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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE OverloadedStrings #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-# LANGUAGE TemplateHaskell #-}</span>
<a name="line-3"></a><span class='hs-comment'>{-# LANGUAGE CPP #-}</span>
<a name="line-4"></a><span class='hs-comment'>-- | Various utilities used in the scaffolded site.</span>
<a name="line-5"></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'>Util</span>
<a name="line-6"></a> <span class='hs-layout'>(</span> <span class='hs-varid'>addStaticContentExternal</span>
<a name="line-7"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>globFile</span>
<a name="line-8"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>widgetFileNoReload</span>
<a name="line-9"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>widgetFileReload</span>
<a name="line-10"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-11"></a>
<a name="line-12"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Class</span> <span class='hs-layout'>(</span><span class='hs-varid'>liftIO</span><span class='hs-layout'>)</span>
<a name="line-13"></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'>ByteString</span><span class='hs-varop'>.</span><span class='hs-conid'>Lazy</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>L</span>
<a name="line-14"></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> <span class='hs-varid'>pack</span><span class='hs-layout'>,</span> <span class='hs-varid'>unpack</span><span class='hs-layout'>)</span>
<a name="line-15"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Yesod</span><span class='hs-varop'>.</span><span class='hs-conid'>Core</span> <span class='hs-comment'>-- purposely using complete import so that Haddock will see addStaticContent</span>
<a name="line-16"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span> <span class='hs-layout'>(</span><span class='hs-varid'>unless</span><span class='hs-layout'>)</span>
<a name="line-17"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Directory</span> <span class='hs-layout'>(</span><span class='hs-varid'>doesFileExist</span><span class='hs-layout'>,</span> <span class='hs-varid'>createDirectoryIfMissing</span><span class='hs-layout'>)</span>
<a name="line-18"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Language</span><span class='hs-varop'>.</span><span class='hs-conid'>Haskell</span><span class='hs-varop'>.</span><span class='hs-conid'>TH</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span>
<a name="line-19"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Lucius</span> <span class='hs-layout'>(</span><span class='hs-varid'>luciusFile</span><span class='hs-layout'>,</span> <span class='hs-varid'>luciusFileReload</span><span class='hs-layout'>)</span>
<a name="line-20"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Julius</span> <span class='hs-layout'>(</span><span class='hs-varid'>juliusFile</span><span class='hs-layout'>,</span> <span class='hs-varid'>juliusFileReload</span><span class='hs-layout'>)</span>
<a name="line-21"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Cassius</span> <span class='hs-layout'>(</span><span class='hs-varid'>cassiusFile</span><span class='hs-layout'>,</span> <span class='hs-varid'>cassiusFileReload</span><span class='hs-layout'>)</span>
<a name="line-22"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Monoid</span> <span class='hs-layout'>(</span><span class='hs-varid'>mempty</span><span class='hs-layout'>)</span>
<a name="line-23"></a>
<a name="line-24"></a><a name="addStaticContentExternal"></a><span class='hs-comment'>-- | An implementation of 'addStaticContent' which stores the contents in an</span>
<a name="line-25"></a><span class='hs-comment'>-- external file. Files are created in the given static folder with names based</span>
<a name="line-26"></a><span class='hs-comment'>-- on a hash of their content. This allows expiration dates to be set far in</span>
<a name="line-27"></a><span class='hs-comment'>-- the future without worry of users receiving stale content.</span>
<a name="line-28"></a><span class='hs-definition'>addStaticContentExternal</span>
<a name="line-29"></a> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Either</span> <span class='hs-varid'>a</span> <span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- ^ javascript minifier</span>
<a name="line-30"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- ^ hash function to determine file name</span>
<a name="line-31"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span> <span class='hs-comment'>-- ^ location of static directory. files will be placed within a "tmp" subfolder</span>
<a name="line-32"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Route</span> <span class='hs-varid'>master</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- ^ route constructor, taking a list of pieces</span>
<a name="line-33"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-comment'>-- ^ filename extension</span>
