Merge branch 'downgrade_exam_config' into development

# Conflicts:
#	src/main/java/ch/ethz/seb/sebserver/gui/service/examconfig/impl/AttributeMapping.java
#	src/main/resources/config/application-dev-ws.properties

src/main/java/ch/ethz/seb/sebserver/gui/service/examconfig/impl/AttributeMapping.java

@@ -74,7 +74,6 @@ public class AttributeMapping {
 
         this.orientationAttributeNameMapping = Utils.immutableMapOf(orientations
                 .stream()
-                .filter(o -> this.attributeIdMapping.containsKey(o.attributeId))
                 .collect(Collectors.toMap(
                         o -> this.attributeIdMapping.get(o.attributeId).name,
                         Function.identity(),

src/main/java/ch/ethz/seb/sebserver/webservice/DBIntegrityChecker.java

@@ -60,11 +60,16 @@ public class DBIntegrityChecker {
 
             final Result<String> applyCheck = dbIntegrityCheck.applyCheck(this.tryFix);
             if (applyCheck.hasError()) {
+                if (applyCheck.getError() instanceof  WebserviceInitException) {
+                    throw applyCheck.getError();
+                }
                 SEBServerInit.INIT_LOGGER.info("--------> Unexpected Error: {}", applyCheck.getError().getMessage());
             } else {
                 SEBServerInit.INIT_LOGGER.info("--------> Result: {}", applyCheck.get());
             }
 
+        } catch (final WebserviceInitException initE) {
+            throw initE;
         } catch (final Exception e) {
             log.error("Unexpected error while trying to apply data base integrity check: {}", dbIntegrityCheck);
         }

src/main/java/ch/ethz/seb/sebserver/webservice/WebserviceInit.java

@@ -104,10 +104,10 @@ public class WebserviceInit implements ApplicationListener<ApplicationReadyEvent
 
         this.applicationEventPublisher.publishEvent(new SEBServerInitEvent(this));
 
-        // Run the data base integrity checks and fixes if configured
+        // Run the database integrity checks and fixes if configured
         this.dbIntegrityChecker.checkIntegrity();
 
-        // Create an initial admin account if requested and not already in the data-base
+        // Create an initial admin account if requested and not already in the database
         this.adminUserInitializer.initAdminAccount();
 
         SEBServerInit.INIT_LOGGER.info("----> *********************************************************");

src/main/java/ch/ethz/seb/sebserver/webservice/WebserviceInitException.java

@@ -0,0 +1,12 @@
+package ch.ethz.seb.sebserver.webservice;
+
+public class WebserviceInitException extends RuntimeException {
+
+    public WebserviceInitException(final String message) {
+        super(message);
+    }
+
+    public WebserviceInitException(final String message, final Throwable cause) {
+        super(message, cause);
+    }
+}

src/main/java/ch/ethz/seb/sebserver/webservice/datalayer/checks/DowngradeSEBSettingsCheck.java

