public async Task <HttpResponseMessage> UpdateMessageByID(int messageID, JObject requestBodyData)
{
ExceptionHandler exceptionHandler = new ExceptionHandler(log);
DatabaseFunctions databaseFunctions = new DatabaseFunctions();
Message newMessage = requestBodyData.ToObject <Message>();
string queryString = $"UPDATE [dbo].[Message] SET ";
/* Loop through the properties of the jObject Object which contains the values given in the requestBody
* loop through the hardcoded properties in the Message Entity to check if they correspond with the requestBody
* to prevent SQL injection. */
foreach (JProperty property in requestBodyData.Properties())
{
foreach (PropertyInfo props in newMessage.GetType().GetProperties())
{
if (props.Name == property.Name)
{
/* fill the queryString with the property names from the Message and their values */
queryString += $"{props.Name} = @{property.Name},";
}
}
}
queryString = databaseFunctions.RemoveLastCharacters(queryString, 1);
queryString += $@" WHERE MessageID = @messageID;";
try {
using (SqlConnection connection = new SqlConnection(connectionString)) {
//The connection is automatically closed when going out of scope of the using block.
//The connection may fail to open, in which case a [503 Service Unavailable] is returned.
connection.Open();
try {
using (SqlCommand command = new SqlCommand(queryString, connection)) {
// Parameters are used to ensure no SQL injection can take place.
/* pass the requestBody, the entity with the corresponding properties and the SqlCommand to the method
* to ensure working SqlInjection for the incoming values*/
databaseFunctions.AddSqlInjection(requestBodyData, newMessage, command);
log.LogInformation($"Executing the following query: {queryString}");
int affectedRows = await command.ExecuteNonQueryAsync();
//The SQL query must have been incorrect if no rows were executed, return a [404 Not Found].
if (affectedRows == 0)
{
log.LogError("Zero rows were affected.");
return(exceptionHandler.NotFound());
}
}
}
catch (SqlException e) {
//The Query may fail, in which case a [400 Bad Request] is returned.
log.LogError("SQL Query has failed to execute.");
log.LogError(e.Message);
return(exceptionHandler.BadRequest(log));
}
}
}
catch (SqlException e) {
//The connection may fail to open, in which case a [503 Service Unavailable] is returned.
log.LogError("SQL has failed to open.");
log.LogError(e.Message);
return(exceptionHandler.ServiceUnavailable(log));
}
log.LogInformation($"{HttpStatusCode.NoContent} | Data updated succesfully.");
//Return response code [204 NoContent].
return(new HttpResponseMessage(HttpStatusCode.NoContent));
}
//Returns all connections of a specific coach
public async Task <HttpResponseMessage> GetAllConnectionsByCoachID(int coachID)
{
ExceptionHandler exceptionHandler = new ExceptionHandler(log);
List <CoachTutorantConnection> listOfCoachTutorantConnections = new List <CoachTutorantConnection>();
string queryString = $@"SELECT *
FROM [dbo].[CoachTutorantConnection]
WHERE studentIDCoach = @coachID";
try {
using (SqlConnection connection = new SqlConnection(connectionString)) {
//The connection is automatically closed when going out of scope of the using block.
//The connection may fail to open, in which case a [503 Service Unavailable] is returned.
connection.Open();
try {
//Get all connections from the CoachTutorantConnections table for a specific coach
using (SqlCommand command = new SqlCommand(queryString, connection)) {
//Parameters are used to ensure no SQL injection can take place
command.Parameters.Add("@coachID", SqlDbType.Int).Value = coachID;
log.LogInformation($"Executing the following query: {queryString}");
//The Query may fail, in which case a [400 Bad Request] is returned.
using (SqlDataReader reader = await command.ExecuteReaderAsync()) {
if (!reader.HasRows)
{
//Query was succesfully executed, but returned no data.
//Return response code [404 Not Found]
log.LogError("SQL Query was succesfully executed, but returned no data.");
return(exceptionHandler.NotFound());
}
while (reader.Read())
{
listOfCoachTutorantConnections.Add(new CoachTutorantConnection {
//Reader 0 contains coachTutorantConnectionID key (of the database),
//this data is irrelevant for the user.
studentIDTutorant = SafeReader.SafeGetInt(reader, 1),
studentIDCoach = SafeReader.SafeGetInt(reader, 2),
status = SafeReader.SafeGetString(reader, 3)
});
}
}
}
} catch (SqlException e) {
//The Query may fail, in which case a [400 Bad Request] is returned.
log.LogError("SQL Query has failed to execute.");
log.LogError(e.Message);
return(exceptionHandler.BadRequest(log));
}
}
} catch (SqlException e) {
//The connection may fail to open, in which case a [503 Service Unavailable] is returned.
log.LogError("SQL connection has failed to open.");
log.LogError(e.Message);
return(exceptionHandler.ServiceUnavailable(log));
}
var jsonToReturn = JsonConvert.SerializeObject(listOfCoachTutorantConnections);
log.LogInformation($"{HttpStatusCode.OK} | Data shown succesfully.");
//Return response code [200 OK] and the requested data.
return(new HttpResponseMessage(HttpStatusCode.OK)
{
Content = new StringContent(jsonToReturn, Encoding.UTF8, "application/json")
});
}
public async Task <HttpResponseMessage> GetMessageByID(int messageID)
{
ExceptionHandler exceptionHandler = new ExceptionHandler(log);
Message newMessage = new Message();
string queryString = $@"SELECT * FROM [dbo].[Message] WHERE MessageID = @messageID;";
try {
using (SqlConnection connection = new SqlConnection(connectionString)) {
//The connection is automatically closed when going out of scope of the using block.
