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tangled.org
1package state
2
3import (
4 "context"
5 "database/sql"
6 "errors"
7 "fmt"
8 "log"
9 "log/slog"
10 "net/http"
11 "strings"
12 "time"
13
14 comatproto "github.com/bluesky-social/indigo/api/atproto"
15 "github.com/bluesky-social/indigo/atproto/syntax"
16 lexutil "github.com/bluesky-social/indigo/lex/util"
17 securejoin "github.com/cyphar/filepath-securejoin"
18 "github.com/go-chi/chi/v5"
19 "github.com/posthog/posthog-go"
20 "tangled.org/core/api/tangled"
21 "tangled.org/core/appview"
22 "tangled.org/core/appview/cache"
23 "tangled.org/core/appview/cache/session"
24 "tangled.org/core/appview/config"
25 "tangled.org/core/appview/db"
26 "tangled.org/core/appview/notify"
27 "tangled.org/core/appview/oauth"
28 "tangled.org/core/appview/pages"
29 posthogService "tangled.org/core/appview/posthog"
30 "tangled.org/core/appview/reporesolver"
31 "tangled.org/core/appview/validator"
32 xrpcclient "tangled.org/core/appview/xrpcclient"
33 "tangled.org/core/eventconsumer"
34 "tangled.org/core/idresolver"
35 "tangled.org/core/jetstream"
36 tlog "tangled.org/core/log"
37 "tangled.org/core/rbac"
38 "tangled.org/core/tid"
39 // xrpcerr "tangled.org/core/xrpc/errors"
40)
41
42type State struct {
43 db *db.DB
44 notifier notify.Notifier
45 oauth *oauth.OAuth
46 enforcer *rbac.Enforcer
47 pages *pages.Pages
48 sess *session.SessionStore
49 idResolver *idresolver.Resolver
50 posthog posthog.Client
51 jc *jetstream.JetstreamClient
52 config *config.Config
53 repoResolver *reporesolver.RepoResolver
54 knotstream *eventconsumer.Consumer
55 spindlestream *eventconsumer.Consumer
56 logger *slog.Logger
57 validator *validator.Validator
58}
59
60func Make(ctx context.Context, config *config.Config) (*State, error) {
61 d, err := db.Make(config.Core.DbPath)
62 if err != nil {
63 return nil, fmt.Errorf("failed to create db: %w", err)
64 }
65
66 enforcer, err := rbac.NewEnforcer(config.Core.DbPath)
67 if err != nil {
68 return nil, fmt.Errorf("failed to create enforcer: %w", err)
69 }
70
71 res, err := idresolver.RedisResolver(config.Redis.ToURL())
72 if err != nil {
73 log.Printf("failed to create redis resolver: %v", err)
74 res = idresolver.DefaultResolver()
75 }
76
77 pgs := pages.NewPages(config, res)
78 cache := cache.New(config.Redis.Addr)
79 sess := session.New(cache)
80 oauth := oauth.NewOAuth(config, sess)
81 validator := validator.New(d)
82
83 posthog, err := posthog.NewWithConfig(config.Posthog.ApiKey, posthog.Config{Endpoint: config.Posthog.Endpoint})
84 if err != nil {
85 return nil, fmt.Errorf("failed to create posthog client: %w", err)
86 }
87
88 repoResolver := reporesolver.New(config, enforcer, res, d)
89
90 wrapper := db.DbWrapper{d}
91 jc, err := jetstream.NewJetstreamClient(
92 config.Jetstream.Endpoint,
93 "appview",
94 []string{
95 tangled.GraphFollowNSID,
96 tangled.FeedStarNSID,
97 tangled.PublicKeyNSID,
98 tangled.RepoArtifactNSID,
99 tangled.ActorProfileNSID,
100 tangled.SpindleMemberNSID,
101 tangled.SpindleNSID,
102 tangled.StringNSID,
103 tangled.RepoIssueNSID,
104 tangled.RepoIssueCommentNSID,
105 },
106 nil,
107 slog.Default(),
108 wrapper,
109 false,
110
111 // in-memory filter is inapplicalble to appview so
112 // we'll never log dids anyway.
113 false,
114 )
115 if err != nil {
116 return nil, fmt.Errorf("failed to create jetstream client: %w", err)
117 }
118
119 ingester := appview.Ingester{
120 Db: wrapper,
121 Enforcer: enforcer,
122 IdResolver: res,
123 Config: config,
124 Logger: tlog.New("ingester"),
125 Validator: validator,
126 }
127 err = jc.StartJetstream(ctx, ingester.Ingest())
128 if err != nil {
129 return nil, fmt.Errorf("failed to start jetstream watcher: %w", err)
130 }
131
132 knotstream, err := Knotstream(ctx, config, d, enforcer, posthog)
133 if err != nil {
134 return nil, fmt.Errorf("failed to start knotstream consumer: %w", err)
135 }
136 knotstream.Start(ctx)
137
138 spindlestream, err := Spindlestream(ctx, config, d, enforcer)
139 if err != nil {
140 return nil, fmt.Errorf("failed to start spindlestream consumer: %w", err)
141 }
142 spindlestream.Start(ctx)
143
144 var notifiers []notify.Notifier
145 if !config.Core.Dev {
146 notifiers = append(notifiers, posthogService.NewPosthogNotifier(posthog))
147 }
148 notifier := notify.NewMergedNotifier(notifiers...)
