kot.pink
1package state
2
3import (
4 "context"
5 "fmt"
6 "log"
7 "log/slog"
8 "net/http"
9 "strings"
10 "time"
11
12 comatproto "github.com/bluesky-social/indigo/api/atproto"
13 lexutil "github.com/bluesky-social/indigo/lex/util"
14 securejoin "github.com/cyphar/filepath-securejoin"
15 "github.com/go-chi/chi/v5"
16 "github.com/posthog/posthog-go"
17 "tangled.sh/tangled.sh/core/api/tangled"
18 "tangled.sh/tangled.sh/core/appview"
19 "tangled.sh/tangled.sh/core/appview/cache"
20 "tangled.sh/tangled.sh/core/appview/cache/session"
21 "tangled.sh/tangled.sh/core/appview/config"
22 "tangled.sh/tangled.sh/core/appview/db"
23 "tangled.sh/tangled.sh/core/appview/notify"
24 "tangled.sh/tangled.sh/core/appview/oauth"
25 "tangled.sh/tangled.sh/core/appview/pages"
26 posthogService "tangled.sh/tangled.sh/core/appview/posthog"
27 "tangled.sh/tangled.sh/core/appview/reporesolver"
28 "tangled.sh/tangled.sh/core/eventconsumer"
29 "tangled.sh/tangled.sh/core/idresolver"
30 "tangled.sh/tangled.sh/core/jetstream"
31 "tangled.sh/tangled.sh/core/knotclient"
32 tlog "tangled.sh/tangled.sh/core/log"
33 "tangled.sh/tangled.sh/core/rbac"
34 "tangled.sh/tangled.sh/core/tid"
35)
36
37type State struct {
38 db *db.DB
39 notifier notify.Notifier
40 oauth *oauth.OAuth
41 enforcer *rbac.Enforcer
42 pages *pages.Pages
43 sess *session.SessionStore
44 idResolver *idresolver.Resolver
45 posthog posthog.Client
46 jc *jetstream.JetstreamClient
47 config *config.Config
48 repoResolver *reporesolver.RepoResolver
49 knotstream *eventconsumer.Consumer
50 spindlestream *eventconsumer.Consumer
51}
52
53func Make(ctx context.Context, config *config.Config) (*State, error) {
54 d, err := db.Make(config.Core.DbPath)
55 if err != nil {
56 return nil, fmt.Errorf("failed to create db: %w", err)
57 }
58
59 enforcer, err := rbac.NewEnforcer(config.Core.DbPath)
60 if err != nil {
61 return nil, fmt.Errorf("failed to create enforcer: %w", err)
62 }
63
64 res, err := idresolver.RedisResolver(config.Redis.ToURL())
65 if err != nil {
66 log.Printf("failed to create redis resolver: %v", err)
67 res = idresolver.DefaultResolver()
68 }
69
70 pgs := pages.NewPages(config, res)
71
72 cache := cache.New(config.Redis.Addr)
73 sess := session.New(cache)
74
75 oauth := oauth.NewOAuth(config, sess)
76
77 posthog, err := posthog.NewWithConfig(config.Posthog.ApiKey, posthog.Config{Endpoint: config.Posthog.Endpoint})
78 if err != nil {
79 return nil, fmt.Errorf("failed to create posthog client: %w", err)
80 }
81
82 repoResolver := reporesolver.New(config, enforcer, res, d)
83
84 wrapper := db.DbWrapper{d}
85 jc, err := jetstream.NewJetstreamClient(
86 config.Jetstream.Endpoint,
87 "appview",
88 []string{
89 tangled.GraphFollowNSID,
90 tangled.FeedStarNSID,
91 tangled.PublicKeyNSID,
92 tangled.RepoArtifactNSID,
93 tangled.ActorProfileNSID,
94 tangled.SpindleMemberNSID,
95 tangled.SpindleNSID,
96 tangled.StringNSID,
97 },
98 nil,
99 slog.Default(),
100 wrapper,
101 false,
102
103 // in-memory filter is inapplicalble to appview so
104 // we'll never log dids anyway.
105 false,
106 )
107 if err != nil {
108 return nil, fmt.Errorf("failed to create jetstream client: %w", err)
109 }
110
111 ingester := appview.Ingester{
112 Db: wrapper,
113 Enforcer: enforcer,
114 IdResolver: res,
115 Config: config,
116 Logger: tlog.New("ingester"),
117 }
118 err = jc.StartJetstream(ctx, ingester.Ingest())
119 if err != nil {
120 return nil, fmt.Errorf("failed to start jetstream watcher: %w", err)
121 }
122
123 knotstream, err := Knotstream(ctx, config, d, enforcer, posthog)
124 if err != nil {
125 return nil, fmt.Errorf("failed to start knotstream consumer: %w", err)
126 }
127 knotstream.Start(ctx)
128
129 spindlestream, err := Spindlestream(ctx, config, d, enforcer)
130 if err != nil {
131 return nil, fmt.Errorf("failed to start spindlestream consumer: %w", err)
132 }
133 spindlestream.Start(ctx)
134
135 var notifiers []notify.Notifier
136 if !config.Core.Dev {
137 notifiers = append(notifiers, posthogService.NewPosthogNotifier(posthog))
138 }
139 notifier := notify.NewMergedNotifier(notifiers...)
