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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, 15)
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 timeline = timeline[:5]
242
243 s.pages.Home(w, pages.TimelineParams{
244 LoggedInUser: nil,
245 Timeline: timeline,
246 Repos: repos,
247 })
248}
249
250func (s *State) Keys(w http.ResponseWriter, r *http.Request) {
251 user := chi.URLParam(r, "user")
252 user = strings.TrimPrefix(user, "@")
253
254 if user == "" {
255 w.WriteHeader(http.StatusBadRequest)
256 return
257 }
258
259 id, err := s.idResolver.ResolveIdent(r.Context(), user)
260 if err != nil {
261 w.WriteHeader(http.StatusInternalServerError)
262 return
263 }
264
265 pubKeys, err := db.GetPublicKeysForDid(s.db, id.DID.String())
266 if err != nil {
267 w.WriteHeader(http.StatusNotFound)
268 return
269 }
270
271 if len(pubKeys) == 0 {
272 w.WriteHeader(http.StatusNotFound)
273 return
274 }
275
276 for _, k := range pubKeys {
277 key := strings.TrimRight(k.Key, "\n")
278 w.Write([]byte(fmt.Sprintln(key)))
279 }
280}
281
282func validateRepoName(name string) error {
283 // check for path traversal attempts
284 if name == "." || name == ".." ||
285 strings.Contains(name, "/") || strings.Contains(name, "\\") {
286 return fmt.Errorf("Repository name contains invalid path characters")
287 }
288
289 // check for sequences that could be used for traversal when normalized
290 if strings.Contains(name, "./") || strings.Contains(name, "../") ||
291 strings.HasPrefix(name, ".") || strings.HasSuffix(name, ".") {
292 return fmt.Errorf("Repository name contains invalid path sequence")
293 }
294
295 // then continue with character validation
296 for _, char := range name {
297 if !((char >= 'a' && char <= 'z') ||
298 (char >= 'A' && char <= 'Z') ||
299 (char >= '0' && char <= '9') ||
300 char == '-' || char == '_' || char == '.') {
301 return fmt.Errorf("Repository name can only contain alphanumeric characters, periods, hyphens, and underscores")
302 }
303 }
304
305 // additional check to prevent multiple sequential dots
306 if strings.Contains(name, "..") {
307 return fmt.Errorf("Repository name cannot contain sequential dots")
308 }
309
310 // if all checks pass
311 return nil
312}
313
314func stripGitExt(name string) string {
315 return strings.TrimSuffix(name, ".git")
316}
317
318func (s *State) NewRepo(w http.ResponseWriter, r *http.Request) {
319 switch r.Method {
320 case http.MethodGet:
321 user := s.oauth.GetUser(r)
322 knots, err := s.enforcer.GetKnotsForUser(user.Did)
323 if err != nil {
324 s.pages.Notice(w, "repo", "Invalid user account.")
325 return
326 }
327
328 s.pages.NewRepo(w, pages.NewRepoParams{
329 LoggedInUser: user,
330 Knots: knots,
331 })
332
333 case http.MethodPost:
334 l := s.logger.With("handler", "NewRepo")
335
336 user := s.oauth.GetUser(r)
337 l = l.With("did", user.Did)
338 l = l.With("handle", user.Handle)
339
340 // form validation
341 domain := r.FormValue("domain")
342 if domain == "" {
343 s.pages.Notice(w, "repo", "Invalid form submission—missing knot domain.")
344 return
345 }
346 l = l.With("knot", domain)
347
348 repoName := r.FormValue("name")
349 if repoName == "" {
350 s.pages.Notice(w, "repo", "Repository name cannot be empty.")
351 return
352 }
353
354 if err := validateRepoName(repoName); err != nil {
355 s.pages.Notice(w, "repo", err.Error())
356 return
357 }
358 repoName = stripGitExt(repoName)
359 l = l.With("repoName", repoName)
360
361 defaultBranch := r.FormValue("branch")
362 if defaultBranch == "" {
363 defaultBranch = "main"
364 }
365 l = l.With("defaultBranch", defaultBranch)
366
367 description := r.FormValue("description")
368
369 // ACL validation
370 ok, err := s.enforcer.E.Enforce(user.Did, domain, domain, "repo:create")
371 if err != nil || !ok {
372 l.Info("unauthorized")
373 s.pages.Notice(w, "repo", "You do not have permission to create a repo in this knot.")
374 return
375 }
376
377 // Check for existing repos
378 existingRepo, err := db.GetRepo(s.db, user.Did, repoName)
379 if err == nil && existingRepo != nil {
380 l.Info("repo exists")
381 s.pages.Notice(w, "repo", fmt.Sprintf("You already have a repository by this name on %s", existingRepo.Knot))
382 return
383 }
384
385 // create atproto record for this repo
386 rkey := tid.TID()
387 repo := &db.Repo{
388 Did: user.Did,
389 Name: repoName,
390 Knot: domain,
391 Rkey: rkey,
392 Description: description,
393 }
394
395 xrpcClient, err := s.oauth.AuthorizedClient(r)
396 if err != nil {
397 l.Info("PDS write failed", "err", err)
398 s.pages.Notice(w, "repo", "Failed to write record to PDS.")
