[chore] move status filtering from type converter (#4306)

This finalizes the moving status filtering out of the type converter, and into its own `./internal/filter/` subpkg :)

Reviewed-on: https://codeberg.org/superseriousbusiness/gotosocial/pulls/4306
Co-authored-by: kim <grufwub@gmail.com>
Co-committed-by: kim <grufwub@gmail.com>

5 files changed, 76 insertions, 58 deletions

diff --git a/internal/processing/conversations/conversations.go b/internal/processing/conversations/conversations.go
index 70fafa437..b80ba659a 100644
--- a/internal/processing/conversations/conversations.go
+++ b/internal/processing/conversations/conversations.go
@@ -23,6 +23,7 @@ import (
 
 	"code.superseriousbusiness.org/gotosocial/internal/db"
 	"code.superseriousbusiness.org/gotosocial/internal/filter/mutes"
+	"code.superseriousbusiness.org/gotosocial/internal/filter/status"
 	"code.superseriousbusiness.org/gotosocial/internal/filter/visibility"
 	"code.superseriousbusiness.org/gotosocial/internal/gtserror"
 	"code.superseriousbusiness.org/gotosocial/internal/gtsmodel"
@@ -31,10 +32,11 @@ import (
 )
 
 type Processor struct {
-	state      *state.State
-	converter  *typeutils.Converter
-	visFilter  *visibility.Filter
-	muteFilter *mutes.Filter
+	state        *state.State
+	converter    *typeutils.Converter
+	visFilter    *visibility.Filter
+	muteFilter   *mutes.Filter
+	statusFilter *status.Filter
 }
 
 func New(
@@ -42,12 +44,14 @@ func New(
 	converter *typeutils.Converter,
 	visFilter *visibility.Filter,
 	muteFilter *mutes.Filter,
+	statusFilter *status.Filter,
 ) Processor {
 	return Processor{
-		state:      state,
-		converter:  converter,
-		visFilter:  visFilter,
-		muteFilter: muteFilter,
+		state:        state,
+		converter:    converter,
+		visFilter:    visFilter,
+		muteFilter:   muteFilter,
+		statusFilter: statusFilter,
 	}
 }
 
@@ -95,21 +99,3 @@ func (p *Processor) getConversationOwnedBy(
 
 	return conversation, nil
 }
-
-// getFiltersAndMutes gets the given account's filters and compiled mute list.
-func (p *Processor) getFilters(
-	ctx context.Context,
-	requestingAccount *gtsmodel.Account,
-) ([]*gtsmodel.Filter, gtserror.WithCode) {
-	filters, err := p.state.DB.GetFiltersByAccountID(ctx, requestingAccount.ID)
-	if err != nil {
-		return nil, gtserror.NewErrorInternalError(
-			gtserror.Newf(
-				"DB error getting filters for account %s: %w",
-				requestingAccount.ID,
-				err,
-			),
-		)
-	}
-	return filters, nil
-}
diff --git a/internal/processing/conversations/conversations_test.go b/internal/processing/conversations/conversations_test.go
index 383938564..407623964 100644
--- a/internal/processing/conversations/conversations_test.go
+++ b/internal/processing/conversations/conversations_test.go
@@ -28,6 +28,7 @@ import (
 	"code.superseriousbusiness.org/gotosocial/internal/email"
 	"code.superseriousbusiness.org/gotosocial/internal/federation"
 	"code.superseriousbusiness.org/gotosocial/internal/filter/mutes"
+	"code.superseriousbusiness.org/gotosocial/internal/filter/status"
 	"code.superseriousbusiness.org/gotosocial/internal/filter/visibility"
 	"code.superseriousbusiness.org/gotosocial/internal/gtsmodel"
 	"code.superseriousbusiness.org/gotosocial/internal/log"
@@ -118,7 +119,7 @@ func (suite *ConversationsTestSuite) SetupTest() {
 	suite.sentEmails = make(map[string]string)
 	suite.emailSender = testrig.NewEmailSender("../../../web/template/", suite.sentEmails)
 
-	suite.conversationsProcessor = conversations.New(&suite.state, suite.tc, suite.visFilter, suite.muteFilter)
+	suite.conversationsProcessor = conversations.New(&suite.state, suite.tc, suite.visFilter, suite.muteFilter, status.NewFilter(&suite.state))
 	testrig.StandardDBSetup(suite.db, nil)
 	testrig.StandardStorageSetup(suite.storage, "../../../testrig/media")
 
diff --git a/internal/processing/conversations/get.go b/internal/processing/conversations/get.go
index 5324466c9..cdc0756c3 100644
--- a/internal/processing/conversations/get.go
+++ b/internal/processing/conversations/get.go
@@ -64,17 +64,26 @@ func (p *Processor) GetAll(
 
 	items := make([]interface{}, 0, count)
 
