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//libraries
#include<algorithm>
#include <deque>
#include <iostream>
#include<string>
#include<fstream>
using namespace std;
#include<cctype>
struct EmailList
{
string anEmail;
}; // EmailList
// required for conversion to lowercase
class toLower {public: char operator()(char c) const {return tolower(c);}};
//Programmer defined data types
//NONE
//Special compiler dependent definitions
//NONE
//global constants/variables
//NONE
//Programmer defined functions
void introduction()
{
// output my name and objective and program information
cout << "The purpose of the program is to extract email addresses embedded in the first (input) text file,and copy them to the second (output) text file.\n";
cout << "Programmer: Toraaglobal\n";
cout << "Editor(s) used: Notepad\n";
cout << "Compiler(s) used: MinGW\n";
cout << "File: " << __FILE__ << endl;
cout << "Complied: " << __DATE__ << " at " << __TIME__ << endl << endl;
} // introduction
bool isValidEmailCharacter (char c)
{
bool result = false;
if (c == '_' || c== '.') result = true;
if (c == '-' || c == '+') result = true;
if (c >='a' && c <= 'z' )result = true;
if( c >= 'A' && c <= 'Z')result = true;
if (c >= '0' && c<= '9') result = true;
return result;
}//isValidEmailCharacter
bool hasDot(char c)
{
bool result = false;
if(c=='.') result = true;
return result;
}//hasDot
//main program
int main()
{
//program introduction
introduction();
//variables
string dFilename; // default input file name
string IFile; // the user input file name using the console
string OFile; // the user output file name using the console
string userrespond; // user respond to continue
ifstream fin ; // required for file input
ofstream fout; // required for file output
string line; // each line in the input file
int i=0; // loop counter
int s ; // to count backward until a non valid character is found
int e ; // to count forward until a non valid character is found
bool isdot; //use to confirm a dot
int numberOfEmail = 0;
bool dupe;
string temp; // to temporary store the valid email to check for duclicate
string temp2; // use to check for duclicate
EmailList aEmailList;
string validEmail;
// promt user for file input or use default input file
dFilename = "fileContainingEmails.txt";
cout<<"Enter input filename [default: fileContainingEmails.txt]: "<<endl;
getline(cin,IFile);
if(IFile.length() ==0)
{
IFile = dFilename;
}
else
{
IFile = IFile;
}
// promt the user for output file
dFilename = "copyPasteMyEmails.txt";
cout<<"Enter output filename [default: copyPasteMyEmails.txt]: "<<endl;
getline(cin,OFile);
if(OFile.length() == 0)
{
OFile = dFilename;
}
else
{
OFile =OFile;
}
// output user working files
cout<<"Your input file name is : "<<IFile<<endl;
cout<<"Your output file name is : "<<OFile<<endl;
// promt the user to continue the program
cout << "Press Enter Key to continue: ";
getline(cin,userrespond);
// open the input file
fin.open(IFile.c_str());
if(!fin.good())cout<<"Invalid file : "<<IFile<<endl;
deque<EmailList> emailList; // create an emty list
// read the input file
while(fin.good())
{
getline(fin, line);
for(i=0; i< line.length() ; i++)
{
if (line[i] =='@')
{
for( s= i-1;s > -1 ; s--)
{
if(isValidEmailCharacter(line[s]) == false)break;
}//for
s = s+1;
isdot = false;
for(e = i+1; e < line.length(); e++)
{
if(!isdot) isdot = hasDot(line[e]);
if(isValidEmailCharacter(line[e]) == false)break;
}//for
if(s<i && e>i && isdot )
{
temp = line.substr(s, e-s);
validEmail = line.substr(s, e-s);
dupe=false;
for(i = 0 ; i< emailList.size();i++)
{
temp2= emailList[i].anEmail;
transform(temp.begin(), temp.end(), temp.begin(), toLower());
transform(temp2.begin(), temp2.end(), temp2.begin(), toLower());
if(temp == temp2) dupe=true;
}//for
if(dupe==true)break;
aEmailList.anEmail = validEmail;
emailList.push_back(aEmailList);
}
}
}//for close
}// while close
fin.close();
if(emailList.size() == 0)
{
cout<<endl;
cout<<"Sorry, no email addresses were found in the "<<IFile<<endl;
}//if
else
{
cout<<endl;
fout.open(OFile.c_str());
if(!fout.good())throw "I/O error";
for(i=0; i < emailList.size();i++)
{
cout<<emailList[i].anEmail<<endl;
fout<<emailList[i].anEmail<<"; ";
}
cout<<endl;
cout<<emailList.size()<<" email addresses were found, and copied to the "<<OFile<<endl;
cout<<endl;
cout<<"OPen the "<<OFile<<" and copy and paste the email address to the cc or bcc,";
cout<<" but bcc will be better because others will not see the list of all the recipient";
cout<<" which also protect the privacy of individual "<<endl;
fout.close();
}//else
} //main
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