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299 | ;; ported-from: src/app/rooms.ts (the lobby half) — via app/rooms.cljs
;;
;; The lobby: pick one of the rooms this browser knows, rename one, forget one,
;; paste an invite link, or start a new room. It resolves with a room secret and
;; then gets out of the way; sueta.main awaits it.
;;
;; FIRST SCREEN ON REPLICANT (Phase 5a). What it replaces is worth naming,
;; because the shape below is the answer to it: a 146-line closure keyed off a
;; self-referential `volatile!` holding its own render function, which wiped
;; `overlay.innerHTML` on every interaction and then re-attached every listener
;; and re-appended the language picker — a third rendering strategy, distinct
;; from ui.cljs's two.
;;
;; THREE LAYERS, and the boundaries are the point:
;;
;; `init` / `step` the whole behaviour, pure. (state, event) -> [state',
;; effects]; effects are data. No DOM, no localStorage, no
;; timers, no clock.
;; `view` state -> hiccup, pure and TOTAL: everything it reads is
;; in the state it is handed. That is what makes
;; test/vectors/lobby-view.json a golden vector rather than
;; a screenshot — see `:now` below.
;; `lobby` the only impure part: it runs the effects, owns the
;; clock, and hands the render loop to sueta.app.view.
;;
;; `:now` IS IN THE STATE ON PURPOSE. "4 minutes ago" is a function of the
;; clock, and a view that calls `js/Date.now` itself cannot be pinned by a
;; fixture — the snapshot would change silently with the wall clock, which is
;; exactly the shape of gate this project has produced seven of. The clock is
;; read in ONE place (the dispatch, before `step`), which is no less accurate
;; than the code it replaces: that re-rendered only on interaction too.
;;
;; NO `esc`. Hiccup text becomes a DOM text node, so escaping is structural and
;; the copy of `esc` that used to live beside this code in app/rooms.cljs is
;; gone. Nothing here may assign `.-innerHTML` (test/source-hygiene.test.mjs).
(ns sueta.app.lobby
(:require [ardegazu.id.bridge-client :refer (IdBridge)]
[ardegazu.social.join :refer (home-chip)]
[sueta.app.rooms :as rooms]
[sueta.app.view :as view]
[sueta.config :as config]
[sueta.i18n :as i18n :refer (t)]
[ardegazu.rooms.js :as j]))
(def ^:private ARM-MS
"Two-tap forget: the first tap arms the button, a second within this window
deletes, and otherwise it disarms itself."
3500)
(def ^:private LINK-RE
"Anchored on purpose: the secret must be the whole input or a #fragment. An
unanchored 43-char run would \"join\" the middle of any pasted JWT or hash."
#"(?:#|^)([A-Za-z0-9_-]{43})(?=$|[&?\s])")
;; ---- the pure core ---------------------------------------------------------
(defn normalize
"The persisted room list — a JS array of {s, label, ts, lts?} — as the three
fields the view actually shows. The one boundary where the storage
representation stops mattering."
[js-rooms]
(mapv (fn [r] {:s (unchecked-get r "s")
:label (unchecked-get r "label")
:ts (unchecked-get r "ts")})
(array-seq js-rooms)))
(defn init [js-rooms now]
{:rooms (normalize js-rooms)
:renaming nil ; secret of the row being renamed
:armed nil ; secret of the armed forget button
:join-bad? false
:now now})
(defn- parse-secret [text]
(second (re-find LINK-RE (.trim ^string text))))
(defn step
"The lobby's entire behaviour. Pure."
[state [op a b]]
(case op
:open [state [[:resolve a]]]
:rename-start [(assoc state :renaming a) []]
:rename-cancel [(assoc state :renaming nil) []]
;; Guarded against the double commit: Enter commits, and the blur that
;; follows when the input is removed a frame later arrives as a SECOND
;; commit. Only the row still being renamed may commit — otherwise an
;; Escape would be undone by its own blur, and an Enter would bump `lts`
;; twice for one rename.
