~azzar1/unity/add-show-desktop-key

BEGIN;

-- Check that the provided name is sane for use in URLs.

CREATE OR REPLACE FUNCTION valid_url_name(name text) RETURNS boolean AS 

$$

    BEGIN

        RETURN name ~ E'^[a-z0-9][a-z0-9_\+\.\-]*$';

    END;

$$ LANGUAGE 'plpgsql';

-- Just like valid_url_name, except that @ is permitted (so we can use a

-- reasonable subset of email addresses as usernames).

CREATE OR REPLACE FUNCTION valid_login_name(name text) RETURNS boolean AS 

$$

    BEGIN

        RETURN name ~ E'^[a-z0-9][a-z0-9@_\+\.\-]*$';

    END;

$$ LANGUAGE 'plpgsql';

CREATE SEQUENCE login_unixid_seq MINVALUE 1000 MAXVALUE 29999 START WITH 5000;

CREATE TABLE login (

    loginid     SERIAL PRIMARY KEY NOT NULL,

    login       VARCHAR UNIQUE NOT NULL CHECK (valid_login_name(login)),

    passhash    VARCHAR,

    state	VARCHAR NOT NULL CHECK (state in ('no_agreement', 'pending',

                                              'enabled', 'disabled'))

                                 DEFAULT 'no_agreement',

    admin       BOOLEAN NOT NULL DEFAULT false,

    unixid      INT UNIQUE DEFAULT nextval('login_unixid_seq') NOT NULL,

    nick        VARCHAR NOT NULL,

    pass_exp    TIMESTAMP,

    acct_exp    TIMESTAMP,

    last_login  TIMESTAMP,

    svn_pass    VARCHAR,

    email       VARCHAR,

    fullname    VARCHAR NOT NULL,

    studentid   VARCHAR, -- may be null

    settings    VARCHAR

);

-- Subjects

-- --------

CREATE TABLE subject (

    subjectid       SERIAL PRIMARY KEY NOT NULL,

    subj_code       VARCHAR UNIQUE NOT NULL,

    subj_name       VARCHAR NOT NULL,

    subj_short_name VARCHAR UNIQUE NOT NULL CHECK (valid_url_name(subj_short_name))

);

CREATE TABLE semester (

    semesterid  SERIAL PRIMARY KEY NOT NULL,

    year        TEXT NOT NULL CHECK (valid_url_name(year)),

    url_name    TEXT NOT NULL CHECK (valid_url_name(url_name)),

    code        TEXT NOT NULL,

    display_name TEXT NOT NULL,

    state       TEXT NOT NULL CHECK (state IN ('disabled', 'past',

                                    'current', 'future')) DEFAULT 'current',

    UNIQUE (year, url_name),

    UNIQUE (year, code)

);

CREATE TABLE offering (

    offeringid  SERIAL PRIMARY KEY NOT NULL,

    subject     INT4 REFERENCES subject (subjectid) NOT NULL,

    semesterid  INTEGER REFERENCES semester (semesterid) NOT NULL,

    description VARCHAR,

    url         VARCHAR,

    show_worksheet_marks BOOLEAN NOT NULL DEFAULT false,

    worksheet_cutoff TIMESTAMP,

    groups_student_permissions  VARCHAR NOT NULL DEFAULT 'none',

    CHECK (groups_student_permissions in ('none', 'invite', 'create')),

    UNIQUE (subject, semesterid)

);

-- Projects and groups

-- -------------------

CREATE TABLE project_set (

    projectsetid  SERIAL PRIMARY KEY NOT NULL,

    offeringid    INTEGER REFERENCES offering (offeringid) NOT NULL,

    max_students_per_group  INTEGER

);

CREATE TABLE project (

    projectid   SERIAL PRIMARY KEY NOT NULL,

    short_name  TEXT NOT NULL CHECK (valid_url_name(short_name)),

    name        TEXT NOT NULL,

    synopsis    TEXT,

    url         TEXT,

    projectsetid  INTEGER REFERENCES project_set (projectsetid) NOT NULL,

    deadline    TIMESTAMP NOT NULL

);

CREATE OR REPLACE FUNCTION check_project_namespacing_insertupdate()

RETURNS trigger AS '

    DECLARE

        oid INTEGER;

    BEGIN

        IF TG_OP = ''UPDATE'' THEN

            IF NEW.projectsetid = OLD.projectsetid AND NEW.short_name = OLD.short_name THEN

                RETURN NEW;

