Initial commit

.gitignore

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+.stack-work/
+papering.cabal
+*~

ChangeLog.md

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+# Changelog for papering
+
+## Unreleased changes

LICENSE

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+Copyright Author name here (c) 2019
+
+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 Author name here 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.

README.md

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+# papering

Setup.hs

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+import Distribution.Simple
+main = defaultMain

app/Main.hs

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+{-# LANGUAGE OverloadedStrings #-}
+module Main where
+
+import Wallpapers
+
+main :: IO ()
+main = do
+  wallpapers <- getWallPapers
+  loopBackgrounds wallpapers
+  print "starting"

package.yaml

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+name:                papering
+version:             0.1.0.0
+github:              "githubuser/papering"
+license:             BSD3
+author:              "Author name here"
+maintainer:          "example@example.com"
+copyright:           "2019 Author name here"
+
+extra-source-files:
+- README.md
+- ChangeLog.md
+
+# Metadata used when publishing your package
+# synopsis:            Short description of your package
+# category:            Web
+
+# To avoid duplicated efforts in documentation and dealing with the
+# complications of embedding Haddock markup inside cabal files, it is
+# common to point users to the README.md file.
+description:         Please see the README on GitHub at <https://github.com/githubuser/papering#readme>
+
+dependencies:
+- base >= 4.7 && < 5
+
+library:
+  source-dirs: src
+
+executables:
+  papering-exe:
+    main:                Main.hs
+    source-dirs:         app
+    ghc-options:
+    - -threaded
+    - -rtsopts
+    - -with-rtsopts=-N
+    dependencies:
+    - papering
+
+tests:
+  papering-test:
+    main:                Spec.hs
+    source-dirs:         test
+    ghc-options:
+    - -threaded
+    - -rtsopts
+    - -with-rtsopts=-N
+    dependencies:
+    - papering

src/Download.hs

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+{-# LANGUAGE OverloadedStrings #-}
+module Download
+      (
+        getImgurGallery
+       ,filterTags
+      ) where
+
+import Network.Wreq
+
+-- Operators such as (&) and (.~).
+import Control.Lens
+import Control.Monad
+import Control.Monad.IO.Class
+import Control.Applicative
+import Data.Maybe
+
+-- Conversion of Haskell values to JSON.
+import Data.Aeson (toJSON)
+
+-- Easy traversal of JSON data.
+import Data.Aeson.Lens (key, nth)
+
+import Text.HTML.TagSoup
+import Text.HTML.TagSoup.Match
+
+getImgurGallery identity = do
+  r <- get ("https://imgur.com/gallery/" ++ identity)
+  let tags = parseTags <$> r ^? responseBody
+  return $ maybe [] id tags
+
+filterTags tags =
+  mapM_ print [ t | t <- tags,
+    tagOpen (\x -> x == "a") (const True) t]

src/Wallpapers.hs

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+{-# LANGUAGE OverloadedStrings #-}
+module Wallpapers
+    ( getWallPapers
+    , setBackground
+    , loopBackgrounds
+    ) where
+
+import System.Directory
+import System.Process
+
+import Control.Applicative
+import Control.Concurrent
+import Download
+
+fiveMinutes = 300000000
+
+getWallPapers = do
+  home <- getHomeDirectory
+  setCurrentDirectory (home ++ "/wallpapers")
+  wallpapers <- (listDirectory $ home ++ "/wallpapers")
+  sequence $ makeAbsolute <$> wallpapers
+
+setBackground :: FilePath -> IO ()
+setBackground path = callCommand $ "/usr/bin/feh --bg-scale " ++ path
+
+loopBackgrounds images = forkIO $ loopBackgrounds' (cycle images) where
+  loopBackgrounds' (image:images) = do
+    setBackground image
+    threadDelay fiveMinutes
+    loopBackgrounds' images

stack.yaml

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+# This file was automatically generated by 'stack init'
+#
+# Some commonly used options have been documented as comments in this file.
+# For advanced use and comprehensive documentation of the format, please see:
+# https://docs.haskellstack.org/en/stable/yaml_configuration/
+
+# Resolver to choose a 'specific' stackage snapshot or a compiler version.
+# A snapshot resolver dictates the compiler version and the set of packages
+# to be used for project dependencies. For example:
+#
+# resolver: lts-3.5
+# resolver: nightly-2015-09-21
+# resolver: ghc-7.10.2
+#
+# The location of a snapshot can be provided as a file or url. Stack assumes
+# a snapshot provided as a file might change, whereas a url resource does not.
+#
+# resolver: ./custom-snapshot.yaml
+# resolver: https://example.com/snapshots/2018-01-01.yaml
+resolver: lts-13.10
+
+# User packages to be built.
+# Various formats can be used as shown in the example below.
+#
+# packages:
+# - some-directory
+# - https://example.com/foo/bar/baz-0.0.2.tar.gz
+# - location:
+#    git: https://github.com/commercialhaskell/stack.git
+#    commit: e7b331f14bcffb8367cd58fbfc8b40ec7642100a
+# - location: https://github.com/commercialhaskell/stack/commit/e7b331f14bcffb8367cd58fbfc8b40ec7642100a
+#  subdirs:
+#  - auto-update
+#  - wai
+packages:
+- .
+# Dependency packages to be pulled from upstream that are not in the resolver
+# using the same syntax as the packages field.
+# (e.g., acme-missiles-0.3)
+# extra-deps: []
+
+# Override default flag values for local packages and extra-deps
+# flags: {}
+
+# Extra package databases containing global packages
+# extra-package-dbs: []
+
+# Control whether we use the GHC we find on the path
+# system-ghc: true
+#
+# Require a specific version of stack, using version ranges
+# require-stack-version: -any # Default
+# require-stack-version: ">=1.9"
+#
+# Override the architecture used by stack, especially useful on Windows
+# arch: i386
+# arch: x86_64
+#
+# Extra directories used by stack for building
+# extra-include-dirs: [/path/to/dir]
+# extra-lib-dirs: [/path/to/dir]
+#
+# Allow a newer minor version of GHC than the snapshot specifies
+# compiler-check: newer-minor

test/Spec.hs

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