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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE DeriveDataTypeable #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-# LANGUAGE OverloadedStrings #-}</span>
<a name="line-3"></a><span class='hs-comment'>{-# LANGUAGE PatternGuards #-}</span>
<a name="line-4"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Yesod</span><span class='hs-varop'>.</span><span class='hs-conid'>Default</span><span class='hs-varop'>.</span><span class='hs-conid'>Config</span>
<a name="line-5"></a> <span class='hs-layout'>(</span> <span class='hs-conid'>DefaultEnv</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-6"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>fromArgs</span>
<a name="line-7"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>loadDevelopmentConfig</span>
<a name="line-8"></a>
<a name="line-9"></a> <span class='hs-comment'>-- reexport</span>
<a name="line-10"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>AppConfig</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-11"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>ConfigSettings</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-12"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>configSettings</span>
<a name="line-13"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>loadConfig</span>
<a name="line-14"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>withYamlEnvironment</span>
<a name="line-15"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-16"></a>
<a name="line-17"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Char</span> <span class='hs-layout'>(</span><span class='hs-varid'>toUpper</span><span class='hs-layout'>,</span> <span class='hs-varid'>toLower</span><span class='hs-layout'>)</span>
<a name="line-18"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span> <span class='hs-layout'>(</span><span class='hs-conid'>Text</span><span class='hs-layout'>)</span>
<a name="line-19"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>T</span>
<a name="line-20"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Yaml</span>
<a name="line-21"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromMaybe</span><span class='hs-layout'>)</span>
<a name="line-22"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>HashMap</span><span class='hs-varop'>.</span><span class='hs-conid'>Strict</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>M</span>
<a name="line-23"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Environment</span> <span class='hs-layout'>(</span><span class='hs-varid'>getArgs</span><span class='hs-layout'>,</span> <span class='hs-varid'>getProgName</span><span class='hs-layout'>,</span> <span class='hs-varid'>getEnvironment</span><span class='hs-layout'>)</span>
<a name="line-24"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Exit</span> <span class='hs-layout'>(</span><span class='hs-varid'>exitFailure</span><span class='hs-layout'>)</span>
<a name="line-25"></a>
<a name="line-26"></a><a name="DefaultEnv"></a><span class='hs-comment'>-- | A yesod-provided @'AppEnv'@, allows for Development, Testing, and</span>
<a name="line-27"></a><a name="DefaultEnv"></a><span class='hs-comment'>-- Production environments</span>
<a name="line-28"></a><a name="DefaultEnv"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>DefaultEnv</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Development</span>
<a name="line-29"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Testing</span>
<a name="line-30"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Staging</span>
<a name="line-31"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Production</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Read</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span><span class='hs-layout'>,</span> <span class='hs-conid'>Enum</span><span class='hs-layout'>,</span> <span class='hs-conid'>Bounded</span><span class='hs-layout'>)</span>
<a name="line-32"></a>
<a name="line-33"></a><a name="ArgConfig"></a><span class='hs-comment'>-- | Setup commandline arguments for environment and port</span>
<a name="line-34"></a><a name="ArgConfig"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>ArgConfig</span> <span class='hs-varid'>env</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ArgConfig</span>
<a name="line-35"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>environment</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>env</span>
<a name="line-36"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>port</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span>
<a name="line-37"></a> <span class='hs-layout'>}</span> <span class='hs-keyword'>deriving</span> <span class='hs-conid'>Show</span>
<a name="line-38"></a>