            END IF;

        END IF;

        SELECT offeringid INTO oid FROM project_set WHERE project_set.projectsetid = NEW.projectsetid;

        PERFORM 1 FROM project, project_set

        WHERE project_set.offeringid = oid AND

              project.projectsetid = project_set.projectsetid AND

              project.short_name = NEW.short_name;

        IF found THEN

            RAISE EXCEPTION ''a project named % already exists in offering ID %'', NEW.short_name, oid;

        END IF;

        RETURN NEW;

    END;

' LANGUAGE 'plpgsql';

CREATE TRIGGER check_project_namespacing

    BEFORE INSERT OR UPDATE ON project

    FOR EACH ROW EXECUTE PROCEDURE check_project_namespacing_insertupdate();

CREATE TABLE project_group (

    groupnm     VARCHAR NOT NULL CHECK (valid_url_name(groupnm)),

    groupid     SERIAL PRIMARY KEY NOT NULL,

    projectsetid  INTEGER REFERENCES project_set (projectsetid) NOT NULL,

    nick        VARCHAR,

    createdby   INT4 REFERENCES login (loginid) NOT NULL,

    epoch       TIMESTAMP NOT NULL,

    UNIQUE (projectsetid, groupnm)

);

CREATE OR REPLACE FUNCTION check_group_namespacing_insertupdate()

RETURNS trigger AS '

    DECLARE

        oid INTEGER;

    BEGIN

        SELECT offeringid INTO oid FROM project_set WHERE project_set.projectsetid = NEW.projectsetid;

        PERFORM 1 FROM project_group, project_set WHERE project_set.offeringid = oid AND project_group.projectsetid = project_set.projectsetid AND project_group.groupnm = NEW.groupnm;

        IF found THEN

            RAISE EXCEPTION ''a project group named % already exists in offering ID %'', NEW.groupnm, oid;

        END IF;

        RETURN NEW;

    END;

' LANGUAGE 'plpgsql';

CREATE TRIGGER check_group_namespacing

    BEFORE INSERT OR UPDATE ON project_group

    FOR EACH ROW EXECUTE PROCEDURE check_group_namespacing_insertupdate();

CREATE TABLE group_invitation (

    loginid     INT4 REFERENCES login (loginid) NOT NULL,

    groupid     INT4 REFERENCES project_group (groupid) NOT NULL,

    inviter     INT4 REFERENCES login (loginid) NOT NULL,

    invited     TIMESTAMP NOT NULL,

    accepted    TIMESTAMP,

    UNIQUE (loginid,groupid)

);

CREATE TABLE group_member (

    loginid     INT4 REFERENCES login (loginid),

    groupid     INT4 REFERENCES project_group (groupid),

    PRIMARY KEY (loginid,groupid)

);

CREATE TABLE enrolment (

    loginid     INT4 REFERENCES login (loginid),

    offeringid  INT4 REFERENCES offering (offeringid),

    role        TEXT NOT NULL CHECK (role IN ('student', 'tutor',

                                              'lecturer')) DEFAULT 'student',

    result      INT,

    special_result VARCHAR,

    supp_result INT,

    special_supp_result VARCHAR,

    notes       VARCHAR,

    active      BOOL NOT NULL DEFAULT true,

    PRIMARY KEY (loginid,offeringid)

);

CREATE TABLE assessed (

    assessedid  SERIAL PRIMARY KEY NOT NULL,

    loginid     INT4 REFERENCES login (loginid),

    groupid     INT4 REFERENCES project_group (groupid),

    projectid   INT4 REFERENCES project (projectid) NOT NULL,

    -- exactly one of loginid and groupid must be non-null

    CHECK ((loginid IS NOT NULL AND groupid IS NULL)

        OR (loginid IS NULL AND groupid IS NOT NULL))

);

-- We must use conditional constraints here -- NULL != NULL.

