[chore] Deinterface processor and subprocessors (#1501)

* [chore] Deinterface processor and subprocessors

* expose subprocessors via function calls

* missing license header

internal/processing/account/block.go

@@ -0,0 +1,192 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2023 GoToSocial Authors admin@gotosocial.org
+
+   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 account
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"github.com/superseriousbusiness/gotosocial/internal/ap"
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/id"
+	"github.com/superseriousbusiness/gotosocial/internal/messages"
+	"github.com/superseriousbusiness/gotosocial/internal/uris"
+)
+
+// BlockCreate handles the creation of a block from requestingAccount to targetAccountID, either remote or local.
+func (p *Processor) BlockCreate(ctx context.Context, requestingAccount *gtsmodel.Account, targetAccountID string) (*apimodel.Relationship, gtserror.WithCode) {
+	// make sure the target account actually exists in our db
+	targetAccount, err := p.db.GetAccountByID(ctx, targetAccountID)
+	if err != nil {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("BlockCreate: error getting account %s from the db: %s", targetAccountID, err))
+	}
+
+	// if requestingAccount already blocks target account, we don't need to do anything
+	if blocked, err := p.db.IsBlocked(ctx, requestingAccount.ID, targetAccountID, false); err != nil {
+		return nil, gtserror.NewErrorInternalError(fmt.Errorf("BlockCreate: error checking existence of block: %s", err))
+	} else if blocked {
+		return p.RelationshipGet(ctx, requestingAccount, targetAccountID)
+	}
+
+	// don't block yourself, silly
+	if requestingAccount.ID == targetAccountID {
+		return nil, gtserror.NewErrorNotAcceptable(fmt.Errorf("BlockCreate: account %s cannot block itself", requestingAccount.ID))
+	}
+
+	// make the block
+	block := &gtsmodel.Block{}
+	newBlockID := id.NewULID()
+	block.ID = newBlockID
+	block.AccountID = requestingAccount.ID
+	block.Account = requestingAccount
+	block.TargetAccountID = targetAccountID
+	block.TargetAccount = targetAccount
+	block.URI = uris.GenerateURIForBlock(requestingAccount.Username, newBlockID)
+
+	// whack it in the database
+	if err := p.db.PutBlock(ctx, block); err != nil {
+		return nil, gtserror.NewErrorInternalError(fmt.Errorf("BlockCreate: error creating block in db: %s", err))
+	}
+
+	// clear any follows or follow requests from the blocked account to the target account -- this is a simple delete
+	if err := p.db.DeleteWhere(ctx, []db.Where{
+		{Key: "account_id", Value: targetAccountID},
+		{Key: "target_account_id", Value: requestingAccount.ID},
+	}, &gtsmodel.Follow{}); err != nil {
+		return nil, gtserror.NewErrorInternalError(fmt.Errorf("BlockCreate: error removing follow in db: %s", err))
+	}
+	if err := p.db.DeleteWhere(ctx, []db.Where{
+		{Key: "account_id", Value: targetAccountID},
+		{Key: "target_account_id", Value: requestingAccount.ID},
+	}, &gtsmodel.FollowRequest{}); err != nil {
+		return nil, gtserror.NewErrorInternalError(fmt.Errorf("BlockCreate: error removing follow in db: %s", err))
+	}
+
+	// clear any follows or follow requests from the requesting account to the target account --
+	// this might require federation so we need to pass some messages around
+
+	// check if a follow request exists from the requesting account to the target account, and remove it if it does (storing the URI for later)
+	var frChanged bool
+	var frURI string
+	fr := &gtsmodel.FollowRequest{}
+	if err := p.db.GetWhere(ctx, []db.Where{
+		{Key: "account_id", Value: requestingAccount.ID},
+		{Key: "target_account_id", Value: targetAccountID},
