/// <summary>
/// Expands a set of scoped custom variable slots into a final array containing the custom variables and their scope.
/// </summary>
/// <param name="scopedCustomVariableSlots">Set of scoped custom variable slots to expand.</param>
/// <returns>An array of custom variables with their scope indexed by slot.</returns>
internal static ScopedCustomVariable[] GetFinalCustomVariables(params ScopedCustomVariableSlots[] scopedCustomVariableSlots)
{
var allSlots = scopedCustomVariableSlots.SelectMany(s => s.AllSlots).ToList();
var highestSlotIndex = allSlots.Any() ? allSlots.Max(s => s.Key) : 0;
var finalCustomVariables = new ScopedCustomVariable[highestSlotIndex + 1];
foreach (var scopedSlots in scopedCustomVariableSlots.OrderByDescending(s => s.Scope))
foreach (var slot in scopedSlots.AllSlots)
finalCustomVariables[slot.Key] = new ScopedCustomVariable(scopedSlots.Scope, slot.Value);
return finalCustomVariables;
}
/// <summary>
/// Get parameters for a given set of custom variables.
/// </summary>
/// <param name="customVariables">Custom variables to obtain parameters from.</param>
/// <returns>Enumerable of key/value pairs containing parameters for these custom variables.</returns>
private static IEnumerable<KeyValuePair<string, string>> GetParameters(ScopedCustomVariable[] customVariables)
{
yield return KeyValuePair.Create("utme", EncodeCustomVariables(customVariables));
}
/// <summary>
/// Encode custom variables into a single parameter string.
/// </summary>
/// <param name="customVariables">Custom variables to encode.</param>
/// <returns>Encoded custom variables.</returns>
internal static string EncodeCustomVariables(ScopedCustomVariable[] customVariables)
{
return UtmeEncoder.Encode("8", customVariables.Select(c => c == null ? null : c.Variable.Name).ToArray())
+ UtmeEncoder.Encode("9", customVariables.Select(c => c == null ? null : c.Variable.Value).ToArray())
+ UtmeEncoder.Encode("11", customVariables.Select(c => c == null ? null : GetScopeIdentity(c.Scope)).ToArray());
}
