1 files changed, 220 insertions, 0 deletions

@@ -0,0 +1,220 @@
+#include <stdexcept>
+#include <vector>
+#include <string>
+#include <yaml-cpp/yaml.h>
+#include <sqlite3.h>
+#include <iostream>
+#include <fstream>
+#include <twitter.h>
+#include <chrono>
+#include <thread>
+#include <random>
+#include <list>
+#include "util.h"
+
+const std::vector<std::string> moods = {"party", "chill", "crazy", "happy", "sad", "instrumental", "vocal"};
+
+int main(int argc, char** argv)
+{
+  if (argc != 2)
+  {
+    std::cout << "usage: cadence [configfile]" << std::endl;
+    return -1;
+  }
+
+  std::string configfile(argv[1]);
+  YAML::Node config = YAML::LoadFile(configfile);
+  
+  // Set up the Twitter client.
+  twitter::auth auth;
+  auth.setConsumerKey(config["consumer_key"].as<std::string>());
+  auth.setConsumerSecret(config["consumer_secret"].as<std::string>());
+  auth.setAccessKey(config["access_key"].as<std::string>());
+  auth.setAccessSecret(config["access_secret"].as<std::string>());
+  
+  twitter::client client(auth);
+  
+  // Read in the forms file.
+  std::map<std::string, std::vector<std::string>> groups;
+  std::ifstream datafile(config["forms"].as<std::string>());
+  if (!datafile.is_open())
+  {
+    std::cout << "Could not find forms file." << std::endl;
+    return 1;
+  }
+  
+  bool newgroup = true;
+  std::string line;
+  std::string curgroup;
+  while (getline(datafile, line))
+  {
+    if (line.back() == '\r')
+    {
+      line.pop_back();
+    }
+    
+    if (newgroup)
+    {
+      curgroup = line;
+      newgroup = false;
+    } else {
+      if (line.empty())
+      {
+        newgroup = true;
+      } else {
+        groups[curgroup].push_back(line);
+      }
+    }
+  }
+
+  // Initialize the random number generator.
+  std::random_device random_device;
+  std::mt19937 random_engine{random_device()};
+  
+  // Connect to the AcousticBrainz data file.
+  sqlite3* ppdb = nullptr;
+  
+  if (sqlite3_open_v2(config["acoustic_datafile"].as<std::string>().c_str(), &ppdb, SQLITE_OPEN_READONLY, NULL) != SQLITE_OK)
+  {
+    // We still have to free the resources allocated. In the event that
+    // allocation failed, ppdb will be null and sqlite3_close_v2 will just
+    // ignore it.
+    sqlite3_close_v2(ppdb);
+
+    std::cout << "Could not open acoustic datafile." << std::endl;
+    
+    return 1;
+  }
+
+  for (;;)
+  {
+    std::cout << "Generating tweet..." << std::endl;
+    
+    std::string mood = moods[std::uniform_int_distribution<int>(0, moods.size()-1)(random_engine)];
+    
+    std::string songTitle;
+    std::string songArtist;
+    
+    sqlite3_stmt* ppstmt;
+    std::string query = "SELECT title, artist FROM songs WHERE category = ? ORDER BY RANDOM() LIMIT 1";
+
+    if (sqlite3_prepare_v2(ppdb, query.c_str(), query.length(), &ppstmt, NULL) != SQLITE_OK)
+    {
+      std::cout << "Error reading from acoustic datafile:" << std::endl;
+      std::cout << sqlite3_errmsg(ppdb) << std::endl;
+      
+      return 1;
+    }
+    
+    sqlite3_bind_text(ppstmt, 1, mood.c_str(), mood.length(), SQLITE_TRANSIENT);
+    
+    if (sqlite3_step(ppstmt) == SQLITE_ROW)
+    {
+      songTitle = reinterpret_cast<const char*>(sqlite3_column_blob(ppstmt, 0));
+      songArtist = reinterpret_cast<const char*>(sqlite3_column_blob(ppstmt, 1));
+    } else {
+      std::cout << "Error reading from acoustic datafile:" << std::endl;
+      std::cout << sqlite3_errmsg(ppdb) << std::endl;
+      
+      return 1;
+    }
+    
+    sqlite3_finalize(ppstmt);
+
+    std::string action = "{" + cadence::uppercase(mood) + "}";
+    int tknloc;
+    while ((tknloc = action.find("{")) != std::string::npos)
+    {
+      std::string token = action.substr(tknloc+1, action.find("}")-tknloc-1);
+      std::string modifier;
+      int modloc;
+      if ((modloc = token.find(":")) != std::string::npos)
+      {
+        modifier = token.substr(modloc+1);
+        token = token.substr(0, modloc);
+      }
+      
+      std::string canontkn;
+      std::transform(std::begin(token), std::end(token), std::back_inserter(canontkn), [] (char ch) {
+        return std::toupper(ch);
+      });
+      
+      std::string result;
+      if (canontkn == "\\N")
+      {
+        result = "\n";
+      } else if (canontkn == "ARTIST")
+      {
+        result = songArtist;
+      } else if (canontkn == "SONG")
+      {
+        result = "\"" + songTitle + "\"";
+      } else if (groups.count(canontkn)) {
+        auto& group = groups.at(canontkn);
+        std::uniform_int_distribution<int> dist(0, group.size() - 1);
+
+        result = group[dist(random_engine)];
+      } else {
+        std::cout << "Badly formatted forms file:" << std::endl;
+        std::cout << "No such form as " + canontkn << std::endl;
+        
+        return 1;
+      }
+      
+      if (modifier == "indefinite")
+      {
+        if ((result.length() > 1) && (isupper(result[0])) && (isupper(result[1])))
+        {
+          result = "an " + result;
+        } else if ((result[0] == 'a') || (result[0] == 'e') || (result[0] == 'i') || (result[0] == 'o') || (result[0] == 'u'))
+        {
+          result = "an " + result;
+        } else {
+          result = "a " + result;
+        }
+      }
+      
+      std::string finalresult;
+      if (islower(token[0]))
+      {
+        std::transform(std::begin(result), std::end(result), std::back_inserter(finalresult), [] (char ch) {
+          return std::tolower(ch);
+        });
+      } else if (isupper(token[0]) && !isupper(token[1]))
+      {
+        auto words = cadence::split<std::list<std::string>>(result, " ");
+        for (auto& word : words)
+        {
+          word[0] = std::toupper(word[0]);
+        }
+        
+        finalresult = cadence::implode(std::begin(words), std::end(words), " ");
+      } else {
+        finalresult = result;
+      }
+      
+      action.replace(tknloc, action.find("}")-tknloc+1, finalresult);
+    }
+    
+    if (action.size() <= 140)
+    {
+      try
+      {
+        client.updateStatus(action);
+        
+        std::cout << action << std::endl;
+      } catch (const twitter::twitter_error& e)
+      {
+        std::cout << "Twitter error: " << e.what() << std::endl;
+      }
+
+      std::cout << "Waiting..." << std::endl;
+    
+      std::this_thread::sleep_for(std::chrono::hours(1));
+    
+      std::cout << std::endl;
+    } else {
+      std::cout << "Tweet was too long, regenerating." << std::endl;
+    }
+  }
+}