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 /*
     SPDX-FileCopyrightText: 2015, 2016 Ivan Cukic <ivan.cukic(at)kde.org>
 
     SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
 */
 
 #ifndef KACTIVITIES_STATS_RESULTWATCHER
 #define KACTIVITIES_STATS_RESULTWATCHER
 
 #include <QObject>
 
 #include "query.h"
 #include "resultset.h"
 
 namespace KActivities
 {
 namespace Stats
 {
 class ResultWatcherPrivate;
 
 /**
  * @class KActivities::Stats::ResultWatcher resultwatcher.h <KActivities/Stats/ResultWatcher>
  *
  * A very thin class that sends signals when new resources matching
  * a predefined query are available.
  */
 class KACTIVITIESSTATS_EXPORT ResultWatcher : public QObject
 {
     Q_OBJECT
 
 public:
     explicit ResultWatcher(Query query, QObject *parent = nullptr);
     ~ResultWatcher() override;
 
 Q_SIGNALS:
     /**
      * Emitted when a result has been added or updated. This either means
      * a new resource has appeared in the result set, or that
      * a previously existing one has some of the attributes changed.
      * @param result new data for the resource defined by result.resource
      */
     void resultScoreUpdated(const QString &resource, double score, uint lastUpdate, uint firstUpdate);
 
     /**
      * Emitted when a result has been added or updated. This either means
      * a new resource has appeared in the result set, or that
      * a previously existing one has some of the attributes changed.
      * @param result new data for the resource defined by result.resource
      */
     void resultRemoved(const QString &resource);
 
     /**
      * Emitted when a result has been linked to the activity
      */
     void resultLinked(const QString &resource);
 
     /**
      * Emitted when a result has been linked to the activity
      */
     void resultUnlinked(const QString &resource);
 
     /**
      * Emitted when the title of a resource has been changed.
      * @param resource URL of the resource that has a new title
      * @param title new title of the resource
      * @note This signal will be emitted even for the resources that
      * do not match the specified query. This is because the class is
      * lightweight, and it does not keep track of which resources match
      * the query to be able to filter this signal.
      */
     void resourceTitleChanged(const QString &resource, const QString &title);
 
     /**
      * Emitted when the mimetype of a resource has been changed.
      * @param resource URL of the resource that has a new mimetype
      * @param mimetype new mimetype of the resource
      * @note This signal will be emitted even for the resources that
      * do not match the specified query. This is because the class is
      * lightweight, and it does not keep track of which resources match
      * the query to be able to filter this signal.
      */
     void resourceMimetypeChanged(const QString &resource, const QString &mimetype);
 
     /**
      * Emitted when the client should forget about all the results it
      * knew about and reload them. This can happen when the user clears
      * the history, or when there are more significant changes to the data.
      */
     void resultsInvalidated();
 
 public:
     void linkToActivity(const QUrl &resource,
                         const Terms::Activity &activity = Terms::Activity(QStringList()),
                         const Terms::Agent &agent = Terms::Agent(QStringList()));
 
     void unlinkFromActivity(const QUrl &resource,
                             const Terms::Activity &activity = Terms::Activity(QStringList()),
                             const Terms::Agent &agent = Terms::Agent(QStringList()));
 
 private:
     ResultWatcherPrivate *const d;
 };
 
 } // namespace Stats
 } // namespace KActivities
 
 #endif // KACTIVITIES_STATS_RESULTWATCHER