/
session.go
522 lines (479 loc) · 12.5 KB
/
session.go
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package admin
import (
"database/sql"
"encoding/json"
"net/http"
"strconv"
"github.com/OpenCoursePlatform/OpenCoursePlatform-Go/course"
"github.com/OpenCoursePlatform/OpenCoursePlatform-Go/helpers"
"github.com/gorilla/mux"
)
/*
GetSessionBySlugs ...
*/
func GetSessionBySlugs(db *sql.DB, course, module, session string) (string, int, int, error) {
var name string
var sessionType int
var sessionID int
query :=
`
SELECT session.name, session.session_type, session.id
FROM session
INNER JOIN module
ON module.id = session.module_id
INNER JOIN courses
ON courses.id = module.course_id
WHERE courses.slug = ?
AND module.slug = ?
AND session.slug = ?
`
err := db.QueryRow(query, course, module, session).Scan(&name, &sessionType, &sessionID)
if err != nil {
return "", 0, 0, err
}
return name, sessionType, sessionID, nil
}
/*
SessionText ...
*/
type SessionText struct {
Title string
Paths []helpers.Path
Name string
Text string
}
/*
GetSessionText ...
*/
func GetSessionText(db *sql.DB, sessionID int) (string, error) {
var text string
query :=
`
SELECT session_text.text
FROM session_text
WHERE session_text.session_id = ?
`
err := db.QueryRow(query, sessionID).Scan(&text)
if err != nil {
return "", err
}
return text, nil
}
/*
SessionYoutube ...
*/
type SessionYoutube struct {
Title string
Paths []helpers.Path
Name string
Text string
Youtube string
}
/*
SessionMultipleChoice ...
*/
type SessionMultipleChoice struct {
Title string
Paths []helpers.Path
Name string
Questions []course.Question
}
// GetSessionsYoutube ...
func GetSessionsYoutube(db *sql.DB, sessionID int) (string, string, error) {
var pageText string
var youtube string
// Query the database and scan the values into out variables. Don't forget to check for errors.
query := `
SELECT text, youtube_id
FROM session_youtube
WHERE session_id = ?
`
err := db.QueryRow(query, sessionID).Scan(&pageText, &youtube)
if err != nil {
return "", "", err
}
return pageText, youtube, nil
}
/*
HandleSessionText ...
*/
func HandleSessionText(w http.ResponseWriter, r *http.Request, db *sql.DB, name string, sessionID int) {
sessionText, err := GetSessionText(db, sessionID)
if err != nil {
helpers.HandleError(err)
}
p := &SessionText{Title: "Text", Paths: []helpers.Path{{Name: "Admin", Link: "/admin"}}, Name: name, Text: sessionText}
helpers.RenderTemplate(r, w, "admin_session_text", p)
}
/*
HandleSessionYoutube ...
*/
func HandleSessionYoutube(w http.ResponseWriter, r *http.Request, db *sql.DB, name string, sessionID int) {
text, youtube, err := GetSessionsYoutube(db, sessionID)
if err != nil {
helpers.HandleError(err)
}
p := &SessionYoutube{Title: "Text", Paths: []helpers.Path{{Name: "Admin", Link: "/admin"}}, Name: name, Text: text, Youtube: youtube}
helpers.RenderTemplate(r, w, "admin_session_youtube", p)
}
/*
HandleSessionMultipleChoice ...
*/
func HandleSessionMultipleChoice(w http.ResponseWriter, r *http.Request, db *sql.DB, name string, sessionID int) {
questions, err := course.GetSessionsMultipleChoice(db, sessionID)
if err != nil {
helpers.HandleError(err)
}
p := &SessionMultipleChoice{Title: "Multiple Choice", Paths: []helpers.Path{{Name: "Admin", Link: "/admin"}}, Name: name, Questions: questions}
helpers.RenderTemplate(r, w, "admin_session_multiple_choice", p)
}
// Session ...
func Session(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
course := vars["course"]
module := vars["module"]
session := vars["session"]
db, err := helpers.CreateDBHandler()
if err != nil {
helpers.HandleError(err)
}
defer db.Close()
name, sessionType, sessionID, err := GetSessionBySlugs(db, course, module, session)
if err != nil {
helpers.HandleError(err)
}
if sessionType == 1 {
HandleSessionText(w, r, db, name, sessionID)
} else if sessionType == 2 {
HandleSessionYoutube(w, r, db, name, sessionID)
} else if sessionType == 3 {
HandleSessionMultipleChoice(w, r, db, name, sessionID)
}
}
/*
UpdateSessionNameInDB ...
*/
func UpdateSessionNameInDB(db *sql.DB, name string, id int) error {
insForm, err := db.Prepare("UPDATE session SET name=? WHERE id=?")
if err != nil {
return err
}
_, err = insForm.Exec(name, id)
if err != nil {
return err
}
return nil
}
/*
UpdateSessionTextInDB ...
