| 1 | package docs |
| 2 | |
| 3 | import ( |
| 4 | "errors" |
| 5 | "net/http" |
| 6 | |
| 7 | "amadan.net/rastrillo/rastrillo" |
| 8 | ) |
| 9 | |
| 10 | // sharePage is the share screen's view data, resolved in the handler rather |
| 11 | // than in the template, as every other page here does it. |
| 12 | type sharePage struct { |
| 13 | Frame Frame |
| 14 | Title string |
| 15 | DocTitle string |
| 16 | Sqid string |
| 17 | Heading string |
| 18 | AddressLabel string |
| 19 | RoleLabel string |
| 20 | RoleReader string |
| 21 | RoleWriter string |
| 22 | ShareButton string |
| 23 | RevokeButton string |
| 24 | BackLabel string |
| 25 | EmptyBody string |
| 26 | Error string |
| 27 | Grants []shareRow |
| 28 | SignOutLabel string |
| 29 | |
| 30 | // The public link, the third rung of ruling 15. PublicURL is empty |
| 31 | // when the document is not published, and that emptiness is the |
| 32 | // switch's state — one field rather than a bool beside a string that |
| 33 | // could disagree with it. |
| 34 | PublicHeading string |
| 35 | PublicBody string |
| 36 | |
| 37 | // Published is whether a link exists; PublicURL is the link itself and |
| 38 | // is set only in the render immediately after publishing. |
| 39 | // |
| 40 | // Two fields rather than one because they are two different facts now: |
| 41 | // under ruling 16 the app knows a document is published without being |
| 42 | // able to say what its URL is. Collapsing them would make "published" |
| 43 | // unrepresentable whenever the URL is unavailable — which is almost |
| 44 | // always. |
| 45 | Published bool |
| 46 | PublicURL string |
| 47 | PublishButton string |
| 48 | UnpublishBtn string |
| 49 | ReplaceButton string |
| 50 | CopyHint string |
| 51 | OnceWarning string |
| 52 | PublishedBody string |
| 53 | |
| 54 | // The role picker's option cards (rastrillo's choice-field), the |
| 55 | // one-time link's accessible name, and the Copy button with the |
| 56 | // status it announces (fixtures/share-link.mjs). |
| 57 | RoleChoices []roleChoice |
| 58 | URLLabel string |
| 59 | CopyButton string |
| 60 | CopiedLabel string |
| 61 | ShareScript string |
| 62 | } |
| 63 | |
| 64 | // roleChoice is one option card: rastrillo's choice-field reads Value, |
| 65 | // Title, Desc and Checked. |
| 66 | type roleChoice struct { |
| 67 | Value, Title, Desc string |
| 68 | Checked bool |
| 69 | } |
| 70 | |
| 71 | // shareRow is one person who reaches this document. |
| 72 | type shareRow struct { |
| 73 | Address string |
| 74 | Role string |
| 75 | } |
| 76 | |
| 77 | // shareGet serves GET /d/{sqid}/share: who reaches this document, and the |
| 78 | // form that adds somebody. |
| 79 | // |
| 80 | // Owner-only, through Store.ListGrants, which goes through the owner-scoped |
| 81 | // Get. A grantee — even a writer — gets the 404 a stranger gets: re-sharing |
| 82 | // is not something a grant carries, and a document you may not share does not |
| 83 | // announce itself as one you may not share (spec §4.2). |
| 84 | func (h *handlers) shareGet(w http.ResponseWriter, r *http.Request) { |
| 85 | owner, err := h.owner(r) |
| 86 | if err != nil { |
| 87 | h.logger.Error("docs: resolve owner for share", "err", err) |