<a name="line-39"></a><a name="parseArgConfig"></a><span class='hs-definition'>parseArgConfig</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span> <span class='hs-varid'>env</span><span class='hs-layout'>,</span> <span class='hs-conid'>Read</span> <span class='hs-varid'>env</span><span class='hs-layout'>,</span> <span class='hs-conid'>Enum</span> <span class='hs-varid'>env</span><span class='hs-layout'>,</span> <span class='hs-conid'>Bounded</span> <span class='hs-varid'>env</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>ArgConfig</span> <span class='hs-varid'>env</span><span class='hs-layout'>)</span>
<a name="line-40"></a><span class='hs-definition'>parseArgConfig</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-41"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>envs</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>minBound</span><span class='hs-keyglyph'>..</span><span class='hs-varid'>maxBound</span><span class='hs-keyglyph'>]</span>
<a name="line-42"></a> <span class='hs-varid'>args</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getArgs</span>
<a name="line-43"></a> <span class='hs-layout'>(</span><span class='hs-varid'>portS</span><span class='hs-layout'>,</span> <span class='hs-varid'>args'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getPort</span> <span class='hs-varid'>id</span> <span class='hs-varid'>args</span>
<a name="line-44"></a> <span class='hs-varid'>portI</span> <span class='hs-keyglyph'><-</span>
<a name="line-45"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>reads</span> <span class='hs-varid'>portS</span> <span class='hs-keyword'>of</span>
<a name="line-46"></a> <span class='hs-layout'>(</span><span class='hs-varid'>i</span><span class='hs-layout'>,</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varid'>i</span>
<a name="line-47"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>error</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Invalid port value: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>portS</span>
<a name="line-48"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>args'</span> <span class='hs-keyword'>of</span>
<a name="line-49"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>e</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-50"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>reads</span> <span class='hs-varop'>$</span> <span class='hs-varid'>capitalize</span> <span class='hs-varid'>e</span> <span class='hs-keyword'>of</span>
<a name="line-51"></a> <span class='hs-layout'>(</span><span class='hs-varid'>e'</span><span class='hs-layout'>,</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>ArgConfig</span> <span class='hs-varid'>e'</span> <span class='hs-varid'>portI</span>
<a name="line-52"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-53"></a> <span class='hs-conid'>()</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>error</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Invalid environment, valid entries are: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>envs</span>
<a name="line-54"></a> <span class='hs-comment'>-- next line just provided to force the type of envs</span>
<a name="line-55"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>ArgConfig</span> <span class='hs-layout'>(</span><span class='hs-varid'>head</span> <span class='hs-varid'>envs</span><span class='hs-layout'>)</span> <span class='hs-num'>0</span>
<a name="line-56"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-57"></a> <span class='hs-varid'>pn</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getProgName</span>
<a name="line-58"></a> <span class='hs-varid'>putStrLn</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Usage: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>pn</span> <span class='hs-varop'>++</span> <span class='hs-str'>" <environment> [--port <port>]"</span>
<a name="line-59"></a> <span class='hs-varid'>putStrLn</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Valid environments: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>envs</span>
<a name="line-60"></a> <span class='hs-varid'>exitFailure</span>
<a name="line-61"></a> <span class='hs-keyword'>where</span>
<a name="line-62"></a> <span class='hs-varid'>getPort</span> <span class='hs-varid'>front</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-63"></a> <span class='hs-varid'>env</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getEnvironment</span>
<a name="line-64"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromMaybe</span> <span class='hs-str'>"0"</span> <span class='hs-varop'>$</span> <span class='hs-varid'>lookup</span> <span class='hs-str'>"PORT"</span> <span class='hs-varid'>env</span><span class='hs-layout'>,</span> <span class='hs-varid'>front</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span>
<a name="line-65"></a> <span class='hs-varid'>getPort</span> <span class='hs-varid'>front</span> <span class='hs-layout'>(</span><span class='hs-str'>"--port"</span><span class='hs-conop'>:</span><span class='hs-varid'>p</span><span class='hs-conop'>:</span><span class='hs-varid'>rest</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span><span class='hs-layout'>,</span> <span class='hs-varid'>front</span> <span class='hs-varid'>rest</span><span class='hs-layout'>)</span>