:rename-commit (if (not= a (:renaming state))
[state []]
(let [label (.trim ^string (if (some? b) b ""))]
[(assoc state :renaming nil)
(if (seq label)
[[:rename a label] [:reload]]
[])]))
:forget-tap (if (= a (:armed state))
[(assoc state :armed nil) [[:forget a] [:reload]]]
[(assoc state :armed a) [[:disarm-after ARM-MS a]]])
:disarm [(cond-> state (= a (:armed state)) (assoc :armed nil)) []]
;; PWA fix: invite links open the browser, not the installed app, so the
;; lobby accepts a pasted link (or a bare secret) and joins directly.
:join (if-some [secret (parse-secret (if (some? a) a ""))]
[(assoc state :join-bad? false) [[:touch secret] [:resolve secret]]]
[(assoc state :join-bad? true) [[:clear-join]]])
:create [state [[:create (.trim ^string (if (some? a) a ""))]]]
:rooms-loaded [(assoc state :rooms (normalize a)) []]
[state []]))
;; ---- the view --------------------------------------------------------------
(defn- fmt-ago [ts now]
(let [m (js/Math.round (/ (- now ts) 60000))]
(cond
(< m 1) (t "ago.now")
(< m 60) (t "ago.m" {"n" m})
(< m (* 60 24)) (t "ago.h" {"n" (js/Math.round (/ m 60))})
:else (t "ago.d" {"n" (js/Math.round (/ m 1440))}))))
(defn- rename-row [{:keys [s label]}]
[:div.room-row {:replicant/key s}
[:input.rename-in {:type "text"
:maxlength "40"
:value label
:enterkeyhint "done"
:on {:keydown [:rename-key s] :blur [:rename-blur s]}
;; the caret belongs to whoever is about to type in it.
;; DATA, not a closure: an inline `(fn …)` here prints as
;; `#object[Function]` in the snapshot, which is the exact
;; opacity replicant was chosen over reagent to avoid —
;; and it would have been the first thing in this repo to
;; put one back.
:replicant/on-mount [:focus-rename s]}]])
(defn- room-row [{:keys [s label ts]} armed now]
(let [armed? (= s armed)]
[:div.room-row {:replicant/key s}
[:button.room-open {:on {:click [:open s]}}
[:span.room-label label]
[:span.room-ago (fmt-ago ts now)]]
[:button.icon-btn.small {:title (t "lobby.rename.title")
:on {:click [:rename-start s]}}
"✎"]
[:button.icon-btn.small.forget {:class (when armed? "armed")
:title (t "lobby.forget.title")
:on {:click [:forget-tap s]}}
(if armed? (t "lobby.forget.arm") "🗑")]]))
(defn view
"state -> hiccup. Pure and total; pinned by test/vectors/lobby-view.json."
[{:keys [rooms renaming armed join-bad? now]}]
[:div.overlay.lobby
[:div.modal.lobby-box
[:h2 "sueta"]
[:p (t "lobby.sub1") [:br] (t "lobby.sub2")]
[:div.room-list
(if (empty? rooms)
[:p.hint (t "lobby.empty")]
(for [r rooms]
(if (= (:s r) renaming)
(rename-row r)
(room-row r armed now))))]
[:form#new-room-form.new-room-form {:on {:submit [:create]}}
[:input#new-room-name {:type "text"
:maxlength "40"
:placeholder (t "lobby.new.ph")
:enterkeyhint "go"
:autocomplete "off"}]
[:button#new-room.primary {:type "submit"} (t "lobby.new")]]
[:form#join-form.new-room-form {:on {:submit [:join]}}
[:input#join-link {:type "text"
:placeholder (if join-bad? (t "lobby.bad-link") (t "lobby.join.ph"))
:enterkeyhint "go"
:autocomplete "off"
:spellcheck "false"}]
[:button#join-room.primary.ghosty {:type "submit"} (t "lobby.join")]]
[:p.hint (t "lobby.hint")]
[:p.hint.ver (t "lobby.version" {"v" config/APP-VERSION})]
;; The language row is an imperatively built element with its own listeners
;; and its own subscription; replicant is given an empty slot and never
;; diffs its children, so the picker is built ONCE per lobby (the code this
;; replaces rebuilt it, and re-subscribed it, on every interaction).
[:div.lang-slot {:replicant/on-mount [:mount-lang-picker]}]]])
;; ---- the runtime -----------------------------------------------------------
(defn- pick-lang!