+	}, fr); err == nil {
+		frURI = fr.URI
+		if err := p.db.DeleteByID(ctx, fr.ID, fr); err != nil {
+			return nil, gtserror.NewErrorInternalError(fmt.Errorf("BlockCreate: error removing follow request from db: %s", err))
+		}
+		frChanged = true
+	}
+
+	// now do the same thing for any existing follow
+	var fChanged bool
+	var fURI string
+	f := &gtsmodel.Follow{}
+	if err := p.db.GetWhere(ctx, []db.Where{
+		{Key: "account_id", Value: requestingAccount.ID},
+		{Key: "target_account_id", Value: targetAccountID},
+	}, f); err == nil {
+		fURI = f.URI
+		if err := p.db.DeleteByID(ctx, f.ID, f); err != nil {
+			return nil, gtserror.NewErrorInternalError(fmt.Errorf("BlockCreate: error removing follow from db: %s", err))
+		}
+		fChanged = true
+	}
+
+	// follow request status changed so send the UNDO activity to the channel for async processing
+	if frChanged {
+		p.clientWorker.Queue(messages.FromClientAPI{
+			APObjectType:   ap.ActivityFollow,
+			APActivityType: ap.ActivityUndo,
+			GTSModel: &gtsmodel.Follow{
+				AccountID:       requestingAccount.ID,
+				TargetAccountID: targetAccountID,
+				URI:             frURI,
+			},
+			OriginAccount: requestingAccount,
+			TargetAccount: targetAccount,
+		})
+	}
+
+	// follow status changed so send the UNDO activity to the channel for async processing
+	if fChanged {
+		p.clientWorker.Queue(messages.FromClientAPI{
+			APObjectType:   ap.ActivityFollow,
+			APActivityType: ap.ActivityUndo,
+			GTSModel: &gtsmodel.Follow{
+				AccountID:       requestingAccount.ID,
+				TargetAccountID: targetAccountID,
+				URI:             fURI,
+			},
+			OriginAccount: requestingAccount,
+			TargetAccount: targetAccount,
+		})
+	}
+
+	// handle the rest of the block process asynchronously
+	p.clientWorker.Queue(messages.FromClientAPI{
+		APObjectType:   ap.ActivityBlock,
+		APActivityType: ap.ActivityCreate,
+		GTSModel:       block,
+		OriginAccount:  requestingAccount,
+		TargetAccount:  targetAccount,
+	})
+
+	return p.RelationshipGet(ctx, requestingAccount, targetAccountID)
+}
+
+// BlockRemove handles the removal of a block from requestingAccount to targetAccountID, either remote or local.
+func (p *Processor) BlockRemove(ctx context.Context, requestingAccount *gtsmodel.Account, targetAccountID string) (*apimodel.Relationship, gtserror.WithCode) {
+	// make sure the target account actually exists in our db
+	targetAccount, err := p.db.GetAccountByID(ctx, targetAccountID)
+	if err != nil {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("BlockCreate: error getting account %s from the db: %s", targetAccountID, err))
+	}
+
+	// check if a block exists, and remove it if it does
+	block, err := p.db.GetBlock(ctx, requestingAccount.ID, targetAccountID)
+	if err == nil {
+		// we got a block, remove it
+		block.Account = requestingAccount
+		block.TargetAccount = targetAccount
+		if err := p.db.DeleteBlockByID(ctx, block.ID); err != nil {
+			return nil, gtserror.NewErrorInternalError(fmt.Errorf("BlockRemove: error removing block from db: %s", err))
+		}
+
+		// send the UNDO activity to the client worker for async processing
+		p.clientWorker.Queue(messages.FromClientAPI{
+			APObjectType:   ap.ActivityBlock,
+			APActivityType: ap.ActivityUndo,
+			GTSModel:       block,
+			OriginAccount:  requestingAccount,
+			TargetAccount:  targetAccount,
+		})
+	} else if !errors.Is(err, db.ErrNoEntries) {
+		return nil, gtserror.NewErrorInternalError(fmt.Errorf("BlockRemove: error getting possible block from db: %s", err))
+	}
+
+	// return whatever relationship results from all this
+	return p.RelationshipGet(ctx, requestingAccount, targetAccountID)
+}