cs-lab34/main.cpp

#include <iostream>
#include "histogram.h"
#include "svg.h"
#include <vector>
#include <curl/curl.h>
#include <sstream>

using namespace std;

struct Input
{
    vector<double> numbers;
    size_t bin_count{};
};

Input input_data(istream& sin, bool prompt = true)
{
    if (prompt){
        Input in;
        size_t number_count;
        cerr << "Input number count" << endl;
        sin >> number_count;
        in.numbers.resize(number_count);
        for (size_t i = 0; i < number_count; i++)
        {
            cerr << "Input number "<< i << endl;
            sin >> in.numbers[i];
        }
        cerr << "Input bin count" << endl;
        sin >> in.bin_count;
        return in;
    }
    else{
        Input in;
        size_t number_count;
        sin >> number_count;
        in.numbers.resize(number_count);
        for (size_t i = 0; i < number_count; i++)
        {
            sin >> in.numbers[i];
        }
        sin >> in.bin_count;
        return in;
    }
}

size_t
write_data(void* items, size_t item_size, size_t item_count, void* ctx) {
    size_t data_size = item_size * item_count;
    stringstream* buffer = reinterpret_cast<stringstream*>(ctx);
    buffer->write(reinterpret_cast<const char*>(items), data_size);
    return data_size;
}

Input
download(const string& address) {
    stringstream buffer;
    CURL* curl = curl_easy_init();
    
    if (curl) {
        CURLcode res;
        curl_easy_setopt(curl, CURLOPT_URL, address.c_str());
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
        res = curl_easy_perform(curl);
        if (res != CURLE_OK) {
            cout << curl_easy_strerror(res);
            exit(1);
        }
        curl_easy_cleanup(curl);
    }
    return input_data(buffer, false);
}

int main(int argc, char* argv[]) {
    Input in;
    string link, color = "";
    bool flag = false;
    if (argc == 2) {
        in = download(argv[1]);
    }
    else if (argc == 3) {
        cout << "Wrong argument, use correct input -stroke <color> or leave input empty" << endl;
        exit(2);
    }
    else if (argc > 3) {
        for (size_t i = 1; i < argc; i++) {
            string cur = argv[i];
            if (cur.find("://") != string::npos) {
                link = cur;
            }
            else if (i != argc - 1){
                string curm = argv[i+1];
                if (cur == "-stroke" && curm.find("://") == string::npos) {
                    flag = true;
                    color = curm;
                }
            }
            else if (cur == "-stroke" && i == (argc - 1)) {
                cout << "Wrong argument, use correct input -stroke <color> or leave input empty" << endl;
                exit(2);
            }
        }
        in = download(link);
    }
    else {
        in = input_data(cin, false);
    }
    auto bins = make_histogram(in.numbers, in.bin_count);
    show_histogram_svg(bins, color);
    return 0;
}