-	filters, errWithCode := p.getFilters(ctx, requestingAccount)
-	if errWithCode != nil {
-		return nil, errWithCode
-	}
-
 	for _, conversation := range conversations {
+		// Check whether status if filtered by local participant in context.
+		filtered, hide, err := p.statusFilter.StatusFilterResultsInContext(ctx,
+			requestingAccount,
+			conversation.LastStatus,
+			gtsmodel.FilterContextNotifications,
+		)
+		if err != nil {
+			log.Errorf(ctx, "error filtering status: %v", err)
+			continue
+		}
+
+		if hide {
+			continue
+		}
+
 		// Convert conversation to frontend API model.
 		apiConversation, err := p.converter.ConversationToAPIConversation(ctx,
 			conversation,
 			requestingAccount,
-			filters,
 		)
 		if err != nil {
 			log.Errorf(ctx,
@@ -85,6 +94,9 @@ func (p *Processor) GetAll(
 			continue
 		}
 
+		// Set filter results on attached status model.
+		apiConversation.LastStatus.Filtered = filtered
+
 		// Append conversation to return items.
 		items = append(items, apiConversation)
 	}
diff --git a/internal/processing/conversations/read.go b/internal/processing/conversations/read.go
index 4d16a4eeb..c7e4f1acd 100644
--- a/internal/processing/conversations/read.go
+++ b/internal/processing/conversations/read.go
@@ -23,6 +23,7 @@ import (
 	apimodel "code.superseriousbusiness.org/gotosocial/internal/api/model"
 	"code.superseriousbusiness.org/gotosocial/internal/gtserror"
 	"code.superseriousbusiness.org/gotosocial/internal/gtsmodel"
+	"code.superseriousbusiness.org/gotosocial/internal/log"
 	"code.superseriousbusiness.org/gotosocial/internal/util"
 )
 
@@ -44,20 +45,27 @@ func (p *Processor) Read(
 		return nil, gtserror.NewErrorInternalError(err)
 	}
 
-	filters, errWithCode := p.getFilters(ctx, requestingAccount)
-	if errWithCode != nil {
-		return nil, errWithCode
+	// Check whether status if filtered by local participant in context.
+	filtered, _, err := p.statusFilter.StatusFilterResultsInContext(ctx,
+		requestingAccount,
+		conversation.LastStatus,
+		gtsmodel.FilterContextNotifications,
+	)
+	if err != nil {
+		log.Errorf(ctx, "error filtering status: %v", err)
 	}
 
 	apiConversation, err := p.converter.ConversationToAPIConversation(ctx,
 		conversation,
 		requestingAccount,
-		filters,
 	)
 	if err != nil {
 		err = gtserror.Newf("error converting conversation %s to API representation: %w", id, err)
 		return nil, gtserror.NewErrorInternalError(err)
 	}
 
+	// Set filter results on attached status model.
+	apiConversation.LastStatus.Filtered = filtered
+
 	return apiConversation, nil
 }
diff --git a/internal/processing/conversations/update.go b/internal/processing/conversations/update.go
index cf81d6906..21f1cf915 100644
--- a/internal/processing/conversations/update.go
+++ b/internal/processing/conversations/update.go
@@ -27,7 +27,6 @@ import (
 	"code.superseriousbusiness.org/gotosocial/internal/gtsmodel"
 	"code.superseriousbusiness.org/gotosocial/internal/id"
 	"code.superseriousbusiness.org/gotosocial/internal/log"
-	"code.superseriousbusiness.org/gotosocial/internal/typeutils"
 	"code.superseriousbusiness.org/gotosocial/internal/util"
 )
 
@@ -158,26 +157,6 @@ func (p *Processor) UpdateConversationsForStatus(ctx context.Context, status *gt
 			continue
 		}
 
-		// Convert the conversation to API representation.
-		apiConversation, err := p.converter.ConversationToAPIConversation(ctx,
-			conversation,
-			localAccount,
-			nil,
-		)
-		if err != nil {
-			// If the conversation's last status matched a hide filter, skip it.
-			// If there was another kind of error, log that and skip it anyway.
-			if !errors.Is(err, typeutils.ErrHideStatus) {
-				log.Errorf(ctx,
-					"error converting conversation %s to API representation for account %s: %v",
-					status.ID,
-					localAccount.ID,
-					err,
-				)
-			}
-			continue
-		}
-
 		// If status was authored by this participant,
 		// don't bother notifying, they already know!
 		if status.AccountID == localAccount.ID {
@@ -198,6 +177,38 @@ func (p *Processor) UpdateConversationsForStatus(ctx context.Context, status *gt
 			continue
 		}
 
+		// Check whether status if filtered by local participant in context.
+		filtered, hide, err := p.statusFilter.StatusFilterResultsInContext(ctx,
+			localAccount,
+			status,
+			gtsmodel.FilterContextNotifications,
+		)
+		if err != nil {
+			log.Errorf(ctx, "error filtering status: %v", err)
+			continue
+		}
+
+		if hide {
+			continue
+		}
+
+		// Convert the conversation to API representation.
+		apiConversation, err := p.converter.ConversationToAPIConversation(ctx,
+			conversation,
+			localAccount,
+		)
+		if err != nil {
+			log.Errorf(ctx, "error converting conversation %s to API representation for account %s: %v",
+				status.ID,
+				localAccount.ID,
+				err,
+			)
+			continue
+		}
+
+		// Set filter results on attached status model.
+		apiConversation.LastStatus.Filtered = filtered
+
 		// Generate a notification,
 		notifications = append(notifications, ConversationNotification{
 			AccountID:    localAccount.ID,