1// SPDX-License-Identifier: AGPL-3.0-or-later
2
3package ports
4
5import (
6 "context"
7 "errors"
8 "io"
9 "time"
10
11 "bnema.dev/ermite/internal/domain"
12)
13
14// The interfaces below are the use cases as the inbound adapters (the API,
15// Git over HTTP, the web) and the composition root see them. The types of package
16// usecase implement them, each assertion being made in usecase; the mocks in
17// ports/mocks stand in for them in the tests of the adapters.
18
19// AuthService turns the secret of a request into a principal. It returns
20// domain.ErrUnauthenticated for a secret that is not valid. *usecase.Auth
21// implements it.
22type AuthService interface {
23 Authenticate(ctx context.Context, secret string) (domain.Principal, error)
24}
25
26// Revalidator confirms that a principal obtained earlier is still
27// authorized. *usecase.Auth implements it.
28type Revalidator interface {
29 Revalidate(ctx context.Context, p domain.Principal) error
30}
31
32// RepoLookup is the read side of a single repository. A repository the
33// principal may not read is domain.ErrNotFound. *usecase.Repos implements it, as
34// part of RepoService.
35type RepoLookup interface {
36 Get(ctx context.Context, p domain.Principal, name domain.RepoName) (domain.Repo, error)
37}
38
39// RepoService is the repository use cases the API serves. *usecase.Repos
40// implements it.
41type RepoService interface {
42 RepoLookup
43 ListPage(ctx context.Context, p domain.Principal, size int, token string) (RepoPage, error)
44 View(ctx context.Context, repo domain.Repo) (RepoView, error)
45 Create(ctx context.Context, p domain.Principal, params CreateRepoParams) (domain.Repo, error)
46 Update(ctx context.Context, p domain.Principal, name domain.RepoName, params UpdateRepoParams) (domain.Repo, error)
47 Delete(ctx context.Context, p domain.Principal, name domain.RepoName) error
48}
49
50// TokenService is the access token use cases the API serves. *usecase.Tokens
51// implements it.
52type TokenService interface {
53 Create(ctx context.Context, p domain.Principal, params CreateTokenParams) (CreatedToken, error)
54 ListPage(ctx context.Context, p domain.Principal, size int, token string) (TokenPage, error)
55 Revoke(ctx context.Context, p domain.Principal, id string) error
56}
57
58// GitHubAPIService is the subset of GitHub's REST API that ermite serves under
59// /-/github/api, for the actions that run on it (ADR 0025, CI-2). owner is the
60// owner of the URL: only ERMITE_OWNER names repositories, any other owner is
61// domain.ErrNotFound, as is a repository the principal may not read.
62// *usecase.CI implements it.
63type GitHubAPIService interface {
64 // GetRepo returns the JSON of GET /repos/{owner}/{repo}.
65 GetRepo(ctx context.Context, p domain.Principal, owner, repo string) ([]byte, error)
66 // HashAlgorithm returns the object format of the repository, "sha1".
67 HashAlgorithm(ctx context.Context, p domain.Principal, owner, repo string) (string, error)
68 // Tarball resolves ref (a branch, a tag or a commit id; empty means the
69 // default branch) and writes the gzip-compressed tar of the commit to the
70 // writer that begin returns; the archive token of an action (see
71 // domain.RepoTokenPrincipal) gets the commit it was issued for and no other.
72 // begin is called once, with the file name of the
73 // archive, before the first byte and not at all when the ref does not
74 // resolve (domain.ErrNotFound).
75 Tarball(ctx context.Context, p domain.Principal, owner, repo, ref string, begin func(filename string) io.Writer) error
76 // TarballName is Tarball for a HEAD request: the same access and the same
77 // resolution of ref, then the file name, without producing the archive.
78 TarballName(ctx context.Context, p domain.Principal, owner, repo, ref string) (string, error)
79 // ListPullFiles answers GET /repos/{owner}/{repo}/pulls/{number}/files: the
80 // JSON array of the files of page (1-based) of perPage files (1 to 100) of
81 // the merge request, and the Link header value ("" for a single page). A
82 // public repository is read by anyone; a private one by a principal that
83 // reads it. The job token of the repository needs pull-requests: read; one
84 // that reads the repository without it gets domain.ErrForbidden (GitHub: 403
85 // "Resource not accessible by integration").
86 ListPullFiles(ctx context.Context, p domain.Principal, owner, repo string, number int64, page, perPage int) (body []byte, link string, err error)
87}
88
89// BrowseService is the read side of a repository's content. *usecase.Browse
90// implements it.
