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package web |
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import ( |
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"context" |
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"fmt" |
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"log/slog" |
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"net/http" |
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"go.bigb.es/auxilia/scribe" |
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"sourcecraft.dev/bigbes/sr-ht-ecore/chrome" |
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"sourcecraft.dev/bigbes/sr-ht-dolt/beads" |
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"sourcecraft.dev/bigbes/sr-ht-dolt/core" |
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) |
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// handleReady renders the cross-database ready page: for every database this |
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// caller may browse, the issues that are open, unblocked and not scaffolding, |
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// grouped by database. |
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// |
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// It is the one page here that reads more than one database, and the three |
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// things that keeps affordable live in beads: the head-hash gate over the app's |
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// projection cache, the 60-second TTL, and the ceiling on how many databases one |
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// request opens. This handler's own job is the other half — deciding which |
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// databases the caller may see at all, and doing it before a single store is |
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// opened. |
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// |
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// Visibility is enumerated with ListReposForViewer (the listing rule) and then |
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// re-asked per database with core.Allowed/OpBrowse (the access rule). A database |
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// the caller may not browse is simply absent: not a 403, not a count, not a |
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// group with a hidden name — nothing on the page may hint that it exists. |
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func (a *app) handleReady(w http.ResponseWriter, r *http.Request) { |
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_, caller := callerOf(r.Context()) |
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repos, err := a.cfg.Repos.ListReposForViewer(r.Context(), caller) |
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if err != nil { |
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slog.Error("listing databases for the ready page failed", |
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"component", "web", scribe.Err(err)) |
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a.fail(w, r, http.StatusInternalServerError, "") |
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return |
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} |
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// The disk path never reaches beads: it is this service's arrangement of its |
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// own storage, and the aggregation addresses a database by the identity the |
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// cache is keyed on. The opener closes over the map, so a database that was |
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// filtered out of the candidate list has no path to be opened by. |
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paths := make(map[int]string, len(repos)) |
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dbs := make([]beads.ReadyDatabase, 0, len(repos)) |
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for _, repo := range repos { |
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if !core.Allowed(caller, repo, a.effectiveACL(r, caller, repo), core.OpBrowse) { |
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continue |
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} |
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paths[repo.ID] = repo.Path |
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dbs = append(dbs, beads.ReadyDatabase{ |
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ID: repo.ID, |
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OwnerName: repo.OwnerName, |
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Name: repo.Name, |
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}) |
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} |
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open := func(ctx context.Context, d beads.ReadyDatabase) (beads.ReadySession, error) { |
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path, ok := paths[d.ID] |
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if !ok { |
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return nil, fmt.Errorf("web: no store path for database %s", d.Slug()) |
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} |
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return a.cfg.Browse.Open(ctx, path) |
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} |
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data := beads.ReadyAcross(r.Context(), dbs, open, a.ready, |
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beads.ParseReadyFilter(r.URL.Query()), timeNow()) |
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data.Query = r.URL.Query() |
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// A store that cannot be read is a fact about this deployment, and it belongs |
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// in the log with its error. The page says only how many databases it could |
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// not read: echoing a browse error into the response is how a store path and |
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// a dolt internal end up in somebody's browser (sr-ht-dolt-7ta). |
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for _, f := range data.Failed { |
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slog.Warn("reading a database for the ready page failed", |
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"component", "web", "database", f.Database.Slug(), scribe.Err(f.Err)) |
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} |
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view := struct { |
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chrome.Page |
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Data *beads.ReadyView |
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}{ |
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Page: a.page(r, "Ready — "+serviceName), |
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Data: data, |
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} |
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a.render(w, http.StatusOK, "ready", view) |
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} |