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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) Timeline(w http.ResponseWriter, r *http.Request) {
196 user := s.oauth.GetUser(r)
197
198 timeline, err := db.MakeTimeline(s.db)
199 if err != nil {
200 log.Println(err)
201 s.pages.Notice(w, "timeline", "Uh oh! Failed to load timeline.")
202 }
203
204 repos, err := db.GetTopStarredReposLastWeek(s.db)
205 if err != nil {
206 log.Println(err)
207 s.pages.Notice(w, "topstarredrepos", "Unable to load.")
208 return
209 }
210
211 s.pages.Timeline(w, pages.TimelineParams{
212 LoggedInUser: user,
213 Timeline: timeline,
214 Repos: repos,
215 })
216}
217
218func (s *State) Keys(w http.ResponseWriter, r *http.Request) {
219 user := chi.URLParam(r, "user")
220 user = strings.TrimPrefix(user, "@")
221
222 if user == "" {
223 w.WriteHeader(http.StatusBadRequest)
224 return
225 }
226
227 id, err := s.idResolver.ResolveIdent(r.Context(), user)
228 if err != nil {
229 w.WriteHeader(http.StatusInternalServerError)
230 return
231 }
232
233 pubKeys, err := db.GetPublicKeysForDid(s.db, id.DID.String())
234 if err != nil {
235 w.WriteHeader(http.StatusNotFound)
236 return
237 }
238
239 if len(pubKeys) == 0 {
240 w.WriteHeader(http.StatusNotFound)
241 return
242 }
243
244 for _, k := range pubKeys {
245 key := strings.TrimRight(k.Key, "\n")
246 w.Write([]byte(fmt.Sprintln(key)))
247 }
248}
249
250func validateRepoName(name string) error {
251 // check for path traversal attempts
252 if name == "." || name == ".." ||
253 strings.Contains(name, "/") || strings.Contains(name, "\\") {
254 return fmt.Errorf("Repository name contains invalid path characters")
255 }
256
257 // check for sequences that could be used for traversal when normalized
258 if strings.Contains(name, "./") || strings.Contains(name, "../") ||
259 strings.HasPrefix(name, ".") || strings.HasSuffix(name, ".") {
260 return fmt.Errorf("Repository name contains invalid path sequence")
261 }
262
263 // then continue with character validation
264 for _, char := range name {
265 if !((char >= 'a' && char <= 'z') ||
266 (char >= 'A' && char <= 'Z') ||
267 (char >= '0' && char <= '9') ||
268 char == '-' || char == '_' || char == '.') {
269 return fmt.Errorf("Repository name can only contain alphanumeric characters, periods, hyphens, and underscores")
270 }
271 }
272
273 // additional check to prevent multiple sequential dots
274 if strings.Contains(name, "..") {
275 return fmt.Errorf("Repository name cannot contain sequential dots")
276 }
277
278 // if all checks pass
279 return nil
280}
281
282func stripGitExt(name string) string {
283 return strings.TrimSuffix(name, ".git")
284}
285
286func (s *State) NewRepo(w http.ResponseWriter, r *http.Request) {
287 switch r.Method {
288 case http.MethodGet:
289 user := s.oauth.GetUser(r)
290 knots, err := s.enforcer.GetKnotsForUser(user.Did)
291 if err != nil {
292 s.pages.Notice(w, "repo", "Invalid user account.")
293 return
294 }
295
296 s.pages.NewRepo(w, pages.NewRepoParams{
297 LoggedInUser: user,
298 Knots: knots,
299 })
300
301 case http.MethodPost:
302 l := s.logger.With("handler", "NewRepo")
303
304 user := s.oauth.GetUser(r)
305 l = l.With("did", user.Did)
306 l = l.With("handle", user.Handle)
307
308 // form validation
309 domain := r.FormValue("domain")
310 if domain == "" {
311 s.pages.Notice(w, "repo", "Invalid form submission—missing knot domain.")
312 return
313 }
314 l = l.With("knot", domain)
315
316 repoName := r.FormValue("name")
317 if repoName == "" {
318 s.pages.Notice(w, "repo", "Repository name cannot be empty.")
319 return
320 }
321
322 if err := validateRepoName(repoName); err != nil {
323 s.pages.Notice(w, "repo", err.Error())
324 return
325 }
326 repoName = stripGitExt(repoName)
327 l = l.With("repoName", repoName)
328
329 defaultBranch := r.FormValue("branch")
330 if defaultBranch == "" {
331 defaultBranch = "main"
332 }
333 l = l.With("defaultBranch", defaultBranch)
334
335 description := r.FormValue("description")
336
337 // ACL validation
338 ok, err := s.enforcer.E.Enforce(user.Did, domain, domain, "repo:create")
339 if err != nil || !ok {
340 l.Info("unauthorized")
341 s.pages.Notice(w, "repo", "You do not have permission to create a repo in this knot.")
