This game is a combination between Gwent and HeartStone card games that have multiple features and their own play-style.
The implementation follows a very basic paradigm. The game takes JSON objects as input and parses them into it's structures, building the game environment. InitGame creates the BattleGround and the Players with their decks. Each game is running through the GameEngine, that will finally return the resulted JSON data. The GameEngine takes every action and sends it to the Controller, which executes them and updates the JSON data with the appropriate messages. At this stage, the Controller uses the classes in the gamedev package that illustrate every object in the game.
The BattleGround contains the players, the table (with 4 rows) and some metadata about the current match.
Each player possesses the decks that they created at game initialization. The player HUD is only important during a match, because it contains the data about the state of the player like the cards in their deck, the cards in their hand, the mana left, the hero.
The cards are structured in such a way that every game character is perceived as a card. What makes them different from each other is the abilities that they might have, the ability to attack, the ability of being placed on the table or even their name.
GwentStone is a very simple game, with the potential of being extended to a more complex design, as it uses a very common type of I/O communication through JSON.