149
150 state := &State{
151 d,
152 notifier,
153 oauth,
154 enforcer,
155 pgs,
156 sess,
157 res,
158 posthog,
159 jc,
160 config,
161 repoResolver,
162 knotstream,
163 spindlestream,
164 slog.Default(),
165 validator,
166 }
167
168 return state, nil
169}
170
171func (s *State) Close() error {
172 // other close up logic goes here
173 return s.db.Close()
174}
175
176func (s *State) Favicon(w http.ResponseWriter, r *http.Request) {
177 w.Header().Set("Content-Type", "image/svg+xml")
178 w.Header().Set("Cache-Control", "public, max-age=31536000") // one year
179 w.Header().Set("ETag", `"favicon-svg-v1"`)
180
181 if match := r.Header.Get("If-None-Match"); match == `"favicon-svg-v1"` {
182 w.WriteHeader(http.StatusNotModified)
183 return
184 }
185
186 s.pages.Favicon(w)
187}
188
189func (s *State) TermsOfService(w http.ResponseWriter, r *http.Request) {
190 user := s.oauth.GetUser(r)
191 s.pages.TermsOfService(w, pages.TermsOfServiceParams{
192 LoggedInUser: user,
193 })
194}
195
196func (s *State) PrivacyPolicy(w http.ResponseWriter, r *http.Request) {
197 user := s.oauth.GetUser(r)
198 s.pages.PrivacyPolicy(w, pages.PrivacyPolicyParams{
199 LoggedInUser: user,
200 })
201}
202
203func (s *State) HomeOrTimeline(w http.ResponseWriter, r *http.Request) {
204 if s.oauth.GetUser(r) != nil {
205 s.Timeline(w, r)
206 return
207 }
208 s.Home(w, r)
209}
210
211func (s *State) Timeline(w http.ResponseWriter, r *http.Request) {
212 user := s.oauth.GetUser(r)
213
214 var userDid string
215 if user != nil {
216 userDid = user.Did
217 }
218 timeline, err := db.MakeTimeline(s.db, 50, userDid)
219 if err != nil {
220 log.Println(err)
221 s.pages.Notice(w, "timeline", "Uh oh! Failed to load timeline.")
222 }
223
224 repos, err := db.GetTopStarredReposLastWeek(s.db)
225 if err != nil {
226 log.Println(err)
227 s.pages.Notice(w, "topstarredrepos", "Unable to load.")
228 return
229 }
230
231 s.pages.Timeline(w, pages.TimelineParams{
232 LoggedInUser: user,
233 Timeline: timeline,
234 Repos: repos,
235 })
236}
237
238func (s *State) UpgradeBanner(w http.ResponseWriter, r *http.Request) {
239 user := s.oauth.GetUser(r)
240 l := s.logger.With("handler", "UpgradeBanner")
241 l = l.With("did", user.Did)
242 l = l.With("handle", user.Handle)
243
244 regs, err := db.GetRegistrations(
245 s.db,
246 db.FilterEq("did", user.Did),
247 db.FilterEq("needs_upgrade", 1),
248 )
249 if err != nil {
250 l.Error("non-fatal: failed to get registrations", "err", err)
251 }
252
253 spindles, err := db.GetSpindles(
254 s.db,
255 db.FilterEq("owner", user.Did),
256 db.FilterEq("needs_upgrade", 1),
257 )
258 if err != nil {
259 l.Error("non-fatal: failed to get spindles", "err", err)
260 }
261
262 if regs == nil && spindles == nil {
263 return
264 }
265
266 s.pages.UpgradeBanner(w, pages.UpgradeBannerParams{
267 Registrations: regs,
268 Spindles: spindles,
269 })
270}
271
272func (s *State) Home(w http.ResponseWriter, r *http.Request) {
273 timeline, err := db.MakeTimeline(s.db, 5, "")
274 if err != nil {
275 log.Println(err)
276 s.pages.Notice(w, "timeline", "Uh oh! Failed to load timeline.")
277 return
278 }
279
280 repos, err := db.GetTopStarredReposLastWeek(s.db)
281 if err != nil {
282 log.Println(err)
283 s.pages.Notice(w, "topstarredrepos", "Unable to load.")
