Add initial servant API implementation

Setup.hs

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+import Distribution.Simple
+main = defaultMain

app/Main.hs

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+module Main where
+
+import Lib
+
+main :: IO ()
+main = startApp

package.yaml

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+name:                tutor
+version:             0.1.0.0
+github:              "githubuser/tutor"
+license:             BSD3
+author:              "Author name here"
+maintainer:          "example@example.com"
+copyright:           "2022 Author name here"
+
+extra-source-files:
+- README.org
+
+# 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/tutor#readme>
+
+dependencies:
+- base >= 4.7 && < 5
+- aeson
+- servant-server
+- wai
+- warp
+
+library:
+  source-dirs: src
+
+executables:
+  tutor-exe:
+    main:                Main.hs
+    source-dirs:         app
+    ghc-options:
+    - -threaded
+    - -rtsopts
+    - -with-rtsopts=-N
+    dependencies:
+    - base
+    - tutor
+
+tests:
+  tutor-test:
+    main:                Spec.hs
+    source-dirs:         test
+    ghc-options:
+    - -threaded
+    - -rtsopts
+    - -with-rtsopts=-N
+    dependencies:
+    - base
+    - tutor
+    - hspec
+    - hspec-wai
+    - hspec-wai-json
+    - aeson

src/Lib.hs

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+{-# LANGUAGE DataKinds #-}
+{-# LANGUAGE TemplateHaskell #-}
+{-# LANGUAGE TypeOperators #-}
+
+module Lib
+  ( startApp,
+    app,
+  )
+where
+
+import Data.Aeson
+import Data.Aeson.TH
+import Network.Wai
+import Network.Wai.Handler.Warp
+import Servant
+
+data Prices = Prices
+  { usd :: Maybe String,
+    usd_foil :: Maybe String,
+    eur :: Maybe String,
+    eur_foil :: Maybe String,
+    tix :: Maybe String
+  }
+  deriving (Eq, Show)
+
+$(deriveJSON defaultOptions ''Prices)
+
+data Card = Card
+  { scryfall_id :: String,
+    name :: String,
+    set_code :: String,
+    collector_number :: String,
+    rarity :: String,
+    color_identity :: String,
+    oracle_text :: Maybe String,
+    prices :: Prices
+  }
+  deriving (Eq, Show)
+
+$(deriveJSON defaultOptions ''Card)
+
+type API =
+  "search" :> Get '[JSON] [Card]
+    :<|> Raw
+
+startApp :: IO ()
+startApp = run 8080 app
+
+app :: Application
+app = serve api server
+
+api :: Proxy API
+api = Proxy
+
+server :: Server API
+server =
+  return cards
+    :<|> serveDirectoryFileServer "www/public"
+
+cards :: [Card]
+cards =
+  [ Card
+      { scryfall_id = "f6cd7465-9dd0-473c-ac5e-dd9e2f22f5f6",
+        name = "Esika, God of the Tree // The Prismatic Bridge",
+        set_code = "KHM",
+        collector_number = "168",
+        rarity = "mythic",
+        color_identity = "WUBGR",
+        oracle_text = Nothing,
+        prices =
+          Prices
+            { usd = Just "9.07",
+              usd_foil = Just "10.77",
+              eur = Just "7.79",
+              eur_foil = Just "12.27",
+              tix = Just "1.08"
+            }
+      },
+    Card
+      { scryfall_id = "d761ff73-0717-4ee4-996b-f5547bcf9b2f",
+        name = "Go-Shintai of Life's Origin",
+        set_code = "NEC",
+        collector_number = "66",
+        rarity = "mythic",
+        color_identity = "WUBGR",
+        oracle_text = Just "{W}{U}{B}{R}{G}, {T}: Return target enchantment card from your graveyard to the battlefield.\nWhenever Go-Shintai of Life's Origin or another nontoken Shrine enters the battlefield under your control, create a 1/1 colorless Shrine enchantment creature token.",
+        prices =
+          Prices
+            { usd = Just "23.28",
+              usd_foil = Nothing,
+              eur = Just "23.05",
+              eur_foil = Nothing,
+              tix = Nothing
+            }
+      },
+    Card
+      { scryfall_id = "e2539ff7-2b7d-47e3-bd77-3138a6c42d2b",
+        name = "Godsire",
+        set_code = "ALA",
+        collector_number = "170",
+        rarity = "mythic",
+        color_identity = "WGR",
+        oracle_text = Just "Vigilance\n{T}: Create an 8/8 Beast creature token that's red, green, and white.",
+        prices =
+          Prices
+            { usd = Just "7.22",
+              usd_foil = Just "16.56",
+              eur = Just "4.00",
+              eur_foil = Just "13.95",
+              tix = Just "0.02"
+            }
+      }
+  ]

