139 lines
3.9 KiB
C++
139 lines
3.9 KiB
C++
#include <iostream>
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#include <string>
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#include <curl/curl.h>
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#include <boost/json.hpp>
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#include <boost/json/src.hpp>
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#include <ncurses.h>
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static size_t WriteCallback(void *contents, size_t size, size_t nmemb, std::string *userp) {
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userp->append(static_cast<char*>(contents), size * nmemb);
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return size * nmemb;
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}
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double getConversionRate() {
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CURL *curl;
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CURLcode res;
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std::string readBuffer;
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double rate = 0.0;
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curl = curl_easy_init();
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if(curl) {
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curl_easy_setopt(curl, CURLOPT_URL, "https://api.coingecko.com/api/v3/simple/price?ids=solana&vs_currencies=usd");
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curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
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curl_easy_setopt(curl, CURLOPT_WRITEDATA, &readBuffer);
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res = curl_easy_perform(curl);
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curl_easy_cleanup(curl);
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if(res == CURLE_OK) {
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boost::json::error_code ec;
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auto parsed = boost::json::parse(readBuffer, ec);
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if(!ec) {
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auto& obj = parsed.as_object();
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rate = obj["solana"].as_object()["usd"].as_double();
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}
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}
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}
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return rate;
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}
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void displayMenu(WINDOW *menu_win, int highlight, const std::string choices[], int n_choices, double solRate) {
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int x = 2, y = 2;
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box(menu_win, 0, 0);
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mvwprintw(menu_win, 1, 1, "1 SOL = $%.2f", solRate);
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for(int i = 0; i < n_choices; ++i) {
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if(highlight == i + 1) {
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wattron(menu_win, A_REVERSE);
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mvwprintw(menu_win, y + 1, x, "%s", choices[i].c_str());
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wattroff(menu_win, A_REVERSE);
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} else
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mvwprintw(menu_win, y + 1, x, "%s", choices[i].c_str());
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++y;
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}
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wrefresh(menu_win);
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}
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void processChoice(int choice, double rate) {
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echo();
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if (choice == 1) {
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printw("Enter amount in SOL: ");
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double sol;
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scanw("%lf", &sol);
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printw("%.2f SOL is approximately %.2f USD.\n", sol, sol * rate);
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} else if (choice == 2) {
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printw("Enter amount in USD: ");
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double usd;
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scanw("%lf", &usd);
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printw("%.2f USD is approximately %.2f SOL.\n", usd, usd / rate);
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}
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noecho();
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}
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int main() {
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initscr();
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clear();
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noecho();
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cbreak();
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start_color();
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init_pair(1, COLOR_CYAN, COLOR_BLACK);
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double rate = getConversionRate();
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WINDOW *menu_win = newwin(7, 60, 4, 4);
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keypad(menu_win, TRUE);
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refresh();
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const std::string choices[] = {"Convert SOL to USD", "Convert USD to SOL", "Exit"};
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int n_choices = sizeof(choices) / sizeof(std::string);
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int highlight = 1;
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displayMenu(menu_win, highlight, choices, n_choices, rate);
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int choice = 0;
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int c;
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while(1) {
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c = wgetch(menu_win);
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switch(c) {
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case KEY_UP:
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if(highlight == 1)
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highlight = n_choices;
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else
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--highlight;
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break;
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case KEY_DOWN:
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if(highlight == n_choices)
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highlight = 1;
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else
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++highlight;
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break;
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case 10: {
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choice = highlight;
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clear();
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refresh();
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if (choice == 3) {
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endwin();
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return 0;
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}
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rate = getConversionRate();
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if (rate == 0.0) {
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printw("Failed to fetch conversion rate. Please try again later.\n");
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} else {
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processChoice(choice, rate);
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}
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printw("Press any key to return to the menu.");
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getch();
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clear();
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displayMenu(menu_win, highlight, choices, n_choices, rate);
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break;
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}
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default:
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break;
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}
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displayMenu(menu_win, highlight, choices, n_choices, rate);
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}
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endwin();
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return 0;
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} |