src/main/java/de/thm/arsnova/entities/ServiceDescription.java

-package de.thm.arsnova.entities;
-
-public class ServiceDescription {
-	private String id;
-	private String name;
-	private String dialogUrl;
-	private String image;
-	private int order = 0;
-	private boolean allowLecturer = true;
-
-	public ServiceDescription(String id, String name, String dialogUrl) {
-		this.id = id;
-		this.name = name;
-		this.dialogUrl = dialogUrl;
-	}
-
-	public ServiceDescription(String id, String name, String dialogUrl, String image) {
-		this.id = id;
-		this.name = name;
-		this.dialogUrl = dialogUrl;
-		if (!"".equals(image)) {
-			this.image = image;
-		}
-	}
-
-	public ServiceDescription(String id, String name, String dialogUrl, boolean allowLecturer) {
-		this.id = id;
-		this.name = name;
-		this.dialogUrl = dialogUrl;
-		this.allowLecturer = allowLecturer;
-	}
-
-	public String getId() {
-		return id;
-	}
-
-	public void setId(String id) {
-		this.id = id;
-	}
-
-	public String getName() {
-		return name;
-	}
-
-	public void setName(String name) {
-		this.name = name;
-	}
-
-	public String getDialogUrl() {
-		return dialogUrl;
-	}
-
-	public void setDialogUrl(String dialogUrl) {
-		this.dialogUrl = dialogUrl;
-	}
-
-	public String getImage() {
-		return image;
-	}
-
-	public void setImage(String image) {
-		this.image = image;
-	}
-
-	public int getOrder() {
-		return order;
-	}
-
-	public void setOrder(int order) {
-		this.order = order;
-	}
-
-	public boolean isAllowLecturer() {
-		return allowLecturer;
-	}
-
-	public void setAllowLecturer(boolean allowLecturer) {
-		this.allowLecturer = allowLecturer;
-	}
-}

src/main/java/de/thm/arsnova/entities/Session.java

-/*
- * Copyright (C) 2012 THM webMedia
- *
- * This file is part of ARSnova.
- *
- * ARSnova 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.
- *
- * ARSnova 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 this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-package de.thm.arsnova.entities;
-
-import java.io.Serializable;
-import java.util.List;
-
-import com.fasterxml.jackson.annotation.JsonIgnore;
-
-public class Session implements Serializable {
-
-	private static final long serialVersionUID = 1L;
-
-	private String type;
-	private String name;
-	private String shortName;
-	private String keyword;
-	private String creator;
-	private boolean active;
-	private long lastOwnerActivity;
-	private String courseType;
-	private String courseId;
-	private List<String> _conflicts;
-
-	private String _id;
-	private String _rev;
-
-	public String getType() {
-		return type;
-	}
-
-	public void setType(final String type) {
-		this.type = type;
-	}
-
-	public String getName() {
-		return name;
-	}
-
-	public void setName(final String name) {
-		this.name = name;
-	}
-
-	public String getShortName() {
-		return shortName;
-	}
-
-	public void setShortName(final String shortName) {
-		this.shortName = shortName;
-	}
-
-	public String getKeyword() {
-		return keyword;
-	}
-
-	public void setKeyword(final String keyword) {
-		this.keyword = keyword;
-	}
-
-	public String getCreator() {
-		return creator;
-	}
-
-	public void setCreator(final String creator) {
-		this.creator = creator;
-	}
-
-	public boolean isActive() {
-		return active;
-	}
-
-	public void setActive(final boolean active) {
-		this.active = active;
-	}
-
-	public long getLastOwnerActivity() {
-		return lastOwnerActivity;
-	}
-
-	public void setLastOwnerActivity(final long lastOwnerActivity) {
-		this.lastOwnerActivity = lastOwnerActivity;
-	}
-
-	public void set_id(final String id) {
-		_id = id;
-	}
-
-	public String get_id() {
-		return _id;
-	}
-
-	public void set_rev(final String rev) {
-		_rev = rev;
-	}
-
-	public String get_rev() {
-		return _rev;
-	}
-
-	public void set_conflicts(final List<String> conflicts) {
-		_conflicts = conflicts;
-	}
-
-	public List<String> get_conflicts() {
-		return _conflicts;
-	}
-
-	public boolean isCreator(final User user) {
-		return user.getUsername().equals(creator);
-	}
-
-	public String getCourseType() {
-		return courseType;
-	}
-
-	public void setCourseType(final String courseType) {
-		this.courseType = courseType;
-	}
-
-	public String getCourseId() {
-		return courseId;
-	}
-
-	public void setCourseId(final String courseId) {
-		this.courseId = courseId;
-	}
-
-	@JsonIgnore
-	public boolean isCourseSession() {
-		return getCourseId() != null && !getCourseId().isEmpty();
-	}
-
-	@Override
-	public String toString() {
-		return "Session [keyword=" + keyword+ ", type=" + type + "]";
-	}
-}