| 88 | h.fail(w, r, h.internalFailureStatus(), failStatus) |
| 89 | return |
| 90 | } |
| 91 | sqid := r.PathValue("sqid") |
| 92 | |
| 93 | doc, err := h.store.Get(r.Context(), owner, sqid) |
| 94 | if err != nil { |
| 95 | h.ownerLookupFailure(w, r, err) |
| 96 | return |
| 97 | } |
| 98 | grants, err := h.store.ListGrants(r.Context(), owner, sqid) |
| 99 | if err != nil { |
| 100 | h.logger.Error("docs: list grants", "sqid", sqid, "err", err) |
| 101 | h.fail(w, r, h.internalFailureStatus(), failStatus) |
| 102 | return |
| 103 | } |
| 104 | |
| 105 | h.renderShare(w, r, doc, grants, "", http.StatusOK) |
| 106 | } |
| 107 | |
| 108 | func (h *handlers) renderShare(w http.ResponseWriter, r *http.Request, doc *Document, grants []*Grant, errKey string, status int) { |
| 109 | // A failure to read the published state is logged and then rendered as |
| 110 | // "not published" rather than failing the page: the grant list above it |
| 111 | // is the part somebody came here for, and a 500 over the switch would |
| 112 | // take the working half of the screen down with it. |
| 113 | published, err := h.store.IsPublished(r.Context(), doc.OwnerID, doc.Sqid) |
| 114 | if err != nil { |
| 115 | h.logger.Error("docs: read published state", "sqid", doc.Sqid, "err", err) |
| 116 | if wantsNative(r) { |
| 117 | h.fail(w, r, http.StatusServiceUnavailable, failStatus) |
| 118 | return |
| 119 | } |
| 120 | if h.store.team != nil { |
| 121 | h.ownerLookupFailure(w, r, err) |
| 122 | return |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | // The URL appears only in the render that follows the publish that |
| 127 | // minted it (ruling 16: the database holds a hash and cannot produce a |
| 128 | // URL). Collected here, once; a reload shows the published state |
| 129 | // without it, exactly as a visit tomorrow would. |
| 130 | publicURL := h.oneShots.take(oneShotKey(doc.OwnerID, doc.Sqid)) |
| 131 | |
| 132 | if wantsNative(r) { |
| 133 | type grant struct { |
| 134 | Address string `json:"address"` |
| 135 | Role Role `json:"role"` |
| 136 | } |
| 137 | rows := make([]grant, 0, len(grants)) |
| 138 | for _, g := range grants { |
| 139 | rows = append(rows, grant{g.Subject, g.Role}) |
| 140 | } |
| 141 | nativeJSON(w, r, status, map[string]any{"sqid": doc.Sqid, "title": doc.Title, "grants": rows, "published": published, "public_url": publicURL, "error": errKey}) |
| 142 | return |
| 143 | } |
| 144 | rows := make([]shareRow, 0, len(grants)) |
| 145 | for _, g := range grants { |
| 146 | label := "docs.share.role.reader" |
| 147 | if g.Role == RoleWriter { |
| 148 | label = "docs.share.role.writer" |
| 149 | } |
| 150 | rows = append(rows, shareRow{Address: g.Subject, Role: rastrillo.T(r, label)}) |
| 151 | } |
| 152 | |
| 153 | page := sharePage{ |
| 154 | Title: rastrillo.T(r, "docs.share.title"), |
| 155 | DocTitle: doc.Title, |
| 156 | Sqid: doc.Sqid, |
| 157 | Heading: rastrillo.T(r, "docs.share.heading"), |
| 158 | AddressLabel: rastrillo.T(r, "docs.share.address"), |
| 159 | RoleLabel: rastrillo.T(r, "docs.share.role"), |
| 160 | RoleReader: rastrillo.T(r, "docs.share.role.reader"), |
| 161 | RoleWriter: rastrillo.T(r, "docs.share.role.writer"), |
| 162 | ShareButton: rastrillo.T(r, "docs.share.submit"), |
