| 1 | package home |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "errors" |
| 6 | "io" |
| 7 | "mime" |
| 8 | "net/http" |
| 9 | "net/url" |
| 10 | |
| 11 | "amadan.net/oficina/home/handoff" |
| 12 | "amadan.net/oficina/home/internal/home/directorydata" |
| 13 | "amadan.net/rastrillo/rastrillo/csrf" |
| 14 | "amadan.net/rastrillo/rastrillo/sessions" |
| 15 | ) |
| 16 | |
| 17 | const docsEntryPath = "/apps/docs" |
| 18 | const docsChoicePath = "/apps/docs/team" |
| 19 | |
| 20 | type docsChoices interface { |
| 21 | Choices(context.Context, string, string) ([]directorydata.Choice, error) |
| 22 | } |
| 23 | |
| 24 | type docsChooser struct { |
| 25 | app *App |
| 26 | store docsChoices |
| 27 | appID, appName, entryPath, choicePath string |
| 28 | selectHandler http.Handler |
| 29 | } |
| 30 | |
| 31 | // newDocsChooser prepares handlers without mounting routes or applying schema. |
| 32 | // The parent directory router must supply its existing sessions middleware and |
| 33 | // exact-host guard. Selection carries its own same-origin CSRF protection. |
| 34 | func (a *App) newDocsChooser(store docsChoices) (*docsChooser, error) { |
| 35 | return a.newAppChooser(store, "docs") |
| 36 | } |
| 37 | |
| 38 | func (a *App) newAppChooser(store docsChoices, appID string) (*docsChooser, error) { |
| 39 | name := "" |
| 40 | for _, app := range directoryApps() { |
| 41 | if app.slug == appID && app.integrated { |
| 42 | name = app.name |
| 43 | } |
| 44 | } |
| 45 | if name == "" { |
| 46 | return nil, errExchangeConfig |
| 47 | } |
| 48 | |
| 49 | if a == nil || a.runtime == nil || a.runtime.role != "directory" || a.renderer == nil || a.origins.validate() != nil || store == nil { |
| 50 | return nil, errors.New("invalid Docs chooser configuration") |
| 51 | } |
| 52 | c := &docsChooser{app: a, store: store, appID: appID, appName: name, entryPath: "/apps/" + appID, choicePath: "/apps/" + appID + "/team"} |
| 53 | c.selectHandler = csrf.Protect(a.origins.Directory)(http.HandlerFunc(c.choose)) |
| 54 | return c, nil |
| 55 | } |
| 56 | func (c *docsChooser) Entry(w http.ResponseWriter, r *http.Request) { |
| 57 | w.Header().Set("Cache-Control", "no-store") |
| 58 | if r.Method != http.MethodGet { |
| 59 | w.Header().Set("Allow", http.MethodGet) |
| 60 | w.WriteHeader(http.StatusMethodNotAllowed) |
| 61 | return |
| 62 | } |
| 63 | if r.URL.Path != c.entryPath || r.URL.RawQuery != "" || r.URL.ForceQuery { |
| 64 | http.NotFound(w, r) |
| 65 | return |
| 66 | } |
| 67 | // A preview deployment replaces the team routes for this app, as it |
| 68 | // does on the catalog page, so the entry follows it too (spec |
| 69 | // shared-chrome §6.2(b)): otherwise a link here from an app's switcher |
| 70 | // ends on "No teams available". A preview is an operator choice, not a |
| 71 | // team, so it needs no directory session; it goes to the preview's |
| 72 | // root, like the single-team redirect below. |
| 73 | if preview := c.previewOrigin(); preview != "" { |
| 74 | http.Redirect(w, r, preview+"/", http.StatusSeeOther) |
| 75 | return |
| 76 | } |
| 77 | subject, ok := c.subject(w, r) |
| 78 | if !ok { |
| 79 | return |
| 80 | } |
| 81 | choices, err := c.store.Choices(r.Context(), subject, c.appID) |
| 82 | if err != nil { |
| 83 | c.unavailable(w, r) |
| 84 | return |
| 85 | } |
| 86 | switch len(choices) { |
| 87 | case 0: |
| 88 | c.app.render(w, r, http.StatusOK, "docs_empty.html", map[string]any{"AppName": c.appName}) |
| 89 | case 1: |
| 90 | c.redirect(w, r, choices[0]) |
| 91 | default: |
| 92 | c.app.render(w, r, http.StatusOK, "docs_chooser.html", map[string]any{"Choices": choices, "AppName": c.appName, "ChoicePath": c.choicePath}) |
| 93 | } |
| 94 | } |
| 95 | func (c *docsChooser) Select(w http.ResponseWriter, r *http.Request) { |
| 96 | w.Header().Set("Cache-Control", "no-store") |
| 97 | if r.Method != http.MethodPost { |
| 98 | w.Header().Set("Allow", http.MethodPost) |
| 99 | w.WriteHeader(http.StatusMethodNotAllowed) |
| 100 | return |
| 101 | } |
| 102 | if r.URL.Path != c.choicePath || r.URL.RawQuery != "" || r.URL.ForceQuery { |
