Add WebUI search API controller

Closes #2495.

src/base/search/searchpluginmanager.cpp

@@ -187,8 +187,6 @@ void SearchPluginManager::updatePlugin(const QString &name)
 // Install or update plugin from file or url
 void SearchPluginManager::installPlugin(const QString &source)
 {
-    qDebug("Asked to install plugin at %s", qUtf8Printable(source));
-
     clearPythonCache(engineLocation());
 
     if (Utils::Misc::isUrl(source)) {
@@ -215,12 +213,10 @@ void SearchPluginManager::installPlugin(const QString &source)
 
 void SearchPluginManager::installPlugin_impl(const QString &name, const QString &path)
 {
-    PluginVersion newVersion = getPluginVersion(path);
+    const PluginVersion newVersion = getPluginVersion(path);
-    qDebug() << "Version to be installed:" << newVersion;
-
     PluginInfo *plugin = pluginInfo(name);
     if (plugin && !(plugin->version < newVersion)) {
-        qDebug("Apparently update is not needed, we have a more recent version");
+        LogMsg(tr("Plugin already at version %1, which is greater than %2").arg(plugin->version, newVersion), Log::INFO);
         emit pluginUpdateFailed(name, tr("A more recent version of this plugin is already installed."));
         return;
     }
@@ -242,6 +238,7 @@ void SearchPluginManager::installPlugin_impl(const QString &name, const QString
     if (!m_plugins.contains(name)) {
         // Remove broken file
         Utils::Fs::forceRemove(destPath);
+        LogMsg(tr("Plugin %1 is not supported.").arg(name), Log::INFO);
         if (updated) {
             // restore backup
             QFile::copy(destPath + ".bak", destPath);
@@ -256,10 +253,12 @@ void SearchPluginManager::installPlugin_impl(const QString &name, const QString
     }
     else {
         // Install was successful, remove backup
-        if (updated)
+        if (updated) {
+            LogMsg(tr("Plugin %1 has been successfully updated.").arg(name), Log::INFO);
             Utils::Fs::forceRemove(destPath + ".bak");
         }
     }
+}
 
 bool SearchPluginManager::uninstallPlugin(const QString &name)
 {
@@ -494,10 +493,8 @@ void SearchPluginManager::update()
 
 void SearchPluginManager::parseVersionInfo(const QByteArray &info)
 {
-    qDebug("Checking if update is needed");
-
     QHash<QString, PluginVersion> updateInfo;
-    bool dataCorrect = false;
+    int numCorrectData = 0;
     QList<QByteArray> lines = info.split('\n');
     foreach (QByteArray line, lines) {
         line = line.trimmed();
@@ -514,15 +511,15 @@ void SearchPluginManager::parseVersionInfo(const QByteArray &info)
         PluginVersion version = PluginVersion::tryParse(list.last(), {});
         if (version == PluginVersion()) continue;
 
-        dataCorrect = true;
+        ++numCorrectData;
         if (isUpdateNeeded(pluginName, version)) {
-            qDebug("Plugin: %s is outdated", qUtf8Printable(pluginName));
+            LogMsg(tr("Plugin %1 is outdated").arg(pluginName), Log::INFO);
             updateInfo[pluginName] = version;
         }
     }
 
-    if (!dataCorrect)
+    if (numCorrectData < lines.size())
-        emit checkForUpdatesFailed(tr("An incorrect update info received."));
+        emit checkForUpdatesFailed(tr("Incorrect update info received for %1 out of %2 plugins.").arg((lines.size() - numCorrectData), lines.size()));
     else
         emit checkForUpdatesFinished(updateInfo);
 }
@@ -533,7 +530,6 @@ bool SearchPluginManager::isUpdateNeeded(QString pluginName, PluginVersion newVe
     if (!plugin) return true;
 
     PluginVersion oldVersion = plugin->version;
-    qDebug() << "IsUpdate needed? to be installed:" << newVersion << ", already installed:" << oldVersion;
     return (newVersion > oldVersion);
 }
 

src/gui/search/searchwidget.cpp

@@ -226,7 +226,6 @@ void SearchWidget::selectActivePage()
 SearchWidget::~SearchWidget()
 {
     qDebug("Search destruction");
-    delete SearchPluginManager::instance();
     delete m_ui;
 }
 