140
141 state := &State{
142 d,
143 notifier,
144 oauth,
145 enforcer,
146 pgs,
147 sess,
148 res,
149 posthog,
150 jc,
151 config,
152 repoResolver,
153 knotstream,
154 spindlestream,
155 }
156
157 return state, nil
158}
159
160func (s *State) Favicon(w http.ResponseWriter, r *http.Request) {
161 w.Header().Set("Content-Type", "image/svg+xml")
162 w.Header().Set("Cache-Control", "public, max-age=31536000") // one year
163 w.Header().Set("ETag", `"favicon-svg-v1"`)
164
165 if match := r.Header.Get("If-None-Match"); match == `"favicon-svg-v1"` {
166 w.WriteHeader(http.StatusNotModified)
167 return
168 }
169
170 s.pages.Favicon(w)
171}
172
173func (s *State) TermsOfService(w http.ResponseWriter, r *http.Request) {
174 user := s.oauth.GetUser(r)
175 s.pages.TermsOfService(w, pages.TermsOfServiceParams{
176 LoggedInUser: user,
177 })
178}
179
180func (s *State) PrivacyPolicy(w http.ResponseWriter, r *http.Request) {
181 user := s.oauth.GetUser(r)
182 s.pages.PrivacyPolicy(w, pages.PrivacyPolicyParams{
183 LoggedInUser: user,
184 })
185}
186
187func (s *State) Timeline(w http.ResponseWriter, r *http.Request) {
188 user := s.oauth.GetUser(r)
189
190 timeline, err := db.MakeTimeline(s.db)
191 if err != nil {
192 log.Println(err)
193 s.pages.Notice(w, "timeline", "Uh oh! Failed to load timeline.")
194 }
195
196 s.pages.Timeline(w, pages.TimelineParams{
197 LoggedInUser: user,
198 Timeline: timeline,
199 })
200}
201
202func (s *State) Keys(w http.ResponseWriter, r *http.Request) {
203 user := chi.URLParam(r, "user")
204 user = strings.TrimPrefix(user, "@")
205
206 if user == "" {
207 w.WriteHeader(http.StatusBadRequest)
208 return
209 }
210
211 id, err := s.idResolver.ResolveIdent(r.Context(), user)
212 if err != nil {
213 w.WriteHeader(http.StatusInternalServerError)
214 return
215 }
216
217 pubKeys, err := db.GetPublicKeysForDid(s.db, id.DID.String())
218 if err != nil {
219 w.WriteHeader(http.StatusNotFound)
220 return
221 }
222
223 if len(pubKeys) == 0 {
224 w.WriteHeader(http.StatusNotFound)
225 return
226 }
227
228 for _, k := range pubKeys {
229 key := strings.TrimRight(k.Key, "\n")
230 w.Write([]byte(fmt.Sprintln(key)))
231 }
232}
233
234func validateRepoName(name string) error {
235 // check for path traversal attempts
236 if name == "." || name == ".." ||
237 strings.Contains(name, "/") || strings.Contains(name, "\\") {
238 return fmt.Errorf("Repository name contains invalid path characters")
239 }
240
241 // check for sequences that could be used for traversal when normalized
242 if strings.Contains(name, "./") || strings.Contains(name, "../") ||
243 strings.HasPrefix(name, ".") || strings.HasSuffix(name, ".") {
244 return fmt.Errorf("Repository name contains invalid path sequence")
245 }
246
247 // then continue with character validation
248 for _, char := range name {
249 if !((char >= 'a' && char <= 'z') ||
250 (char >= 'A' && char <= 'Z') ||
251 (char >= '0' && char <= '9') ||
252 char == '-' || char == '_' || char == '.') {
253 return fmt.Errorf("Repository name can only contain alphanumeric characters, periods, hyphens, and underscores")
254 }
255 }
256
257 // additional check to prevent multiple sequential dots
258 if strings.Contains(name, "..") {
259 return fmt.Errorf("Repository name cannot contain sequential dots")
260 }
261
262 // if all checks pass
263 return nil
264}
265
266func stripGitExt(name string) string {
267 return strings.TrimSuffix(name, ".git")
268}
269
270func (s *State) NewRepo(w http.ResponseWriter, r *http.Request) {
271 switch r.Method {
272 case http.MethodGet:
273 user := s.oauth.GetUser(r)
274 knots, err := s.enforcer.GetKnotsForUser(user.Did)
275 if err != nil {
276 s.pages.Notice(w, "repo", "Invalid user account.")
