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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.sh/tangled.sh/core/api/tangled"
21 "tangled.sh/tangled.sh/core/appview"
22 "tangled.sh/tangled.sh/core/appview/cache"
23 "tangled.sh/tangled.sh/core/appview/cache/session"
24 "tangled.sh/tangled.sh/core/appview/config"
25 "tangled.sh/tangled.sh/core/appview/db"
26 "tangled.sh/tangled.sh/core/appview/notify"
27 "tangled.sh/tangled.sh/core/appview/oauth"
28 "tangled.sh/tangled.sh/core/appview/pages"
29 posthogService "tangled.sh/tangled.sh/core/appview/posthog"
30 "tangled.sh/tangled.sh/core/appview/reporesolver"
31 xrpcclient "tangled.sh/tangled.sh/core/appview/xrpcclient"
32 "tangled.sh/tangled.sh/core/eventconsumer"
33 "tangled.sh/tangled.sh/core/idresolver"
34 "tangled.sh/tangled.sh/core/jetstream"
35 tlog "tangled.sh/tangled.sh/core/log"
36 "tangled.sh/tangled.sh/core/rbac"
37 "tangled.sh/tangled.sh/core/tid"
38 // xrpcerr "tangled.sh/tangled.sh/core/xrpc/errors"
39)
40
41type State struct {
42 db *db.DB
43 notifier notify.Notifier
44 oauth *oauth.OAuth
45 enforcer *rbac.Enforcer
46 pages *pages.Pages
47 sess *session.SessionStore
48 idResolver *idresolver.Resolver
49 posthog posthog.Client
50 jc *jetstream.JetstreamClient
51 config *config.Config
52 repoResolver *reporesolver.RepoResolver
53 knotstream *eventconsumer.Consumer
54 spindlestream *eventconsumer.Consumer
55 logger *slog.Logger
56}
57
58func Make(ctx context.Context, config *config.Config) (*State, error) {
59 d, err := db.Make(config.Core.DbPath)
60 if err != nil {
61 return nil, fmt.Errorf("failed to create db: %w", err)
62 }
63
64 enforcer, err := rbac.NewEnforcer(config.Core.DbPath)
65 if err != nil {
66 return nil, fmt.Errorf("failed to create enforcer: %w", err)
67 }
68
69 res, err := idresolver.RedisResolver(config.Redis.ToURL())
70 if err != nil {
71 log.Printf("failed to create redis resolver: %v", err)
72 res = idresolver.DefaultResolver()
73 }
74
75 pgs := pages.NewPages(config, res)
76
77 cache := cache.New(config.Redis.Addr)
78 sess := session.New(cache)
79
80 oauth := oauth.NewOAuth(config, sess)
81
82 posthog, err := posthog.NewWithConfig(config.Posthog.ApiKey, posthog.Config{Endpoint: config.Posthog.Endpoint})
83 if err != nil {
84 return nil, fmt.Errorf("failed to create posthog client: %w", err)
85 }
86
87 repoResolver := reporesolver.New(config, enforcer, res, d)
88
89 wrapper := db.DbWrapper{d}
90 jc, err := jetstream.NewJetstreamClient(
91 config.Jetstream.Endpoint,
92 "appview",
93 []string{
94 tangled.GraphFollowNSID,
95 tangled.FeedStarNSID,
96 tangled.PublicKeyNSID,
97 tangled.RepoArtifactNSID,
98 tangled.ActorProfileNSID,
99 tangled.SpindleMemberNSID,
100 tangled.SpindleNSID,
101 tangled.StringNSID,
102 tangled.RepoIssueNSID,
103 tangled.RepoIssueCommentNSID,
104 },
105 nil,
106 slog.Default(),
107 wrapper,
108 false,
109
110 // in-memory filter is inapplicalble to appview so
111 // we'll never log dids anyway.
