/// <summary>
/// Initializes a new instance of the <see cref="CommentViewModel"/> class.
/// </summary>
/// <param name="commentService">The comment service</param>
/// <param name="thread">The thread that the comment is a part of.</param>
/// <param name="currentUser">The current user.</param>
/// <param name="pullRequestId">The pull request id of the comment.</param>
/// <param name="commentId">The GraphQL ID of the comment.</param>
/// <param name="databaseId">The database id of the comment.</param>
/// <param name="body">The comment body.</param>
/// <param name="state">The comment edit state.</param>
/// <param name="author">The author of the comment.</param>
/// <param name="updatedAt">The modified date of the comment.</param>
/// <param name="webUrl"></param>
protected CommentViewModel(
ICommentService commentService,
ICommentThreadViewModel thread,
IActorViewModel currentUser,
int pullRequestId,
string commentId,
int databaseId,
string body,
CommentEditState state,
IActorViewModel author,
DateTimeOffset updatedAt,
Uri webUrl)
{
this.commentService = commentService;
Guard.ArgumentNotNull(thread, nameof(thread));
Guard.ArgumentNotNull(currentUser, nameof(currentUser));
Guard.ArgumentNotNull(author, nameof(author));
Thread = thread;
CurrentUser = currentUser;
Id = commentId;
DatabaseId = databaseId;
PullRequestId = pullRequestId;
Body = body;
EditState = state;
Author = author;
UpdatedAt = updatedAt;
WebUrl = webUrl;
var canDeleteObservable = this.WhenAnyValue(
x => x.EditState,
x => x == CommentEditState.None && author.Login == currentUser.Login);
canDelete = canDeleteObservable.ToProperty(this, x => x.CanDelete);
Delete = ReactiveCommand.CreateAsyncTask(canDeleteObservable, DoDelete);
var canEdit = this.WhenAnyValue(
x => x.EditState,
x => x == CommentEditState.Placeholder || (x == CommentEditState.None && author.Login == currentUser.Login));
BeginEdit = ReactiveCommand.Create(canEdit);
BeginEdit.Subscribe(DoBeginEdit);
AddErrorHandler(BeginEdit);
CommitEdit = ReactiveCommand.CreateAsyncTask(
Observable.CombineLatest(
this.WhenAnyValue(x => x.IsReadOnly),
this.WhenAnyValue(x => x.Body, x => !string.IsNullOrWhiteSpace(x)),
this.WhenAnyObservable(x => x.Thread.PostComment.CanExecuteObservable),
(readOnly, hasBody, canPost) => !readOnly && hasBody && canPost),
DoCommitEdit);
AddErrorHandler(CommitEdit);
CancelEdit = ReactiveCommand.Create(CommitEdit.IsExecuting.Select(x => !x));
CancelEdit.Subscribe(DoCancelEdit);
AddErrorHandler(CancelEdit);
OpenOnGitHub = ReactiveCommand.Create(this.WhenAnyValue(x => x.Id).Select(x => x != null));
}
/// <summary>
/// Initializes a new instance of the <see cref="CommentViewModel"/> class.
/// </summary>
/// <param name="thread">The thread that the comment is a part of.</param>
/// <param name="currentUser">The current user.</param>
/// <param name="commentId">The ID of the comment.</param>
/// <param name="commentNodeId">The GraphQL ID of the comment.</param>
/// <param name="body">The comment body.</param>
/// <param name="state">The comment edit state.</param>
/// <param name="user">The author of the comment.</param>
/// <param name="updatedAt">The modified date of the comment.</param>
protected CommentViewModel(
ICommentThreadViewModel thread,
IAccount currentUser,
int commentId,
string commentNodeId,
string body,
CommentEditState state,
IAccount user,
DateTimeOffset updatedAt)
{
Guard.ArgumentNotNull(thread, nameof(thread));
Guard.ArgumentNotNull(currentUser, nameof(currentUser));
Guard.ArgumentNotNull(body, nameof(body));
Guard.ArgumentNotNull(user, nameof(user));
Thread = thread;
CurrentUser = currentUser;
Id = commentId;
NodeId = commentNodeId;
Body = body;
EditState = state;
User = user;
UpdatedAt = updatedAt;
var canDelete = this.WhenAnyValue(
x => x.EditState,
x => x == CommentEditState.None && user.Login.Equals(currentUser.Login));
canDelete.ToProperty(this, x => x.CanDelete);
Delete = ReactiveCommand.CreateAsyncTask(canDelete, DoDelete);
var canEdit = this.WhenAnyValue(
x => x.EditState,
x => x == CommentEditState.Placeholder || (x == CommentEditState.None && user.Login.Equals(currentUser.Login)));
BeginEdit = ReactiveCommand.Create(canEdit);
BeginEdit.Subscribe(DoBeginEdit);
AddErrorHandler(BeginEdit);
CommitEdit = ReactiveCommand.CreateAsyncTask(
Observable.CombineLatest(
this.WhenAnyValue(x => x.IsReadOnly),
this.WhenAnyValue(x => x.Body, x => !string.IsNullOrWhiteSpace(x)),
this.WhenAnyObservable(x => x.Thread.PostComment.CanExecuteObservable),
(readOnly, hasBody, canPost) => !readOnly && hasBody && canPost),
DoCommitEdit);
AddErrorHandler(CommitEdit);
CancelEdit = ReactiveCommand.Create(CommitEdit.IsExecuting.Select(x => !x));
CancelEdit.Subscribe(DoCancelEdit);
AddErrorHandler(CancelEdit);
OpenOnGitHub = ReactiveCommand.Create(this.WhenAnyValue(x => x.Id, x => x != 0));
}