@@ -279,7 +278,7 @@ void SearchWidget::giveFocusToSearchInput()
 // Function called when we click on search button
 void SearchWidget::on_searchButton_clicked()
 {
-    if (Utils::ForeignApps::pythonInfo().version.majorNumber() <= 0) {
+    if (!Utils::ForeignApps::pythonInfo().isValid()) {
         m_mainWindow->showNotificationBaloon(tr("Search Engine"), tr("Please install Python to use the Search Engine."));
         return;
     }

src/webui/CMakeLists.txt

@@ -7,6 +7,7 @@ api/isessionmanager.h
 api/authcontroller.h
 api/logcontroller.h
 api/rsscontroller.h
+api/searchcontroller.h
 api/synccontroller.h
 api/torrentscontroller.h
 api/transfercontroller.h
@@ -22,6 +23,7 @@ api/appcontroller.cpp
 api/authcontroller.cpp
 api/logcontroller.cpp
 api/rsscontroller.cpp
+api/searchcontroller.cpp
 api/synccontroller.cpp
 api/torrentscontroller.cpp
 api/transfercontroller.cpp

src/webui/api/isessionmanager.h

@@ -37,6 +37,11 @@ struct ISession
     virtual QString id() const = 0;
     virtual QVariant getData(const QString &id) const = 0;
     virtual void setData(const QString &id, const QVariant &data) = 0;
+
+    template <class T>
+    T getData(const QString &id) const {
+        return this->getData(id).value<T>();
+    }
 };
 