112 false,
113 )
114 if err != nil {
115 return nil, fmt.Errorf("failed to create jetstream client: %w", err)
116 }
117
118 ingester := appview.Ingester{
119 Db: wrapper,
120 Enforcer: enforcer,
121 IdResolver: res,
122 Config: config,
123 Logger: tlog.New("ingester"),
124 }
125 err = jc.StartJetstream(ctx, ingester.Ingest())
126 if err != nil {
127 return nil, fmt.Errorf("failed to start jetstream watcher: %w", err)
128 }
129
130 knotstream, err := Knotstream(ctx, config, d, enforcer, posthog)
131 if err != nil {
132 return nil, fmt.Errorf("failed to start knotstream consumer: %w", err)
133 }
134 knotstream.Start(ctx)
135
136 spindlestream, err := Spindlestream(ctx, config, d, enforcer)
137 if err != nil {
138 return nil, fmt.Errorf("failed to start spindlestream consumer: %w", err)
139 }
140 spindlestream.Start(ctx)
141
142 var notifiers []notify.Notifier
143 if !config.Core.Dev {
144 notifiers = append(notifiers, posthogService.NewPosthogNotifier(posthog))
145 }
146 notifier := notify.NewMergedNotifier(notifiers...)
147
148 state := &State{
149 d,
150 notifier,
151 oauth,
152 enforcer,
153 pgs,
154 sess,
155 res,
156 posthog,
157 jc,
158 config,
159 repoResolver,
160 knotstream,
161 spindlestream,
162 slog.Default(),
163 }
164
165 return state, nil
166}
167
168func (s *State) Favicon(w http.ResponseWriter, r *http.Request) {
169 w.Header().Set("Content-Type", "image/svg+xml")
170 w.Header().Set("Cache-Control", "public, max-age=31536000") // one year
171 w.Header().Set("ETag", `"favicon-svg-v1"`)
172
173 if match := r.Header.Get("If-None-Match"); match == `"favicon-svg-v1"` {
174 w.WriteHeader(http.StatusNotModified)
175 return
176 }
177
178 s.pages.Favicon(w)
179}
180
181func (s *State) TermsOfService(w http.ResponseWriter, r *http.Request) {
182 user := s.oauth.GetUser(r)
183 s.pages.TermsOfService(w, pages.TermsOfServiceParams{
184 LoggedInUser: user,
185 })
186}
187
188func (s *State) PrivacyPolicy(w http.ResponseWriter, r *http.Request) {
189 user := s.oauth.GetUser(r)
190 s.pages.PrivacyPolicy(w, pages.PrivacyPolicyParams{
191 LoggedInUser: user,
192 })
193}
194
195func (s *State) HomeOrTimeline(w http.ResponseWriter, r *http.Request) {
196 if s.oauth.GetUser(r) != nil {
197 s.Timeline(w, r)
198 return
199 }
200 s.Home(w, r)
201}
202
203func (s *State) Timeline(w http.ResponseWriter, r *http.Request) {
204 user := s.oauth.GetUser(r)
205
206 timeline, err := db.MakeTimeline(s.db, 50)
207 if err != nil {
208 log.Println(err)
209 s.pages.Notice(w, "timeline", "Uh oh! Failed to load timeline.")
210 }
211
212 repos, err := db.GetTopStarredReposLastWeek(s.db)
213 if err != nil {
214 log.Println(err)
215 s.pages.Notice(w, "topstarredrepos", "Unable to load.")
216 return
217 }
218
219 s.pages.Timeline(w, pages.TimelineParams{
220 LoggedInUser: user,
221 Timeline: timeline,
222 Repos: repos,
223 })
224}
225
226func (s *State) Home(w http.ResponseWriter, r *http.Request) {
227 timeline, err := db.MakeTimeline(s.db, 5)
228 if err != nil {
229 log.Println(err)
230 s.pages.Notice(w, "timeline", "Uh oh! Failed to load timeline.")
231 return
232 }
233
234 repos, err := db.GetTopStarredReposLastWeek(s.db)
235 if err != nil {
236 log.Println(err)
237 s.pages.Notice(w, "topstarredrepos", "Unable to load.")