CREATE UNIQUE INDEX assessed_loginid_key ON assessed(loginid, projectid) WHERE loginid IS NOT NULL;

CREATE UNIQUE INDEX assessed_groupid_key ON assessed(groupid, projectid) WHERE groupid IS NOT NULL;

CREATE TABLE project_extension (

    extensionid SERIAL PRIMARY KEY,

    assessedid  INT4 REFERENCES assessed (assessedid) NOT NULL,

    days        INT NOT NULL,

    approver    INT4 REFERENCES login (loginid) NOT NULL,

    notes       VARCHAR

);

CREATE TABLE project_submission (

    submissionid SERIAL PRIMARY KEY,

    assessedid  INT4 REFERENCES assessed (assessedid) NOT NULL,

    path        VARCHAR NOT NULL,

    revision    INT4 NOT NULL,

    date_submitted TIMESTAMP NOT NULL,

    submitter   INT4 REFERENCES login (loginid) NOT NULL

);

CREATE TABLE project_mark (

    assessedid  INT4 REFERENCES assessed (assessedid) NOT NULL,

    componentid INT4,

    marker      INT4 REFERENCES login (loginid) NOT NULL,

    mark        INT,

    marked      TIMESTAMP,

    feedback    VARCHAR,

    notes       VARCHAR

);

-- Worksheets

-- ----------

CREATE TABLE exercise (

    identifier  TEXT PRIMARY KEY CHECK (valid_url_name(identifier)),

    name        TEXT,

    description TEXT,

    description_xhtml_cache TEXT,

    partial     TEXT,

    solution    TEXT,

    include     TEXT,

    num_rows    INT4

);

CREATE TABLE worksheet (

    worksheetid SERIAL PRIMARY KEY,

    offeringid  INT4 REFERENCES offering (offeringid) NOT NULL,

    identifier  TEXT NOT NULL CHECK (valid_url_name(identifier)),

    name        TEXT NOT NULL,

    data        TEXT NOT NULL,

    data_xhtml_cache TEXT,

    assessable  BOOLEAN NOT NULL,

    published   BOOLEAN NOT NULL DEFAULT true,

    seq_no      INT4 NOT NULL,

    format      TEXT NOT NUll,

    UNIQUE (offeringid, identifier)

);

CREATE TABLE worksheet_exercise (

    ws_ex_id        SERIAL PRIMARY KEY,

    worksheetid     INT4 REFERENCES worksheet (worksheetid) NOT NULL,

    exerciseid      TEXT REFERENCES exercise (identifier) NOT NULL,

    seq_no          INT4 NOT NULL,

    active          BOOLEAN NOT NULL DEFAULT true,

    optional        BOOLEAN NOT NULL,

    UNIQUE (worksheetid, exerciseid)

);

CREATE TABLE exercise_attempt (

    loginid     INT4 REFERENCES login (loginid) NOT NULL,

    ws_ex_id    INT4 REFERENCES worksheet_exercise (ws_ex_id) NOT NULL,

    date        TIMESTAMP NOT NULL,

    attempt     TEXT NOT NULL,

    complete    BOOLEAN NOT NULL,

    active      BOOLEAN NOT NULL DEFAULT true,

    PRIMARY KEY (loginid, ws_ex_id, date)

);

CREATE TABLE exercise_save (

    loginid     INT4 REFERENCES login (loginid) NOT NULL,

    ws_ex_id    INT4 REFERENCES worksheet_exercise (ws_ex_id) NOT NULL,

    date        TIMESTAMP NOT NULL,

    text        TEXT NOT NULL,

    PRIMARY KEY (loginid, ws_ex_id)

);

CREATE TABLE test_suite (

    suiteid     SERIAL PRIMARY KEY,

    exerciseid  TEXT REFERENCES exercise (identifier) NOT NULL,

    description TEXT,

    seq_no      INT4,

    function    TEXT,

    stdin       TEXT

);

CREATE TABLE test_case (

    testid          SERIAL PRIMARY KEY,

    suiteid         INT4 REFERENCES test_suite (suiteid) NOT NULL,

    passmsg         TEXT,

    failmsg         TEXT,

    test_default    TEXT,

    seq_no          INT4

);

CREATE TABLE suite_variable (

    varid       SERIAL PRIMARY KEY,

    suiteid     INT4 REFERENCES test_suite (suiteid) NOT NULL,

    var_name    TEXT,

    var_value   TEXT,

    var_type    TEXT NOT NULL,

    arg_no      INT4

);

CREATE TABLE test_case_part (

    partid          SERIAL PRIMARY KEY,

    testid          INT4 REFERENCES test_case (testid) NOT NULL,

    part_type       TEXT NOT NULL,

    test_type       TEXT,

    data            TEXT,

    filename        TEXT

);

COMMIT;