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#include "SimpleHandlers.hpp"
#include "Response.hpp"
#include <array>
#include <cctype>
#include <memory>
#include <string>
#include <iomanip>
#include <sstream>
#include <iostream>
#include <stdexcept>
using namespace Response;
Handler::json Handler::klingerHandler(std::string const &arguments, std::string const &session, void *payload) {
(void) payload;
return simple_response("Bonjour!");
}
Handler::json Handler::wikiHandler(std::string const &arguments, std::string const &session, void *payload) {
(void) payload;
std::vector<json> linkAnnotations;
linkAnnotations.emplace_back(create_annotation(Reply::AnnotationType::link, "Wikipedia"));
linkAnnotations.emplace_back(create_annotation(Reply::AnnotationType::underline));
std::vector<json> reply_vec;
reply_vec.emplace_back(create_text("Visit "));
reply_vec.emplace_back(create_text("https://eo.wikipedia.org/", std::move(linkAnnotations)));
reply_vec.emplace_back(create_text(" today!"));
return create_response(std::move(reply_vec), session, true);
}
Handler::json Handler::helpHandler(std::string const &arguments, std::string const &session, void *payload) {
auto commands = (std::vector<CommandHandler> *) payload;
std::vector<json> reply_vec;
reply_vec.emplace_back(create_text(
"Reading from the gospel according to saint N,\n"
"And you shall feast upon the fruits and vegetables as I do in the offering for they will make you strong.\n"
"\n"
"Dear my fellow users, these are my official commands, which are offered to my believers.\n"
"\n"));
for (auto const &itor : *commands) {
std::vector<json> commandAnnotations;
commandAnnotations.emplace_back(
create_annotation(Reply::AnnotationType::command, std::move(itor.get_description())));
reply_vec.emplace_back(create_text("- "));
reply_vec.emplace_back(create_text(itor.command, std::move(commandAnnotations)));
}
reply_vec.emplace_back(create_text(
"\n"
"Thanks for using me. Takk skal du ha.\n"
"Bussy\n"
"N"));
return create_response(std::move(reply_vec), session, true);
}
Handler::json Handler::stopHandler(std::string const &arguments, std::string const &session, void *payload) {
auto app = (crow::SimpleApp *) payload;
auto args = tokenizeArguments(arguments);
if (args.empty()) {
return simple_response("Needs PIN!", session, true);
}
int admin_pin;
std::ifstream infile("/root/.n_admin_pin");
if (!(infile >> admin_pin) || admin_pin != std::stoi(args.at(0))) {
return simple_response("No PIN registered on server, admin commands unavailable", session, true);
}
app->stop();
std::vector<json> annotations;
annotations.emplace_back(create_annotation(Reply::AnnotationType::bold));
std::vector<json> reply_vec;
reply_vec.emplace_back(create_text("stopped", std::move(annotations)));
return create_response(std::move(reply_vec), session, true);
}
json Handler::sayHandler(const std::string &arguments, const std::string &session, void *payload) {
(void) payload;
return simple_response(arguments, session, true);
}
std::string url_encode(std::string const &value) {
std::ostringstream escaped;
escaped.fill('0');
escaped << std::hex;
for (char c : value) {
// Keep alphanumeric and other accepted characters intact
if (isalnum(c) || c == '-' || c == '_' || c == '.' || c == '~') {
escaped << c;
continue;
}
// Any other characters are percent-encoded
escaped << std::uppercase;
escaped << '%' << std::setw(2) << int((unsigned char) c);
escaped << std::nouppercase;
}
return escaped.str();
}
std::string exec(const char* cmd) {
std::array<char, 128> buffer{};
std::string result;
std::unique_ptr<FILE, decltype(&pclose)> pipe(popen(cmd, "r"), pclose);
if (!pipe) {
throw std::runtime_error("popen() failed!");
}
while (fgets(buffer.data(), buffer.size(), pipe.get()) != nullptr) {
result += buffer.data();
}
return result;
}
json Handler::latexRenderHandler(std::string const &arguments, std::string const &session, void *payload) {
(void) payload;
std::string file = exec("mktemp");
std::string result = exec(("curl -s 'https://latex.codecogs.com/png.latex?" + url_encode(arguments) + "' "
"-H 'User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:78.0) Gecko/20100101 Firefox/78.0' "
"-H 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8' "
"-H 'Accept-Language: en-US,en;q=0.5' --compressed -H 'DNT: 1' -H 'Connection: keep-alive' "
"-H 'Upgrade-Insecure-Requests: 1' --output " + file).c_str());
return simple_response(result, session, true);
}
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