<a name="line-66"></a> <span class='hs-varid'>getPort</span> <span class='hs-varid'>front</span> <span class='hs-layout'>(</span><span class='hs-str'>"-p"</span><span class='hs-conop'>:</span><span class='hs-varid'>p</span><span class='hs-conop'>:</span><span class='hs-varid'>rest</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span><span class='hs-layout'>,</span> <span class='hs-varid'>front</span> <span class='hs-varid'>rest</span><span class='hs-layout'>)</span>
<a name="line-67"></a> <span class='hs-varid'>getPort</span> <span class='hs-varid'>front</span> <span class='hs-layout'>(</span><span class='hs-varid'>arg</span><span class='hs-conop'>:</span><span class='hs-varid'>rest</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>getPort</span> <span class='hs-layout'>(</span><span class='hs-varid'>front</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-varid'>arg</span><span class='hs-conop'>:</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>rest</span>
<a name="line-68"></a>
<a name="line-69"></a> <span class='hs-varid'>capitalize</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-70"></a> <span class='hs-varid'>capitalize</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toUpper</span> <span class='hs-varid'>x</span> <span class='hs-conop'>:</span> <span class='hs-varid'>map</span> <span class='hs-varid'>toLower</span> <span class='hs-varid'>xs</span>
<a name="line-71"></a>
<a name="line-72"></a><a name="fromArgs"></a><span class='hs-comment'>-- | Load the app config from command line parameters</span>
<a name="line-73"></a><span class='hs-definition'>fromArgs</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Read</span> <span class='hs-varid'>env</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span> <span class='hs-varid'>env</span><span class='hs-layout'>,</span> <span class='hs-conid'>Enum</span> <span class='hs-varid'>env</span><span class='hs-layout'>,</span> <span class='hs-conid'>Bounded</span> <span class='hs-varid'>env</span><span class='hs-layout'>)</span>
<a name="line-74"></a> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-varid'>env</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Object</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Parser</span> <span class='hs-varid'>extra</span><span class='hs-layout'>)</span>
<a name="line-75"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>AppConfig</span> <span class='hs-varid'>env</span> <span class='hs-varid'>extra</span><span class='hs-layout'>)</span>
<a name="line-76"></a><span class='hs-definition'>fromArgs</span> <span class='hs-varid'>getExtra</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-77"></a> <span class='hs-varid'>args</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>parseArgConfig</span>
<a name="line-78"></a>
<a name="line-79"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>env</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>environment</span> <span class='hs-varid'>args</span>
<a name="line-80"></a>
<a name="line-81"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>cs</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>configSettings</span> <span class='hs-varid'>env</span><span class='hs-layout'>)</span>
<a name="line-82"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>csParseExtra</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>getExtra</span>
<a name="line-83"></a> <span class='hs-layout'>}</span>
<a name="line-84"></a> <span class='hs-varid'>config</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>loadConfig</span> <span class='hs-varid'>cs</span>
<a name="line-85"></a>
<a name="line-86"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>port</span> <span class='hs-varid'>args</span> <span class='hs-varop'>/=</span> <span class='hs-num'>0</span>
<a name="line-87"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>config</span> <span class='hs-layout'>{</span> <span class='hs-varid'>appPort</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>port</span> <span class='hs-varid'>args</span> <span class='hs-layout'>}</span>
<a name="line-88"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>config</span>
<a name="line-89"></a>
<a name="line-90"></a><a name="loadDevelopmentConfig"></a><span class='hs-comment'>-- | Load your development config (when using @'DefaultEnv'@)</span>
<a name="line-91"></a><span class='hs-definition'>loadDevelopmentConfig</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>AppConfig</span> <span class='hs-conid'>DefaultEnv</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span>
<a name="line-92"></a><span class='hs-definition'>loadDevelopmentConfig</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>loadConfig</span> <span class='hs-varop'>$</span> <span class='hs-varid'>configSettings</span> <span class='hs-conid'>Development</span>
<a name="line-93"></a>
<a name="line-94"></a><a name="AppConfig"></a><span class='hs-comment'>-- | Dynamic per-environment configuration which can be loaded at</span>
