HaskerDeux

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Overview
Comment:Handle automatic re-login on each separate curl call

I.e. rather than check the validity of the token each time by making a
curl call to get a list of todos (whatever action is being performed)
just assume the token is valid and wait for the actual action to fail.
Relogin at that point and re-call that action.

It's still messy, but I think this approach is right - it'll just be my
implementation of it that lets the side down.

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SHA3-256: 76a89c1a9bdfb7f3df1ac871310da3420d1603816a5cdeb14531a308dbf05300
User & Date: base@atomicules.co.uk 2017-10-29 17:10:37
Context
2019-02-08
12:52
Add comment for future list usage support check-in: 0fe877fd3b user: atomicules tags: master, origin/issue1, trunk
2017-10-29
17:10
Handle automatic re-login on each separate curl call

I.e. rather than check the validity of the token each time by making a
curl call to get a list of todos (whatever action is being performed)
just assume the token is valid and wait for the actual action to fail.
Relogin at that point and re-call that action.

It's still messy, but I think this approach is right - it'll just be my
implementation of it that lets the side down. check-in: 76a89c1a9b user: base@atomicules.co.uk tags: master, origin/issue1, trunk

2017-10-22
10:56
Sort out markup in README check-in: a393b4c91b user: base@atomicules.co.uk tags: master, origin/issue1, trunk
Changes
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Changes to haskerdeux.hs.

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	time <- getClockTime >>= toCalendarTime --https://wiki.haskell.org/Unix_tools/Date
	let todays_date = formatCalendarTime defaultTimeLocale "%Y-%m-%d" time
	let tomorrows_date = show (addDays 1 $ read todays_date::Data.Time.Day)
	let  todos_date | date == "today" = todays_date
	                | date == "tomorrow" = tomorrows_date
	                | otherwise = date
	when ((command `elem` ["todos"] && Data.List.null argList) || (command `elem` ["new", "crossoff", "putoff", "delete"] && length argList == 1) || (command == "moveto" && length argList == 2)) $ do
		username <- fmap fst readnetrc
		password <- fmap snd readnetrc
		token <- login [username, password]
		dispatch command (token, todos_date:argList)


readnetrc = do
	home <- getHomeDirectory
	netrc <- lines Control.Applicative.<$> readFile (home ++ "/.netrc")
	let netrc' = dropWhile (not . ("teuxdeux" `isInfixOf`)) netrc
	let (username, password) = if "login" `isInfixOf` head netrc'
		-- if entry is on one line	
		then (getcred "login", getcred "password") 
		-- if entry is on multiple lines
		else (last $ words $ netrc' !! 1, last $ words $ netrc' !! 2)
		where getcred c = dropWhile (not . (c `isInfixOf`)) (words $ head netrc') !! 1
	return (username, password)


curlget (token, date) = do
	let curlheader = "X-CSRF-Token: " ++ token
	body <- readProcess "curl" ["-s", "-L", "-c", "haskerdeux.cookies", "-b", "haskerdeux.cookies", "-H", curlheader, "https://teuxdeux.com/api/v1/todos/calendar?begin_date="++date++"&end_date="++date] []



	let tds = decodeJSON body :: [Teuxdeux]
	let tdsf = Data.List.filter (\td -> current_date td == date && not (done td)) tds
	return tdsf



	

curlpost (token, [date, key, value, apiurl, okresponse]) number = do
	let curlheader = "X-CSRF-Token: " ++ token
	--Can be much improved, but will do for now:
	json <- if isJust number
		then do
			tdsf <- curlget (token, date)
			let itemid = Main.id $ tdsf!!(read (fromJust number)::Int)
			let modjson = "{ \"ids\" : [\""++show itemid++"\"], \""++key++"\" : \""++value++"\"}"
			return modjson
		else do
			--Can't just straight return these strings, need to let them first
			let newjson = "{ \"current_date\" : \""++date++"\", \""++key++"\" : \""++value++"\"}"
			return newjson
	body <- readProcess "curl" ["-s", "-XPOST", apiurl, "-L", "-c", "haskerdeux.cookies", "-b", "haskerdeux.cookies", "-H", curlheader, "-H", "Content-Type: application/json", "-d", json] []



	if "done_updated_at" `isInfixOf` body
		then putStrLn okresponse
		else putStrLn "Uh Oh! Didn't work!"





curldelete (token, [date, apiurl, okresponse]) number = do
	tdsf <- curlget (token, date)
	let itemid = Main.id $ tdsf!!(read number::Int)
	let curlheader = "X-CSRF-Token: " ++ token
	body <- readProcess "curl" ["-s", "-XDELETE", apiurl++show itemid, "-c", "haskerdeux.cookies", "-b", "haskerdeux.cookies", "-H", curlheader] []



	if "done_updated_at" `isInfixOf` body
		then putStrLn okresponse
		else putStrLn "Uh Oh! Didn't work!"





