Introduce ILanguage interface

autotests/integrationtests/iresourcerepository_integration/test_iresourcerepository.cpp

@@ -76,7 +76,7 @@ void TestIResourceRepository::performInterfaceTests(IResourceRepository *interfa
 
     // test access of courses grouped by language
     auto languages = interface->languages();
-    std::shared_ptr<Language> german;
+    std::shared_ptr<ILanguage> german;
     for (auto language : interface->languages()) {
         if (language->id() == "de") {
             german = language;

autotests/mocks/coursestub.h

@@ -30,14 +30,14 @@
 class CourseStub : public ICourse
 {
 public:
-    CourseStub(std::shared_ptr<Language> language, QVector<std::shared_ptr<Unit>> units)
+    CourseStub(std::shared_ptr<ILanguage> language, QVector<std::shared_ptr<Unit>> units)
         : m_language(language)
         , m_units(units)
     {
     }
     ~CourseStub() override;
 
-    static std::shared_ptr<ICourse> create(std::shared_ptr<Language> language, QVector<std::shared_ptr<Unit>> units)
+    static std::shared_ptr<ICourse> create(std::shared_ptr<ILanguage> language, QVector<std::shared_ptr<Unit>> units)
     {
         auto course = std::make_shared<CourseStub>(language, units);
         course->setSelf(course);
@@ -74,7 +74,7 @@ public:
     {
         return "description of the course";
     }
-    std::shared_ptr<Language> language() const override
+    std::shared_ptr<ILanguage> language() const override
     {
         return m_language;
     }
@@ -90,7 +90,7 @@ public:
 private:
     QString m_title{ "title" };
     std::weak_ptr<ICourse> m_self;
-    std::shared_ptr<Language> m_language;
+    std::shared_ptr<ILanguage> m_language;
     QVector<std::shared_ptr<Unit>> m_units;
 };
 

autotests/mocks/editablerepositorystub.h

@@ -26,7 +26,7 @@
 #include <QObject>
 #include <QVector>
 
-class Language;
+class ILanguage;
 class SkeletonResource;
 
 /**
@@ -37,7 +37,7 @@ class EditableRepositoryStub : public IEditableRepository
     Q_OBJECT
 public:
     EditableRepositoryStub(
-            std::vector<std::shared_ptr<Language>> languages,
+            std::vector<std::shared_ptr<ILanguage>> languages,
             std::vector<std::shared_ptr<IEditableCourse>> skeletons,
             std::vector<std::shared_ptr<IEditableCourse>> courses)
     {
@@ -77,7 +77,7 @@ public:
         Q_UNUSED(languageId);
         return QVector<std::shared_ptr<ICourse>>();
     }
-    std::shared_ptr<IEditableCourse> editableCourse(std::shared_ptr<Language> language, int index) const override
+    std::shared_ptr<IEditableCourse> editableCourse(std::shared_ptr<ILanguage> language, int index) const override
     {
         Q_UNUSED(language);
         Q_UNUSED(index);
@@ -87,7 +87,7 @@ public:
     {
         // do nothing
     }
-    QVector<std::shared_ptr<Language>> languages() const override
+    QVector<std::shared_ptr<ILanguage>> languages() const override
     {
         return m_languages;
     }
@@ -98,7 +98,7 @@ public:
     }
 
 private:
-    QVector<std::shared_ptr<Language>> m_languages;
+    QVector<std::shared_ptr<ILanguage>> m_languages;
     QVector<std::shared_ptr<IEditableCourse>> m_skeletons;
     QVector<std::shared_ptr<IEditableCourse>> m_courses;
 };

autotests/mocks/resourcerepositorystub.h

@@ -36,21 +36,21 @@ class ResourceRepositoryStub : public IResourceRepository
 {
     Q_OBJECT
 public:
-    ResourceRepositoryStub(std::vector<std::unique_ptr<Language>> languages)
+    ResourceRepositoryStub(std::vector<std::unique_ptr<ILanguage>> languages)
     {
         for (auto &language : languages) {
             m_languages.append(std::move(language));
         }
     }
 
-    ResourceRepositoryStub(std::vector<std::shared_ptr<Language>> languages)
+    ResourceRepositoryStub(std::vector<std::shared_ptr<ILanguage>> languages)
     {
         for (auto &language : languages) {
             m_languages.append(language);
         }
     }
 
