Added documentation

README.md

@@ -14,6 +14,13 @@
 - Guided walkthrough
 - Audio annotations and TTS (Text-to-Speech)
 
+## External Links
+This project is hosted on a VPS, deployed and running via Docker containers. Source code is hosted on GitHub, and static code analysis is run by SonarCloud to ensure code maintainability.
+- [Fableous](https://fableous.daystram.com)
+- [GitHub](https://github.com/deco-finter/fableous)
+- [DockerHub](https://hub.docker.com/r/daystram/fableous)
+- [SonarCloud](https://sonarcloud.io/project/overview?id=deco-finter_fableous)
+
 ## Service
 
 The application is divided into two parts:

fableous-be/config/config.go

@@ -6,16 +6,20 @@ import (
 	"github.com/spf13/viper"
 )
 
+// AppConfig is a global reference to the application config.
 var AppConfig Config
 
+// Config is the base application configuration struct.
 type Config struct {
 	Version     string
 	Port        int
 	Environment string
 	Debug       bool
 
+	// Directory to store static gallery files
 	StaticDir string
 
+	// PostgreSQL database configuration
 	DBHost     string
 	DBPort     int
 	DBDatabase string
@@ -25,6 +29,7 @@ type Config struct {
 	JWTSecret string
 }
 
+// InitializeAppConfig loads AppConfig from environment variables.
 func InitializeAppConfig() {
 	viper.SetConfigName(".env") // allow directly reading from .env file
 	viper.SetConfigType("env")

fableous-be/constants/auth.go

@@ -5,5 +5,6 @@ import (
 )
 
 const (
+	// AuthenticationTimeout is the expiry duration for issued JWT tokens.
 	AuthenticationTimeout = time.Hour * 24 * 2
 )

fableous-be/constants/classroom.go

@@ -1,5 +1,6 @@
 package constants
 
 const (
+	// ClassroomTokenLength is the length of the session token.
 	ClassroomTokenLength = 4
 )

fableous-be/constants/router.go

@@ -1,6 +1,10 @@
 package constants
 
 const (
+	// RouterKeyIsAuthenticated is the key for the request authentication status injected by the auth middleware.
 	RouterKeyIsAuthenticated = "is_authenticated"
-	RouterKeyUserID          = "user_id"
+
+	// RouterKeyUserID is the key for the requesting userID injected by the auth middleware.
+	// Empty if the request is not authenticated.
+	RouterKeyUserID = "user_id"
 )

fableous-be/controllers/auth.go

@@ -10,6 +10,7 @@ import (
 	"github.com/deco-finter/fableous/fableous-be/handlers"
 )
 
+// POSTLogin handles login request.
 func POSTLogin(c *gin.Context) {
 	var err error
 	var user datatransfers.UserLogin
@@ -26,6 +27,7 @@ func POSTLogin(c *gin.Context) {
 	c.JSON(http.StatusOK, datatransfers.Response{})
 }
 
+// POSTRegister handles register request.
 func POSTRegister(c *gin.Context) {
 	var err error
 	var user datatransfers.UserSignup

fableous-be/controllers/classroom.go

@@ -10,28 +10,31 @@ import (
 	"github.com/deco-finter/fableous/fableous-be/handlers"
 )
 
-func GETClassroom(c *gin.Context) {
+// GETClassroomList handles classroom list request.
+func GETClassroomList(c *gin.Context) {
 	var err error
-	var classroomInfo datatransfers.ClassroomInfo
-	classroomInfo.ID = c.Param("classroom_id")
-	if classroomInfo, err = handlers.Handler.ClassroomGetOneByID(classroomInfo.ID); err != nil {
+	var classroomInfos []datatransfers.ClassroomInfo
+	userID := c.GetString(constants.RouterKeyUserID)
+	if classroomInfos, err = handlers.Handler.ClassroomGetAllByUserID(userID); err != nil {
 		c.JSON(http.StatusNotFound, datatransfers.Response{Error: "cannot find classroom"})
 		return
 	}
-	c.JSON(http.StatusOK, datatransfers.Response{Data: classroomInfo})
+	c.JSON(http.StatusOK, datatransfers.Response{Data: classroomInfos})
 }
 
