490 lines
15 KiB
Luau
490 lines
15 KiB
Luau
--!nonstrict
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-- Lyrics — headless service.
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-- Polls MPRIS metadata via playerctl, fetches lyrics from NetEase Cloud Music
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-- via /api endpoints, publishes state. No polling delay.
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noctalia.setUpdateInterval(250)
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local cache = {}
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local coverCache = {}
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local lastTrackKey = ""
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local inFlight = nil
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local coverInFlight = nil
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local krcTmp = (noctalia.pluginDir() or "/tmp") .. "/.krc_cache.tmp"
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local lyricsSource = noctalia.getConfig("lyrics_source") or "auto"
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local customUrl = noctalia.getConfig("custom_url") or ""
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local customJsonField = noctalia.getConfig("custom_json_field") or "syncedLyrics"
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local currentTrack = nil
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local currentEmbeddedLyrics = ""
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local function coverPathFor(track)
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local safe = (track.artist .. "_" .. track.album .. "_" .. track.title):gsub("[^%w]+", "_")
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return noctalia.pluginDir() .. "/cover_" .. safe .. ".jpg"
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end
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local function shellQuote(value)
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return "'" .. tostring(value):gsub("'", "'\\''") .. "'"
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end
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local function parseLRC(lrcText)
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local lines = {}
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for line in lrcText:gmatch("[^\n]+") do
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local mins, secs = line:match("%[(%d+):(%d+%.?%d*)%]")
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if mins and secs then
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local ms = math.floor(tonumber(mins) * 60000 + tonumber(secs) * 1000)
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local text = line:gsub("%[%d+:%d+%.?%d*%]", ""):gsub("^%s+", ""):gsub("%s+$", "")
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if text ~= "" then
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local isMeta = ms < 5000 and (text:find(":") or text:find("："))
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if not isMeta then
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lines[#lines + 1] = { time = ms, text = text }
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end
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end
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end
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end
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if #lines == 0 then return nil end
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return lines
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end
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local function parsePlain(text)
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local lines = {}
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local seenLyric = false
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for line in text:gmatch("[^\n]+") do
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local trimmed = line:gsub("^%s+", ""):gsub("%s+$", "")
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if trimmed ~= "" then
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if seenLyric then
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lines[#lines + 1] = { time = -1, text = trimmed }
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elseif trimmed:find(":") or trimmed:find("：") then
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-- skip metadata header line
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else
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seenLyric = true
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lines[#lines + 1] = { time = -1, text = trimmed }
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end
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end
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end
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if #lines == 0 then return nil end
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return lines
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end
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local function evictCache()
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local keys = {}
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for k, _ in pairs(cache) do keys[#keys + 1] = k end
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if #keys > 30 then
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table.sort(keys)
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for i = 1, #keys - 30 do cache[keys[i]] = nil end
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end
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end
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local function fetchLyricsNetEase(track, embeddedLyrics)
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if inFlight then return end
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inFlight = track
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local tk = track.title .. "|" .. track.artist .. "|" .. track.album
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local function tryFetch(query, fallback)
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local searchUrl = "https://music.163.com/api/search/get?type=1&s=" .. noctalia.string.urlEncode(query) .. "&limit=5"
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noctalia.http({ url = searchUrl, headers = { "Referer: https://music.163.com" } }, function(r1)
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if not inFlight then return end
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if tk ~= lastTrackKey then inFlight = nil; return end
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if not r1.ok or r1.status < 200 or r1.status >= 300 or not r1.body or #r1.body == 0 then
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if fallback then fallback()
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else inFlight = nil; noctalia.state.set("lyrics", nil) end
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return
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end
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local data = noctalia.json.decode(r1.body)
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if not data or not data.result or not data.result.songs or #data.result.songs == 0 then
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if fallback then fallback()
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else inFlight = nil; noctalia.state.set("lyrics", nil) end
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return
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end
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local function songArtist(s)
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if s.artists and #s.artists > 0 then
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return (s.artists[1].name or ""):lower()
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end
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return ""
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end
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local bestMatch = nil
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local trackArtist = track.artist:lower()
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for _, s in ipairs(data.result.songs) do
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if songArtist(s):find(trackArtist, 1, true) then
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bestMatch = s
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break
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end
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end
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if not bestMatch then
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bestMatch = data.result.songs[1]
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end
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local songId = tostring(bestMatch.id or "")
