503 lines
10 KiB
C++
503 lines
10 KiB
C++
/*
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* This file is a part of Winix
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* and is distributed under the 2-Clause BSD licence.
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* Author: Tomasz Sowa <t.sowa@ttmath.org>
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*/
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/*
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* Copyright (c) 2010-2014, Tomasz Sowa
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "tdb.h"
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#include "core/log.h"
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namespace Winix
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{
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namespace Thread
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{
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Error TDb::AddThread(const Thread & thread)
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{
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query.Clear();
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query << R("insert into plugins.thread (file_id, replies, last_item, closed) values (")
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<< thread.file_id
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<< thread.replies
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<< thread.last_item_id
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<< (thread.closed ? 1 : 0 )
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<< R(");");
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return DoCommand(query);
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}
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void TDb::SetThreadColumns(PGresult * r)
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{
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cfile_id = AssertColumn(r, "file_id");
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creplies = AssertColumn(r, "replies");
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cclosed = AssertColumn(r, "closed");
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clast_item = AssertColumn(r, "last_item");
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cdate_modification = AssertColumn(r, "date_modification");
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cuser_id = AssertColumn(r, "user_id");
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cguest = AssertColumn(r, "guest_name");
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}
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void TDb::SetThread(PGresult * r, int col, Thread & thread)
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{
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thread.file_id = AssertValueLong(r, col, cfile_id);
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thread.replies = AssertValueLong(r, col, creplies);
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thread.closed = AssertValueBool(r, col, cclosed);
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thread.last_item_id = AssertValueLong(r, col, clast_item);
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thread.last_item_date_modification = AssertValueDate(r, col, cdate_modification);
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thread.last_item_user_id = AssertValueLong(r, col, cuser_id);
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AssertValueWide(r, col, cguest, thread.last_item_guest_name);
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}
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Error TDb::GetThread(long file_id, Thread & thread)
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{
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PGresult * r = 0;
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Error status = WINIX_ERR_OK;
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try
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{
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query.Clear();
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query << R("select thread.file_id, thread.replies, thread.closed, thread.last_item, "
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"item.date_modification, item.user_id, item.guest_name "
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"from plugins.thread left join core.item on thread.last_item = item.id "
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"where thread.file_id = ") << file_id << R(";");
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r = AssertQuery(query);
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AssertResult(r, PGRES_TUPLES_OK);
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int rows = Rows(r);
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if( rows > 1 )
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log << log1 << "ThreadDb: there is more than one thread with file_id: " << file_id << logend;
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else
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if( rows == 0 )
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throw Error(WINIX_ERR_NO_THREAD);
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SetThreadColumns(r);
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SetThread(r, 0, thread);
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}
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catch(const Error & e)
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{
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status = e;
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}
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ClearResult(r);
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return status;
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}
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Error TDb::GetThreads(const std::vector<long> & file_id_tab, std::vector<Thread> & thread_tab)
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{
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PGresult * r = 0;
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Error status = WINIX_ERR_OK;
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thread_tab.clear();
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if( file_id_tab.empty() )
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return status;
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try
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{
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CreateIdList(file_id_tab, list_id);
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// they should be sorted by file_id (they are used in a binary search later)
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query.Clear();
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query << R("select thread.file_id, thread.replies, thread.closed, thread.last_item, "
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"item.date_modification, item.user_id, item.guest_name "
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"from plugins.thread left join core.item on thread.last_item = item.id "
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"where thread.file_id in ") << R(list_id) << R(" order by file_id asc;");
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r = AssertQuery(query);
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AssertResult(r, PGRES_TUPLES_OK);
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int rows = Rows(r);
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SetThreadColumns(r);
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for(int i=0 ; i<rows ; ++i)
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{
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SetThread(r, i, thread_temp);
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thread_tab.push_back(thread_temp);
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}
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}
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catch(const Error & e)
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{
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status = e;
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}
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ClearResult(r);
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return status;
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}
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Error TDb::GetAnswers(long file_id, std::vector<long> & answer_id_tab)
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{
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PGresult * r = 0;
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Error status = WINIX_ERR_OK;
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answer_id_tab.clear();
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try
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{
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query.Clear();
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query << R("select answer_id from plugins.thread_files "
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"where file_id = ") << file_id << R(";");
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r = AssertQuery(query);
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AssertResult(r, PGRES_TUPLES_OK);
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int rows = Rows(r);
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answer_id_tab.resize(rows);
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for(int i=0 ; i<rows ; ++i)
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answer_id_tab[i] = AssertValueLong(r, i, 0);
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}
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catch(const Error & e)
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{
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status = e;
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}
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ClearResult(r);
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return status;
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}
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Error TDb::AddAnswer(long file_id, long answer_id)
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{
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query.Clear();
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query << R("insert into plugins.thread_files (file_id, answer_id) values (")
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<< file_id
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<< answer_id
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<< R(");");
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Error status = DoCommand(query);
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if( status != WINIX_ERR_OK )
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return status;
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query.Clear();
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query << R("update plugins.thread set (last_item, replies) = (")
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<< answer_id
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<< R(", replies+1) where file_id=")
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<< file_id
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<< R(";");
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return DoCommand(query);
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}
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long TDb::FindLastAnswer(long file_id)
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{
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PGresult * r = 0;
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//Error status = WINIX_ERR_OK;
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long last_item_id = -1;
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try
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{
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query.Clear();
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query << R("select id from plugins.thread_files left join core.item on item.id=answer_id where file_id=")
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<< file_id
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<< R(" order by date_creation desc limit 1;");
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r = AssertQuery(query);
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AssertResult(r, PGRES_TUPLES_OK);
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if( Rows(r) == 1 )
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last_item_id = AssertValueLong(r, 0, 0);
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}