399 return
400 }
401
402 createdAt := time.Now().Format(time.RFC3339)
403 atresp, err := xrpcClient.RepoPutRecord(r.Context(), &comatproto.RepoPutRecord_Input{
404 Collection: tangled.RepoNSID,
405 Repo: user.Did,
406 Rkey: rkey,
407 Record: &lexutil.LexiconTypeDecoder{
408 Val: &tangled.Repo{
409 Knot: repo.Knot,
410 Name: repoName,
411 CreatedAt: createdAt,
412 Owner: user.Did,
413 }},
414 })
415 if err != nil {
416 l.Info("PDS write failed", "err", err)
417 s.pages.Notice(w, "repo", "Failed to announce repository creation.")
418 return
419 }
420
421 aturi := atresp.Uri
422 l = l.With("aturi", aturi)
423 l.Info("wrote to PDS")
424
425 tx, err := s.db.BeginTx(r.Context(), nil)
426 if err != nil {
427 l.Info("txn failed", "err", err)
428 s.pages.Notice(w, "repo", "Failed to save repository information.")
429 return
430 }
431
432 // The rollback function reverts a few things on failure:
433 // - the pending txn
434 // - the ACLs
435 // - the atproto record created
436 rollback := func() {
437 err1 := tx.Rollback()
438 err2 := s.enforcer.E.LoadPolicy()
439 err3 := rollbackRecord(context.Background(), aturi, xrpcClient)
440
441 // ignore txn complete errors, this is okay
442 if errors.Is(err1, sql.ErrTxDone) {
443 err1 = nil
444 }
445
446 if errs := errors.Join(err1, err2, err3); errs != nil {
447 l.Error("failed to rollback changes", "errs", errs)
448 return
449 }
450 }
451 defer rollback()
452
453 client, err := s.oauth.ServiceClient(
454 r,
455 oauth.WithService(domain),
456 oauth.WithLxm(tangled.RepoCreateNSID),
457 oauth.WithDev(s.config.Core.Dev),
458 )
459 if err != nil {
460 l.Error("service auth failed", "err", err)
461 s.pages.Notice(w, "repo", "Failed to reach PDS.")
462 return
463 }
464
465 xe := tangled.RepoCreate(
466 r.Context(),
467 client,
468 &tangled.RepoCreate_Input{
469 Rkey: rkey,
470 },
471 )
472 if err := xrpcclient.HandleXrpcErr(xe); err != nil {
473 l.Error("xrpc error", "xe", xe)
474 s.pages.Notice(w, "repo", err.Error())
475 return
476 }
477
478 err = db.AddRepo(tx, repo)
479 if err != nil {
480 l.Error("db write failed", "err", err)
481 s.pages.Notice(w, "repo", "Failed to save repository information.")
482 return
483 }
484
485 // acls
486 p, _ := securejoin.SecureJoin(user.Did, repoName)
487 err = s.enforcer.AddRepo(user.Did, domain, p)
488 if err != nil {
489 l.Error("acl setup failed", "err", err)
490 s.pages.Notice(w, "repo", "Failed to set up repository permissions.")
491 return
492 }
493
494 err = tx.Commit()
495 if err != nil {
496 l.Error("txn commit failed", "err", err)
497 http.Error(w, err.Error(), http.StatusInternalServerError)
498 return
499 }
500
501 err = s.enforcer.E.SavePolicy()
502 if err != nil {
503 l.Error("acl save failed", "err", err)
504 http.Error(w, err.Error(), http.StatusInternalServerError)
505 return
506 }
507
508 // reset the ATURI because the transaction completed successfully
509 aturi = ""
510
511 s.notifier.NewRepo(r.Context(), repo)
512 s.pages.HxLocation(w, fmt.Sprintf("/@%s/%s", user.Handle, repoName))
513 }
514}
515
516// this is used to rollback changes made to the PDS
517//
518// it is a no-op if the provided ATURI is empty
519func rollbackRecord(ctx context.Context, aturi string, xrpcc *xrpcclient.Client) error {
520 if aturi == "" {
521 return nil
522 }
523
524 parsed := syntax.ATURI(aturi)
525
526 collection := parsed.Collection().String()
527 repo := parsed.Authority().String()
528 rkey := parsed.RecordKey().String()
529
530 _, err := xrpcc.RepoDeleteRecord(ctx, &comatproto.RepoDeleteRecord_Input{
531 Collection: collection,
532 Repo: repo,
533 Rkey: rkey,
534 })
535 return err
536}