private static async Task HandleModifyPostAsync()
{
var post = AskUserToPickAPost(await HandleListAllPostsAsync());
if (post is null)
{
return;
}
var newPost = AskUserToModifyPost(post);
if (newPost is null)
{
return;
}
var postList = new List <Post> {
post, newPost
};
var payload = ListPostsCommand.FromList(postList);
var header = new Header
{
Command = CommandType.ModifyPost,
Type = HeaderType.Request,
DataLength = payload.Length
};
await EncodeHeaderAndSendAsync(header);
await SendCommandDataAsync(payload);
PrintServerBooleanResponse(await ReceiveServerResponseAsync());
}
private static async Task <List <Post> > HandleListAllPostsAsync()
{
var requestHeader = new Header
{
Command = CommandType.ListPosts,
Type = HeaderType.Request,
DataLength = 0
};
await EncodeHeaderAndSendAsync(requestHeader);
var response = await ReceiveServerResponseAsync();
if (response != null)
{
return
(response.Header?.DataLength == 0
? new List <Post>()
: ListPostsCommand.FromBytes(response.Data));
}
return(null);
}
private static async Task <List <Post> > GetPostListByTopicAsync(Topic topic)
{
var requestData = topic.Name.ToBytes();
var requestHeader = new Header
{
Command = CommandType.ListPostsByTopic,
Type = HeaderType.Request,
DataLength = requestData.Length
};
await EncodeHeaderAndSendAsync(requestHeader);
await SendCommandDataAsync(requestData);
var response = await ReceiveServerResponseAsync();
if (response.Header.DataLength == 0)
{
Console.WriteLine("There are no posts to display");
return(new List <Post>());
}
return(ListPostsCommand.FromBytes(response.Data));
}
private static async Task HandleRemovePostAsync()
{
var post = AskUserToPickAPost(await HandleListAllPostsAsync());
if (post is null)
{
return;
}
var listToRemove = ListPostsCommand.FromList(new List <Post> {
post
});
var header = new Header
{
Command = CommandType.RemovePost,
Type = HeaderType.Request,
DataLength = listToRemove.Length
};
await EncodeHeaderAndSendAsync(header);
await SendCommandDataAsync(listToRemove);
PrintServerBooleanResponse(await ReceiveServerResponseAsync());
}