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catch(const Error & e)
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{
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//status = e;
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}
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ClearResult(r);
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return last_item_id;
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}
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Error TDb::RemoveAnswer(long answer_id)
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{
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PGresult * r1 = 0;
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PGresult * r2 = 0;
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Error status = WINIX_ERR_OK;
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try
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{
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// selecting files which have answer_id as an answer
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query.Clear();
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query << R("select file_id from plugins.thread_files where answer_id = ")
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<< answer_id
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<< R(";");
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r1 = AssertQuery(query);
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AssertResult(r1, PGRES_TUPLES_OK);
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int rows = Rows(r1);
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file_id_tab.resize(rows);
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for(int i=0 ; i<rows ; ++i)
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file_id_tab[i] = AssertValueLong(r1, i, 0);
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// deleting those answers
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query.Clear();
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query << R("delete from plugins.thread_files where answer_id = ")
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<< answer_id
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<< R(";");
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r2 = AssertQuery(query);
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AssertResult(r2, PGRES_COMMAND_OK);
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rows = AffectedRows(r2);
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if( rows > 0 )
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log << log2 << "ThreadDb: deleted " << rows << " rows from plugins.thread_files" << logend;
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// setting new last_items to the files
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status = RemoveAnswerRecalcLast(file_id_tab);
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}
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catch(const Error & e)
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{
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status = e;
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}
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ClearResult(r1);
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ClearResult(r2);
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return status;
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}
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Error TDb::RemoveAnswerRecalcLast(long file_id)
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{
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long last_item_id = FindLastAnswer(file_id);
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query.Clear();
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query << R("update plugins.thread set (replies, last_item) = (replies-1,")
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<< last_item_id
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<< R(") where file_id=")
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<< file_id
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<< R(";");
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return DoCommand(query);
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}
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Error TDb::RemoveAnswerRecalcLast(const std::vector<long> & file_id_tab)
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{
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for(size_t i=0 ; i<file_id_tab.size() ; ++i)
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{
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long file_id = file_id_tab[i];
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Error status = RemoveAnswerRecalcLast(file_id);
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if( status != WINIX_ERR_OK )
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return status;
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}
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return WINIX_ERR_OK;
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}
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Error TDb::RecalcThread(long file_id)
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{
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long replies = CalcAnswers(file_id);
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long last_item = FindLastAnswer(file_id);
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query.Clear();
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query << R("update plugins.thread set (replies, last_item) = (")
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<< replies
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<< last_item
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<< R(") where file_id=")
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<< file_id
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<< R(";");
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return DoCommand(query);
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}
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long TDb::CalcAnswers(long file_id)
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{
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PGresult * r = 0;
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long answers = 0;
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try
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{
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query.Clear();
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query << R("select count(file_id) from plugins.thread_files where file_id=") << file_id << R(";");
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r = AssertQuery(query);
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AssertResult(r, PGRES_TUPLES_OK);
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if( Rows(r) == 1 )
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answers = AssertValueLong(r, 0, 0);
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}
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catch(const Error &)
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{
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}
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ClearResult(r);
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return answers;
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}
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Error TDb::RemoveThread(long file_id)
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{
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PGresult * r = 0;
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Error status = WINIX_ERR_OK;
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try
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{
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query.Clear();
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query << R("delete from plugins.thread where file_id=") << file_id << R(";");
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r = AssertQuery(query);
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AssertResult(r, PGRES_COMMAND_OK);
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long rows = AffectedRows(r);
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if( rows > 0 )
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log << log2 << "ThreadDb: deleted " << rows << " rows from plugins.thread" << logend;
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ClearResult(r);
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query.Clear();
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query << R("delete from plugins.thread_files where file_id=") << file_id << R(";");
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r = AssertQuery(query);
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AssertResult(r, PGRES_COMMAND_OK);
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rows = AffectedRows(r);
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if( rows > 0 )
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log << log2 << "ThreadDb: deleted " << rows << " rows from plugins.thread_files" << logend;
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}
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catch(const Error & e)
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{
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status = e;
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}
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ClearResult(r);
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return status;
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}
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Error TDb::RemoveAnswerOnly(long answer_id)
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{
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PGresult * r = 0;
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Error status = WINIX_ERR_OK;
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try
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{
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query.Clear();
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query << R("delete from plugins.thread_files where answer_id=") << answer_id << R(";");
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r = AssertQuery(query);
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AssertResult(r, PGRES_COMMAND_OK);
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long rows = AffectedRows(r);
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if( rows > 0 )
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log << log2 << "ThreadDb: deleted " << rows << " rows from plugins.thread_files" << logend;
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}
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catch(const Error & e)
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{
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status = e;
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}
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ClearResult(r);
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return status;
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}
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void TDb::GetAllThreadsId(std::vector<long> & file_id)
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{
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PGresult * r = 0;
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file_id.clear();
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try
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{
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query.Clear();
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query << R("select file_id from plugins.thread;");
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r = AssertQuery(query);
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AssertResult(r, PGRES_TUPLES_OK);
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int rows = Rows(r);
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file_id.resize(rows);
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for(int i=0 ; i<rows ; ++i)
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file_id[i] = AssertValueLong(r, i, 0);
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}
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catch(const Error &)
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{
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}
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ClearResult(r);
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}
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} // namespace
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} // namespace Winix
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