277 return
278 }
279
280 s.pages.NewRepo(w, pages.NewRepoParams{
281 LoggedInUser: user,
282 Knots: knots,
283 })
284
285 case http.MethodPost:
286 user := s.oauth.GetUser(r)
287
288 domain := r.FormValue("domain")
289 if domain == "" {
290 s.pages.Notice(w, "repo", "Invalid form submission—missing knot domain.")
291 return
292 }
293
294 repoName := r.FormValue("name")
295 if repoName == "" {
296 s.pages.Notice(w, "repo", "Repository name cannot be empty.")
297 return
298 }
299
300 if err := validateRepoName(repoName); err != nil {
301 s.pages.Notice(w, "repo", err.Error())
302 return
303 }
304
305 repoName = stripGitExt(repoName)
306
307 defaultBranch := r.FormValue("branch")
308 if defaultBranch == "" {
309 defaultBranch = "main"
310 }
311
312 description := r.FormValue("description")
313
314 ok, err := s.enforcer.E.Enforce(user.Did, domain, domain, "repo:create")
315 if err != nil || !ok {
316 s.pages.Notice(w, "repo", "You do not have permission to create a repo in this knot.")
317 return
318 }
319
320 existingRepo, err := db.GetRepo(s.db, user.Did, repoName)
321 if err == nil && existingRepo != nil {
322 s.pages.Notice(w, "repo", fmt.Sprintf("A repo by this name already exists on %s", existingRepo.Knot))
323 return
324 }
325
326 secret, err := db.GetRegistrationKey(s.db, domain)
327 if err != nil {
328 s.pages.Notice(w, "repo", fmt.Sprintf("No registration key found for knot %s.", domain))
329 return
330 }
331
332 client, err := knotclient.NewSignedClient(domain, secret, s.config.Core.Dev)
333 if err != nil {
334 s.pages.Notice(w, "repo", "Failed to connect to knot server.")
335 return
336 }
337
338 rkey := tid.TID()
339 repo := &db.Repo{
340 Did: user.Did,
341 Name: repoName,
342 Knot: domain,
343 Rkey: rkey,
344 Description: description,
345 }
346
347 xrpcClient, err := s.oauth.AuthorizedClient(r)
348 if err != nil {
349 s.pages.Notice(w, "repo", "Failed to write record to PDS.")
350 return
351 }
352
353 createdAt := time.Now().Format(time.RFC3339)
354 atresp, err := xrpcClient.RepoPutRecord(r.Context(), &comatproto.RepoPutRecord_Input{
355 Collection: tangled.RepoNSID,
356 Repo: user.Did,
357 Rkey: rkey,
358 Record: &lexutil.LexiconTypeDecoder{
359 Val: &tangled.Repo{
360 Knot: repo.Knot,
361 Name: repoName,
362 CreatedAt: createdAt,
363 Owner: user.Did,
364 }},
365 })
366 if err != nil {
367 log.Printf("failed to create record: %s", err)
368 s.pages.Notice(w, "repo", "Failed to announce repository creation.")
369 return
370 }
371 log.Println("created repo record: ", atresp.Uri)
372
373 tx, err := s.db.BeginTx(r.Context(), nil)
374 if err != nil {
375 log.Println(err)
376 s.pages.Notice(w, "repo", "Failed to save repository information.")
377 return
378 }
379 defer func() {
380 tx.Rollback()
381 err = s.enforcer.E.LoadPolicy()
382 if err != nil {
383 log.Println("failed to rollback policies")
384 }
385 }()
386
387 resp, err := client.NewRepo(user.Did, repoName, defaultBranch)
388 if err != nil {
389 s.pages.Notice(w, "repo", "Failed to create repository on knot server.")
390 return
391 }
392
393 switch resp.StatusCode {
394 case http.StatusConflict:
395 s.pages.Notice(w, "repo", "A repository with that name already exists.")
396 return
397 case http.StatusInternalServerError:
398 s.pages.Notice(w, "repo", "Failed to create repository on knot. Try again later.")
399 case http.StatusNoContent:
400 // continue
401 }
402
403 err = db.AddRepo(tx, repo)
404 if err != nil {
405 log.Println(err)
406 s.pages.Notice(w, "repo", "Failed to save repository information.")
407 return
408 }
409
410 // acls
411 p, _ := securejoin.SecureJoin(user.Did, repoName)
412 err = s.enforcer.AddRepo(user.Did, domain, p)
413 if err != nil {
414 log.Println(err)
415 s.pages.Notice(w, "repo", "Failed to set up repository permissions.")
416 return
417 }
418
419 err = tx.Commit()
420 if err != nil {
421 log.Println("failed to commit changes", err)
422 http.Error(w, err.Error(), http.StatusInternalServerError)
423 return
424 }
425
426 err = s.enforcer.E.SavePolicy()
427 if err != nil {
428 log.Println("failed to update ACLs", err)
429 http.Error(w, err.Error(), http.StatusInternalServerError)
430 return
431 }
432
433 s.notifier.NewRepo(r.Context(), repo)
434
435 s.pages.HxLocation(w, fmt.Sprintf("/@%s/%s", user.Handle, repoName))
436 return
437 }
438}