moon-phase.js

const MOON_PHASES = [
  "New Moon",
  "Waxing Crescent",
  "First Quarter",
  "Waxing Gibbous",
  "Full Moon",
  "Waning Gibbous",
  "Last Quarter",
  "Waning Crescent"
];

Hooks.once('init', () => {
  console.log("Moon Phase Tracker | Initializing");

  // Register a world setting to store current phase index
  game.settings.register('moon-phase-tracker', 'currentPhase', {
    name: "Current Moon Phase",
    hint: "Tracks the current moon phase index",
    scope: "world",
    config: false,
    type: Number,
    default: 0
  });
});

Hooks.once('ready', () => {
  if (game.user.isGM) {
    createMoonPhaseButton();
  }
});

function createMoonPhaseButton() {
  // Add a button to the Foundry sidebar
  let button = $(`<button class="moon-phase-btn" title="Advance Moon Phase">
      🌙 <span class="moon-phase-text"></span>
    </button>`);
  
  button.click(() => {
    advanceMoonPhase();
  });

  // Add styling
  const style = `
    <style>
    .moon-phase-btn {
      background: none;
      border: none;
      cursor: pointer;
      font-size: 1.5em;
      color: #ddd;
      margin: 5px;
    }
    .moon-phase-btn:hover {
      color: #fff;
    }
    </style>
  `;
  $("head").append(style);

  // Append the button to the controls sidebar (top area)
  $('#controls').prepend(button);

  updateMoonPhaseText();
}

async function advanceMoonPhase() {
  let current = game.settings.get('moon-phase-tracker', 'currentPhase');
  current = (current + 1) % MOON_PHASES.length;
  await game.settings.set('moon-phase-tracker', 'currentPhase', current);
  updateMoonPhaseText();
}

function updateMoonPhaseText() {
  let current = game.settings.get('moon-phase-tracker', 'currentPhase');
  $(".moon-phase-text").text(MOON_PHASES[current]);
}