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package web |
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import ( |
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"context" |
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"errors" |
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"net/http" |
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"github.com/go-chi/chi/v5" |
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"sourcecraft.dev/bigbes/sr-ht-ecore/chrome" |
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"sourcecraft.dev/bigbes/sr-ht-dolt/browse" |
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"sourcecraft.dev/bigbes/sr-ht-dolt/core" |
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) |
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// handleView renders a specialized alternative view of a repository. The view |
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// is selected by the {view} URL slug and must both exist in a.views and Apply |
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// to the tables at the resolved ref; otherwise the request is a 404 (the view |
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// simply does not exist for this repo). The generic table browser remains |
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// reachable via the tree/table routes regardless. |
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// |
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// The ref is taken from ?ref= (default: the repo's default branch). The view's |
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// own Template() is rendered with a fixed envelope: the chrome, the repo, the |
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// ref and branch list, the applicable view tabs, and the opaque value the view |
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// produced from Build (as .Data). |
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func (a *app) handleView(w http.ResponseWriter, r *http.Request) { |
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repo, _, _, ok := a.loadRepoForBrowse(w, r) |
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if !ok { |
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return |
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} |
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sess, ok := a.openBrowse(w, r, repo) |
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if !ok { |
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return |
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} |
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defer sess.Close() |
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ref := r.URL.Query().Get("ref") |
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if ref == "" { |
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branches, err := sess.Branches(r.Context()) |
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if err != nil { |
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http.Error(w, "failed to list branches", http.StatusInternalServerError) |
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return |
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} |
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ref = browse.DefaultBranch(branches) |
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} |
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tables, err := sess.Tables(r.Context(), ref) |
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if err != nil { |
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if errors.Is(err, browse.ErrRefNotFound) { |
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a.notFound(w, r) |
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return |
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} |
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http.Error(w, "failed to read tables", http.StatusInternalServerError) |
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return |
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} |
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// Find the requested view; an unknown slug or a view that does not fingerprint |
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// these tables is reported as not found — the view does not exist here. |
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slug := chi.URLParam(r, "view") |
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var view View |
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for _, v := range a.views { |
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if v.Name() == slug { |
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view = v |
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break |
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} |
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} |
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if view == nil || !view.Applies(tables) { |
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a.notFound(w, r) |
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return |
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} |
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data, err := view.Build(r.Context(), sess, repo, ref, r.URL.Query()) |
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if err != nil { |
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http.Error(w, "failed to build view", http.StatusInternalServerError) |
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return |
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} |
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// Re-list branches for the chrome/tab bar. Cheap and keeps the ref selector |
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// consistent whether or not ?ref= was supplied. |
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branches, _ := sess.Branches(r.Context()) |
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envelope := struct { |
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chrome.Page |
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Repo *core.Repo |
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Ref string |
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Branches []browse.Branch |
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Views []View |
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Head *browse.CommitInfo |
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Data any |
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// Links renders the issue ids inside stored prose as links to the database |
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// that owns them. It is built by the one rendering that needs it — the |
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// beads detail pane — and is nil for every other page here, because |
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// building it opens a store per database the caller may browse. A nil one |
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// still renders text; see beadLinks.Text. |
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Links *beadLinks |
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// Memories renders a memory's stored markdown, with its [[slug]] |
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// references and the issue ids in its prose linked to the databases that |
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// hold them. It is built by the memory view alone, for the reason Links is |
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// built by the detail pane alone: it opens a store per database this |
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// caller may browse. A nil one still renders the markdown, with every |
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// reference left as text; see memoryLinks.Body. |
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Memories *memoryLinks |
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}{ |
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Page: a.page(r, view.Label()+" — "+repo.OwnerName+"/"+repo.Name), |
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Repo: repo, |
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Ref: ref, |
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Branches: branches, |
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Views: applicableViews(a.views, tables), |
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Head: headCommit(r.Context(), sess, ref), |
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Data: data, |
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Links: a.beadCrossLinks(r, view, repo, data), |
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Memories: a.memoryCrossLinks(r, view, repo), |
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} |
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a.render(w, http.StatusOK, pageName(view.Template()), envelope) |
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} |
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// headCommit reads the head commit of ref for the envelope's freshness line: a |
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// board rendered from a store that stopped receiving pushes yesterday is |
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// otherwise indistinguishable from a current one. |
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// |
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// It returns nil rather than an error, and that is the whole contract. A |
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// database with no commits, or a Log that fails, must still render the view — |
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// this is decoration on top of an answer, and it may never be the reason a |
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// reader gets a 500 instead of a board. The partial renders nothing for nil. |
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func headCommit(ctx context.Context, sess BrowseSession, ref string) *browse.CommitInfo { |
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commits, _, err := sess.Log(ctx, ref, "", 1) |
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if err != nil || len(commits) == 0 { |
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return nil |
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} |
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return &commits[0] |
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} |