internal Template ParseAndValidateTemplate()

in src/Analyzer.TemplateProcessor/ArmTemplateProcessor.cs [102:153]
30 lines of code
5 McCabe index (conditional complexity)

        internal Template ParseAndValidateTemplate(InsensitiveDictionary<JToken> parameters, InsensitiveDictionary<JToken> metadata)
        {
            Dictionary<string, (string, int)> copyNameMap = [];

            Template template = TemplateEngine.ParseTemplate(armTemplate);

            TemplateEngine.ValidateTemplate(template, apiVersion, TemplateDeploymentScope.NotSpecified);

            SetOriginalResourceNames(template);

            // If there are resources using copies, the original resource will
            // be removed from template.Resources and the copies will be added instead,
            // to the end of the array. This means that OriginalName will be lost
            // in the resource and will be out of order.
            // To work around this, build a map of copy name to OriginalName and index
            // so OriginalName can be updated and the order fixed after copies are finished
            for (int i = 0; i < template.Resources.Length; i++)
            {
                var resource = template.Resources[i];
                if (resource.Copy != null) copyNameMap[resource.Copy.Name.Value] = (resource.OriginalName, i);
            }

            var managementGroupName = metadata["managementGroup"]["name"].ToString();
            var subscriptionId = metadata["subscription"]["subscriptionId"].ToString();
            var resourceGroupName = metadata["resourceGroup"]["name"].ToString();

            try
            {
                TemplateEngine.ProcessTemplateLanguageExpressions(managementGroupName, subscriptionId, resourceGroupName, template, apiVersion, parameters, metadata, null);
            }
            catch (Exception ex)
            {
                if (ex.Message.Contains("incorrect segment lengths")) {
                    // Processing stops when the error is found: some resources could be missing
                    // information that is needed for the remaining template processing,
                    // like updated values in their DependsOn and Name properties
                    throw;
                }

                // Do not throw if there was another issue with evaluating language expressions

                logger?.LogWarning(ex, "An exception occurred when processing the template language expressions");
            }

            MapTopLevelResources(template, copyNameMap);

            TemplateEngine.ValidateProcessedTemplate(template, apiVersion, TemplateDeploymentScope.NotSpecified);

            template = ProcessResourcesAndOutputs(template);

            return template;
        }