Feature Flags Endpoint

curl -X GET "https://api.solute.dev/api/feature-flags?userId=user_123&anonymousId=anon_456" \
  -H "X-Api-Key: your_api_key"

{
  "flags": {
    "new-checkout-flow": {
      "key": "new-checkout-flow",
      "enabled": true,
      "variant": "variant-b",
      "value": true,
      "rolloutPercentage": 50
    },
    "show-ai-assistant": {
      "key": "show-ai-assistant",
      "enabled": false,
      "value": false
    }
  },
  "experiments": {
    "pricing-test": {
      "key": "pricing-test",
      "name": "Pricing Page A/B Test",
      "variants": [
        { "key": "control", "value": "original" },
        { "key": "variant-a", "value": "new-design" }
      ],
      "assignedVariant": "variant-a",
      "status": "running"
    }
  },
  "timestamp": "2025-01-15T10:30:00Z"
}

function assignVariant(userId: string, flagKey: string, rolloutPercentage: number): boolean {
  const hash = djb2Hash(`${userId}:${flagKey}`);
  const userPercentage = (hash % 100) + 1; // 1-100
  return userPercentage <= rolloutPercentage;
}

function djb2Hash(str: string): number {
  let hash = 5381;
  for (let i = 0; i < str.length; i++) {
    hash = (hash * 33) ^ str.charCodeAt(i);
  }
  return hash >>> 0;
}