Uni/CSI-ES-2324
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[PD1] Error handling project-wide

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This commit is contained in:
Afonso Franco 2024-04-28 22:02:13 +01:00
parent f5b3726673
commit b918211736
Signed by: afonso
SSH key fingerprint: SHA256:aiLbdlPwXKJS5wMnghdtod0SPy8imZjlVvCyUX9DJNk
13 changed files with 364 additions and 245 deletions
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44
Projs/PD1/internal/server/datastore.go
View file

@ -4,6 +4,7 @@ import (
"PD1/internal/protocol"
"crypto/x509"
"database/sql"
"errors"
"fmt"
"log"
"time"
@ -15,14 +16,17 @@ type DataStore struct {
db *sql.DB
}
func OpenDB() DataStore {
func OpenDB() (DataStore, error) {
db, err := sql.Open("sqlite3", "server.db")
if err != nil {
log.Fatalln("Error opening db file")
return DataStore{}, err
}
ds := DataStore{db: db}
ds.CreateTables()
return ds
err = ds.CreateTables()
if err != nil {
return DataStore{}, err
}
return ds, nil
}
func (ds DataStore) CreateTables() error {
@ -32,7 +36,6 @@ func (ds DataStore) CreateTables() error {
userCert BLOB
)`)
if err != nil {
fmt.Println("Error creating users table", err)
return err
}
@ -50,7 +53,6 @@ func (ds DataStore) CreateTables() error {
FOREIGN KEY(toUID) REFERENCES users(UID)
)`)
if err != nil {
fmt.Println("Error creating messages table", err)
return err
}
@ -70,7 +72,6 @@ func (ds DataStore) CreateTables() error {
END;
`)
if err != nil {
fmt.Println("Error creating trigger", err)
return err
}
@ -91,7 +92,7 @@ func (ds DataStore) GetMessage(toUID string, position int) protocol.Packet {
if err == sql.ErrNoRows {
log.Printf("No message with NUM %v for UID %v\n", position, toUID)
errorMessage := fmt.Sprintf("No message with NUM %v", position)
return protocol.NewReportErrorPacket(errorMessage)
return protocol.NewReportErrorPacket(errorMessage)
}
return protocol.NewAnswerGetMsgPacket(serverMessage.FromUID, serverMessage.ToUID, serverMessage.Subject, serverMessage.Body, serverMessage.Timestamp, true)
@ -116,14 +117,13 @@ func (ds DataStore) MarkMessageInQueueAsRead(toUID string, position int) {
}
}
func (ds DataStore) GetUnreadMsgsInfo(toUID string, page int, pageSize int) protocol.Packet {
func (ds DataStore) GetUnreadMsgsInfo(toUID string, page int, pageSize int) (protocol.Packet, error) {
// Retrieve the total count of unread messages
var totalCount int
err := ds.db.QueryRow("SELECT COUNT(*) FROM messages WHERE toUID = ? AND status = 0", toUID).Scan(&totalCount)
if err == sql.ErrNoRows {
log.Printf("No unread messages for UID %v: %v", toUID, err)
return protocol.NewAnswerGetUnreadMsgsInfoPacket(0, 0, []protocol.MsgInfo{})
return protocol.NewAnswerGetUnreadMsgsInfoPacket(0, 0, []protocol.MsgInfo{}), nil
}
// Query to retrieve all messages from the user's queue
@ -157,19 +157,18 @@ func (ds DataStore) GetUnreadMsgsInfo(toUID string, page int, pageSize int) prot
var timestamp time.Time
var queuePosition, status int
if err := rows.Scan(&fromUID, &toUID, &timestamp, &queuePosition, &subject, &status); err != nil {
panic(err)
return protocol.Packet{}, err
}
answerGetUnreadMsgsInfo := protocol.NewMsgInfo(queuePosition, fromUID, subject, timestamp)
messageInfoPackets = append(messageInfoPackets, answerGetUnreadMsgsInfo)
}
if err := rows.Err(); err != nil {
log.Printf("Error when getting messages for UID %v: %v", toUID, err)
return protocol.NewReportErrorPacket(err.Error())
return protocol.Packet{}, err
}
numberOfPages := (totalCount + pageSize - 1) / pageSize
currentPage := min(numberOfPages, page)
return protocol.NewAnswerGetUnreadMsgsInfoPacket(currentPage, numberOfPages, messageInfoPackets)
return protocol.NewAnswerGetUnreadMsgsInfoPacket(currentPage, numberOfPages, messageInfoPackets), nil
}
func (ds DataStore) AddMessageToQueue(fromUID string, message protocol.SendMsg) protocol.Packet {
@ -218,17 +217,16 @@ func (ds DataStore) userExists(uid string) bool {
// Execute the SQL query
err := ds.db.QueryRow(query, uid).Scan(&count)
if err == sql.ErrNoRows {
log.Printf("User with UID %v does not exist", uid)
return false
} else {
return true
log.Println("user with UID %v does not exist", uid)
return false
}
return true
}
func (ds DataStore) storeUserCertIfNotExists(uid string, cert x509.Certificate) {
func (ds DataStore) storeUserCertIfNotExists(uid string, cert x509.Certificate) error {
// Check if the user already exists
if ds.userExists(uid) {
return
return nil
}
// Insert the user certificate
@ -238,8 +236,8 @@ func (ds DataStore) storeUserCertIfNotExists(uid string, cert x509.Certificate)
`
_, err := ds.db.Exec(insertQuery, uid, cert.Raw)
if err != nil {
log.Printf("Error storing user certificate for UID %s: %v\n", uid, err)
return
return errors.New(fmt.Sprintf("Error storing user certificate for UID %s: %v\n", uid, err))
}
log.Printf("User certificate for UID %s stored successfully.\n", uid)
return nil
}