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) TermsOfService(w http.ResponseWriter, r *http.Request) {
161 user := s.oauth.GetUser(r)
162 s.pages.TermsOfService(w, pages.TermsOfServiceParams{
163 LoggedInUser: user,
164 })
165}
166
167func (s *State) PrivacyPolicy(w http.ResponseWriter, r *http.Request) {
168 user := s.oauth.GetUser(r)
169 s.pages.PrivacyPolicy(w, pages.PrivacyPolicyParams{
170 LoggedInUser: user,
171 })
172}
173
174func (s *State) Timeline(w http.ResponseWriter, r *http.Request) {
175 user := s.oauth.GetUser(r)
176
177 timeline, err := db.MakeTimeline(s.db)
178 if err != nil {
179 log.Println(err)
180 s.pages.Notice(w, "timeline", "Uh oh! Failed to load timeline.")
181 }
182
183 s.pages.Timeline(w, pages.TimelineParams{
184 LoggedInUser: user,
185 Timeline: timeline,
186 })
187}
188
189func (s *State) Keys(w http.ResponseWriter, r *http.Request) {
190 user := chi.URLParam(r, "user")
191 user = strings.TrimPrefix(user, "@")
192
193 if user == "" {
194 w.WriteHeader(http.StatusBadRequest)
195 return
196 }
197
198 id, err := s.idResolver.ResolveIdent(r.Context(), user)
199 if err != nil {
200 w.WriteHeader(http.StatusInternalServerError)
201 return
202 }
203
204 pubKeys, err := db.GetPublicKeysForDid(s.db, id.DID.String())
205 if err != nil {
206 w.WriteHeader(http.StatusNotFound)
207 return
208 }
209
210 if len(pubKeys) == 0 {
211 w.WriteHeader(http.StatusNotFound)
212 return
213 }
214
215 for _, k := range pubKeys {
216 key := strings.TrimRight(k.Key, "\n")
217 w.Write([]byte(fmt.Sprintln(key)))
218 }
219}
220
221func validateRepoName(name string) error {
222 // check for path traversal attempts
223 if name == "." || name == ".." ||
224 strings.Contains(name, "/") || strings.Contains(name, "\\") {
225 return fmt.Errorf("Repository name contains invalid path characters")
226 }
227
228 // check for sequences that could be used for traversal when normalized
229 if strings.Contains(name, "./") || strings.Contains(name, "../") ||
230 strings.HasPrefix(name, ".") || strings.HasSuffix(name, ".") {
231 return fmt.Errorf("Repository name contains invalid path sequence")
232 }
233
234 // then continue with character validation
235 for _, char := range name {
236 if !((char >= 'a' && char <= 'z') ||
237 (char >= 'A' && char <= 'Z') ||
238 (char >= '0' && char <= '9') ||
239 char == '-' || char == '_' || char == '.') {
240 return fmt.Errorf("Repository name can only contain alphanumeric characters, periods, hyphens, and underscores")
241 }
242 }
243
244 // additional check to prevent multiple sequential dots
245 if strings.Contains(name, "..") {
246 return fmt.Errorf("Repository name cannot contain sequential dots")
247 }
248
249 // if all checks pass
250 return nil
251}
252
253func (s *State) NewRepo(w http.ResponseWriter, r *http.Request) {
254 switch r.Method {
255 case http.MethodGet:
256 user := s.oauth.GetUser(r)
257 knots, err := s.enforcer.GetKnotsForUser(user.Did)
258 if err != nil {
259 s.pages.Notice(w, "repo", "Invalid user account.")
260 return
261 }
262
263 s.pages.NewRepo(w, pages.NewRepoParams{
264 LoggedInUser: user,
265 Knots: knots,
266 })
267
268 case http.MethodPost:
269 user := s.oauth.GetUser(r)
270
271 domain := r.FormValue("domain")
272 if domain == "" {
273 s.pages.Notice(w, "repo", "Invalid form submission—missing knot domain.")
274 return
275 }
276
277 repoName := r.FormValue("name")
278 if repoName == "" {
279 s.pages.Notice(w, "repo", "Repository name cannot be empty.")