| 163 | RevokeButton: rastrillo.T(r, "docs.share.revoke"), |
| 164 | BackLabel: rastrillo.T(r, "docs.share.back"), |
| 165 | EmptyBody: rastrillo.T(r, "docs.share.empty"), |
| 166 | Grants: rows, |
| 167 | SignOutLabel: rastrillo.T(r, "docs.signout.label"), |
| 168 | |
| 169 | PublicHeading: rastrillo.T(r, "docs.share.public.heading"), |
| 170 | PublicBody: rastrillo.T(r, "docs.share.public.body"), |
| 171 | Published: published, |
| 172 | PublicURL: publicURL, |
| 173 | PublishButton: rastrillo.T(r, "docs.share.public.on"), |
| 174 | UnpublishBtn: rastrillo.T(r, "docs.share.public.off"), |
| 175 | ReplaceButton: rastrillo.T(r, "docs.share.public.replace"), |
| 176 | CopyHint: rastrillo.T(r, "docs.share.public.hint"), |
| 177 | OnceWarning: rastrillo.T(r, "docs.share.public.once"), |
| 178 | PublishedBody: rastrillo.T(r, "docs.share.public.published"), |
| 179 | |
| 180 | RoleChoices: []roleChoice{ |
| 181 | {Value: "reader", Title: rastrillo.T(r, "docs.share.role.reader"), Checked: true}, |
| 182 | {Value: "writer", Title: rastrillo.T(r, "docs.share.role.writer")}, |
| 183 | }, |
| 184 | URLLabel: rastrillo.T(r, "docs.share.public.url"), |
| 185 | CopyButton: rastrillo.T(r, "docs.share.public.copy"), |
| 186 | CopiedLabel: rastrillo.T(r, "docs.share.public.copied"), |
| 187 | ShareScript: shareScriptPath(), |
| 188 | } |
| 189 | if errKey != "" { |
| 190 | page.Error = rastrillo.T(r, errKey) |
| 191 | } |
| 192 | // "Share · {document} · Docs"; the bar names the document, read-only. |
| 193 | page.Frame = h.frame(r, frameOptions{titleParts: []string{page.Title, doc.Title}, context: doc.Title}) |
| 194 | |
| 195 | // no-store whenever this render carries the plaintext capability. |
| 196 | // "Shown once" was a server-side truth only: the browser's disk cache |
| 197 | // and bfcache would keep the URL, and any intermediary might, so on a |
| 198 | // shared machine the next person could page back to it. |
| 199 | // (Re-review, finding 5.) |
| 200 | if page.PublicURL != "" { |
| 201 | w.Header().Set("Cache-Control", "no-store") |
| 202 | } |
| 203 | if err := h.render.pageStatus(w, r, "share", page, status); err != nil { |
| 204 | h.logger.Error("docs: render share", "sqid", doc.Sqid, "err", err) |
| 205 | h.fail(w, r, h.internalFailureStatus(), failStatus) |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | // sharePost serves POST /d/{sqid}/share: grant an address access. |
| 210 | // |
| 211 | // Scriptless: a plain form with a named address field and a role radio, and a |
| 212 | // 303 back to this page afterwards so a reload does not re-post. |
| 213 | func (h *handlers) sharePost(w http.ResponseWriter, r *http.Request) { |
| 214 | // Member-only, on top of the owner check below: changing who reaches |
| 215 | // a document is a member power. A guest owns no documents (create is |
| 216 | // closed to them), so this is belt and braces — and it is the brace |
| 217 | // that holds if a guest ever acquires one. |
| 218 | if !h.requireMemberRequest(w, r, true) { |
| 219 | return |
| 220 | } |
| 221 | owner, err := h.owner(r) |
| 222 | if err != nil { |
| 223 | h.logger.Error("docs: resolve owner for share", "err", err) |
| 224 | h.fail(w, r, h.internalFailureStatus(), failStatus) |