 struct ISessionManager

src/webui/api/searchcontroller.cpp

@@ -0,0 +1,367 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2018  Thomas Piccirello <thomas.piccirello@gmail.com>
+ *
+ * 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.
+ *
+ * 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ */
+
+#include "searchcontroller.h"
+
+#include <QSharedPointer>
+
+#include "base/global.h"
+#include "base/logger.h"
+#include "base/search/searchhandler.h"
+#include "base/utils/foreignapps.h"
+#include "base/utils/random.h"
+#include "base/utils/string.h"
+#include "apierror.h"
+
+class SearchPluginManager;
+
+using SearchHandlerPtr = QSharedPointer<SearchHandler>;
+using SearchHandlerDict = QMap<int, SearchHandlerPtr>;
+
+namespace
+{
+    const QLatin1String ACTIVE_SEARCHES("activeSearches");
+    const QLatin1String SEARCH_HANDLERS("searchHandlers");
+
+    void removeActiveSearch(ISession *session, const int id)
+    {
+        auto activeSearches = session->getData<QSet<int>>(ACTIVE_SEARCHES);
+        if (activeSearches.remove(id) > 0)
+            session->setData(ACTIVE_SEARCHES, QVariant::fromValue(activeSearches));
+    }
+}
+
+void SearchController::startAction()
+{
+    checkParams({"pattern", "category", "plugins"});
+
+    if (!Utils::ForeignApps::pythonInfo().isValid())
+        throw APIError(APIErrorType::Conflict, "Python must be installed to use the Search Engine.");
+
+    const QString pattern = params()["pattern"].trimmed();
+    const QString category = params()["category"].trimmed();
+    const QStringList plugins = params()["plugins"].split('|');
+
+    QStringList pluginsToUse;
+    if (plugins.size() == 1) {
+        const QString pluginsLower = plugins[0].toLower();
+        if (pluginsLower == "all")
+            pluginsToUse = SearchPluginManager::instance()->allPlugins();
+        else if ((pluginsLower == "enabled") || (pluginsLower == "multi"))
+            pluginsToUse = SearchPluginManager::instance()->enabledPlugins();
+        else
+            pluginsToUse << plugins;
+    }
+    else {
+        pluginsToUse << plugins;
+    }
+
+    ISession *const session = sessionManager()->session();
+    auto activeSearches = session->getData<QSet<int>>(ACTIVE_SEARCHES);
+    if (activeSearches.size() >= MAX_CONCURRENT_SEARCHES)
+        throw APIError(APIErrorType::Conflict, QString("Unable to create more than %1 concurrent searches.").arg(MAX_CONCURRENT_SEARCHES));
+
+    const auto id = generateSearchId();
+    const SearchHandlerPtr searchHandler {SearchPluginManager::instance()->startSearch(pattern, category, pluginsToUse)};
+    QObject::connect(searchHandler.data(), &SearchHandler::searchFinished, this, [session, id, this]() { searchFinished(session, id); });
+    QObject::connect(searchHandler.data(), &SearchHandler::searchFailed, this, [session, id, this]() { searchFailed(session, id); });
+
+    auto searchHandlers = session->getData<SearchHandlerDict>(SEARCH_HANDLERS);
+    searchHandlers.insert(id, searchHandler);
+    session->setData(SEARCH_HANDLERS, QVariant::fromValue(searchHandlers));
+
+    activeSearches.insert(id);
+    session->setData(ACTIVE_SEARCHES, QVariant::fromValue(activeSearches));
+
+    const QJsonObject result = {{"id", id}};
+    setResult(result);
+}
+
+void SearchController::stopAction()
+{
+    checkParams({"id"});
+
+    const int id = params()["id"].toInt();
+    ISession *const session = sessionManager()->session();
+
+    auto searchHandlers = session->getData<SearchHandlerDict>(SEARCH_HANDLERS);
+    if (!searchHandlers.contains(id))
+        throw APIError(APIErrorType::NotFound);
+
+    const SearchHandlerPtr searchHandler = searchHandlers[id];
+
+    if (searchHandler->isActive()) {
+        searchHandler->cancelSearch();
+        removeActiveSearch(session, id);
+    }
+}
+
+void SearchController::statusAction()
+{
+    const int id = params()["id"].toInt();
+
+    const auto searchHandlers = sessionManager()->session()->getData<SearchHandlerDict>(SEARCH_HANDLERS);
+    if ((id != 0) && !searchHandlers.contains(id))
+        throw APIError(APIErrorType::NotFound);
+
+    QJsonArray statusArray;
+    const QList<int> searchIds {(id == 0) ? searchHandlers.keys() : QList<int> {id}};
+
+    for (const int searchId : searchIds) {
+        const SearchHandlerPtr searchHandler = searchHandlers[searchId];
+        statusArray << QJsonObject {
+            {"id", searchId},
+            {"status", searchHandler->isActive() ? "Running" : "Stopped"},
+            {"total", searchHandler->results().size()}
+        };
+    }
+
+    setResult(statusArray);
+}
+
+void SearchController::resultsAction()
+{
+    checkParams({"id"});
+
+    const int id = params()["id"].toInt();
+    int limit = params()["limit"].toInt();
+    int offset = params()["offset"].toInt();
+
+    const auto searchHandlers = sessionManager()->session()->getData<SearchHandlerDict>(SEARCH_HANDLERS);
+    if (!searchHandlers.contains(id))
+        throw APIError(APIErrorType::NotFound);
+
+    const SearchHandlerPtr searchHandler = searchHandlers[id];
+    const QList<SearchResult> searchResults = searchHandler->results();
+    const int size = searchResults.size();
+
+    if (offset > size)
+        throw APIError(APIErrorType::Conflict, tr("Offset is out of range"));
+
+    // normalize values
+    if (offset < 0)
+        offset = size + offset;
+    if (offset < 0)  // check again
+        throw APIError(APIErrorType::Conflict, tr("Offset is out of range"));
+    if (limit <= 0)
+        limit = -1;
+
+    if ((limit > 0) || (offset > 0))
+        setResult(getResults(searchResults.mid(offset, limit), searchHandler->isActive(), size));
+    else
+        setResult(getResults(searchResults, searchHandler->isActive(), size));
+}
+
+void SearchController::deleteAction()
+{
+    checkParams({"id"});
+
+    const int id = params()["id"].toInt();
