149 lines
4.6 KiB
C++
149 lines
4.6 KiB
C++
/* This file is part of mastodonpp.
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* Copyright © 2020 tastytea <tastytea@tastytea.de>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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// Get the last 4 public statuses of an instance and process them with
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// nlohmann-json. <https://github.com/nlohmann/json>
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#if __has_include("mastodonpp.hpp")
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# include "mastodonpp.hpp" // We're building mastodonpp.
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#else
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# include <mastodonpp/mastodonpp.hpp> // We're building outside mastodonpp.
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#endif
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// Don't compile if nlohmann-json can't be found.
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#if __has_include(<nlohmann/json.hpp>)
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# include <nlohmann/json.hpp>
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#include <cstdlib>
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#include <iostream>
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#include <string>
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#include <string_view>
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#include <vector>
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namespace masto = mastodonpp;
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using json = nlohmann::json;
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using std::exit;
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using std::cout;
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using std::cerr;
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using std::to_string;
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using std::string_view;
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using std::vector;
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void handle_error(const masto::answer_type &answer);
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int main(int argc, char *argv[])
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{
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const vector<string_view> args(argv, argv + argc);
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if (args.size() <= 1)
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{
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cerr << "Usage: " << args[0] << " <instance hostname>\n";
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return 1;
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}
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try
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{
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// Initialize Instance and Connection.
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masto::Instance instance{args[1], {}};
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masto::Connection connection{instance};
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// Get the last 4 public statuses of the instance.
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auto answer{connection.get(masto::API::v1::timelines_public,
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{
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{"limit", "4"},
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{"local", "true"}
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})};
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if (answer)
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{
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// Parse JSON string.
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auto statuses{json::parse(answer.body)};
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for (const auto &status : statuses)
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{
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// Extract the info we want and print it.
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const auto acct{status["account"]["acct"].get<string_view>()};
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const auto content{status["content"].get<string_view>()};
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const auto id{status["id"].get<string_view>()};
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cout << acct << " wrote status " << id << ": \n";
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cout << " " << content.substr(0, 76) << " …\n";
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// Print tags if there are any.
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const auto tags{status["tags"]};
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if (!tags.empty())
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{
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cout << " Tags: ";
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for (const auto &tag : tags)
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{
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cout << '#' << tag["name"].get<string_view>() << " ";
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}
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cout << '\n';
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}
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// Print the number of attachments.
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const auto n_attachments{status["media_attachments"].size()};
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if (n_attachments > 0)
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{
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cout << " " << n_attachments << " attachment";
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if (n_attachments > 1)
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{
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cout << "s";
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}
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cout << ".\n";
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}
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}
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}
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else
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{
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handle_error(answer);
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}
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}
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catch (const masto::CURLException &e)
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{
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// Only libcurl errors that are not network errors will be thrown.
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// There went probably something wrong with the initialization.
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cerr << e.what() << '\n';
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}
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catch (const nlohmann::detail::exception &e)
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{
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cerr << "JSON exception: " << e.what() << '\n';
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}
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}
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void handle_error(const masto::answer_type &answer)
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{
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if (answer.curl_error_code == 0)
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{
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// If it is no libcurl error, it must be an HTTP error.
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cerr << "HTTP status: " << answer.http_status << '\n';
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}
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else
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{
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// Network errors like “Couldn't resolve host.”.
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cerr << "libcurl error " << to_string(answer.curl_error_code)
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<< ": " << answer.error_message << '\n';
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}
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exit(1);
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}
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#else
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#include <iostream>
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int main()
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{
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std::cout << "Example could not be compiled "
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"because nlohmann-json was not found.\n";
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}
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#endif // __has_include(<nlohmann/json.hpp>)
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