-    ResourceRepositoryStub(std::vector<std::shared_ptr<Language>> languages, std::vector<std::shared_ptr<ICourse>> courses)
+    ResourceRepositoryStub(std::vector<std::shared_ptr<ILanguage>> languages, std::vector<std::shared_ptr<ICourse>> courses)
     {
         for (auto &language : languages) {
             m_languages.append(language);
@@ -83,7 +83,7 @@ public:
         ; // do nothing, stub shall only provide languages
     }
 
-    QVector<std::shared_ptr<Language>> languages() const override
+    QVector<std::shared_ptr<ILanguage>> languages() const override
     {
         return m_languages;
     }
@@ -108,7 +108,7 @@ public:
 
 private:
     QString m_storageLocation;
-    QVector<std::shared_ptr<Language>> m_languages;
+    QVector<std::shared_ptr<ILanguage>> m_languages;
     QVector<std::shared_ptr<ICourse>> m_courses;
 };
 

autotests/unittests/coursemodel/test_coursemodel.cpp

@@ -41,9 +41,9 @@ void TestCourseModel::cleanup()
 void TestCourseModel::testInit()
 {
     // boilerplate
-    std::shared_ptr<Language> language(new Language);
-    language->setId("de");
-    std::vector<std::shared_ptr<Language>> languages;
+    std::shared_ptr<ILanguage> language(new Language);
+    std::static_pointer_cast<Language>(language)->setId("de");
+    std::vector<std::shared_ptr<ILanguage>> languages;
     languages.push_back(language);
     auto course = CourseStub::create(language, QVector<std::shared_ptr<Unit>>({}));
     ResourceRepositoryStub repository(languages, {course});
@@ -58,9 +58,9 @@ void TestCourseModel::testInit()
 void TestCourseModel::testAddRemoveOperations()
 {
     // boilerplate
-    std::shared_ptr<Language> language(new Language);
-    language->setId("de");
-    std::vector<std::shared_ptr<Language>> languages;
+    std::shared_ptr<ILanguage> language(new Language);
+    std::static_pointer_cast<Language>(language)->setId("de");
+    std::vector<std::shared_ptr<ILanguage>> languages;
     languages.push_back(language);
     ResourceRepositoryStub repository(languages, {});
 
@@ -98,9 +98,9 @@ void TestCourseModel::testAddRemoveOperations()
 void TestCourseModel::testDataChangedSignals()
 {
     // boilerplate
-    std::shared_ptr<Language> language(new Language);
-    language->setId("de");
-    std::vector<std::shared_ptr<Language>> languages;
+    std::shared_ptr<ILanguage> language(new Language);
+    std::static_pointer_cast<Language>(language)->setId("de");
+    std::vector<std::shared_ptr<ILanguage>> languages;
     languages.push_back(language);
     auto course = CourseStub::create(language, QVector<std::shared_ptr<Unit>>({}));
     ResourceRepositoryStub repository(languages, {course});

autotests/unittests/courseresource/test_courseresource.cpp

@@ -25,7 +25,7 @@
 #include "core/phrase.h"
 #include "core/phonemegroup.h"
 #include "core/resources/courseresource.h"
-
+#include <memory>
 #include <QTest>
 #include <QDebug>
 #include <QTemporaryFile>
@@ -50,14 +50,14 @@ void TestCourseResource::cleanup()
 
 void TestCourseResource::loadCourseResource()
 {
-    std::unique_ptr<Language> language(new Language);
-    language->setId("de");
-    auto group = language->addPhonemeGroup("id", "title");
+    std::shared_ptr<ILanguage> language(new Language);
+    std::static_pointer_cast<Language>(language)->setId("de");
+    auto group = std::static_pointer_cast<Language>(language)->addPhonemeGroup("id", "title");
     group->addPhoneme("g", "G");
     group->addPhoneme("u", "U");
-    std::vector<std::unique_ptr<Language>> languages;
-    languages.push_back(std::move(language));
-    ResourceRepositoryStub repository(std::move(languages));
+    std::vector<std::shared_ptr<ILanguage>> languages;
+    languages.push_back(language);
+    ResourceRepositoryStub repository(languages);
 
     const QString courseDirectory = "data/courses/de/";
     const QString courseFile = courseDirectory + "de.xml";
@@ -95,11 +95,9 @@ void TestCourseResource::loadCourseResource()
 void TestCourseResource::unitAddAndRemoveHandling()
 {
     // boilerplate
-    std::unique_ptr<Language> language(new Language);
-    language->setId("de");
-    std::vector<std::unique_ptr<Language>> languages;
-    languages.push_back(std::move(language));
-    ResourceRepositoryStub repository(std::move(languages));
+    std::shared_ptr<ILanguage> language(new Language);
+    std::static_pointer_cast<Language>(language)->setId("de");
+    ResourceRepositoryStub repository({language});
 
