private bool TakeDiffContentReturnMeaning()

in tools/issue-labeler/src/Hubbup.MikLabelModel/Labeler.cs [432:522]
88 lines of code
40 McCabe index (conditional complexity)

        private bool TakeDiffContentReturnMeaning(string[] contentLines)
        {
            string curFile = string.Empty;
            var refFilesWithAdditions = new Dictionary<string, int>();
            int additions = 0, deletions = 0;
            bool lookingAtRefDiff = false;
            var stat = DiffContentLineReadingStatus.readyToStartOver;
            for (int i = 0; i < contentLines.Length; i++)
            {
                var line = contentLines[i];
                switch (stat)
                {
                    case DiffContentLineReadingStatus.readyToStartOver:
                        if (ContainsRefChanges(line))
                        {
                            if (!string.IsNullOrEmpty(curFile) && additions > deletions)
                            {
                                refFilesWithAdditions.Add(curFile, additions - deletions);
                                // reset
                                additions = 0;
                                deletions = 0;
                            }
                            lookingAtRefDiff = true;
                            curFile = line.Substring(13, line.IndexOf(@".cs b/") + 3 - 13);
                            stat = DiffContentLineReadingStatus.expectingIndex;
                        }
                        else if (line.StartsWith("diff --git"))
                        {
                            lookingAtRefDiff = false;
                        }
                        else if (lookingAtRefDiff)
                        {
                            if (line.StartsWith("+") && !IsUnwantedDiff(line))
                            {
                                additions++;
                            }
                            else if (line.StartsWith("-") && !IsUnwantedDiff(line))
                            {
                                deletions++;
                            }
                        }
                        break;
                    case DiffContentLineReadingStatus.expectingIndex:
                        if (line.StartsWith("index "))
                        {
                            stat = DiffContentLineReadingStatus.expectingTripleMinus;
                        }
                        break;
                    case DiffContentLineReadingStatus.expectingTripleMinus:
                        if (line.StartsWith("--- "))
                        {
                            stat = DiffContentLineReadingStatus.expectingTriplePlus;
                        }
                        break;
                    case DiffContentLineReadingStatus.expectingTriplePlus:
                        if (line.StartsWith("+++ "))
                        {
                            stat = DiffContentLineReadingStatus.expectingDoubleAtSign;
                        }
                        break;
                    case DiffContentLineReadingStatus.expectingDoubleAtSign:
                        if (line.StartsWith("@@ "))
                        {
                            stat = DiffContentLineReadingStatus.readyToStartOver;
                        }
                        break;
                    default:
                        break;
                }
            }
            if (!string.IsNullOrEmpty(curFile) && additions > deletions)
            {
                refFilesWithAdditions.Add(curFile, additions - deletions);
            }
            return refFilesWithAdditions.Any();
            // given a diff content
            // readyToStartOver = true
            // additions = 0, deletions = 0
            // read all lines
            // for each line, if readyToStartOver and starts with diff: set expectingIndex to true
            // for each line, if expectingIndex and starts with index: set expectingTripleMinus
            // for each line, if expectingTripleMinus and starts ---: set expectingTriplePlus
            // for each line, if expectingTriplePlus and starts with +++: set expectingDoubleAtSign
            // for each line, if expectingTriplePlus and starts with @@: set readyToStartOver
            // for each line, if readyToStartOver and starts with +: additions++ and if starts with - deletions++
            // for each line, if readyToStartOver and starts with +: additions++ and if starts with - deletions++
            // for each line, if readyToStartOver and starts with diff: ... (already planned for)
            // 


        }