Implement basic playable Math Marauders game #1

cs-util · 2025-07-08T18:15:48Z

Summary

flesh out index.html with UI elements
add minimal game framework and logic modules
hook up game controller in index.js
add jest unit tests for core logic
document how to run the game and tests

Testing

npm test

https://chatgpt.com/codex/tasks/task_e_686d29efb640832cb2bae8a52efabb05

gemini-code-assist

Summary of Changes

Hello @cs-util, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces the foundational elements for a playable "Math Marauders" game. It establishes the core game loop, user interface, and essential game mechanics, allowing players to interact with the game, make choices, and progress through waves.

Highlights

Initial Game UI: The index.html file has been completely revamped to include all necessary UI elements for the game, such as player/enemy counts, interactive choice buttons, and a game start button, along with a popup for wave completion.
Modular Game Logic: A suite of new JavaScript modules (BattleSystem, FlockSystem, GateSystem, WaveGenerator) has been added to encapsulate distinct game mechanics, promoting a clean and maintainable architecture.
Central Game Orchestration: The GameController class is introduced as the central hub, coordinating interactions between the UI, game logic, persistence, and telemetry, managing wave progression, and calculating game outcomes.
Data Persistence & Telemetry: Basic persistence using localStorage for star ratings and a console-logging telemetry system have been implemented to track player progress and game events.
Comprehensive Unit Tests: New Jest unit tests have been added for key game logic components like GateSystem, WaveGenerator, PersistenceManager, and Telemetry, ensuring the correctness of core functionalities.
Updated Documentation: The README.md file now includes clear instructions on how to run the newly implemented game and its associated tests.

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Code Review

The code introduces a basic playable Math Marauders game. The review focuses on ensuring the player's army size remains an integer, improving the reliability of the tests, and addressing some potential bugs and code smells.

gemini-code-assist · 2025-07-08T18:19:02Z

src/game/FlockSystem.js

+   * @param {number} delta
+   */
+  add(delta) {
+    this.size = Math.max(0, this.size + delta);


To ensure the number of soldiers is always an integer, use Math.floor when adding to the size.

Suggested change

this.size = Math.max(0, this.size + delta);

this.size = Math.max(0, Math.floor(this.size + delta));

gemini-code-assist · 2025-07-08T18:19:02Z

src/game/FlockSystem.js

+  }
+
+  set(value) {
+    this.size = Math.max(0, value);


To ensure the number of soldiers is always an integer, use Math.floor when setting the size.

Suggested change

this.size = Math.max(0, value);

this.size = Math.max(0, Math.floor(value));

gemini-code-assist · 2025-07-08T18:19:02Z

src/index.test.js

+  function computeStars(ratio) {
+    if (ratio <= 0.4) return 1;
+    if (ratio <= 0.6) return 2;
+    if (ratio <= 0.75) return 3;
+    if (ratio <= 0.9) return 4;
+    return 5;
+  }
+  test('rating boundaries', () => {
+    expect(computeStars(0.3)).toBe(1);
+    expect(computeStars(0.5)).toBe(2);
+    expect(computeStars(0.7)).toBe(3);
+    expect(computeStars(0.85)).toBe(4);
+    expect(computeStars(0.95)).toBe(5);
+  });


This test suite re-implements the computeStars logic instead of testing the actual implementation from GameController.js. Refactor this to test GameController.prototype.computeStars.

gemini-code-assist · 2025-07-08T18:19:02Z

src/game/GameController.js

+      const enemy = Math.floor(size * WaveGenerator.SKIRMISH_FACTOR);
+      size = Math.max(0, size - enemy);


To avoid duplicating logic, use the BattleSystem.resolveSkirmish method to calculate the skirmish result. Pass the current size as both playerSize and optimalSize since this is for optimal path calculation.

Suggested change

const enemy = Math.floor(size * WaveGenerator.SKIRMISH_FACTOR);

size = Math.max(0, size - enemy);

const { result } = this.battle.resolveSkirmish(size, size);

size = result;

gemini-code-assist · 2025-07-08T18:19:02Z

src/game/UIManager.js

+  }
+
+  showPopup(text, stars) {
+    this.popupText.textContent = `${text}\n${'★'.repeat(stars)}${'☆'.repeat(5 - stars)}`;


Use <br> tag to ensure the stars are displayed on a new line.

Suggested change

this.popupText.textContent = `${text}\n${'★'.repeat(stars)}${'☆'.repeat(5 - stars)}`;

this.popupText.innerHTML = `${text}<br>${'★'.repeat(stars)}${'☆'.repeat(5 - stars)}`;

gemini-code-assist · 2025-07-08T18:19:03Z

src/game/WaveGenerator.js

+    for (let i = 0; i < count; i++) {
+      gates.push(this._generateGateOps(wave));
+    }
+    return { gates, retreatGateCount: count };


The retreatGateCount is not used. Remove it to simplify the return.

Suggested change

return { gates, retreatGateCount: count };

return { gates };

Implement basic playable version

42397c2

cs-util added the codex label Jul 8, 2025 — with ChatGPT Codex Connector

gemini-code-assist bot reviewed Jul 8, 2025

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	this.size = Math.max(0, this.size + delta);
	this.size = Math.max(0, Math.floor(this.size + delta));

	this.size = Math.max(0, value);
	this.size = Math.max(0, Math.floor(value));

		const enemy = Math.floor(size * WaveGenerator.SKIRMISH_FACTOR);
		size = Math.max(0, size - enemy);

	this.popupText.textContent = `${text}\n${'★'.repeat(stars)}${'☆'.repeat(5 - stars)}`;
	this.popupText.innerHTML = `${text}<br>${'★'.repeat(stars)}${'☆'.repeat(5 - stars)}`;

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cs-util commented Jul 8, 2025

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