public string AmazonReview(string wordText)
{
Dictionary <string, ReviewWord> reviewWordMap = dataTrainer.reviewWords;
StringBuilder builder = new StringBuilder();
Console.Write("Start Word: ");
ReviewWord word = reviewWordMap.ContainsKey(wordText) ? reviewWordMap[wordText] : null;
if (word == null)
{
return("Word not found");
}
while (word != null && word.Value != ReviewWord.lastWord)
{
builder.Append(word.Value);
char punctuation = word.getPunctuation();
if (punctuation != (char)0)
{
builder.Append(word.getPunctuation());
}
builder.Append(" ");
word = word.getNextWord();
}
return(builder.ToString());
}
public void trainReviewData()
{
string filePath = Path.Combine(Environment.CurrentDirectory, string.Format("{0}\\{1}", config["DataDirectory"], config["DataFile"]));
Dictionary <string, ReviewWord> reviewWordMap = new Dictionary <string, ReviewWord>();
//File doesn't yet exist. Download and extract it
if (!File.Exists(filePath))
{
downloadWordData(filePath);
}
//Read the file line by line and parse the json into ReviewWord objects
using (FileStream fileStream = File.OpenRead(filePath))
{
using (StreamReader reader = new StreamReader(fileStream, Encoding.UTF8, true))
{
string line;
while ((line = reader.ReadLine()) != null)
{
JObject o = JObject.Parse(line);
string[] reviewText = o["reviewText"].ToString().ToLower().Split(new char[] { ' ', ';', ':' });
for (int i = 0; i < reviewText.Length; i += 2)
{
string text = reviewText[i];
char punctuation;
if (parsePunctuation(text, out punctuation))
{
text = text.Substring(0, text.Length - 1);
}
if (text.Trim() == "")
{
continue;
}
ReviewWord reviewWord = AddReviewWord(reviewWordMap, text, punctuation);
if (reviewWord == null)
{
continue;
}
string nextWord = i < reviewText.Length - 1 ? reviewText[i + 1].Trim() : ReviewWord.lastWord;
parsePunctuation(nextWord, out punctuation);
if (nextWord.Trim() != "")
{
reviewWord.addNextWord(AddReviewWord(reviewWordMap, nextWord, punctuation));
}
}
}
}
}
this._reviewWords = reviewWordMap;
}
private static ReviewWord AddReviewWord(Dictionary <string, ReviewWord> reviewWordMap, string text, char punctuation)
{
if (text.Length == 1 && ReviewWord.punctuations.Contains(text[0]))
{
return(null);
}
bool exists = reviewWordMap.ContainsKey(text);
ReviewWord reviewWord = !exists ? new ReviewWord(text) : reviewWordMap[text];
if (!exists)
{
reviewWordMap.Add(text, reviewWord);
reviewWord.trackUsage();
reviewWord.trackPunctuation(punctuation);
}
return(reviewWord);
}