342 return
343 }
344
345 // Check for existing repos
346 existingRepo, err := db.GetRepo(s.db, user.Did, repoName)
347 if err == nil && existingRepo != nil {
348 l.Info("repo exists")
349 s.pages.Notice(w, "repo", fmt.Sprintf("You already have a repository by this name on %s", existingRepo.Knot))
350 return
351 }
352
353 // create atproto record for this repo
354 rkey := tid.TID()
355 repo := &db.Repo{
356 Did: user.Did,
357 Name: repoName,
358 Knot: domain,
359 Rkey: rkey,
360 Description: description,
361 }
362
363 xrpcClient, err := s.oauth.AuthorizedClient(r)
364 if err != nil {
365 l.Info("PDS write failed", "err", err)
366 s.pages.Notice(w, "repo", "Failed to write record to PDS.")
367 return
368 }
369
370 createdAt := time.Now().Format(time.RFC3339)
371 atresp, err := xrpcClient.RepoPutRecord(r.Context(), &comatproto.RepoPutRecord_Input{
372 Collection: tangled.RepoNSID,
373 Repo: user.Did,
374 Rkey: rkey,
375 Record: &lexutil.LexiconTypeDecoder{
376 Val: &tangled.Repo{
377 Knot: repo.Knot,
378 Name: repoName,
379 CreatedAt: createdAt,
380 Owner: user.Did,
381 }},
382 })
383 if err != nil {
384 l.Info("PDS write failed", "err", err)
385 s.pages.Notice(w, "repo", "Failed to announce repository creation.")
386 return
387 }
388
389 aturi := atresp.Uri
390 l = l.With("aturi", aturi)
391 l.Info("wrote to PDS")
392
393 tx, err := s.db.BeginTx(r.Context(), nil)
394 if err != nil {
395 l.Info("txn failed", "err", err)
396 s.pages.Notice(w, "repo", "Failed to save repository information.")
397 return
398 }
399
400 // The rollback function reverts a few things on failure:
401 // - the pending txn
402 // - the ACLs
403 // - the atproto record created
404 rollback := func() {
405 err1 := tx.Rollback()
406 err2 := s.enforcer.E.LoadPolicy()
407 err3 := rollbackRecord(context.Background(), aturi, xrpcClient)
408
409 // ignore txn complete errors, this is okay
410 if errors.Is(err1, sql.ErrTxDone) {
411 err1 = nil
412 }
413
414 if errs := errors.Join(err1, err2, err3); errs != nil {
415 l.Error("failed to rollback changes", "errs", errs)
416 return
417 }
418 }
419 defer rollback()
420
421 client, err := s.oauth.ServiceClient(
422 r,
423 oauth.WithService(domain),
424 oauth.WithLxm(tangled.RepoCreateNSID),
425 oauth.WithDev(s.config.Core.Dev),
426 )
427 if err != nil {
428 l.Error("service auth failed", "err", err)
429 s.pages.Notice(w, "repo", "Failed to reach PDS.")
430 return
431 }
432
433 xe := tangled.RepoCreate(
434 r.Context(),
435 client,
436 &tangled.RepoCreate_Input{
437 Rkey: rkey,
438 },
439 )
440 if err := xrpcclient.HandleXrpcErr(xe); err != nil {
441 l.Error("xrpc error", "xe", xe)
442 s.pages.Notice(w, "repo", err.Error())
443 return
444 }
445
446 err = db.AddRepo(tx, repo)
447 if err != nil {
448 l.Error("db write failed", "err", err)
449 s.pages.Notice(w, "repo", "Failed to save repository information.")
450 return
451 }
452
453 // acls
454 p, _ := securejoin.SecureJoin(user.Did, repoName)
455 err = s.enforcer.AddRepo(user.Did, domain, p)
456 if err != nil {
457 l.Error("acl setup failed", "err", err)
458 s.pages.Notice(w, "repo", "Failed to set up repository permissions.")
459 return
460 }
461
462 err = tx.Commit()
463 if err != nil {
464 l.Error("txn commit failed", "err", err)
465 http.Error(w, err.Error(), http.StatusInternalServerError)
466 return
467 }
468
469 err = s.enforcer.E.SavePolicy()
470 if err != nil {
471 l.Error("acl save failed", "err", err)
472 http.Error(w, err.Error(), http.StatusInternalServerError)
473 return
474 }
475
476 // reset the ATURI because the transaction completed successfully
477 aturi = ""
478
479 s.notifier.NewRepo(r.Context(), repo)
480 s.pages.HxLocation(w, fmt.Sprintf("/@%s/%s", user.Handle, repoName))
481 }
482}
483
484// this is used to rollback changes made to the PDS
485//
486// it is a no-op if the provided ATURI is empty
487func rollbackRecord(ctx context.Context, aturi string, xrpcc *xrpcclient.Client) error {
488 if aturi == "" {
489 return nil
490 }
491
492 parsed := syntax.ATURI(aturi)
493
494 collection := parsed.Collection().String()
495 repo := parsed.Authority().String()
496 rkey := parsed.RecordKey().String()
497
498 _, err := xrpcc.RepoDeleteRecord(ctx, &comatproto.RepoDeleteRecord_Input{
499 Collection: collection,
500 Repo: repo,
501 Rkey: rkey,
502 })
503 return err
504}