| 1 | package slides |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "log/slog" |
| 6 | "time" |
| 7 | |
| 8 | "amadan.net/oficina/home/connect" |
| 9 | "amadan.net/oficina/home/handoff/seal" |
| 10 | "amadan.net/oficina/slides/internal/slides/core" |
| 11 | "amadan.net/oficina/slides/internal/slides/live" |
| 12 | "amadan.net/oficina/slides/internal/slides/present" |
| 13 | rauth "amadan.net/rastrillo/rastrillo/auth" |
| 14 | "amadan.net/rastrillo/rastrillo/db" |
| 15 | "amadan.net/rastrillo/rastrillo/jobs" |
| 16 | "amadan.net/rastrillo/rastrillo/sessions" |
| 17 | ) |
| 18 | |
| 19 | // app holds what every handler needs: the database, the logger, the |
| 20 | // RESOLVED config — every fail-closed default already applied, so |
| 21 | // a.cfg.Origin is the origin this app is really protecting and |
| 22 | // a.cfg.Mailer is the sender it is really using — the parsed allowlist, |
| 23 | // and the deck core. Config is also where the object store arrives |
| 24 | // (Config.Blobs) for the image screens that come next. |
| 25 | // |
| 26 | // The handlers themselves live beside what they serve: sign-in in |
| 27 | // auth.go, the deck screens in decks.go. |
| 28 | type app struct { |
| 29 | home *connect.Bridge |
| 30 | homeRoutes *connect.Routes |
| 31 | homeSessions *sessions.Sessions |
| 32 | // sessions reads the session cookie on a page outside the signed-in |
| 33 | // group (an error page, Open source, the share-link viewer), so the |
| 34 | // bar shows who is signed in there too. The same table and cookie |
| 35 | // rauth's own store uses; never used to sign anybody in. |
| 36 | sessions *sessions.Sessions |
| 37 | // directory is the hub directory (HOME_DIRECTORY_ORIGIN), set only |
| 38 | // with Home configured: the app switcher's "All apps" link. Empty, |
| 39 | // no switcher. |
| 40 | directory string |
| 41 | db *db.DB |
| 42 | logger *slog.Logger |
| 43 | cfg Config |
| 44 | allowed allowlist |
| 45 | // mail is the sign-in mail queue rauth sends through (mailqueue.go). |
| 46 | mail *mailQueue |
| 47 | // returnSeal authenticates the short-lived return_to cookie. It is |
| 48 | // derived from this instance's sign-in key, never from a browser |
| 49 | // value, and the clock is a seam for expiry tests. |
| 50 | returnSeal *seal.Sealer |
| 51 | returnNow func() time.Time |
| 52 | // core is the compiled deck core, shared by every request. |
| 53 | // Compiling the wasm module is expensive and instantiating it is |
| 54 | // not, so there is exactly one of these per process and a Handle |
| 55 | // (one module instance) per deck opened. |
| 56 | core *core.Runtime |
| 57 | // auth is the sign-in plugin, held for one thing the router |
| 58 | // cannot do: resolving a session cookie on a screen mounted |
| 59 | // OUTSIDE the signed-in group. RequireSession is what puts a |
| 60 | // session on the request context, so past it sessions.Current |
| 61 | // answers nothing — and the presenting screens (presentation.go) |
| 62 | // are all capability-addressed, reachable with no session at all, |
| 63 | // while still needing to know whether the person reading is the |
| 64 | // presenter. rauth's SessionFrom is that direct lookup. |
| 65 | auth *rauth.Auth |
| 66 | // hub is the in-process fan-out behind every live presentation: |
| 67 | // one command, every watching page told (internal/slides/present). |
| 68 | // One per app, because a subscriber list nobody else can reach is |
| 69 | // not a fan-out. |
| 70 | hub *present.Hub |
| 71 | // jobs is rastrillo's background-work registry and jobPages its |
| 72 | // three handlers (status page, polled fragment, SSE). One per app: |
| 73 | // a job is a goroutine in this process and the registry is how a |
| 74 | // person watches it (exports.go). |
| 75 | jobs *jobs.Jobs |
| 76 | jobPages *jobs.Handlers |
| 77 | // exports is what this app holds beside those jobs: the finished |
| 78 | // PDF, or the object-store key it was uploaded under, per job |
| 79 | // (exports.go). rastrillo/jobs carries a status and a sentence and |
| 80 | // deliberately nothing of the work's own result. |
| 81 | exports *exportStore |
| 82 | // pdf is the compiled PDF module, built on the first export and |
| 83 | // closed with the app. See pdfRuntime for why it is lazy where the |
| 84 | // deck core is not. |
| 85 | pdf *pdfRuntime |
| 86 | // live is the in-process fan-out behind every deck being EDITED: |
| 87 | // one accepted update announced as a seq, plus who is currently in |
| 88 | // the deck (internal/slides/live). Separate from hub above because |
| 89 | // they are separate subjects with separate lifetimes — a talk being |
| 90 | // given and a document being written — and folding them into one |
| 91 | // map keyed by two kinds of sqid would make every publish a |
| 92 | // question about which kind it was. |
| 93 | live *live.Hub |
| 94 | } |
| 95 | |
| 96 | // Close releases the compiled deck core's wazero runtime — the one |
| 97 | // resource New builds for itself rather than taking from its caller |
| 98 | // (newApp's doc comment: the database handle is the caller's, closed |
| 99 | // there). It does not close the database: New never opened it, so it |
| 100 | // is never this method's to release. |
| 101 | // |
| 102 | // New hands back the *app this closes alongside the mux it also |
| 103 | // returns; a caller that never stops (a long-running server whose |
| 104 | // process exit reclaims everything anyway) is free to ignore it, but |
| 105 | // cmd/slides/main.go's shutdown path and every test harness call it so |
| 106 | // a compiled module is not leaked per app built. |
| 107 | func (a *app) Close() error { |
| 108 | if a == nil { |
| 109 | return nil |
| 110 | } |
| 111 | // The live hub's sweeper is a goroutine, so it is stopped here for |
| 112 | // the same reason the runtime is closed here: a test binary builds |
| 113 | // one app per test, and a resource nobody releases is a leak per |
| 114 | // app rather than per process. |
| 115 | if a.live != nil { |
| 116 | a.live.Close() |
| 117 | } |
| 118 | // Queued sign-in links are sent before the process lets go. |
| 119 | if a.mail != nil { |
| 120 | a.mail.close() |
| 121 | } |
| 122 | // The PDF module, if any export ever built one. Same argument as |
| 123 | // the deck core's below: a test binary builds an app per test, and |
| 124 | // a compiled wasm module nobody releases is a leak per app. |
| 125 | if err := a.pdf.close(context.Background()); err != nil { |
| 126 | a.logger.Error("slides: close the pdf runtime", "err", err) |
| 127 | } |
| 128 | if a.core == nil { |
| 129 | return nil |
| 130 | } |
| 131 | return a.core.Close(context.Background()) |
| 132 | } |
| 133 | |
| 134 | // FlushMail waits until every sign-in link queued so far has been sent |
| 135 | // or dropped. The links go out after the response (mailqueue.go), so a |
| 136 | // test reads the mailer only after this. |
| 137 | func (a *app) FlushMail() { |
| 138 | if a.mail != nil { |
| 139 | a.mail.wait() |
| 140 | } |
| 141 | } |
| 142 | |
amadan