view rdf/PluginRDFIndexer.cpp @ 1247:8f076d02569a piper

Make SVDEBUG always write to a log file -- formerly this was disabled in NDEBUG builds. I think there's little use to that, it just means that we keep adding more cerr debug output because we aren't getting the log we need. And SVDEBUG logging is not usually used in tight loops, I don't think the performance overhead is too serious.

Also update the About box.

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2008-2012 QMUL.
   
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
    published by the Free Software Foundation; either version 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

#include "PluginRDFIndexer.h"

#include "data/fileio/CachedFile.h"
#include "data/fileio/FileSource.h"
#include "data/fileio/PlaylistFileReader.h"
#include "plugin/PluginIdentifier.h"

#include "base/Profiler.h"

#include <vamp-hostsdk/PluginHostAdapter.h>

#include <dataquay/BasicStore.h>
#include <dataquay/RDFException.h>

#include <QFileInfo>
#include <QDir>
#include <QUrl>
#include <QDateTime>
#include <QSettings>
#include <QFile>

#include <iostream>

using std::vector;
using std::string;
using Vamp::PluginHostAdapter;

using Dataquay::Uri;
using Dataquay::Node;
using Dataquay::Nodes;
using Dataquay::Triple;
using Dataquay::Triples;
using Dataquay::BasicStore;
using Dataquay::RDFException;
using Dataquay::RDFDuplicateImportException;

PluginRDFIndexer *
PluginRDFIndexer::m_instance = 0;

PluginRDFIndexer *
PluginRDFIndexer::getInstance() 
{
    if (!m_instance) m_instance = new PluginRDFIndexer();
    return m_instance;
}

PluginRDFIndexer::PluginRDFIndexer() :
    m_index(new Dataquay::BasicStore)
{
    m_index->addPrefix("vamp", Uri("http://purl.org/ontology/vamp/"));
    m_index->addPrefix("foaf", Uri("http://xmlns.com/foaf/0.1/"));
    m_index->addPrefix("dc", Uri("http://purl.org/dc/elements/1.1/"));
    indexInstalledURLs();
}

const BasicStore *
PluginRDFIndexer::getIndex()
{
    return m_index;
}

PluginRDFIndexer::~PluginRDFIndexer()
{
    QMutexLocker locker(&m_mutex);
}

void
PluginRDFIndexer::indexInstalledURLs()
{
    vector<string> paths = PluginHostAdapter::getPluginPath();

//    cerr << "\nPluginRDFIndexer::indexInstalledURLs: pid is " << getpid() << endl;

    QStringList filters;
    filters << "*.ttl";
    filters << "*.TTL";
    filters << "*.n3";
    filters << "*.N3";
    filters << "*.rdf";
    filters << "*.RDF";

    // Search each Vamp plugin path for an RDF file that either has
    // name "soname", "soname:label" or "soname/label" plus RDF
    // extension.  Use that order of preference, and prefer ttl over
    // n3 over rdf extension.

    for (vector<string>::const_iterator i = paths.begin(); i != paths.end(); ++i) {

        QDir dir(i->c_str());
        if (!dir.exists()) continue;

        QStringList entries = dir.entryList
            (filters, QDir::Files | QDir::Readable);

        for (QStringList::const_iterator j = entries.begin();
             j != entries.end(); ++j) {

            QFileInfo fi(dir.filePath(*j));
            pullFile(fi.absoluteFilePath());
        }

        QStringList subdirs = dir.entryList
            (QDir::AllDirs | QDir::NoDotAndDotDot | QDir::Readable);

        for (QStringList::const_iterator j = subdirs.begin();
             j != subdirs.end(); ++j) {

            QDir subdir(dir.filePath(*j));
            if (subdir.exists()) {
                entries = subdir.entryList
                    (filters, QDir::Files | QDir::Readable);
                for (QStringList::const_iterator k = entries.begin();
                     k != entries.end(); ++k) {
                    QFileInfo fi(subdir.filePath(*k));
                    pullFile(fi.absoluteFilePath());
                }
            }
        }
    }

    reindex();
}

bool
PluginRDFIndexer::indexConfiguredURLs()
{
    SVDEBUG << "PluginRDFIndexer::indexConfiguredURLs" << endl;

    QSettings settings;
    settings.beginGroup("RDF");
    
    QString indexKey("rdf-indices");
    QStringList indices = settings.value(indexKey).toStringList();
    
    for (int i = 0; i < indices.size(); ++i) {

        QString index = indices[i];

        SVDEBUG << "PluginRDFIndexer::indexConfiguredURLs: index url is "
                  << index << endl;

        CachedFile cf(index);
        if (!cf.isOK()) continue;

        FileSource indexSource(cf.getLocalFilename());

        PlaylistFileReader reader(indexSource);
        if (!reader.isOK()) continue;

        PlaylistFileReader::Playlist list = reader.load();
        for (PlaylistFileReader::Playlist::const_iterator j = list.begin();
             j != list.end(); ++j) {
            SVDEBUG << "PluginRDFIndexer::indexConfiguredURLs: url is "
                  << *j << endl;
            pullURL(*j);
        }
    }

    QString urlListKey("rdf-urls");
    QStringList urls = settings.value(urlListKey).toStringList();

    for (int i = 0; i < urls.size(); ++i) {
        pullURL(urls[i]);
    }
    
    settings.endGroup();
    reindex();
    return true;
}

QString
PluginRDFIndexer::getURIForPluginId(QString pluginId)
{
    QMutexLocker locker(&m_mutex);

    if (m_idToUriMap.find(pluginId) == m_idToUriMap.end()) return "";
    return m_idToUriMap[pluginId];
}

QString
PluginRDFIndexer::getIdForPluginURI(QString uri)
{
    m_mutex.lock();

    if (m_uriToIdMap.find(uri) == m_uriToIdMap.end()) {

        m_mutex.unlock();

        // Haven't found this uri referenced in any document on the
        // local filesystem; try resolving the pre-fragment part of
        // the uri as a document URL and reading that if possible.

