Collection: Make sure RunQuery does not access collection items

- Rename `QueryOptions` to `CollectionFilterOptions`.
- Create new class `CollectionQueryOptions` for passing options from model to `CollectionQuery`.
- Rename `Directory` to `CollectionDirectory`.

Fixes #1095

src/collection/collectionqueryoptions.h

@@ -0,0 +1,57 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2023, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef COLLECTIONQUERYOPTIONS_H
+#define COLLECTIONQUERYOPTIONS_H
+
+#include <QList>
+#include <QVariant>
+#include <QString>
+
+class CollectionQueryOptions {
+ public:
+
+  explicit CollectionQueryOptions();
+
+  struct Where {
+    explicit Where(const QString _column = QString(), const QVariant _value = QString(), const QString _op = QString()) : column(_column), value(_value), op(_op) {}
+    QString column;
+    QVariant value;
+    QString op;
+  };
+
+  QString column_spec() const { return column_spec_; }
+  bool compilation_requirement() const { return compilation_requirement_; }
+  bool query_have_compilations() const { return query_have_compilations_; }
+
+  void set_column_spec(const QString &column_spec) { column_spec_ = column_spec; }
+  void set_compilation_requirement(const bool compilation_requirement) { compilation_requirement_ = compilation_requirement; }
+  void set_query_have_compilations(const bool query_have_compilations) { query_have_compilations_ = query_have_compilations; }
+
+  QList<Where> where_clauses() const { return where_clauses_; }
+  void AddWhere(const QString &column, const QVariant &value, const QString &op = "=");
+
+ private:
+  QString column_spec_;
+  bool compilation_requirement_;
+  bool query_have_compilations_;
+  QList<Where> where_clauses_;
+};
+
+#endif  // COLLECTIONQUERYOPTIONS_H