<a name="line-95"></a><a name="AppConfig"></a><span class='hs-comment'>-- run-time negating the need to recompile between environments.</span>
<a name="line-96"></a><a name="AppConfig"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>AppConfig</span> <span class='hs-varid'>environment</span> <span class='hs-varid'>extra</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>AppConfig</span>
<a name="line-97"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>appEnv</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>environment</span>
<a name="line-98"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>appPort</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span>
<a name="line-99"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>appRoot</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span>
<a name="line-100"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>appExtra</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>extra</span>
<a name="line-101"></a> <span class='hs-layout'>}</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span><span class='hs-layout'>)</span>
<a name="line-102"></a>
<a name="line-103"></a><a name="ConfigSettings"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>ConfigSettings</span> <span class='hs-varid'>environment</span> <span class='hs-varid'>extra</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ConfigSettings</span>
<a name="line-104"></a> <span class='hs-layout'>{</span>
<a name="line-105"></a> <span class='hs-comment'>-- | An arbitrary value, used below, to indicate the current running</span>
<a name="line-106"></a> <span class='hs-comment'>-- environment. Usually, you will use 'DefaultEnv' for this type.</span>
<a name="line-107"></a> <span class='hs-varid'>csEnv</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>environment</span>
<a name="line-108"></a> <span class='hs-comment'>-- | Load any extra data, to be used by the application.</span>
<a name="line-109"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>csParseExtra</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>environment</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Object</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Parser</span> <span class='hs-varid'>extra</span>
<a name="line-110"></a> <span class='hs-comment'>-- | Return the path to the YAML config file.</span>
<a name="line-111"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>csFile</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>environment</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>FilePath</span>
<a name="line-112"></a> <span class='hs-comment'>-- | Get the sub-object (if relevant) from the given YAML source which</span>
<a name="line-113"></a> <span class='hs-comment'>-- contains the specific settings for the current environment.</span>
<a name="line-114"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>csGetObject</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>environment</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Value</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Value</span>
<a name="line-115"></a> <span class='hs-layout'>}</span>
<a name="line-116"></a>
<a name="line-117"></a><a name="configSettings"></a><span class='hs-comment'>-- | Default config settings.</span>
<a name="line-118"></a><span class='hs-definition'>configSettings</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Show</span> <span class='hs-varid'>env</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>env</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ConfigSettings</span> <span class='hs-varid'>env</span> <span class='hs-conid'>()</span>
<a name="line-119"></a><span class='hs-definition'>configSettings</span> <span class='hs-varid'>env0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ConfigSettings</span>
<a name="line-120"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>csEnv</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>env0</span>
<a name="line-121"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>csParseExtra</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-122"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>csFile</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-str'>"config/settings.yml"</span>
<a name="line-123"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>csGetObject</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>env</span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-124"></a> <span class='hs-varid'>envs</span> <span class='hs-keyglyph'><-</span>
<a name="line-125"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>v</span> <span class='hs-keyword'>of</span>
<a name="line-126"></a> <span class='hs-conid'>Object</span> <span class='hs-varid'>obj</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varid'>obj</span>
<a name="line-127"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fail</span> <span class='hs-str'>"Expected Object"</span>
<a name="line-128"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>senv</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>show</span> <span class='hs-varid'>env</span>
