add code

.gitignore

@@ -0,0 +1,20 @@
+dist
+dist-*
+cabal-dev
+*.o
+*.hi
+*.chi
+*.chs.h
+*.dyn_o
+*.dyn_hi
+.hpc
+.hsenv
+.cabal-sandbox/
+cabal.sandbox.config
+*.prof
+*.aux
+*.hp
+*.eventlog
+.stack-work/
+cabal.project.local
+.HTF/

LICENSE

@@ -0,0 +1,30 @@
+Copyright Author name here (c) 2017
+
+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.

Setup.hs

@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain

addon-manifest.json

@@ -0,0 +1,20 @@
+{
+  "id": "constellation",
+  "name": "Constellation Downtime Alert Silencer",
+  "cli_plugin_name": "heroku-constellation",
+  "api": {
+    "password": "hunter2",
+    "sso_salt": "no really hunter2",
+    "regions": ["us","eu"],
+    "requires": ["log_input", "many_per_app", "attachable"],
+    "production": {
+      "base_url": "https://constellation.greedo.xeserv.us/heroku/resources",
+      "sso_url": "https://constellation.greedo.xeserv.us/sso/login"
+    },
+    "test": {
+      "base_url": "http://localhost:4567/heroku/resources",
+      "sso_url": "http://localhost:4567/sso/login"
+    },
+    "version": "1"
+  }
+}

app/Main.hs

@@ -0,0 +1,6 @@
+module Main where
+
+import Lib
+
+main :: IO ()
+main = startApp

constellation.cabal

@@ -0,0 +1,62 @@
+name:                constellation
+version:             0.1.0.0
+homepage:            https://github.com/githubuser/constellation#readme
+license:             BSD3
+license-file:        LICENSE
+author:              Author name here
+maintainer:          example@example.com
+copyright:           2017 Author name here
+category:            Web
+build-type:          Simple
+extra-source-files:  README.md
+cabal-version:       >=1.10
+
+library
+  hs-source-dirs:      src
+  exposed-modules:     Lib
+                     , Models
+                     , Heroku.Types
+                     , Types
+                     , Routes
+  ghc-options:         -pgmL markdown-unlit
+  build-depends:       base
+                     , aeson
+                     , servant
+                     , servant-client
+                     , servant-server
+                     , wai
+                     , warp
+                     , groundhog
+                     , groundhog-th
+                     , groundhog-postgresql
+                     , text
+                     , markdown-unlit
+                     , resource-pool
+                     , postgresql-simple-url
+                     , bytestring
+  default-language:    Haskell2010
+
+executable constellation-exe
+  hs-source-dirs:      app
+  main-is:             Main.hs
+  ghc-options:         -threaded -rtsopts -with-rtsopts=-N -with-rtsopts=-T
+  build-depends:       base
+                     , constellation
+  default-language:    Haskell2010
+
+test-suite constellation-test
+  type:                exitcode-stdio-1.0
+  hs-source-dirs:      test
+  main-is:             Spec.hs
+  build-depends:       base
+                     , constellation
+                     , hspec
+                     , hspec-wai
+                     , hspec-wai-json
+                     , aeson
+  ghc-options:         -threaded -rtsopts -with-rtsopts=-N
+  default-language:    Haskell2010
+
+source-repository head
+  type:     git
+  location: https://github.com/githubuser/constellation

links.txt

@@ -0,0 +1,9 @@
+https://pbrisbin.com/posts/parsing_database_url/
+https://haskellonheroku.com/tutorial/
+https://github.com/mfine/heroku-buildpack-stack
+https://github.com/haskell-servant/example-servant-persistent/blob/master/src/Models.hs
+https://devcenter.heroku.com/articles/add-on-partner-api
+https://devcenter.heroku.com/articles/add-on-manifest
+https://stackoverflow.com/questions/24821364/how-to-store-an-enum-adt-in-persistent
+https://stackoverflow.com/questions/30062707/foreign-key-constraints-in-yesod-persistent
+https://github.com/heroku/kensa

