/// <summary>
/// Adds a new rule.
/// </summary>
/// <param name="rule">The rule.</param>
/// <param name="ruleAddPriorityOption">The rule add priority option.</param>
/// <returns></returns>
/// <exception cref="ArgumentNullException">rule or rule</exception>
/// <exception cref="NotSupportedException">
/// The placement option '{ruleAddPriorityOption.PriorityOption}' is not supported.
/// </exception>
public Task <RuleOperationResult> AddRuleAsync(Rule <TContentType, TConditionType> rule, RuleAddPriorityOption ruleAddPriorityOption)
{
if (rule is null)
{
throw new ArgumentNullException(nameof(rule));
}
if (ruleAddPriorityOption is null)
{
throw new ArgumentNullException(nameof(rule));
}
return(this.AddRuleInternalAsync(rule, ruleAddPriorityOption));
}
private async Task <RuleOperationResult> AddRuleInternalAsync(Rule <TContentType, TConditionType> rule, RuleAddPriorityOption ruleAddPriorityOption)
{
List <string> errors = new List <string>();
RulesFilterArgs <TContentType> rulesFilterArgs = new RulesFilterArgs <TContentType>
{
ContentType = rule.ContentContainer.ContentType
};
IEnumerable <Rule <TContentType, TConditionType> > existentRules = await this.rulesDataSource.GetRulesByAsync(rulesFilterArgs).ConfigureAwait(false);
if (ruleAddPriorityOption.PriorityOption == PriorityOptions.AtRuleName &&
!existentRules.Any(r => string.Equals(r.Name, ruleAddPriorityOption.AtRuleNameOptionValue, StringComparison.OrdinalIgnoreCase)))
{
errors.Add($"Rule name '{ruleAddPriorityOption.AtRuleNameOptionValue}' specified for priority placement does not exist.");
}
if (existentRules.Any(r => string.Equals(r.Name, rule.Name, StringComparison.OrdinalIgnoreCase)))
{
errors.Add($"A rule with name '{rule.Name}' already exists.");
}
if (errors.Any())
{
return(RuleOperationResult.Error(errors));
}
switch (ruleAddPriorityOption.PriorityOption)
{
case PriorityOptions.AtTop:
rule.Priority = 1;
await ManagementOperations.Manage(existentRules)
.UsingDataSource(this.rulesDataSource)
.IncreasePriority()
.UpdateRules()
.AddRule(rule)
.ExecuteOperationsAsync()
.ConfigureAwait(false);
break;
case PriorityOptions.AtBottom:
rule.Priority = existentRules.Max(r => r.Priority) + 1;
await ManagementOperations.Manage(existentRules)
.UsingDataSource(this.rulesDataSource)
.AddRule(rule)
.ExecuteOperationsAsync()
.ConfigureAwait(false);
break;
case PriorityOptions.AtPriorityNumber:
int priorityMin = existentRules.MinOrDefault(r => r.Priority);
int priorityMax = existentRules.MaxOrDefault(r => r.Priority);
int rulePriority = ruleAddPriorityOption.AtPriorityNumberOptionValue;
rulePriority = Math.Min(rulePriority, priorityMax + 1);
rulePriority = Math.Max(rulePriority, priorityMin);
rule.Priority = rulePriority;
await ManagementOperations.Manage(existentRules)
.UsingDataSource(this.rulesDataSource)
.FilterFromThresholdPriorityToBottom(rulePriority)
.IncreasePriority()
.UpdateRules()
.AddRule(rule)
.ExecuteOperationsAsync()
.ConfigureAwait(false);
break;
case PriorityOptions.AtRuleName:
int firstPriorityToIncrement = existentRules
.FirstOrDefault(r => string.Equals(r.Name, ruleAddPriorityOption.AtRuleNameOptionValue, StringComparison.OrdinalIgnoreCase))
.Priority;
rule.Priority = firstPriorityToIncrement;
await ManagementOperations.Manage(existentRules)
.UsingDataSource(this.rulesDataSource)
.FilterFromThresholdPriorityToBottom(firstPriorityToIncrement)
.IncreasePriority()
.UpdateRules()
.AddRule(rule)
.ExecuteOperationsAsync()
.ConfigureAwait(false);
break;
default:
throw new NotSupportedException($"The placement option '{ruleAddPriorityOption.PriorityOption}' is not supported.");
}
return(RuleOperationResult.Success());
}