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+/**
+ * @file llteleporthistorystorage.cpp
+ * @brief Teleport history
+ *
+ * $LicenseInfo:firstyear=2009&license=viewergpl$
+ *
+ * Copyright (c) 2009, Linden Research, Inc.
+ *
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab. Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ *
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ *
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ *
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#include "llviewerprecompiledheaders.h"
+
+#include "llteleporthistorystorage.h"
+
+#include "llsd.h"
+#include "llsdserialize.h"
+#include "lldir.h"
+#include "llteleporthistory.h"
+#include "llagent.h"
+
+// Max offset for two global positions to consider them as equal
+const F64 MAX_GLOBAL_POS_OFFSET = 5.0f;
+
+LLTeleportHistoryPersistentItem::LLTeleportHistoryPersistentItem(const LLSD& val)
+{
+ mTitle = val["title"].asString();
+ mGlobalPos.setValue(val["global_pos"]);
+ mDate = val["date"];
+}
+
+LLSD LLTeleportHistoryPersistentItem::toLLSD() const
+{
+ LLSD val;
+
+ val["title"] = mTitle;
+ val["global_pos"] = mGlobalPos.getValue();
+ val["date"] = mDate;
+
+ return val;
+}
+
+struct LLSortItemsByDate
+{
+ bool operator()(const LLTeleportHistoryPersistentItem& a, const LLTeleportHistoryPersistentItem& b)
+ {
+ return a.mDate < b.mDate;
+ }
+};
+
+LLTeleportHistoryStorage::LLTeleportHistoryStorage() :
+ mFilename("teleport_history.txt")
+{
+ LLTeleportHistory *th = LLTeleportHistory::getInstance();
+ if (th)
+ th->setHistoryChangedCallback(boost::bind(&LLTeleportHistoryStorage::onTeleportHistoryChange, this));
+
+ load();
+}
+
+LLTeleportHistoryStorage::~LLTeleportHistoryStorage()
+{
+}
+
+void LLTeleportHistoryStorage::onTeleportHistoryChange()
+{
+ LLTeleportHistory *th = LLTeleportHistory::getInstance();
+ if (!th)
+ return;
+
+ const LLTeleportHistoryItem &item = th->getItems()[th->getCurrentItemIndex()];
+
+ addItem(item.mTitle, item.mGlobalPos);
+ save();
+
+ mHistoryChangedSignal();
+}
+
+void LLTeleportHistoryStorage::purgeItems()
+{
+ mItems.clear();
+}
+
+void LLTeleportHistoryStorage::addItem(const std::string title, const LLVector3d& global_pos)
+{
+ addItem(title, global_pos, LLDate::now());
+}
+
+
+bool LLTeleportHistoryStorage::compareByTitleAndGlobalPos(const LLTeleportHistoryPersistentItem& a, const LLTeleportHistoryPersistentItem& b)
+{
+ return a.mTitle == b.mTitle && (a.mGlobalPos - b.mGlobalPos).length() < MAX_GLOBAL_POS_OFFSET;
+}
+
+void LLTeleportHistoryStorage::addItem(const std::string title, const LLVector3d& global_pos, const LLDate& date)
+{
+
+ LLTeleportHistoryPersistentItem item(title, global_pos, date);
+
+ slurl_list_t::iterator item_iter = std::find_if(mItems.begin(), mItems.end(),
+ boost::bind(&LLTeleportHistoryStorage::compareByTitleAndGlobalPos, this, _1, item));
+
+ // If there is such item already, remove it, since new item is more recent
+ if (item_iter != mItems.end())
+ {
+ mItems.erase(item_iter);
+ }
+
+ mItems.push_back(item);
+
+ // Check whether sorting is needed
+ if (mItems.size() > 1)
+ {
+ item_iter = mItems.end();
+
+ item_iter--;
+ item_iter--;
+
+ // If second to last item is more recent than last, then resort items
+ if (item_iter->mDate > item.mDate)
+ {
+ std::sort(mItems.begin(), mItems.end(), LLSortItemsByDate());
+ }
+ }
+}
+
+void LLTeleportHistoryStorage::removeItem(S32 idx)
+{
+ if (idx < 0 || idx >= (S32)mItems.size())
+ return;
+
+ mItems.erase (mItems.begin() + idx);
+}
+
+void LLTeleportHistoryStorage::save()
+{
+ // build filename for each user
+ std::string resolvedFilename = gDirUtilp->getExpandedFilename(LL_PATH_PER_SL_ACCOUNT, mFilename);
+
+ // open the history file for writing
+ llofstream file (resolvedFilename);
+ if (!file.is_open())
+ {
+ llwarns << "can't open teleport history file \"" << mFilename << "\" for writing" << llendl;
+ return;
+ }
+
+ for (size_t i=0; i<mItems.size(); i++)
+ {
+ LLSD s_item = mItems[i].toLLSD();
+ file << LLSDOStreamer<LLSDNotationFormatter>(s_item) << std::endl;
+ }
+
+ file.close();
+}
+
+void LLTeleportHistoryStorage::load()
+{
+ // build filename for each user
+ std::string resolved_filename = gDirUtilp->getExpandedFilename(LL_PATH_PER_SL_ACCOUNT, mFilename);
+
+ // open the history file for reading
+ llifstream file(resolved_filename);
+ if (!file.is_open())
+ {
+ llwarns << "can't load teleport history from file \"" << mFilename << "\"" << llendl;
+ return;
+ }
+
+ // remove current entries before we load over them
+ mItems.clear();
+
+ // the parser's destructor is protected so we cannot create in the stack.
+ LLPointer<LLSDParser> parser = new LLSDNotationParser();
+ std::string line;
+ while (std::getline(file, line))
+ {
+ LLSD s_item;
+ std::istringstream iss(line);
+ if (parser->parse(iss, s_item, line.length()) == LLSDParser::PARSE_FAILURE)
+ {
+ llinfos << "Parsing saved teleport history failed" << llendl;
+ break;
+ }
+
+ mItems.push_back(s_item);
+ }
+
+ file.close();
+
+ std::sort(mItems.begin(), mItems.end(), LLSortItemsByDate());
+}
+
+void LLTeleportHistoryStorage::dump() const
+{
+ llinfos << "Teleport history storage dump (" << mItems.size() << " items):" << llendl;
+
+ for (size_t i=0; i<mItems.size(); i++)
+ {
+ std::stringstream line;
+ line << i << ": " << mItems[i].mTitle;
+ line << " global pos: " << mItems[i].mGlobalPos;
+ line << " date: " << mItems[i].mDate;
+
+ llinfos << line.str() << llendl;
+ }
+}
+
+boost::signals2::connection LLTeleportHistoryStorage::setHistoryChangedCallback(history_callback_t cb)
+{
+ return mHistoryChangedSignal.connect(cb);
+}
+
+void LLTeleportHistoryStorage::goToItem(S32 idx)
+
+{
+ // Validate specified index.
+ if (idx < 0 || idx >= (S32)mItems.size())
+ {
+ llwarns << "Invalid teleport history index (" << idx << ") specified" << llendl;
+ dump();
+ return;
+ }
+
+ if (idx == (S32)mItems.size() - 1)
+ {
+ llwarns << "Will not teleport to the same location." << llendl;
+ dump();
+ return;
+ }
+
+ // Attempt to teleport to the requested item.
+ gAgent.teleportViaLocation(mItems[idx].mGlobalPos);
+}
+