[performance] convert enum strings to ints (#3558)

* convert statuses.visibility and notifications.notification_type columns from type string -> int for performance / space savings

* fix test trying to compare string to int

* fix instance count query using string literal instead of gtsmodel const type

* ensure a default value is always set

* also migrate the account settings and sin bin status tables

* initialize maps outside loops and place into singular enum mapping creation func

* use int16 for enum types

* update sinbinstatus creation to be from a snapshot at initial creation

* add snapshot of poll type at creation time

1 files changed, 45 insertions, 0 deletions

diff --git a/internal/db/bundb/migrations/20241121121623_enum_strings_to_ints/accountsettings.go b/internal/db/bundb/migrations/20241121121623_enum_strings_to_ints/accountsettings.go
new file mode 100644
index 000000000..9a9cfd8e1
--- /dev/null
+++ b/internal/db/bundb/migrations/20241121121623_enum_strings_to_ints/accountsettings.go
@@ -0,0 +1,45 @@
+// GoToSocial
+// Copyright (C) GoToSocial Authors admin@gotosocial.org
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package gtsmodel
+
+import (
+	"time"
+
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+// AccountSettings models settings / preferences for a local, non-instance account.
+type AccountSettings struct {
+	AccountID                      string                      `bun:"type:CHAR(26),pk,nullzero,notnull,unique"`                    // AccountID that owns this settings.
+	CreatedAt                      time.Time                   `bun:"type:timestamptz,nullzero,notnull,default:current_timestamp"` // when was item created.
+	UpdatedAt                      time.Time                   `bun:"type:timestamptz,nullzero,notnull,default:current_timestamp"` // when was item was last updated.
+	Privacy                        Visibility                  `bun:",nullzero,default:3"`                                         // Default post privacy for this account
+	Sensitive                      *bool                       `bun:",nullzero,notnull,default:false"`                             // Set posts from this account to sensitive by default?
+	Language                       string                      `bun:",nullzero,notnull,default:'en'"`                              // What language does this account post in?
+	StatusContentType              string                      `bun:",nullzero"`                                                   // What is the default format for statuses posted by this account (only for local accounts).
+	Theme                          string                      `bun:",nullzero"`                                                   // Preset CSS theme filename selected by this Account (empty string if nothing set).
+	CustomCSS                      string                      `bun:",nullzero"`                                                   // Custom CSS that should be displayed for this Account's profile and statuses.
+	EnableRSS                      *bool                       `bun:",nullzero,notnull,default:false"`                             // enable RSS feed subscription for this account's public posts at [URL]/feed
+	HideCollections                *bool                       `bun:",nullzero,notnull,default:false"`                             // Hide this account's followers/following collections.
+	WebVisibility                  Visibility                  `bun:",nullzero,notnull,default:3"`                                 // Visibility level of statuses that visitors can view via the web profile.
+	InteractionPolicyDirect        *gtsmodel.InteractionPolicy `bun:""`                                                            // Interaction policy to use for new direct visibility statuses by this account. If null, assume default policy.
+	InteractionPolicyMutualsOnly   *gtsmodel.InteractionPolicy `bun:""`                                                            // Interaction policy to use for new mutuals only visibility statuses. If null, assume default policy.
+	InteractionPolicyFollowersOnly *gtsmodel.InteractionPolicy `bun:""`                                                            // Interaction policy to use for new followers only visibility statuses. If null, assume default policy.
+	InteractionPolicyUnlocked      *gtsmodel.InteractionPolicy `bun:""`                                                            // Interaction policy to use for new unlocked visibility statuses. If null, assume default policy.
+	InteractionPolicyPublic        *gtsmodel.InteractionPolicy `bun:""`                                                            // Interaction policy to use for new public visibility statuses. If null, assume default policy.
+}