CREATE PROCEDURE [dbo].[CollectionUser_UpdateUsers]
    @CollectionId UNIQUEIDENTIFIER,
    @Users AS [dbo].[SelectionReadOnlyArray] READONLY
AS
BEGIN
    SET NOCOUNT ON

    DECLARE @OrgId UNIQUEIDENTIFIER = (
        SELECT TOP 1
            [OrganizationId]
        FROM
            [dbo].[Collection]
        WHERE
            [Id] = @CollectionId
    )

    ;WITH [AvailableUsersCTE] AS(
        SELECT
            Id
        FROM
            [dbo].[OrganizationUser]
        WHERE
            OrganizationId = @OrgId
    )
    MERGE
        [dbo].[CollectionUser] AS [Target]
    USING 
        @Users AS [Source]
    ON
        [Target].[CollectionId] = @CollectionId
        AND [Target].[OrganizationUserId] = [Source].[Id]
    WHEN NOT MATCHED BY TARGET
    AND [Source].[Id] IN (SELECT [Id] FROM [AvailableUsersCTE]) THEN
        INSERT VALUES
        (
            @CollectionId,
            [Source].[Id],
            [Source].[ReadOnly]
        )
    WHEN MATCHED AND [Target].[ReadOnly] != [Source].[ReadOnly] THEN
        UPDATE SET [Target].[ReadOnly] = [Source].[ReadOnly]
    WHEN NOT MATCHED BY SOURCE
    AND [Target].[CollectionId] = @CollectionId THEN
        DELETE
    ;

    EXEC [dbo].[User_BumpAccountRevisionDateByCollectionId] @CollectionId, @OrgId
END