+    ISession *const session = sessionManager()->session();
+
+    auto searchHandlers = session->getData<SearchHandlerDict>(SEARCH_HANDLERS);
+    if (!searchHandlers.contains(id))
+        throw APIError(APIErrorType::NotFound);
+
+    const SearchHandlerPtr searchHandler = searchHandlers[id];
+    searchHandler->cancelSearch();
+    searchHandlers.remove(id);
+    session->setData(SEARCH_HANDLERS, QVariant::fromValue(searchHandlers));
+
+    removeActiveSearch(session, id);
+}
+
+void SearchController::categoriesAction()
+{
+    QStringList categories;
+    const QString name = params()["pluginName"].trimmed();
+
+    categories << SearchPluginManager::categoryFullName("all");
+    for (const QString &category : copyAsConst(SearchPluginManager::instance()->getPluginCategories(name)))
+        categories << SearchPluginManager::categoryFullName(category);
+
+    const QJsonArray result = QJsonArray::fromStringList(categories);
+    setResult(result);
+}
+
+void SearchController::pluginsAction()
+{
+    const QStringList allPlugins = SearchPluginManager::instance()->allPlugins();
+    setResult(getPluginsInfo(allPlugins));
+}
+
+void SearchController::installPluginAction()
+{
+    checkParams({"sources"});
+
+    const QStringList sources = params()["sources"].split('|');
+    for (const QString &source : sources)
+        SearchPluginManager::instance()->installPlugin(source);
+}
+
+void SearchController::uninstallPluginAction()
+{
+    checkParams({"names"});
+
+    const QStringList names = params()["names"].split('|');
+    for (const QString &name : names)
+        SearchPluginManager::instance()->uninstallPlugin(name.trimmed());
+}
+
+void SearchController::enablePluginAction()
+{
+    checkParams({"names", "enable"});
+
+    const QStringList names = params()["names"].split('|');
+    const bool enable = Utils::String::parseBool(params()["enable"].trimmed(), false);
+
+    for (const QString &name : names)
+        SearchPluginManager::instance()->enablePlugin(name.trimmed(), enable);
+}
+
+void SearchController::updatePluginsAction()
+{
+    SearchPluginManager *const pluginManager = SearchPluginManager::instance();
+
+    connect(pluginManager, &SearchPluginManager::checkForUpdatesFinished, this, &SearchController::checkForUpdatesFinished);
+    connect(pluginManager, &SearchPluginManager::checkForUpdatesFailed, this, &SearchController::checkForUpdatesFailed);
+    pluginManager->checkForUpdates();
+}
+
+void SearchController::checkForUpdatesFinished(const QHash<QString, PluginVersion> &updateInfo)
+{
+    if (updateInfo.isEmpty()) {
+        LogMsg(tr("All plugins are already up to date."), Log::INFO);
+        return;
+    }
+
+    LogMsg(tr("Updating %1 plugins").arg(updateInfo.size()), Log::INFO);
+
+    SearchPluginManager *const pluginManager = SearchPluginManager::instance();
+    for (const QString &pluginName : updateInfo.keys()) {
+        LogMsg(tr("Updating plugin %1").arg(pluginName), Log::INFO);
+        pluginManager->updatePlugin(pluginName);
+    }
+}
+
+void SearchController::checkForUpdatesFailed(const QString &reason)
+{
+    LogMsg(tr("Failed to check for plugin updates: %1").arg(reason), Log::INFO);
+}
+
+void SearchController::searchFinished(ISession *session, const int id)
+{
+    removeActiveSearch(session, id);
+}
+
+void SearchController::searchFailed(ISession *session, const int id)
+{
+    removeActiveSearch(session, id);
+}
+
+int SearchController::generateSearchId() const
+{
+    const auto searchHandlers = sessionManager()->session()->getData<SearchHandlerDict>(SEARCH_HANDLERS);
+
+    while (true)
+    {
+        const auto id = Utils::Random::rand(1, INT_MAX);
+        if (!searchHandlers.contains(id))
+            return id;
+    }
+}
+
+/**
+ * Returns the search results in JSON format.
+ *
+ * The return value is an object with a status and an array of dictionaries.
+ * The dictionary keys are:
+ *   - "fileName"
+ *   - "fileUrl"
+ *   - "fileSize"
+ *   - "nbSeeders"
+ *   - "nbLeechers"
+ *   - "siteUrl"
+ *   - "descrLink"
+ */
+QJsonObject SearchController::getResults(const QList<SearchResult> &searchResults, const bool isSearchActive, const int totalResults) const
+{
+    QJsonArray searchResultsArray;
+    for (const SearchResult &searchResult : searchResults) {
+        searchResultsArray << QJsonObject {
+            {"fileName", searchResult.fileName},
+            {"fileUrl", searchResult.fileUrl},
+            {"fileSize", searchResult.fileSize},
+            {"nbSeeders", searchResult.nbSeeders},
+            {"nbLeechers", searchResult.nbLeechers},
+            {"siteUrl", searchResult.siteUrl},
+            {"descrLink", searchResult.descrLink}
+        };
+    }
+
+    const QJsonObject result = {
+        {"status", isSearchActive ? "Running" : "Stopped"},
+        {"results", searchResultsArray},
+        {"total", totalResults}
+    };
+
+    return result;
+}
+
+/**
+ * Returns the search plugins in JSON format.
+ *
+ * The return value is an array of dictionaries.
+ * The dictionary keys are:
+ *   - "name"
+ *   - "version"
+ *   - "fullName"
+ *   - "url"
+ *   - "supportedCategories"
+ *   - "iconPath"
+ *   - "enabled"
+ */
+QJsonArray SearchController::getPluginsInfo(const QStringList &plugins) const
+{
+    QJsonArray pluginsArray;
+
+    for (const QString &plugin : plugins) {
+        const PluginInfo *const pluginInfo = SearchPluginManager::instance()->pluginInfo(plugin);
+
+        pluginsArray << QJsonObject {
+            {"name", pluginInfo->name},
+            {"version", QString(pluginInfo->version)},
+            {"fullName", pluginInfo->fullName},
+            {"url", pluginInfo->url},
+            {"supportedCategories", QJsonArray::fromStringList(pluginInfo->supportedCategories)},
+            {"enabled", pluginInfo->enabled}
+        };
+    }
+
+    return pluginsArray;
+}

