initial commit

.gitignore

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+.cabal-sandbox
+cabal.sandbox.config
+dist
+*.log
+*.swp
+*~
+.ghci
+.stack-work
+container/.DS_Store

LICENSE

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+Copyright Example Yann Esposito (c) 2015
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Yann Esposito nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Setup.hs

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+import Distribution.Simple
+main = defaultMain

human-readable-duration.cabal

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+name:                human-readable-duration
+version:             0.1.0.0
+synopsis:            Provide duration helper
+description:         Please see README.md
+homepage:            http://github.com/yogsototh/human-readable-duration#readme
+license:             BSD3
+license-file:        LICENSE
+author:              Yann Esposito
+maintainer:          yann.esposito@gmail.com
+category:            Time
+build-type:          Simple
+-- extra-source-files:
+cabal-version:       >=1.10
+
+library
+  hs-source-dirs:      src
+  exposed-modules:     Data.Duration
+  build-depends:       base >= 4.7 && < 5
+  default-language:    Haskell2010
+
+-- test-suite human-readable-duration-test
+--   type:                exitcode-stdio-1.0
+--   hs-source-dirs:      test
+--   main-is:             Spec.hs
+--   build-depends:       base
+--                      , human-readable-duration
+--   ghc-options:         -threaded -rtsopts -with-rtsopts=-N
+--   default-language:    Haskell2010
+
+source-repository head
+  type:     git
+  location: https://github.com/yogstoth/human-readable-duration

src/Data/Duration.hs

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+module Data.Duration
+    ( humanReadableDuration
+    -- durations
+    , oneSecond
+    , minute
+    , hour
+    , day
+    , year
+    -- Retrieve
+    , getMs
+    , getSeconds
+    , getMinutes
+    , getHours
+    , getDays
+    , getYears
+    ) where
+
+
+-- | `humanReadableDuration` take some time in micro-seconds and render a human readable duration.
+-- Typically:
+-- humanReadableDuration (10^6 * 60) --> 1 min
+-- This isn't made to be fast. It uses String.
+humanReadableDuration :: Int -> String
+humanReadableDuration n
+  | n < oneSecond = let ms = getMs      n in if ms > 0 then show ms ++ "ms" else ""
+  | n < minute = let s  = getSeconds n in if s  > 0 then show s  ++ "s " ++ humanReadableDuration (n `rem` oneSecond) else ""
+  | n < hour   = let m  = getMinutes n in if m  > 0 then show m  ++ " min " ++ humanReadableDuration (n `rem` minute) else ""
+  | n < day    = let h  = getHours   n in if h  > 0 then show h  ++ " hours " ++ humanReadableDuration (n `rem` hour) else ""
+  | n < year   = let d  = getDays    n in if d  > 0 then show d  ++ " days " ++ humanReadableDuration (n `rem` day) else ""
+  | otherwise  = let y  = getYears   n in if y  > 0 then show y  ++ " years " ++ humanReadableDuration (n `rem` year) else ""
+
+--------------------------------------------------------------------------------
+-- Durations
+--------------------------------------------------------------------------------
+-- | number of micro seconds in one second
+oneSecond :: Int
+oneSecond = 10^(6 :: Integer)
+
+-- | number of micro seconds in one minute
+minute :: Int
+minute = 60 * oneSecond
+
+-- | number of micro seconds in one hour
+hour :: Int
+hour = 60 * minute
+
+-- | number of micro seconds in one day
+day :: Int
+day = 24 * hour
+
+-- | number of micro seconds in one year
+year :: Int
+year = 365 * day
+
+--------------------------------------------------------------------------------
+-- Retrieve some durations
+--------------------------------------------------------------------------------
+-- | number of milli seconds given a duration in micro seconds
+getMs :: Int -> Int
+getMs n = (n `rem` oneSecond) `div` 1000
+
+-- | number of seconds given a duration in micro seconds
+getSeconds :: Int -> Int
+getSeconds n = (n `rem` minute) `div` oneSecond
+
+-- | number of minutes given a duration in micro seconds
+getMinutes :: Int -> Int
+getMinutes n = (n `rem` hour) `div` minute
+
+-- | number of hours given a duration in micro seconds
+getHours :: Int -> Int
+getHours n = n `div` hour
+
+-- | number of days given a duration in micro seconds
+getDays :: Int -> Int
+getDays n = n `div` day
+
+-- | number of years given a duration in micro seconds
+getYears :: Int -> Int
+getYears n = n `div` year

stack.yaml

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+flags: {}
+packages:
+- '.'
+extra-deps: []
+resolver: lts-2.22

test/Spec.hs

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+main :: IO ()
+main = putStrLn "Test suite not yet implemented"