token-validator: start project

token-validator/students.go

@@ -0,0 +1,99 @@
+package main
+
+import (
+	"encoding/json"
+	"strings"
+	"time"
+
+	"github.com/julienschmidt/httprouter"
+)
+
+func init() {
+	router.GET("/api/students/", apiHandler(
+		func(httprouter.Params,[]byte) (interface{}, error) {
+			return getStudents() }))
+	router.POST("/api/students/", apiHandler(createStudent))
+}
+
+
+type Student struct {
+	Id    int64     `json:"id"`
+	Login string    `json:"login"`
+	Time  time.Time `json:"time"`
+}
+
+func getStudents() (students []Student, err error) {
+	if rows, errr := DBQuery("SELECT id_student, login, time FROM students"); errr != nil {
+		return nil, errr
+	} else {
+		defer rows.Close()
+
+		for rows.Next() {
+			var s Student
+			if err = rows.Scan(&s.Id, &s.Login, &s.Time); err != nil {
+				return
+			}
+			students = append(students, s)
+		}
+		if err = rows.Err(); err != nil {
+			return
+		}
+
+		return
+	}
+}
+
+func getStudent(id int64) (s Student, err error) {
+	err = DBQueryRow("SELECT id_student, login, time FROM students WHERE id_student=?", id).Scan(&s.Id, &s.Login, &s.Time)
+	return
+}
+
+func NewStudent(login string) (Student, error) {
+	if res, err := DBExec("INSERT INTO students (login, time) VALUES (?, ?)", login, time.Now()); err != nil {
+		return Student{}, err
+	} else if sid, err := res.LastInsertId(); err != nil {
+		return Student{}, err
+	} else {
+		return Student{sid, login, time.Now()}, nil
+	}
+}
+
+func (s Student) Update() (int64, error) {
+	if res, err := DBExec("UPDATE students SET login = ?, time = ? WHERE id_student = ?", s.Login, s.Time, s.Id); err != nil {
+		return 0, err
+	} else if nb, err := res.RowsAffected(); err != nil {
+		return 0, err
+	} else {
+		return nb, err
+	}
+}
+
+func (s Student) Delete() (int64, error) {
+	if res, err := DBExec("DELETE FROM students WHERE id_student = ?", s.Id); err != nil {
+		return 0, err
+	} else if nb, err := res.RowsAffected(); err != nil {
+		return 0, err
+	} else {
+		return nb, err
+	}
+}
+
+func ClearStudents() (int64, error) {
+	if res, err := DBExec("DELETE FROM students"); err != nil {
+		return 0, err
+	} else if nb, err := res.RowsAffected(); err != nil {
+		return 0, err
+	} else {
+		return nb, err
+	}
+}
+
+
+func createStudent(_ httprouter.Params, body []byte) (interface{}, error) {
+	var std Student
+	if err := json.Unmarshal(body, &std); err != nil {
+		return nil, err
+	}
+
+	return NewStudent(strings.TrimSpace(std.Login))
+}