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/*
 * Copyright (c) 2010 Remko Tronçon
 * Licensed under the GNU General Public License v3.
 * See Documentation/Licenses/GPLv3.txt for more information.
 */

#include "MUCBookmarkManager.h"

#include <boost/bind.hpp>
#include <iostream>

#include <Swiften/Base/foreach.h>
#include "Swiften/Queries/IQRouter.h"
#include "Swiften/Queries/Requests/GetPrivateStorageRequest.h"
#include "Swiften/Queries/Requests/SetPrivateStorageRequest.h"


namespace Swift {

MUCBookmarkManager::MUCBookmarkManager(IQRouter* iqRouter) {
	iqRouter_ = iqRouter;
	ready_ = false;
	GetPrivateStorageRequest<Storage>::ref request = GetPrivateStorageRequest<Storage>::create(iqRouter_);
	request->onResponse.connect(boost::bind(&MUCBookmarkManager::handleBookmarksReceived, this, _1, _2));
	request->send();
}

void MUCBookmarkManager::handleBookmarksReceived(boost::shared_ptr<Storage> payload, ErrorPayload::ref error) {
	if (error) {
		return;
	}

	ready_ = true;
	onBookmarksReady();

	storage = payload;

	std::vector<MUCBookmark> receivedBookmarks;
	foreach (Storage::Room room, payload->getRooms()) {
		receivedBookmarks.push_back(MUCBookmark(room));
	}

	std::vector<MUCBookmark> newBookmarks;
	foreach (const MUCBookmark& oldBookmark, bookmarks_) {
		if (containsEquivalent(receivedBookmarks, oldBookmark)) {
			newBookmarks.push_back(oldBookmark);
		} else {
			onBookmarkRemoved(oldBookmark);
		} 
	}

	foreach (const MUCBookmark& newBookmark, receivedBookmarks) {
		if (!containsEquivalent(bookmarks_, newBookmark)) {
			newBookmarks.push_back(newBookmark);
			onBookmarkAdded(newBookmark);
		}
	}
	bookmarks_ = newBookmarks;
}

bool MUCBookmarkManager::containsEquivalent(const std::vector<MUCBookmark>& list, const MUCBookmark& bookmark) {
	return std::find(list.begin(), list.end(), bookmark) != list.end();
}

void MUCBookmarkManager::replaceBookmark(const MUCBookmark& oldBookmark, const MUCBookmark& newBookmark) {
	if (!ready_) return;
	for (size_t i = 0; i < bookmarks_.size(); i++) {
		if (bookmarks_[i] == oldBookmark) {
			bookmarks_[i] = newBookmark;
			flush();
			onBookmarkRemoved(oldBookmark);
			onBookmarkAdded(newBookmark);
			return;
		}
	}
}

void MUCBookmarkManager::addBookmark(const MUCBookmark& bookmark) {
	if (!ready_) return;
	bookmarks_.push_back(bookmark);
	onBookmarkAdded(bookmark);
	flush();
}


void MUCBookmarkManager::removeBookmark(const MUCBookmark& bookmark) {
	if (!ready_) return;
	std::vector<MUCBookmark>::iterator it;
	for (it = bookmarks_.begin(); it != bookmarks_.end(); it++) {
		if ((*it) == bookmark) {
			bookmarks_.erase(it);
			onBookmarkRemoved(bookmark);
			break;
		}
	}
	flush();
}

void MUCBookmarkManager::flush() {
	if (!storage) {
		storage = boost::shared_ptr<Storage>(new Storage());
	}
	// Update the storage element
	storage->clearRooms();
	foreach(const MUCBookmark& bookmark, bookmarks_) {
		storage->addRoom(bookmark.toStorage());
	}

	// Send an iq to save the storage element
	SetPrivateStorageRequest<Storage>::ref request = SetPrivateStorageRequest<Storage>::create(storage, iqRouter_);
	// FIXME: We should care about the result
	//request->onResponse.connect(boost::bind(&MUCBookmarkManager::handleBookmarksSet, this, _1, _2));
	request->send();
}

const std::vector<MUCBookmark>& MUCBookmarkManager::getBookmarks() const {
	return bookmarks_;
}

}