/// <summary>
/// Helper method to read the conversation from <paramref name="inputFilePath"/>.
/// </summary>
/// <param name="inputFilePath">
/// The input file path.
/// </param>
/// <param name="userName">
/// The string representing the username to filter messages with.
/// </param>
/// <param name="keyword">
/// The string used in to match message content by keyword.
/// </param>
/// <param name="blacklist">
/// The strings to be blacklisted from message content.
/// </param>
/// <param name="encryptUsernames">
/// Boolean flag indicating whether to encrypt usernames or not.
/// </param>
/// <param name="hideNumbers">
/// Boolean flag indicating whether to hide numbers or not.
/// </param>
/// <returns>
/// A <see cref="Conversation"/> model representing the conversation.
/// </returns>
/// <exception cref="ArgumentException">
/// Thrown when the input file could not be found.
/// </exception>
/// <exception cref="Exception">
/// Thrown when something else went wrong.
/// </exception>
public Conversation ReadConversation(string inputFilePath, string userName, string keyword, string blacklist)
{
try
{
FileStream stream = new FileStream(inputFilePath, FileMode.Open, FileAccess.Read);
// using statement to properly dispose reader at end of scope.
using (StreamReader reader = new StreamReader(stream, Encoding.ASCII))
{
string conversationName = reader.ReadLine();
var messages = new List <Message>();
string line;
while ((line = reader.ReadLine()) != null)
{
Message msg = MessageGenerator.CreateNewMessage(line, blacklist);
if (MessageFilter.Filter(msg, userName, keyword))
{
// add the newly instantiated message in List.
messages.Add(msg);
}
}
return(new Conversation(conversationName, messages));
}
}
catch (FileNotFoundException)
{
throw new FileNotFoundException("The file was not found.");
}
catch (IOException)
{
throw new IOException("Something went wrong in the IO.");
}
}