Timeline manager (#40)

* start messing about with timeline manager

* i have no idea what i'm doing

* i continue to not know what i'm doing

* it's coming along

* bit more progress

* update timeline with new posts as they come in

* lint and fmt

* Select accounts where empty string

* restructure a bunch, get unfaves working

* moving stuff around

* federate status deletes properly

* mention regex better but not 100% there

* fix regex

* some more hacking away at the timeline code phew

* fix up some little things

* i can't even

* more timeline stuff

* move to ulid

* fiddley

* some lil fixes for kibou compatibility

* timelines working pretty alright!

* tidy + lint

1 files changed, 79 insertions, 0 deletions

diff --git a/internal/processing/synchronous/status/boost.go b/internal/processing/synchronous/status/boost.go
new file mode 100644
index 000000000..a746e9fd8
--- /dev/null
+++ b/internal/processing/synchronous/status/boost.go
@@ -0,0 +1,79 @@
+package status
+
+import (
+	"errors"
+	"fmt"
+
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+func (p *processor) Boost(account *gtsmodel.Account, application *gtsmodel.Application, targetStatusID string) (*apimodel.Status, gtserror.WithCode) {
+	l := p.log.WithField("func", "StatusBoost")
+
+	l.Tracef("going to search for target status %s", targetStatusID)
+	targetStatus := &gtsmodel.Status{}
+	if err := p.db.GetByID(targetStatusID, targetStatus); err != nil {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("error fetching status %s: %s", targetStatusID, err))
+	}
+
+	l.Tracef("going to search for target account %s", targetStatus.AccountID)
+	targetAccount := &gtsmodel.Account{}
+	if err := p.db.GetByID(targetStatus.AccountID, targetAccount); err != nil {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("error fetching target account %s: %s", targetStatus.AccountID, err))
+	}
+
+	l.Trace("going to get relevant accounts")
+	relevantAccounts, err := p.db.PullRelevantAccountsFromStatus(targetStatus)
+	if err != nil {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("error fetching related accounts for status %s: %s", targetStatusID, err))
+	}
+
+	l.Trace("going to see if status is visible")
+	visible, err := p.db.StatusVisible(targetStatus, account, relevantAccounts)
+	if err != nil {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("error seeing if status %s is visible: %s", targetStatus.ID, err))
+	}
+
+	if !visible {
+		return nil, gtserror.NewErrorNotFound(errors.New("status is not visible"))
+	}
+
+	if targetStatus.VisibilityAdvanced != nil {
+		if !targetStatus.VisibilityAdvanced.Boostable {
+			return nil, gtserror.NewErrorForbidden(errors.New("status is not boostable"))
+		}
+	}
+
+	// it's visible! it's boostable! so let's boost the FUCK out of it
+	boostWrapperStatus, err := p.tc.StatusToBoost(targetStatus, account)
+	if err != nil {
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	boostWrapperStatus.CreatedWithApplicationID = application.ID
+	boostWrapperStatus.GTSBoostedAccount = targetAccount
+
+	// put the boost in the database
+	if err := p.db.Put(boostWrapperStatus); err != nil {
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	// send it back to the processor for async processing
+	p.fromClientAPI <- gtsmodel.FromClientAPI{
+		APObjectType:   gtsmodel.ActivityStreamsAnnounce,
+		APActivityType: gtsmodel.ActivityStreamsCreate,
+		GTSModel:       boostWrapperStatus,
+		OriginAccount:  account,
+		TargetAccount:  targetAccount,
+	}
+
+	// return the frontend representation of the new status to the submitter
+	mastoStatus, err := p.tc.StatusToMasto(boostWrapperStatus, account, account, targetAccount, nil, targetStatus)
+	if err != nil {
+		return nil, gtserror.NewErrorInternalError(fmt.Errorf("error converting status %s to frontend representation: %s", targetStatus.ID, err))
+	}
+
+	return mastoStatus, nil
+}