-func GETClassroomList(c *gin.Context) {
+// GETClassroom handles classroom detail request.
+func GETClassroom(c *gin.Context) {
 	var err error
-	var classroomInfos []datatransfers.ClassroomInfo
-	userID := c.GetString(constants.RouterKeyUserID)
-	if classroomInfos, err = handlers.Handler.ClassroomGetAllByUserID(userID); err != nil {
+	var classroomInfo datatransfers.ClassroomInfo
+	classroomInfo.ID = c.Param("classroom_id")
+	if classroomInfo, err = handlers.Handler.ClassroomGetOneByID(classroomInfo.ID); err != nil {
 		c.JSON(http.StatusNotFound, datatransfers.Response{Error: "cannot find classroom"})
 		return
 	}
-	c.JSON(http.StatusOK, datatransfers.Response{Data: classroomInfos})
+	c.JSON(http.StatusOK, datatransfers.Response{Data: classroomInfo})
 }
 
+// POSTClassroom handles classroom creation request.
 func POSTClassroom(c *gin.Context) {
 	var err error
 	var classroomInfo datatransfers.ClassroomInfo
@@ -47,6 +50,7 @@ func POSTClassroom(c *gin.Context) {
 	c.JSON(http.StatusOK, datatransfers.Response{Data: classroomInfo.ID})
 }
 
+// PUTClassroom handles classroom update request.
 func PUTClassroom(c *gin.Context) {
 	var err error
 	var classroomInfo datatransfers.ClassroomInfo
@@ -69,6 +73,7 @@ func PUTClassroom(c *gin.Context) {
 	c.JSON(http.StatusOK, datatransfers.Response{})
 }
 
+// DELETEClassroom handles classroom deletion request.
 func DELETEClassroom(c *gin.Context) {
 	var err error
 	var classroomInfo datatransfers.ClassroomInfo

fableous-be/controllers/init.go

@@ -10,6 +10,7 @@ import (
 	"github.com/deco-finter/fableous/fableous-be/utils"
 )
 
+// InitializeRouter initialize the gin router.
 func InitializeRouter() (router *gin.Engine) {
 	router = gin.Default()
 	router.Use(

fableous-be/controllers/middleware/auth.go

@@ -14,6 +14,7 @@ import (
 	"github.com/deco-finter/fableous/fableous-be/handlers"
 )
 
+// AuthMiddleware is a middleware that checks for a valid JWT token.
 func AuthMiddleware(c *gin.Context) {
 	var token string
 	if token = strings.TrimPrefix(c.GetHeader("Authorization"), "Bearer "); token == "" {
@@ -38,6 +39,7 @@ func AuthMiddleware(c *gin.Context) {
 	c.Next()
 }
 
+// parseToken parses a JWT token and returns the claims.
 func parseToken(tokenString, secret string) (claims datatransfers.JWTClaims, err error) {
 	if token, err := jwt.ParseWithClaims(tokenString, &claims, func(token *jwt.Token) (interface{}, error) {
 		return []byte(secret), nil

fableous-be/controllers/middleware/cors.go

@@ -7,6 +7,7 @@ import (
 	"github.com/gin-gonic/gin"
 )
 
+// CORSMiddleware allows cross-origin resource sharing.
 func CORSMiddleware(c *gin.Context) {
 	cors.New(cors.Config{
 		AllowOrigins:     []string{"*"},

fableous-be/controllers/ping.go

@@ -8,6 +8,8 @@ import (
 	"github.com/deco-finter/fableous/fableous-be/config"
 )
 
+// GETPing is a healthcheck endpoint.
+// It reponds with the application version.
 func GETPing(c *gin.Context) {
 	c.JSON(http.StatusOK, map[string]string{"version": config.AppConfig.Version})
 }

fableous-be/controllers/session.go

@@ -11,6 +11,7 @@ import (
 	"github.com/deco-finter/fableous/fableous-be/handlers"
 )
 
+// GETSessionList handles session list for a classroom request.
 func GETSessionList(c *gin.Context) {
 	var err error
 	var sessionInfos []datatransfers.SessionInfo
@@ -24,6 +25,7 @@ func GETSessionList(c *gin.Context) {
 	c.JSON(http.StatusOK, datatransfers.Response{Data: sessionInfos})
 }
 