     const QString courseDirectory = "data/courses/de/";
     const QString courseFile = courseDirectory + "de.xml";
@@ -124,11 +122,9 @@ void TestCourseResource::unitAddAndRemoveHandling()
 void TestCourseResource::coursePropertyChanges()
 {
     // boilerplate
-    std::unique_ptr<Language> language(new Language);
-    language->setId("de");
-    std::vector<std::unique_ptr<Language>> languages;
-    languages.push_back(std::move(language));
-    ResourceRepositoryStub repository(std::move(languages));
+    std::shared_ptr<ILanguage> language(new Language);
+    std::static_pointer_cast<Language>(language)->setId("de");
+    ResourceRepositoryStub repository({language});
 
     const QString courseDirectory = "data/courses/de/";
     const QString courseFile = courseDirectory + "de.xml";

autotests/unittests/editablecourseresource/test_editablecourseresource.cpp

@@ -51,11 +51,9 @@ void TestEditableCourseResource::cleanup()
 
 void TestEditableCourseResource::loadCourseResource()
 {
-    std::unique_ptr<Language> language(new Language);
-    language->setId("de");
-    std::vector<std::unique_ptr<Language>> languages;
-    languages.push_back(std::move(language));
-    ResourceRepositoryStub repository(std::move(languages));
+    std::shared_ptr<ILanguage> language(new Language);
+    std::static_pointer_cast<Language>(language)->setId("de");
+    ResourceRepositoryStub repository({language});
 
     auto course = EditableCourseResource::create(QUrl::fromLocalFile(":/courses/de.xml"), &repository);
     QCOMPARE(course->file().toLocalFile(), ":/courses/de.xml");
@@ -90,11 +88,9 @@ void TestEditableCourseResource::loadCourseResource()
 void TestEditableCourseResource::unitAddAndRemoveHandling()
 {
     // boilerplate
-    std::unique_ptr<Language> language(new Language);
-    language->setId("de");
-    std::vector<std::unique_ptr<Language>> languages;
-    languages.push_back(std::move(language));
-    ResourceRepositoryStub repository(std::move(languages));
+    std::shared_ptr<ILanguage> language(new Language);
+    std::static_pointer_cast<Language>(language)->setId("de");
+    ResourceRepositoryStub repository({language});
     auto course = EditableCourseResource::create(QUrl::fromLocalFile(":/courses/de.xml"), &repository);
 
     // begin of test
@@ -116,11 +112,9 @@ void TestEditableCourseResource::unitAddAndRemoveHandling()
 void TestEditableCourseResource::coursePropertyChanges()
 {
     // boilerplate
-    std::unique_ptr<Language> language(new Language);
-    language->setId("de");
-    std::vector<std::unique_ptr<Language>> languages;
-    languages.push_back(std::move(language));
-    ResourceRepositoryStub repository(std::move(languages));
+    std::shared_ptr<ILanguage> language(new Language);
+    std::static_pointer_cast<Language>(language)->setId("de");
+    ResourceRepositoryStub repository({language});
     auto course = CourseResource::create(QUrl::fromLocalFile(":/courses/de.xml"), &repository);
 
     // id
@@ -187,11 +181,9 @@ void TestEditableCourseResource::coursePropertyChanges()
 void TestEditableCourseResource::fileLoadSaveCompleteness()
 {
     // boilerplate
-    std::unique_ptr<Language> language(new Language);
-    language->setId("de");
-    std::vector<std::unique_ptr<Language>> languages;
-    languages.push_back(std::move(language));
-    ResourceRepositoryStub repository(std::move(languages));
+    std::shared_ptr<ILanguage> language(new Language);
+    std::static_pointer_cast<Language>(language)->setId("de");
+    ResourceRepositoryStub repository({language});
     auto course = EditableCourseResource::create(QUrl::fromLocalFile(":/courses/de.xml"), &repository);
 
