Add restrictions by number of users and resources

A new column in configuration has been added and it should me modified manually
to limit the number of users and resources.

libreplan-business/src/main/java/org/libreplan/business/common/entities/Configuration.java

@@ -113,6 +113,18 @@ public class Configuration extends BaseEntity {
 
     private PersonalTimesheetsPeriodicityEnum personalTimesheetsPeriodicity = PersonalTimesheetsPeriodicityEnum.MONTHLY;
 
+    /**
+     * Maximum users configurable directly in database for SaaS products. If
+     * zero it means that there isn't any limitation.
+     */
+    private Integer maxUsers = 0;
+
+    /**
+     * Maximum resources configurable directly in database for SaaS products. If
+     * zero it means that there isn't any limitation.
+     */
+    private Integer maxResources = 0;
+
     public void setDefaultCalendar(BaseCalendar defaultCalendar) {
         this.defaultCalendar = defaultCalendar;
     }
@@ -470,4 +482,12 @@ public class Configuration extends BaseEntity {
         this.personalTimesheetsPeriodicity = personalTimesheetsPeriodicity;
     }
 
+    public Integer getMaxUsers() {
+        return maxUsers;
+    }
+
+    public Integer getMaxResources() {
+        return maxResources;
+    }
+
 }

libreplan-business/src/main/java/org/libreplan/business/resources/entities/Resource.java

@@ -1186,4 +1186,17 @@ public abstract class Resource extends IntegrationEntity implements
                 resource.getShortDescription());
     }
 
+    @AssertTrue(message = "You have exceeded the maximum limit of users")
+    public boolean checkMaxUsers() {
+        Integer maxResources = Registry.getConfigurationDAO()
+                .getConfiguration().getMaxResources();
+        if (maxResources != null && maxResources > 0) {
+            List<Resource> resources = Registry.getResourceDAO().findAll();
+            if (resources.size() > maxResources) {
+                return false;
+            }
+        }
+        return true;
+    }
+
 }

libreplan-business/src/main/java/org/libreplan/business/users/daos/IUserDAO.java

@@ -100,4 +100,6 @@ public interface IUserDAO extends IGenericDAO<User, Long>{
      */
     void remove(User user) throws InstanceNotFoundException;
 
+    List<User> findAll();
+
 }

libreplan-business/src/main/java/org/libreplan/business/users/daos/UserDAO.java

@@ -173,4 +173,9 @@ public class UserDAO extends GenericDAOHibernate<User, Long>
         super.remove(user.getId());
     }
 
+    @Override
+    public List<User> findAll() {
+        return list(User.class);
+    }
+
 }

libreplan-business/src/main/java/org/libreplan/business/users/entities/User.java

@@ -24,6 +24,7 @@ package org.libreplan.business.users.entities;
 import static org.libreplan.business.i18n.I18nHelper._;
 
 import java.util.HashSet;
+import java.util.List;
 import java.util.Set;
 
 import org.hibernate.validator.AssertTrue;
@@ -343,4 +344,18 @@ public class User extends BaseEntity implements IHumanIdentifiable{
         return isLibrePlanUser().equals(Boolean.TRUE) ? _("Database")
                 : _("LDAP");
     }
+
+    @AssertTrue(message = "You have exceeded the maximum limit of users")
+    public boolean checkMaxUsers() {
+        Integer maxUsers = Registry.getConfigurationDAO().getConfiguration()
+                .getMaxUsers();
+        if (maxUsers != null && maxUsers > 0) {
+            List<User> users = Registry.getUserDAO().findAll();
+            if (users.size() > maxUsers) {
+                return false;
+            }
+        }
+        return true;
+    }
+
 }

libreplan-business/src/main/resources/db.changelog-1.3.xml

@@ -56,4 +56,21 @@
             referencedTableName="type_of_work_hours" referencedColumnNames="id" />
     </changeSet>
 
+    <changeSet id="add-max_users-and-max_resources-columns-to-configuration"
+        author="mrego">
+        <comment>Add max_users and max_resources columns to configuration</comment>
+        <addColumn tableName="configuration">
+            <column name="max_users" type="INTEGER" />
+        </addColumn>
+        <addColumn tableName="configuration">
+            <column name="max_resources" type="INTEGER" />
+        </addColumn>
+        <update tableName="configuration">
+            <column name="max_users" value="0" />
+        </update>
+        <update tableName="configuration">
+            <column name="max_resources" value="0" />
+        </update>
+    </changeSet>
+
 </databaseChangeLog>

libreplan-business/src/main/resources/org/libreplan/business/common/entities/Configuration.hbm.xml

@@ -88,6 +88,9 @@
             </type>
         </property>
 
+        <property name="maxUsers" column="max_users" />
+        <property name="maxResources" column="max_resources" />
+
         <component name="ldapConfiguration" class="org.libreplan.business.common.entities.LDAPConfiguration">
             <property name="ldapHost" column="ldap_host"/>
             <property name="ldapPort" column="ldap_port"/>