gtsocial-umbx

relationship_follow.go (8616B)

---

 // 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 bundb
 
 import (
 	"context"
 	"errors"
 	"fmt"
 	"time"
 
 	"github.com/superseriousbusiness/gotosocial/internal/db"
 	"github.com/superseriousbusiness/gotosocial/internal/gtscontext"
 	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
 	"github.com/superseriousbusiness/gotosocial/internal/log"
 	"github.com/uptrace/bun"
 )
 
 func (r *relationshipDB) GetFollowByID(ctx context.Context, id string) (*gtsmodel.Follow, error) {
 	return r.getFollow(
 		ctx,
 		"ID",
 		func(follow *gtsmodel.Follow) error {
 			return r.conn.NewSelect().
 				Model(follow).
 				Where("? = ?", bun.Ident("id"), id).
 				Scan(ctx)
 		},
 		id,
 	)
 }
 
 func (r *relationshipDB) GetFollowByURI(ctx context.Context, uri string) (*gtsmodel.Follow, error) {
 	return r.getFollow(
 		ctx,
 		"URI",
 		func(follow *gtsmodel.Follow) error {
 			return r.conn.NewSelect().
 				Model(follow).
 				Where("? = ?", bun.Ident("uri"), uri).
 				Scan(ctx)
 		},
 		uri,
 	)
 }
 
 func (r *relationshipDB) GetFollow(ctx context.Context, sourceAccountID string, targetAccountID string) (*gtsmodel.Follow, error) {
 	return r.getFollow(
 		ctx,
 		"AccountID.TargetAccountID",
 		func(follow *gtsmodel.Follow) error {
 			return r.conn.NewSelect().
 				Model(follow).
 				Where("? = ?", bun.Ident("account_id"), sourceAccountID).
 				Where("? = ?", bun.Ident("target_account_id"), targetAccountID).
 				Scan(ctx)
 		},
 		sourceAccountID,
 		targetAccountID,
 	)
 }
 
 func (r *relationshipDB) GetFollowsByIDs(ctx context.Context, ids []string) ([]*gtsmodel.Follow, error) {
 	// Preallocate slice of expected length.
 	follows := make([]*gtsmodel.Follow, 0, len(ids))
 
 	for _, id := range ids {
 		// Fetch follow model for this ID.
 		follow, err := r.GetFollowByID(ctx, id)
 		if err != nil {
 			log.Errorf(ctx, "error getting follow %q: %v", id, err)
 			continue
 		}
 
 		// Append to return slice.
 		follows = append(follows, follow)
 	}
 
 	return follows, nil
 }
 
 func (r *relationshipDB) IsFollowing(ctx context.Context, sourceAccountID string, targetAccountID string) (bool, db.Error) {
 	follow, err := r.GetFollow(
 		gtscontext.SetBarebones(ctx),
 		sourceAccountID,
 		targetAccountID,
 	)
 	if err != nil && !errors.Is(err, db.ErrNoEntries) {
 		return false, err
 	}
 	return (follow != nil), nil
 }
 
 func (r *relationshipDB) IsMutualFollowing(ctx context.Context, accountID1 string, accountID2 string) (bool, db.Error) {
 	// make sure account 1 follows account 2
 	f1, err := r.IsFollowing(ctx,
 		accountID1,
 		accountID2,
 	)
 	if !f1 /* f1 = false when err != nil */ {
 		return false, err
 	}
 
 	// make sure account 2 follows account 1
 	f2, err := r.IsFollowing(ctx,
 		accountID2,
 		accountID1,
 	)
 	if !f2 /* f2 = false when err != nil */ {
 		return false, err
 	}
 
 	return true, nil
 }
 
 func (r *relationshipDB) getFollow(ctx context.Context, lookup string, dbQuery func(*gtsmodel.Follow) error, keyParts ...any) (*gtsmodel.Follow, error) {
 	// Fetch follow from database cache with loader callback
 	follow, err := r.state.Caches.GTS.Follow().Load(lookup, func() (*gtsmodel.Follow, error) {
 		var follow gtsmodel.Follow
 
 		// Not cached! Perform database query
 		if err := dbQuery(&follow); err != nil {
 			return nil, r.conn.ProcessError(err)
 		}
 
 		return &follow, nil
 	}, keyParts...)
 	if err != nil {
 		// error already processed
 		return nil, err
 	}
 
 	if gtscontext.Barebones(ctx) {
 		// Only a barebones model was requested.
 		return follow, nil
 	}
 
 	if err := r.state.DB.PopulateFollow(ctx, follow); err != nil {
 		return nil, err
 	}
 
 	return follow, nil
 }
 
 func (r *relationshipDB) PopulateFollow(ctx context.Context, follow *gtsmodel.Follow) error {
 	var (
 		err  error
 		errs = make(gtserror.MultiError, 0, 2)
 	)
 
