list channels

api/chat.go

@@ -0,0 +1,22 @@
+package api
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+)
+
+func listAvailableChannels(c *gin.Context) {
+	token, _ := c.Get(SESSION_COOKIE)
+
+	channels, err := chatController.ListAvailableChannels(token.(string))
+	if err != nil {
+		sendError(c, err)
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{
+		"message":  "channels listed",
+		"channels": channels,
+	})
+}

api/endpoints.go

@@ -32,7 +32,7 @@ func initControlles() *util.ChatError {
 
 	userController = controller.MakeUserController(userDAO)
 	authController = controller.MakeAuthController(userDAO, sessionDAO)
-	chatController = controller.MakeChatController(channelDAO)
+	chatController = controller.MakeChatController(channelDAO, sessionDAO)
 
 	return nil
 }
@@ -56,6 +56,10 @@ func Listen(address string, base string) error {
 	user.Use(isLoggedIn)
 	user.GET("info/:username", userInfo)
 
+	chat := api.Group("chat")
+	chat.Use(isLoggedIn)
+	chat.GET("channels", listAvailableChannels)
+
 	server := &http.Server{
 		Addr:         address,
 		Handler:      router,

controller/ChatController.go

@@ -2,13 +2,25 @@ package controller
 
 import (
 	"git.tek.govt.hu/dowerx/chat/server/dao"
+	"git.tek.govt.hu/dowerx/chat/server/model"
+	"git.tek.govt.hu/dowerx/chat/server/util"
 )
 
 type ChatController struct {
 	channelDAO dao.IChannelDAO
+	sessionDAO dao.ISessionDAO
 }
 
-func MakeChatController(channelDAO dao.IChannelDAO) ChatController {
-	controller := ChatController{channelDAO: channelDAO}
+func (c ChatController) ListAvailableChannels(token string) ([]model.Channel, *util.ChatError) {
+	userID, err := c.sessionDAO.Get(token)
+	if err != nil {
+		return nil, err
+	}
+
+	return c.channelDAO.ListAvailableChannels(userID)
+}
+
+func MakeChatController(channelDAO dao.IChannelDAO, sessionDAO dao.ISessionDAO) ChatController {
+	controller := ChatController{channelDAO: channelDAO, sessionDAO: sessionDAO}
 	return controller
 }

dao/IChannelDAD.go

@@ -9,6 +9,7 @@ type IChannelDAO interface {
 	Create(channel model.Channel) *util.ChatError
 	Read(channel model.Channel) (model.Channel, *util.ChatError)
 	List() ([]model.Channel, *util.ChatError)
+	ListAvailableChannels(userID int) ([]model.Channel, *util.ChatError)
 	Update(channel model.Channel) *util.ChatError
 	Delete(channel model.Channel) *util.ChatError
 }

dao/postgres/ChannelDAO.go

@@ -58,6 +58,30 @@ func (d ChannelDAOPG) List() ([]model.Channel, *util.ChatError) {
 	return channels, util.MakeError(err, util.DATABASE_QUERY_FAULT)
 }
 
+// ListAvailableChannels returns channels that the given user has access to
+func (d ChannelDAOPG) ListAvailableChannels(userID int) ([]model.Channel, *util.ChatError) {
+	rows, err := d.db.Queryx(`select "channel_id" as "id", "channel_name" as "name", "channel_description" as "description" from "user_rigths_per_channel" where "user_id" = $1`, userID)
+	if err != nil {
+		return nil, util.MakeError(err, util.DATABASE_QUERY_FAULT)
+	}
+	defer rows.Close()
+
+	channels := make([]model.Channel, 0)
+
+	for rows.Next() {
+		channel := model.Channel{}
+
+		err = rows.StructScan(&channel)
+		if err != nil {
+			break
+		}
+
+		channels = append(channels, channel)
+	}
+
+	return channels, util.MakeError(err, util.DATABASE_QUERY_FAULT)
+}
+
 // Update sets all the fields of the Channel with the given ID
 func (d ChannelDAOPG) Update(channel model.Channel) *util.ChatError {
 	_, err := d.db.NamedExec(`update "channel" set "name" = :name, "description" = :description where "id" = :id`, &channel)