private static void ReadTextDocumentProperty(string propertyAndValue, NLPTextDocumentBuilder builder)
{
int firstSpaceIndex = propertyAndValue.IndexOf(' ');
if (firstSpaceIndex < 0)
{
throw new Exception("Invalid file format");
}
var propertyValue = propertyAndValue.Substring(firstSpaceIndex + 1).Trim();
if (propertyAndValue.StartsWith(NLPTextDocumentFormat.TEXT_DOCUMENT_TITLE))
{
builder.SetTitle(propertyValue);
}
else if (propertyAndValue.StartsWith(NLPTextDocumentFormat.TEXT_DOCUMENT_URI))
{
builder.SetUri(propertyValue);
}
else if (propertyAndValue.StartsWith(NLPTextDocumentFormat.TEXT_DOCUMENT_TIMESTAMP))
{
builder.SetTimestamp(propertyValue);
}
else if (propertyAndValue.StartsWith(NLPTextDocumentFormat.TEXT_DOCUMENT_METADATA))
{
int firstEqualsIndex = propertyValue.IndexOf('=');
if (firstEqualsIndex < 0)
{
throw new Exception("Invalid file format");
}
var key = propertyValue.Substring(0, firstEqualsIndex).Trim();
var value = propertyValue.Substring(firstEqualsIndex + 1).Trim();
builder.AddMetadata(key, value);
}
else
{
throw new Exception("Invalid file format");
}
}
public static NLPTextDocument ReadFromFile(string path)
{
if (!File.Exists(path))
{
throw new ArgumentException($"File not found at path {path}");
}
using (var reader = new StreamReader(path, Encoding.UTF8))
{
var builder = new NLPTextDocumentBuilder();
string line = null;
bool isReadingDocumentProperties = true;
while ((line = reader.ReadLine()) != null)
{
if (String.IsNullOrEmpty(line))
{
continue;
}
if (isReadingDocumentProperties)
{
if (line.StartsWith(NLPTextDocumentFormat.TEXT_DOCUMENT_PROPERTY_PREFIX))
{
ReadTextDocumentProperty(line.Substring(NLPTextDocumentFormat.TEXT_DOCUMENT_PROPERTY_PREFIX.Length), builder);
}
else
{
isReadingDocumentProperties = false;
}
}
if (!isReadingDocumentProperties)
{
ReadDocumentElement(line, builder);
}
}
return(builder.TextDocument);
}
}
private static void ReadDocumentElement(string line, NLPTextDocumentBuilder builder)
{
if (line.StartsWith(NLPTextDocumentFormat.DOCUMENT_ELEMENT_LINE_MARKER))
{
var match = NLPTextDocumentFormat.DOCUMENT_ELEMENT_LINE_REGEX.Match(line);
if (match.Success)
{
try
{
var vestingLevel = Int32.Parse(match.Groups["NestingLevel"].Value);
var elementName = match.Groups["ElementName"].Value;
var elementType = NLPTextDocumentFormat.ElemTypeForElemName[elementName];
var command = match.Groups["Command"].Value;
if (command == NLPTextDocumentFormat.DOCUMENT_ELEMENT_START)
{
string title = null;
int row = 1, rowspan = 1;
int col = 1, colspan = 1;
if (elementType == DocumentElementType.Section ||
elementType == DocumentElementType.NavigationList ||
elementType == DocumentElementType.List ||
elementType == DocumentElementType.Table)
{
title = line.Substring(match.Length).Trim();
if (title.Length == 0)
{
title = null;
}
}
else if (elementType == DocumentElementType.TableHeader ||
elementType == DocumentElementType.TableCell)
{
var values = line.Substring(match.Length).Trim();
var coords = values.Split(',', ':');
if (coords.Length == 2)
{
row = Int32.Parse(coords[0]);
col = Int32.Parse(coords[1]);
}
else if (coords.Length == 4)
{
row = Int32.Parse(coords[0]);
rowspan = Int32.Parse(coords[1]);
col = Int32.Parse(coords[2]);
colspan = Int32.Parse(coords[3]);
}
}
switch (elementType)
{
case DocumentElementType.Section:
builder.StartSection(title);
break;
case DocumentElementType.NavigationList:
builder.StartNavigationList(title);
break;
case DocumentElementType.List:
builder.StartList(title);
break;
case DocumentElementType.ListItem:
builder.StartListItem();
break;
case DocumentElementType.Table:
builder.StartTable(title);
break;
case DocumentElementType.TableHeader:
builder.StartTableHeader(row, col, rowspan, colspan);
break;
case DocumentElementType.TableCell:
builder.StartTableCell(row, col, rowspan, colspan);
break;
}
}
else if (command == NLPTextDocumentFormat.DOCUMENT_ELEMENT_END)
{
switch (elementType)
{
case DocumentElementType.Section:
builder.EndSection();
break;
case DocumentElementType.List:
case DocumentElementType.NavigationList:
builder.EndList();
break;
case DocumentElementType.ListItem:
builder.EndListItem();
break;
case DocumentElementType.Table:
builder.EndTable();
break;
case DocumentElementType.TableHeader:
builder.EndTableHeader();
break;
case DocumentElementType.TableCell:
builder.EndTableCell();
break;
}
}
else if (command == NLPTextDocumentFormat.DOCUMENT_ELEMENT_ITEMS)
{
var startOfItems = line.IndexOf(NLPTextDocumentFormat.DOCUMENT_ELEMENT_ITEMS_START);
var title = line.Substring(match.Length, startOfItems - match.Length).Trim();
if (title.Length == 0)
{
title = null;
}
if (elementType == DocumentElementType.NavigationList)
{
builder.StartNavigationList(title);
}
else if (elementType == DocumentElementType.List)
{
builder.StartList(title);
}
var items = line.Substring(startOfItems + NLPTextDocumentFormat.DOCUMENT_ELEMENT_ITEMS_START.Length).Split(new string[] { NLPTextDocumentFormat.DOCUMENT_ELEMENT_ITEMS_SEPARATOR }, StringSplitOptions.RemoveEmptyEntries);
foreach (var item in items)
{
var text = item.Trim();
if (!String.IsNullOrEmpty(text))
{
builder.StartListItem();
builder.AddTextBlock(text);
builder.EndListItem();
}
}
builder.EndList();
}
}
catch (Exception e)
{
throw new Exception($"File format error on line : {line.Substring(0, Math.Min(line.Length, 50))}");
}
}
else
{
throw new Exception($"File format error on line {line.Substring(0, Math.Min(line.Length, 50))}");
}
}
else
{
builder.AddTextBlock(line);
}
}