91type BrowseService interface {
92 ListRefs(ctx context.Context, p domain.Principal, repo domain.RepoName, params ListRefsParams) (RefPage, error)
93 ResolveRevision(ctx context.Context, p domain.Principal, repo domain.RepoName, rev domain.Revision) (domain.ResolvedRevision, error)
94 GetTree(ctx context.Context, p domain.Principal, repo domain.RepoName, rev domain.Revision, path domain.TreePath, includeLastCommit bool) (domain.Tree, error)
95 ListPaths(ctx context.Context, p domain.Principal, repo domain.RepoName, rev domain.Revision) (domain.PathList, error)
96 OpenBlob(ctx context.Context, p domain.Principal, repo domain.RepoName, rev domain.Revision, path domain.TreePath) (domain.BlobInfo, io.ReadCloser, error)
97 ListCommits(ctx context.Context, p domain.Principal, repo domain.RepoName, params ListCommitsParams) (HistoryPage, error)
98 GetCommit(ctx context.Context, p domain.Principal, repo domain.RepoName, rev domain.Revision) (domain.CommitDetail, error)
99}
100
101// EventService streams the events of the forge. *usecase.Events implements it.
102type EventService interface {
103 Watch(ctx context.Context, p domain.Principal, params WatchParams, send func(WatchEvent) error) error
104}
105
106// MergeRequestService is the merge request use cases. *usecase.MergeRequests
107// implements it.
108type MergeRequestService interface {
109 Create(ctx context.Context, p domain.Principal, name domain.RepoName, params CreateMergeRequestParams) (domain.MergeRequest, error)
110 List(ctx context.Context, p domain.Principal, name domain.RepoName, params ListMergeRequestsParams) (MergeRequestPage, error)
111 Get(ctx context.Context, p domain.Principal, name domain.RepoName, number int64, sinceLastRead bool) (MergeRequestDetail, error)
112 AddComment(ctx context.Context, p domain.Principal, name domain.RepoName, number int64, params AddCommentParams) (domain.Comment, error)
113 ResolveComment(ctx context.Context, p domain.Principal, name domain.RepoName, number, commentID int64, resolved bool) (domain.Comment, error)
114 Close(ctx context.Context, p domain.Principal, name domain.RepoName, number int64) (domain.MergeRequest, error)
115 MarkRead(ctx context.Context, p domain.Principal, name domain.RepoName, number int64, head domain.ObjectID) (domain.ObjectID, error)
116 Merge(ctx context.Context, p domain.Principal, name domain.RepoName, number int64, params MergeParams) (MergeResult, error)
117}
118
119// SigningKeyService tells which key signs the commits of the forge.
120// *usecase.SigningKey implements it.
121type SigningKeyService interface {
122 Info() domain.SigningKeyInfo
123}
124
125// SessionService is the owner's web session use cases the API serves.
126// *usecase.Sessions implements it.
127type SessionService interface {
128 CreateLoginLink(ctx context.Context, p domain.Principal) (LoginLink, error)
129 SignOutEverywhere(ctx context.Context, p domain.Principal) error
130}
131
132// ErrLinkRejected is what WebSessionService.Login returns for a link that is
133// unknown, expired or already used.
134var ErrLinkRejected = errors.New("login link rejected")
135
136// WebSessionService is the session side of the use cases, as the web needs
137// it. The composition root implements it over *usecase.Sessions.
138type WebSessionService interface {
139 // LoginLinkValid reports whether the link is pending, without using it.
140 LoginLinkValid(nonce string) bool
141 // Login uses the link and returns the session token and how long it
142 // lasts, or ErrLinkRejected.
143 Login(ctx context.Context, nonce string) (token string, lifetime time.Duration, err error)
144 // Verify checks a session token. When it is valid it returns the owner,
145 // the principal the web passes to the use cases for that request; when it
146 // is not, ok is false and err nil. An error means the check could not be
147 // made (the request then runs as anonymous).
148 Verify(ctx context.Context, token string) (owner domain.Principal, ok bool, err error)
149}
150
151// PasskeyService is the owner's passkey use cases the API serves.
152// *usecase.Passkeys implements it. Registering a passkey and signing in with
153// one are browser ceremonies and are not part of it.
154type PasskeyService interface {
155 // List returns the passkeys, oldest first.
156 List(ctx context.Context, p domain.Principal) ([]domain.Passkey, error)
157 // Remove deletes the passkey with that credential id, or returns
158 // domain.ErrNotFound, and signs every browser out.
159 Remove(ctx context.Context, p domain.Principal, id []byte) error
160}
161
162// WebPasskeyService is the passkey side of the use cases, as the web needs
163// it: the API's List and Remove, and the browser ceremonies. The composition
164// root implements it over *usecase.Passkeys. A ceremony is the opaque
165// identifier BeginLogin and BeginRegistration return; options is the JSON the
166// browser passes to the WebAuthn API.
167type WebPasskeyService interface {
168 PasskeyService
169 // BeginLogin starts a sign-in. Anonymous callers may. client is the client
170 // key of the request (clientlimit.Key of the address the failure limiter
171 // uses); it bounds how many sign-ins a client keeps waiting.
172 BeginLogin(ctx context.Context, client string) (ceremony string, options []byte, err error)
173 // FinishLogin checks the browser's response and returns the session token
174 // and how long it lasts, or ErrLinkRejected for any refusal.
