properly stored and retrieved
• Package validation detects corruption
• Command-line tools work as expected
• Documentation is complete and accurate

Priority

High - This is part of the short-term roadmap and essential for distribution.

Labels

• enhancement
• package-system
• distribution
• short-term
• high-priority

Estimated Effort

• Development: 3-4 weeks
• Testing: 1-2 weeks
• Documentation: 1 week