feat(db): add student class

- merge all migration files in one file

Closes #87
Closes #88
Closes #89
Closes #91

db/migrations/v1_init.sql

@@ -41,4 +41,144 @@ CREATE TABLE quiz_question_answer
 
     FOREIGN KEY (question_sha1) REFERENCES quiz_question (sha1),
     FOREIGN KEY (answer_sha1) REFERENCES quiz_answer (sha1)
+);
+
+CREATE TABLE role
+(
+    id   INTEGER PRIMARY KEY,
+    name TEXT NOT NULL
+);
+
+INSERT INTO role (id, name)
+VALUES (1, 'Admin');
+INSERT INTO role (id, name)
+VALUES (2, 'Teacher');
+INSERT INTO role (id, name)
+VALUES (3, 'Student');
+
+CREATE TABLE student_class
+(
+    uuid TEXT PRIMARY KEY,
+    name TEXT NOT NULL
+);
+
+CREATE TABLE user
+(
+    id         TEXT PRIMARY KEY,
+    email      TEXT    NOT NULL,
+    firstname  TEXT    NOT NULL,
+    lastname   TEXT    NOT NULL,
+    active     INTEGER NOT NULL DEFAULT 1,
+    role_id    INTEGER NOT NULL,
+    class_uuid TEXT,
+
+    FOREIGN KEY (role_id) REFERENCES role (id),
+    FOREIGN KEY (class_uuid) REFERENCES student_class (uuid) ON DELETE SET NULL
+);
+
+CREATE TABLE session
+(
+    uuid       TEXT PRIMARY KEY,
+    quiz_sha1  TEXT      NOT NULL,
+    user_id    TEXT      NOT NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    UNIQUE (quiz_sha1, user_id),
+    FOREIGN KEY (quiz_sha1) REFERENCES quiz (sha1),
+    FOREIGN KEY (user_id) REFERENCES user (id)
+);
+
+CREATE TABLE session_answer
+(
+    session_uuid  TEXT    NOT NULL,
+    user_id       TEXT    NOT NULL,
+    question_sha1 TEXT    NOT NULL,
+    answer_sha1   TEXT    NOT NULL,
+    checked       INTEGER NOT NULL,
+
+    PRIMARY KEY (session_uuid, question_sha1, answer_sha1),
+    FOREIGN KEY (session_uuid) REFERENCES session (uuid),
+    FOREIGN KEY (user_id) REFERENCES user (id),
+    FOREIGN KEY (question_sha1) REFERENCES quiz_question (sha1),
+    FOREIGN KEY (answer_sha1) REFERENCES quiz_answer (sha1)
+);
+
+CREATE VIEW quiz_answer_count_view
+AS
+SELECT q.sha1          AS quiz_sha1,
+       COUNT(qa.valid) AS checked_answers
+FROM quiz q
+         JOIN quiz_question_quiz qqq ON q.sha1 = qqq.quiz_sha1
+         JOIN quiz_question_answer qqa ON qqq.question_sha1 = qqa.question_sha1
+         JOIN quiz_answer qa ON qa.sha1 = qqa.answer_sha1
+GROUP BY q.sha1;
+
+CREATE VIEW session_response_view
+AS
+SELECT qqq.quiz_sha1,
+       qqq.question_sha1,
+       qqa.answer_sha1,
+       s.uuid  AS session_uuid,
+       s.user_id,
+       sa.checked,
+       CASE
+           WHEN checked IS NOT NULL
+               THEN CASE
+                        WHEN qa.valid == sa.checked
+                            THEN 1
+                        ELSE 0
+               END
+           END AS result
+FROM quiz_question_quiz qqq
+         JOIN quiz_question_answer qqa ON qqq.question_sha1 = qqa.question_sha1
+         JOIN quiz_answer qa ON qa.sha1 = qqa.answer_sha1
+         LEFT JOIN session s ON qqq.quiz_sha1 = s.quiz_sha1
+         LEFT JOIN session_answer sa ON qa.sha1 = sa.answer_sha1 AND sa.question_sha1 = qqq.question_sha1 AND
+                                        sa.answer_sha1 = qqa.answer_sha1;
+
+CREATE VIEW session_view
+AS
+SELECT s.uuid                                                                                       AS uuid,
+       q.sha1                                                                                       AS quiz_sha1,
+       q.name                                                                                       AS quiz_name,
+       q.active                                                                                     AS quiz_active,
+       u.id                                                                                         AS user_id,
+       CAST(u.firstname || ' ' || u.lastname AS TEXT)                                               AS user_name,
+       CAST(MAX(q.duration - (STRFTIME('%s', 'now') - STRFTIME('%s', s.created_at)), 0) AS INTEGER) AS remaining_sec,
+       checked_answers,
+       SUM(srv.result)                                                                              AS results
+FROM session s
+         JOIN quiz q ON q.sha1 = s.quiz_sha1
+         JOIN user u ON u.id = s.user_id
+         JOIN quiz_answer_count_view qacv ON s.quiz_sha1 = qacv.quiz_sha1
+         JOIN session_response_view srv ON s.uuid = srv.session_uuid;
+
+CREATE TRIGGER verify_remaining_time_create
+    BEFORE INSERT
+    ON session_answer
+BEGIN
+    SELECT CASE
+               WHEN (SELECT remaining_sec FROM session_view sv WHERE sv.uuid = new.session_uuid) = 0 THEN
+                   RAISE(ABORT, 'session is over')
+               END;
+END;
+
+CREATE TRIGGER verify_remaining_time_update
+    BEFORE UPDATE
+    ON session_answer
+BEGIN
+    SELECT CASE
+               WHEN (SELECT remaining_sec FROM session_view sv WHERE sv.uuid = new.session_uuid) = 0 THEN
+                   RAISE(ABORT, 'session is over')
+               END;
+END;
+
+CREATE TABLE quiz_class_visibility
+(
+    class_uuid TEXT NOT NULL,
+    quiz_sha1  TEXT NOT NULL,
+
+    PRIMARY KEY (class_uuid, quiz_sha1),
+    FOREIGN KEY (class_uuid) REFERENCES student_class (uuid) ON DELETE CASCADE,
+    FOREIGN KEY (quiz_sha1) REFERENCES quiz (sha1)
 );