src/main/java/de/thm/arsnova/entities/Statistics.java

-package de.thm.arsnova.entities;
-
-public class Statistics {
-
-	private int answers;
-	private int questions;
-	private int openSessions;
-	private int closedSessions;
-	private int activeUsers;
-	private int loggedinUsers;
-
-	public int getAnswers() {
-		return answers;
-	}
-	public void setAnswers(final int answers) {
-		this.answers = answers;
-	}
-
-	public int getQuestions() {
-		return questions;
-	}
-	public void setQuestions(final int questions) {
-		this.questions = questions;
-	}
-
-	public int getOpenSessions() {
-		return openSessions;
-	}
-	public void setOpenSessions(final int openSessions) {
-		this.openSessions = openSessions;
-	}
-
-	public int getClosedSessions() {
-		return closedSessions;
-	}
-	public void setClosedSessions(final int closedSessions) {
-		this.closedSessions = closedSessions;
-	}
-
-	public int getActiveUsers() {
-		return activeUsers;
-	}
-	public void setActiveUsers(final int activeUsers) {
-		this.activeUsers = activeUsers;
-	}
-
-	public int getLoggedinUsers() {
-		return loggedinUsers;
-	}
-	public void setLoggedinUsers(final int loggedinUsers) {
-		this.loggedinUsers = loggedinUsers;
-	}
-
-	public int getAverageAnswersPerQuestion() {
-		if (getQuestions() > 0) {
-			return getAnswers() / getQuestions();
-		}
-		return 0;
-	}
-	public void setAverageAnswersPerQuestion(final int value) {
-		// NOP
-	}
-
-	@Override
-	public int hashCode() {
-		return (this.getClass().getName()
-				+ activeUsers
-				+ answers
-				+ closedSessions
-				+ openSessions
-				+ questions
-				+ loggedinUsers
-				).hashCode();
-	}
-
-	@Override
-	public boolean equals(final Object obj) {
-		if (obj == null) {
-			return false;
-		}
-		if (obj == this) {
-			return true;
-		}
-		if (obj instanceof Statistics) {
-			final Statistics other = (Statistics) obj;
-			return hashCode() == other.hashCode();
-		}
-
-		return false;
-	}
-}

