private LessonDocument ParseDocument(StringWithIndex text)
{
var sections = text.SplitWithoutModification(new string[] { "\n# STEP = " });
var header = sections[0];
var steps = sections.Skip(1).ToList();
var document = new LessonDocument(text);
// Get the header metadata
var headerLines = header.GetLines();
var title = headerLines.GetFirstLineValue("% TITLE = ").Trim();
document.Children.Add(new LessonDocumentTitle(title));
// Process the steps
foreach (var s in steps)
{
document.Children.Add(ParseStep(s));
}
// Add an end of file span (to catch pretext that was not processed)
document.Children.Add(new LessonEnd(new StringWithIndex(text.Text, text.Length, 0)));
DecorateNodesWithParent(document);
DecorateSpansWithSkippedText(document);
return(document);
}
private static void DecorateSpansWithSkippedText(LessonDocument document)
{
// Decorate the LessonSpans with skipped parts
var spans = document.FlattenSpans();
// Find gaps between the spans
LessonSpan lastSpan = null;
foreach (var span in spans)
{
var nextExpectedIndex = lastSpan != null?lastSpan.Content.GetIndexAfter() : 0;
if (span.Content.Index > nextExpectedIndex)
{
// Get skipped content
var skipLength = span.Content.Index - nextExpectedIndex;
var skipContent = new StringWithIndex(document.Content.Source, nextExpectedIndex, skipLength);
span.SkippedPreText = skipContent;
}
else if (span.Content.Index == nextExpectedIndex)
{
// Blank Skipped
span.SkippedPreText = new StringWithIndex(document.Content.Source, nextExpectedIndex, 0);
}
// TODO: move to testing
else
{
var lastSpanContent = lastSpan.Content;
var skipped = span.SkippedPreText;
var spanContent = span.Content;
throw new ArgumentException("The document is malformed and has overlapping spans");
}
lastSpan = span;
}
}
public async Task <string> DocumentUpload(List <IFormFile> files, int lessonId, string path)
{
foreach (var formFile in files)
{
if (formFile.Length > 0)
{
var filename = formFile.FileName;
var guidKey = Guid.NewGuid();
if (!Directory.Exists(path + "\\Upload\\Documents\\"))
{
Directory.CreateDirectory(path + "\\Upload\\Documents\\");
}
var extension = formFile.FileName.Split(".")[1];
var fullPath = path + "\\Upload\\Documents\\" + guidKey + "." + extension;
using (var stream = System.IO.File.Create(fullPath))
{
await formFile.CopyToAsync(stream);
}
var lessonDocument = new LessonDocument()
{
LessonId = lessonId,
FileKey = guidKey,
FileName = filename,
FilePath = fullPath
};
ctx.LessonDocuments.Add(lessonDocument);
}
}
await ctx.SaveChangesAsync();
return("Upload Successyfully");
}
