147 lines
3.9 KiB
Go
147 lines
3.9 KiB
Go
package main
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import (
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"crypto/hmac"
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"crypto/sha512"
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"encoding/json"
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"strings"
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"time"
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"github.com/julienschmidt/httprouter"
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)
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func init() {
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router.GET("/api/students/", apiHandler(
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func(httprouter.Params, []byte) (interface{}, error) {
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return getStudents()
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}))
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router.POST("/api/students/", remoteValidatorHandler(apiHandler(createStudent)))
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router.GET("/api/students/:sid/", apiHandler(studentHandler(
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func(std Student, _ []byte) (interface{}, error) {
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return std, nil
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})))
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router.PUT("/api/students/:sid/", remoteValidatorHandler(apiHandler(studentHandler(updateStudent))))
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router.DELETE("/api/students/:sid/", remoteValidatorHandler(apiHandler(studentHandler(
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func(std Student, _ []byte) (interface{}, error) {
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return std.Delete()
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}))))
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}
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type Student struct {
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Id int64 `json:"id"`
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Login string `json:"login"`
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Time time.Time `json:"time"`
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}
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func getStudents() (students []Student, err error) {
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if rows, errr := DBQuery("SELECT id_student, login, time FROM students"); errr != nil {
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return nil, errr
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} else {
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defer rows.Close()
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for rows.Next() {
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var s Student
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if err = rows.Scan(&s.Id, &s.Login, &s.Time); err != nil {
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return
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}
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students = append(students, s)
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}
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if err = rows.Err(); err != nil {
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return
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}
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return
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}
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}
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func getStudent(id int) (s Student, err error) {
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err = DBQueryRow("SELECT id_student, login, time FROM students WHERE id_student=?", id).Scan(&s.Id, &s.Login, &s.Time)
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return
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}
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func getStudentByLogin(login string) (s Student, err error) {
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err = DBQueryRow("SELECT id_student, login, time FROM students WHERE login=?", login).Scan(&s.Id, &s.Login, &s.Time)
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return
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}
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func NewStudent(login string) (Student, error) {
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if res, err := DBExec("INSERT INTO students (login, time) VALUES (?, ?)", login, time.Now()); err != nil {
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return Student{}, err
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} else if sid, err := res.LastInsertId(); err != nil {
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return Student{}, err
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} else {
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return Student{sid, login, time.Now()}, nil
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}
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}
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func (s Student) GetPKey() []byte {
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return hmac.New(sha512.New512_224, []byte(sharedSecret)).Sum([]byte(s.Login))
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}
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func (s Student) Update() (int64, error) {
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if res, err := DBExec("UPDATE students SET login = ?, time = ? WHERE id_student = ?", s.Login, s.Time, s.Id); err != nil {
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return 0, err
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} else if nb, err := res.RowsAffected(); err != nil {
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return 0, err
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} else {
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return nb, err
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}
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}
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func (s Student) Delete() (int64, error) {
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if res, err := DBExec("DELETE FROM students WHERE id_student = ?", s.Id); err != nil {
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return 0, err
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} else if nb, err := res.RowsAffected(); err != nil {
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return 0, err
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} else {
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return nb, err
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}
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}
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func ClearStudents() (int64, error) {
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if res, err := DBExec("DELETE FROM students"); err != nil {
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return 0, err
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} else if nb, err := res.RowsAffected(); err != nil {
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return 0, err
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} else {
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return nb, err
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}
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}
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func createStudent(_ httprouter.Params, body []byte) (interface{}, error) {
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var std Student
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if err := json.Unmarshal(body, &std); err != nil {
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return nil, err
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}
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return NewStudent(strings.TrimSpace(std.Login))
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}
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func updateStudent(current Student, body []byte) (interface{}, error) {
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var new Student
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if err := json.Unmarshal(body, &new); err != nil {
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return nil, err
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}
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current.Login = new.Login
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current.Time = new.Time
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return current.Update()
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}
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type UnlockedChallenge struct {
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Id int64 `json:"id"`
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IdStudent int64 `json:"id_student"`
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Challenge int `json:"challenge"`
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Time time.Time `json:"time"`
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}
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func (s Student) UnlockNewChallenge(challenge int, value string) (UnlockedChallenge, error) {
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if res, err := DBExec("INSERT INTO student_challenges (id_student, challenge, time, value) VALUES (?, ?, ?, ?)", s.Id, challenge, time.Now(), value); err != nil {
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return UnlockedChallenge{}, err
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} else if utid, err := res.LastInsertId(); err != nil {
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return UnlockedChallenge{}, err
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} else {
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return UnlockedChallenge{utid, s.Id, challenge, time.Now()}, err
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}
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}
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