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if not songId:match("^%d+$") then
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if fallback then fallback()
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else inFlight = nil; noctalia.state.set("lyrics", nil) end
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return
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end
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local lyricUrl = "https://music.163.com/api/song/lyric?id=" .. noctalia.string.urlEncode(songId) .. "&lv=1&kv=1&tv=-1"
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noctalia.http({ url = lyricUrl, headers = { "Referer: https://music.163.com" } }, function(r2)
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if not inFlight then return end
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if tk ~= lastTrackKey then inFlight = nil; return end
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local lyrics = nil
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if r2.ok and r2.status >= 200 and r2.status < 300 and r2.body and #r2.body > 0 then
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local ldata = noctalia.json.decode(r2.body)
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local klyricStr = ""
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if ldata and ldata.klyric then
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local k = ldata.klyric
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if type(k) == "string" then
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klyricStr = k
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elseif type(k) == "table" then
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klyricStr = (k.lyric and type(k.lyric) == "string") and k.lyric or ""
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end
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end
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if klyricStr ~= "" then
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local ok = pcall(noctalia.writeFile, krcTmp, klyricStr)
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if not ok then klyricStr = "" end
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end
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if klyricStr ~= "" then
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local py = 'python3 "' .. noctalia.pluginDir() .. '/krc_decode.py" "' .. krcTmp .. '"'
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noctalia.runAsync(py, function(r3)
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if not inFlight then return end
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if tk ~= lastTrackKey then inFlight = nil; return end
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local ok, parsed = pcall(noctalia.json.decode, r3.stdout or "")
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if ok and parsed and parsed.type == "krc" and parsed.lines then
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cache[tk] = parsed.lines
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evictCache()
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inFlight = nil
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noctalia.state.set("lyrics", parsed.lines)
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return
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end
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local lrc = (ldata.lrc and ldata.lrc.lyric) or ""
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local lyr = parseLRC(lrc)
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if not lyr then lyr = parsePlain(lrc) end
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if lyr then
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cache[tk] = lyr
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evictCache()
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inFlight = nil
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noctalia.state.set("lyrics", lyr)
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elseif fallback then
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fallback()
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else
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inFlight = nil
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noctalia.state.set("lyrics", nil)
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end
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end)
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return
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end
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if ldata and ldata.lrc and ldata.lrc.lyric and ldata.lrc.lyric ~= "" then
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lyrics = parseLRC(ldata.lrc.lyric)
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if not lyrics then
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lyrics = parsePlain(ldata.lrc.lyric)
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end
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end
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end
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if lyrics then
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cache[tk] = lyrics
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evictCache()
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inFlight = nil
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noctalia.state.set("lyrics", lyrics)
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elseif fallback then
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fallback()
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else
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inFlight = nil
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noctalia.state.set("lyrics", nil)
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end
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end)
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end)
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end
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local query = track.title .. "\n" .. track.artist .. "\n" .. (track.album or "")
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local qTmp = (noctalia.pluginDir() or "/tmp") .. "/.query_cache.tmp"
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noctalia.writeFile(qTmp, query)
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local dir = noctalia.pluginDir() or "/tmp"
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local function applyParsed(parsed)
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if parsed and parsed.type == "krc" and parsed.lines then
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cache[tk] = parsed.lines
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evictCache()
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noctalia.state.set("lyrics", parsed.lines)
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return true
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end
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if parsed and parsed.type == "lrc" and parsed.lrc and parsed.lrc ~= "" then
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local lyr = parseLRC(parsed.lrc)
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if not lyr then lyr = parsePlain(parsed.lrc) end
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if lyr then
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cache[tk] = lyr
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evictCache()
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noctalia.state.set("lyrics", lyr)
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return true
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end
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end
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return false
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end
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local function runPy(script, cb)
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local py = 'python3 "' .. dir .. "/" .. script .. '" "' .. qTmp .. '"'
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noctalia.runAsync(py, function(r)
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if not inFlight then return end
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if tk ~= lastTrackKey then inFlight = nil; return end
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local ok, parsed = pcall(noctalia.json.decode, r.stdout or "")
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cb(ok and parsed or nil)
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end)
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end
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local function applyText(text)
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if not text or text == "" then return false end
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local parsed = parseLRC(text)
