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TxtReader.cs
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TxtReader.cs
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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using iTextSharp.text.pdf;
using iTextSharp.text.pdf.parser;
using Path = System.IO.Path;
namespace Plagiat
{
public class TxtReader
{
public static (List<string> sentences, string[] wordArray, string str) LoadSentences(string path, int sencenteLenght)
{
var sentences = new List<string>();
var str = LoadTxt(path);
var str1 = NormalizeString(str);
var wordArray = SplitString(str1);
for(var i = 0; i < wordArray.Length - sencenteLenght; i++)
{
var sentence = wordArray[i];
for(var j = 1; j < sencenteLenght; j++)
{
sentence += " " + wordArray[i + j];
}
sentences.Add(sentence);
}
return (sentences, wordArray, str);
}
public static string NormalizeString(string str)
{
var pattern = new Regex(@"(?:[a-zA-Z])\d+");
str = pattern.Replace(str, "");
return StripPunctuation(str).ToLower();
}
public static string[] SplitString(string str)
{
return str.Split(new string[] { " ", "\t", "\n", "\r", "\\t", "\\n" },
StringSplitOptions.RemoveEmptyEntries);
}
public static string LoadTxt(string path)
{
var sb = new StringBuilder();
using(StreamReader sr = new StreamReader(path))
{
sb.AppendLine(sr.ReadToEnd());
}
return sb.ToString();
}
public static void ExtractTextFromPdfToTxt(string path, string directoryPath)
{
using(PdfReader reader = new PdfReader(path))
{
StringBuilder text = new StringBuilder();
for(int i = 1; i <= reader.NumberOfPages; i++)
{
text.Append(PdfTextExtractor.GetTextFromPage(reader, i));
}
string fileName = directoryPath + Path.GetFileName(path) + ".txt";
fileName = fileName.Replace(".pdf", "");
if(!File.Exists(fileName))
{
File.WriteAllText(fileName, text.ToString());
}
}
}
public static List<string> CombineFollowingSencences(List<string> sentences, int count)
{
var newList = new List<string>();
for(var i = 0; i < sentences.Count; i++)
{
var current = sentences[i];
while(i + 1 < sentences.Count)
{
var next = sentences[i + 1];
var splited = current.Split(new char[] { ' ' });
var nextSplited = next.Split(new char[] { ' ' });
var matchTable = new bool[count - 1];
for(var j = count - 2; j >= 0; j--)
{
matchTable[j] = splited[j + 1 + splited.Length - count] == nextSplited[j];
}
if(matchTable.All(x => x == true))
{
current += " " + nextSplited[count - 1];
i++;
}
else
{
break;
}
}
newList.Add(current);
}
return newList;
}
public static string StripPunctuation(string s)
{
var sb = new StringBuilder();
foreach(char c in s)
{
if(!Char.IsPunctuation(c))
sb.Append(c);
}
return sb.ToString();
}
public static (MatchCollection badDates, MatchCollection goodDates) FindBadDateSpaces(string str)
{
var matches = Regex.Matches(str, @"[(]\d{4}[,][\d]*[)]");
var matches1 = Regex.Matches(str, @"[(]\d{4}[,][ ][\d]*[)]");
return (matches, matches1);
}
public static (MatchCollection matches, int wordCount, int wholeStringWordCount) CheckQuotes(string str)
{
MatchCollection matches = Regex.Matches(str, "“(.|\n)*?”");
int quoteWordsCount = 0;
foreach(Match match in matches)
{
var normalizedMatch = NormalizeString(match.ToString());
var wordArray = SplitString(normalizedMatch);
quoteWordsCount += wordArray.Length;
}
return (matches, quoteWordsCount, SplitString(str.Normalize()).Length);
}
}
}