"Persist locally (set-lang, inside the picker), mirror to the suite identity
record best-effort, then reload into the new language."
[lang]
(-> (js/Promise.resolve nil)
(.then (fn [_]
(let [bridge (IdBridge. (j/ordered "ns" config/NS
"bridgeUrl" config/ID-BRIDGE-URL))]
(when (j/truthy? (.mirrorSeed ^js bridge))
(.putProfile ^js bridge (j/ordered "lang" lang))))))
(.catch (fn [_] nil))
(.then (fn [_] (.reload js/location))))
js/undefined)
(defn lobby
"Full-screen lobby; resolves with the chosen or newly created room secret."
[root make-secret]
(js/Promise.
(fn [resolve _reject]
(let [host (js/document.createElement "div")
state (atom (init (rooms/load-rooms) (js/Date.now)))
;; the mounted screen, or nil once it is over. nil BEFORE the first
;; paint too, which is what a mount hook firing mid-render sees —
;; and a render triggered from inside a render is exactly the
;; re-entrancy replicant defers with its own frame.
ui (volatile! nil)
fire! (volatile! nil)
render! (fn [] (when-some [u @ui] ((:schedule! u))) js/undefined)
value-of (fn [sel] (.-value ^js (.querySelector host sel)))
done (fn [secret]
;; the screen is over: nothing may paint into a detached host,
;; including an animation frame that is already queued (a
;; stray render re-runs the mount hooks and subscribes a
;; second language picker to on-lang-change)
(when-some [u @ui] ((:unmount! u)))
(vreset! ui nil)
(.remove (.-classList js/document.body) "soc-menu")
(.remove host)
(resolve secret)
js/undefined)
run! (fn run! [[fx a b]]
(case fx
:resolve (done a)
:touch (rooms/touch-room a)
:rename (rooms/rename-room a b)
:forget (rooms/forget-room a)
:reload (@fire! [:rooms-loaded (rooms/load-rooms)])
:disarm-after (js/setTimeout (fn [] (@fire! [:disarm b])) a)
;; DOM state, not markup: the input is uncontrolled (the
;; caret is the user's), so a rejected paste is cleared by
;; hand rather than by re-rendering a value over it
:clear-join (set! (.-value ^js (.querySelector host "#join-link")) "")
:create (let [secret (make-secret)]
(rooms/touch-room secret)
(when (seq a) (rooms/rename-room secret a))
(done secret)))
js/undefined)]
;; the lobby is a menu screen: show the kit's "back to the hub" chip
;; (renders nothing until body.soc-menu; idempotent across lobby visits)
(.add (.-classList js/document.body) "soc-menu")
(try (home-chip (j/ordered "t" i18n/t-kit)) (catch :default _ nil))
(vreset!
fire!
(fn fire! [event]
(when (some? event)
(let [[state' effects] (step (assoc @state :now (js/Date.now)) event)]
(reset! state state')
(doseq [effect effects] (run! effect))
(render!)))
js/undefined))
(.appendChild ^js root host)
(vreset!
ui
(view/mount!
host
(fn [] (view @state))
;; DOM events carry what only the DOM knows — which key, what the
;; user typed — and become plain events before `step` sees them.
;; The one data LIFE-CYCLE hook arrives here too, with a
;; :replicant/node and no :replicant/dom-event.
(fn [replicant-data handler-data]
(let [e (:replicant/dom-event replicant-data)]
(@fire! (case (first handler-data)
:join (do (.preventDefault ^js e) [:join (value-of "#join-link")])
:create (do (.preventDefault ^js e) [:create (value-of "#new-room-name")])
:rename-blur [:rename-commit (second handler-data)
(.-value (.-target ^js e))]
:rename-key (case (.-key ^js e)
"Enter" [:rename-commit (second handler-data)
(.-value (.-target ^js e))]
"Escape" [:rename-cancel]
nil)
;; the two data LIFE-CYCLE hooks: both act on the
;; node they are handed and produce no event
:focus-rename (let [node (:replicant/node replicant-data)]
(.focus ^js node)
(.select ^js node)
nil)
:mount-lang-picker
(do (.appendChild ^js (:replicant/node replicant-data)
(i18n/lang-picker-el {:on-pick pick-lang!}))
nil)
handler-data)))
js/undefined)))))))
|