+// GETSession handles session detail request.
 func GETSession(c *gin.Context) {
 	var err error
 	var sessionInfo datatransfers.SessionInfo
@@ -37,6 +39,8 @@ func GETSession(c *gin.Context) {
 	c.JSON(http.StatusOK, datatransfers.Response{Data: sessionInfo})
 }
 
+// GETOngoinSession handles ongoing session request.
+// 404 if no ongoing session is found.
 func GETOngoingSession(c *gin.Context) {
 	var err error
 	var sessionInfo datatransfers.SessionInfo
@@ -50,6 +54,7 @@ func GETOngoingSession(c *gin.Context) {
 	c.JSON(http.StatusOK, datatransfers.Response{Data: sessionInfo})
 }
 
+// POSTSession handles session creation request.
 func POSTSession(c *gin.Context) {
 	var err error
 	var classroomInfo datatransfers.ClassroomInfo
@@ -84,6 +89,7 @@ func POSTSession(c *gin.Context) {
 	c.JSON(http.StatusOK, datatransfers.Response{Data: sessionInfo.ID})
 }
 
+// PUTSession handles session update request.
 func PUTSession(c *gin.Context) {
 	var err error
 	var classroomInfo datatransfers.ClassroomInfo
@@ -112,6 +118,7 @@ func PUTSession(c *gin.Context) {
 	c.JSON(http.StatusOK, datatransfers.Response{})
 }
 
+// DELETESession handles session deletion request.
 func DELETESession(c *gin.Context) {
 	var err error
 	var classroomInfo datatransfers.ClassroomInfo

fableous-be/controllers/user.go

@@ -10,6 +10,7 @@ import (
 	"github.com/deco-finter/fableous/fableous-be/handlers"
 )
 
+// GETUser handles user detail request.
 func GETUser(c *gin.Context) {
 	var err error
 	var userInfo datatransfers.UserInfo
@@ -20,6 +21,7 @@ func GETUser(c *gin.Context) {
 	c.JSON(http.StatusOK, datatransfers.Response{Data: userInfo})
 }
 
+// PUTUser handles user update request.
 func PUTUser(c *gin.Context) {
 	var err error
 	var user datatransfers.UserUpdate

fableous-be/controllers/websocket.go

@@ -12,6 +12,7 @@ import (
 	pb "github.com/deco-finter/fableous/fableous-be/protos"
 )
 
+// GETConnectHubWS handles WebSocket connection from the hub.
 func GETConnectHubWS(c *gin.Context) {
 	var err error
 	var classroomInfo datatransfers.ClassroomInfo
@@ -30,6 +31,7 @@ func GETConnectHubWS(c *gin.Context) {
 	_ = handlers.Handler.ConnectHubWS(c, classroomInfo.ID)
 }
 
+// GETConnectControllerWS handles WebSocket connection from the controller.
 func GETConnectControllerWS(c *gin.Context) {
 	var err error
 	var classroomToken string

fableous-be/datatransfers/auth.go

@@ -5,6 +5,7 @@ import (
 	"time"
 )
 
+// JWTClaims is the JWT claims struct.
 type JWTClaims struct {
 	ID        string `json:"sub,omitempty"`
 	ExpiresAt int64  `json:"exp,omitempty"`

fableous-be/datatransfers/classroom.go

@@ -4,6 +4,7 @@ import (
 	"time"
 )
 
+// ClassroomInfo is the data transfer object for the Classroom entity.
 type ClassroomInfo struct {
 	ID        string    `json:"id" binding:"-"`
 	UserID    string    `json:"-" binding:"-"`

fableous-be/datatransfers/response.go

@@ -1,5 +1,6 @@
 package datatransfers
 
+// Response is the API response wrapper.
 type Response struct {
 	Code  int         `json:"code,omitempty"`
 	Data  interface{} `json:"data,omitempty"`

fableous-be/datatransfers/session.go

@@ -2,13 +2,15 @@ package datatransfers
 
 import "time"
 
+// SessionUpdate is the data transfer object used for updating the Session entity.
 type SessionUpdate struct {
 	ID          string `json:"id" binding:"-"`
 	ClassroomID string `json:"-" binding:"-"`
 	Title       string `json:"title" binding:"required"`
 	Description string `json:"description" binding:"required"`
 }
 