<a name="line-129"></a> <span class='hs-varid'>tenv</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>pack</span> <span class='hs-varid'>senv</span>
<a name="line-130"></a> <span class='hs-varid'>maybe</span>
<a name="line-131"></a> <span class='hs-layout'>(</span><span class='hs-varid'>error</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Could not find environment: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>senv</span><span class='hs-layout'>)</span>
<a name="line-132"></a> <span class='hs-varid'>return</span>
<a name="line-133"></a> <span class='hs-layout'>(</span><span class='hs-conid'>M</span><span class='hs-varop'>.</span><span class='hs-varid'>lookup</span> <span class='hs-varid'>tenv</span> <span class='hs-varid'>envs</span><span class='hs-layout'>)</span>
<a name="line-134"></a> <span class='hs-layout'>}</span>
<a name="line-135"></a>
<a name="line-136"></a><a name="loadConfig"></a><span class='hs-comment'>-- | Load an @'AppConfig'@.</span>
<a name="line-137"></a><span class='hs-comment'>--</span>
<a name="line-138"></a><span class='hs-comment'>-- Some examples:</span>
<a name="line-139"></a><span class='hs-comment'>--</span>
<a name="line-140"></a><span class='hs-comment'>-- > -- typical local development</span>
<a name="line-141"></a><span class='hs-comment'>-- > Development:</span>
<a name="line-142"></a><span class='hs-comment'>-- > host: localhost</span>
<a name="line-143"></a><span class='hs-comment'>-- > port: 3000</span>
<a name="line-144"></a><span class='hs-comment'>-- ></span>
<a name="line-145"></a><span class='hs-comment'>-- > -- ssl: will default false</span>
<a name="line-146"></a><span class='hs-comment'>-- > -- approot: will default to "<a href="http://localhost:3000">http://localhost:3000</a>"</span>
<a name="line-147"></a><span class='hs-comment'>--</span>
<a name="line-148"></a><span class='hs-comment'>-- > -- typical outward-facing production box</span>
<a name="line-149"></a><span class='hs-comment'>-- > Production:</span>
<a name="line-150"></a><span class='hs-comment'>-- > host: www.example.com</span>
<a name="line-151"></a><span class='hs-comment'>-- ></span>
<a name="line-152"></a><span class='hs-comment'>-- > -- ssl: will default false</span>
<a name="line-153"></a><span class='hs-comment'>-- > -- port: will default 80</span>
<a name="line-154"></a><span class='hs-comment'>-- > -- approot: will default "<a href="http://www.example.com">http://www.example.com</a>"</span>
<a name="line-155"></a><span class='hs-comment'>--</span>
<a name="line-156"></a><span class='hs-comment'>-- > -- maybe you're reverse proxying connections to the running app</span>
<a name="line-157"></a><span class='hs-comment'>-- > -- on some other port</span>
<a name="line-158"></a><span class='hs-comment'>-- > Production:</span>
<a name="line-159"></a><span class='hs-comment'>-- > port: 8080</span>
<a name="line-160"></a><span class='hs-comment'>-- > approot: "<a href="http://example.com">http://example.com</a>"</span>
<a name="line-161"></a><span class='hs-comment'>-- ></span>
<a name="line-162"></a><span class='hs-comment'>-- > -- approot is specified so that the non-80 port is not appended</span>
<a name="line-163"></a><span class='hs-comment'>-- > -- automatically.</span>
<a name="line-164"></a><span class='hs-comment'>--</span>
<a name="line-165"></a><span class='hs-definition'>loadConfig</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ConfigSettings</span> <span class='hs-varid'>environment</span> <span class='hs-varid'>extra</span>
<a name="line-166"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>AppConfig</span> <span class='hs-varid'>environment</span> <span class='hs-varid'>extra</span><span class='hs-layout'>)</span>
<a name="line-167"></a><span class='hs-definition'>loadConfig</span> <span class='hs-layout'>(</span><span class='hs-conid'>ConfigSettings</span> <span class='hs-varid'>env</span> <span class='hs-varid'>parseExtra</span> <span class='hs-varid'>getFile</span> <span class='hs-varid'>getObject</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-168"></a> <span class='hs-varid'>fp</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getFile</span> <span class='hs-varid'>env</span>
<a name="line-169"></a> <span class='hs-varid'>mtopObj</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>decodeFile</span> <span class='hs-varid'>fp</span>
<a name="line-170"></a> <span class='hs-varid'>topObj</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>fail</span> <span class='hs-str'>"Invalid YAML file"</span><span class='hs-layout'>)</span> <span class='hs-varid'>return</span> <span class='hs-varid'>mtopObj</span>
<a name="line-171"></a> <span class='hs-varid'>obj</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getObject</span> <span class='hs-varid'>env</span> <span class='hs-varid'>topObj</span>
<a name="line-172"></a> <span class='hs-varid'>m</span> <span class='hs-keyglyph'><-</span>
