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Monorepo for Tangled — https://tangled.org forked from tangled.org/core
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import ( "context" "database/sql" "errors" "fmt" "log/slog" "net/http" "strings" "time"
"tangled.org/core/api/tangled" "tangled.org/core/appview" "tangled.org/core/appview/config" "tangled.org/core/appview/db" "tangled.org/core/appview/models" "tangled.org/core/appview/notify" dbnotify "tangled.org/core/appview/notify/db" phnotify "tangled.org/core/appview/notify/posthog" "tangled.org/core/appview/oauth" "tangled.org/core/appview/pages" "tangled.org/core/appview/reporesolver" "tangled.org/core/appview/validator" xrpcclient "tangled.org/core/appview/xrpcclient" "tangled.org/core/eventconsumer" "tangled.org/core/idresolver" "tangled.org/core/jetstream" "tangled.org/core/log" tlog "tangled.org/core/log" "tangled.org/core/rbac" "tangled.org/core/tid"
comatproto "github.com/bluesky-social/indigo/api/atproto" atpclient "github.com/bluesky-social/indigo/atproto/client" "github.com/bluesky-social/indigo/atproto/syntax" lexutil "github.com/bluesky-social/indigo/lex/util" securejoin "github.com/cyphar/filepath-securejoin" "github.com/go-chi/chi/v5" "github.com/posthog/posthog-go")
type State struct { db *db.DB notifier notify.Notifier oauth *oauth.OAuth enforcer *rbac.Enforcer pages *pages.Pages idResolver *idresolver.Resolver posthog posthog.Client jc *jetstream.JetstreamClient config *config.Config repoResolver *reporesolver.RepoResolver knotstream *eventconsumer.Consumer spindlestream *eventconsumer.Consumer logger *slog.Logger validator *validator.Validator}
func Make(ctx context.Context, config *config.Config) (*State, error) { logger := tlog.FromContext(ctx)
d, err := db.Make(ctx, config.Core.DbPath) if err != nil { return nil, fmt.Errorf("failed to create db: %w", err) }
enforcer, err := rbac.NewEnforcer(config.Core.DbPath) if err != nil { return nil, fmt.Errorf("failed to create enforcer: %w", err) }
res, err := idresolver.RedisResolver(config.Redis.ToURL()) if err != nil { logger.Error("failed to create redis resolver", "err", err) res = idresolver.DefaultResolver() }
posthog, err := posthog.NewWithConfig(config.Posthog.ApiKey, posthog.Config{Endpoint: config.Posthog.Endpoint}) if err != nil { return nil, fmt.Errorf("failed to create posthog client: %w", err) }
pages := pages.NewPages(config, res, log.SubLogger(logger, "pages")) oauth, err := oauth.New(config, posthog, d, enforcer, res, log.SubLogger(logger, "oauth")) if err != nil { return nil, fmt.Errorf("failed to start oauth handler: %w", err) } validator := validator.New(d, res, enforcer)
repoResolver := reporesolver.New(config, enforcer, res, d)
wrapper := db.DbWrapper{Execer: d} jc, err := jetstream.NewJetstreamClient( config.Jetstream.Endpoint, "appview", []string{ tangled.GraphFollowNSID, tangled.FeedStarNSID, tangled.PublicKeyNSID, tangled.RepoArtifactNSID, tangled.ActorProfileNSID, tangled.SpindleMemberNSID, tangled.SpindleNSID, tangled.StringNSID, tangled.RepoIssueNSID, tangled.RepoIssueCommentNSID, tangled.LabelDefinitionNSID, tangled.LabelOpNSID, }, nil, tlog.SubLogger(logger, "jetstream"), wrapper, false,
// in-memory filter is inapplicalble to appview so // we'll never log dids anyway. false, ) if err != nil { return nil, fmt.Errorf("failed to create jetstream client: %w", err) }
if err := BackfillDefaultDefs(d, res); err != nil { return nil, fmt.Errorf("failed to backfill default label defs: %w", err) }
ingester := appview.Ingester{ Db: wrapper, Enforcer: enforcer, IdResolver: res, Config: config, Logger: log.SubLogger(logger, "ingester"), Validator: validator, } err = jc.StartJetstream(ctx, ingester.Ingest()) if err != nil { return nil, fmt.Errorf("failed to start jetstream watcher: %w", err) }
knotstream, err := Knotstream(ctx, config, d, enforcer, posthog) if err != nil { return nil, fmt.Errorf("failed to start knotstream consumer: %w", err) } knotstream.Start(ctx)
spindlestream, err := Spindlestream(ctx, config, d, enforcer) if err != nil { return nil, fmt.Errorf("failed to start spindlestream consumer: %w", err) } spindlestream.Start(ctx)
var notifiers []notify.Notifier
// Always add the database notifier notifiers = append(notifiers, dbnotify.NewDatabaseNotifier(d, res))
// Add other notifiers in production only if !config.Core.Dev { notifiers = append(notifiers, phnotify.NewPosthogNotifier(posthog)) } notifier := notify.NewMergedNotifier(notifiers...)