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if not parsed then parsed = parsePlain(text) end
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if not parsed then return false end
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cache[tk] = parsed
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evictCache()
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noctalia.state.set("lyrics", parsed)
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return true
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end
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local function fetchCustom()
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if customUrl == "" then
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inFlight = nil
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noctalia.state.set("lyrics", nil)
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return
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end
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local replacements = {
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title = track.title,
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artist = track.artist,
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album = track.album,
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duration = tostring(math.floor((track.duration or 0) / 1000000)),
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}
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local url = customUrl:gsub("{([%w_]+)}", function(key)
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return noctalia.string.urlEncode(replacements[key] or "")
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end)
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noctalia.http({ url = url, headers = { "Accept: application/json, text/plain" } }, function(response)
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if tk ~= lastTrackKey then inFlight = nil; return end
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local text = response.ok and response.body or ""
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if text ~= "" and customJsonField ~= "" then
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local decoded = noctalia.json.decode(text)
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for part in customJsonField:gmatch("[^.]+") do
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decoded = type(decoded) == "table" and decoded[part] or nil
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end
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if type(decoded) == "table" then
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cache[tk] = decoded
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evictCache()
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noctalia.state.set("lyrics", decoded)
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inFlight = nil
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return
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end
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text = type(decoded) == "string" and decoded or ""
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end
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applyText(text)
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inFlight = nil
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end)
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end
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if lyricsSource == "external" then
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inFlight = nil
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return
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elseif lyricsSource == "mpris" then
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applyText(embeddedLyrics)
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inFlight = nil
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return
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elseif lyricsSource == "custom" then
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fetchCustom()
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return
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elseif lyricsSource == "netease" then
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tryFetch(track.title .. " " .. track.artist, function()
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tryFetch(track.title, nil)
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end)
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return
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end
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-- Auto: LRCLIB, then the public NetEase API.
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runPy("lrclib_lyric.py", function(parsed)
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if applyParsed(parsed) then inFlight = nil; return end
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if lyricsSource == "lrclib" then
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inFlight = nil
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noctalia.state.set("lyrics", nil)
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return
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end
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tryFetch(track.title .. " " .. track.artist, function()
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tryFetch(track.title, nil)
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end)
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end)
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end
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local function fetchCover(track, artUrl)
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if coverInFlight then return end
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coverInFlight = track.title .. "|" .. track.artist .. "|" .. track.album
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local dest = coverPathFor(track)
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local apply = function(path)
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local tk = track.title .. "|" .. track.artist .. "|" .. track.album
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coverInFlight = nil
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if tk ~= lastTrackKey then return end
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coverCache[tk] = path
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noctalia.state.set("cover", path)
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end
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if not artUrl or artUrl == "" then
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noctalia.state.set("cover", nil)
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coverInFlight = nil
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return
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end
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if artUrl:sub(1, 7) == "file://" then
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local source = noctalia.string.urlDecode(artUrl:sub(8))
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if not noctalia.fileExists(source) then
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apply(nil)
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return
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end
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noctalia.runAsync("cp -- " .. shellQuote(source) .. " " .. shellQuote(dest), function(result)
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if result.exitCode == 0 then apply(dest) else apply(source) end
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end)
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return
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end
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noctalia.download(artUrl, dest, function(ok)
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if ok then apply(dest) else apply(nil) end
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end)
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end
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local function poll()
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local cmd = [[playerctl metadata --format $'{{lc(status)}}\x1f{{title}}\x1f{{artist}}\x1f{{album}}\x1f{{position}}\x1f{{mpris:length}}\x1f{{mpris:artUrl}}\x1f{{xesam:asText}}' 2>/dev/null]]
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noctalia.runAsync(cmd, function(r)
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if r.exitCode ~= 0 or not r.stdout or r.stdout == "" then
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noctalia.state.set("track", nil)
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noctalia.state.set("lyrics", nil)
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noctalia.state.set("cover", nil)
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noctalia.state.set("playing", false)
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return