| 225 | return |
| 226 | } |
| 227 | sqid := r.PathValue("sqid") |
| 228 | |
| 229 | doc, err := h.store.Get(r.Context(), owner, sqid) |
| 230 | if err != nil { |
| 231 | h.ownerLookupFailure(w, r, err) |
| 232 | return |
| 233 | } |
| 234 | |
| 235 | role := RoleReader |
| 236 | if r.PostFormValue("role") == string(RoleWriter) { |
| 237 | role = RoleWriter |
| 238 | } |
| 239 | |
| 240 | err = h.store.Grant(r.Context(), owner, sqid, r.PostFormValue("address"), role) |
| 241 | switch { |
| 242 | case err == nil: |
| 243 | if wantsNative(r) { |
| 244 | nativeJSON(w, r, 200, map[string]bool{"ok": true}) |
| 245 | return |
| 246 | } |
| 247 | http.Redirect(w, r, "/d/"+sqid+"/share", http.StatusSeeOther) |
| 248 | case errors.Is(err, errEmptyAddress): |
| 249 | // Re-render with the message rather than redirecting, so the person |
| 250 | // sees what was wrong beside the field they typed it into. |
| 251 | grants, listErr := h.store.ListGrants(r.Context(), owner, sqid) |
| 252 | if listErr != nil { |
| 253 | h.logger.Error("docs: list grants after refusal", "sqid", sqid, "err", listErr) |
| 254 | h.fail(w, r, h.internalFailureStatus(), failStatus) |
| 255 | return |
| 256 | } |
| 257 | h.renderShare(w, r, doc, grants, "docs.share.error.address", http.StatusBadRequest) |
| 258 | default: |
| 259 | h.logger.Error("docs: grant", "sqid", sqid, "err", err) |
| 260 | h.fail(w, r, h.internalFailureStatus(), failStatus) |
| 261 | } |
| 262 | } |
| 263 | |
| 264 | // shareRevoke serves POST /d/{sqid}/share/revoke. |
| 265 | func (h *handlers) shareRevoke(w http.ResponseWriter, r *http.Request) { |
| 266 | // Member-only, on top of the owner check below: changing who reaches |
| 267 | // a document is a member power. A guest owns no documents (create is |
| 268 | // closed to them), so this is belt and braces — and it is the brace |
| 269 | // that holds if a guest ever acquires one. |
| 270 | if !h.requireMemberRequest(w, r, true) { |
| 271 | return |
| 272 | } |
| 273 | owner, err := h.owner(r) |
| 274 | if err != nil { |
| 275 | h.logger.Error("docs: resolve owner for revoke", "err", err) |
| 276 | h.fail(w, r, h.internalFailureStatus(), failStatus) |
| 277 | return |
| 278 | } |
| 279 | sqid := r.PathValue("sqid") |
| 280 | |
| 281 | if _, err := h.store.Get(r.Context(), owner, sqid); err != nil { |
| 282 | h.ownerLookupFailure(w, r, err) |
| 283 | return |
| 284 | } |
| 285 | if err := h.store.Revoke(r.Context(), owner, sqid, r.PostFormValue("address")); err != nil { |
| 286 | h.logger.Error("docs: revoke", "sqid", sqid, "err", err) |
| 287 | h.fail(w, r, h.internalFailureStatus(), failStatus) |
| 288 | return |
| 289 | } |
| 290 | if wantsNative(r) { |
| 291 | nativeJSON(w, r, 200, map[string]bool{"ok": true}) |
| 292 | return |
| 293 | } |
| 294 | http.Redirect(w, r, "/d/"+sqid+"/share", http.StatusSeeOther) |
| 295 | } |
| 296 | |
| 297 | func (h *handlers) ownerLookupFailure(w http.ResponseWriter, r *http.Request, err error) { |
| 298 | if h.store.team != nil && errors.Is(err, errTeamUnavailable) { |
| 299 | h.fail(w, r, http.StatusServiceUnavailable, failStatus) |
| 300 | return |
| 301 | } |
| 302 | h.fail(w, r, http.StatusNotFound, failDocument) |
| 303 | } |
| 304 | |
amadan