state := &State{ d, notifier, oauth, enforcer, pages, res, posthog, jc, config, repoResolver, knotstream, spindlestream, logger, validator, }
return state, nil}
func (s *State) Close() error { // other close up logic goes here return s.db.Close()}
func (s *State) Favicon(w http.ResponseWriter, r *http.Request) { w.Header().Set("Content-Type", "image/svg+xml") w.Header().Set("Cache-Control", "public, max-age=31536000") // one year w.Header().Set("ETag", `"favicon-svg-v1"`)
if match := r.Header.Get("If-None-Match"); match == `"favicon-svg-v1"` { w.WriteHeader(http.StatusNotModified) return }
s.pages.Favicon(w)}
func (s *State) RobotsTxt(w http.ResponseWriter, r *http.Request) { w.Header().Set("Content-Type", "text/plain") w.Header().Set("Cache-Control", "public, max-age=86400") // one day
robotsTxt := `User-agent: *Allow: /` w.Write([]byte(robotsTxt))}
// https://developer.mozilla.org/en-US/docs/Web/Progressive_web_apps/Manifestconst manifestJson = `{ "name": "tangled", "description": "tightly-knit social coding.", "icons": [ { "src": "/favicon.svg", "sizes": "144x144" } ], "start_url": "/", "id": "org.tangled",
"display": "standalone", "background_color": "#111827", "theme_color": "#111827"}`
func (p *State) PWAManifest(w http.ResponseWriter, r *http.Request) { w.Header().Set("Content-Type", "application/json") w.Write([]byte(manifestJson))}
func (s *State) TermsOfService(w http.ResponseWriter, r *http.Request) { user := s.oauth.GetUser(r) s.pages.TermsOfService(w, pages.TermsOfServiceParams{ LoggedInUser: user, })}
func (s *State) PrivacyPolicy(w http.ResponseWriter, r *http.Request) { user := s.oauth.GetUser(r) s.pages.PrivacyPolicy(w, pages.PrivacyPolicyParams{ LoggedInUser: user, })}
func (s *State) Brand(w http.ResponseWriter, r *http.Request) { user := s.oauth.GetUser(r) s.pages.Brand(w, pages.BrandParams{ LoggedInUser: user, })}
func (s *State) HomeOrTimeline(w http.ResponseWriter, r *http.Request) { if s.oauth.GetUser(r) != nil { s.Timeline(w, r) return } s.Home(w, r)}
func (s *State) Timeline(w http.ResponseWriter, r *http.Request) { user := s.oauth.GetUser(r)
// TODO: set this flag based on the UI filtered := false
var userDid string if user != nil { userDid = user.Did } timeline, err := db.MakeTimeline(s.db, 50, userDid, filtered) if err != nil { s.logger.Error("failed to make timeline", "err", err) s.pages.Notice(w, "timeline", "Uh oh! Failed to load timeline.") }
repos, err := db.GetTopStarredReposLastWeek(s.db) if err != nil { s.logger.Error("failed to get top starred repos", "err", err) s.pages.Notice(w, "topstarredrepos", "Unable to load.") return }
gfiLabel, err := db.GetLabelDefinition(s.db, db.FilterEq("at_uri", models.LabelGoodFirstIssue)) if err != nil { // non-fatal }
s.pages.Timeline(w, pages.TimelineParams{ LoggedInUser: user, Timeline: timeline, Repos: repos, GfiLabel: gfiLabel, })}
func (s *State) UpgradeBanner(w http.ResponseWriter, r *http.Request) { user := s.oauth.GetUser(r) if user == nil { return }
l := s.logger.With("handler", "UpgradeBanner") l = l.With("did", user.Did)
regs, err := db.GetRegistrations( s.db, db.FilterEq("did", user.Did), db.FilterEq("needs_upgrade", 1), ) if err != nil { l.Error("non-fatal: failed to get registrations", "err", err) }
spindles, err := db.GetSpindles( s.db, db.FilterEq("owner", user.Did), db.FilterEq("needs_upgrade", 1), ) if err != nil { l.Error("non-fatal: failed to get spindles", "err", err) }
if regs == nil && spindles == nil { return }
s.pages.UpgradeBanner(w, pages.UpgradeBannerParams{ Registrations: regs, Spindles: spindles, })}
func (s *State) Home(w http.ResponseWriter, r *http.Request) { // TODO: set this flag based on the UI filtered := false
timeline, err := db.MakeTimeline(s.db, 5, "", filtered) if err != nil { s.logger.Error("failed to make timeline", "err", err) s.pages.Notice(w, "timeline", "Uh oh! Failed to load timeline.") return }