<a name="line-173"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>obj</span> <span class='hs-keyword'>of</span>
<a name="line-174"></a> <span class='hs-conid'>Object</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varid'>m</span>
<a name="line-175"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fail</span> <span class='hs-str'>"Expected map"</span>
<a name="line-176"></a>
<a name="line-177"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>mssl</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>lookupScalar</span> <span class='hs-str'>"ssl"</span> <span class='hs-varid'>m</span>
<a name="line-178"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>mhost</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>lookupScalar</span> <span class='hs-str'>"host"</span> <span class='hs-varid'>m</span>
<a name="line-179"></a> <span class='hs-varid'>mport</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>parseMonad</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>x</span> <span class='hs-varop'>.:</span> <span class='hs-str'>"port"</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span>
<a name="line-180"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>mapproot</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>lookupScalar</span> <span class='hs-str'>"approot"</span> <span class='hs-varid'>m</span>
<a name="line-181"></a>
<a name="line-182"></a> <span class='hs-varid'>extra</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>parseMonad</span> <span class='hs-layout'>(</span><span class='hs-varid'>parseExtra</span> <span class='hs-varid'>env</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span>
<a name="line-183"></a>
<a name="line-184"></a> <span class='hs-comment'>-- set some default arguments</span>
<a name="line-185"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>ssl</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>maybe</span> <span class='hs-conid'>False</span> <span class='hs-varid'>toBool</span> <span class='hs-varid'>mssl</span>
<a name="line-186"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>port'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromMaybe</span> <span class='hs-layout'>(</span><span class='hs-keyword'>if</span> <span class='hs-varid'>ssl</span> <span class='hs-keyword'>then</span> <span class='hs-num'>443</span> <span class='hs-keyword'>else</span> <span class='hs-num'>80</span><span class='hs-layout'>)</span> <span class='hs-varid'>mport</span>
<a name="line-187"></a>
<a name="line-188"></a> <span class='hs-varid'>approot</span> <span class='hs-keyglyph'><-</span> <span class='hs-keyword'>case</span> <span class='hs-layout'>(</span><span class='hs-varid'>mhost</span><span class='hs-layout'>,</span> <span class='hs-varid'>mapproot</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-189"></a> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span> <span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>ar</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varid'>ar</span>
<a name="line-190"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>host</span><span class='hs-layout'>,</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>concat</span>
<a name="line-191"></a> <span class='hs-keyglyph'>[</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>ssl</span> <span class='hs-keyword'>then</span> <span class='hs-str'>"https://"</span> <span class='hs-keyword'>else</span> <span class='hs-str'>"http://"</span>
<a name="line-192"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>host</span>
<a name="line-193"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>addPort</span> <span class='hs-varid'>ssl</span> <span class='hs-varid'>port'</span>
<a name="line-194"></a> <span class='hs-keyglyph'>]</span>
<a name="line-195"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fail</span> <span class='hs-str'>"You must supply either a host or approot"</span>
<a name="line-196"></a>
<a name="line-197"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>AppConfig</span>
<a name="line-198"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>appEnv</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>env</span>
<a name="line-199"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>appPort</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>port'</span>
<a name="line-200"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>appRoot</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>approot</span>
<a name="line-201"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>appExtra</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>extra</span>
<a name="line-202"></a> <span class='hs-layout'>}</span>
<a name="line-203"></a>
<a name="line-204"></a> <span class='hs-keyword'>where</span>
<a name="line-205"></a> <span class='hs-varid'>lookupScalar</span> <span class='hs-varid'>k</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span>
<a name="line-206"></a> <span class='hs-keyword'>case</span> <span class='hs-conid'>M</span><span class='hs-varop'>.</span><span class='hs-varid'>lookup</span> <span class='hs-varid'>k</span> <span class='hs-varid'>m</span> <span class='hs-keyword'>of</span>