     QTemporaryFile outputFile;

autotests/unittests/editorsession/test_editorsession.cpp

@@ -92,11 +92,11 @@ public:
         m_description = description;
         emit descriptionChanged();
     }
-    std::shared_ptr<Language> language() const override
+    std::shared_ptr<ILanguage> language() const override
     {
         return m_language;
     }
-    void setLanguage(std::shared_ptr<Language> language) override
+    void setLanguage(std::shared_ptr<ILanguage> language) override
     {
         m_language = language;
         emit languageChanged();
@@ -133,7 +133,7 @@ private:
     QString m_title{ "title" };
     QString m_i18nTitle{ "i18n title" };
     QString m_description{ "description of the course" };
-    std::shared_ptr<Language> m_language;
+    std::shared_ptr<ILanguage> m_language;
     QVector<std::shared_ptr<Unit>> m_units;
 };
 

autotests/unittests/resourcerepository/test_resourcerepository.cpp

@@ -69,7 +69,7 @@ void TestResourceRepository::iResourceRepositoryCompatability()
 
     // test access of courses grouped by language
     auto languages = interface->languages();
-    std::shared_ptr<Language> german;
+    std::shared_ptr<ILanguage> german;
     for (auto language : interface->languages()) {
         if (language->id() == "de") {
             german = language;

src/CMakeLists.txt

@@ -44,6 +44,7 @@ set(artikulateCore_SRCS
     core/icourse.h
     core/ieditablecourse.h
     core/ieditablerepository.h
+    core/ilanguage.h
     core/iresourcerepository.h
     core/drawertrainingactions.cpp
     core/resourcerepository.cpp

src/application.cpp

@@ -21,11 +21,12 @@
 #include "application.h"
 
 #include "core/iresourcerepository.h"
+#include "core/ilanguage.h"
+#include "core/language.h"
 #include "core/contributorrepository.h"
 #include "core/drawertrainingactions.h"
 #include "core/trainingaction.h"
 #include "core/editorsession.h"
-#include "core/language.h"
 #include "core/phoneme.h"
 #include "core/phonemegroup.h"
 #include "core/phrase.h"
@@ -110,6 +111,7 @@ void Application::registerQmlTypes()
     qmlRegisterInterface<IResourceRepository>("IEditableRepository");
     qmlRegisterInterface<ICourse>("ICourse");
     qmlRegisterInterface<IEditableCourse>("IEditableCourse");
+    qmlRegisterInterface<ICourse>("ILanguage");
 
     // concrete instantiable types
     qmlRegisterType<LearnerProfile::Learner>("artikulate", 1, 0, "Learner");

src/core/contributorrepository.cpp

@@ -116,18 +116,18 @@ void ContributorRepository::setStorageLocation(const QString &path)
     m_storageLocation = path;
 }
 
-QVector<std::shared_ptr<Language>> ContributorRepository::languages() const
+QVector<std::shared_ptr<ILanguage>> ContributorRepository::languages() const
 {
     return m_languages;
 }
 
-std::shared_ptr<Language> ContributorRepository::language(int index) const
+std::shared_ptr<ILanguage> ContributorRepository::language(int index) const
 {
     Q_ASSERT(index >= 0 && index < m_languages.count());
     return m_languages.at(index);
 }
 
-Language * ContributorRepository::language(LearnerProfile::LearningGoal *learningGoal) const
+ILanguage * ContributorRepository::language(LearnerProfile::LearningGoal *learningGoal) const
 {
     if (!learningGoal) {
         return nullptr;
@@ -145,7 +145,7 @@ Language * ContributorRepository::language(LearnerProfile::LearningGoal *learnin
     return nullptr;
 }
 
-QVector<std::shared_ptr<EditableCourseResource>> ContributorRepository::courseResources(std::shared_ptr<Language> language)
+QVector<std::shared_ptr<EditableCourseResource>> ContributorRepository::courseResources(std::shared_ptr<ILanguage> language)
 {
     if (!language) {
         QVector<std::shared_ptr<EditableCourseResource>> courses;
@@ -198,7 +198,7 @@ QVector<std::shared_ptr<ICourse>> ContributorRepository::courses(const QString &
     return courses;
 }
 
-std::shared_ptr<IEditableCourse> ContributorRepository::editableCourse(std::shared_ptr<Language> language, int index) const
+std::shared_ptr<IEditableCourse> ContributorRepository::editableCourse(std::shared_ptr<ILanguage> language, int index) const
 {
     Q_ASSERT(m_courses.contains(language->id()));
     Q_ASSERT(index >= 0 && index < m_courses[language->id()].count());
@@ -400,7 +400,7 @@ void ContributorRepository::removeCourse(std::shared_ptr<ICourse> course)
     }
 }
 
