Federated user activity following: Isolated model changes (#8078)

This PR is part of https://codeberg.org/forgejo/forgejo/pulls/4767

This should not have an outside impact but bring all model changes needed & bring migrations.

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/8078
Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org>
Co-authored-by: Michael Jerger <michael.jerger@meissa-gmbh.de>
Co-committed-by: Michael Jerger <michael.jerger@meissa-gmbh.de>

models/activities/federated_user_activity.go

@@ -0,0 +1,106 @@
+// Copyright 2024 The Forgejo Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package activities
+
+import (
+	"context"
+	"fmt"
+
+	"forgejo.org/models/db"
+	user_model "forgejo.org/models/user"
+	"forgejo.org/modules/json"
+	"forgejo.org/modules/log"
+	"forgejo.org/modules/timeutil"
+	"forgejo.org/modules/validation"
+
+	ap "github.com/go-ap/activitypub"
+)
+
+type FederatedUserActivity struct {
+	ID           int64 `xorm:"pk autoincr"`
+	UserID       int64 `xorm:"NOT NULL"`
+	ActorID      int64
+	ActorURI     string
+	Actor        *user_model.User   `xorm:"-"` // transient
+	NoteContent  string             `xorm:"TEXT"`
+	NoteURL      string             `xorm:"VARCHAR(255)"`
+	OriginalNote string             `xorm:"TEXT"`
+	Created      timeutil.TimeStamp `xorm:"created"`
+}
+
+func init() {
+	db.RegisterModel(new(FederatedUserActivity))
+}
+
+func NewFederatedUserActivity(userID, actorID int64, actorURI, noteContent, noteURL string, originalNote ap.Activity) (FederatedUserActivity, error) {
+	jsonString, err := json.Marshal(originalNote)
+	if err != nil {
+		return FederatedUserActivity{}, err
+	}
+	result := FederatedUserActivity{
+		UserID:       userID,
+		ActorID:      actorID,
+		ActorURI:     actorURI,
+		NoteContent:  noteContent,
+		NoteURL:      noteURL,
+		OriginalNote: string(jsonString),
+	}
+	if valid, err := validation.IsValid(result); !valid {
+		return FederatedUserActivity{}, err
+	}
+	return result, nil
+}
+
+func (federatedUserActivity FederatedUserActivity) Validate() []string {
+	var result []string
+	result = append(result, validation.ValidateNotEmpty(federatedUserActivity.UserID, "UserID")...)
+	result = append(result, validation.ValidateNotEmpty(federatedUserActivity.ActorID, "ActorID")...)
+	result = append(result, validation.ValidateNotEmpty(federatedUserActivity.ActorURI, "ActorURI")...)
+	result = append(result, validation.ValidateNotEmpty(federatedUserActivity.NoteContent, "NoteContent")...)
+	result = append(result, validation.ValidateNotEmpty(federatedUserActivity.NoteURL, "NoteURL")...)
+	result = append(result, validation.ValidateNotEmpty(federatedUserActivity.OriginalNote, "OriginalNote")...)
+	return result
+}
+
+func CreateUserActivity(ctx context.Context, federatedUserActivity *FederatedUserActivity) error {
+	if valid, err := validation.IsValid(federatedUserActivity); !valid {
+		return err
+	}
+	_, err := db.GetEngine(ctx).Insert(federatedUserActivity)
+	return err
+}
+
+type GetFollowingFeedsOptions struct {
+	db.ListOptions
+}
+
+func GetFollowingFeeds(ctx context.Context, actorID int64, opts GetFollowingFeedsOptions) ([]*FederatedUserActivity, int64, error) {
+	log.Debug("user_id = %s", actorID)
+	sess := db.GetEngine(ctx).Where("user_id = ?", actorID)
+	opts.SetDefaultValues()
+	sess = db.SetSessionPagination(sess, &opts)
+
+	actions := make([]*FederatedUserActivity, 0, opts.PageSize)
+	count, err := sess.FindAndCount(&actions)
+	if err != nil {
+		return nil, 0, fmt.Errorf("FindAndCount: %w", err)
+	}
+	for _, act := range actions {
+		if err := act.loadActor(ctx); err != nil {
+			return nil, 0, err
+		}
+	}
+	return actions, count, err
+}
+
+func (federatedUserActivity *FederatedUserActivity) loadActor(ctx context.Context) error {
+	log.Debug("for activity %s", federatedUserActivity)
+	actorUser, _, err := user_model.GetFederatedUserByUserID(ctx, federatedUserActivity.ActorID)
+	if err != nil {
+		return err
+	}
+	federatedUserActivity.Actor = actorUser
+
+	return nil
+}