Function validateSyncSnapshot

Source

export function validateSyncSnapshot(snapshot: unknown): {
  valid: boolean;
  reason?: string;
} {
  if (!snapshot || typeof snapshot !== "object") {
    return { valid: false, reason: "Snapshot is not an object" };
  }

  const snap = snapshot as Record<string, unknown>;

  if (!Array.isArray(snap.entries)) {
    return { valid: false, reason: "Missing or invalid entries array" };
  }

  if (!Array.isArray(snap.uniqueMediaIds)) {
    return { valid: false, reason: "Missing or invalid uniqueMediaIds array" };
  }

  if (!Array.isArray(snap.remainingMediaIds)) {
    return {
      valid: false,
      reason: "Missing or invalid remainingMediaIds array",
    };
  }

  if (snap.remainingMediaIds.length === 0) {
    return { valid: false, reason: "No remaining entries in snapshot" };
  }

  if (!snap.progress || typeof snap.progress !== "object") {
    return { valid: false, reason: "Missing or invalid progress object" };
  }

  if (typeof snap.timestamp !== "number") {
    return { valid: false, reason: "Missing or invalid timestamp" };
  }

  if (snap.timestamp > Date.now()) {
    return { valid: false, reason: "Timestamp is in the future" };
  }

  return { valid: true };
}
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