curlput (token, [date, json, apiurl, okresponse]) number = do
	tdsf <- curlget (token, date)
	let itemid = Main.id $ tdsf!!(read number::Int)
	let curlheader = "X-CSRF-Token: " ++ token
	body <- readProcess "curl" ["-s", "-XPUT", apiurl++show itemid, "-L", "-c", "haskerdeux.cookies", "-b", "haskerdeux.cookies", "-H", curlheader, "-H", "Content-Type: application/json", "-d", json] []



	if "done_updated_at" `isInfixOf` body
		then putStrLn okresponse
		else putStrLn "Uh Oh! Didn't work!"





getauthtoken body = do
	let bodylines = lines body
	let authline = dropWhile (not . ("authenticity_token" `isInfixOf`)) bodylines
	let authwords = words $ head authline
	let authtokenword = stripPrefix "value=\"" $ last authwords
	let revauthtokenword = reverse $ fromJust authtokenword
	let authtoken = reverse $ fromJust $ stripPrefix ">\"" revauthtokenword
	return authtoken


login [username, password] = do


	home <- getHomeDirectory
	savedtoken <- doesFileExist (home ++ "/.haskerdeux-token")
	--Need to make a query here and check token is still valid
	--I am aware this is horribly unhaskelly and I plan on sorting that.
	if savedtoken
		then do
			token <- readFile (home ++ "/.haskerdeux-token")
			time <- getClockTime >>= toCalendarTime --https://wiki.haskell.org/Unix_tools/Date
			let date = formatCalendarTime defaultTimeLocale "%Y-%m-%d" time
			let curlheader = "X-CSRF-Token: " ++ token
			body <- readProcess "curl" ["-s", "-L", "-c", "haskerdeux.cookies", "-b", "haskerdeux.cookies", "-H", curlheader, "https://teuxdeux.com/api/v1/todos/calendar?begin_date="++date++"&end_date="++date] []
			let ok = not ("Invalid CSRF Token" `isInfixOf` body)
			if ok
				then
					return token
				else do
					removeFile (home ++ "/.haskerdeux-token")
					login [username, password]
		else do
			body <- readProcess "curl" ["-s", "-L", "-c", "haskerdeux.cookies", "https://teuxdeux.com/login"] []
			token <- getauthtoken body
			writeFile (home ++ "/.haskerdeux-token") token
			let curlheader = "X-CSRF-Token: " ++ token
			let curlpostfields = "username=" ++ username ++ "&password=" ++ password ++ "&authenticity_token=" ++ token
			body <- readProcess "curl" ["-s", "-L", "-c", "haskerdeux.cookies", "-b", "haskerdeux.cookies", "-H", curlheader, "-d", curlpostfields, "https://teuxdeux.com/login"] []
			return token









todos (token, [todos_date]) = do
	tdsf <- curlget (token, todos_date)
	putStr $ unlines $ zipWith (\n td -> show n ++ " - " ++ td) [0..] $ Data.List.map text tdsf --numbering from LYAH


new (token, [todos_date, todo]) = do 








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	time <- getClockTime >>= toCalendarTime --https://wiki.haskell.org/Unix_tools/Date
	let todays_date = formatCalendarTime defaultTimeLocale "%Y-%m-%d" time
	let tomorrows_date = show (addDays 1 $ read todays_date::Data.Time.Day)
	let  todos_date | date == "today" = todays_date
	                | date == "tomorrow" = tomorrows_date
	                | otherwise = date
	when ((command `elem` ["todos"] && Data.List.null argList) || (command `elem` ["new", "crossoff", "putoff", "delete"] && length argList == 1) || (command == "moveto" && length argList == 2)) $ do


		token <- login
		dispatch command (token, todos_date:argList)


readnetrc = do
	home <- getHomeDirectory
	netrc <- lines Control.Applicative.<$> readFile (home ++ "/.netrc")
	let netrc' = dropWhile (not . ("teuxdeux" `isInfixOf`)) netrc
	let (username, password) = if "login" `isInfixOf` head netrc'
		-- if entry is on one line	
		then (getcred "login", getcred "password") 
		-- if entry is on multiple lines
		else (last $ words $ netrc' !! 1, last $ words $ netrc' !! 2)
		where getcred c = dropWhile (not . (c `isInfixOf`)) (words $ head netrc') !! 1
	return (username, password)


curlget (token, date) = do
	let curlheader = "X-CSRF-Token: " ++ token
	body <- readProcess "curl" ["-s", "-L", "-c", "haskerdeux.cookies", "-b", "haskerdeux.cookies", "-H", curlheader, "https://teuxdeux.com/api/v1/todos/calendar?begin_date="++date++"&end_date="++date] []
	let ok = not ("Invalid CSRF Token" `isInfixOf` body)
	if ok
		then do
			let tds = decodeJSON body :: [Teuxdeux]
			let tdsf = Data.List.filter (\td -> current_date td == date && not (done td)) tds
			return tdsf
		else do
			token <- relogin 
			curlget (token, date)
	

