[feature] Add List functionality (#1802)

* start working on lists

* further list work

* test list db functions nicely

* more work on lists

* peepoopeepoo

* poke

* start list timeline func

* we're getting there lads

* couldn't be me working on stuff... could it?

* hook up handlers

* fiddling

* weeee

* woah

* screaming, pissing

* fix streaming being a whiny baby

* lint, small test fix, swagger

* tidying up, testing

* fucked! by the linter

* move timelines to state like a boss

* add timeline start to tests using state

* invalidate lists

1 files changed, 73 insertions, 0 deletions

diff --git a/internal/processing/timeline/faved.go b/internal/processing/timeline/faved.go
new file mode 100644
index 000000000..0fc92d8fa
--- /dev/null
+++ b/internal/processing/timeline/faved.go
@@ -0,0 +1,73 @@
+// 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 timeline
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/log"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
+)
+
+func (p *Processor) FavedTimelineGet(ctx context.Context, authed *oauth.Auth, maxID string, minID string, limit int) (*apimodel.PageableResponse, gtserror.WithCode) {
+	statuses, nextMaxID, prevMinID, err := p.state.DB.GetFavedTimeline(ctx, authed.Account.ID, maxID, minID, limit)
+	if err != nil && !errors.Is(err, db.ErrNoEntries) {
+		err = fmt.Errorf("FavedTimelineGet: db error getting statuses: %w", err)
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	count := len(statuses)
+	if count == 0 {
+		return util.EmptyPageableResponse(), nil
+	}
+
+	items := make([]interface{}, 0, count)
+	for _, s := range statuses {
+		visible, err := p.filter.StatusVisible(ctx, authed.Account, s)
+		if err != nil {
+			log.Debugf(ctx, "skipping status %s because of an error checking status visibility: %s", s.ID, err)
+			continue
+		}
+
+		if !visible {
+			continue
+		}
+
+		apiStatus, err := p.tc.StatusToAPIStatus(ctx, s, authed.Account)
+		if err != nil {
+			log.Debugf(ctx, "skipping status %s because it couldn't be converted to its api representation: %s", s.ID, err)
+			continue
+		}
+
+		items = append(items, apiStatus)
+	}
+
+	return util.PackagePageableResponse(util.PageableResponseParams{
+		Items:          items,
+		Path:           "api/v1/favourites",
+		NextMaxIDValue: nextMaxID,
+		PrevMinIDValue: prevMinID,
+		Limit:          limit,
+	})
+}