filter: implement full-text filtering in mobile version of DiveFilter

In analogy to the desktop version, use the fulltext index in
DiveFilter. This code is not yet executed.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

core/divefilter.cpp

@@ -15,28 +15,73 @@ static void updateDiveStatus(dive *d, bool newStatus, ShownChange &change)
 
 #ifdef SUBSURFACE_MOBILE
 
+DiveFilter *DiveFilter::instance()
+{
+	static DiveFilter self;
+	return &self;
+}
+
 DiveFilter::DiveFilter()
 {
 }
 
-ShownChange DiveFilter::update(const QVector<dive *> &) const
+ShownChange DiveFilter::update(const QVector<dive *> &dives) const
 {
+	dive *old_current = current_dive;
+
 	ShownChange res;
+	switch (filterData.mode) {
+	default:
+	case FilterData::Mode::NONE:
+		for (dive *d: dives)
+			updateDiveStatus(d, true, res);
+		break;
+	case FilterData::Mode::FULLTEXT:
+		for (dive *d: dives)
+			updateDiveStatus(d, fulltext_dive_matches(d, filterData.fullText, StringFilterMode::STARTSWITH), res);
+		break;
+	}
+
+	res.currentChanged = old_current != current_dive;
 	return res;
 }
 
 ShownChange DiveFilter::updateAll() const
 {
+	dive *old_current = current_dive;
+
 	ShownChange res;
+	int i;
+	dive *d;
+	switch (filterData.mode) {
+	default:
+	case FilterData::Mode::NONE:
+		for_each_dive(i, d)
+			updateDiveStatus(d, true, res);
+		break;
+	case FilterData::Mode::FULLTEXT: {
+		FullTextResult ft = fulltext_find_dives(filterData.fullText, StringFilterMode::STARTSWITH);
+		for_each_dive(i, d)
+			updateDiveStatus(d, ft.dive_matches(d), res);
+		break;
+	}
+	}
+
+	res.currentChanged = old_current != current_dive;
 	return res;
 }
 
+void DiveFilter::setFilter(const FilterData &data)
+{
+	filterData = data;
+	//emit diveListNotifier.filterReset(); // Not yet using common models
+}
+
 #else // SUBSURFACE_MOBILE
 
 #include "desktop-widgets/mapwidget.h"
 #include "desktop-widgets/mainwindow.h"
 #include "desktop-widgets/divelistview.h"
-#include "core/fulltext.h"
 #include "core/qthelper.h"
 #include "core/trip.h"
 #include "core/divesite.h"

core/divefilter.h

@@ -4,6 +4,8 @@
 #define DIVE_FILTER_H
 
 #include <QVector>
+#include "fulltext.h"
+
 struct dive;
 
 // Structure describing changes of shown status upon applying the filter
@@ -18,19 +20,35 @@ struct ShownChange {
 // This should be unified in the future.
 #ifdef SUBSURFACE_MOBILE
 
+struct FilterData {
+	// On mobile, we support searching fulltext (all fields), people (buddies and divemasters) and tags
+	enum class Mode {
+		NONE = 0,
+		FULLTEXT = 1,
+		PEOPLE = 2,
+		TAGS = 3
+	};
+
+	Mode mode = Mode::NONE;
+	FullTextQuery fullText; // For fulltext
+	QString text; // For people and tags
+};
+
 class DiveFilter {
 public:
 	static DiveFilter *instance();
 
 	ShownChange update(const QVector<dive *> &dives) const; // Update filter status of given dives and return dives whose status changed
 	ShownChange updateAll() const; // Update filter status of all dives and return dives whose status changed
+	void setFilter(const FilterData &data);
 private:
 	DiveFilter();
+
+	FilterData filterData;
 };
 
 #else
 
-#include "fulltext.h"
 #include <QDateTime>
 #include <QStringList>