[chore] Deinterface processor and subprocessors (#1501)

* [chore] Deinterface processor and subprocessors

* expose subprocessors via function calls

* missing license header

1 files changed, 294 insertions, 0 deletions

diff --git a/internal/processing/admin/domainblock.go b/internal/processing/admin/domainblock.go
new file mode 100644
index 000000000..415ac610f
--- /dev/null
+++ b/internal/processing/admin/domainblock.go
@@ -0,0 +1,294 @@
+package admin
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"mime/multipart"
+	"strings"
+	"time"
+
+	"codeberg.org/gruf/go-kv"
+	"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/log"
+	"github.com/superseriousbusiness/gotosocial/internal/messages"
+	"github.com/superseriousbusiness/gotosocial/internal/text"
+)
+
+func (p *Processor) DomainBlockCreate(ctx context.Context, account *gtsmodel.Account, domain string, obfuscate bool, publicComment string, privateComment string, subscriptionID string) (*apimodel.DomainBlock, gtserror.WithCode) {
+	// domain blocks will always be lowercase
+	domain = strings.ToLower(domain)
+
+	// first check if we already have a block -- if err == nil we already had a block so we can skip a whole lot of work
+	block, err := p.db.GetDomainBlock(ctx, domain)
+	if err != nil {
+		if !errors.Is(err, db.ErrNoEntries) {
+			// something went wrong in the DB
+			return nil, gtserror.NewErrorInternalError(fmt.Errorf("db error checking for existence of domain block %s: %s", domain, err))
+		}
+
+		// there's no block for this domain yet so create one
+		newBlock := &gtsmodel.DomainBlock{
+			ID:                 id.NewULID(),
+			Domain:             domain,
+			CreatedByAccountID: account.ID,
+			PrivateComment:     text.SanitizePlaintext(privateComment),
+			PublicComment:      text.SanitizePlaintext(publicComment),
+			Obfuscate:          &obfuscate,
+			SubscriptionID:     subscriptionID,
+		}
+
+		// Insert the new block into the database
+		if err := p.db.CreateDomainBlock(ctx, newBlock); err != nil {
+			return nil, gtserror.NewErrorInternalError(fmt.Errorf("db error putting new domain block %s: %s", domain, err))
+		}
+
+		// Set the newly created block
+		block = newBlock
+
+		// Process the side effects of the domain block asynchronously since it might take a while
+		go func() {
+			p.initiateDomainBlockSideEffects(context.Background(), account, block)
+		}()
+	}
+
+	// Convert our gts model domain block into an API model
+	apiDomainBlock, err := p.tc.DomainBlockToAPIDomainBlock(ctx, block, false)
+	if err != nil {
+		return nil, gtserror.NewErrorInternalError(fmt.Errorf("error converting domain block to frontend/api representation %s: %s", domain, err))
+	}
+
+	return apiDomainBlock, nil
+}
+
+// initiateDomainBlockSideEffects should be called asynchronously, to process the side effects of a domain block:
+//
+// 1. Strip most info away from the instance entry for the domain.
+// 2. Delete the instance account for that instance if it exists.
+// 3. Select all accounts from this instance and pass them through the delete functionality of the processor.
+func (p *Processor) initiateDomainBlockSideEffects(ctx context.Context, account *gtsmodel.Account, block *gtsmodel.DomainBlock) {
+	l := log.WithContext(ctx).WithFields(kv.Fields{{"domain", block.Domain}}...)
+	l.Debug("processing domain block side effects")
+
+	// if we have an instance entry for this domain, update it with the new block ID and clear all fields
+	instance := &gtsmodel.Instance{}
+	if err := p.db.GetWhere(ctx, []db.Where{{Key: "domain", Value: block.Domain}}, instance); err == nil {
+		updatingColumns := []string{
+			"title",
+			"updated_at",
+			"suspended_at",
+			"domain_block_id",
+			"short_description",
+			"description",
+			"terms",
+			"contact_email",
+			"contact_account_username",
+			"contact_account_id",
+			"version",
+		}
+		instance.Title = ""
+		instance.UpdatedAt = time.Now()