-IEditableCourse * ContributorRepository::createCourse(std::shared_ptr<Language> language, std::shared_ptr<SkeletonResource> skeleton)
+IEditableCourse * ContributorRepository::createCourse(std::shared_ptr<ILanguage> language, std::shared_ptr<SkeletonResource> skeleton)
 {
     // set path
     QString path = QStringLiteral("%1/%2/%3/%4/%4.xml")

src/core/contributorrepository.h

@@ -76,17 +76,17 @@ public:
      */
     void setStorageLocation(const QString &path);
 
-    QVector<std::shared_ptr<Language>> languages() const override;
+    QVector<std::shared_ptr<ILanguage>> languages() const override;
 
     /**
      * \return language by \p index
      */
-    std::shared_ptr<Language> language(int index) const;
+    std::shared_ptr<ILanguage> language(int index) const;
 
     /**
      * \return language by \p learningGoal
      */
-    Q_INVOKABLE Language * language(LearnerProfile::LearningGoal* learningGoal) const;
+    Q_INVOKABLE ILanguage * language(LearnerProfile::LearningGoal* learningGoal) const;
 
     QVector<std::shared_ptr<ICourse>> courses() const override;
     QVector<std::shared_ptr<ICourse>> courses(const QString &languageId) const override;
@@ -95,9 +95,9 @@ public:
     /**
      * \return list of all loaded courses for language \p language
      */
-    QVector<std::shared_ptr<EditableCourseResource>> courseResources(std::shared_ptr<Language> language);
+    QVector<std::shared_ptr<EditableCourseResource>> courseResources(std::shared_ptr<ILanguage> language);
 
-    std::shared_ptr<IEditableCourse> editableCourse(std::shared_ptr<Language> language, int index) const override;
+    std::shared_ptr<IEditableCourse> editableCourse(std::shared_ptr<ILanguage> language, int index) const override;
 
     /**
      * Reset the file for this course or skeleton.
@@ -149,7 +149,7 @@ public:
      *
      * \return created course
      */
-    Q_INVOKABLE IEditableCourse * createCourse(std::shared_ptr<Language> language, std::shared_ptr<SkeletonResource> skeleton);
+    Q_INVOKABLE IEditableCourse * createCourse(std::shared_ptr<ILanguage> language, std::shared_ptr<SkeletonResource> skeleton);
 
     /**
      * Adds skeleton resource to resource manager
@@ -170,7 +170,7 @@ public:
 
 Q_SIGNALS:
     void languageResourceAdded();
-    void languageResourceAboutToBeAdded(std::shared_ptr<Language>,int);
+    void languageResourceAboutToBeAdded(std::shared_ptr<ILanguage>,int);
     void languageResourceRemoved();
     void languageResourceAboutToBeRemoved(int);
     void repositoryChanged();
@@ -187,7 +187,7 @@ private:
      */
     void loadLanguageResources();
     QString m_storageLocation;
-    QVector<std::shared_ptr<Language>> m_languages;
+    QVector<std::shared_ptr<ILanguage>> m_languages;
     QMap<QString, QVector<std::shared_ptr<EditableCourseResource>> > m_courses; //!> (language-id, course-resource)
     QVector<std::shared_ptr<IEditableCourse>> m_skeletonResources;
     QStringList m_loadedResources;

src/core/editorsession.cpp

@@ -86,7 +86,7 @@ void EditorSession::setSkeleton(IEditableCourse *skeleton)
     emit skeletonChanged();
 }
 
-Language * EditorSession::language() const
+ILanguage * EditorSession::language() const
 {
     return m_language;
 }
@@ -125,7 +125,7 @@ void EditorSession::setCourse(IEditableCourse *course)
     emit courseChanged();
 }
 
-void EditorSession::setCourseByLanguage(Language *language)
+void EditorSession::setCourseByLanguage(ILanguage *language)
 {
     if (!skeletonMode() || m_skeleton == nullptr) {
         qDebug() << "Course selection by language is only available in skeleton mode";

src/core/editorsession.h

@@ -24,7 +24,7 @@
 #include "artikulatecore_export.h"
 #include "phrase.h"
 