src/Heroku/Types.lhs

@@ -0,0 +1 @@
+Types.md

src/Heroku/Types.md

@@ -0,0 +1,42 @@
+`Heroku.Types`
+==============
+
+This module defines some essential types the [Heroku Partner API][addon-partner-api] uses.
+
+Module Header
+-------------
+
+```haskell
+{-# LANGUAGE DeriveGeneric #-}
+
+-- | This file is a literate haskell document. Please see the source code for more information.
+module Heroku.Types
+
+import Data.Aeson
+import Data.Text
+import GHC.Generics
+```
+
+Provision Request
+-----------------
+
+This datatype is defined [here][provision-type].
+
+```haskell
+data Provision = Provision
+               { heroku_id     :: Text
+               , plan          :: Text
+               , region        :: Text
+               , callback_url  :: Text
+               , options       :: Object -- Generic "anything" for JSON data
+               , uuid          :: Text
+               , log_input_url :: Text
+               } deriving (Read, Show, Eq, Generic)
+
+instance ToJSON Provision
+instance FromJSON Provision
+```
+
+---
+[addon-partner-api]: https://devcenter.heroku.com/articles/add-on-partner-api
+[provision-type]: https://devcenter.heroku.com/articles/add-on-partner-api#provision

src/Lib.hs

@@ -0,0 +1,34 @@
+{-# LANGUAGE DataKinds       #-}
+{-# LANGUAGE TemplateHaskell #-}
+{-# LANGUAGE TypeOperators   #-}
+module Lib
+    ( startApp
+    , app
+    ) where
+
+import Data.Bytestring
+import Data.Maybe
+import Network.Wai
+import Network.Wai.Handler.Warp
+import Servant
+
+import Routes
+
+startApp :: IO ()
+startApp = do
+  dbURL <- getEnv "DATABASE_URL"
+  let ci = fromJust $ parseDatabaseURL dbURL
+  let cs = postgreSQLConnectionString ci
+  let dbConnectionString = unpack cs
+  pool <- createPostgresqlPool dbConnectionString 5
+
+  runDbConn $ do
+    runMigration defaultMigrationLogger $ do
+      migrate (undefined :: Models.App)
+      migrate (undefined :: Models.Endpoint)
+      migrate (undefined :: Models.Event)
+
+  run 8080 $ app pool
+
+app :: Pool Postgresql -> Application
+app pool = serve api $ server pool

src/Models.hs

@@ -0,0 +1,52 @@
+{-# LANGUAGE DuplicateRecordFields      #-}
+{-# LANGUAGE EmptyDataDecls             #-}
+{-# LANGUAGE FlexibleContexts           #-}
+{-# LANGUAGE FlexibleInstances          #-}
+{-# LANGUAGE GADTs                      #-}
+{-# LANGUAGE GeneralizedNewtypeDeriving #-}
+{-# LANGUAGE MultiParamTypeClasses      #-}
+{-# LANGUAGE OverloadedStrings          #-}
+{-# LANGUAGE QuasiQuotes                #-}
+{-# LANGUAGE StandaloneDeriving         #-}
+{-# LANGUAGE TemplateHaskell            #-}
+{-# LANGUAGE TypeFamilies               #-}
+module Models where
+
+import Database.Groundhog (DefaultKey)
+import Database.Groundhog.TH
+import Data.Text
+
+data App = App
+         { herokuId    :: Text
+         , region      :: Text
+         }
+
+deriving instance Eq App
+deriving instance Read App
+deriving instance Show App
+
+data Endpoint = Endpoint
+              { endpointApp  :: DefaultKey App
+              , link         :: Text
+              }
+
+deriving instance Eq Endpoint
+deriving instance Read Endpoint
+deriving instance Show Endpoint
+
+data Event = Event
+           { eventEndpoint :: DefaultKey Endpoint
+           , eventApp      :: DefaultKey App
+           , ok            :: Bool
+           , reason        :: Text
+           }
+
+deriving instance Eq Event
+deriving instance Show Event
+deriving instance Read Event
+
+mkPersist defaultCodegenConfig [groundhog|
+- entity: App
+- entity: Endpoint
+- entity: Event
+|]