@@ -0,0 +1,152 @@
+package ch.ethz.seb.sebserver.webservice.datalayer.checks;
+
+import javax.sql.DataSource;
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import ch.ethz.seb.sebserver.gbl.Constants;
+import ch.ethz.seb.sebserver.gbl.profile.WebServiceProfile;
+import ch.ethz.seb.sebserver.gbl.util.Result;
+import ch.ethz.seb.sebserver.webservice.DBIntegrityCheck;
+import ch.ethz.seb.sebserver.webservice.WebserviceInitException;
+import ch.ethz.seb.sebserver.webservice.datalayer.batis.mapper.*;
+import ch.ethz.seb.sebserver.webservice.datalayer.batis.model.ConfigurationAttributeRecord;
+import ch.ethz.seb.sebserver.webservice.datalayer.batis.model.OrientationRecord;
+import org.apache.commons.lang3.StringUtils;
+import org.mybatis.dynamic.sql.SqlBuilder;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Lazy;
+import org.springframework.stereotype.Component;
+
+@Lazy
+@Component
+@WebServiceProfile
+public class DowngradeSEBSettingsCheck implements DBIntegrityCheck {
+
+    public static final Logger INIT_LOGGER = LoggerFactory.getLogger("ch.ethz.seb.SEB_SERVER_INIT");
+
+    private final OrientationRecordMapper orientationRecordMapper;
+    private final ConfigurationAttributeRecordMapper configurationAttributeRecordMapper;
+    private final DataSource dataSource;
+    private final String schemaName;
+    private final Long lastMigrationVersion = 22L;
+    private final String versionAttributeIds =
+            "1,2,3,4,8,10,11,12,13,14,15,16,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,42,43,44,45,46,47,48," +
+            "50,51,52,53,54,55,56,57,58,59,60,61,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,81,82,85,86,87,88," +
+            "89,90,91,92,93,94,95,96,97,98,99,100,200,201,202,203,204,205,206,210,220,221,222,223,231,233,234,235,236," +
+            "237,238,239,240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255,256,257,258,259,260,261,262," +
+            "263,264,265,300,301,302,303,304,305,306,307,308,309,310,311,312,313,314,315,316,317,318,319,320,321,322," +
+            "400,401,402,403,404,405,406,407,408,500,501,502,503,504,505,506,507,508,509,510,511,512,513,514,515,516," +
+            "517,518,519,520,804,812,900,901,904,919,928,940,941,942,950,951,952,953,960,961,970,971,972,973,974,975," +
+            "1100,1101,1102,1103,1104,1105,1106,1108,1116,1120,1121,1122,1123,1124,1125,1129,1130,1131,1132,1133,1500," +
+            "1501,1502,1503,1504,1505,1506,1508,1516,1530,1531,1532,1533,1551,1578,";
+    private final boolean fixDowngrade;
+
+    public DowngradeSEBSettingsCheck(
+            final OrientationRecordMapper orientationRecordMapper,
+            final ConfigurationAttributeRecordMapper configurationAttributeRecordMapper,
+            final DataSource dataSource,
+            @Value("${sebserver.init.database.integrity.fix.downgrade:false}") final boolean fixDowngrade,
+            @Value("${sebserver.init.database.integrity.check.schema:SEBServer}") final String schemaName) {
+
+        this.orientationRecordMapper = orientationRecordMapper;
+        this.configurationAttributeRecordMapper = configurationAttributeRecordMapper;
+        this.dataSource = dataSource;
+        this.fixDowngrade = fixDowngrade;
+        this.schemaName = schemaName;
+    }
+
+    @Override
+    public String name() {
+        return "DowngradeSEBSettingsCheck";
+    }
+
+    @Override
+    public String description() {
+        return "Check if there are additional SEB Settings orientations within the database that do not match the once for the current SEB Server version.";
+    }
+
+    @Override
+    public Result<String> applyCheck(final boolean tryFix) {
+        return Result.tryCatch(() -> {
+
+            final String[] split = StringUtils.split(versionAttributeIds, Constants.LIST_SEPARATOR_CHAR);
+            final List<Long> config_attrs_ids = Arrays.stream(split).map(s -> {
+                try {
+                    return Long.valueOf(s.trim());
+                } catch (final Exception e) {
+                    return 0L;
+                }
+            }).collect(Collectors.toList());
+
+            final List<Long> attributeIds = orientationRecordMapper.selectByExample()
+                    .where(OrientationRecordDynamicSqlSupport.templateId, SqlBuilder.isEqualTo(0L))
+                    .and(OrientationRecordDynamicSqlSupport.configAttributeId, SqlBuilder.isNotIn(config_attrs_ids))
+                    .build()
+                    .execute()
+                    .stream()
+                    .map(OrientationRecord::getConfigAttributeId)
+                    .collect(Collectors.toList());
+
+            if (attributeIds.isEmpty()) {
+                return  "No additional SEB Settings orientations for downgrading found.";
+            }
+
+            final Set<String> allNames = configurationAttributeRecordMapper
+                    .selectByExample()
+                    .where(ConfigurationAttributeRecordDynamicSqlSupport.id, SqlBuilder.isIn(attributeIds))
+                    .build()
+                    .execute()
+                    .stream()
+                    .map(ConfigurationAttributeRecord::getName)
+                    .collect(Collectors.toSet());
+
+            if (!fixDowngrade) {
+                INIT_LOGGER.error(" ---> !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
+                INIT_LOGGER.error(" ---> !!! Detected a Database version integrity violation, probably due to SEB Server version downgrade.");
+                INIT_LOGGER.error(" ---> !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
+                INIT_LOGGER.error(" ---> !!!! Please check the following correction and set 'sebserver.init.database.integrity.fix.downgrade'");
+                INIT_LOGGER.error(" ---> !!!! to true to apply repair with next startup. Then SEB Server will apply the repair task");
+                INIT_LOGGER.error(" ---> !!!! After successfully repair you can set 'sebserver.init.database.integrity.fix.downgrade' back to false ");
+                INIT_LOGGER.error(" ---> !!!! NOTE: Repair will delete the following SEB Settings orientation for Exam Configuration default Views");
+                INIT_LOGGER.error(" ---> !!!!       Exam Configurations built from Configuration Template will stay the same and might have incorrect View Tabs");
+                INIT_LOGGER.error(" ---> !!!! Repair will remove following SEB Settings from default view:\n {}", allNames);
+                INIT_LOGGER.error(" ---> !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
+                throw new WebserviceInitException("Detected a Database version integrity violation, probably due to SEB Server version downgrade. See logs above");
+                //return "Downgrade SEB Settings correction would delete the following SEB Settings: " + allNames;
+            } else {
+                try {
+                    final Integer deletedOrientation = orientationRecordMapper
+                            .deleteByExample()
+                            .where(OrientationRecordDynamicSqlSupport.configAttributeId, SqlBuilder.isIn(attributeIds))
+                            .and(OrientationRecordDynamicSqlSupport.templateId, SqlBuilder.isEqualTo(0L))
+                            .build()
+                            .execute();
+
+                    INIT_LOGGER.info(" ---> Deleted {} entries from table orientation", deletedOrientation);
+
+                    INIT_LOGGER.info(" ---> Try delete migration task until this version...");
+
+                    final Connection connection = this.dataSource.getConnection();
+                    final PreparedStatement prepareStatement = connection.prepareStatement(
+                            "DELETE FROM "+ schemaName +".flyway_schema_history WHERE version > " + lastMigrationVersion);
+                    prepareStatement.execute();
+
+                    INIT_LOGGER.info(" ---> Deleted {} entries from table flyway_schema_history", deletedOrientation);
+
+                    return "Successfully deleted SEB Settings attributes: " + allNames;
+                } catch (final Exception e) {
+                    INIT_LOGGER.error("Failed to delete SEB Settings attributes: ", e);
+                    return "Failed to delete SEB Settings attributes: " + allNames;
+                }
+            }
+        });
+    }
+}

src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/dao/impl/ConfigurationAttributeDAOImpl.java

@@ -10,11 +10,7 @@ package ch.ethz.seb.sebserver.webservice.servicelayer.dao.impl;
 
 import static org.mybatis.dynamic.sql.SqlBuilder.isIn;
 
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.List;
-import java.util.Set;
+import java.util.*;
 import java.util.function.Predicate;
 import java.util.stream.Collectors;