-class Language;
+class ILanguage;
 class IEditableCourse;
 class Unit;
 class SkeletonResource;
@@ -64,7 +64,7 @@ class ARTIKULATECORE_EXPORT EditorSession : public QObject
      * @brief the displayed course (skeleton or course) depending on the user selection
      */
     Q_PROPERTY(IEditableCourse *displayedCourse READ displayedCourse NOTIFY displayedCourseChanged)
-    Q_PROPERTY(Language *language READ language NOTIFY languageChanged)
+    Q_PROPERTY(ILanguage *language READ language NOTIFY languageChanged)
     Q_PROPERTY(Unit *unit READ unit WRITE setUnit NOTIFY unitChanged)
     Q_PROPERTY(Phrase *phrase READ phrase WRITE setPhrase NOTIFY phraseChanged)
     Q_PROPERTY(bool hasNextPhrase READ hasNextPhrase NOTIFY phraseChanged)
@@ -79,14 +79,14 @@ public:
     bool isEditSkeleton() const;
     IEditableCourse * skeleton() const;
     void setSkeleton(IEditableCourse *skeleton);
-    Language * language() const;
+    ILanguage * language() const;
     IEditableCourse * course() const;
     void setCourse(IEditableCourse *course);
     /**
      * @brief Open course resource by specifying the language
      * @param language the target language
      */
-    Q_INVOKABLE void setCourseByLanguage(Language *language);
+    Q_INVOKABLE void setCourseByLanguage(ILanguage *language);
     IEditableCourse * displayedCourse() const;
     Q_DECL_DEPRECATED Unit * unit() const;
     Unit * activeUnit() const;
@@ -124,7 +124,7 @@ private:
     IEditableRepository * m_repository{ nullptr };
     bool m_editSkeleton{ false };
     IEditableCourse *m_skeleton{ nullptr };
-    Language *m_language{ nullptr };
+    ILanguage *m_language{ nullptr };
     IEditableCourse *m_course{ nullptr };
     Unit *m_unit{ nullptr };
     Phrase *m_phrase{ nullptr };

src/core/icourse.h

@@ -28,7 +28,7 @@
 #include <memory>
 
 class QString;
-class Language;
+class ILanguage;
 class Unit;
 class Phoneme;
 
@@ -47,7 +47,7 @@ public:
     virtual QString title() const = 0;
     virtual QString i18nTitle() const = 0;
     virtual QString description() const = 0;
-    virtual std::shared_ptr<Language> language() const = 0;
+    virtual std::shared_ptr<ILanguage> language() const = 0;
     /**
      * @brief Lazy loading unit list
      * @return list of units in course

src/core/ieditablecourse.h

@@ -27,7 +27,7 @@
 #include <QObject>
 
 class QString;
-class Language;
+class ILanguage;
 
 class ARTIKULATECORE_EXPORT IEditableCourse : public ICourse
 {
@@ -38,7 +38,7 @@ public:
     virtual void setTitle(QString title) = 0;
     virtual void setI18nTitle(QString title) = 0;
     virtual void setDescription(QString description) = 0;
-    virtual void setLanguage(std::shared_ptr<Language> language) = 0;
+    virtual void setLanguage(std::shared_ptr<ILanguage> language) = 0;
     virtual std::shared_ptr<Unit> addUnit(std::unique_ptr<Unit> unit) = 0;
     virtual bool exportToFile(const QUrl &filePath) const = 0;
     virtual bool isModified() const = 0;

src/core/ieditablerepository.h

@@ -26,7 +26,7 @@
 #include <memory>
 
 class IEditableCourse;
-class Language;
+class ILanguage;
 
 /**
  * \class IEditableRepository
@@ -39,7 +39,7 @@ class ARTIKULATECORE_EXPORT IEditableRepository : public IResourceRepository
 public:
     virtual ~IEditableRepository() = default;
     virtual QVector<std::shared_ptr<IEditableCourse>> editableCourses() const = 0;
-    virtual std::shared_ptr<IEditableCourse> editableCourse(std::shared_ptr<Language> language, int index) const = 0;
+    virtual std::shared_ptr<IEditableCourse> editableCourse(std::shared_ptr<ILanguage> language, int index) const = 0;
     virtual QVector<std::shared_ptr<IEditableCourse>> skeletons() const = 0;
     /**
      * Imports units and phrases from skeleton, deassociates removed ones.

src/core/ilanguage.h

+/*
+ *  Copyright 2019  Andreas Cord-Landwehr <cordlandwehr@kde.org>
+ *
+ *  This program 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 2 of
+ *  the License or (at your option) version 3 or any later version
+ *  accepted by the membership of KDE e.V. (or its successor approved
+ *  by the membership of KDE e.V.), which shall act as a proxy
+ *  defined in Section 14 of version 3 of the license.
+ *
+ *  This program 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