DD.CBU.CaasDeploy.Library.Macros.ImageMacro.SubstituteTokensInString C# (CSharp) Method

        public async Task<string> SubstituteTokensInString(RuntimeContext runtimeContext, TaskContext taskContext, string input)
        {
            string output = input;

            var matches = ImageRegex.Matches(input);
            if (matches.Count > 0)
            {
                foreach (Match match in matches)
                {
                    string imageType = match.Groups[1].Value;
                    string location = match.Groups[2].Value;
                    string imageName = match.Groups[3].Value;

                    using (var client = HttpClientFactory.GetClient(runtimeContext.AccountDetails, "text/xml"))
                    {
                        var url = (imageType == "customerImage")
                            ? string.Format(ImageUrl, runtimeContext.AccountDetails.OrgId, imageName)
                            : string.Format(ImageUrl, "base", imageName);

                        var response = await client.GetAsync(runtimeContext.AccountDetails.BaseUrl + url);
                        response.ThrowForHttpFailure();

                        var responseBody = await response.Content.ReadAsStringAsync();
                        var document = XDocument.Parse(responseBody);
                        var imageId = document.Root
                            .Elements(ServerNamespace + "image")
                            .Where(e => e.Attribute("location").Value == location)
                            .Select(e => e.Attribute("id").Value)
                            .FirstOrDefault();

                        if (imageId == null)
                        {
                            throw new TemplateParserException($"Image '{imageName}' not found in datacenter '{location}'.");
                        }

                        output = output.Replace(match.Groups[0].Value, imageId);
                    }
                }
            }

            return output;
        }
    }

        public async Task ServerImage_SubstituteTokensInString_NotFound()
        {
            var client = new FakeHttpClient();
            client.AddResponse("/oec/0.9/base/imageWithDiskSpeed?name=RedHat 6 64-bit 2 CPU", "Image_Get_NotFound.xml");

            var macro = new ImageMacro();
            var input = "$serverImage['NA9', 'RedHat 6 64-bit 2 CPU']";
            await macro.SubstituteTokensInString(_runtimeContext, null, input);
        }