+		instance.SuspendedAt = time.Now()
+		instance.DomainBlockID = block.ID
+		instance.ShortDescription = ""
+		instance.Description = ""
+		instance.Terms = ""
+		instance.ContactEmail = ""
+		instance.ContactAccountUsername = ""
+		instance.ContactAccountID = ""
+		instance.Version = ""
+		if err := p.db.UpdateByID(ctx, instance, instance.ID, updatingColumns...); err != nil {
+			l.Errorf("domainBlockProcessSideEffects: db error updating instance: %s", err)
+		}
+		l.Debug("domainBlockProcessSideEffects: instance entry updated")
+	}
+
+	// if we have an instance account for this instance, delete it
+	if instanceAccount, err := p.db.GetAccountByUsernameDomain(ctx, block.Domain, block.Domain); err == nil {
+		if err := p.db.DeleteAccount(ctx, instanceAccount.ID); err != nil {
+			l.Errorf("domainBlockProcessSideEffects: db error deleting instance account: %s", err)
+		}
+	}
+
+	// delete accounts through the normal account deletion system (which should also delete media + posts + remove posts from timelines)
+
+	limit := 20      // just select 20 accounts at a time so we don't nuke our DB/mem with one huge query
+	var maxID string // this is initially an empty string so we'll start at the top of accounts list (sorted by ID)
+
+selectAccountsLoop:
+	for {
+		accounts, err := p.db.GetInstanceAccounts(ctx, block.Domain, maxID, limit)
+		if err != nil {
+			if err == db.ErrNoEntries {
+				// no accounts left for this instance so we're done
+				l.Infof("domainBlockProcessSideEffects: done iterating through accounts for domain %s", block.Domain)
+				break selectAccountsLoop
+			}
+			// an actual error has occurred
+			l.Errorf("domainBlockProcessSideEffects: db error selecting accounts for domain %s: %s", block.Domain, err)
+			break selectAccountsLoop
+		}
+
+		for i, a := range accounts {
+			l.Debugf("putting delete for account %s in the clientAPI channel", a.Username)
+
+			// pass the account delete through the client api channel for processing
+			p.clientWorker.Queue(messages.FromClientAPI{
+				APObjectType:   ap.ActorPerson,
+				APActivityType: ap.ActivityDelete,
+				GTSModel:       block,
+				OriginAccount:  account,
+				TargetAccount:  a,
+			})
+
+			// if this is the last account in the slice, set the maxID appropriately for the next query
+			if i == len(accounts)-1 {
+				maxID = a.ID
+			}
+		}
+	}
+}
+
+// DomainBlocksImport handles the import of a bunch of domain blocks at once, by calling the DomainBlockCreate function for each domain in the provided file.
+func (p *Processor) DomainBlocksImport(ctx context.Context, account *gtsmodel.Account, domains *multipart.FileHeader) ([]*apimodel.DomainBlock, gtserror.WithCode) {
+	f, err := domains.Open()
+	if err != nil {
+		return nil, gtserror.NewErrorBadRequest(fmt.Errorf("DomainBlocksImport: error opening attachment: %s", err))
+	}
+	buf := new(bytes.Buffer)
+	size, err := io.Copy(buf, f)
+	if err != nil {
+		return nil, gtserror.NewErrorBadRequest(fmt.Errorf("DomainBlocksImport: error reading attachment: %s", err))
+	}
+	if size == 0 {
+		return nil, gtserror.NewErrorBadRequest(errors.New("DomainBlocksImport: could not read provided attachment: size 0 bytes"))
+	}
+
+	d := []apimodel.DomainBlock{}
+	if err := json.Unmarshal(buf.Bytes(), &d); err != nil {
+		return nil, gtserror.NewErrorBadRequest(fmt.Errorf("DomainBlocksImport: could not read provided attachment: %s", err))
+	}
+
+	blocks := []*apimodel.DomainBlock{}
+	for _, d := range d {
+		block, err := p.DomainBlockCreate(ctx, account, d.Domain.Domain, false, d.PublicComment, "", "")
+		if err != nil {
+			return nil, err
+		}
+
+		blocks = append(blocks, block)
+	}
+
+	return blocks, nil
+}
+
+// DomainBlocksGet returns all existing domain blocks.
+// If export is true, the format will be suitable for writing out to an export.
+func (p *Processor) DomainBlocksGet(ctx context.Context, account *gtsmodel.Account, export bool) ([]*apimodel.DomainBlock, gtserror.WithCode) {
