/// <summary>
/// get file name/path from command parameter,otherwise display an error mesasge
/// </summary>
/// <param name="args">commad parameters</param>
/// <param name="writeFilePath"></param>
/// <returns></returns>
public static NamesFile GetFile(string[] args, string writeFilePath)
{
NamesFile file = null;
//
//first command parameter is file name/path for reading names
//
int argsReadFileElementIndex = 0;
//
//create a error message object from the factory
//
IMessage errorMessage = MessageFactory.CreatMessage(Message.MessageType.Error);
//
//if command parameter is not suppied or file does not exist,give an error message on screen.
//otherwise return the file object
//
if (args.Length == 0 || string.IsNullOrEmpty(args[argsReadFileElementIndex]))
{
errorMessage.DisplayMessage("No unsorted names file path being supplied!");
}
else if (!File.Exists(args[argsReadFileElementIndex]))
{
errorMessage.DisplayMessage("File not existed " + args[argsReadFileElementIndex]);
}
else
{
file = new NamesFile(args[argsReadFileElementIndex], writeFilePath);
}
return(file);
}
/// <summary>
/// Write the list of name to storage
/// </summary>
/// <param name="file">file name and path</param>
/// <param name="names">list of name object</param>
public static void WriteNamesToStorage(NamesFile file, List <Name> names)
{
string namesString;
//
//create storage and message object from the factory
//
IStorage storage = StorageFactory.CreatStorage(file);
IMessage promptMessage = MessageFactory.CreatMessage(Message.MessageType.Prompt);
//
//convert list of name object to a string
//
namesString = NamesStringConverter.ConvertNamesToString(names);
//
//write names string to storage
//
storage.WriteData(namesString);
//
//give user a message of writing completion at the end
//
promptMessage.DisplayMessage("Writing data to " + file.WriteFilePath + " is completed");
}
/// <summary>
/// Help read data from a storage; convert data into list of name object
/// </summary>
/// <param name="file">storage file</param>
/// <returns></returns>
public static List <Name> ReadNamesFromStorage(NamesFile file)
{
string namesString;
List <Name> names;
//
//create storage and message object from the respective factories
//
IStorage storage = StorageFactory.CreatStorage(file);
IMessage promptMessage = MessageFactory.CreatMessage(Message.MessageType.Prompt);
//
//read name list into a string from a storage
//
namesString = storage.ReadData();
//
//make a list of name object from the names in string
//
names = NamesStringConverter.ConvertStringToNames(namesString);
//
//give a reading completion message on screen
//
promptMessage.DisplayMessage("Reading data from " + file.ReadFilePath + " is completed");
return(names);
}
static void Main(string[] args)
{
string FileNamePathToWrite;
ILogger logger = LogFactory.CreatLogger();
IMessage errorMessage = MessageFactory.CreatMessage(Message.MessageType.Error);
IDisplay display;
NamesFile file;
List <Name> names;
try
{
//
//Get file name/path from app.config
//
FileNamePathToWrite = ConfigurationManager.AppSettings["FileNamePathToWrite"];
//
//create screen display object from the factory
//
display = DisplayFactory.CreatDisplay();
//
//get file name and path for reading names from command parameter; file name and path for writing names to is set by program
//
file = FileInfoValidator.GetFile(args, FileNamePathToWrite);
//
//only proceed further if file is available
//
if (file != null)
{
//
// get list of name object by reading
//
names = ReadNamesHelper.ReadNamesFromStorage(file);
//
//do sorting on names
//
names = NameSorter.Sort(names);
//
//writing sorted names to a storage
//
WriteNamesHelper.WriteNamesToStorage(file, names);
//
//display sorted name list on screen
//
display.DisplayName(names);
}
}
catch (Exception ex)
{
logger.Log(ex.Message);
errorMessage.DisplayMessage(ex.Message);
}
}
