[feature] Interaction requests client api + settings panel (#3215)

* [feature] Interaction requests client api + settings panel

* test accept / reject

* fmt

* don't pin rejected interaction

* use single db model for interaction accept, reject, and request

* swaggor

* env sharting

* append errors

* remove ErrNoEntries checks

* change intReqID to reqID

* rename "pend" to "request"

* markIntsPending -> mark interactionsPending

* use log instead of returning error when rejecting interaction

* empty migration

* jolly renaming

* make interactionURI unique again

* swag grr

* remove unnecessary locks

* invalidate as last step

1 files changed, 93 insertions, 0 deletions

diff --git a/internal/gtsmodel/interaction.go b/internal/gtsmodel/interaction.go
new file mode 100644
index 000000000..562b752eb
--- /dev/null
+++ b/internal/gtsmodel/interaction.go
@@ -0,0 +1,93 @@
+// 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 gtsmodel
+
+import "time"
+
+// Like / Reply / Announce
+type InteractionType int
+
+const (
+	// WARNING: DO NOT CHANGE THE ORDER OF THESE,
+	// as this will cause breakage of approvals!
+	//
+	// If you need to add new interaction types,
+	// add them *to the end* of the list.
+
+	InteractionLike InteractionType = iota
+	InteractionReply
+	InteractionAnnounce
+)
+
+// Stringifies this InteractionType in a
+// manner suitable for serving via the API.
+func (i InteractionType) String() string {
+	switch i {
+	case InteractionLike:
+		const text = "favourite"
+		return text
+	case InteractionReply:
+		const text = "reply"
+		return text
+	case InteractionAnnounce:
+		const text = "reblog"
+		return text
+	default:
+		panic("undefined InteractionType")
+	}
+}
+
+// InteractionRequest represents one interaction (like, reply, fave)
+// that is either accepted, rejected, or currently still awaiting
+// acceptance or rejection by the target account.
+type InteractionRequest struct {
+	ID                   string          `bun:"type:CHAR(26),pk,nullzero,notnull,unique"`                    // id of this item in the database
+	CreatedAt            time.Time       `bun:"type:timestamptz,nullzero,notnull,default:current_timestamp"` // when was item created
+	StatusID             string          `bun:"type:CHAR(26),nullzero,notnull"`                              // ID of the interaction target status.
+	Status               *Status         `bun:"-"`                                                           // Not stored in DB. Status being interacted with.
+	TargetAccountID      string          `bun:"type:CHAR(26),nullzero,notnull"`                              // id of the account being interacted with
+	TargetAccount        *Account        `bun:"-"`                                                           // Not stored in DB. Account being interacted with.
+	InteractingAccountID string          `bun:"type:CHAR(26),nullzero,notnull"`                              // id of the account requesting the interaction.
+	InteractingAccount   *Account        `bun:"-"`                                                           // Not stored in DB. Account corresponding to targetAccountID
+	InteractionURI       string          `bun:",nullzero,notnull,unique"`                                    // URI of the interacting like, reply, or announce. Unique (only one interaction request allowed per interaction URI).
+	InteractionType      InteractionType `bun:",notnull"`                                                    // One of Like, Reply, or Announce.
+	Like                 *StatusFave     `bun:"-"`                                                           // Not stored in DB. Only set if InteractionType = InteractionLike.
+	Reply                *Status         `bun:"-"`                                                           // Not stored in DB. Only set if InteractionType = InteractionReply.
+	Announce             *Status         `bun:"-"`                                                           // Not stored in DB. Only set if InteractionType = InteractionAnnounce.
+	URI                  string          `bun:",nullzero,unique"`                                            // ActivityPub URI of the Accept (if accepted) or Reject (if rejected). Null/empty if currently neither accepted not rejected.
+	AcceptedAt           time.Time       `bun:"type:timestamptz,nullzero"`                                   // If interaction request was accepted, time at which this occurred.
+	RejectedAt           time.Time       `bun:"type:timestamptz,nullzero"`                                   // If interaction request was rejected, time at which this occurred.
+}
+
+// IsHandled returns true if interaction
+// request has been neither accepted or rejected.
+func (ir *InteractionRequest) IsPending() bool {
+	return ir.URI == "" && ir.AcceptedAt.IsZero() && ir.RejectedAt.IsZero()
+}
+
+// IsAccepted returns true if this
+// interaction request has been accepted.
+func (ir *InteractionRequest) IsAccepted() bool {
+	return ir.URI != "" && !ir.AcceptedAt.IsZero()
+}
+
+// IsRejected returns true if this
+// interaction request has been rejected.
+func (ir *InteractionRequest) IsRejected() bool {
+	return ir.URI != "" && !ir.RejectedAt.IsZero()
+}