+// SessionInfo is the data transfer object for the Session entity.
 type SessionInfo struct {
 	ID             string    `json:"id" binding:"-"`
 	ClassroomID    string    `json:"-" binding:"-"`

fableous-be/datatransfers/user.go

@@ -4,22 +4,26 @@ import (
 	"time"
 )
 
+// UserLogin is the data transfer object used for logging in a user.
 type UserLogin struct {
 	Email    string `json:"email" binding:"required"`
 	Password string `json:"password" binding:"required"`
 }
 
+// UserSignup is the data transfer object used for signing up a new user.
 type UserSignup struct {
 	Name     string `json:"name" binding:"required"`
 	Email    string `json:"email" binding:"required"`
 	Password string `json:"password" binding:"required"`
 }
 
+// UserUpdate is the data transfer object used for updating the User entity.
 type UserUpdate struct {
 	Name  string `json:"name" binding:"-"`
 	Email string `json:"email" binding:"-"`
 }
 
+// UserInfo is the data transfer object for the User entity.
 type UserInfo struct {
 	ID        string    `json:"id" uri:"id"`
 	Name      string    `json:"name"`

fableous-be/handlers/auth.go

@@ -13,6 +13,7 @@ import (
 	"github.com/deco-finter/fableous/fableous-be/models"
 )
 
+// Authenticate issues a token for the given user credentials
 func (m *module) Authenticate(credentials datatransfers.UserLogin) (token string, err error) {
 	var user models.User
 	if user, err = m.db.userOrmer.GetOneByEmail(credentials.Email); err != nil {
@@ -24,6 +25,7 @@ func (m *module) Authenticate(credentials datatransfers.UserLogin) (token string
 	return generateToken(user)
 }
 
+// generateToken generates a JWT token for the given user
 func generateToken(user models.User) (string, error) {
 	now := time.Now()
 	expiry := time.Now().Add(constants.AuthenticationTimeout)

fableous-be/handlers/classroom.go

@@ -11,6 +11,7 @@ import (
 	"github.com/deco-finter/fableous/fableous-be/models"
 )
 
+// ClassroomGetByID returns a classroom by its ID.
 func (m *module) ClassroomGetOneByID(id string) (classroomInfo datatransfers.ClassroomInfo, err error) {
 	var classroom models.Classroom
 	if classroom, err = m.db.classroomOrmer.GetOneByID(id); err != nil {
@@ -25,6 +26,7 @@ func (m *module) ClassroomGetOneByID(id string) (classroomInfo datatransfers.Cla
 	return
 }
 
+// ClassroomGetAllByUserID returns all classrooms owned by a user.
 func (m *module) ClassroomGetAllByUserID(userID string) (classroomInfos []datatransfers.ClassroomInfo, err error) {
 	var classrooms []models.Classroom
 	classroomInfos = make([]datatransfers.ClassroomInfo, 0)
@@ -44,6 +46,7 @@ func (m *module) ClassroomGetAllByUserID(userID string) (classroomInfos []datatr
 	return
 }
 
+// ClassroomInsert inserts a new classroom.
 func (m *module) ClassroomInsert(classroomInfo datatransfers.ClassroomInfo) (classroomID string, err error) {
 	if classroomID, err = m.db.classroomOrmer.Insert(models.Classroom{
 		UserID: classroomInfo.UserID,
@@ -54,6 +57,7 @@ func (m *module) ClassroomInsert(classroomInfo datatransfers.ClassroomInfo) (cla
 	return
 }
 
+// ClassroomUpdate updates a classroom.
 func (m *module) ClassroomUpdate(classroomInfo datatransfers.ClassroomInfo) (err error) {
 	if err = m.db.classroomOrmer.Update(models.Classroom{
 		ID:   classroomInfo.ID,
@@ -64,6 +68,8 @@ func (m *module) ClassroomUpdate(classroomInfo datatransfers.ClassroomInfo) (err
 	return
 }
 
+// ClassroomDeleteByID deletes a classroom by its ID.
+// It also stops any ongoing session and removes all its sessions' static files.
 func (m *module) ClassroomDeleteByID(classroomID string) (err error) {
 	m.sessions.mutex.Lock()
 	for classroomToken, sess := range m.sessions.keys {