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end
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local parts = {}
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local separator = string.char(31)
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for field in (r.stdout .. separator):gmatch("(.-)" .. separator) do
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parts[#parts + 1] = field:gsub("^%s+", ""):gsub("%s+$", "")
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end
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local status = parts[1] or "stopped"
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local title = parts[2] or ""
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local artist = parts[3] or ""
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local album = parts[4] or ""
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local artUrl = parts[7] or ""
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local embeddedLyrics = parts[8] or ""
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if title == "" and artist == "" then
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noctalia.state.set("track", nil)
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noctalia.state.set("lyrics", nil)
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noctalia.state.set("playing", status == "playing")
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return
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end
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local playing = status == "playing"
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local tk = title .. "|" .. artist .. "|" .. album
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local t = {
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title = title,
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artist = artist,
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album = album,
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status = status,
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position = tonumber(parts[5]) or 0,
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duration = tonumber(parts[6]) or 0,
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}
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currentTrack = t
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currentEmbeddedLyrics = embeddedLyrics
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noctalia.state.set("position", t.position)
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if tk ~= lastTrackKey then
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lastTrackKey = tk
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noctalia.state.set("track", t)
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noctalia.state.set("playing", playing)
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local cached = cache[tk]
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if cached then
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noctalia.state.set("lyrics", cached)
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else
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noctalia.state.set("lyrics", nil)
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fetchLyricsNetEase(t, embeddedLyrics)
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end
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local cachedCover = coverCache[tk]
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if cachedCover then
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noctalia.state.set("cover", cachedCover)
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else
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noctalia.state.set("cover", nil)
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fetchCover(t, artUrl)
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end
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else
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noctalia.state.set("track", t)
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noctalia.state.set("playing", playing)
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end
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end)
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end
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local pollTick = 0
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function update()
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if lyricsSource == "external" then return end
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pollTick = pollTick + 1
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if pollTick % 2 == 0 then
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poll()
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end
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end
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function onConfigChanged()
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local nextSource = noctalia.getConfig("lyrics_source") or "auto"
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local nextUrl = noctalia.getConfig("custom_url") or ""
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local nextField = noctalia.getConfig("custom_json_field") or "syncedLyrics"
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local sourceChanged = nextSource ~= lyricsSource or nextUrl ~= customUrl or nextField ~= customJsonField
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lyricsSource = nextSource
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customUrl = nextUrl
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customJsonField = nextField
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if sourceChanged and currentTrack then
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inFlight = nil
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cache = {}
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noctalia.state.set("lyrics", nil)
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fetchLyricsNetEase(currentTrack, currentEmbeddedLyrics)
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end
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end
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local function applyPushedLyrics(payload)
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local decoded = noctalia.json.decode(payload or "")
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if type(decoded) == "table" then
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if decoded.track then
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currentTrack = decoded.track
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lastTrackKey = (decoded.track.title or "") .. "|" .. (decoded.track.artist or "") .. "|" .. (decoded.track.album or "")
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noctalia.state.set("track", decoded.track)
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end
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if decoded.lines then noctalia.state.set("lyrics", decoded.lines) end
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if decoded.lyrics then
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local parsed = parseLRC(decoded.lyrics) or parsePlain(decoded.lyrics)
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noctalia.state.set("lyrics", parsed)
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end
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if decoded.position ~= nil then noctalia.state.set("position", decoded.position) end
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if decoded.playing ~= nil then noctalia.state.set("playing", decoded.playing == true) end
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if decoded.cover ~= nil then noctalia.state.set("cover", decoded.cover) end
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return true
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end
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return false
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end
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function onIpc(event, payload)
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if event == "push-lrc" then
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noctalia.state.set("lyrics", parseLRC(payload or "") or parsePlain(payload or ""))
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elseif event == "push-json" or event == "push-state" then
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applyPushedLyrics(payload)
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elseif event == "clear" then
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noctalia.state.set("lyrics", nil)
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end
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end
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if lyricsSource ~= "external" then poll() end
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