[feature] Allow user to choose "gallery" style layout for web view of profile (#3917)

* [feature] Allow user to choose "gallery" style web layout

* find a bug and squish it up and all day long you'll have good luck

* just a sec

* [performance] reindex public timeline + tinker with query a bit

* fiddling

* should be good now

* last bit of finagling, i'm done now i prommy

* panic normally

1 files changed, 85 insertions, 0 deletions

diff --git a/internal/db/bundb/migrations/20250314120945_add_gallery_web_layout.go b/internal/db/bundb/migrations/20250314120945_add_gallery_web_layout.go
new file mode 100644
index 000000000..64b133cd5
--- /dev/null
+++ b/internal/db/bundb/migrations/20250314120945_add_gallery_web_layout.go
@@ -0,0 +1,85 @@
+// 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 migrations
+
+import (
+	"context"
+
+	"github.com/superseriousbusiness/gotosocial/internal/log"
+	"github.com/uptrace/bun"
+)
+
+func init() {
+	up := func(ctx context.Context, db *bun.DB) error {
+		return db.RunInTx(ctx, nil, func(ctx context.Context, tx bun.Tx) error {
+
+			// Add new column to settings.
+			if _, err := tx.
+				NewAddColumn().
+				Table("account_settings").
+				ColumnExpr(
+					"? SMALLINT NOT NULL DEFAULT ?",
+					bun.Ident("web_layout"), 1,
+				).
+				Exec(ctx); err != nil {
+				return err
+			}
+
+			// Drop existing statuses web index as it's out of date.
+			log.Info(ctx, "updating statuses_profile_web_view_idx, this may take a while, please wait!")
+			if _, err := tx.
+				NewDropIndex().
+				Index("statuses_profile_web_view_idx").
+				IfExists().
+				Exec(ctx); err != nil {
+				return err
+			}
+
+			// Note: "attachments" field is not included in
+			// the index below as SQLite is fussy about using it,
+			// and it prevents this index from being used
+			// properly in non media-only queries.
+			if _, err := tx.
+				NewCreateIndex().
+				Table("statuses").
+				Index("statuses_profile_web_view_idx").
+				Column(
+					"account_id",
+					"visibility",
+					"in_reply_to_uri",
+					"boost_of_id",
+					"federated",
+				).
+				ColumnExpr("? DESC", bun.Ident("id")).
+				IfNotExists().
+				Exec(ctx); err != nil {
+				return err
+			}
+
+			return nil
+		})
+	}
+
+	down := func(ctx context.Context, db *bun.DB) error {
+		return nil
+	}
+
+	if err := Migrations.Register(up, down); err != nil {
+		panic(err)
+	}
+}