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 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) Close() error {
169 // other close up logic goes here
170 return s.db.Close()
171}
172
173func (s *State) Favicon(w http.ResponseWriter, r *http.Request) {
174 w.Header().Set("Content-Type", "image/svg+xml")
175 w.Header().Set("Cache-Control", "public, max-age=31536000") // one year
176 w.Header().Set("ETag", `"favicon-svg-v1"`)
177
178 if match := r.Header.Get("If-None-Match"); match == `"favicon-svg-v1"` {
179 w.WriteHeader(http.StatusNotModified)
180 return
181 }
182
183 s.pages.Favicon(w)
184}
185
186func (s *State) TermsOfService(w http.ResponseWriter, r *http.Request) {
187 user := s.oauth.GetUser(r)
188 s.pages.TermsOfService(w, pages.TermsOfServiceParams{
189 LoggedInUser: user,
190 })
191}
192
193func (s *State) PrivacyPolicy(w http.ResponseWriter, r *http.Request) {
194 user := s.oauth.GetUser(r)
195 s.pages.PrivacyPolicy(w, pages.PrivacyPolicyParams{
196 LoggedInUser: user,
197 })
198}
199
200func (s *State) HomeOrTimeline(w http.ResponseWriter, r *http.Request) {
201 if s.oauth.GetUser(r) != nil {
202 s.Timeline(w, r)
203 return
204 }
205 s.Home(w, r)
206}
207
208func (s *State) Timeline(w http.ResponseWriter, r *http.Request) {
209 user := s.oauth.GetUser(r)
210
211 timeline, err := db.MakeTimeline(s.db, 50)
212 if err != nil {
213 log.Println(err)
214 s.pages.Notice(w, "timeline", "Uh oh! Failed to load timeline.")
215 }
216
217 repos, err := db.GetTopStarredReposLastWeek(s.db)
218 if err != nil {
219 log.Println(err)
220 s.pages.Notice(w, "topstarredrepos", "Unable to load.")
221 return
222 }
223
224 s.pages.Timeline(w, pages.TimelineParams{
225 LoggedInUser: user,
226 Timeline: timeline,
227 Repos: repos,
228 })
229}
230
231func (s *State) Home(w http.ResponseWriter, r *http.Request) {
232 timeline, err := db.MakeTimeline(s.db, 5)
233 if err != nil {
234 log.Println(err)
235 s.pages.Notice(w, "timeline", "Uh oh! Failed to load timeline.")
236 return
237 }
238
239 repos, err := db.GetTopStarredReposLastWeek(s.db)
240 if err != nil {
241 log.Println(err)
242 s.pages.Notice(w, "topstarredrepos", "Unable to load.")
243 return
244 }
245
246 s.pages.Home(w, pages.TimelineParams{
247 LoggedInUser: nil,
248 Timeline: timeline,
249 Repos: repos,
250 })
251}
252
253func (s *State) Keys(w http.ResponseWriter, r *http.Request) {
254 user := chi.URLParam(r, "user")
255 user = strings.TrimPrefix(user, "@")
256
257 if user == "" {
258 w.WriteHeader(http.StatusBadRequest)
259 return
260 }
261
262 id, err := s.idResolver.ResolveIdent(r.Context(), user)
263 if err != nil {
264 w.WriteHeader(http.StatusInternalServerError)
265 return
266 }
267
268 pubKeys, err := db.GetPublicKeysForDid(s.db, id.DID.String())
269 if err != nil {
270 w.WriteHeader(http.StatusNotFound)
271 return
272 }
273
274 if len(pubKeys) == 0 {
275 w.WriteHeader(http.StatusNotFound)
276 return
277 }
278
279 for _, k := range pubKeys {
280 key := strings.TrimRight(k.Key, "\n")
281 w.Write([]byte(fmt.Sprintln(key)))
282 }
283}
284
285func validateRepoName(name string) error {
286 // check for path traversal attempts
287 if name == "." || name == ".." ||
288 strings.Contains(name, "/") || strings.Contains(name, "\\") {
289 return fmt.Errorf("Repository name contains invalid path characters")
290 }
291
292 // check for sequences that could be used for traversal when normalized
293 if strings.Contains(name, "./") || strings.Contains(name, "../") ||
294 strings.HasPrefix(name, ".") || strings.HasSuffix(name, ".") {