<a name="line-34"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-comment'>-- ^ mime type</span>
<a name="line-35"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-comment'>-- ^ file contents</span>
<a name="line-36"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GHandler</span> <span class='hs-varid'>sub</span> <span class='hs-varid'>master</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Either</span> <span class='hs-conid'>Text</span> <span class='hs-layout'>(</span><span class='hs-conid'>Route</span> <span class='hs-varid'>master</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>Text</span><span class='hs-layout'>,</span> <span class='hs-conid'>Text</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-37"></a><span class='hs-definition'>addStaticContentExternal</span> <span class='hs-varid'>minify</span> <span class='hs-varid'>hash</span> <span class='hs-varid'>staticDir</span> <span class='hs-varid'>toRoute</span> <span class='hs-varid'>ext'</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>content</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-38"></a> <span class='hs-varid'>liftIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>createDirectoryIfMissing</span> <span class='hs-conid'>True</span> <span class='hs-varid'>statictmp</span>
<a name="line-39"></a> <span class='hs-varid'>exists</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>liftIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>doesFileExist</span> <span class='hs-varid'>fn'</span>
<a name="line-40"></a> <span class='hs-varid'>unless</span> <span class='hs-varid'>exists</span> <span class='hs-varop'>$</span> <span class='hs-varid'>liftIO</span> <span class='hs-varop'>$</span> <span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-varid'>writeFile</span> <span class='hs-varid'>fn'</span> <span class='hs-varid'>content'</span>
<a name="line-41"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Right</span> <span class='hs-layout'>(</span><span class='hs-varid'>toRoute</span> <span class='hs-keyglyph'>[</span><span class='hs-str'>"tmp"</span><span class='hs-layout'>,</span> <span class='hs-varid'>pack</span> <span class='hs-varid'>fn</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span>
<a name="line-42"></a> <span class='hs-keyword'>where</span>
<a name="line-43"></a> <span class='hs-varid'>fn</span><span class='hs-layout'>,</span> <span class='hs-varid'>statictmp</span><span class='hs-layout'>,</span> <span class='hs-varid'>fn'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span>
<a name="line-44"></a> <span class='hs-comment'>-- by basing the hash off of the un-minified content, we avoid a costly</span>
<a name="line-45"></a> <span class='hs-comment'>-- minification if the file already exists</span>
<a name="line-46"></a> <span class='hs-varid'>fn</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hash</span> <span class='hs-varid'>content</span> <span class='hs-varop'>++</span> <span class='hs-chr'>'.'</span> <span class='hs-conop'>:</span> <span class='hs-varid'>unpack</span> <span class='hs-varid'>ext'</span>
<a name="line-47"></a> <span class='hs-varid'>statictmp</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>staticDir</span> <span class='hs-varop'>++</span> <span class='hs-str'>"/tmp/"</span>
<a name="line-48"></a> <span class='hs-varid'>fn'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>statictmp</span> <span class='hs-varop'>++</span> <span class='hs-varid'>fn</span>
<a name="line-49"></a>
<a name="line-50"></a> <span class='hs-varid'>content'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span>
<a name="line-51"></a> <span class='hs-varid'>content'</span>
<a name="line-52"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>ext'</span> <span class='hs-varop'>==</span> <span class='hs-str'>"js"</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>either</span> <span class='hs-layout'>(</span><span class='hs-varid'>const</span> <span class='hs-varid'>content</span><span class='hs-layout'>)</span> <span class='hs-varid'>id</span> <span class='hs-varop'>$</span> <span class='hs-varid'>minify</span> <span class='hs-varid'>content</span>
<a name="line-53"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>content</span>
<a name="line-54"></a>
<a name="line-55"></a><a name="globFile"></a><span class='hs-comment'>-- | expects a file extension for each type, e.g: hamlet lucius julius</span>
<a name="line-56"></a><span class='hs-definition'>globFile</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span>
<a name="line-57"></a><span class='hs-definition'>globFile</span> <span class='hs-varid'>kind</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"templates/"</span> <span class='hs-varop'>++</span> <span class='hs-varid'>x</span> <span class='hs-varop'>++</span> <span class='hs-str'>"."</span> <span class='hs-varop'>++</span> <span class='hs-varid'>kind</span>
<a name="line-58"></a>
