[feature] Implement exclusive lists (#3280)

Fixes #2616

internal/processing/list/create.go

@@ -30,12 +30,19 @@ import (
 
 // Create creates one a new list for the given account, using the provided parameters.
 // These params should have already been validated by the time they reach this function.
-func (p *Processor) Create(ctx context.Context, account *gtsmodel.Account, title string, repliesPolicy gtsmodel.RepliesPolicy) (*apimodel.List, gtserror.WithCode) {
+func (p *Processor) Create(
+	ctx context.Context,
+	account *gtsmodel.Account,
+	title string,
+	repliesPolicy gtsmodel.RepliesPolicy,
+	exclusive bool,
+) (*apimodel.List, gtserror.WithCode) {
 	list := &gtsmodel.List{
 		ID:            id.NewULID(),
 		Title:         title,
 		AccountID:     account.ID,
 		RepliesPolicy: repliesPolicy,
+		Exclusive:     &exclusive,
 	}
 
 	if err := p.state.DB.PutList(ctx, list); err != nil {

internal/processing/list/get.go

@@ -47,7 +47,7 @@ func (p *Processor) Get(ctx context.Context, account *gtsmodel.Account, id strin
 	return p.apiList(ctx, list)
 }
 
-// GetMultiple returns multiple lists created by the given account, sorted by list ID DESC (newest first).
+// GetAll returns multiple lists created by the given account, sorted by list ID DESC (newest first).
 func (p *Processor) GetAll(ctx context.Context, account *gtsmodel.Account) ([]*apimodel.List, gtserror.WithCode) {
 	lists, err := p.state.DB.GetListsForAccountID(
 		// Use barebones ctx; no embedded

internal/processing/list/update.go

@@ -36,6 +36,7 @@ func (p *Processor) Update(
 	id string,
 	title *string,
 	repliesPolicy *gtsmodel.RepliesPolicy,
+	exclusive *bool,
 ) (*apimodel.List, gtserror.WithCode) {
 	list, errWithCode := p.getList(
 		// Use barebones ctx; no embedded
@@ -49,7 +50,7 @@ func (p *Processor) Update(
 	}
 
 	// Only update columns we're told to update.
-	columns := make([]string, 0, 2)
+	columns := make([]string, 0, 3)
 
 	if title != nil {
 		list.Title = *title
@@ -61,6 +62,11 @@ func (p *Processor) Update(
 		columns = append(columns, "replies_policy")
 	}
 
+	if exclusive != nil {
+		list.Exclusive = exclusive
+		columns = append(columns, "exclusive")
+	}
+
 	if err := p.state.DB.UpdateList(ctx, list, columns...); err != nil {
 		if errors.Is(err, db.ErrAlreadyExists) {
 			err = errors.New("you already have a list with this title")