internal static string GetSecretAndTargetForPlatform()

in SDK/AppCenter/Microsoft.AppCenter.Shared/AppCenter.cs [31:92]
58 lines of code
15 McCabe index (conditional complexity)

        internal static string GetSecretAndTargetForPlatform(string secrets, string platformIdentifier)
        {
            var platformTargetIdentifier = platformIdentifier + TargetKeyNameUpper;
            if (string.IsNullOrEmpty(secrets))
            {
                throw new AppCenterException("App secrets string is null or empty");
            }

            // If there are no equals signs, then there are no named identifiers, but log a message in case the developer made 
            // a typing error.
            if (!secrets.Contains(PlatformKeyValueDelimiter))
            {
                AppCenterLog.Debug(AppCenterLog.LogTag, "No named identifier found in appSecret; using as-is");
                return secrets;
            }

            // Iterate over matching patterns.
            var secretsDictionary = new Dictionary<string, string>();
            var matches = _secretsRegex.Matches(secrets);
            foreach (Match match in matches)
            {
                secretsDictionary[match.Groups[1].Value] = match.Groups[2].Value;
            }

            // Extract the secrets for the current platform.
            if (secretsDictionary.ContainsKey(TargetKeyName))
            {
                AppCenterLog.Debug(AppCenterLog.LogTag, "Found 'target=' identifier in the secret; using as-is.");
                return secrets;
            }
            if (secretsDictionary.ContainsKey(AppSecretKeyName))
            {
                AppCenterLog.Debug(AppCenterLog.LogTag, "Found 'appSecret=' identifier in the secret; using as-is.");
                return secrets;
            }
            var platformSecret = string.Empty;
            var platformTargetToken = string.Empty;
            if (secretsDictionary.ContainsKey(platformIdentifier))
            {
                secretsDictionary.TryGetValue(platformIdentifier, out platformSecret);
            }
            if (secretsDictionary.ContainsKey(platformTargetIdentifier))
            {
                secretsDictionary.TryGetValue(platformTargetIdentifier, out platformTargetToken);
            }
            if (string.IsNullOrEmpty(platformSecret) && string.IsNullOrEmpty(platformTargetToken))
            {
                throw new AppCenterException($"Error parsing key for '{platformIdentifier}'");
            }

            // Format the string as "appSecret={};target={}" or "target={}" if needed.
            if (!string.IsNullOrEmpty(platformTargetToken))
            {
                // If there is an app secret
                if (!string.IsNullOrEmpty(platformSecret))
                {
                    platformSecret = AppSecretKeyName + PlatformKeyValueDelimiter + platformSecret + SecretDelimiter;
                }
                platformSecret += TargetKeyName + PlatformKeyValueDelimiter + platformTargetToken;
            }
            return platformSecret;
        }