284 return
285 }
286
287 s.pages.Home(w, pages.TimelineParams{
288 LoggedInUser: nil,
289 Timeline: timeline,
290 Repos: repos,
291 })
292}
293
294func (s *State) Keys(w http.ResponseWriter, r *http.Request) {
295 user := chi.URLParam(r, "user")
296 user = strings.TrimPrefix(user, "@")
297
298 if user == "" {
299 w.WriteHeader(http.StatusBadRequest)
300 return
301 }
302
303 id, err := s.idResolver.ResolveIdent(r.Context(), user)
304 if err != nil {
305 w.WriteHeader(http.StatusInternalServerError)
306 return
307 }
308
309 pubKeys, err := db.GetPublicKeysForDid(s.db, id.DID.String())
310 if err != nil {
311 w.WriteHeader(http.StatusNotFound)
312 return
313 }
314
315 if len(pubKeys) == 0 {
316 w.WriteHeader(http.StatusNotFound)
317 return
318 }
319
320 for _, k := range pubKeys {
321 key := strings.TrimRight(k.Key, "\n")
322 fmt.Fprintln(w, key)
323 }
324}
325
326func validateRepoName(name string) error {
327 // check for path traversal attempts
328 if name == "." || name == ".." ||
329 strings.Contains(name, "/") || strings.Contains(name, "\\") {
330 return fmt.Errorf("Repository name contains invalid path characters")
331 }
332
333 // check for sequences that could be used for traversal when normalized
334 if strings.Contains(name, "./") || strings.Contains(name, "../") ||
335 strings.HasPrefix(name, ".") || strings.HasSuffix(name, ".") {
336 return fmt.Errorf("Repository name contains invalid path sequence")
337 }
338
339 // then continue with character validation
340 for _, char := range name {
341 if !((char >= 'a' && char <= 'z') ||
342 (char >= 'A' && char <= 'Z') ||
343 (char >= '0' && char <= '9') ||
344 char == '-' || char == '_' || char == '.') {
345 return fmt.Errorf("Repository name can only contain alphanumeric characters, periods, hyphens, and underscores")
346 }
347 }
348
349 // additional check to prevent multiple sequential dots
350 if strings.Contains(name, "..") {
351 return fmt.Errorf("Repository name cannot contain sequential dots")
352 }
353
354 // if all checks pass
355 return nil
356}
357
358func stripGitExt(name string) string {
359 return strings.TrimSuffix(name, ".git")
360}
361
362func (s *State) NewRepo(w http.ResponseWriter, r *http.Request) {
363 switch r.Method {
364 case http.MethodGet:
365 user := s.oauth.GetUser(r)
366 knots, err := s.enforcer.GetKnotsForUser(user.Did)
367 if err != nil {
368 s.pages.Notice(w, "repo", "Invalid user account.")
369 return
370 }
371
372 s.pages.NewRepo(w, pages.NewRepoParams{
373 LoggedInUser: user,
374 Knots: knots,
375 })
376
377 case http.MethodPost:
378 l := s.logger.With("handler", "NewRepo")
379
380 user := s.oauth.GetUser(r)
381 l = l.With("did", user.Did)
382 l = l.With("handle", user.Handle)
383
384 // form validation
385 domain := r.FormValue("domain")
386 if domain == "" {
387 s.pages.Notice(w, "repo", "Invalid form submission—missing knot domain.")
388 return
389 }
390 l = l.With("knot", domain)
391
392 repoName := r.FormValue("name")
393 if repoName == "" {
394 s.pages.Notice(w, "repo", "Repository name cannot be empty.")
395 return
396 }
397
398 if err := validateRepoName(repoName); err != nil {
399 s.pages.Notice(w, "repo", err.Error())
400 return
401 }
402 repoName = stripGitExt(repoName)
403 l = l.With("repoName", repoName)
404
405 defaultBranch := r.FormValue("branch")
406 if defaultBranch == "" {
407 defaultBranch = "main"
408 }
409 l = l.With("defaultBranch", defaultBranch)
410
411 description := r.FormValue("description")
412
413 // ACL validation
414 ok, err := s.enforcer.E.Enforce(user.Did, domain, domain, "repo:create")
415 if err != nil || !ok {
416 l.Info("unauthorized")
417 s.pages.Notice(w, "repo", "You do not have permission to create a repo in this knot.")
