ocarina/core/deck.cpp

/**
 * Copyright 2013 (c) Anna Schumaker.
 */
extern "C" {
#include <core/collection.h>
#include <core/history.h>
}
#include <core/deck.h>
#include <core/file.h>
#include <glib.h>

static GSList *tempq_list;
static struct file deck_file;


void tempq_init(struct queue_ops *ops)
{
	unsigned int flags, count, j, id;
	unsigned int num, i;
	struct queue *queue;

	file_init(&deck_file, "deck", 1);
	if (!file_open(&deck_file, OPEN_READ))
		return;
	if (file_version(&deck_file) < 1)
		return;

	file_readf(&deck_file, "%u", &num);
	for (i = 0; i < num; i++) {
		file_readf(&deck_file, "%u %u", &flags, &count);
		queue = tempq_alloc(NULL, flags);
		for (j = 0; j < count; j++) {
			file_readf(&deck_file, "%u", &id);
			queue_add(queue, track_get(id));
		}
		queue->q_ops = ops;
	}
	file_close(&deck_file);
}

void tempq_deinit()
{
	GSList *cur;

	for (cur = tempq_list; cur; cur = g_slist_next(cur)) {
		queue_deinit((struct queue *)cur->data);
		delete (struct queue *)cur->data;
	}

	g_slist_free(tempq_list);
	tempq_list = NULL;
}

void tempq_save(struct queue *queue, enum queue_flags flag)
{
	unsigned int i;
	GSList *cur;

	if (!file_open(&deck_file, OPEN_WRITE))
		return;

	file_writef(&deck_file, "%zu\n", g_slist_length(tempq_list));
	for (cur = tempq_list; cur; cur = g_slist_next(cur)) {
		queue = (struct queue *)cur->data;
		file_writef(&deck_file, "%u %zu", queue->q_flags, queue_size(queue));
		for (i = 0; i < queue_size(queue); i++) {
			file_writef(&deck_file, " %u",
				    queue_at(queue, i)->tr_dbe.dbe_index);
		}
		file_writef(&deck_file, "\n");
	}

	file_close(&deck_file);
}

struct queue *tempq_alloc(struct queue_ops *ops, unsigned int flags)
{
	struct queue *queue = new struct queue;

	tempq_list = g_slist_append(tempq_list, queue);
	queue_init(queue, flags | Q_ENABLED | Q_SAVE_FLAGS | Q_SAVE_SORT, ops);
	tempq_save(queue, Q_ENABLED);
	return queue;
}

void tempq_free(struct queue *queue)
{
	tempq_list = g_slist_remove(tempq_list, queue);
	queue_deinit(queue);
	tempq_save(queue, Q_ENABLED);
	delete queue;
}

struct queue *tempq_get(unsigned int index)
{
	return (struct queue *)g_slist_nth_data(tempq_list, index);
}

void tempq_move(struct queue *queue, unsigned int index)
{
	GSList *cur = g_slist_find(tempq_list, queue);
	GSList *nth = g_slist_nth(tempq_list, index);
	if (cur && nth && (cur != nth)) {
		tempq_list = g_slist_remove(tempq_list, queue);
		tempq_list = g_slist_insert_before(tempq_list, nth, queue);
		tempq_save(queue, Q_ENABLED);
	}
}

struct track *tempq_next()
{
	struct track *track = NULL;
	struct queue *queue = NULL;
	GSList *cur;

	for (cur = tempq_list; cur; cur = g_slist_next(cur)) {
		queue = (struct queue *)cur->data;
		if (queue_has_flag(queue, Q_ENABLED)) {
			track = queue_next(queue);
			break;
		}
	}

	if (queue && queue_size(queue) == 0)
		tempq_free(queue);
	return track;
}

unsigned int tempq_count()
{
	return g_slist_length(tempq_list);
}