src/Routes.lhs

@@ -0,0 +1 @@
+Routes.md

src/Routes.md

@@ -0,0 +1,56 @@
+Routes
+======
+
+The [addon partner API][addon-partner-api] defines the routes this application
+must support.
+
+Module Header
+-------------
+
+```haskell
+{-# LANGUAGE DataKinds       #-}
+{-# LANGUAGE TemplateHaskell #-}
+{-# LANGUAGE TypeOperators   #-}
+
+module Routes where
+
+-- external dependencies
+import Data.Proxy
+import Network.Wai
+import Network.Wai.Handler.Warp
+import Servant
+
+-- internal dependencies
+import Heroku.Types as Heroku
+import qualified Models
+import qualified Types
+```
+
+URL Routing
+-----------
+
+```haskell
+type Api = "heroku" :> "resources" :> ReqBody '[JSON] Heroku.Provider :> Post '[JSON] Types.App
+
+api :: Proxy Api
+api = Proxy
+```
+
+```
+server :: Pool Postgresql -> Server Api
+server pool =
+    provisionAppH
+
+    where
+        provisionAppH settings = liftIO $ provisionApp settings
+
+        provisionApp :: Heroku.Provider -> IO Types.App
+        provisionApp settings = runDbConn pool $ do
+            appKey <- insert $ Models.App (Heroku.heroku_id settings) (Heroku.region settings)
+            let showKey = show appKey
+
+            Types.App showKey
+```
+
+---
+[addon-partner-api]: https://devcenter.heroku.com/articles/add-on-partner-api

src/Types.lhs

@@ -0,0 +1 @@
+Types.md

src/Types.md

@@ -0,0 +1,23 @@
+```haskell
+{-# LANGUAGE DeriveGeneric #-}
+
+module Types where
+
+import Data.Aeson
+import GHC.Generics
+import Prelude hiding (id)
+```
+
+App
+---
+
+1:1 with a Heroku app.
+
+```haskell
+data App = App
+         { id :: String
+         } deriving (Generic, Eq, Show, Read)
+
+instance ToJSON App
+instance FromJSON App
+```

stack.yaml

@@ -0,0 +1,67 @@
+# 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:
+# http://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
+# resolver: ghcjs-0.1.0_ghc-7.10.2
+# resolver:
+#  name: custom-snapshot
+#  location: "./custom-snapshot.yaml"
+resolver: lts-8.12
+
+# 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
+#   extra-dep: true
+#  subdirs:
+#  - auto-update
+#  - wai
+#
+# A package marked 'extra-dep: true' will only be built if demanded by a
+# non-dependency (i.e. a user package), and its test suites and benchmarks
+# will not be run. This is useful for tweaking upstream packages.
+packages:
+- '.'
+# Dependency packages to be pulled from upstream that are not in the resolver
+# (e.g., acme-missiles-0.3)
+extra-deps:
+  - heroku-0.1.2.3
+
+# 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: ">=1.3"
+#
+# 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

@@ -0,0 +1,20 @@
+{-# LANGUAGE QuasiQuotes #-}
+{-# LANGUAGE OverloadedStrings #-}
+module Main (main) where
+
+import Lib (app)
+import Test.Hspec
+import Test.Hspec.Wai
+import Test.Hspec.Wai.JSON
+
+main :: IO ()
+main = hspec spec
+
+spec :: Spec
+spec = with (return app) $ do
+    describe "GET /users" $ do
+        it "responds with 200" $ do
+            get "/users" `shouldRespondWith` 200
+        it "responds with [User]" $ do
+            let users = "[{\"userId\":1,\"userFirstName\":\"Isaac\",\"userLastName\":\"Newton\"},{\"userId\":2,\"userFirstName\":\"Albert\",\"userLastName\":\"Einstein\"}]"
+            get "/users" `shouldRespondWith` users