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Implement deep indexing for files through Xapian

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ATM it support extracting metadata only from OGG files.
The system has been designed to be easly extensible to more file formats
  registering more indexer functions which just need to extract metadata
  from a certain type of file and feed it to Xapian.
The system has been integrated into existent file search system to
  through generric search requests and results, it keep a good level of
  retro-compatibility due to some tricks.
The indexing system is released under AGPLv3  so when libretroshare is compiled
  with deep search enabled AGPLv3 must be honored instead of LGPLv3-or-later.
Cleaned up the debian copyright file using non-deprecated license
  code-names.
This commit is contained in:
Gioacchino Mazzurco 2019-06-20 17:24:18 +02:00
parent d46e3eb2b7
commit 3a26ccf6a5
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25 changed files with 1364 additions and 438 deletions
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77
libretroshare/src/deep_search/channelsindex.hpp Normal file
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/*******************************************************************************
* RetroShare full text indexing and search implementation based on Xapian *
* *
* Copyright (C) 2018-2019 Gioacchino Mazzurco <gio@eigenlab.org> *
* Copyright (C) 2019 Asociación Civil Altermundi <info@altermundi.net> *
* *
* This program is free software: you can redistribute it and/or modify *
* it under the terms of the GNU Affero General Public License version 3 as *
* published by the Free Software Foundation. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Affero General Public License for more details. *
* *
* You should have received a copy of the GNU Affero General Public License *
* along with this program. If not, see <https://www.gnu.org/licenses/>. *
* *
*******************************************************************************/
#pragma once
#include <vector>
#include <xapian.h>
#include "util/rstime.h"
#include "retroshare/rsgxschannels.h"
#include "retroshare/rsinit.h"
#include "util/rsurl.h"
struct DeepChannelsSearchResult
{
std::string mUrl;
double mWeight;
std::string mSnippet;
};
struct DeepChannelsIndex
{
/**
* @brief Search indexed GXS groups and messages
* @param[in] maxResults maximum number of acceptable search results, 0 for
* no limits
* @return search results count
*/
static uint32_t search( const std::string& queryStr,
std::vector<DeepChannelsSearchResult>& results,
uint32_t maxResults = 100 );
static void indexChannelGroup(const RsGxsChannelGroup& chan);
static void removeChannelFromIndex(RsGxsGroupId grpId);
static void indexChannelPost(const RsGxsChannelPost& post);
static void removeChannelPostFromIndex(
RsGxsGroupId grpId, RsGxsMessageId msgId );
static uint32_t indexFile(const std::string& path);
private:
enum : Xapian::valueno
{
/// Used to store retroshare url of indexed documents
URL_VALUENO,
/// @see Xapian::BAD_VALUENO
BAD_VALUENO = Xapian::BAD_VALUENO
};
static const std::string& dbPath()
{
static const std::string dbDir =
RsAccounts::AccountDirectory() + "/deep_search_xapian_db";
return dbDir;
}
};