Delete sends belonging to user on user delete (#1116)

* Delete sends belonging to user on user delete

* Update User_DeleteById.sql

* Clean up bad autoformats

Co-authored-by: Addison Beck <abeck@bitwarden.com>

Co-authored-by: Kyle Spearrin <kspearrin@users.noreply.github.com>
Co-authored-by: Addison Beck <abeck@bitwarden.com>

src/Sql/dbo/Stored Procedures/User_DeleteById.sql

@@ -88,6 +88,13 @@ BEGIN
     OR
         [GranteeId] = @Id
 
+    -- Delete Sends
+    DELETE
+    FROM
+        [dbo].[Send]
+    WHERE 
+        [UserId] = @Id
+    
     -- Finally, delete the user
     DELETE
     FROM

util/Migrator/DbScripts/2021-01-28_00_AddDeleteSendsToUserDeleteById.sql

@@ -0,0 +1,106 @@
+IF OBJECT_ID('[dbo].[User_DeleteById]') IS NOT NULL
+BEGIN
+    DROP PROCEDURE [dbo].[User_DeleteById]
+END
+GO
+
+CREATE PROCEDURE [dbo].[User_DeleteById]
+    @Id UNIQUEIDENTIFIER
+WITH
+    RECOMPILE
+AS
+BEGIN
+    SET NOCOUNT ON
+
+DECLARE @BatchSize INT = 100
+-- Delete ciphers
+WHILE @BatchSize > 0
+BEGIN
+    BEGIN TRANSACTION User_DeleteById_Ciphers
+
+    DELETE TOP(@BatchSize)
+    FROM
+        [dbo].[Cipher]
+     WHERE
+         [UserId] = @Id
+
+    SET @BatchSize = @@ROWCOUNT
+
+    COMMIT TRANSACTION User_DeleteById_Ciphers
+END
+
+BEGIN TRANSACTION User_DeleteById
+
+-- Delete folders
+DELETE
+FROM
+    [dbo].[Folder]
+WHERE
+    [UserId] = @Id
+
+-- Delete devices
+DELETE
+FROM
+    [dbo].[Device]
+WHERE
+    [UserId] = @Id
+
+-- Delete collection users
+DELETE
+    CU
+FROM
+    [dbo].[CollectionUser] CU
+INNER JOIN
+    [dbo].[OrganizationUser] OU ON OU.[Id] = CU.[OrganizationUserId]
+WHERE
+    OU.[UserId] = @Id
+
+-- Delete group users
+DELETE
+    GU
+FROM
+    [dbo].[GroupUser] GU
+INNER JOIN
+    [dbo].[OrganizationUser] OU ON OU.[Id] = GU.[OrganizationUserId]
+WHERE
+    OU.[UserId] = @Id
+
+-- Delete organization users
+DELETE
+FROM
+    [dbo].[OrganizationUser]
+WHERE
+    [UserId] = @Id
+-- Delete U2F logins
+DELETE
+FROM
+    [dbo].[U2f]
+WHERE
+    [UserId] = @Id
+-- Delete SSO Users
+DELETE
+FROM
+    [dbo].[SsoUser]
+WHERE
+    [UserId] = @Id
+-- Delete Emergency Accesses
+DELETE
+FROM
+    [dbo].[EmergencyAccess]
+WHERE
+    [GrantorId] = @Id 
+    OR [GranteeId] = @Id
+-- Delete Sends
+DELETE
+FROM
+    [dbo].[Send]
+WHERE 
+    [UserId] = @Id
+-- Finally, delete the user
+DELETE
+FROM
+    [dbo].[User]
+WHERE
+    [Id] = @Id
+COMMIT TRANSACTION User_DeleteById
+END