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#include <yaml-cpp/yaml.h>
#include <twitter.h>
#include <fstream>
#include <thread>
#include <chrono>
#include <iostream>
#include <algorithm>
// Sync followers every 4 hours.
const int CHECK_FOLLOWERS_EVERY = 4 * 60 / 5;
int main(int argc, char** argv)
{
if (argc != 2)
{
std::cout << "usage: snitch [configfile]" << std::endl;
return -1;
}
std::string configfile(argv[1]);
YAML::Node config = YAML::LoadFile(configfile);
twitter::auth auth(
config["consumer_key"].as<std::string>(),
config["consumer_secret"].as<std::string>(),
config["access_key"].as<std::string>(),
config["access_secret"].as<std::string>());
std::ifstream img_file(config["image"].as<std::string>());
img_file.seekg(0, std::ios::end);
size_t img_len = img_file.tellg();
char* img_buf = new char[img_len];
img_file.seekg(0, std::ios::beg);
img_file.read(img_buf, img_len);
img_file.close();
std::vector<std::string> triggers {
"calling the cops",
"calling the police",
"call the cops",
"call the police"
};
auto startedTime = std::chrono::system_clock::now();
// Initialize the client
twitter::client client(auth);
std::set<twitter::user_id> friends;
int followerTimeout = 0;
for (;;)
{
if (followerTimeout == 0)
{
// Sync friends with followers.
try
{
friends = client.getFriends();
std::set<twitter::user_id> followers = client.getFollowers();
std::list<twitter::user_id> oldFriends;
std::set_difference(
std::begin(friends),
std::end(friends),
std::begin(followers),
std::end(followers),
std::back_inserter(oldFriends));
std::list<twitter::user_id> newFollowers;
std::set_difference(
std::begin(followers),
std::end(followers),
std::begin(friends),
std::end(friends),
std::back_inserter(newFollowers));
for (twitter::user_id f : oldFriends)
{
client.unfollow(f);
}
for (twitter::user_id f : newFollowers)
{
client.follow(f);
}
} catch (const twitter::twitter_error& error)
{
std::cout << "Twitter error while syncing followers: " << error.what()
<< std::endl;
}
followerTimeout = CHECK_FOLLOWERS_EVERY;
}
followerTimeout--;
try
{
// Poll the timeline.
std::list<twitter::tweet> tweets = client.getHomeTimeline().poll();
for (twitter::tweet& tweet : tweets)
{
auto createdTime =
std::chrono::system_clock::from_time_t(tweet.getCreatedAt());
if (
// Only monitor people you are following
friends.count(tweet.getAuthor().getID()) &&
// Ignore tweets from before the bot started up
createdTime > startedTime)
{
std::string orig = tweet.getText();
std::string canonical;
std::transform(
std::begin(orig),
std::end(orig),
std::back_inserter(canonical),
[] (char ch) {
return std::tolower(ch);
});
for (const std::string& trigger : triggers)
{
if (canonical.find(trigger) != std::string::npos)
{
std::cout << "Calling the cops on @"
<< tweet.getAuthor().getScreenName() << std::endl;
try
{
long media_id =
client.uploadMedia(
"image/jpeg",
static_cast<const char*>(img_buf),
img_len);
client.replyToTweet(
tweet.generateReplyPrefill(client.getUser()),
tweet.getID(),
{media_id});
} catch (const twitter::twitter_error& e)
{
std::cout << "Twitter error while tweeting: " << e.what()
<< std::endl;
}
break;
}
}
}
}
} catch (const twitter::rate_limit_exceeded&)
{
// Wait out the rate limit (10 minutes here and 5 below = 15).
std::this_thread::sleep_for(std::chrono::minutes(10));
}
// We can poll the timeline at most once every five minutes.
std::this_thread::sleep_for(std::chrono::minutes(5));
}
}
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