channel dao

dao/Factory.go

@@ -7,6 +7,7 @@ import (
 )
 
 var userDAO IUserDAO
+var channelDAO IChannelDAO
 var sessionDAO ISessionDAO
 
 func GetUserDAO() (IUserDAO, *util.ChatError) {
@@ -22,6 +23,19 @@ func GetUserDAO() (IUserDAO, *util.ChatError) {
 	return userDAO, nil
 }
 
+func GetChannelDAO() (IChannelDAO, *util.ChatError) {
+	if !channelDAO.Ready() {
+		dao, err := postgres.MakeChannelDAO()
+		if err != nil {
+			return channelDAO, err
+		}
+
+		channelDAO = dao
+	}
+
+	return channelDAO, nil
+}
+
 func GetSessionDAO() (ISessionDAO, *util.ChatError) {
 	if !sessionDAO.Ready() {
 		dao, err := valkey.MakeUserDAO()

dao/IChannelDAD.go

@@ -0,0 +1,15 @@
+package dao
+
+import (
+	"git.tek.govt.hu/dowerx/chat/server/model"
+	"git.tek.govt.hu/dowerx/chat/server/util"
+)
+
+type IChannelDAO interface {
+	IDAO
+	Create(channel model.Channel) *util.ChatError
+	Read(channel model.Channel) (model.Channel, *util.ChatError)
+	List() ([]model.Channel, *util.ChatError)
+	Update(channel model.Channel) *util.ChatError
+	Delete(channel model.Channel) *util.ChatError
+}

dao/postgres/ChannelDAO.go

@@ -0,0 +1,87 @@
+package postgres
+
+import (
+	"git.tek.govt.hu/dowerx/chat/server/model"
+	"git.tek.govt.hu/dowerx/chat/server/util"
+	"github.com/jmoiron/sqlx"
+)
+
+type ChannelDAOPG struct {
+	pgDAO
+}
+
+// Create a new channel
+func (d ChannelDAOPG) Create(channel model.Channel) *util.ChatError {
+	_, err := d.db.NamedExec(`call add_channel(:name, :description)`, &channel)
+	return util.MakeError(err, util.DATABASE_QUERY_FAULT)
+}
+
+// Read returns a channel by ID
+func (d ChannelDAOPG) Read(channel model.Channel) (model.Channel, *util.ChatError) {
+	var rows *sqlx.Rows
+	var err error
+	rows, err = d.db.NamedQuery(`select * from "channel" where "id" = :id`, &channel)
+	if err != nil {
+		return channel, util.MakeError(err, util.DATABASE_QUERY_FAULT)
+	}
+	defer rows.Close()
+
+	if !rows.Next() {
+		return channel, &util.ChatError{Message: "", Code: util.NOT_FOUND}
+	}
+
+	err = rows.StructScan(&channel)
+	return channel, util.MakeError(err, util.DATABASE_QUERY_FAULT)
+}
+
+// List all channels
+func (d ChannelDAOPG) List() ([]model.Channel, *util.ChatError) {
+	rows, err := d.db.Queryx(`select * from "channel" order by "name"`)
+	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)
+	return util.MakeError(err, util.DATABASE_QUERY_FAULT)
+}
+
+// Delete removes a channel by ID
+func (d ChannelDAOPG) Delete(channel model.Channel) *util.ChatError {
+	var err error
+	_, err = d.db.NamedExec(`delete from "channel" where "id" = :id`, &channel)
+	return util.MakeError(err, util.DATABASE_QUERY_FAULT)
+}
+
+func (d ChannelDAOPG) Ready() bool {
+	return d.db != nil
+}
+
+func MakeChannelDAO() (ChannelDAOPG, *util.ChatError) {
+	dao := ChannelDAOPG{}
+	conn, err := getDatabase()
+	if err != nil {
+		return dao, err
+	}
+
+	dao.db = conn
+	return dao, nil
+}

dao/postgres/UserDAO.go

@@ -32,7 +32,7 @@ func (d UserDAOPG) Read(user model.User) (model.User, *util.ChatError) {
 	}
 
 	if !rows.Next() {
-		return user, &util.ChatError{Message: "", Code: util.USER_NOT_FOUND}
+		return user, &util.ChatError{Message: "", Code: util.NOT_FOUND}
 	}
 
 	err = rows.StructScan(&user)

model/Channel.go

@@ -1,6 +1,7 @@
 package model
 
 type Channel struct {
-	ID   int
+	ID          int    `db:"id" json:"id"`
-	Name string
+	Name        string `db:"name" json:"name"`
+	Description string `db:"description" json:"description"`
 }

util/errors.go

@@ -13,7 +13,7 @@ const (
 	DATABASE_CONNECTION_FAULT
 	DATABASE_QUERY_FAULT
 
-	USER_NOT_FOUND
+	NOT_FOUND
 	WRONG_PASSWORD
 	USERNAME_TOO_SHORT
 	PASSWORD_TOO_SHORT
@@ -24,7 +24,7 @@ var codeToMessage = map[ChatErrorCode]string{
 	GENERAL_ERROR:             "an unexpected error occurred",
 	DATABASE_CONNECTION_FAULT: "database connection failed",
 	DATABASE_QUERY_FAULT:      "database query failed",
-	USER_NOT_FOUND:            "user not found",
+	NOT_FOUND:                 "item not found",
 	WRONG_PASSWORD:            "incorrect password",
 	USERNAME_TOO_SHORT:        "username is too short",
 	PASSWORD_TOO_SHORT:        "password is too short",
@@ -58,7 +58,7 @@ func (e *ChatError) ErrorFromCode() string {
 // Status returns the http status of the error type
 func (e *ChatError) Status() int {
 	switch e.Code {
-	case USER_NOT_FOUND:
+	case NOT_FOUND:
 		fallthrough
 	case WRONG_PASSWORD:
 		fallthrough