<a name="line-59"></a><a name="widgetFileNoReload"></a><span class='hs-definition'>widgetFileNoReload</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Q</span> <span class='hs-conid'>Exp</span>
<a name="line-60"></a><span class='hs-definition'>widgetFileNoReload</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-61"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>whenExists</span> <span class='hs-varid'>x</span> <span class='hs-str'>"hamlet"</span> <span class='hs-varid'>whamletFile</span>
<a name="line-62"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>whenExists</span> <span class='hs-varid'>x</span> <span class='hs-str'>"cassius"</span> <span class='hs-varid'>cassiusFile</span>
<a name="line-63"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>j</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>whenExists</span> <span class='hs-varid'>x</span> <span class='hs-str'>"julius"</span> <span class='hs-varid'>juliusFile</span>
<a name="line-64"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>l</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>whenExists</span> <span class='hs-varid'>x</span> <span class='hs-str'>"lucius"</span> <span class='hs-varid'>luciusFile</span>
<a name="line-65"></a> <span class='hs-keyglyph'>[</span><span class='hs-varop'>|$</span><span class='hs-varid'>h</span> <span class='hs-varop'>>></span> <span class='hs-varid'>addCassius</span> <span class='hs-varop'>$</span><span class='hs-varid'>c</span> <span class='hs-varop'>>></span> <span class='hs-varid'>addJulius</span> <span class='hs-varop'>$</span><span class='hs-varid'>j</span> <span class='hs-varop'>>></span> <span class='hs-varid'>addLucius</span> <span class='hs-varop'>$</span><span class='hs-varid'>l</span><span class='hs-keyglyph'>|</span><span class='hs-keyglyph'>]</span>
<a name="line-66"></a>
<a name="line-67"></a><a name="widgetFileReload"></a><span class='hs-definition'>widgetFileReload</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Q</span> <span class='hs-conid'>Exp</span>
<a name="line-68"></a><span class='hs-definition'>widgetFileReload</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-69"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>whenExists</span> <span class='hs-varid'>x</span> <span class='hs-str'>"hamlet"</span> <span class='hs-varid'>whamletFile</span>
<a name="line-70"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>whenExists</span> <span class='hs-varid'>x</span> <span class='hs-str'>"cassius"</span> <span class='hs-varid'>cassiusFileReload</span>
<a name="line-71"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>j</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>whenExists</span> <span class='hs-varid'>x</span> <span class='hs-str'>"julius"</span> <span class='hs-varid'>juliusFileReload</span>
<a name="line-72"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>l</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>whenExists</span> <span class='hs-varid'>x</span> <span class='hs-str'>"lucius"</span> <span class='hs-varid'>luciusFileReload</span>
<a name="line-73"></a> <span class='hs-keyglyph'>[</span><span class='hs-varop'>|$</span><span class='hs-varid'>h</span> <span class='hs-varop'>>></span> <span class='hs-varid'>addCassius</span> <span class='hs-varop'>$</span><span class='hs-varid'>c</span> <span class='hs-varop'>>></span> <span class='hs-varid'>addJulius</span> <span class='hs-varop'>$</span><span class='hs-varid'>j</span> <span class='hs-varop'>>></span> <span class='hs-varid'>addLucius</span> <span class='hs-varop'>$</span><span class='hs-varid'>l</span><span class='hs-keyglyph'>|</span><span class='hs-keyglyph'>]</span>
<a name="line-74"></a>
<a name="line-75"></a><a name="whenExists"></a><span class='hs-definition'>whenExists</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Q</span> <span class='hs-conid'>Exp</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Q</span> <span class='hs-conid'>Exp</span>
<a name="line-76"></a><span class='hs-definition'>whenExists</span> <span class='hs-varid'>x</span> <span class='hs-varid'>glob</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-77"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>fn</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>globFile</span> <span class='hs-varid'>glob</span> <span class='hs-varid'>x</span>
<a name="line-78"></a> <span class='hs-varid'>e</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>qRunIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>doesFileExist</span> <span class='hs-varid'>fn</span>
<a name="line-79"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>e</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>f</span> <span class='hs-varid'>fn</span> <span class='hs-keyword'>else</span> <span class='hs-keyglyph'>[</span><span class='hs-keyglyph'>|</span><span class='hs-varid'>mempty</span><span class='hs-keyglyph'>|</span><span class='hs-keyglyph'>]</span>
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