/// <summary>
/// Wrapper for handling replace task, but without adding to merge records.
/// </summary>
/// <param name="vote">The vote being modified.</param>
/// <param name="task">The new task to apply to the vote.</param>
/// <returns>Returns true if the task replacement was successfully completed.</returns>
private bool ReplaceTaskImplWrapper(VoteLineBlock vote, string task)
{
if (!VoteStorage.TryGetValue(vote, out var supporters))
{
return(false);
}
// Incoming parameter may be an entry in storage, or a copy of a vote.
// Adjust so that we're always pointing at an actual vote.
// If the vote isn't found in VoteStorage, just use the one provided.
vote = VoteStorage.GetVoteMatching(vote) ?? vote;
// Remove the version of the vote we're starting with.
VoteStorage.Remove(vote);
string originalTask = vote.Task;
vote.Task = task;
// If there's a conflict with the newly-tasked vote, we need to merge with the existing vote.
if (VoteStorage.ContainsKey(vote))
{
if (VoteStorage.TryGetValue(vote, out var toSupport))
{
foreach (var(supporterName, supporterVote) in supporters)
{
if (!toSupport.ContainsKey(supporterName))
{
supporterVote.Task = task;
toSupport.Add(supporterName, supporterVote);
}
}
}
else
{
// Undo the attempt if we couldn't get the conflicting vote data
vote.Task = originalTask;
VoteStorage.Add(vote, supporters);
return(false);
}
}
// If there's no conflict, update the tasks in the supporter votes and add the revised vote.
else
{
foreach (var(_, supporterVote) in supporters)
{
supporterVote.Task = task;
}
VoteStorage.Add(vote, supporters);
}
return(true);
}
public UndoAction(UndoActionType actionType, VoteStorage currentState,
VoteLineBlock?storageVote = null)
{
ActionType = actionType;
// Clone the current vote repository.
storage = new VoteStorage(currentState);
// Utilize a cloned storage vote if we need to track a changed VoteLineBlock
// that had internal properties changed. Otherwise those will be propogated
// to our storage collection.
if (storageVote != null)
{
var storedVote = storageVote.Clone();
storage.TryGetValue(storageVote, out var storedVoteSupporters);
storage.Remove(storageVote);
storage.Add(storedVote, storedVoteSupporters);
}
}
