Upgrade Maven dependencies for Spring 5.2

See merge request arsnova/arsnova-backend!191

javax.* dependencies have been replaced with the jakarta.* equivalents.
No code changes were necessary for the upgrade.

Use DefaultEntityServiceImpl for most UserProfile operations

See merge request arsnova/arsnova-backend!189

Some account operations needs to be run without a fully authenticated
user so the service directly accessed the repository. A run-as role is
now set to allow the use of the default implementation.

With this change, events are now published for CRUD operations on
UserProfiles and issues with caching should be fixed.

Handle all authentication exceptions

See merge request arsnova/arsnova-backend!190

Previously, some `AuthenticationException`s were not handled, so the API
responded with status code 500 instead of 401.

Remove Apache Directory Server

Closes #61

See merge request arsnova/arsnova-backend!188

It causes dependency conflicts with OpenSAML and isn't used anymore.

Refs arsnova-backend!171.
Fixes arsnova-backend#61.

Add more fine-grained authorization handling for management API

See merge request arsnova/arsnova-backend!187

Daniel Gerhardt authored Oct 09, 2019 and Tom Käsler committed Oct 09, 2019

* Everyone can access /health (w/o details) and /info.
* Role `MONITORING` can access:
    * /health/** (w/ component details)
    * /metrics[/**]
    * /prometheus
    * /stats
* Role `ADMIN` can access everything.

Only use Spring's auto configuration for Actuator

Closes #57

See merge request arsnova/arsnova-backend!186

Daniel Gerhardt authored Oct 09, 2019 and Tom Käsler committed Oct 09, 2019

An `AutoConfigurationImportFilter` has been implemented to filter auto
configuration classes by package name. Only classes needed for Actuator
are selected.

With this change Spring does no longer create beans for services that
are disabled. This solves problems with Actuator's health endpoint
reporting "DOWN" for those services.

An LdapTemplate bean is conditionally registered which was previously
handled by auto configuration.

Fixes #57.

Add config property for LDAP connect timeout

See merge request arsnova/arsnova-backend!185

Add entity HTTP headers for moderator endpoints

Closes #60

See merge request arsnova/arsnova-backend!184

Daniel Gerhardt authored Oct 09, 2019 and Tom Käsler committed Oct 09, 2019

The Room entity's ID and new revision are now sent with the response to
moderator updates. This allows clients to update their cached entity
instead of requesting the full entity again.

Implements arsnova-backend#60.

Keep moderators when a full room update is done

Closes #59

See merge request arsnova/arsnova-backend!183

Fixes arsnova-backend#59.

Fix startup w/o migrate-from property

Closes #56

See merge request arsnova/arsnova-backend!182

Startup failed when `system.couchdb.migrate-from` was not set. This was
a regression introduced by !174.

Fixes #56.

Gridimage content format

See merge request arsnova/arsnova-backend!180

Answers for `GridImageContents` are stored as `ChoiceAnswer`s.

The model of grid image contents has been overhauled to store data more
efficient. Fields are now represented as a single index int value
instead of a semicolon separated String. Instead of storing all
selectable fields now only the correct ones are stored.

Further changes:
* Field size instead of scale factor and zoom level for grid
* Normalized values for offsets and field size
* A single scale factor value for the image
* Rotation in degrees
* Removed coloring settings

Fix NullPointerException caused by AnswerStatistics

See merge request arsnova/arsnova-backend!181

A NullPointerException was caused by RoundStatistics with uninitilized
lists.

Continue aborted migrations with help of saved state

See merge request arsnova/arsnova-backend!179

The error message includes the list index so it is easier to find the
document causing the problem.

Migrations can now be split into smaller steps. This change and
additional stored migration state data allow aborted migrations to be
continued.

Add update support to content group endpoint

See merge request arsnova/arsnova-backend!177

Content groups can be updated by sending the updated entity via PUT
request to the /room/{roomId}/contentgroup/{groupName} endpoint.

Fix HTTP connection leak by database index creation

See merge request arsnova/arsnova-backend!178

Fix NoSuchElementException in group stats endpoint

See merge request arsnova/arsnova-backend!176

A NoSuchElementException was thrown when the stats endpoint was
requested for a room w/o any content groups.

Fix NPE in migration of text content format

See merge request arsnova/arsnova-backend!175

Fixes a regression introduced by arsnova/arsnova-backend!174.

Improve migrations

See merge request arsnova/arsnova-backend!174

The solution text is no longer preferred over the hint text if it is an
empty String.

Migrations are once again enabled if `migrate-from` property is set.
Code has been refactored to use `@ConditionalOnProperty` instead of a
custom implementation for `@Conditional`.