First push

.gitignore

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+solprice-cli

build.sh

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+g++ -std=c++17 main.cpp -o solprice-cli -lcurl -lncurses -lboost_system

main.cpp

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