db/queries/quiz.sql

@@ -49,6 +49,30 @@ FROM quiz q
          JOIN quiz_answer qa ON qa.sha1 = qqa.answer_sha1
 WHERE q.sha1 = ?;
 
+-- name: FindQuizFullBySha1RestrictedToClass :many
+SELECT q.sha1       AS quiz_sha1,
+       q.filename   AS quiz_filename,
+       q.name       AS quiz_name,
+       q.version    AS quiz_version,
+       q.created_at AS quiz_created_at,
+       q.duration   AS quiz_duration,
+       q.active     AS quiz_active,
+       qq.sha1      AS question_sha1,
+       qq.content   AS question_content,
+       qa.sha1      AS answer_sha1,
+       qa.content   AS answer_content,
+       qa.valid     AS answer_valid
+FROM quiz q
+         JOIN quiz_question_quiz qqq ON q.sha1 = qqq.quiz_sha1
+         JOIN quiz_question qq ON qq.sha1 = qqq.question_sha1
+         JOIN quiz_question_answer qqa ON qq.sha1 = qqa.question_sha1
+         JOIN quiz_answer qa ON qa.sha1 = qqa.answer_sha1
+         JOIN quiz_class_visibility qcv ON q.sha1 = qcv.quiz_sha1
+         JOIN student_class sc ON sc.uuid = qcv.class_uuid
+         JOIN user u ON sc.uuid = u.class_uuid
+WHERE q.sha1 = ?
+  AND u.id = ?;
+
 -- name: FindQuizByFilenameAndLatestVersion :one
 SELECT *
 FROM quiz
@@ -62,6 +86,16 @@ FROM quiz
 WHERE active = 1
 LIMIT ? OFFSET ?;
 
+-- name: FindAllActiveQuizRestrictedToClass :many
+SELECT *
+FROM quiz q
+         JOIN quiz_class_visibility qcv ON q.sha1 = qcv.quiz_sha1
+         JOIN student_class sc ON sc.uuid = qcv.class_uuid
+         JOIN user u ON sc.uuid = u.class_uuid
+WHERE q.active = 1
+  AND u.id = ?
+LIMIT ? OFFSET ?;
+
 -- name: CountAllActiveQuiz :one
 SELECT COUNT(1)
 FROM quiz

db/queries/student_class.sql

@@ -0,0 +1,28 @@
+-- name: CreateOrReplaceClass :exec
+REPLACE INTO student_class (uuid, name)
+VALUES (?, ?);
+
+-- name: FindAllClasses :many
+SELECT *
+FROM student_class
+LIMIT ? OFFSET ?;
+
+-- name: DeleteClassById :exec
+DELETE
+FROM student_class
+WHERE uuid = ?;
+
+-- name: AssignUserToClass :exec
+UPDATE user
+SET class_uuid = ?
+WHERE id = ?;
+
+-- name: CreateQuizClassVisibility :exec
+REPLACE INTO quiz_class_visibility (class_uuid, quiz_sha1)
+VALUES (?, ?);
+
+-- name: DeleteQuizClassVisibility :exec
+DELETE
+FROM quiz_class_visibility
+WHERE class_uuid = ?
+  AND quiz_sha1 = ?;