Class MessageList

The open room's timeline as items: events become messages, while edits, deletions and reactions change the messages they refer to.

Inheritance
object
MessageList
Inherited Members
Namespace: Uniform.Chat.Avalonia.ViewModels
Assembly: Uniform.Chat.Avalonia.dll
Syntax
public sealed class MessageList
Remarks

Methods taking a Room read room state, so call them under the room store's lock.

Constructors

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MessageList(string)

Create an empty list for ownUserId.

Declaration
public MessageList(string ownUserId)
Parameters
Type Name Description
string ownUserId

Properties

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IsBlocked

Return whether the user has blocked, i.e. ignores, a sender, whose messages are then not shown; null shows all.

Declaration
public Func<string, bool>? IsBlocked { get; init; }
Property Value
Type Description
Func<string, bool>
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Items

Items in time order, unsent messages last.

Declaration
public ObservableCollection<MessageViewModel> Items { get; }
Property Value
Type Description
ObservableCollection<MessageViewModel>
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NewestEventId

Newest event ID shown, for read markers.

Declaration
public string? NewestEventId { get; }
Property Value
Type Description
string

Methods

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Append(Room, IEnumerable<ClientEvent>)

Add newer events, oldest first, before the unsent messages; an edit, reaction or deletion of a message not shown changes nothing, as it loads with that message's line.

Declaration
public void Append(Room room, IEnumerable<ClientEvent> events)
Parameters
Type Name Description
Room room
IEnumerable<ClientEvent> events
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Find(string)

Return the item of eventId, or null.

Declaration
public MessageViewModel? Find(string eventId)
Parameters
Type Name Description
string eventId
Returns
Type Description
MessageViewModel
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Prepend(Room, IEnumerable<ClientEvent>)

Add older events, oldest first, before the current items.

Declaration
public void Prepend(Room room, IEnumerable<ClientEvent> events)
Parameters
Type Name Description
Room room
IEnumerable<ClientEvent> events
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Reset(Room, IEnumerable<ClientEvent>)

Replace the items with events, oldest first.

Declaration
public void Reset(Room room, IEnumerable<ClientEvent> events)
Parameters
Type Name Description
Room room
IEnumerable<ClientEvent> events
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SetPending(Room, IEnumerable<OutboxMessage>)

Show the room's unsent messages after the timeline, replacing the previous ones.

Declaration
public void SetPending(Room room, IEnumerable<OutboxMessage> unsent)
Parameters
Type Name Description
Room room
IEnumerable<OutboxMessage> unsent