main.cpp

#include <iostream>
#include <string>
#include <vector>
#include <windows.h>
#include <tlhelp32.h>
#include <fstream>
#include <chrono>

using namespace std;


int writeFile(wstring song)
{
    wofstream filestream;
    filestream.open ("curtitle.txt");
    filestream << "Song: " << song;
    filestream.close();
    return 0;
}

bool isSpotify(const PROCESSENTRY32W &entry) {
    return wstring(entry.szExeFile) == L"Spotify.exe";
}

BOOL CALLBACK enumWindowsProc(HWND hwnd, LPARAM lParam) {
    const auto &pids = *reinterpret_cast<vector<DWORD>*>(lParam);

    DWORD winId;
    GetWindowThreadProcessId(hwnd, &winId);

    for (DWORD pid : pids) {
        if (winId == pid) {
            wstring title(GetWindowTextLength(hwnd) + 1, L'\0');
            GetWindowTextW(hwnd, &title[0], title.size()); 

                if (title.find('-') != string::npos) {
                    wcout << "Song: " << title << "\n\n";
                    writeFile(title);
                }

        }
    }

    return TRUE;
}


int main() {
    vector<DWORD> pids;

    HANDLE snap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);

    PROCESSENTRY32W entry;
    entry.dwSize = sizeof entry;


    if (!Process32FirstW(snap, &entry)) {
        return 0;
    }

    int n = 2;
    int mil = n*1000;
    while(1) {

    do {
        if (isSpotify(entry)) {
            pids.emplace_back(entry.th32ProcessID);
        }
    } while (Process32NextW(snap, &entry));


    EnumWindows(enumWindowsProc, reinterpret_cast<LPARAM>(&pids));
    Sleep(mil);
    }
}