repos, err := db.GetTopStarredReposLastWeek(s.db) if err != nil { s.logger.Error("failed to get top starred repos", "err", err) s.pages.Notice(w, "topstarredrepos", "Unable to load.") return }
s.pages.Home(w, pages.TimelineParams{ LoggedInUser: nil, Timeline: timeline, Repos: repos, })}
func (s *State) Keys(w http.ResponseWriter, r *http.Request) { user := chi.URLParam(r, "user") user = strings.TrimPrefix(user, "@")
if user == "" { w.WriteHeader(http.StatusBadRequest) return }
id, err := s.idResolver.ResolveIdent(r.Context(), user) if err != nil { w.WriteHeader(http.StatusInternalServerError) return }
pubKeys, err := db.GetPublicKeysForDid(s.db, id.DID.String()) if err != nil { w.WriteHeader(http.StatusNotFound) return }
if len(pubKeys) == 0 { w.WriteHeader(http.StatusNotFound) return }
for _, k := range pubKeys { key := strings.TrimRight(k.Key, "\n") fmt.Fprintln(w, key) }}
func validateRepoName(name string) error { // check for path traversal attempts if name == "." || name == ".." || strings.Contains(name, "/") || strings.Contains(name, "\\") { return fmt.Errorf("Repository name contains invalid path characters") }
// check for sequences that could be used for traversal when normalized if strings.Contains(name, "./") || strings.Contains(name, "../") || strings.HasPrefix(name, ".") || strings.HasSuffix(name, ".") { return fmt.Errorf("Repository name contains invalid path sequence") }
// then continue with character validation for _, char := range name { if !((char >= 'a' && char <= 'z') || (char >= 'A' && char <= 'Z') || (char >= '0' && char <= '9') || char == '-' || char == '_' || char == '.') { return fmt.Errorf("Repository name can only contain alphanumeric characters, periods, hyphens, and underscores") } }
// additional check to prevent multiple sequential dots if strings.Contains(name, "..") { return fmt.Errorf("Repository name cannot contain sequential dots") }
// if all checks pass return nil}
func stripGitExt(name string) string { return strings.TrimSuffix(name, ".git")}
func (s *State) NewRepo(w http.ResponseWriter, r *http.Request) { switch r.Method { case http.MethodGet: user := s.oauth.GetUser(r) knots, err := s.enforcer.GetKnotsForUser(user.Did) if err != nil { s.pages.Notice(w, "repo", "Invalid user account.") return }
s.pages.NewRepo(w, pages.NewRepoParams{ LoggedInUser: user, Knots: knots, })
case http.MethodPost: l := s.logger.With("handler", "NewRepo")
user := s.oauth.GetUser(r) l = l.With("did", user.Did)
// form validation domain := r.FormValue("domain") if domain == "" { s.pages.Notice(w, "repo", "Invalid form submission—missing knot domain.") return } l = l.With("knot", domain)
repoName := r.FormValue("name") if repoName == "" { s.pages.Notice(w, "repo", "Repository name cannot be empty.") return }
if err := validateRepoName(repoName); err != nil { s.pages.Notice(w, "repo", err.Error()) return } repoName = stripGitExt(repoName) l = l.With("repoName", repoName)
defaultBranch := r.FormValue("branch") if defaultBranch == "" { defaultBranch = "main" } l = l.With("defaultBranch", defaultBranch)
description := r.FormValue("description")
// ACL validation ok, err := s.enforcer.E.Enforce(user.Did, domain, domain, "repo:create") if err != nil || !ok { l.Info("unauthorized") s.pages.Notice(w, "repo", "You do not have permission to create a repo in this knot.") return }
// Check for existing repos existingRepo, err := db.GetRepo( s.db, db.FilterEq("did", user.Did), db.FilterEq("name", repoName), ) if err == nil && existingRepo != nil { l.Info("repo exists") s.pages.Notice(w, "repo", fmt.Sprintf("You already have a repository by this name on %s", existingRepo.Knot)) return }
// create atproto record for this repo rkey := tid.TID() repo := &models.Repo{ Did: user.Did, Name: repoName, Knot: domain, Rkey: rkey, Description: description, Created: time.Now(), Labels: models.DefaultLabelDefs(), } record := repo.AsRecord()