+	domainBlocks := []*gtsmodel.DomainBlock{}
+
+	if err := p.db.GetAll(ctx, &domainBlocks); err != nil {
+		if !errors.Is(err, db.ErrNoEntries) {
+			// something has gone really wrong
+			return nil, gtserror.NewErrorInternalError(err)
+		}
+	}
+
+	apiDomainBlocks := []*apimodel.DomainBlock{}
+	for _, b := range domainBlocks {
+		apiDomainBlock, err := p.tc.DomainBlockToAPIDomainBlock(ctx, b, export)
+		if err != nil {
+			return nil, gtserror.NewErrorInternalError(err)
+		}
+		apiDomainBlocks = append(apiDomainBlocks, apiDomainBlock)
+	}
+
+	return apiDomainBlocks, nil
+}
+
+// DomainBlockGet returns one domain block with the given id.
+// If export is true, the format will be suitable for writing out to an export.
+func (p *Processor) DomainBlockGet(ctx context.Context, account *gtsmodel.Account, id string, export bool) (*apimodel.DomainBlock, gtserror.WithCode) {
+	domainBlock := &gtsmodel.DomainBlock{}
+
+	if err := p.db.GetByID(ctx, id, domainBlock); err != nil {
+		if !errors.Is(err, db.ErrNoEntries) {
+			// something has gone really wrong
+			return nil, gtserror.NewErrorInternalError(err)
+		}
+		// there are no entries for this ID
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("no entry for ID %s", id))
+	}
+
+	apiDomainBlock, err := p.tc.DomainBlockToAPIDomainBlock(ctx, domainBlock, export)
+	if err != nil {
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	return apiDomainBlock, nil
+}
+
+// DomainBlockDelete removes one domain block with the given ID.
+func (p *Processor) DomainBlockDelete(ctx context.Context, account *gtsmodel.Account, id string) (*apimodel.DomainBlock, gtserror.WithCode) {
+	domainBlock := &gtsmodel.DomainBlock{}
+
+	if err := p.db.GetByID(ctx, id, domainBlock); err != nil {
+		if !errors.Is(err, db.ErrNoEntries) {
+			// something has gone really wrong
+			return nil, gtserror.NewErrorInternalError(err)
+		}
+		// there are no entries for this ID
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("no entry for ID %s", id))
+	}
+
+	// prepare the domain block to return
+	apiDomainBlock, err := p.tc.DomainBlockToAPIDomainBlock(ctx, domainBlock, false)
+	if err != nil {
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	// Delete the domain block
+	if err := p.db.DeleteDomainBlock(ctx, domainBlock.Domain); err != nil {
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	// remove the domain block reference from the instance, if we have an entry for it
+	i := &gtsmodel.Instance{}
+	if err := p.db.GetWhere(ctx, []db.Where{
+		{Key: "domain", Value: domainBlock.Domain},
+		{Key: "domain_block_id", Value: id},
+	}, i); err == nil {
+		updatingColumns := []string{"suspended_at", "domain_block_id", "updated_at"}
+		i.SuspendedAt = time.Time{}
+		i.DomainBlockID = ""
+		i.UpdatedAt = time.Now()
+		if err := p.db.UpdateByID(ctx, i, i.ID, updatingColumns...); err != nil {
+			return nil, gtserror.NewErrorInternalError(fmt.Errorf("couldn't update database entry for instance %s: %s", domainBlock.Domain, err))
+		}
+	}
+
+	// unsuspend all accounts whose suspension origin was this domain block
+	// 1. remove the 'suspended_at' entry from their accounts
+	if err := p.db.UpdateWhere(ctx, []db.Where{
+		{Key: "suspension_origin", Value: domainBlock.ID},
+	}, "suspended_at", nil, &[]*gtsmodel.Account{}); err != nil {
+		return nil, gtserror.NewErrorInternalError(fmt.Errorf("database error removing suspended_at from accounts: %s", err))
+	}
+
+	// 2. remove the 'suspension_origin' entry from their accounts
+	if err := p.db.UpdateWhere(ctx, []db.Where{
+		{Key: "suspension_origin", Value: domainBlock.ID},
+	}, "suspension_origin", nil, &[]*gtsmodel.Account{}); err != nil {
+		return nil, gtserror.NewErrorInternalError(fmt.Errorf("database error removing suspension_origin from accounts: %s", err))
+	}
+
+	return apiDomainBlock, nil
+}