ocarina/core/tags/album.cpp

/**
 * Copyright 2014 (c) Anna Schumaker.
 */
extern "C" {
#include <core/string.h>
}
#include <core/tags/album.h>


static database<album> album_db;

static gchar *__album_key(const std::string &name, unsigned int year)
{
	return g_strdup_printf("%u %s", year, name.c_str());
}

static struct album *__album_from_key(const gchar *key)
{
	struct album *album = new struct album;
	gchar *name, *lower;

	if (sscanf(key, "%u %m[^\n]", &album->al_year, &name) == 1)
		name = g_strdup("");

	lower = string_lowercase(name);
	album->al_name  = name;
	album->al_lower = lower;

	g_free(name);
	g_free(lower);
	return album;
}


album :: album() : al_year(0), al_name("") {}

static struct db_entry *album_alloc(const gchar *key)
{
	return __album_from_key(key);
}

static void album_free(struct db_entry *dbe)
{
	delete (struct album *)dbe;
}

static gchar *album_key(struct db_entry *dbe)
{
	struct album *album = (struct album *)dbe;
	return __album_key(album->al_name, album->al_year);
}

static struct db_entry *album_read(struct file *file)
{
	gchar *line = file_readl(file);
	struct album *album = __album_from_key(line);
	g_free(line);
	return album;
}

static void album_write(struct file *file, struct db_entry *dbe)
{
	struct album *album = (struct album *)dbe;
	file_writef(file, "%u %s", album->al_year, album->al_name.c_str());
}


static const struct db_ops album_ops = {
	album_alloc,
	album_free,
	album_key,
	album_read,
	NULL,
	album_write,
};


void album_db_init()
{
	db_init(&album_db, "album.db", true, &album_ops);
	db_load(&album_db);
}

void album_db_deinit()
{
	db_deinit(&album_db);
}

struct album *album_find(const std::string &name, unsigned int year)
{
	gchar *key = __album_key(name, year);
	struct album *album = db_find(&album_db, key);
	g_free(key);
	return album;
}

struct album *album_get(const unsigned int index)
{
	return db_at(&album_db, index);
}

int album_compare(struct album *lhs, struct album *rhs)
{
	return string_compare(lhs->al_lower.c_str(), rhs->al_lower.c_str());
}

#ifdef CONFIG_TESTING
const struct db_ops *test_album_ops() { return &album_ops; }
#endif /* CONFIG_TESTING */