| 103 | http.NotFound(w, r) |
| 104 | return |
| 105 | } |
| 106 | c.selectHandler.ServeHTTP(w, r) |
| 107 | } |
| 108 | func (c *docsChooser) choose(w http.ResponseWriter, r *http.Request) { |
| 109 | subject, ok := c.subject(w, r) |
| 110 | if !ok { |
| 111 | return |
| 112 | } |
| 113 | media, _, err := mime.ParseMediaType(r.Header.Get("Content-Type")) |
| 114 | if err != nil || media != "application/x-www-form-urlencoded" { |
| 115 | http.NotFound(w, r) |
| 116 | return |
| 117 | } |
| 118 | body, err := io.ReadAll(http.MaxBytesReader(w, r.Body, 1024)) |
| 119 | if err != nil { |
| 120 | http.NotFound(w, r) |
| 121 | return |
| 122 | } |
| 123 | form, err := url.ParseQuery(string(body)) |
| 124 | if err != nil || len(form) != 1 || len(form["team"]) != 1 || form.Get("team") == "" { |
| 125 | http.NotFound(w, r) |
| 126 | return |
| 127 | } |
| 128 | choices, err := c.store.Choices(r.Context(), subject, c.appID) |
| 129 | if err != nil { |
| 130 | c.unavailable(w, r) |
| 131 | return |
| 132 | } |
| 133 | for _, choice := range choices { |
| 134 | if choice.SQID == form.Get("team") { |
| 135 | c.continueToDocs(w, r, choice) |
| 136 | return |
| 137 | } |
| 138 | } |
| 139 | http.NotFound(w, r) |
| 140 | } |
| 141 | func (c *docsChooser) subject(w http.ResponseWriter, r *http.Request) (string, bool) { |
| 142 | session, ok := sessions.Current(r) |
| 143 | if !ok { |
| 144 | target := handoff.StartPath + "?" + url.Values{"return_to": {c.entryPath}}.Encode() |
| 145 | if r.Method == http.MethodPost { |
| 146 | // Start a new GET navigation after the form response. The submitted |
| 147 | // selection is discarded; sign-in returns to current team choices. |
| 148 | c.renderContinuation(w, r, c.app.origins.Directory+target) |
| 149 | } else { |
| 150 | http.Redirect(w, r, target, http.StatusSeeOther) |
| 151 | } |
| 152 | return "", false |
| 153 | } |
| 154 | if !ValidPersonRef(session.Subject) { |
| 155 | http.NotFound(w, r) |
| 156 | return "", false |
| 157 | } |
| 158 | return session.Subject, true |
| 159 | } |
| 160 | func (c *docsChooser) unavailable(w http.ResponseWriter, r *http.Request) { |
| 161 | c.app.render(w, r, http.StatusServiceUnavailable, "docs_unavailable.html", nil) |
| 162 | } |
| 163 | |
| 164 | // previewOrigin is the operator's preview deployment for this app, or "". |
| 165 | // Both settings were validated at construction (validAppPreviews). |
| 166 | func (c *docsChooser) previewOrigin() string { |
| 167 | if c.appID == "docs" && c.app.runtime.docsPreviewOrigin != "" { |
| 168 | return c.app.runtime.docsPreviewOrigin |
| 169 | } |
| 170 | return c.app.runtime.appPreviewOrigins[c.appID] |
| 171 | } |
| 172 | |
| 173 | // redirect and continueToDocs send the browser to the chosen team's app |
| 174 | // root, not to its /auth/start. The app's own guard starts an assertion |
| 175 | // exchange only when it has no session of its own, so a switch into an |
| 176 | // app you are already signed in to costs no exchange and no interstitial |
| 177 | // (spec shared-chrome §6.2(a)). |
| 178 | func (c *docsChooser) redirect(w http.ResponseWriter, r *http.Request, choice directorydata.Choice) { |
| 179 | // The directorydata store has already applied the configured destination |
| 180 | // policy. Generic entry carries only the app root, never a document path. |
| 181 | http.Redirect(w, r, choice.Origin+"/", http.StatusSeeOther) |
| 182 | } |
| 183 | |
| 184 | func (c *docsChooser) continueToDocs(w http.ResponseWriter, r *http.Request, choice directorydata.Choice) { |
| 185 | if !directorydata.ValidOrigin(choice.Origin) { |
| 186 | c.unavailable(w, r) |
| 187 | return |
| 188 | } |
| 189 | c.renderContinuation(w, r, choice.Origin+"/") |
| 190 | } |
| 191 | |
| 192 | // Callers supply either a validated stored app origin plus the app root, |
| 193 | // or the validated directory origin plus the fixed sign-in continuation path. |
| 194 | func (c *docsChooser) renderContinuation(w http.ResponseWriter, r *http.Request, destination string) { |
| 195 | c.app.renderContinuation(w, r, destination, "Continue to "+c.appName) |
| 196 | } |
| 197 | |
amadan