private void ReadIntoMappingModel()

in src/Elastic.Serilog.Enrichers.Web/Lib/UAParser.cs [641:687]
41 lines of code
9 McCabe index (conditional complexity)

        private void ReadIntoMappingModel(string yamlInputString)
        {
            // line splitting using various splitting characters
            var lines = yamlInputString.Split(new[] { Environment.NewLine, "\r", "\n", "\r\n" }, StringSplitOptions.RemoveEmptyEntries);
            var lineCount = 0;
            Mapping activeMapping = null;

            foreach (var line in lines)
            {
                lineCount++;
                if (line.Trim().StartsWith("#")) //skipping comments
                    continue;
                if (line.Trim().Length == 0)
                    continue;

                //is this a new mapping entity
                if (line[0] != ' ')
                {
                    var indexOfMappingColon = line.IndexOf(':');
                    if (indexOfMappingColon == -1)
                        throw new ArgumentException("YamlParsing: Expecting mapping entry to contain a ':', at line " + lineCount);
                    var name = line.Substring(0, indexOfMappingColon).Trim();
                    activeMapping = new Mapping();
                    _mappings.Add(name, activeMapping);
                    continue;
                }

                //reading scalar entries into the active mapping
                if (activeMapping == null)
                    throw new ArgumentException("YamlParsing: Expecting mapping entry to contain a ':', at line " + lineCount);

                var seqLine = line.Trim();
                if (seqLine[0] == '-')
                {
                    activeMapping.BeginSequence();
                    seqLine = seqLine.Substring(1);
                }

                var indexOfColon = seqLine.IndexOf(':');
                if (indexOfColon == -1)
                    throw new ArgumentException("YamlParsing: Expecting scalar mapping entry to contain a ':', at line " + lineCount);

                var key = seqLine.Substring(0, indexOfColon).Trim();
                var value = ReadQuotedValue(seqLine.Substring(indexOfColon + 1).Trim());
                activeMapping.AddToSequence(key, value);
            }
        }