# Database Used database schema is generated by ORM framework Doctrine from ReCodEx API source code. Tables are directly mapped to _entities_, which are PHP classes annotated with data provided by ORM framework. In the following text there is a brief description of each such entity. There may be some additional database tables for many-to-many relations between entities, but these tables are not discussed in detail because there are only two columns with keys of both related tables in each one. Graphical database schema is added as attachement to this documentation. ## Assignment Assignment table represents exercise assignment in a group. It holds keys of the exercise (_exerciseId_) and group (_groupId_) where is the exercise assigned. Other columns are: - _isPublic_ -- assignment can be public (visible to students) or private (visible only to supervisor of the group) - _submissionCountLimit_ -- number of attempts student can make to solve the exercise - _scoreConfig_ -- configuration for calculating point score; actual syntax depends on used score calculator - _firstDeadline_ -- date and time after that no new submissions are received - _allowSecondDeadline_, _secondDeadline_ -- flag if another deadline is allowed, date and time of that deadline - _maxPointsBeforeFirstDeadline_, _maxPointsBeforeSecondDedline_ -- maximal amount of points for correct solutions for first (respectively second) deadline - _scoreCalculator_ -- name of used score score calculator or NULL for API's default one - _canViewLimitRatios_ -- flag if student can view percentage of used time and memory limits for each test - _deletedAt_ -- assignment cannot be deleted due to possible numerous dependencies, but can be hidden from the users; published assignments have NULL value, deleted ones have time of deletion ## Comment Comment entity holds one message published in arbitrary comment thread. - _commentThread_, _user_ -- keys of thread where this comment belongs and author of the comment - _isPrivate_ -- flag if the comment is for author only or public - _postedAt_ -- date and time of comment post - _text_ -- actual text of the comment ## CommentThread CommentThread entity contains all comments in one thread by one-to-many relation. From database perspective, this table has only one column with primary key and the relation is made by foreign key column in Comment table. ## Exercise Exercise is a structure describing one problem. Exercises can have tree structure (_exerciseId_ of parent), but now it is not used. - _author_ -- key for user entity of the author - _name_ -- name of the exercise - _version_ -- version of the exercise; each edit increses this counter - _createdAt_ -- date and time of creation - _updatedAt_ -- date and time of last modification - _difficulty_ -- description of difficulty, curretly used ones are easy, medium and hard - _isPublic_ -- flag if the exercise is publicly visible to all supervisors or only to author ## ExerciseFile ExerciseFile entity is extension of UploadedFile entity, so they share one database table. Exercise file has some additional data: - _hashName_ -- `sha1sum` of file content, used as name in job configurations - _fileServerPath_ -- URL where the file is stored on file server - _exerciseId_ -- key of exercise this supplementary file belongs to ## ExternalLogin ExternalLogin entity provides mapping between username in external login service and local user account. - _user_ -- key to local user entity - _authService_ -- identifier which extrnal service is the user using - _externalId_ -- username in that particular external instance ## ForgottenPassword This entity is used for logging requests about password resets. - _user_ -- key to user who requested the password change (or NULL if not known) - _requestedAt_ -- date and time of password reset request - _sentTo_ -- email address where the reset token was sent to - _redirectUrl_ -- URL where the user is supposed to change his password - _IPaddress_ -- IP address from where the request came from (parsed from HTTP request header) ## Group Group entity contains data about a group. They can be hierarchical, reference to the parent is obtained by _parentGroup_ key. Top level groups has this field set to NULL. Each group belongs to one instance referenced by _instance_ key. Also, each group has its administrator user referenced by _admin_ key. Other data: - _name_ -- name of the group - _description_ -- Markdown styled text description of the group - _threshold_ -- percentage of maximal points required to complete the course in float between 0 and 1 (or NULL) - _publicStats_ -- flag if user can view total number of points for other users in the group - _isPublic_ -- flag if the group is visible for all students in instance or it is hidden (only for members) - _externalId_ -- external identifier of the group (or NULL), for example course code like NPRG042 ## GroupMembership GroupMembership represents relation between group and its members. Also it contains additional data, so this entity is not autogenerated by Doctrine. Essential parts are keys to user and group entities (_user_ and _group_ keys). Additional data: - _status_ -- user status in the group, one of _requested_, _accepted_ and _rejected_ - _type_ -- type of user access, one of _student_, _supervisor_ and _*_ for all - _requestedAt_ -- date and time the join request was received (or NULL) - _joindedAt_ -- date and time the request for joining was accepted (or NULL) - _rejectedAt_ -- date and time the request for joining was rejected (or NULL) - _studentSince_ -- date and time when the user became a student, usually time of registration (or NULL) - _supervisorSince_ -- date and time when the user became a supervisor (or NULL) ## HardwareGroup HardwareGroup entity represents used hardware groups by the backend. Now this table has to be changed manually when a new hardware group is added, but it is possible to automate this in the future. The hardware group has only one column with data, the textual _description_. ## HardwareGroupAvailabilityLog This entity provides information about hardware group changes during time. System administrator should keep the data up-to-date with backend state. - _hardwareGroup_ -- key to HardwareGroup entity - _isAvailable_ -- flag if the hardware group becomes available or disabled - _loggedAt_ -- date and time of the change - _description_ -- reason for the change ## Instance Instance entity represents separation of multiple organisations using the same API server. Each group or user belong to exactly one instance. User permissions are only valid in his instance. - _admin_ -- key referencing administrator user entity - _description_ -- Markdown styled textual description - _isOpen_ -- flag if new user can register themselves in this instance - _isAllowed_ -- flag if the instance cen be used or is disabled for all users - _createdAt_ -- date and time of instance creation - _updatedAt_ -- date and time of last modification - _needsLicence_ -- flag if this instance needs a velid license - _deletedAt_ -- instance cannot be directly deleted due to possibility of many dependencies, but instead it can be hidden from users by setting this field to date and time of deletion (active instances have NULL value) ## Licence Licence entity gives validity to instance. For normal usage an instance needs valid licence for proper functionality. - _instance_ -- instance key the licence is bound to - _isValid_ -- flag if this licence is valid or blocked by administrator - _validUntil_ -- date and time until the licence is valid (expiration time) - _note_ -- optional note about the licence ## LocalizedAssignment LocalizedAssignment entity represent text or description of the problem in one language mutation. Exercises and assignments uses these text to display problem description to users. The text can be Markdown styled. - _name_ -- title of this localized assignment - _locale_ -- language code of locale this text is written in (for example _en_) - _description_ -- actual text - _localizedAssignment_ -- key refering to parent localized assignment; when editing, new version is created as a child of the original one - _createdAt_ -- date and time of creation ## Login Login entity holds credentials for logging into ReCodEx system using internal authentication. - _user_ -- key refering to user entity - _username_ -- mail of the user - _passwordHash_ -- hashed password, generated by Nette [Passwords::hash()](https://api.nette.org/2.3/source-Security.Passwords.php.html#27) method ## Permission Permission entity holds permissions for user roles. API endpoints can have a permission restriction assigned by annotation _@UserIsAllowed(exercises="view-all")_ which are checked before endpoint invocation. These permission are gained to user roles in this entity. - _role_ -- key of the role this permission is assigned to - _resource_ -- resource name, usually same for all endpoints in one presenter; from the example above resource is _exercises_ string - _action_ -- action, usually different for each endpoint, wildcard can be specified as _*_; from example above action is _view-all_ string - _isAllowed_ -- flag if the rule is allowed of denied ## ReferenceExerciseSolution ReferenceExerciseSolution contains additional data for reference solution than normal solution created by student submit. - _exercise_, _solution_ -- keys refering to exercise this entity is bound to and solution entity used for submitting - _uploadedAt_ -- date and time of creation - _description_ -- textual description of used algorithm or other note about the particular solution ## ReferenceSolutionEvaluation - _referenceSolution_ -- solution to which this evaluation belongs to - _hwGroup_ -- hardware group which was used during execution on worker - _resultsUrl_ -- filserver address from which results of reference evaluation can be internally accessed - _evaluation_ -- associated general evaluation ## ReportedErrors All errors which were reported to api from backend are sent to administrator of system and also stored in this table. - _type_ -- textual description of error type - _recipients_ -- list of email addresses to which error was sent - _subject_ -- subject as it was sent in email - _sentAt_ -- datetime when email with error report was sent - _description_ -- message as it was sent in email ## Resource - _id_ -- textual identification of resource - _permissions_ -- permissions associated with this resource ## Role Roles serves for distinction of what user can do or cannot do. Thus every user has to have assigned some particular role from which decisions about access rights are made. - _id_ -- role textual identification - _parentRole_ -- reference to parent role - _childRoles_ -- array of roles which have this one as parent - _permissions_ -- permissions which are connected to this role ## RuntimeEnvironment Stores information about supported environments which can be used for evaluation on workers. - _name_ -- human readable name of runtime environment - _language_ -- language which can be used in this environment - _extensions_ -- list of extensions in yaml format - _platform_ -- textual description of platform - _description_ -- some further description concerning this environment ## Solution - _user_ -- user to whom this solution belongs to - _files_ -- exercise solution files which user uploaded and are associated with solution - _solutionRuntimeConfig_ -- runtime