/*
 * Copyright 2014 (c) Anna Schumaker.
 */
#include <index.h>


IndexEntry :: IndexEntry() {}
IndexEntry :: IndexEntry(const std::string &k)
	    : key(k)
{}

const std::string IndexEntry :: primary_key()
{
	return key;
}

void IndexEntry :: insert(unsigned int val)
{
	values.insert(val);
}

void IndexEntry :: remove(unsigned int val)
{
	values.erase(val);
}

void IndexEntry :: write(File &f)
{
	std::set<unsigned int>::iterator it;
	f << key << std::endl << values.size() << " ";
	for (it = values.begin(); it != values.end(); it++)
		f << *it << " ";
}

void IndexEntry :: read(File &f)
{
	unsigned int num, val;

	f >> key >> num;
	for (unsigned int i = 0; i < num; i++) {
		f >> val;
		insert(val);
	}
}



Index :: Index(const std::string &filepath, bool autosave)
	: Database(filepath, autosave)
{}

void Index :: insert(const std::string &key, unsigned int val)
{
	iterator it = find(key);
	if (it == end())
		it = at(Database :: insert(IndexEntry(key)));

	it->insert(val);
	autosave();
}

void Index :: remove(const std::string &key, unsigned int val)
{
	iterator it = find(key);

	if (it == end())
		return;

	it->remove(val);
	autosave();
}