280 return
281 }
282
283 if err := validateRepoName(repoName); err != nil {
284 s.pages.Notice(w, "repo", err.Error())
285 return
286 }
287
288 defaultBranch := r.FormValue("branch")
289 if defaultBranch == "" {
290 defaultBranch = "main"
291 }
292
293 description := r.FormValue("description")
294
295 ok, err := s.enforcer.E.Enforce(user.Did, domain, domain, "repo:create")
296 if err != nil || !ok {
297 s.pages.Notice(w, "repo", "You do not have permission to create a repo in this knot.")
298 return
299 }
300
301 existingRepo, err := db.GetRepo(s.db, user.Did, repoName)
302 if err == nil && existingRepo != nil {
303 s.pages.Notice(w, "repo", fmt.Sprintf("A repo by this name already exists on %s", existingRepo.Knot))
304 return
305 }
306
307 secret, err := db.GetRegistrationKey(s.db, domain)
308 if err != nil {
309 s.pages.Notice(w, "repo", fmt.Sprintf("No registration key found for knot %s.", domain))
310 return
311 }
312
313 client, err := knotclient.NewSignedClient(domain, secret, s.config.Core.Dev)
314 if err != nil {
315 s.pages.Notice(w, "repo", "Failed to connect to knot server.")
316 return
317 }
318
319 rkey := tid.TID()
320 repo := &db.Repo{
321 Did: user.Did,
322 Name: repoName,
323 Knot: domain,
324 Rkey: rkey,
325 Description: description,
326 }
327
328 xrpcClient, err := s.oauth.AuthorizedClient(r)
329 if err != nil {
330 s.pages.Notice(w, "repo", "Failed to write record to PDS.")
331 return
332 }
333
334 createdAt := time.Now().Format(time.RFC3339)
335 atresp, err := xrpcClient.RepoPutRecord(r.Context(), &comatproto.RepoPutRecord_Input{
336 Collection: tangled.RepoNSID,
337 Repo: user.Did,
338 Rkey: rkey,
339 Record: &lexutil.LexiconTypeDecoder{
340 Val: &tangled.Repo{
341 Knot: repo.Knot,
342 Name: repoName,
343 CreatedAt: createdAt,
344 Owner: user.Did,
345 }},
346 })
347 if err != nil {
348 log.Printf("failed to create record: %s", err)
349 s.pages.Notice(w, "repo", "Failed to announce repository creation.")
350 return
351 }
352 log.Println("created repo record: ", atresp.Uri)
353
354 tx, err := s.db.BeginTx(r.Context(), nil)
355 if err != nil {
356 log.Println(err)
357 s.pages.Notice(w, "repo", "Failed to save repository information.")
358 return
359 }
360 defer func() {
361 tx.Rollback()
362 err = s.enforcer.E.LoadPolicy()
363 if err != nil {
364 log.Println("failed to rollback policies")
365 }
366 }()
367
368 resp, err := client.NewRepo(user.Did, repoName, defaultBranch)
369 if err != nil {
370 s.pages.Notice(w, "repo", "Failed to create repository on knot server.")
371 return
372 }
373
374 switch resp.StatusCode {
375 case http.StatusConflict:
376 s.pages.Notice(w, "repo", "A repository with that name already exists.")
377 return
378 case http.StatusInternalServerError:
379 s.pages.Notice(w, "repo", "Failed to create repository on knot. Try again later.")
380 case http.StatusNoContent:
381 // continue
382 }
383
384 repo.AtUri = atresp.Uri
385 err = db.AddRepo(tx, repo)
386 if err != nil {
387 log.Println(err)
388 s.pages.Notice(w, "repo", "Failed to save repository information.")
389 return
390 }
391
392 // acls
393 p, _ := securejoin.SecureJoin(user.Did, repoName)
394 err = s.enforcer.AddRepo(user.Did, domain, p)
395 if err != nil {
396 log.Println(err)
397 s.pages.Notice(w, "repo", "Failed to set up repository permissions.")
398 return
399 }
400
401 err = tx.Commit()
402 if err != nil {
403 log.Println("failed to commit changes", err)
404 http.Error(w, err.Error(), http.StatusInternalServerError)
405 return
406 }
407
408 err = s.enforcer.E.SavePolicy()
409 if err != nil {
410 log.Println("failed to update ACLs", err)
411 http.Error(w, err.Error(), http.StatusInternalServerError)
412 return
413 }
414
415 s.notifier.NewRepo(r.Context(), repo)
416
417 s.pages.HxLocation(w, fmt.Sprintf("/@%s/%s", user.Handle, repoName))
418 return
419 }
420}