atpClient, err := s.oauth.AuthorizedClient(r) if err != nil { l.Info("PDS write failed", "err", err) s.pages.Notice(w, "repo", "Failed to write record to PDS.") return }
atresp, err := comatproto.RepoPutRecord(r.Context(), atpClient, &comatproto.RepoPutRecord_Input{ Collection: tangled.RepoNSID, Repo: user.Did, Rkey: rkey, Record: &lexutil.LexiconTypeDecoder{ Val: &record, }, }) if err != nil { l.Info("PDS write failed", "err", err) s.pages.Notice(w, "repo", "Failed to announce repository creation.") return }
aturi := atresp.Uri l = l.With("aturi", aturi) l.Info("wrote to PDS")
tx, err := s.db.BeginTx(r.Context(), nil) if err != nil { l.Info("txn failed", "err", err) s.pages.Notice(w, "repo", "Failed to save repository information.") return }
// The rollback function reverts a few things on failure: // - the pending txn // - the ACLs // - the atproto record created rollback := func() { err1 := tx.Rollback() err2 := s.enforcer.E.LoadPolicy() err3 := rollbackRecord(context.Background(), aturi, atpClient)
// ignore txn complete errors, this is okay if errors.Is(err1, sql.ErrTxDone) { err1 = nil }
if errs := errors.Join(err1, err2, err3); errs != nil { l.Error("failed to rollback changes", "errs", errs) return } } defer rollback()
client, err := s.oauth.ServiceClient( r, oauth.WithService(domain), oauth.WithLxm(tangled.RepoCreateNSID), oauth.WithDev(s.config.Core.Dev), ) if err != nil { l.Error("service auth failed", "err", err) s.pages.Notice(w, "repo", "Failed to reach PDS.") return }
xe := tangled.RepoCreate( r.Context(), client, &tangled.RepoCreate_Input{ Rkey: rkey, }, ) if err := xrpcclient.HandleXrpcErr(xe); err != nil { l.Error("xrpc error", "xe", xe) s.pages.Notice(w, "repo", err.Error()) return }
err = db.AddRepo(tx, repo) if err != nil { l.Error("db write failed", "err", err) s.pages.Notice(w, "repo", "Failed to save repository information.") return }
// acls p, _ := securejoin.SecureJoin(user.Did, repoName) err = s.enforcer.AddRepo(user.Did, domain, p) if err != nil { l.Error("acl setup failed", "err", err) s.pages.Notice(w, "repo", "Failed to set up repository permissions.") return }
err = tx.Commit() if err != nil { l.Error("txn commit failed", "err", err) http.Error(w, err.Error(), http.StatusInternalServerError) return }
err = s.enforcer.E.SavePolicy() if err != nil { l.Error("acl save failed", "err", err) http.Error(w, err.Error(), http.StatusInternalServerError) return }
// reset the ATURI because the transaction completed successfully aturi = ""
s.notifier.NewRepo(r.Context(), repo) s.pages.HxLocation(w, fmt.Sprintf("/@%s/%s", user.Did, repoName)) }}
// this is used to rollback changes made to the PDS//// it is a no-op if the provided ATURI is emptyfunc rollbackRecord(ctx context.Context, aturi string, client *atpclient.APIClient) error { if aturi == "" { return nil }
parsed := syntax.ATURI(aturi)
collection := parsed.Collection().String() repo := parsed.Authority().String() rkey := parsed.RecordKey().String()
_, err := comatproto.RepoDeleteRecord(ctx, client, &comatproto.RepoDeleteRecord_Input{ Collection: collection, Repo: repo, Rkey: rkey, }) return err}
func BackfillDefaultDefs(e db.Execer, r *idresolver.Resolver) error { defaults := models.DefaultLabelDefs() defaultLabels, err := db.GetLabelDefinitions(e, db.FilterIn("at_uri", defaults)) if err != nil { return err } // already present if len(defaultLabels) == len(defaults) { return nil }
labelDefs, err := models.FetchDefaultDefs(r) if err != nil { return err }
// Insert each label definition to the database for _, labelDef := range labelDefs { _, err = db.AddLabelDefinition(e, &labelDef) if err != nil { return fmt.Errorf("failed to add label definition %s: %v", labelDef.Name, err) } }
return nil}