295 return fmt.Errorf("Repository name contains invalid path sequence")
296 }
297
298 // then continue with character validation
299 for _, char := range name {
300 if !((char >= 'a' && char <= 'z') ||
301 (char >= 'A' && char <= 'Z') ||
302 (char >= '0' && char <= '9') ||
303 char == '-' || char == '_' || char == '.') {
304 return fmt.Errorf("Repository name can only contain alphanumeric characters, periods, hyphens, and underscores")
305 }
306 }
307
308 // additional check to prevent multiple sequential dots
309 if strings.Contains(name, "..") {
310 return fmt.Errorf("Repository name cannot contain sequential dots")
311 }
312
313 // if all checks pass
314 return nil
315}
316
317func stripGitExt(name string) string {
318 return strings.TrimSuffix(name, ".git")
319}
320
321func (s *State) NewRepo(w http.ResponseWriter, r *http.Request) {
322 switch r.Method {
323 case http.MethodGet:
324 user := s.oauth.GetUser(r)
325 knots, err := s.enforcer.GetKnotsForUser(user.Did)
326 if err != nil {
327 s.pages.Notice(w, "repo", "Invalid user account.")
328 return
329 }
330
331 s.pages.NewRepo(w, pages.NewRepoParams{
332 LoggedInUser: user,
333 Knots: knots,
334 })
335
336 case http.MethodPost:
337 l := s.logger.With("handler", "NewRepo")
338
339 user := s.oauth.GetUser(r)
340 l = l.With("did", user.Did)
341 l = l.With("handle", user.Handle)
342
343 // form validation
344 domain := r.FormValue("domain")
345 if domain == "" {
346 s.pages.Notice(w, "repo", "Invalid form submission—missing knot domain.")
347 return
348 }
349 l = l.With("knot", domain)
350
351 repoName := r.FormValue("name")
352 if repoName == "" {
353 s.pages.Notice(w, "repo", "Repository name cannot be empty.")
354 return
355 }
356
357 if err := validateRepoName(repoName); err != nil {
358 s.pages.Notice(w, "repo", err.Error())
359 return
360 }
361 repoName = stripGitExt(repoName)
362 l = l.With("repoName", repoName)
363
364 defaultBranch := r.FormValue("branch")
365 if defaultBranch == "" {
366 defaultBranch = "main"
367 }
368 l = l.With("defaultBranch", defaultBranch)
369
370 description := r.FormValue("description")
371
372 // ACL validation
373 ok, err := s.enforcer.E.Enforce(user.Did, domain, domain, "repo:create")
374 if err != nil || !ok {
375 l.Info("unauthorized")
376 s.pages.Notice(w, "repo", "You do not have permission to create a repo in this knot.")
377 return
378 }
379
380 // Check for existing repos
381 existingRepo, err := db.GetRepo(s.db, user.Did, repoName)
382 if err == nil && existingRepo != nil {
383 l.Info("repo exists")
384 s.pages.Notice(w, "repo", fmt.Sprintf("You already have a repository by this name on %s", existingRepo.Knot))
385 return
386 }
387
388 // create atproto record for this repo
389 rkey := tid.TID()
390 repo := &db.Repo{
391 Did: user.Did,
392 Name: repoName,
393 Knot: domain,
394 Rkey: rkey,
395 Description: description,
396 }
397
398 xrpcClient, err := s.oauth.AuthorizedClient(r)
399 if err != nil {
400 l.Info("PDS write failed", "err", err)
401 s.pages.Notice(w, "repo", "Failed to write record to PDS.")
402 return
403 }
404
405 createdAt := time.Now().Format(time.RFC3339)
406 atresp, err := xrpcClient.RepoPutRecord(r.Context(), &comatproto.RepoPutRecord_Input{
407 Collection: tangled.RepoNSID,
408 Repo: user.Did,
409 Rkey: rkey,
410 Record: &lexutil.LexiconTypeDecoder{
411 Val: &tangled.Repo{
412 Knot: repo.Knot,
413 Name: repoName,
414 CreatedAt: createdAt,
415 Owner: user.Did,
416 }},
417 })
418 if err != nil {
419 l.Info("PDS write failed", "err", err)
420 s.pages.Notice(w, "repo", "Failed to announce repository creation.")
