static void readData()
{
if (File.Exists(path))
{
string[] lines = System.IO.File.ReadAllLines(path);
//string line = string.Empty;
PersonData p = null;
PhoneData ph = null;
int i = 1;
for (int j = 0; j < lines.Count() ;j++ )
{
string line = lines[j];
string[] spline = line.Split(' ');
//if a person
if (spline.Count() > 1)
{
//add old one
if (p != null)
{
PersonData1.Add(p);
}
//is a person
p = new PersonData();
p.PersonNo = Convert.ToInt16(spline[0]);
p.Name = spline[1];
i = 1;
}
else
{
//is a phone no
p.CountPhoneNo++;
ph = new PhoneData();
ph.no = p.PersonNo;
ph.PhoneNumber = spline[0];
ph.phoneOrder = i;
i= i+1;
PhoneData1.Add(ph);
//insert into hash table
InsertHashTable(ph);
if (j == lines.Count() - 1)
{
//add old one
if (p != null)
{
PersonData1.Add(p);
}
}
}
}
}
}
static void modify()
{
//modify data
//show old list
Console.WriteLine("the list is:");
showList(null);
//get replace person phone no.
Console.Write("Enter the person id to be modified or any key to cancel :");
string no = Console.ReadLine();
int Personid;
if(int.TryParse(no,out Personid))
{
Console.Write("Enter the phone number id to be modified :");
string phoneno = Console.ReadLine();
int phoneNum;
bool isPhoneNum = int.TryParse(phoneno,out phoneNum);
if (isPhoneNum)
{
int indexPerson = PersonData1.FindIndex(i=> i.PersonNo == Personid);
if (phoneNum <= PersonData1[indexPerson].CountPhoneNo)
{
Console.Write("Enter the new phone number :");
string phonenumber = Console.ReadLine();
string disph1 = phonenumber.Substring(0, 3) + " " + phonenumber.Substring(3, 3) + " " + phonenumber.Substring(6, 4);
//compare
int indexPhone = PhoneData1.FindIndex(i => i.phoneOrder == phoneNum && i.no == Personid);
string number = PhoneData1[indexPhone].PhoneNumber;
string disph2 = number.Substring(0, 3) + " " + number.Substring(3, 3) + " " + number.Substring(6, 4);
Console.Write("Do you want to modify " + PersonData1[indexPerson].Name + "'s contact from " + disph2 + " to " + disph1 + " ('/y'/ for yes, any key to cancel)? :");
string checkY = Console.ReadLine();
//if 'y' replace phone number
if ("yY".Contains(checkY))
{
//old phone no
PhoneData ph = new PhoneData();
ph.no = Personid;
ph.PhoneNumber = number;
ph.phoneOrder = phoneNum;
DeleteHashTable(ph);
PhoneData1[indexPhone].PhoneNumber = phonenumber;
//new phone no
ph.PhoneNumber = phonenumber;
InsertHashTable(ph);
//show new list
Console.WriteLine("The new list is :");
showList(null);
}
//else do nothing
}
else
{
Console.WriteLine("Error there is no phone id for modify, please input new command");
}
}
else
{
Console.WriteLine("Error it is not a phone number, please input new command");
}
}
}
static void insert()
{
bool m = false;
string x = string.Empty;
string newList = "The new list is:";
do
{
Console.Write("Enter a phone number to be inserted: ");
x = Console.ReadLine();
x = x.Trim();
int y = x.Length;
if (y > 10)
Console.WriteLine("Error - the number is too long");
else if (y < 10)
Console.WriteLine("Error - the number is too short");
else
{
m = true;
foreach (PhoneData item in PhoneData1)
{
if (String.Compare(item.PhoneNumber, x) == 0)
{
Console.WriteLine("Error - the phone number is already in this phone book.");
m = false;
}
}
}
} while (m == false);
Console.WriteLine("The list is:");
showList(null);
//Show for Enter input new person or not
Console.Write("Enter the person id to append the phone number or 'n' for new phone number :");
string inputNP = Console.ReadLine();
int no;
//if it new person
if ("nN".Contains(inputNP))
{
Console.Write("Enter the name (8 Characters maximum) :");
string inputName = Console.ReadLine();
while (inputName.Length > 8)
{
Console.Write("Error name is more that 8 Characters, Please Enter new name:");
inputName = Console.ReadLine();
}
//insert new name
PersonData p = new PersonData();
p.PersonNo = PersonData1.Count + 1;
p.Name = inputName;
p.CountPhoneNo++;
PersonData1.Add(p);
//insert new phone no. to list
PhoneData ph = new PhoneData();
ph.no = p.PersonNo;
ph.PhoneNumber = x;
ph.phoneOrder = 1;
PhoneData1.Add(ph);
//add key to hashtable
InsertHashTable(ph);
//print new list
Console.WriteLine(newList);
showList(null);
}
else if (int.TryParse(inputNP, out no) == true)
{
int noIndex = PersonData1.FindIndex(i => i.PersonNo == no);
//checking is it full 5 phone no for that person