*/
func UpdateSessionTextInDB(db *sql.DB, text string, id int) error {
insForm, err := db.Prepare("UPDATE session_text SET text=? WHERE session_id=?")
if err != nil {
return err
}
_, err = insForm.Exec(text, id)
if err != nil {
return err
}
return nil
}
/*
UpdateSessionYoutubeInDB ...
*/
func UpdateSessionYoutubeInDB(db *sql.DB, text, youtube string, id int) error {
insForm, err := db.Prepare("UPDATE session_youtube SET text=?, youtube_id=? WHERE session_id=?")
if err != nil {
return err
}
_, err = insForm.Exec(text, youtube, id)
if err != nil {
return err
}
return nil
}
// DeleteQuestions ...
func DeleteQuestions(db *sql.DB, sessionID int) error {
rows, err := db.Query(`SELECT id FROM session_multiple_choice WHERE session_id = ?`, sessionID) // check err
if err != nil {
return err
}
defer rows.Close()
var multipleChoiceIDS []int
for rows.Next() {
var multipleChoiceID int
err = rows.Scan(&multipleChoiceID) // check err
if err != nil {
return err
}
multipleChoiceIDS = append(multipleChoiceIDS, multipleChoiceID)
}
for index := range multipleChoiceIDS {
form, err := db.Prepare("DELETE FROM session_multiple_choice_answers WHERE multiple_choice_id = ?")
if err != nil {
return err
}
_, err = form.Exec(multipleChoiceIDS[index])
if err != nil {
return err
}
form, err = db.Prepare("DELETE FROM session_multiple_choice WHERE id = ?")
if err != nil {
return err
}
_, err = form.Exec(multipleChoiceIDS[index])
if err != nil {
return err
}
}
return nil
}
// InsertMultipleChoiceQuestionInDB ...
func InsertMultipleChoiceQuestionInDB(db *sql.DB, questionText string, sessionID int) (int64, error) {
insForm, err := db.Prepare("INSERT INTO session_multiple_choice (question, session_id) VALUES (?, ?)")
if err != nil {
return 0, err
}
res, err := insForm.Exec(questionText, sessionID)
if err != nil {
return 0, err
}
id, err := res.LastInsertId()
if err != nil {
return 0, err
}
return id, nil
}
// InsertMultipleChoiceOptionInDB ...
func InsertMultipleChoiceOptionInDB(db *sql.DB, option course.Option, questionID int64) error {
insForm, err := db.Prepare("INSERT INTO session_multiple_choice_answers (multiple_choice_id, answer, is_correct) VALUES (?, ?, ?)")
if err != nil {
return err
}
_, err = insForm.Exec(questionID, option.Text, option.IsCorrect)
if err != nil {
return err
}
return nil
}
// UpdateMultipleChoiceInDB ...
func UpdateMultipleChoiceInDB(db *sql.DB, questions []course.Question, sessionID int) error {
err := DeleteQuestions(db, sessionID)
if err != nil {
return err
}
for questionIndex := range questions {
questionID, err := InsertMultipleChoiceQuestionInDB(db, questions[questionIndex].Text, sessionID)
if err != nil {
return err
}
for optionIndex := range questions[questionIndex].Options {
err = InsertMultipleChoiceOptionInDB(db, questions[questionIndex].Options[optionIndex], questionID)
if err != nil {
return err
}
}
}
return nil
}
// SessionBody ...
type SessionBody struct {
Name string
Questions []course.Question
}
// UpdateSession ...
func UpdateSession(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
course := vars["course"]
module := vars["module"]
session := vars["session"]
db, err := helpers.CreateDBHandler()
if err != nil {
helpers.HandleError(err)
}
defer db.Close()
_, sessionType, sessionID, err := GetSessionBySlugs(db, course, module, session)
if err != nil {
helpers.HandleError(err)
}
if sessionType == 1 {
newName := r.FormValue("name")
err = UpdateSessionNameInDB(db, newName, sessionID)
if err != nil {
helpers.HandleError(err)
}
newText := r.FormValue("text")
err = UpdateSessionTextInDB(db, newText, sessionID)
if err != nil {
helpers.HandleError(err)
}
} else if sessionType == 2 {
newName := r.FormValue("name")
err = UpdateSessionNameInDB(db, newName, sessionID)
if err != nil {
helpers.HandleError(err)
}
newText := r.FormValue("text")
newYoutube := r.FormValue("youtube")
err = UpdateSessionYoutubeInDB(db, newText, newYoutube, sessionID)
if err != nil {
helpers.HandleError(err)
}
} else if sessionType == 3 {
var sessionBody SessionBody
err := json.NewDecoder(r.Body).Decode(&sessionBody)
if err != nil {
helpers.HandleError(err)
helpers.InternalServerError(w)
return
}
err = UpdateSessionNameInDB(db, sessionBody.Name, sessionID)
if err != nil {
helpers.HandleError(err)
}
err = UpdateMultipleChoiceInDB(db, sessionBody.Questions, sessionID)
if err != nil {
helpers.HandleError(err)
}
}
http.Redirect(w, r, "/admin/courses/"+course+"/"+module+"/"+session, http.StatusSeeOther)
}
// NewSession ...