175 FinishLogin(ctx context.Context, ceremony string, response []byte) (token string, lifetime time.Duration, err error)
176 // BeginRegistration starts adding a passkey. Only the owner may. name is
177 // the name the passkey will get (empty means the default): a name that
178 // breaks the rules is refused here, before any ceremony starts, and is the
179 // one FinishRegistration stores.
180 BeginRegistration(ctx context.Context, p domain.Principal, name string) (ceremony string, options []byte, err error)
181 // FinishRegistration checks the browser's response and stores the passkey
182 // under the name given to BeginRegistration.
183 FinishRegistration(ctx context.Context, p domain.Principal, ceremony string, response []byte) error
184}
185
186// PushService opens a repository for a push: it is domain.ErrUnauthenticated
187// for an anonymous caller, domain.ErrNotFound for a repository the caller may
188// not write and cannot see (or that is missing and may not be created),
189// domain.ErrForbidden for one it can see but not write. With create, a
190// missing repository the principal may write is created. *usecase.Pushes
191// implements it.
192type PushService interface {
193 Open(ctx context.Context, p domain.Principal, name domain.RepoName, create bool) error
194}
195
196// PushHookService is what the hook socket asks of the use cases.
197// *usecase.Pushes implements it.
198type PushHookService interface {
199 // Check decides a push before Git applies it; an error matching
200 // domain.ErrRejected refuses it, any other error refuses it as a failure.
201 // objects are the objects of the push in progress (the quarantine of git).
202 Check(ctx context.Context, p domain.Principal, name domain.RepoName, updates []domain.RefUpdate, objects PushObjects) error
203 // Record handles an accepted push.
204 Record(ctx context.Context, p domain.Principal, name domain.RepoName, updates []domain.RefUpdate) error
205}
206
207// MaintenanceScheduler queues repository maintenance. *usecase.Maintainer
208// implements it.
209type MaintenanceScheduler interface {
210 Schedule(ctx context.Context, name domain.RepoName)
211}
212
213// HookTokens hands out the per-request tokens the hooks of a push present
214// back to ermite, and the socket they present them on. The Git HTTP adapter
215// implements it.
216type HookTokens interface {
217 // Register binds a new token to the repository and principal of a push.
218 // release revokes it and must be called when the request ends.
219 Register(ctx context.Context, repo domain.RepoName, p domain.Principal) (token string, release func())
220 // Socket is the path of the hook socket.
221 Socket() string
222}
223
224// FailureLimiter counts the failed authentications per client. The adapters
225// that authenticate share one, so that a client has one budget of failures.
226// *clientlimit.Limiter implements it.
227type FailureLimiter interface {
228 Blocked(ctx context.Context, addr string) (bool, time.Duration)
229 Fail(ctx context.Context, addr string)
230}
231
232// SecretPage is one page of secrets.
233type SecretPage struct {
234 Secrets []domain.Secret
235 NextPageToken string
236}
237
238// VariablePage is one page of variables.
239type VariablePage struct {
240 Variables []domain.Variable
241 NextPageToken string
242}
243
244// EnvironmentPage is one page of environments.
245type EnvironmentPage struct {
246 Environments []domain.Environment
247 NextPageToken string
248}
249
250// SecretService is the secret use cases the API serves. They need the
251// secrets:write scope, never on a token limited to branches. Values are never
252// returned. *usecase.CISettings implements it.
253type SecretService interface {
254 SetSecret(ctx context.Context, p domain.Principal, scope domain.SettingsScope, name, value string) (domain.Secret, error)
255 ListSecrets(ctx context.Context, p domain.Principal, scope domain.SettingsScope, size int, token string) (SecretPage, error)
256 DeleteSecret(ctx context.Context, p domain.Principal, scope domain.SettingsScope, name string) error
257}
258
259// VariableService is the variable use cases the API serves, with the access
260// rules of SecretService. *usecase.CISettings implements it.
261type VariableService interface {
262 SetVariable(ctx context.Context, p domain.Principal, scope domain.SettingsScope, name, value string) (domain.Variable, error)
263 GetVariable(ctx context.Context, p domain.Principal, scope domain.SettingsScope, name string) (domain.Variable, error)
264 ListVariables(ctx context.Context, p domain.Principal, scope domain.SettingsScope, size int, token string) (VariablePage, error)
265 DeleteVariable(ctx context.Context, p domain.Principal, scope domain.SettingsScope, name string) error
266}
267
268// EnvironmentService is the environment use cases the API serves, with the
269// access rules of SecretService. *usecase.CISettings implements it.
270type EnvironmentService interface {
271 CreateEnvironment(ctx context.Context, p domain.Principal, repo domain.RepoName, name string) (domain.Environment, error)
272 ListEnvironments(ctx context.Context, p domain.Principal, repo domain.RepoName, size int, token string) (EnvironmentPage, error)
273 DeleteEnvironment(ctx context.Context, p domain.Principal, repo domain.RepoName, name string) error
274}