 	if follow.Account == nil {
 		// Follow account is not set, fetch from the database.
 		follow.Account, err = r.state.DB.GetAccountByID(
 			gtscontext.SetBarebones(ctx),
 			follow.AccountID,
 		)
 		if err != nil {
 			errs.Append(fmt.Errorf("error populating follow account: %w", err))
 		}
 	}
 
 	if follow.TargetAccount == nil {
 		// Follow target account is not set, fetch from the database.
 		follow.TargetAccount, err = r.state.DB.GetAccountByID(
 			gtscontext.SetBarebones(ctx),
 			follow.TargetAccountID,
 		)
 		if err != nil {
 			errs.Append(fmt.Errorf("error populating follow target account: %w", err))
 		}
 	}
 
 	return errs.Combine()
 }
 
 func (r *relationshipDB) PutFollow(ctx context.Context, follow *gtsmodel.Follow) error {
 	return r.state.Caches.GTS.Follow().Store(follow, func() error {
 		_, err := r.conn.NewInsert().Model(follow).Exec(ctx)
 		return r.conn.ProcessError(err)
 	})
 }
 
 func (r *relationshipDB) UpdateFollow(ctx context.Context, follow *gtsmodel.Follow, columns ...string) error {
 	follow.UpdatedAt = time.Now()
 	if len(columns) > 0 {
 		// If we're updating by column, ensure "updated_at" is included.
 		columns = append(columns, "updated_at")
 	}
 
 	return r.state.Caches.GTS.Follow().Store(follow, func() error {
 		if _, err := r.conn.NewUpdate().
 			Model(follow).
 			Where("? = ?", bun.Ident("follow.id"), follow.ID).
 			Column(columns...).
 			Exec(ctx); err != nil {
 			return r.conn.ProcessError(err)
 		}
 
 		return nil
 	})
 }
 
 func (r *relationshipDB) deleteFollow(ctx context.Context, id string) error {
 	// Delete the follow itself using the given ID.
 	if _, err := r.conn.NewDelete().
 		Table("follows").
 		Where("? = ?", bun.Ident("id"), id).
 		Exec(ctx); err != nil {
 		return r.conn.ProcessError(err)
 	}
 
 	// Delete every list entry that used this followID.
 	if err := r.state.DB.DeleteListEntriesForFollowID(ctx, id); err != nil {
 		return fmt.Errorf("deleteFollow: error deleting list entries: %w", err)
 	}
 
 	return nil
 }
 
 func (r *relationshipDB) DeleteFollowByID(ctx context.Context, id string) error {
 	defer r.state.Caches.GTS.Follow().Invalidate("ID", id)
 
 	// Load follow into cache before attempting a delete,
 	// as we need it cached in order to trigger the invalidate
 	// callback. This in turn invalidates others.
 	follow, err := r.GetFollowByID(gtscontext.SetBarebones(ctx), id)
 	if err != nil {
 		if errors.Is(err, db.ErrNoEntries) {
 			// Already gone.
 			return nil
 		}
 		return err
 	}
 
 	// Finally delete follow from DB.
 	return r.deleteFollow(ctx, follow.ID)
 }
 
 func (r *relationshipDB) DeleteFollowByURI(ctx context.Context, uri string) error {
 	defer r.state.Caches.GTS.Follow().Invalidate("URI", uri)
 
 	// Load follow into cache before attempting a delete,
 	// as we need it cached in order to trigger the invalidate
 	// callback. This in turn invalidates others.
 	follow, err := r.GetFollowByURI(gtscontext.SetBarebones(ctx), uri)
 	if err != nil {
 		if errors.Is(err, db.ErrNoEntries) {
 			// Already gone.
 			return nil
 		}
 		return err
 	}
 
 	// Finally delete follow from DB.
 	return r.deleteFollow(ctx, follow.ID)
 }
 
 func (r *relationshipDB) DeleteAccountFollows(ctx context.Context, accountID string) error {
 	var followIDs []string
 
 	// Get full list of IDs.
 	if _, err := r.conn.
 		NewSelect().
 		Column("id").
 		Table("follows").
 		WhereOr("? = ? OR ? = ?",
 			bun.Ident("account_id"),
 			accountID,
 			bun.Ident("target_account_id"),
 			accountID,
 		).
 		Exec(ctx, &followIDs); err != nil {
 		return r.conn.ProcessError(err)
 	}
 
 	defer func() {
 		// Invalidate all IDs on return.
 		for _, id := range followIDs {
 			r.state.Caches.GTS.Follow().Invalidate("ID", id)
 		}
 	}()
 
 	// Load all follows into cache, this *really* isn't great
 	// but it is the only way we can ensure we invalidate all
 	// related caches correctly (e.g. visibility).
 	for _, id := range followIDs {
 		follow, err := r.GetFollowByID(ctx, id)
 		if err != nil && !errors.Is(err, db.ErrNoEntries) {
 			return err
 		}
 
 		// Delete each follow from DB.
 		if err := r.deleteFollow(ctx, follow.ID); err != nil && !errors.Is(err, db.ErrNoEntries) {
 			return err
 		}
 	}
 
 	return nil
 }