configuration which was used during execution on worker - _evaluated_ -- true if solution was evaluated and results were processed ## SolutionEvaluation - _evaluatedAt_ -- datetime of evaluation creation - _initFailed_ -- if true then one of the initiation tasks failed thus solution cannot be even compiled - _score_ -- overall score of user solution - _points_ -- points which were assigned to user for this solution - _bonusPoints_ -- bonus points assigned by some of the supervisors - _isValid_ -- can be used to ban user solution of exercise due to various reasons - _evaluationFailed_ -- true if whole evaluation failed on worker - _resultYml_ -- whole YAML file with evaluation results acquired indirectly from worker - _testResults_ -- results of all tests associated with user solution ## SolutionFile Parent of this entity is `UploadedFile`, only added field is solution to which this file is associated. - _solution_ -- associated solution to which file belongs to ## SolutionRuntimeConfig - _name_ -- human readable identificator of runtime configuration - _runtimeEnvironment_ -- corresponding runtime environment - _jobConfigFilePath_ -- path to job configuration which is stored at api server - _createdAt_ -- datetime of entity creation - _createdFrom_ -- parent solution runtime configuration from which this one was created ## Submission - _submittedAt_ -- datetime of submission creation - _note_ -- user can provide note to his/hers exercise solution - _resultsUrl_ -- URL pointed to fileserver from which results of submission can be internally downloaded - _assignment_ -- corresponding assignment to which submission belongs to - _user_ -- user to whom submission belongs to - _submittedBy_ -- user who submitted solution of exercise, can be supervisor for instance - _solution_ -- corresponding solution - _asynchronous_ -- exercise solution was submitted asynchronously, this happens when supervisor or superadmin submit solution for particular user - _evaluation_ -- evaluation of this submission ## SubmissionFailure Logically queue of failed submissions which deserves further attention from administrator. Administrator can then resolve this issue and information about that will be stored too. - _type_ -- type of failure, can be for example _broker_reject_ or _evaluation_failure_ - _description_ -- description of failure which was provided by backend - _submission_ -- associated submission which failed - _createdAt_ -- datetime of entity creation - _resolvedAt_ -- datetime when failure was resolved - _resolutionNote_ -- user can provide description when failure is resolved ## TestResult Represents result of one logical test from job configuration. - _testName_ -- name of test which was stated in job configuration - _status_ -- overall status of test - _solutionEvaluation_ -- evaluation to which test result belongs - _score_ -- score which was assigned to test evaluation by judge - _memoryExceeded_ -- true if memory limit was exceeded - _usedMemoryRatio_ -- float number from 0.0 to 1.0 which represents percentage of user solution memory usage against memory limit from configuration - _timeExceeded_ -- true if time limit was exceeded - _usedTimeRatio_ -- float number from 0.0 to 1.0 which represents percentage of user solution time usage against time limit from configuration - _exitCode_ -- exit code which whole test returns - _message_ -- provided only on non-zero exit code - _stats_ -- textual representation of whole information about evaluation of test which arrived from worker - _judgeOutput_ -- output textual message from judge ## UploadedFile Entity which represents one file which was uploaded to api server. This entity uses _Single Table Inheritance_ and its children are `ExerciseFile` and `SolutionFile` entities. - _name_ -- original name of file uploaded to api - _localFilePath_ -- destination where file is stored on api server - _uploadedAt_ -- datetime of file upload - _fileSize_ -- size of uploaded file in bytes - _user_ -- user which uploaded particular file ## User Keeps information about all users which are registered in ReCodEx. - _degreesBeforeName_ -- degrees before name which user acquired - _firstName_ -- first name - _lastName_ -- surname - _degreesAfterName_ -- degrees after name - _email_ -- email address which is used for sending email notifications - _avatarUrl_ -- url of profile picture - _isVerified_ -- user verified his/hers email address (not used at the moment) - _isAllowed_ -- if this field is set to false user cannot sign in to application - _createdAt_ -- datetime of user registration - _instance_ -- instance to which user belongs to - _settings_ -- settings which are connected to this user - _memberships_ -- array of groups in which is user assigned - _exercises_ -- exercises which user created and is their author - _role_ -- role of the user which is used to determine privileges ## UserAction Stores information about what routes on api user visited and some additional information about it. This datas should be collected only from logged users. - _user_ -- which user performed api request - _loggedAt_ -- time when action was performed - _action_ -- action which was requested on api - _params_ -- GET or POST parameters given by user - _code_ -- return code which was sent back by api - _data_ -- if call ended up with an exception, description of thrown exception should be there ## UserSettings User settings belong to some particular user and contains settings mostly for web application. - _darkTheme_ -- dark mode will be used in text editor in web application - _vimMode_ -- turn vim mode on in text editor used by web application - _defaultLanguage_ -- default language which will be used in web application