418 return
419 }
420
421 // Check for existing repos
422 existingRepo, err := db.GetRepo(s.db, user.Did, repoName)
423 if err == nil && existingRepo != nil {
424 l.Info("repo exists")
425 s.pages.Notice(w, "repo", fmt.Sprintf("You already have a repository by this name on %s", existingRepo.Knot))
426 return
427 }
428
429 // create atproto record for this repo
430 rkey := tid.TID()
431 repo := &db.Repo{
432 Did: user.Did,
433 Name: repoName,
434 Knot: domain,
435 Rkey: rkey,
436 Description: description,
437 Created: time.Now(),
438 }
439 record := repo.AsRecord()
440
441 xrpcClient, err := s.oauth.AuthorizedClient(r)
442 if err != nil {
443 l.Info("PDS write failed", "err", err)
444 s.pages.Notice(w, "repo", "Failed to write record to PDS.")
445 return
446 }
447
448 atresp, err := xrpcClient.RepoPutRecord(r.Context(), &comatproto.RepoPutRecord_Input{
449 Collection: tangled.RepoNSID,
450 Repo: user.Did,
451 Rkey: rkey,
452 Record: &lexutil.LexiconTypeDecoder{
453 Val: &record,
454 },
455 })
456 if err != nil {
457 l.Info("PDS write failed", "err", err)
458 s.pages.Notice(w, "repo", "Failed to announce repository creation.")
459 return
460 }
461
462 aturi := atresp.Uri
463 l = l.With("aturi", aturi)
464 l.Info("wrote to PDS")
465
466 tx, err := s.db.BeginTx(r.Context(), nil)
467 if err != nil {
468 l.Info("txn failed", "err", err)
469 s.pages.Notice(w, "repo", "Failed to save repository information.")
470 return
471 }
472
473 // The rollback function reverts a few things on failure:
474 // - the pending txn
475 // - the ACLs
476 // - the atproto record created
477 rollback := func() {
478 err1 := tx.Rollback()
479 err2 := s.enforcer.E.LoadPolicy()
480 err3 := rollbackRecord(context.Background(), aturi, xrpcClient)
481
482 // ignore txn complete errors, this is okay
483 if errors.Is(err1, sql.ErrTxDone) {
484 err1 = nil
485 }
486
487 if errs := errors.Join(err1, err2, err3); errs != nil {
488 l.Error("failed to rollback changes", "errs", errs)
489 return
490 }
491 }
492 defer rollback()
493
494 client, err := s.oauth.ServiceClient(
495 r,
496 oauth.WithService(domain),
497 oauth.WithLxm(tangled.RepoCreateNSID),
498 oauth.WithDev(s.config.Core.Dev),
499 )
500 if err != nil {
501 l.Error("service auth failed", "err", err)
502 s.pages.Notice(w, "repo", "Failed to reach PDS.")
503 return
504 }
505
506 xe := tangled.RepoCreate(
507 r.Context(),
508 client,
509 &tangled.RepoCreate_Input{
510 Rkey: rkey,
511 },
512 )
513 if err := xrpcclient.HandleXrpcErr(xe); err != nil {
514 l.Error("xrpc error", "xe", xe)
515 s.pages.Notice(w, "repo", err.Error())
516 return
517 }
518
519 err = db.AddRepo(tx, repo)
520 if err != nil {
521 l.Error("db write failed", "err", err)
522 s.pages.Notice(w, "repo", "Failed to save repository information.")
523 return
524 }
525
526 // acls
527 p, _ := securejoin.SecureJoin(user.Did, repoName)
528 err = s.enforcer.AddRepo(user.Did, domain, p)
529 if err != nil {
530 l.Error("acl setup failed", "err", err)
531 s.pages.Notice(w, "repo", "Failed to set up repository permissions.")
532 return
533 }
534
535 err = tx.Commit()
536 if err != nil {
537 l.Error("txn commit failed", "err", err)
538 http.Error(w, err.Error(), http.StatusInternalServerError)
539 return
540 }
541
542 err = s.enforcer.E.SavePolicy()
543 if err != nil {
544 l.Error("acl save failed", "err", err)
545 http.Error(w, err.Error(), http.StatusInternalServerError)
546 return
547 }
548
549 // reset the ATURI because the transaction completed successfully
550 aturi = ""
551
552 s.notifier.NewRepo(r.Context(), repo)
553 s.pages.HxLocation(w, fmt.Sprintf("/@%s/%s", user.Handle, repoName))
554 }
555}
556
557// this is used to rollback changes made to the PDS
558//
559// it is a no-op if the provided ATURI is empty
560func rollbackRecord(ctx context.Context, aturi string, xrpcc *xrpcclient.Client) error {
561 if aturi == "" {
562 return nil
563 }
564
565 parsed := syntax.ATURI(aturi)
566
567 collection := parsed.Collection().String()
568 repo := parsed.Authority().String()
569 rkey := parsed.RecordKey().String()
570
571 _, err := xrpcc.RepoDeleteRecord(ctx, &comatproto.RepoDeleteRecord_Input{
572 Collection: collection,
573 Repo: repo,
574 Rkey: rkey,
575 })
576 return err
577}