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#include "generator.h"
#include <stdexcept>
#include <iostream>
#include <fstream>
#include <dirent.h>
#include <json.hpp>
#include <hkutil/progress.h>
#include <hkutil/string.h>
namespace cadence {
namespace generator {
generator::generator(
std::string inputpath,
std::string outputpath) :
inputpath_(inputpath),
db_(outputpath, hatkirby::dbmode::create)
{
// Add directory separator to input path
if ((inputpath_.back() != '/') && (inputpath_.back() != '\\'))
{
inputpath_ += '/';
}
inputpath_ += "highlevel/";
}
void generator::run()
{
// Creates the datafile.
writeSchema();
// Scans the AcousticBrainz data dump and generates a list of all of the
// files in the dump.
scanDirectories();
// Parses each data file and enters it into the database.
parseData();
}
void generator::writeSchema()
{
std::ifstream file("schema.sql");
if (!file)
{
throw std::invalid_argument("Could not find database schema");
}
std::ostringstream schemaBuilder;
std::string line;
while (std::getline(file, line))
{
if (line.back() == '\r')
{
line.pop_back();
}
schemaBuilder << line;
}
std::string schema = schemaBuilder.str();
auto queries = hatkirby::split<std::list<std::string>>(schema, ";");
hatkirby::progress ppgs("Writing database schema...", queries.size());
for (std::string query : queries)
{
if (!queries.empty())
{
db_.execute(query);
}
ppgs.update();
}
}
void generator::scanDirectories()
{
std::cout << "Scanning AcousticBrainz dump..." << std::endl;
DIR* topdir;
if ((topdir = opendir(inputpath_.c_str())) == nullptr)
{
throw std::invalid_argument("Invalid AcousticBrainz data directory");
}
struct dirent* topent;
while ((topent = readdir(topdir)) != nullptr)
{
if (topent->d_name[0] != '.')
{
std::string directory = inputpath_ + topent->d_name + "/";
DIR* subdir;
if ((subdir = opendir(directory.c_str())) == nullptr)
{
throw std::invalid_argument(
"Invalid AcousticBrainz data directory");
}
struct dirent* subent;
while ((subent = readdir(subdir)) != nullptr)
{
if (subent->d_name[0] != '.')
{
std::string subdirectory = directory + subent->d_name + "/";
DIR* subsubdir;
if ((subsubdir = opendir(subdirectory.c_str())) == nullptr)
{
throw std::invalid_argument(
"Invalid AcousticBrainz data directory");
}
struct dirent* subsubent;
while ((subsubent = readdir(subsubdir)) != nullptr)
{
if (subsubent->d_name[0] != '.')
{
std::string datafile = subdirectory + subsubent->d_name;
datafiles_.push_back(datafile);
}
}
closedir(subsubdir);
}
}
closedir(subdir);
}
}
closedir(topdir);
}
void generator::parseData()
{
hatkirby::progress ppgs(
"Parsing AcousticBrainz data files...",
datafiles_.size());
for (std::string datafile : datafiles_)
{
ppgs.update();
nlohmann::json jsonData;
{
std::ifstream dataStream(datafile);
dataStream >> jsonData;
}
try
{
auto& hl = jsonData["highlevel"];
double danceable = hl["danceability"]["all"]["danceable"];
double acoustic = hl["mood_acoustic"]["all"]["acoustic"];
double aggressive = hl["mood_aggressive"]["all"]["aggressive"];
double electronic = hl["mood_electronic"]["all"]["electronic"];
double happy = hl["mood_happy"]["all"]["happy"];
double party = hl["mood_party"]["all"]["party"];
double relaxed = hl["mood_relaxed"]["all"]["relaxed"];
double sad = hl["mood_sad"]["all"]["sad"];
double instrumental = hl["voice_instrumental"]["all"]["instrumental"];
std::string title = jsonData["metadata"]["tags"]["title"][0];
std::string artist = jsonData["metadata"]["tags"]["artist"][0];
uint64_t songId = db_.insertIntoTable(
"songs",
{
{ "title", title },
{ "artist", artist }
});
std::list<std::string> moods;
// ~38%
if ((party > 0.5) || (danceable > 0.75))
{
moods.push_back("party");
}
// ~38%
if ((relaxed > 0.81) || (acoustic > 0.5))
{
moods.push_back("chill");
}
// ~42%
if ((aggressive > 0.5) || (electronic > 0.95))
{
moods.push_back("crazy");
}
// ~30%
if (happy > 0.5)
{
moods.push_back("happy");
}
// ~30%
if (sad > 0.5)
{
moods.push_back("sad");
}
// ~38%
if (instrumental > 0.9)
{
moods.push_back("instrumental");
}
// ~34%
if (instrumental < 0.2)
{
moods.push_back("vocal");
}
// ~1%
if (moods.empty())
{
moods.push_back("unknown");
}
for (const std::string& mood : moods)
{
db_.insertIntoTable(
"moods",
{
{ "song_id", static_cast<int>(songId) },
{ "mood", mood }
});
}
} catch (const std::domain_error& ex)
{
// Weird data. Ignore silently.
}
}
}
};
};
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