//if it full show error and input the replace no for replace that phone no
if (PersonData1[noIndex].CountPhoneNo == 5)
{
Console.Write(PersonData1[noIndex].Name + " has 5 phone numbers already,"+Environment.NewLine+" enter replaced number or any key for cancel:");
string inputRC = Console.ReadLine();
int tryParseInputRC;
//if not cancel replace that phone no to another one
if (int.TryParse(inputRC, out tryParseInputRC))
{
//replace and remove key of that phone no. from hash table
//int indexperson = PersonData1.FindIndex(i => i.PersonNo == PersonData1[no].PersonNo);
PhoneData ph = new PhoneData();
ph.no = no;
int indexphone = PhoneData1.FindIndex(i => i.phoneOrder == tryParseInputRC);
ph.PhoneNumber = PhoneData1[indexphone].PhoneNumber;
ph.phoneOrder = tryParseInputRC;
PhoneData ph2 = new PhoneData();
ph2.no = ph.no;
ph2.PhoneNumber = x;
ph2.phoneOrder = ph.phoneOrder;
PhoneData1[indexphone] = ph2;
//delete hash table data
DeleteHashTable(ph);
//insert new hash table data
InsertHashTable(ph2);
//show new list
Console.WriteLine(newList);
showList(null);
}
}
else
{
Console.Write("Enter replaced number or 'n' for new phone number:");
string inputPHID = Console.ReadLine();
if ("nN".Contains(inputPHID))
{
//add new phone number and position
PhoneData ph = new PhoneData();
ph.phoneOrder = PersonData1[noIndex].CountPhoneNo + 1;
ph.no = no;
ph.PhoneNumber = x;
PhoneData1.Add(ph);
PersonData1[noIndex].CountPhoneNo++;
//increase phone item in person
int indexPer = PersonData1.FindIndex(i => i.PersonNo == no);
//insert phone no to hash table
InsertHashTable(ph);
}
else
{
int phoneN;
bool isNumberic = int.TryParse(inputPHID, out phoneN);
//ask to replace phone no.
if (phoneN <= PersonData1[noIndex].CountPhoneNo && phoneN > 0)
{
int j = 0;
for (int i = 0; i < PhoneData1.Count; i++)
{
if (PhoneData1[i].phoneOrder == phoneN && PhoneData1[i].no == no)
{
j = i;
break;
}
}
string pp1;
string p1 = PhoneData1[j].PhoneNumber;
pp1 = p1;
p1 = p1.Substring(0, 3) + " " + p1.Substring(3, 3) + " " + p1.Substring(6, 4);
string p2 = x;
p2 = p2.Substring(0, 3) + " " + p2.Substring(3, 3) + " " + p2.Substring(6, 4);
Console.Write("Do you want to replace " + PersonData1[noIndex].Name + "'s contact " + p1 + " with " + p2 +Environment.NewLine+ " ('y' for yes, any key to cancel)? :");
string checkR = Console.ReadLine();
if ("yY".Contains(checkR))
{
//replace that phone no.
PhoneData ph1 = new PhoneData();
ph1.no = no;
ph1.PhoneNumber = x.Trim();
ph1.phoneOrder = phoneN;
PhoneData1[j] = ph1;
PhoneData ph2 = new PhoneData();
ph2.no = no;
ph2.PhoneNumber = pp1;
ph2.phoneOrder = phoneN;
//remove hash table about that phone no.
DeleteHashTable(ph2);
//insert new hash table of this phone no.
InsertHashTable(ph1);
}
}
else
{
//insert phone no in next position
PhoneData ph = new PhoneData();
ph.PhoneNumber = x;
ph.no = no;
ph.phoneOrder = PersonData1[noIndex].CountPhoneNo + 1;
PhoneData1.Add(ph);
//insert to hash table
InsertHashTable(ph);
}
}
//print new list
Console.WriteLine(newList);
showList(null);
}
}
}
static void InsertHashTable(PhoneData ph)
{
string key;
for (int i = 0; i < 7; i++)
{
key = ph.PhoneNumber.Substring(i, 3);
// value = person index
if (Hash.ContainsKey(key))
{
string x = Hash[key].ToString();
string[] m = x.Split(' ');
bool isHavInHashing = false;
foreach (string item in m)
{
if (Convert.ToInt16(item) == ph.no)
{
isHavInHashing = true;
break;
}
}
if (!isHavInHashing)
{
// add phone person no to hashing
Hash[key] = Hash[key].ToString() + " " + ph.no.ToString();
}
}
else
{
Hash.Add(key, ph.no.ToString());
}
}
}
static void DeleteHashTable(PhoneData ph)
{
string key;
for (int i = 0; i < 7; i++)
{
key = ph.PhoneNumber.Substring(i, 3);
if (Hash[key] != null && Hash[key].ToString() != string.Empty)
{
string x = Hash[key].ToString();
string[] item = x.Split(' ');
bool isHavSameHash = false;
foreach (string m in item)
{
//if the same person
if (ph.no == Convert.ToInt16(m))
{
foreach (PhoneData photh in PhoneData1)
{
if (photh.no == ph.no && ph.PhoneNumber != photh.PhoneNumber)
{
isHavSameHash = true;
break;
}
}
}
}
x = string.Empty;
if (!isHavSameHash)
{
for (int j = 0; j < item.Length; j++)
{
if (ph.no == Convert.ToInt16(item[j]))
{
item[j] = string.Empty;
}
x = x + item[j] + " ";
}
}
Hash[key] = x;
if (Hash[key].ToString().Trim().Length == 0)
{
Hash.Remove(key);
}
}
}
}