238 return
239 }
240
241 s.pages.Home(w, pages.TimelineParams{
242 LoggedInUser: nil,
243 Timeline: timeline,
244 Repos: repos,
245 })
246}
247
248func (s *State) Keys(w http.ResponseWriter, r *http.Request) {
249 user := chi.URLParam(r, "user")
250 user = strings.TrimPrefix(user, "@")
251
252 if user == "" {
253 w.WriteHeader(http.StatusBadRequest)
254 return
255 }
256
257 id, err := s.idResolver.ResolveIdent(r.Context(), user)
258 if err != nil {
259 w.WriteHeader(http.StatusInternalServerError)
260 return
261 }
262
263 pubKeys, err := db.GetPublicKeysForDid(s.db, id.DID.String())
264 if err != nil {
265 w.WriteHeader(http.StatusNotFound)
266 return
267 }
268
269 if len(pubKeys) == 0 {
270 w.WriteHeader(http.StatusNotFound)
271 return
272 }
273
274 for _, k := range pubKeys {
275 key := strings.TrimRight(k.Key, "\n")
276 w.Write([]byte(fmt.Sprintln(key)))
277 }
278}
279
280func validateRepoName(name string) error {
281 // check for path traversal attempts
282 if name == "." || name == ".." ||
283 strings.Contains(name, "/") || strings.Contains(name, "\\") {
284 return fmt.Errorf("Repository name contains invalid path characters")
285 }
286
287 // check for sequences that could be used for traversal when normalized
288 if strings.Contains(name, "./") || strings.Contains(name, "../") ||
289 strings.HasPrefix(name, ".") || strings.HasSuffix(name, ".") {
290 return fmt.Errorf("Repository name contains invalid path sequence")
291 }
292
293 // then continue with character validation
294 for _, char := range name {
295 if !((char >= 'a' && char <= 'z') ||
296 (char >= 'A' && char <= 'Z') ||
297 (char >= '0' && char <= '9') ||
298 char == '-' || char == '_' || char == '.') {
299 return fmt.Errorf("Repository name can only contain alphanumeric characters, periods, hyphens, and underscores")
300 }
301 }
302
303 // additional check to prevent multiple sequential dots
304 if strings.Contains(name, "..") {
305 return fmt.Errorf("Repository name cannot contain sequential dots")
306 }
307
308 // if all checks pass
309 return nil
310}
311
312func stripGitExt(name string) string {
313 return strings.TrimSuffix(name, ".git")
314}
315
316func (s *State) NewRepo(w http.ResponseWriter, r *http.Request) {
317 switch r.Method {
318 case http.MethodGet:
319 user := s.oauth.GetUser(r)
320 knots, err := s.enforcer.GetKnotsForUser(user.Did)
321 if err != nil {
322 s.pages.Notice(w, "repo", "Invalid user account.")
323 return
324 }
325
326 s.pages.NewRepo(w, pages.NewRepoParams{
327 LoggedInUser: user,
328 Knots: knots,
329 })
330
331 case http.MethodPost:
332 l := s.logger.With("handler", "NewRepo")
333
334 user := s.oauth.GetUser(r)
335 l = l.With("did", user.Did)
336 l = l.With("handle", user.Handle)
337
338 // form validation
339 domain := r.FormValue("domain")
340 if domain == "" {
341 s.pages.Notice(w, "repo", "Invalid form submission—missing knot domain.")
342 return
343 }
344 l = l.With("knot", domain)
345
346 repoName := r.FormValue("name")
347 if repoName == "" {
348 s.pages.Notice(w, "repo", "Repository name cannot be empty.")
349 return
350 }
351
352 if err := validateRepoName(repoName); err != nil {
353 s.pages.Notice(w, "repo", err.Error())
354 return
355 }
356 repoName = stripGitExt(repoName)
357 l = l.With("repoName", repoName)
358
359 defaultBranch := r.FormValue("branch")
360 if defaultBranch == "" {
361 defaultBranch = "main"
362 }
363 l = l.With("defaultBranch", defaultBranch)
364
365 description := r.FormValue("description")
366
367 // ACL validation
368 ok, err := s.enforcer.E.Enforce(user.Did, domain, domain, "repo:create")
369 if err != nil || !ok {
370 l.Info("unauthorized")
371 s.pages.Notice(w, "repo", "You do not have permission to create a repo in this knot.")
372 return
373 }
374
375 // Check for existing repos
376 existingRepo, err := db.GetRepo(s.db, user.Did, repoName)
377 if err == nil && existingRepo != nil {
378 l.Info("repo exists")
379 s.pages.Notice(w, "repo", fmt.Sprintf("You already have a repository by this name on %s", existingRepo.Knot))
380 return
381 }
382
383 // create atproto record for this repo
384 rkey := tid.TID()
385 repo := &db.Repo{
386 Did: user.Did,
387 Name: repoName,
388 Knot: domain,
389 Rkey: rkey,
390 Description: description,
391 }
392
393 xrpcClient, err := s.oauth.AuthorizedClient(r)
394 if err != nil {
395 l.Info("PDS write failed", "err", err)
396 s.pages.Notice(w, "repo", "Failed to write record to PDS.")
