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|
#!/usr/bin/env lua
--
-- A simple program to display which places are currently open
--
-- Usage: nowopen [-r|--random] [-p|--plain] [-w|--where] [-e|--edit] [-h|--help] [tag1 tag2...]
--
-- Establishments matching any of the specified tags (prefix matching is used)
-- and the amount of time till they close will be printed.
--
-- Business hours will be looked up in ~/.local/share/nowopen/businesshours or
-- ~/.businesshours and have the format:
--
-- Joe's Diner (restaurant, diner):
-- 6am-1am
-- fri-sat: 6am-3am
-- sun: closed
--
local XDG_DATA_HOME = os.getenv("XDG_DATA_HOME") or "~/.local/share"
if arg[1] == '-w' or arg[1] == '--where' then
print(XDG_DATA_HOME..'/nowopen/businesshours')
os.exit(0)
elseif arg[1] == '-e' or arg[1] == '--edit' then
local editor = os.getenv("EDITOR") or "vim"
os.execute(editor.." "..XDG_DATA_HOME..'/nowopen/businesshours')
os.exit(0)
end
local f = io.open(XDG_DATA_HOME..'/nowopen/businesshours') or io.open('~/.businesshours')
if not f then
print("Could not find config file.\n"
.."Please create a config file in either "
..XDG_DATA_HOME.."/nowopen/businesshours or ~/.businesshours\n"
.."For an example, see the 'example_businesshours' file included with nowopen.")
os.exit(1)
end
local place_text = f:read("*a")
f:close()
local raw_print = false
local randomize = false
for i=#arg,1,-1 do
if arg[i] == "-p" or arg[i] == "--plain" then
raw_print = true
table.remove(arg, i)
elseif arg[i] == "-r" or arg[i] == "--random" then
randomize = true
table.remove(arg, i)
elseif arg[i] == "-h" or arg[i] == "--help" then
print([[
nowopen: show which businesses are now open.
Usage: nowopen [-p|--plain] [-r|--random] [-w|--where] [-e|--edit] [-h|--help] [tags...]
-p: Print plain text to stdout
-r: Randomly pick one available option
-w: Print where the config file is and exit
-e: Edit the nowopen file and exit
--help: display this message
tags: if provided, only show businesses that match one of the given tags
]])
os.exit(0)
end
end
local today = os.date("*t")
local now = os.time(today)
local function hours(t)
return math.floor(t/3600)
end
local function mins(t)
return math.floor((t/60) % 60)
end
local function secs(t)
return math.floor(t % 60)
end
local re = require('re')
local dsl = re.compile([=[
file <- {| (place / ws? comment? %nl)* |} {.+}?
place <- {|
{:name: {word (ws word)*} :}
ws? ("(" ws? {:tags: {| {tag} (ws? "," ws? {tag})* ws? |} :} ")")? ws? ":"
({:times: {|
((ws? comment? %nl)+ (%tab / " "^+2) ws?