//The connection may fail to open, in which case a [503 Service Unavailable] is returned.
connection.Open();
try {
using (SqlCommand command = new SqlCommand(queryString, connection)) {
command.Parameters.Add("@messageID", SqlDbType.Int).Value = messageID;
log.LogInformation($"Executing the following query: {queryString}");
using (SqlDataReader reader = await command.ExecuteReaderAsync()) {
if (!reader.HasRows)
{
//Query was succesfully executed, but returned no data.
//Return response code [404 Not Found]
log.LogError("SQL Query was succesfully executed, but returned no data.");
return(exceptionHandler.NotFound());
}
while (reader.Read())
{
newMessage = new Message {
MessageID = reader.GetInt32(0),
type = SafeReader.SafeGetString(reader, 1),
payload = SafeReader.SafeGetString(reader, 2),
created = SafeReader.SafeGetDateTime(reader, 3),
lastModified = SafeReader.SafeGetDateTime(reader, 4),
senderID = SafeReader.SafeGetInt(reader, 5),
receiverID = SafeReader.SafeGetInt(reader, 6)
};
}
}
}
} catch (SqlException e) {
//The Query may fail, in which case a [400 Bad Request] is returned.
log.LogError("SQL Query has failed to execute.");
log.LogError(e.Message);
return(exceptionHandler.BadRequest(log));
}
}
} catch (SqlException e) {
//The connection may fail to open, in which case a [503 Service Unavailable] is returned.
log.LogError("SQL has failed to open.");
log.LogError(e.Message);
return(exceptionHandler.ServiceUnavailable(log));
}
var jsonToReturn = JsonConvert.SerializeObject(newMessage);
log.LogInformation($"{HttpStatusCode.OK} | Data shown succesfully.");
//Return response code [200 OK] and the requested data.
// Everything went fine, return status code 200.
return(new HttpResponseMessage(HttpStatusCode.OK)
{
Content = new StringContent(jsonToReturn, Encoding.UTF8, "application/json")
});
}
//Changes the status of a CoachTutorantConnection.
public async Task <HttpResponseMessage> UpdateConnection(JObject requestBodyData)
{
ExceptionHandler exceptionHandler = new ExceptionHandler(log);
DatabaseFunctions databaseFunctions = new DatabaseFunctions();
//Verify if all parameters for the CoachTutorantConnection exist.
//One or more parameters may be missing, in which case a [400 Bad Request] is returned.
if (requestBodyData["status"] == null)
{
log.LogError("Requestbody is missing data for the CoachTutorantConnection table!");
return(exceptionHandler.BadRequest(log));
}
/* Make a Connection entity from the requestBody after checking the required fields */
CoachTutorantConnection coachTutorantConnection = requestBodyData.ToObject <CoachTutorantConnection>();
string queryString = $@"UPDATE [dbo].[CoachTutorantConnection]
SET status = @status
WHERE studentIDTutorant = @studentIDTutorant AND studentIDCoach = @studentIDCoach;";
try {
using (SqlConnection connection = new SqlConnection(connectionString)) {
//The connection is automatically closed when going out of scope of the using block.
//The connection may fail to open, in which case a [503 Service Unavailable] is returned.
connection.Open();
try {
//Update the status for the tutorant/coach connection
//The Query may fail, in which case a [400 Bad Request] is returned.
using (SqlCommand command = new SqlCommand(queryString, connection)) {
//Parameters are used to ensure no SQL injection can take place
dynamic dObject = coachTutorantConnection;
databaseFunctions.AddSqlInjection(requestBodyData, dObject, command);
log.LogInformation($"Executing the following query: {queryString}");
int affectedRows = await command.ExecuteNonQueryAsync();
//The studentIDs must be incorrect if no rows were affected, return a [404 Not Found].
if (affectedRows == 0)
{
log.LogError("Zero rows were affected.");
return(exceptionHandler.NotFound());
}
}
} catch (SqlException e) {
//The Query may fail, in which case a [400 Bad Request] is returned.
log.LogError("SQL Query has failed to execute.");
log.LogError(e.Message);
return(exceptionHandler.BadRequest(log));
}
}
} catch (SqlException e) {
//The connection may fail to open, in which case a [503 Service Unavailable] is returned.
log.LogError("SQL has failed to open.");
log.LogError(e.Message);
return(exceptionHandler.ServiceUnavailable(log));
}
log.LogInformation($"{HttpStatusCode.NoContent} | Data updated succesfully.");
//Return response code [204 NoContent].
return(new HttpResponseMessage(HttpStatusCode.NoContent));
}
