[feature] Notify accounts when a status they've interacted with has been edited (#4157)

This pull request adds sending notifications to local accounts that have interacted with a status, if we receive or create a new edit for that status.

closes https://codeberg.org/superseriousbusiness/gotosocial/issues/3991
Reviewed-on: https://codeberg.org/superseriousbusiness/gotosocial/pulls/4157
Co-authored-by: tobi <tobi.smethurst@protonmail.com>
Co-committed-by: tobi <tobi.smethurst@protonmail.com>

internal/gtsmodel/interaction.go

@@ -95,3 +95,10 @@ func (ir *InteractionRequest) IsAccepted() bool {
 func (ir *InteractionRequest) IsRejected() bool {
 	return !ir.RejectedAt.IsZero()
 }
+
+// Interaction abstractly represents
+// one interaction with a status, via
+// liking, replying to, or boosting it.
+type Interaction interface {
+	GetAccount() *Account
+}

internal/gtsmodel/notification.go

@@ -32,8 +32,8 @@ type Notification struct {
 	TargetAccount    *Account         `bun:"-"`                                                           // Account corresponding to TargetAccountID. Can be nil, always check first + select using ID if necessary.
 	OriginAccountID  string           `bun:"type:CHAR(26),nullzero,notnull"`                              // ID of the account that performed the action that created the notification.
 	OriginAccount    *Account         `bun:"-"`                                                           // Account corresponding to OriginAccountID. Can be nil, always check first + select using ID if necessary.
-	StatusID         string           `bun:"type:CHAR(26),nullzero"`                                      // If the notification pertains to a status, what is the database ID of that status?
-	Status           *Status          `bun:"-"`                                                           // Status corresponding to StatusID. Can be nil, always check first + select using ID if necessary.
+	StatusOrEditID   string           `bun:"status_id,type:CHAR(26),nullzero"`                            // If the notification pertains to a status or a status edit event, what is the database ID of the status or status edit?
+	Status           *Status          `bun:"-"`                                                           // Status corresponding to StatusOrEditID. Can be nil, always check first + select using ID if necessary.
 	Read             *bool            `bun:",nullzero,notnull,default:false"`                             // Notification has been seen/read
 }
 

internal/gtsmodel/status.go

@@ -89,6 +89,13 @@ func (s *Status) GetAccountID() string {
 	return s.AccountID
 }
 
+// GetAccount returns the account that owns
+// this status. May be nil if status not populated.
+// Fulfils Interaction interface.
+func (s *Status) GetAccount() *Account {
+	return s.Account
+}
+
 // GetBoostOfID implements timeline.Timelineable{}.
 func (s *Status) GetBoostOfID() string {
 	return s.BoostOfID

internal/gtsmodel/statusfave.go

@@ -35,3 +35,10 @@ type StatusFave struct {
 	PreApproved     bool      `bun:"-"`                                                             // If true, then fave targets a status on our instance, has permission to do the interaction, and an Accept should be sent out for it immediately. Field not stored in the DB.
 	ApprovedByURI   string    `bun:",nullzero"`                                                     // URI of an Accept Activity that approves this Like.
 }
+
+// GetAccount returns the account that owns
+// this fave. May be nil if fave not populated.
+// Fulfils Interaction interface.
+func (f *StatusFave) GetAccount() *Account {
+	return f.Account
+}