src/webui/api/searchcontroller.h

@@ -0,0 +1,74 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2018  Thomas Piccirello <thomas.piccirello@gmail.com>
+ *
+ * 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.
+ *
+ * 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ */
+
+#pragma once
+
+#include <QHash>
+#include <QJsonArray>
+#include <QJsonObject>
+#include <QList>
+#include <QString>
+
+#include "base/search/searchpluginmanager.h"
+#include "apicontroller.h"
+#include "isessionmanager.h"
+
+struct SearchResult;
+
+class SearchController : public APIController
+{
+    Q_OBJECT
+    Q_DISABLE_COPY(SearchController)
+
+public:
+    using APIController::APIController;
+
+private slots:
+    void startAction();
+    void stopAction();
+    void statusAction();
+    void resultsAction();
+    void deleteAction();
+    void categoriesAction();
+    void pluginsAction();
+    void installPluginAction();
+    void uninstallPluginAction();
+    void enablePluginAction();
+    void updatePluginsAction();
+
+private:
+    const int MAX_CONCURRENT_SEARCHES = 5;
+
+    void checkForUpdatesFinished(const QHash<QString, PluginVersion> &updateInfo);
+    void checkForUpdatesFailed(const QString &reason);
+    void searchFinished(ISession *session, const int id);
+    void searchFailed(ISession *session, const int id);
+    int generateSearchId() const;
+    QJsonObject getResults(const QList<SearchResult> &searchResults, bool isSearchActive, int totalResults) const;
+    QJsonArray getPluginsInfo(const QStringList &plugins) const;
+};

src/webui/webapplication.cpp

@@ -61,6 +61,7 @@
 #include "api/authcontroller.h"
 #include "api/logcontroller.h"
 #include "api/rsscontroller.h"
+#include "api/searchcontroller.h"
 #include "api/synccontroller.h"
 #include "api/torrentscontroller.h"
 #include "api/transfercontroller.h"
@@ -164,6 +165,7 @@ WebApplication::WebApplication(QObject *parent)
     registerAPIController(QLatin1String("auth"), new AuthController(this, this));
     registerAPIController(QLatin1String("log"), new LogController(this, this));
     registerAPIController(QLatin1String("rss"), new RSSController(this, this));
+    registerAPIController(QLatin1String("search"), new SearchController(this, this));
     registerAPIController(QLatin1String("sync"), new SyncController(this, this));
     registerAPIController(QLatin1String("torrents"), new TorrentsController(this, this));
     registerAPIController(QLatin1String("transfer"), new TransferController(this, this));

src/webui/webui.pri

@@ -6,6 +6,7 @@ HEADERS += \
     $$PWD/api/isessionmanager.h \
     $$PWD/api/logcontroller.h \
     $$PWD/api/rsscontroller.h \
+    $$PWD/api/searchcontroller.h \
     $$PWD/api/synccontroller.h \
     $$PWD/api/torrentscontroller.h \
     $$PWD/api/transfercontroller.h \
@@ -21,6 +22,7 @@ SOURCES += \
     $$PWD/api/authcontroller.cpp \
     $$PWD/api/logcontroller.cpp \
     $$PWD/api/rsscontroller.cpp \
+    $$PWD/api/searchcontroller.cpp \
     $$PWD/api/synccontroller.cpp \
     $$PWD/api/torrentscontroller.cpp \
     $$PWD/api/transfercontroller.cpp \