/**
* The function search a page of data and return client with specific format
* { code, error, data: { result, total } }
*/
public static ResponseContacts search(string fileName, string term, int pageNumber, int pageSize)
{
ResponseContacts responseContacts = new ResponseContacts();
// File does not exist
if (!File.Exists(fileName))
{
responseContacts.code = 100;
responseContacts.error = String.Concat(fileName, " Not existed");
return(responseContacts);
}
List <Contact> contacts = Helpers.readFile(fileName);
// search not Ok
if (contacts == null)
{
responseContacts.code = 101;
responseContacts.error = String.Concat("Error occured while reading ", fileName);
return(responseContacts);
}
// filter data with specific page number
term = term.ToLower();
var query = contacts.Where(contact => (
((contact.firstName != null && contact.firstName.ToLower().IndexOf(term) >= 0) || term == String.Empty) ||
((contact.lastName != null && contact.lastName.ToLower().IndexOf(term) >= 0) || term == String.Empty) ||
((contact.phone != null && contact.phone.ToLower().IndexOf(term) >= 0) || term == String.Empty) ||
((contact.email != null && contact.email.ToLower().IndexOf(term) >= 0) || term == String.Empty)
));
contacts = query.ToList();
int total = contacts.Count;
responseContacts.data.total = total;
// extract data with specific page
int startIndex = (pageNumber - 1) * pageSize;
if (total > startIndex)
{
// canculate the range we will respond client based on pageSize and pageNumber
int count = total > (startIndex + pageSize) ? pageSize : total - ((pageNumber - 1) * pageSize);
contacts = contacts.GetRange(startIndex, count);
responseContacts.data.result = contacts;
}
return(responseContacts);
}
public ResponseContacts GetAllContacts()
{
ResponseContacts responseContacts = new ResponseContacts();
if (carsRepository.GetAllMessages().FirstOrDefault() == null)
{
responseContacts.Success = false;
responseContacts.Message = "ERROR: no contacts found";
}
else
{
responseContacts.Contacts = carsRepository.GetAllMessages();
responseContacts.Success = true;
responseContacts.Message = "Contacts found";
}
return(responseContacts);
}
