Move all timeline relevant models and classes to the module

src/timeline/pollhandler.h

@@ -0,0 +1,141 @@
+// SPDX-FileCopyrightText: 2022 Tobias Fella <tobias.fella@kde.org>
+// SPDX-License-Identifier: LGPL-2.0-or-later
+
+#pragma once
+
+#include <QJsonArray>
+#include <QJsonObject>
+#include <QObject>
+#include <QPair>
+#include <QQmlEngine>
+
+#include <Quotient/events/roomevent.h>
+
+#include "events/pollevent.h"
+#include "models/pollanswermodel.h"
+
+namespace Quotient
+{
+class PollResponseEvent;
+}
+
+class NeoChatRoom;
+
+/**
+ * @class PollHandler
+ *
+ * A class to help manage a poll in a room.
+ *
+ * A poll is made up of a start event that poses the question and possible answers,
+ * and is followed by a series of response events as users in the room select
+ * their choice. This purpose of the poll handler is to keep track of all this as
+ * the poll is displayed as a single event in the timeline which merges all this
+ * information.
+ */
+class PollHandler : public QObject
+{
+    Q_OBJECT
+    QML_ELEMENT
+    QML_UNCREATABLE("Use NeoChatRoom::poll")
+
+    /**
+     * @brief The kind of the poll.
+     */
+    Q_PROPERTY(PollKind::Kind kind READ kind CONSTANT)
+
+    /**
+     * @brief The question for the poll.
+     */
+    Q_PROPERTY(QString question READ question NOTIFY questionChanged)
+
+    /**
+     * @brief Whether the poll has ended.
+     */
+    Q_PROPERTY(bool hasEnded READ hasEnded NOTIFY hasEndedChanged)
+
+    /**
+     * @brief The model to visualize the answers to this poll.
+     */
+    Q_PROPERTY(PollAnswerModel *answerModel READ answerModel CONSTANT)
+
+    /**
+     * @brief The total number of vote responses to the poll.
+     */
+    Q_PROPERTY(int totalCount READ totalCount NOTIFY totalCountChanged)
+
+public:
+    PollHandler() = default;
+    PollHandler(NeoChatRoom *room, const QString &pollStartId);
+
+    NeoChatRoom *room() const;
+
+    PollKind::Kind kind() const;
+    QString question() const;
+    bool hasEnded() const;
+    PollAnswerModel *answerModel();
+
+    /**
+     * @brief The total number of answer options.
+     */
+    int numAnswers() const;
+
+    /**
+     * @brief The answer at the given row.
+     */
+    Quotient::EventContent::Answer answerAtRow(int row) const;
+
+    /**
+     * @brief The number of responders who gave the answer ID.
+     */
+    int answerCountAtId(const QString &id) const;
+
+    /**
+     * @brief Check whether the given member has selected the given ID in their response.
+     */
+    bool checkMemberSelectedId(const QString &memberId, const QString &id) const;
+
+    int totalCount() const;
+
+    /**
+     * @brief The current answer IDs with the most votes.
+     */
+    QStringList winningAnswerIds() const;
+
+    /**
+     * @brief Send an answer to the poll.
+     */
+    Q_INVOKABLE void sendPollAnswer(const QString &eventId, const QString &answerId);
+
+    /**
+     * @brief Send the PollEndEvent.
+     */
+    Q_INVOKABLE void endPoll() const;
+
+Q_SIGNALS:
+    void questionChanged();
+    void hasEndedChanged();
+    void answersChanged();
+    void totalCountChanged();
+
+    /**
+     * @brief Emitted when the selected answers to the poll change.
+     */
+    void selectionsChanged();
+
+private:
+    QString m_pollStartId;
+
+    void updatePoll(Quotient::RoomEventsRange events);
+
+    void checkLoadRelations();
+    void handleEvent(Quotient::RoomEvent *event);
+    void handleResponse(const Quotient::PollResponseEvent *event);
+    QHash<QString, QDateTime> m_selectionTimestamps;
+    QHash<QString, QStringList> m_selections;
+
+    bool m_hasEnded = false;
+    QDateTime m_endedTimestamp;
+    QString endText() const;
+
+    QPointer<PollAnswerModel> m_answerModel;
+};