private static async Task UpdateLinkedWafPolicy()

in Azure WAF/Alert - Process Azure FrontDoor Alerts/ProcessAFDAlerts.cs [113:162]
40 lines of code
5 McCabe index (conditional complexity)

        private static async Task UpdateLinkedWafPolicy(AlertInfo alertInfo, ILogger log, IEnumerable<Row> logs = null, bool deleteRules = false)
        {
            // 1. Create an instance of FrontdoorManagementClient
            var frontdoorClient =
                new FrontDoorManagementClient(
                    SdkContext.AzureCredentialsFactory.FromServicePrincipal(ClientId, ClientSecret, TenantId, AzureEnvironment.AzureGlobalCloud));
            
            frontdoorClient.SubscriptionId = WafPolicySubscriptionId;

            // 2. Use it to get the WAF Policy
            WebApplicationFirewallPolicy wafPolicy;
            try
            {
                wafPolicy = await frontdoorClient.Policies.GetAsync(WafPolicyResourceGroupName, WafPolicyName);

                if (wafPolicy == null)
                {
                    Console.WriteLine("Does not exist");
                    throw new Exception("Waf policy does not exist");
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
                throw;
            }

            // 3. Add or remove the rate limit rules from the WAF policy
            if (deleteRules)
            {
                DeleteRulesFromWafPolicy(wafPolicy, alertInfo);
            }
            else
            {
                UpdateWafWithRulesToStopAttack(wafPolicy, alertInfo, logs);
            }

            // 4. Update/Deploy the WAF policy
            try
            {
                await frontdoorClient.Policies.CreateOrUpdateAsync(WafPolicyResourceGroupName, WafPolicyName,
                    wafPolicy);
            }
            catch (Exception e)
            {
                log.LogError("Failed to update waf policy", e);
                throw;
            }
            
        }