src/main/java/de/thm/arsnova/entities/User.java

-package de.thm.arsnova.entities;
-
-import java.io.Serializable;
-
-import org.jasig.cas.client.authentication.AttributePrincipal;
-import org.scribe.up.profile.facebook.FacebookProfile;
-import org.scribe.up.profile.google.Google2Profile;
-import org.scribe.up.profile.twitter.TwitterProfile;
-import org.springframework.security.authentication.AnonymousAuthenticationToken;
-import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
-
-import de.thm.arsnova.services.UserSessionService;
-
-public class User implements Serializable {
-	public static final String GOOGLE = "google";
-	public static final String TWITTER = "twitter";
-	public static final String FACEBOOK = "facebook";
-	public static final String THM = "thm";
-	public static final String LDAP = "ldap";
-	public static final String ARSNOVA = "arsnova";
-	public static final String ANONYMOUS = "anonymous";
-	public static final String GUEST = "guest";
-
-	private static final long serialVersionUID = 1L;
-	private String username;
-	private String type;
-	private UserSessionService.Role role;
-
-	public User(Google2Profile profile) {
-		setUsername(profile.getEmail());
-		setType(User.GOOGLE);
-	}
-
-	public User(TwitterProfile profile) {
-		setUsername(profile.getScreenName());
-		setType(User.TWITTER);
-	}
-
-	public User(FacebookProfile profile) {
-		setUsername(profile.getLink());
-		setType(User.FACEBOOK);
-	}
-
-	public User(AttributePrincipal principal) {
-		setUsername(principal.getName());
-		setType(User.THM);
-	}
-
-	public User(AnonymousAuthenticationToken token) {
-		setUsername(User.ANONYMOUS);
-		setType(User.ANONYMOUS);
-	}
-
-	public User(UsernamePasswordAuthenticationToken token) {
-		setUsername(token.getName());
-		setType(LDAP);
-	}
-
-	public String getUsername() {
-		return username;
-	}
-
-	public void setUsername(String username) {
-		this.username = username;
-	}
-
-	public String getType() {
-		return type;
-	}
-
-	public void setType(String type) {
-		this.type = type;
-	}
-
-	public UserSessionService.Role getRole() {
-		return role;
-	}
-
-	public void setRole(UserSessionService.Role role) {
-		this.role = role;
-	}
-
-	public boolean hasRole(UserSessionService.Role role) {
-		return this.role == role;
-	}
-
-	@Override
-	public String toString() {
-		return "User [username=" + username + ", type=" + type + "]";
-	}
-
-	@Override
-	public int hashCode() {
-		// See http://stackoverflow.com/a/113600
-		final int theAnswer = 42;
-		final int theOthers = 37;
-
-		int result = theAnswer;
-		result = theOthers * result + this.username.hashCode();
-		return theOthers * result + this.type.hashCode();
-	}
-
-	@Override
-	public boolean equals(Object obj) {
-		if (obj == null || !obj.getClass().equals(this.getClass())) {
-			return false;
-		}
-		User other = (User) obj;
-		return this.username.equals(other.username) && this.type.equals(other.type);
-	}
-
-}

src/main/java/de/thm/arsnova/entities/package-info.java

-package de.thm.arsnova.entities;

src/main/java/de/thm/arsnova/event/AfterCreationEvent.java

+/*
+ * This file is part of ARSnova Backend.
+ * Copyright (C) 2012-2019 The ARSnova Team and Contributors
+ *
+ * ARSnova Backend 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.
+ *
+ * ARSnova Backend 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package de.thm.arsnova.event;
+
+import de.thm.arsnova.model.Entity;
+
+public class AfterCreationEvent<E extends Entity> extends CrudEvent<E> {
+	public AfterCreationEvent(final Object source, final E entity) {
+		super(source, entity);
+	}
+}

src/main/java/de/thm/arsnova/event/AfterDeletionEvent.java

+/*
+ * This file is part of ARSnova Backend.
+ * Copyright (C) 2012-2019 The ARSnova Team and Contributors
+ *
+ * ARSnova Backend 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.
+ *
+ * ARSnova Backend 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package de.thm.arsnova.event;
+
+import de.thm.arsnova.model.Entity;
+
+public class AfterDeletionEvent<E extends Entity> extends CrudEvent<E> {
+	public AfterDeletionEvent(final Object source, final E entity) {
+		super(source, entity);
+	}
+}

src/main/java/de/thm/arsnova/event/AfterFullUpdateEvent.java

+/*
+ * This file is part of ARSnova Backend.
+ * Copyright (C) 2012-2019 The ARSnova Team and Contributors
+ *
+ * ARSnova Backend 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.
+ *
+ * ARSnova Backend 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package de.thm.arsnova.event;
+
+import de.thm.arsnova.model.Entity;
+
+public class AfterFullUpdateEvent<E extends Entity> extends AfterUpdateEvent<E> {
+	private final E oldEntity;
+
+	public AfterFullUpdateEvent(final Object source, final E entity, final E oldEntity) {
+		super(source, entity);
+		this.oldEntity = oldEntity;
+	}
+
+	public E getOldEntity() {
+		return oldEntity;
+	}
+}

src/main/java/de/thm/arsnova/event/AfterPatchEvent.java

+/*
+ * This file is part of ARSnova Backend.
+ * Copyright (C) 2012-2019 The ARSnova Team and Contributors
+ *
+ * ARSnova Backend 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.
+ *
+ * ARSnova Backend 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package de.thm.arsnova.event;
+
+import java.util.Map;
+import java.util.function.Function;
+
+import de.thm.arsnova.model.Entity;
+
+public class AfterPatchEvent<E extends Entity> extends AfterUpdateEvent<E> {
+	private final Function<E, ? extends Object> propertyGetter;
+	private final Map<String, Object> changes;
+
+	public AfterPatchEvent(final Object source, final E entity, final Function<E, ? extends Object> propertyGetter,
+			final Map<String, Object> changes) {
+		super(source, entity);
+		this.propertyGetter = propertyGetter;
+		this.changes = changes;
+	}
+
+	public Function<E, ? extends Object> getPropertyGetter() {
+		return propertyGetter;
+	}
+
+	public Map<String, Object> getChanges() {
+		return changes;
+	}
+}

