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//pirooz vahedian
#include <iostream>
using namespace std;
#include <fstream>
#include <string>
#include <cctype>
#include <algorithm>
class toLower {public: char operator() (char c) const {return tolower(c) ;}};
bool isValidLocalEmailCharacter(char c) { // to the left of @ sym
bool validCheck = false;
if ((c>='A' && c<='Z') || (c>='a' && c<='z') || (c>='0' && c<='9') || (c=='.') || (c=='!') || (c=='#') || (c=='$') || (c=='%') || (c=='&') || (c==39) || (c=='*') || (c=='+') || (c=='-') || (c=='/') || (c=='=') || (c=='?') || (c=='^') || (c=='_') || (c=='`') || (c=='{') || (c=='|') || (c=='}') || (c=='~'))
{
validCheck = true;
}
return validCheck;
}
bool isValidDomainEmailCharacter(char c) { // to the right of the @ sym
bool validCheck = false;
if ((c>='A' && c<='Z') || (c>='a' && c<='z') || (c>='0' && c<='9') || (c=='.') || (c=='-') || (c=='+'))
{
validCheck = true;
}
return validCheck;
}
bool isDuplicate(string theAddress, string* address, int SIZE) {
bool checkDuplicate = false;
for (int i = 0; i < SIZE; i++)
{
string convertedAddress1 = address[i];
transform(convertedAddress1.begin(), convertedAddress1.end(), convertedAddress1.begin(), toLower());
string convertedAddress2 = theAddress;
transform(convertedAddress2.begin(), convertedAddress2.end(), convertedAddress2.begin(), toLower());
if (convertedAddress1 == convertedAddress2) checkDuplicate = true;
}
return checkDuplicate;
}
int main() { // Entry point
ifstream fin;
ofstream fout;
// input file
string inputFile;
cout << "Enter input file: [ blank for default] ";
getline(cin, inputFile);
if (inputFile.length() == 0)
{
inputFile = "fileContainingEmails.txt";
cout << "fileContainingEmails.txt has been set as input" << endl;
}
// output file
string outputFile;
cout << "Enter output file: [blank for default] ";
getline(cin, outputFile);
if (outputFile.length() == 0)
{
cout << "copyPasteMyEmails.txt has been set as output file." << endl;
outputFile = "copyPasteMyEmails.txt";
}
// Read input file
fin.open(inputFile.c_str());
if (!fin.good()) throw "I/O error";
// make list
const int MAX_ADDRESSES = 1000; // capacity
int numAddresses = 0; // start empty
string address[MAX_ADDRESSES];
cout << endl;
while(fin.good()) // loop till end of text file is reached
{
string line;
getline(fin, line);
int startPosition = 0;
int endPosition = 0;
int numberOfPeriods = 0;
bool doublePeriod = false;
bool periodEndofSentence = false;
for(int i = 0; i < line.length(); i++) // check lines
{
if(line[i] == '@') // check characters to locate position of @ symbol
{
int atSym = i;
for(int m = atSym-1; m >= 0; m--) // go back from position of @ to beginning if needed
{
if(line[m] == '.') // count periods
{
if(line[m+1] == '.')
{
doublePeriod = true;
}
numberOfPeriods = numberOfPeriods + 1;
}
if(isValidLocalEmailCharacter(line[m]) == false) // check till invalid character is found
{
startPosition = m+1; // start point of the next string
break;
}
}
for(int p = atSym+1; p <= line.length(); p++) // start from position of @ to end
{
if(line[p] == '.') // count periods
{
if(line[p+1] == '.') // break if period is after @ symbol
{
doublePeriod = true;
}
numberOfPeriods = numberOfPeriods + 1;
}
if(isValidDomainEmailCharacter(line[p]) == false) // check till invalid character is found
{
endPosition = p;
break;
}
}
int addressLength = endPosition - startPosition; // Calculate length of address
string theAddress = line.substr (startPosition,addressLength); // Capture substring
cout << theAddress << endl;
// check emails, if valid add to list.
if (numAddresses < MAX_ADDRESSES) // check the list
{
if (numberOfPeriods > 0) // Check if enough periods exist
{
if ((line[startPosition] !='.') && (line[endPosition-1] !='.') || (line[endPosition] == ' ') && (line[endPosition-1] == '.')) // Does not start or end with period
{
if ((doublePeriod == false) && ( line[atSym+1] !='.')) // Does not have consecutive periods
{
if (addressLength < 254 && atSym - startPosition < 64 && endPosition - atSym < 253 ) // Restrict length
{
if (isDuplicate(theAddress,address,numAddresses) == false) // Skip duplicate addresses
{
address[numAddresses++] = theAddress; // Add to list
cout << " VALID" << endl;
}// if skip duplicate
else
{
cout << " INVALID! Duplicate." << endl;
}
} // if restrict length
else
{
cout << " INVALID! Max/min length expectation fail." << endl;
}
} // if double period
else
{
cout << " INVALID! Consecutive periods or period after @ symbol." << endl;
}
} // if start or end with period
else
{
cout << " INVALID! Starts or ends with a period." << endl;
}
}// if enough periods
else
{
cout << " INVALID! Not enough periods or email address incomplete." << endl;
}
numberOfPeriods = 0;
cout << endl;
}
}
}
} // While
fin.close();
if (numAddresses != 0) // open and write to the file if emails are found
{
fout.open(outputFile.c_str());
cout << "Addresses Saved"<< endl;
for (int i = 0; i < numAddresses; i++)
{
cout << address[i] << endl;
fout << address[i] << endl;
}
cout << endl;
cout << numAddresses << " emails were found and copied to the file " << outputFile << "." << endl;
cout << endl;
cout << "Open " << outputFile << " and copy its contents into the " << endl;
cout << "'to', 'cc', or 'bcc' field of any email message." << endl;
cout << endl;
cout << "please use the 'bcc' field to keep the emails private." << endl;
fout.close();
}
else // if no emails are in the file
{
cout << "The file doesnt have any emails. " << inputFile << endl;
}
return 0;
} // End Main
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