foxwitch.net
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 "tangled.sh/tangled.sh/core/appview/validator"
32 xrpcclient "tangled.sh/tangled.sh/core/appview/xrpcclient"
33 "tangled.sh/tangled.sh/core/eventconsumer"
34 "tangled.sh/tangled.sh/core/idresolver"
35 "tangled.sh/tangled.sh/core/jetstream"
36 tlog "tangled.sh/tangled.sh/core/log"
37 "tangled.sh/tangled.sh/core/rbac"
38 "tangled.sh/tangled.sh/core/tid"
39 // xrpcerr "tangled.sh/tangled.sh/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 timeline, err := db.MakeTimeline(s.db, 50)
215 if err != nil {
216 log.Println(err)
217 s.pages.Notice(w, "timeline", "Uh oh! Failed to load timeline.")
218 }
219
220 repos, err := db.GetTopStarredReposLastWeek(s.db)
221 if err != nil {
222 log.Println(err)
223 s.pages.Notice(w, "topstarredrepos", "Unable to load.")
224 return
225 }
226
227 s.pages.Timeline(w, pages.TimelineParams{
228 LoggedInUser: user,
229 Timeline: timeline,
230 Repos: repos,
231 })
232}
233
234func (s *State) UpgradeBanner(w http.ResponseWriter, r *http.Request) {
235 user := s.oauth.GetUser(r)
236 l := s.logger.With("handler", "UpgradeBanner")
237 l = l.With("did", user.Did)
238 l = l.With("handle", user.Handle)
239
240 regs, err := db.GetRegistrations(
241 s.db,
242 db.FilterEq("did", user.Did),
243 db.FilterEq("needs_upgrade", 1),
244 )
245 if err != nil {
246 l.Error("non-fatal: failed to get registrations", "err", err)
247 }
248
249 spindles, err := db.GetSpindles(
250 s.db,
251 db.FilterEq("owner", user.Did),
252 db.FilterEq("needs_upgrade", 1),
253 )
254 if err != nil {
255 l.Error("non-fatal: failed to get spindles", "err", err)
256 }
257
258 if regs == nil && spindles == nil {
259 return
260 }
261
262 s.pages.UpgradeBanner(w, pages.UpgradeBannerParams{
263 Registrations: regs,
264 Spindles: spindles,
265 })
266}
267
268func (s *State) Home(w http.ResponseWriter, r *http.Request) {
269 timeline, err := db.MakeTimeline(s.db, 5)
270 if err != nil {
271 log.Println(err)
272 s.pages.Notice(w, "timeline", "Uh oh! Failed to load timeline.")
273 return
274 }
275
276 repos, err := db.GetTopStarredReposLastWeek(s.db)
277 if err != nil {
278 log.Println(err)
279 s.pages.Notice(w, "topstarredrepos", "Unable to load.")
280 return
281 }
282
283 s.pages.Home(w, pages.TimelineParams{
284 LoggedInUser: nil,
285 Timeline: timeline,
286 Repos: repos,
287 })
288}
289
290func (s *State) Keys(w http.ResponseWriter, r *http.Request) {
291 user := chi.URLParam(r, "user")
292 user = strings.TrimPrefix(user, "@")
293
294 if user == "" {
295 w.WriteHeader(http.StatusBadRequest)
296 return
297 }
298
299 id, err := s.idResolver.ResolveIdent(r.Context(), user)
300 if err != nil {
301 w.WriteHeader(http.StatusInternalServerError)
302 return
303 }
304
305 pubKeys, err := db.GetPublicKeysForDid(s.db, id.DID.String())
306 if err != nil {
307 w.WriteHeader(http.StatusNotFound)
308 return
309 }
310
311 if len(pubKeys) == 0 {
312 w.WriteHeader(http.StatusNotFound)
313 return
314 }
315
316 for _, k := range pubKeys {
317 key := strings.TrimRight(k.Key, "\n")
318 fmt.Fprintln(w, key)
319 }
320}
321
322func validateRepoName(name string) error {
323 // check for path traversal attempts
324 if name == "." || name == ".." ||
325 strings.Contains(name, "/") || strings.Contains(name, "\\") {
326 return fmt.Errorf("Repository name contains invalid path characters")
327 }
328
329 // check for sequences that could be used for traversal when normalized
330 if strings.Contains(name, "./") || strings.Contains(name, "../") ||
331 strings.HasPrefix(name, ".") || strings.HasSuffix(name, ".") {
332 return fmt.Errorf("Repository name contains invalid path sequence")
333 }
334
335 // then continue with character validation
336 for _, char := range name {
337 if !((char >= 'a' && char <= 'z') ||
338 (char >= 'A' && char <= 'Z') ||
339 (char >= '0' && char <= '9') ||
340 char == '-' || char == '_' || char == '.') {
341 return fmt.Errorf("Repository name can only contain alphanumeric characters, periods, hyphens, and underscores")
342 }
343 }
344
345 // additional check to prevent multiple sequential dots
346 if strings.Contains(name, "..") {
347 return fmt.Errorf("Repository name cannot contain sequential dots")
348 }
349
350 // if all checks pass
351 return nil
352}
353
354func stripGitExt(name string) string {
355 return strings.TrimSuffix(name, ".git")
356}
357
358func (s *State) NewRepo(w http.ResponseWriter, r *http.Request) {
359 switch r.Method {
360 case http.MethodGet:
361 user := s.oauth.GetUser(r)
362 knots, err := s.enforcer.GetKnotsForUser(user.Did)
363 if err != nil {
364 s.pages.Notice(w, "repo", "Invalid user account.")
365 return
366 }
367
368 s.pages.NewRepo(w, pages.NewRepoParams{
369 LoggedInUser: user,
370 Knots: knots,
371 })
372
373 case http.MethodPost:
374 l := s.logger.With("handler", "NewRepo")
375
376 user := s.oauth.GetUser(r)
377 l = l.With("did", user.Did)
378 l = l.With("handle", user.Handle)
379
380 // form validation
381 domain := r.FormValue("domain")
382 if domain == "" {
383 s.pages.Notice(w, "repo", "Invalid form submission—missing knot domain.")
384 return
385 }
386 l = l.With("knot", domain)
387
388 repoName := r.FormValue("name")
389 if repoName == "" {
390 s.pages.Notice(w, "repo", "Repository name cannot be empty.")
391 return
392 }
393
394 if err := validateRepoName(repoName); err != nil {
395 s.pages.Notice(w, "repo", err.Error())
396 return
397 }
398 repoName = stripGitExt(repoName)
399 l = l.With("repoName", repoName)
400
401 defaultBranch := r.FormValue("branch")
402 if defaultBranch == "" {
403 defaultBranch = "main"
404 }
405 l = l.With("defaultBranch", defaultBranch)
406
407 description := r.FormValue("description")
408
409 // ACL validation
410 ok, err := s.enforcer.E.Enforce(user.Did, domain, domain, "repo:create")
411 if err != nil || !ok {
412 l.Info("unauthorized")
413 s.pages.Notice(w, "repo", "You do not have permission to create a repo in this knot.")
414 return
415 }
416
417 // Check for existing repos
418 existingRepo, err := db.GetRepo(
419 s.db,
420 db.FilterEq("did", user.Did),
421 db.FilterEq("name", repoName),
422 )
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}