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:
+  url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/18/28.yaml
+
+# 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
+#   subdirs:
+#   - auto-update
+#   - wai
+packages:
+- .
+# Dependency packages to be pulled from upstream that are not in the resolver.
+# These entries can reference officially published versions as well as
+# forks / in-progress versions pinned to a git hash. For example:
+#
+# extra-deps:
+# - acme-missiles-0.3
+# - git: https://github.com/commercialhaskell/stack.git
+#   commit: e7b331f14bcffb8367cd58fbfc8b40ec7642100a
+#
+# 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: ">=2.7"
+#
+# 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

stack.yaml.lock

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+# This file was autogenerated by Stack.
+# You should not edit this file by hand.
+# For more information, please see the documentation at:
+#   https://docs.haskellstack.org/en/stable/lock_files
+
+packages: []
+snapshots:
+- completed:
+    size: 590100
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/18/28.yaml
+    sha256: 428ec8d5ce932190d3cbe266b9eb3c175cd81e984babf876b64019e2cbe4ea68
+  original:
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/18/28.yaml

test/Spec.hs

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+{-# 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 /search" $ do
+        it "responds with 200" $ do
+            get "/search" `shouldRespondWith` 200
+        it "responds with [Card]" $ do
+            let cards = "[{\"scryfall_id\":\"f6cd7465-9dd0-473c-ac5e-dd9e2f22f5f6\",\"name\":\"Esika, God of the Tree // The Prismatic Bridge\",\"set_code\":\"KHM\",\"collector_number\":\"168\",\"rarity\":\"mythic\",\"color_identity\":\"WUBGR\",\"oracle_text\":null,\"prices\":{\"usd\":\"9.07\",\"usd_foil\":\"10.77\",\"eur\":\"7.79\",\"eur_foil\":\"12.27\",\"tix\":\"1.08\"}},{\"scryfall_id\":\"d761ff73-0717-4ee4-996b-f5547bcf9b2f\",\"name\":\"Go-Shintai of Life's Origin\",\"set_code\":\"NEC\",\"collector_number\":\"66\",\"rarity\":\"mythic\",\"color_identity\":\"WUBGR\",\"oracle_text\":\"{W}{U}{B}{R}{G}, {T}: Return target enchantment card from your graveyard to the battlefield.\\nWhenever Go-Shintai of Life's Origin or another nontoken Shrine enters the battlefield under your control, create a 1/1 colorless Shrine enchantment creature token.\",\"prices\":{\"usd\":\"23.28\",\"usd_foil\":null,\"eur\":\"23.05\",\"eur_foil\":null,\"tix\":null}},{\"scryfall_id\":\"e2539ff7-2b7d-47e3-bd77-3138a6c42d2b\",\"name\":\"Godsire\",\"set_code\":\"ALA\",\"collector_number\":\"170\",\"rarity\":\"mythic\",\"color_identity\":\"WGR\",\"oracle_text\":\"Vigilance\\n{T}: Create an 8/8 Beast creature token that's red, green, and white.\",\"prices\":{\"usd\":\"7.22\",\"usd_foil\":\"16.56\",\"eur\":\"4.00\",\"eur_foil\":\"13.95\",\"tix\":\"0.02\"}}]"
+            get "/search" `shouldRespondWith` cards

tutor.cabal

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+cabal-version: 1.12
+
+-- This file has been generated from package.yaml by hpack version 0.34.4.
+--
+-- see: https://github.com/sol/hpack
+
+name:           tutor
+version:        0.1.0.0
+description:    Please see the README on GitHub at <https://github.com/githubuser/tutor#readme>
+homepage:       https://github.com/githubuser/tutor#readme
+bug-reports:    https://github.com/githubuser/tutor/issues
+author:         Author name here
+maintainer:     example@example.com
+copyright:      2022 Author name here
+license:        BSD3
+build-type:     Simple
+extra-source-files:
+    README.org
+
+source-repository head
+  type: git
+  location: https://github.com/githubuser/tutor
+
+library
+  exposed-modules:
+      Lib
+  other-modules:
+      Paths_tutor
+  hs-source-dirs:
+      src
+  build-depends:
+      aeson
+    , base >=4.7 && <5
+    , servant-server
+    , wai
+    , warp
+  default-language: Haskell2010
+
+executable tutor-exe
+  main-is: Main.hs
+  other-modules:
+      Paths_tutor
+  hs-source-dirs:
+      app
+  ghc-options: -threaded -rtsopts -with-rtsopts=-N
+  build-depends:
+      aeson
+    , base
+    , servant-server
+    , tutor
+    , wai
+    , warp
+  default-language: Haskell2010
+
+test-suite tutor-test
+  type: exitcode-stdio-1.0
+  main-is: Spec.hs
+  other-modules:
+      Paths_tutor
+  hs-source-dirs:
+      test
+  ghc-options: -threaded -rtsopts -with-rtsopts=-N
+  build-depends:
+      aeson
+    , base
+    , hspec
+    , hspec-wai
+    , hspec-wai-json
+    , servant-server
+    , tutor
+    , wai
+    , warp
+  default-language: Haskell2010