421 return
422 }
423
424 aturi := atresp.Uri
425 l = l.With("aturi", aturi)
426 l.Info("wrote to PDS")
427
428 tx, err := s.db.BeginTx(r.Context(), nil)
429 if err != nil {
430 l.Info("txn failed", "err", err)
431 s.pages.Notice(w, "repo", "Failed to save repository information.")
432 return
433 }
434
435 // The rollback function reverts a few things on failure:
436 // - the pending txn
437 // - the ACLs
438 // - the atproto record created
439 rollback := func() {
440 err1 := tx.Rollback()
441 err2 := s.enforcer.E.LoadPolicy()
442 err3 := rollbackRecord(context.Background(), aturi, xrpcClient)
443
444 // ignore txn complete errors, this is okay
445 if errors.Is(err1, sql.ErrTxDone) {
446 err1 = nil
447 }
448
449 if errs := errors.Join(err1, err2, err3); errs != nil {
450 l.Error("failed to rollback changes", "errs", errs)
451 return
452 }
453 }
454 defer rollback()
455
456 client, err := s.oauth.ServiceClient(
457 r,
458 oauth.WithService(domain),
459 oauth.WithLxm(tangled.RepoCreateNSID),
460 oauth.WithDev(s.config.Core.Dev),
461 )
462 if err != nil {
463 l.Error("service auth failed", "err", err)
464 s.pages.Notice(w, "repo", "Failed to reach PDS.")
465 return
466 }
467
468 xe := tangled.RepoCreate(
469 r.Context(),
470 client,
471 &tangled.RepoCreate_Input{
472 Rkey: rkey,
473 },
474 )
475 if err := xrpcclient.HandleXrpcErr(xe); err != nil {
476 l.Error("xrpc error", "xe", xe)
477 s.pages.Notice(w, "repo", err.Error())
478 return
479 }
480
481 err = db.AddRepo(tx, repo)
482 if err != nil {
483 l.Error("db write failed", "err", err)
484 s.pages.Notice(w, "repo", "Failed to save repository information.")
485 return
486 }
487
488 // acls
489 p, _ := securejoin.SecureJoin(user.Did, repoName)
490 err = s.enforcer.AddRepo(user.Did, domain, p)
491 if err != nil {
492 l.Error("acl setup failed", "err", err)
493 s.pages.Notice(w, "repo", "Failed to set up repository permissions.")
494 return
495 }
496
497 err = tx.Commit()
498 if err != nil {
499 l.Error("txn commit failed", "err", err)
500 http.Error(w, err.Error(), http.StatusInternalServerError)
501 return
502 }
503
504 err = s.enforcer.E.SavePolicy()
505 if err != nil {
506 l.Error("acl save failed", "err", err)
507 http.Error(w, err.Error(), http.StatusInternalServerError)
508 return
509 }
510
511 // reset the ATURI because the transaction completed successfully
512 aturi = ""
513
514 s.notifier.NewRepo(r.Context(), repo)
515 s.pages.HxLocation(w, fmt.Sprintf("/@%s/%s", user.Handle, repoName))
516 }
517}
518
519// this is used to rollback changes made to the PDS
520//
521// it is a no-op if the provided ATURI is empty
522func rollbackRecord(ctx context.Context, aturi string, xrpcc *xrpcclient.Client) error {
523 if aturi == "" {
524 return nil
525 }
526
527 parsed := syntax.ATURI(aturi)
528
529 collection := parsed.Collection().String()
530 repo := parsed.Authority().String()
531 rkey := parsed.RecordKey().String()
532
533 _, err := xrpcc.RepoDeleteRecord(ctx, &comatproto.RepoDeleteRecord_Input{
534 Collection: collection,
535 Repo: repo,
536 Rkey: rkey,
537 })
538 return err
539}