curlpost (token, [date, key, value, apiurl, okresponse]) number = do
	let curlheader = "X-CSRF-Token: " ++ token
	--Can be much improved, but will do for now:
	json <- if isJust number
		then do
			tdsf <- curlget (token, date)
			let itemid = Main.id $ tdsf!!(read (fromJust number)::Int)
			let modjson = "{ \"ids\" : [\""++show itemid++"\"], \""++key++"\" : \""++value++"\"}"
			return modjson
		else do
			--Can't just straight return these strings, need to let them first
			let newjson = "{ \"current_date\" : \""++date++"\", \""++key++"\" : \""++value++"\"}"
			return newjson
	body <- readProcess "curl" ["-s", "-XPOST", apiurl, "-L", "-c", "haskerdeux.cookies", "-b", "haskerdeux.cookies", "-H", curlheader, "-H", "Content-Type: application/json", "-d", json] []
	let ok = not ("Invalid CSRF Token" `isInfixOf` body)
	if ok
		then
			if "done_updated_at" `isInfixOf` body
				then putStrLn okresponse
				else putStrLn "Uh Oh! Didn't work!"
		else do
			token <- relogin 
			curlpost (token, [date, key, value, apiurl, okresponse]) number


curldelete (token, [date, apiurl, okresponse]) number = do
	tdsf <- curlget (token, date)
	let itemid = Main.id $ tdsf!!(read number::Int)
	let curlheader = "X-CSRF-Token: " ++ token
	body <- readProcess "curl" ["-s", "-XDELETE", apiurl++show itemid, "-c", "haskerdeux.cookies", "-b", "haskerdeux.cookies", "-H", curlheader] []
	let ok = not ("Invalid CSRF Token" `isInfixOf` body)
	if ok
		then
			if "done_updated_at" `isInfixOf` body
				then putStrLn okresponse
				else putStrLn "Uh Oh! Didn't work!"
		else do
			token <- relogin 
			curldelete (token, [date, apiurl, okresponse]) number


curlput (token, [date, json, apiurl, okresponse]) number = do
	tdsf <- curlget (token, date)
	let itemid = Main.id $ tdsf!!(read number::Int)
	let curlheader = "X-CSRF-Token: " ++ token
	body <- readProcess "curl" ["-s", "-XPUT", apiurl++show itemid, "-L", "-c", "haskerdeux.cookies", "-b", "haskerdeux.cookies", "-H", curlheader, "-H", "Content-Type: application/json", "-d", json] []
	let ok = not ("Invalid CSRF Token" `isInfixOf` body)
	if ok
		then
			if "done_updated_at" `isInfixOf` body
				then putStrLn okresponse
				else putStrLn "Uh Oh! Didn't work!"
		else do
			token <- relogin 
			curlput (token, [date, json, apiurl, okresponse]) number


getauthtoken body = do
	let bodylines = lines body
	let authline = dropWhile (not . ("authenticity_token" `isInfixOf`)) bodylines
	let authwords = words $ head authline
	let authtokenword = stripPrefix "value=\"" $ last authwords
	let revauthtokenword = reverse $ fromJust authtokenword
	let authtoken = reverse $ fromJust $ stripPrefix ">\"" revauthtokenword
	return authtoken


login  = do
	username <- fmap fst readnetrc
	password <- fmap snd readnetrc
	home <- getHomeDirectory
	savedtoken <- doesFileExist (home ++ "/.haskerdeux-token")


	if savedtoken
		then do
			token <- readFile (home ++ "/.haskerdeux-token")







			return token



		else do
			body <- readProcess "curl" ["-s", "-L", "-c", "haskerdeux.cookies", "https://teuxdeux.com/login"] []
			token <- getauthtoken body
			writeFile (home ++ "/.haskerdeux-token") token
			let curlheader = "X-CSRF-Token: " ++ token
			let curlpostfields = "username=" ++ username ++ "&password=" ++ password ++ "&authenticity_token=" ++ token
			body <- readProcess "curl" ["-s", "-L", "-c", "haskerdeux.cookies", "-b", "haskerdeux.cookies", "-H", curlheader, "-d", curlpostfields, "https://teuxdeux.com/login"] []
			return token


relogin = do
	home <- getHomeDirectory
	removeFile (home ++ "/.haskerdeux-token")
	token <- login
	return token
	

todos (token, [todos_date]) = do
	tdsf <- curlget (token, todos_date)
	putStr $ unlines $ zipWith (\n td -> show n ++ " - " ++ td) [0..] $ Data.List.map text tdsf --numbering from LYAH


new (token, [todos_date, todo]) = do
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