""" Applet: SUB/WAVE Now Playing Summary: Shows what's playing on a SUB/WAVE station Description: Configure with your SUB/WAVE (github.com/perminder-klair/subwave) station's base URL to display the current track, artist, show, host, album art, time/temp, and a progress bar. Author: poprhythm """ load("render.star", "render") load("schema.star", "schema") load("http.star", "http") load("cache.star", "cache") load("time.star", "time") DEFAULT_STATION_URL = "" NOWPLAYING_TTL = 20 COVER_TTL = 300 COLOR_TITLE = "#22d3ee" # cyan COLOR_ARTIST = "#22d3ee" # cyan COLOR_SEPARATOR = "#444444" # thin divider between artist and show/host COLOR_SHOW = "#e0e0e0" # near-white COLOR_HOST = "#ec4899" # magenta/pink COLOR_META = "#888888" # muted gray, for the time/temp footer COLOR_BAR_FILLED = "#c026d3" # magenta/purple COLOR_BAR_EMPTY = "#333333" def main(config): station_url = config.get("station_url", DEFAULT_STATION_URL) if station_url: station_url = station_url.rstrip("/") if not station_url: return render.Root(child = _message_screen(["Set station URL", "in app settings"])) now = _fetch_now_playing(station_url) if now == None: return render.Root(child = _message_screen(["Can't reach", "station"])) if not now["online"]: return render.Root(child = _message_screen([now["station"], "offline"])) art = _fetch_cover(station_url, now["subsonic_id"]) progress = _track_progress(now["subsonic_id"], now["duration"]) top_lines = [ render.Marquee(width = 32, child = render.Text(now["title"], color = COLOR_TITLE)), render.Marquee(width = 32, child = render.Text(now["artist"], color = COLOR_ARTIST)), ] # Note: show/host is plain Text/Row, not Marquee. Pixlet's Marquee runs # its own internal scroll-cycle animation regardless of whether the text # actually needs to scroll, and combining multiple Marquees with very # different cycle lengths in one Root desyncs them -- confirmed via an # isolated repro where a short Marquee'd line intermittently collapsed to # a single character on frames where the long title/artist marquees were # mid-cycle. Plain Text just clips if too wide, an acceptable tradeoff # for this short field. if now["show"]: top_lines.append(render.Box(width = 32, height = 1, color = COLOR_SEPARATOR)) show_host_row = [render.Text(now["show"], font = "tom-thumb", color = COLOR_SHOW)] if now["host"]: show_host_row.append(render.Text(" " + now["host"], font = "tom-thumb", color = COLOR_HOST)) top_lines.append(render.Row(children = show_host_row)) text_column = render.Column(children = top_lines) if art: base = render.Row(children = [render.Image(src = art, width = 32, height = 32), text_column]) else: base = render.Column( main_align = "center", cross_align = "center", expanded = True, children = [ render.Marquee(width = 64, child = render.Text(now["title"], color = COLOR_TITLE)), render.Marquee(width = 64, child = render.Text(now["artist"], color = COLOR_ARTIST)), ], ) # Time/temp and the progress bar are rendered as a full-width (64px) # footer overlaid on top of the base layout via Stack, rather than # squeezed into the 32px-wide text column -- gives roughly 2x the # character budget for the time/temp line, at the cost of covering the # bottom ~9px of the album art with a translucent bar. footer_children = [] if now["time_temp"]: footer_children.append( render.Box( width = 64, height = 7, color = "#000000cc", child = render.Row( expanded = True, main_align = "center", cross_align = "center", children = [render.Text(now["time_temp"], font = "tom-thumb", color = COLOR_META)], ), ), ) if progress != None: footer_children.append(_progress_bar(progress["fraction"], width = 64)) if not footer_children: return render.Root(child = base) footer = render.Box( width = 64, height = 32, child = render.Column( main_align = "end", cross_align = "start", expanded = True, children = [render.Column(children = footer_children)], ), ) return render.Root(child = render.Stack(children = [base, footer])) def _message_screen(lines): return render.Column( main_align = "center", cross_align = "center", expanded = True, children = [render.Text(line, font = "tom-thumb") for line in lines], ) def _progress_bar(fraction, width = 32, height = 2): filled = int(width * fraction + 0.5) filled = max(0, min(filled, width)) children = [] if filled > 0: children.append(render.Box(width = filled, height = height, color = COLOR_BAR_FILLED)) if filled < width: children.append(render.Box(width = width - filled, height = height, color = COLOR_BAR_EMPTY)) return render.Row(children = children) def _fetch_now_playing(station_url): rep = http.get(station_url + "/api/now-playing", ttl_seconds = NOWPLAYING_TTL) if rep.status_code != 200: return None data = rep.json() np = data.get("nowPlaying", {}) dj = data.get("dj", {}) context = data.get("context", {}) active_show = context.get("activeShow", {}) return { "title": np.get("title", "Unknown title"), "artist": np.get("artist", "Unknown artist"), "subsonic_id": np.get("subsonic_id", ""), "duration": np.get("duration", 0), "station": dj.get("station", "SUB/WAVE"), "show": active_show.get("name", ""), "host": dj.get("name", ""), "time_temp": _format_time_temp(context.get("clock", {}), context.get("weather", {})), "online": bool(data.get("streamOnline", False)), } def _format_time_temp(clock, weather): parts = [] display_time = clock.get("display", "") if display_time: parts.append(display_time) temp = weather.get("temp", None) unit = weather.get("tempUnit", "") if temp != None: parts.append("%d°%s" % (int(temp), unit)) return " · ".join(parts) def _fetch_cover(station_url, subsonic_id): if not subsonic_id: return None rep = http.get(station_url + "/api/cover/" + subsonic_id, ttl_seconds = COVER_TTL) if rep.status_code != 200: return None return rep.body() # The now-playing API reports track duration but not elapsed/remaining time, # so we track playback position ourselves: the first time we see a given # subsonic_id, we stamp the current wall-clock time in the cache; on later # renders (while the cache entry is still alive) we diff against that stamp # to get elapsed seconds. This only works on a long-lived server process # with a persistent cache (confirmed true for tronbyt/server's in-memory # cache) -- a one-shot `pixlet render` CLI call always starts a fresh # process with an empty cache, so progress will always show 0% locally. def _track_progress(subsonic_id, duration): if not subsonic_id or not duration: return None key = "subwave_track_start_" + subsonic_id now_unix = time.now().unix cached = cache.get(key) if cached == None: cache.set(key, str(now_unix), ttl_seconds = int(duration) + 30) start_unix = now_unix else: start_unix = int(cached) elapsed = max(0, now_unix - start_unix) remaining = max(0, duration - elapsed) fraction = min(1.0, float(elapsed) / float(duration)) return {"elapsed": elapsed, "remaining": remaining, "fraction": fraction} def get_schema(): return schema.Schema( version = "1", fields = [ schema.Text( id = "station_url", name = "Station URL", desc = "Base URL of your SUB/WAVE station, e.g. https://radio.example.com", icon = "server", default = DEFAULT_STATION_URL, ), ], )