src/main/java/de/thm/arsnova/event/AfterUpdateEvent.java

+/*
+ * This file is part of ARSnova Backend.
+ * Copyright (C) 2012-2019 The ARSnova Team and Contributors
+ *
+ * ARSnova Backend 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.
+ *
+ * ARSnova Backend 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package de.thm.arsnova.event;
+
+import de.thm.arsnova.model.Entity;
+
+public abstract class AfterUpdateEvent<E extends Entity> extends CrudEvent<E> {
+	public AfterUpdateEvent(final Object source, final E entity) {
+		super(source, entity);
+	}
+}

src/main/java/de/thm/arsnova/event/ArsnovaEvent.java

+/*
+ * This file is part of ARSnova Backend.
+ * Copyright (C) 2012-2019 The ARSnova Team and Contributors
+ *
+ * ARSnova Backend 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.
+ *
+ * ARSnova Backend 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package de.thm.arsnova.event;
+
+import org.springframework.context.ApplicationEvent;
+
+/**
+ * Base class of an ARSnova event.
+ */
+public abstract class ArsnovaEvent extends ApplicationEvent {
+
+	private static final long serialVersionUID = 1L;
+
+	public ArsnovaEvent(final Object source) {
+		super(source);
+	}
+
+}

src/main/java/de/thm/arsnova/event/BeforeCreationEvent.java

+/*
+ * This file is part of ARSnova Backend.
+ * Copyright (C) 2012-2019 The ARSnova Team and Contributors
+ *
+ * ARSnova Backend 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.
+ *
+ * ARSnova Backend 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package de.thm.arsnova.event;
+
+import de.thm.arsnova.model.Entity;
+
+public class BeforeCreationEvent<E extends Entity> extends CrudEvent<E> {
+	public BeforeCreationEvent(final Object source, final E entity) {
+		super(source, entity);
+	}
+}

src/main/java/de/thm/arsnova/event/BeforeDeletionEvent.java

+/*
+ * This file is part of ARSnova Backend.
+ * Copyright (C) 2012-2019 The ARSnova Team and Contributors
+ *
+ * ARSnova Backend 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.
+ *
+ * ARSnova Backend 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package de.thm.arsnova.event;
+
+import de.thm.arsnova.model.Entity;
+
+public class BeforeDeletionEvent<E extends Entity> extends CrudEvent<E> {
+	public BeforeDeletionEvent(final Object source, final E entity) {
+		super(source, entity);
+	}
+}

src/main/java/de/thm/arsnova/event/BeforeFullUpdateEvent.java

+/*
+ * This file is part of ARSnova Backend.
+ * Copyright (C) 2012-2019 The ARSnova Team and Contributors
+ *
+ * ARSnova Backend 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.
+ *
+ * ARSnova Backend 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package de.thm.arsnova.event;
+
+import de.thm.arsnova.model.Entity;
+
+public class BeforeFullUpdateEvent<E extends Entity> extends BeforeUpdateEvent<E> {
+	private final E oldEntity;
+
+	public BeforeFullUpdateEvent(final Object source, final E entity, final E oldEntity) {
+		super(source, entity);
+		this.oldEntity = oldEntity;
+	}
+
+	public E getOldEntity() {
+		return oldEntity;
+	}
+}

src/main/java/de/thm/arsnova/event/BeforePatchEvent.java

+/*
+ * This file is part of ARSnova Backend.
+ * Copyright (C) 2012-2019 The ARSnova Team and Contributors
+ *
+ * ARSnova Backend 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.
+ *
+ * ARSnova Backend 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package de.thm.arsnova.event;
+
+import java.util.Map;
+import java.util.function.Function;
+
+import de.thm.arsnova.model.Entity;
+
+public class BeforePatchEvent<E extends Entity> extends BeforeUpdateEvent<E> {
+	private final Function<E, ? extends Object> propertyGetter;
+	private final Map<String, Object> changes;
+
+	public BeforePatchEvent(final Object source, final E entity, final Function<E, ? extends Object> propertyGetter,
+			final Map<String, Object> changes) {
+		super(source, entity);
+		this.propertyGetter = propertyGetter;
+		this.changes = changes;
+	}
+
+	public Function<E, ? extends Object> getPropertyGetter() {
+		return propertyGetter;
+	}
+
+	public Map<String, Object> getChanges() {
+		return changes;
+	}
+}