{| days ws? ("closed" / (time_range (ws* "," ws* time_range)*)) |})+
|} :})
|}
comment <- "#" [^%nl]*
days <-
({:from: {[a-zA-Z]+} :} ws? "-" ws? {:to: {[a-zA-Z]+} :} ws? ":")
/({:from: {[a-zA-Z]+} :} ws? ":")
/({:from:''->'sun':} {:to:''->'sat':})
time_range <- {| {:open: time :} ws? "-" ws? {:close: time :} |}
time <- {|
{:hour: {[0-9]+} :} (":" {:minute: {[0-9]+} :})? ws? {:ampm: { "am" / "pm"} :}
/ ("noon" {:hour: {~''->'12'~} :} {:ampm: {~''->'pm'~} :})
/ ("midnight" {:hour: {~''->'12'~} :} {:ampm: {~''->'am'~} :})
|}
tag <- word (ws word)*
word <- [^%nl%tab (),:#-]+
ws <- [ %tab]+
]=], {tab="\t"})
local places,err = dsl:match(place_text)
if err then
print("Failed to parse config file:")
print(place_text:sub(1,#place_text-#err).."\x1b[31;7m"..err.."\x1b[0m")
os.exit(1)
end
local weekdays = {"sunday","monday","tuesday","wednesday","thursday","friday","saturday"}
local function get_weekday(str)
for i,w in ipairs(weekdays) do
if w:sub(1,#str):lower() == str:lower() then return i end
end
end
local options = {}
for i,place in ipairs(places) do
if arg[1] then
for _,request_tag in ipairs(arg) do
for _,tag in ipairs(place.tags) do
if tag:sub(1,#request_tag) == request_tag then goto carry_on end
end
end
goto next_place
::carry_on::
end
local today_times = nil
for _,time in ipairs(place.times) do
local from, to = get_weekday(time.from), get_weekday(time.to or time.from)
if (from <= to and from <= today.wday and today.wday <= to) -- no wraparound (e.g. mon-wed)
or (from > to and (today.wday >= from or today.wday <= to)) then -- wraparound (e.g. fri-tues)
today_times = time
end
end
local function t(time)
local hour24 = tonumber(time.hour)
local minute = tonumber(time.minute or 0)
if hour24 == 12 then
if time.ampm == 'am' then hour24 = hour24 - 12 end
else
if time.ampm == 'pm' then hour24 = hour24 + 12 end
end
local t = os.time{hour=hour24, min=minute, year=today.year, month=today.month, day=today.day}
while t < now do t = t + 24*60*60 end
return t
end
if today_times and today_times[1] then
for _, window in ipairs(today_times) do
local until_open = t(window.open) - now
local until_close = t(window.close) - now
if until_close < until_open then
table.insert(options, {name=place.name, until_close=until_close})
end
end
end
::next_place::
end
local rows, cols = 0, 0
if not raw_print then
local p = io.popen("tput cols")
cols = tonumber(p:read("*a"))
p:close()
local p = io.popen("tput lines")
rows = tonumber(p:read("*a"))
p:close()
end
local output = raw_print and io.output() or io.popen("less -r", "w")
local function displaylen(str) return utf8.len((str:gsub("\x1b%[[0-9;]*m", ""))) end
local function center(str, n) return (" "):rep((n-displaylen(str))//2)..str..(" "):rep((n-displaylen(str))//2) end
local function lpad(str, n) return (" "):rep(n-displaylen(str))..str end
local lines = {}
local colors = setmetatable({[0]="\x1b[31;1m",[1]="\x1b[33;1m"}, {__index=function() return "\x1b[32;1m" end})
if #options == 0 and not raw_print then
table.insert(lines, center("\x1b[1mSorry, nothing's open\x1b[0m", cols))
table.insert(lines, "")
table.insert(lines, center("¯\\_(ツ)_/¯", cols))
else
if randomize then
math.randomseed(os.time())
options = {options[math.random(#options)]}
else
table.sort(options, function(o1, o2) return o1.until_close < o2.until_close end)
end
local max_line = 0
for _,option in ipairs(options) do
local line = ("%s: %2s:%02d left"):format(
option.name, hours(option.until_close), mins(option.until_close))
if not raw_print then line = " "..colors[hours(option.until_close)]..line.."\x1b[0m " end
if displaylen(line) > max_line then max_line = displaylen(line) end
table.insert(lines, line)
end
if not raw_print then
for i, line in ipairs(lines) do lines[i] = center(lpad(line, max_line), cols) end
if randomize then
table.insert(lines, 1, center("\x1b[7m"..center("Your Random Selection", max_line).."\x1b[0m", cols))
else
table.insert(lines, 1, center("\x1b[7m"..center("Open Now", max_line).."\x1b[0m", cols))
end
table.insert(lines, 2, "")
end
end
if not raw_print then output:write(("\n"):rep((rows-#lines)//2)) end
output:write(table.concat(lines, "\n"))
if not raw_print then output:write(("\n"):rep((rows-#lines)//2)) end
if raw_print then output:write("\n") end
output:close()
|