<a name="line-207"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>String</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varid'>t</span>
<a name="line-208"></a> <span class='hs-conid'>Just</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fail</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Invalid value for: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>k</span>
<a name="line-209"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fail</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Not found: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>k</span>
<a name="line-210"></a> <span class='hs-varid'>toBool</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-211"></a> <span class='hs-varid'>toBool</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varop'>`elem`</span> <span class='hs-keyglyph'>[</span><span class='hs-str'>"true"</span><span class='hs-layout'>,</span> <span class='hs-str'>"TRUE"</span><span class='hs-layout'>,</span> <span class='hs-str'>"yes"</span><span class='hs-layout'>,</span> <span class='hs-str'>"YES"</span><span class='hs-layout'>,</span> <span class='hs-str'>"Y"</span><span class='hs-layout'>,</span> <span class='hs-str'>"1"</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-212"></a>
<a name="line-213"></a> <span class='hs-varid'>addPort</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-214"></a> <span class='hs-varid'>addPort</span> <span class='hs-conid'>True</span> <span class='hs-num'>443</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>""</span>
<a name="line-215"></a> <span class='hs-varid'>addPort</span> <span class='hs-conid'>False</span> <span class='hs-num'>80</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>""</span>
<a name="line-216"></a> <span class='hs-varid'>addPort</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>pack</span> <span class='hs-varop'>$</span> <span class='hs-chr'>':'</span> <span class='hs-conop'>:</span> <span class='hs-varid'>show</span> <span class='hs-varid'>p</span>
<a name="line-217"></a>
<a name="line-218"></a><a name="withYamlEnvironment"></a><span class='hs-comment'>-- | Loads the configuration block in the passed file named by the</span>
<a name="line-219"></a><span class='hs-comment'>-- passed environment, yeilds to the passed function as a mapping.</span>
<a name="line-220"></a><span class='hs-comment'>--</span>
<a name="line-221"></a><span class='hs-comment'>-- Errors in the case of a bad load or if your function returns</span>
<a name="line-222"></a><span class='hs-comment'>-- @Nothing@.</span>
<a name="line-223"></a><span class='hs-definition'>withYamlEnvironment</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Show</span> <span class='hs-varid'>e</span>
<a name="line-224"></a> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>FilePath</span> <span class='hs-comment'>-- ^ the yaml file</span>
<a name="line-225"></a> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span> <span class='hs-comment'>-- ^ the environment you want to load</span>
<a name="line-226"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Value</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Parser</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- ^ what to do with the mapping</span>
<a name="line-227"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span>
<a name="line-228"></a><span class='hs-definition'>withYamlEnvironment</span> <span class='hs-varid'>fp</span> <span class='hs-varid'>env</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-229"></a> <span class='hs-varid'>mval</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>decodeFile</span> <span class='hs-varid'>fp</span>
<a name="line-230"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>mval</span> <span class='hs-keyword'>of</span>
<a name="line-231"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fail</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Invalid YAML file: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>fp</span>
<a name="line-232"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Object</span> <span class='hs-varid'>obj</span><span class='hs-layout'>)</span>
<a name="line-233"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>M</span><span class='hs-varop'>.</span><span class='hs-varid'>lookup</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>pack</span> <span class='hs-varop'>$</span> <span class='hs-varid'>show</span> <span class='hs-varid'>env</span><span class='hs-layout'>)</span> <span class='hs-varid'>obj</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>parseMonad</span> <span class='hs-varid'>f</span> <span class='hs-varid'>v</span>
<a name="line-234"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fail</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Could not find environment: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>env</span>
</pre></body>
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