123 lines
3.7 KiB
C++
123 lines
3.7 KiB
C++
#ifndef SQLITEBACKEND_H
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#define SQLITEBACKEND_H
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#include <QObject>
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#include <QPointF>
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#include <QHash>
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#include <QtSql>
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#include <QFile>
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enum TagChange {
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CREATED,
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CHANGED,
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DELETED
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};
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class Tag
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{
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public:
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Tag() : valid(false) {}
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Tag(long long int id, QString name, qreal anchor_x, qreal anchor_y, QByteArray metadata);
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Tag(long long int id, const Tag &other);
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Tag(QString name, const QPointF &anchor, const QVariantMap metadata=QVariantMap());
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bool isValid() { return valid; }
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long long int id;
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QString name;
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QPointF anchor;
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QVariantMap metadata;
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private:
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bool valid;
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};
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class SQLiteSaveFile : public QObject
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{
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Q_OBJECT
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public:
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explicit SQLiteSaveFile(QObject *parent = nullptr);
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QList<Tag> getAllTags();
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const QByteArray &getImage() const { return m_image; };
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bool updateTag(Tag tag);
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bool deleteTag(Tag tag);
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bool createTag(Tag tag);
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bool createTagAt(const QPointF &anchor);
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QString getNextAutoTagName();
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bool tagNameIsFree(const QString &name);
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bool isMemory() { return m_memory; } /* backend db points to temporary memory db */
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bool isDirty() { return m_dirty; } /* backend db was changed since opening */
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bool isOpen() { return m_open; } /* backend db is open */
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bool setMeta(const QString &key, const QVariant &value, bool setDirty=false);
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bool setMeta(std::initializer_list<QPair<QString, QVariant>> metas, bool setDirty=false);
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const QVariant getMeta(const QString &key) const;
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const QString &errorString() const { return m_lastErrorString; }
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enum Error {
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NoError = 0,
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FileNotFoundError,
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SQLiteError,
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ImageOpenError,
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ImageReadError,
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MaxError
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};
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inline const static QString errorNames[MaxError] = {
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[NoError] = "No Error",
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[FileNotFoundError] = "File not found",
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[SQLiteError] = "Database Error",
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[ImageOpenError] = "Error Opening Image",
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[ImageReadError] = "Error Reading Image"
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};
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Error error();
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void resetError() const { m_lastError = NoError; m_lastErrorString = QString(); }
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public slots:
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/** Save this project file under a new name. This changes the backend database this project file object points to, and copies all data.
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* Callers can continue to use the same project file object afterwards.
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*/
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bool saveAs(const QString &filename);
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bool open(const QString &filename);
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bool reloadImageFromDisk();
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bool loadImageFromDisk(const QString &m_filename);
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bool clearNew();
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signals:
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void tagChange(TagChange change, const Tag &tag);
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void fileReload();
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void fileIOError(Error e, QString errorName, QString description) const;
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void imageLoaded(const QByteArray &image);
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private:
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bool connect();
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bool initDb(bool setCreationDate=true, const QString &schema_name="main");
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bool runSql(QString query, std::initializer_list<QVariant> bindings={});
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bool setMetaLocked(const QString &key, const QVariant &value);
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bool setMetaLocked(std::initializer_list<QPair<QString, QVariant>> metas);
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const QVariant getMetaLocked(const QString &key) const;
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void setError(Error e, QString desc) const { m_lastError = e; m_lastErrorString = desc; fileIOError(e, errorNames[e], desc); }
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bool setDatabaseError(const QSqlQuery &q) const;
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bool setDatabaseError(const QSqlDatabase &m_db) const;
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mutable Error m_lastError;
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mutable QString m_lastErrorString;
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QSqlDatabase m_db;
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mutable QMutex m_dbMut;
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QString m_filename;
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QByteArray m_image;
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bool m_open;
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bool m_dirty;
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bool m_memory;
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};
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#endif // SQLITEBACKEND_H
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