func NewSession(w http.ResponseWriter, r *http.Request) {
p := &Page{Title: "New session", Paths: []helpers.Path{{Name: "Admin", Link: "/admin"}}}
helpers.RenderTemplate(r, w, "admin_new_session", p)
}
// InsertNewSessionInDB ...
func InsertNewSessionInDB(db *sql.DB, name string, moduleSlug string, sessionType int) (string, int64, error) {
slug := helpers.GenerateSlug(name)
var moduleID int
query :=
`
SELECT module.id
FROM module
WHERE module.slug = ?
`
err := db.QueryRow(query, moduleSlug).Scan(&moduleID)
if err != nil {
return "", 0, err
}
insForm, err := db.Prepare("INSERT INTO session (name, slug, module_id, session_type) VALUES (?, ?, ?, ?)")
if err != nil {
return "", 0, err
}
res, err := insForm.Exec(name, slug, moduleID, sessionType)
if err != nil {
return "", 0, err
}
id, err := res.LastInsertId()
if err != nil {
return "", 0, err
}
return slug, id, nil
}
// InsertNewSessionTextInDB ...
func InsertNewSessionTextInDB(db *sql.DB, sessionID int64, text string) error {
insForm, err := db.Prepare("INSERT INTO session_text (session_id, text) VALUES (?, ?)")
if err != nil {
return err
}
_, err = insForm.Exec(sessionID, text)
if err != nil {
return err
}
return nil
}
// InsertNewSessionYoutubeInDB ...
func InsertNewSessionYoutubeInDB(db *sql.DB, sessionID int64, text, youtube string) error {
insForm, err := db.Prepare("INSERT INTO session_youtube (session_id, text, youtube_id) VALUES (?, ?, ?)")
if err != nil {
return err
}
_, err = insForm.Exec(sessionID, text, youtube)
if err != nil {
return err
}
return nil
}
// InsertNewSession ...
func InsertNewSession(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
course := vars["course"]
module := vars["module"]
name := r.FormValue("name")
sessionTypeString := r.FormValue("session_type")
sessionType, err := strconv.Atoi(sessionTypeString)
if err != nil {
helpers.HandleError(err)
}
db, err := helpers.CreateDBHandler()
if err != nil {
helpers.HandleError(err)
}
defer db.Close()
sessionSlug, sessionID, err := InsertNewSessionInDB(db, name, module, sessionType)
if err != nil {
helpers.HandleError(err)
}
if sessionType == 1 {
text := r.FormValue("text")
err = InsertNewSessionTextInDB(db, sessionID, text)
if err != nil {
helpers.HandleError(err)
}
} else if sessionType == 2 {
text := r.FormValue("text")
youtube := r.FormValue("youtube")
err = InsertNewSessionYoutubeInDB(db, sessionID, text, youtube)
if err != nil {
helpers.HandleError(err)
}
}
http.Redirect(w, r, "/admin/courses/"+course+"/"+module+"/"+sessionSlug, http.StatusSeeOther)
}
// DeleteSessionInDB ...
func DeleteSessionInDB(db *sql.DB, slug string) error {
var sessionID int
err := db.QueryRow(`SELECT id FROM session WHERE slug = ?`, slug).Scan(&sessionID)
if err != nil {
return err
}
form, err := db.Prepare("DELETE FROM session_text WHERE session_id = ?")
if err != nil {
return err
}
_, err = form.Exec(sessionID)
if err != nil {
return err
}
form, err = db.Prepare("DELETE FROM session_youtube WHERE session_id = ?")
if err != nil {
return err
}
_, err = form.Exec(sessionID)
if err != nil {
return err
}
err = DeleteQuestions(db, sessionID)
if err != nil {
return err
}
return nil
}
// DeleteSession ...
func DeleteSession(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
slug := vars["session"]
moduleSlug := vars["module"]
courseSlug := vars["course"]
db, err := helpers.CreateDBHandler()
if err != nil {
helpers.HandleError(err)
}
defer db.Close()
err = DeleteSessionInDB(db, slug)
if err != nil {
helpers.HandleError(err)
}
http.Redirect(w, r, "/admin/courses/"+courseSlug+"/"+moduleSlug, http.StatusSeeOther)
}