        // Because we may want to refer to this document again, we
        // cache it locally if it turns out to exist.

        cerr << "PluginRDFIndexer::getIdForPluginURI: NOTE: Failed to find a local RDF document describing plugin <" << uri << ">: attempting to retrieve one remotely by guesswork" << endl;

        QString baseUrl = QUrl(uri).toString(QUrl::RemoveFragment);

        indexURL(baseUrl);

        m_mutex.lock();

        if (m_uriToIdMap.find(uri) == m_uriToIdMap.end()) {
            m_uriToIdMap[uri] = "";
        }
    }

    QString id = m_uriToIdMap[uri];
    m_mutex.unlock();
    return id;
}

QStringList
PluginRDFIndexer::getIndexedPluginIds() 
{
    QMutexLocker locker(&m_mutex);

    QStringList ids;
    for (StringMap::const_iterator i = m_idToUriMap.begin();
         i != m_idToUriMap.end(); ++i) {
        ids.push_back(i->first);
    }
    return ids;
}

bool
PluginRDFIndexer::pullFile(QString filepath)
{
    QUrl url = QUrl::fromLocalFile(filepath);
    QString urlString = url.toString();
    return pullURL(urlString);
}

bool
PluginRDFIndexer::indexURL(QString urlString)
{
    bool pulled = pullURL(urlString);
    if (!pulled) return false;
    reindex();
    return true;
}

bool
PluginRDFIndexer::pullURL(QString urlString)
{
    Profiler profiler("PluginRDFIndexer::indexURL");

//    cerr << "PluginRDFIndexer::indexURL(" << urlString << ")" << endl;

    QMutexLocker locker(&m_mutex);

    QUrl local = urlString;

    if (FileSource::isRemote(urlString) &&
        FileSource::canHandleScheme(urlString)) {

        CachedFile cf(urlString, 0, "application/rdf+xml");
        if (!cf.isOK()) {
            return false;
        }

        local = QUrl::fromLocalFile(cf.getLocalFilename());

    } else if (urlString.startsWith("file:")) {

        local = QUrl(urlString);

    } else {

        local = QUrl::fromLocalFile(urlString);
    }

    try {
        m_index->import(local, BasicStore::ImportFailOnDuplicates);
    } catch (RDFDuplicateImportException &e) {
        cerr << e.what() << endl;
        cerr << "PluginRDFIndexer::pullURL: Document at " << urlString
             << " duplicates triples found in earlier loaded document -- skipping it" << endl;
        return false;
    } catch (RDFException &e) {
        cerr << e.what() << endl;
        cerr << "PluginRDFIndexer::pullURL: Failed to import document from "
             << urlString << ": " << e.what() << endl;
        return false;
    }
    return true;
}

bool
PluginRDFIndexer::reindex()
{
    Triples tt = m_index->match
        (Triple(Node(), Uri("a"), m_index->expand("vamp:Plugin")));
    Nodes plugins = tt.subjects();

    bool foundSomething = false;
    bool addedSomething = false;

    foreach (Node plugin, plugins) {
        
        if (plugin.type != Node::URI) {
            cerr << "PluginRDFIndexer::reindex: Plugin has no URI: node is "
                 << plugin << endl;
            continue;
        }
        
        Node idn = m_index->complete
            (Triple(plugin, m_index->expand("vamp:identifier"), Node()));

        if (idn.type != Node::Literal) {
            cerr << "PluginRDFIndexer::reindex: Plugin " << plugin
                 << " lacks vamp:identifier literal" << endl;
            continue;
        }

        Node libn = m_index->complete
            (Triple(Node(), m_index->expand("vamp:available_plugin"), plugin));

        if (libn.type != Node::URI) {
            cerr << "PluginRDFIndexer::reindex: Plugin " << plugin 
                 << " is not vamp:available_plugin in any library" << endl;
            continue;
        }

        Node son = m_index->complete
            (Triple(libn, m_index->expand("vamp:identifier"), Node()));

        if (son.type != Node::Literal) {
            cerr << "PluginRDFIndexer::reindex: Library " << libn
                 << " lacks vamp:identifier for soname" << endl;
            continue;
        }

        QString pluginUri = plugin.value;
        QString identifier = idn.value;
        QString soname = son.value;

        QString pluginId = PluginIdentifier::createIdentifier
            ("vamp", soname, identifier);

        foundSomething = true;

        if (m_idToUriMap.find(pluginId) != m_idToUriMap.end()) {
            continue;
        }

        m_idToUriMap[pluginId] = pluginUri;

        addedSomething = true;

        if (pluginUri != "") {
            if (m_uriToIdMap.find(pluginUri) != m_uriToIdMap.end()) {
                cerr << "PluginRDFIndexer::reindex: WARNING: Found multiple plugins with the same URI:" << endl;
                cerr << "  1. Plugin id \"" << m_uriToIdMap[pluginUri] << "\"" << endl;
                cerr << "  2. Plugin id \"" << pluginId << "\"" << endl;
                cerr << "both claim URI <" << pluginUri << ">" << endl;
            } else {
                m_uriToIdMap[pluginUri] = pluginId;
            }
        }
    }

    if (!foundSomething) {
        cerr << "PluginRDFIndexer::reindex: NOTE: Plugins found, but none sufficiently described" << endl;
    }
    
    return addedSomething;
}