397 return
398 }
399
400 createdAt := time.Now().Format(time.RFC3339)
401 atresp, err := xrpcClient.RepoPutRecord(r.Context(), &comatproto.RepoPutRecord_Input{
402 Collection: tangled.RepoNSID,
403 Repo: user.Did,
404 Rkey: rkey,
405 Record: &lexutil.LexiconTypeDecoder{
406 Val: &tangled.Repo{
407 Knot: repo.Knot,
408 Name: repoName,
409 CreatedAt: createdAt,
410 Owner: user.Did,
411 }},
412 })
413 if err != nil {
414 l.Info("PDS write failed", "err", err)
415 s.pages.Notice(w, "repo", "Failed to announce repository creation.")
416 return
417 }
418
419 aturi := atresp.Uri
420 l = l.With("aturi", aturi)
421 l.Info("wrote to PDS")
422
423 tx, err := s.db.BeginTx(r.Context(), nil)
424 if err != nil {
425 l.Info("txn failed", "err", err)
426 s.pages.Notice(w, "repo", "Failed to save repository information.")
427 return
428 }
429
430 // The rollback function reverts a few things on failure:
431 // - the pending txn
432 // - the ACLs
433 // - the atproto record created
434 rollback := func() {
435 err1 := tx.Rollback()
436 err2 := s.enforcer.E.LoadPolicy()
437 err3 := rollbackRecord(context.Background(), aturi, xrpcClient)
438
439 // ignore txn complete errors, this is okay
440 if errors.Is(err1, sql.ErrTxDone) {
441 err1 = nil
442 }
443
444 if errs := errors.Join(err1, err2, err3); errs != nil {
445 l.Error("failed to rollback changes", "errs", errs)
446 return
447 }
448 }
449 defer rollback()
450
451 client, err := s.oauth.ServiceClient(
452 r,
453 oauth.WithService(domain),
454 oauth.WithLxm(tangled.RepoCreateNSID),
455 oauth.WithDev(s.config.Core.Dev),
456 )
457 if err != nil {
458 l.Error("service auth failed", "err", err)
459 s.pages.Notice(w, "repo", "Failed to reach PDS.")
460 return
461 }
462
463 xe := tangled.RepoCreate(
464 r.Context(),
465 client,
466 &tangled.RepoCreate_Input{
467 Rkey: rkey,
468 },
469 )
470 if err := xrpcclient.HandleXrpcErr(xe); err != nil {
471 l.Error("xrpc error", "xe", xe)
472 s.pages.Notice(w, "repo", err.Error())
473 return
474 }
475
476 err = db.AddRepo(tx, repo)
477 if err != nil {
478 l.Error("db write failed", "err", err)
479 s.pages.Notice(w, "repo", "Failed to save repository information.")
480 return
481 }
482
483 // acls
484 p, _ := securejoin.SecureJoin(user.Did, repoName)
485 err = s.enforcer.AddRepo(user.Did, domain, p)
486 if err != nil {
487 l.Error("acl setup failed", "err", err)
488 s.pages.Notice(w, "repo", "Failed to set up repository permissions.")
489 return
490 }
491
492 err = tx.Commit()
493 if err != nil {
494 l.Error("txn commit failed", "err", err)
495 http.Error(w, err.Error(), http.StatusInternalServerError)
496 return
497 }
498
499 err = s.enforcer.E.SavePolicy()
500 if err != nil {
501 l.Error("acl save failed", "err", err)
502 http.Error(w, err.Error(), http.StatusInternalServerError)
503 return
504 }
505
506 // reset the ATURI because the transaction completed successfully
507 aturi = ""
508
509 s.notifier.NewRepo(r.Context(), repo)
510 s.pages.HxLocation(w, fmt.Sprintf("/@%s/%s", user.Handle, repoName))
511 }
512}
513
514// this is used to rollback changes made to the PDS
515//
516// it is a no-op if the provided ATURI is empty
517func rollbackRecord(ctx context.Context, aturi string, xrpcc *xrpcclient.Client) error {
518 if aturi == "" {
519 return nil
520 }
521
522 parsed := syntax.ATURI(aturi)
523
524 collection := parsed.Collection().String()
525 repo := parsed.Authority().String()
526 rkey := parsed.RecordKey().String()
527
528 _, err := xrpcc.RepoDeleteRecord(ctx, &comatproto.RepoDeleteRecord_Input{
529 Collection: collection,
530 Repo: repo,
531 Rkey: rkey,
532 })
533 return err
534}