src/main/java/de/thm/arsnova/event/BeforeUpdateEvent.java

+/*
+ * This file is part of ARSnova Backend.
+ * Copyright (C) 2012-2019 The ARSnova Team and Contributors
+ *
+ * ARSnova Backend 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.
+ *
+ * ARSnova Backend 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package de.thm.arsnova.event;
+
+import de.thm.arsnova.model.Entity;
+
+public abstract class BeforeUpdateEvent<E extends Entity> extends CrudEvent<E> {
+	public BeforeUpdateEvent(final Object source, final E entity) {
+		super(source, entity);
+	}
+}

src/main/java/de/thm/arsnova/event/ChangeScoreEvent.java

+/*
+ * This file is part of ARSnova Backend.
+ * Copyright (C) 2012-2019 The ARSnova Team and Contributors
+ *
+ * ARSnova Backend 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.
+ *
+ * ARSnova Backend 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package de.thm.arsnova.event;
+
+/**
+ * Fires whenever a score related value changes.
+ */
+public class ChangeScoreEvent extends RoomEvent {
+
+	private static final long serialVersionUID = 1L;
+
+	public ChangeScoreEvent(final Object source, final String roomId) {
+		super(source, roomId);
+	}
+
+}

src/main/java/de/thm/arsnova/event/CrudEvent.java

+/*
+ * This file is part of ARSnova Backend.
+ * Copyright (C) 2012-2019 The ARSnova Team and Contributors
+ *
+ * ARSnova Backend 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.
+ *
+ * ARSnova Backend 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package de.thm.arsnova.event;
+
+import org.springframework.context.ApplicationEvent;
+import org.springframework.core.ResolvableType;
+import org.springframework.core.ResolvableTypeProvider;
+
+import de.thm.arsnova.model.Entity;
+
+public abstract class CrudEvent<E extends Entity> extends ApplicationEvent implements ResolvableTypeProvider {
+	private E entity;
+
+	public CrudEvent(final Object source, final E entity) {
+		super(source);
+		this.entity = entity;
+	}
+
+	public E getEntity() {
+		return entity;
+	}
+
+	@Override
+	public ResolvableType getResolvableType() {
+		return ResolvableType.forClassWithGenerics(getClass(), entity.getClass());
+	}
+}

src/main/java/de/thm/arsnova/event/DeleteFeedbackForRoomsEvent.java

+/*
+ * This file is part of ARSnova Backend.
+ * Copyright (C) 2012-2019 The ARSnova Team and Contributors
+ *
+ * ARSnova Backend 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.
+ *
+ * ARSnova Backend 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package de.thm.arsnova.event;
+
+import java.util.Set;
+
+import de.thm.arsnova.model.Room;
+
+/**
+ * Fires whenever the feedback of a specific user has been reset.
+ */
+public class DeleteFeedbackForRoomsEvent extends ArsnovaEvent {
+
+	private static final long serialVersionUID = 1L;
+
+	private final Set<Room> sessions;
+
+	private final String userId;
+
+	public DeleteFeedbackForRoomsEvent(final Object source, final Set<Room> rooms, final String userId) {
+		super(source);
+		this.sessions = rooms;
+		this.userId = userId;
+	}
+
+	public Set<Room> getSessions() {
+		return sessions;
+	}
+
+	public String getUserId() {
+		return userId;
+	}
+
+}

src/main/java/de/thm/arsnova/event/FlipFlashcardsEvent.java

+/*
+ * This file is part of ARSnova Backend.
+ * Copyright (C) 2012-2019 The ARSnova Team and Contributors
+ *
+ * ARSnova Backend 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.
+ *
+ * ARSnova Backend 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package de.thm.arsnova.event;
+
+/**
+ * Fires whenever voting on a question is disabled.
+ */
+public class FlipFlashcardsEvent extends RoomEvent {
+
+	private static final long serialVersionUID = 1L;
+
+	public FlipFlashcardsEvent(final Object source, final String roomId) {
+		super(source, roomId);
+	}
+}