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<pre><a name="line-1"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-2"></a><span class='hs-comment'>-- | A store for storing and retreiving items</span>
<a name="line-3"></a><span class='hs-comment'>{-# LANGUAGE ExistentialQuantification #-}</span>
<a name="line-4"></a><span class='hs-comment'>{-# LANGUAGE ScopedTypeVariables #-}</span>
<a name="line-5"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Hakyll</span><span class='hs-varop'>.</span><span class='hs-conid'>Core</span><span class='hs-varop'>.</span><span class='hs-conid'>Store</span>
<a name="line-6"></a> <span class='hs-layout'>(</span> <span class='hs-conid'>Store</span>
<a name="line-7"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Result</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-8"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>toMaybe</span>
<a name="line-9"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>new</span>
<a name="line-10"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>set</span>
<a name="line-11"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>get</span>
<a name="line-12"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>isMember</span>
<a name="line-13"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>delete</span>
<a name="line-14"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>hash</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>
<a name="line-18"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-19"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Applicative</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'><$></span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-20"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Exception</span> <span class='hs-layout'>(</span><span class='hs-conid'>IOException</span><span class='hs-layout'>,</span> <span class='hs-varid'>handle</span><span class='hs-layout'>)</span>
<a name="line-21"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Crypto</span><span class='hs-varop'>.</span><span class='hs-conid'>Hash</span><span class='hs-varop'>.</span><span class='hs-conid'>MD5</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>MD5</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'>Binary</span> <span class='hs-layout'>(</span><span class='hs-conid'>Binary</span><span class='hs-layout'>,</span> <span class='hs-varid'>decode</span><span class='hs-layout'>,</span> <span class='hs-varid'>encodeFile</span><span class='hs-layout'>)</span>
<a name="line-23"></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-keyword'>as</span> <span class='hs-conid'>B</span>
<a name="line-24"></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'>BL</span>
<a name="line-25"></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'>Cache</span><span class='hs-varop'>.</span><span class='hs-conid'>LRU</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>Lru</span>
<a name="line-26"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span> <span class='hs-layout'>(</span><span class='hs-varid'>intercalate</span><span class='hs-layout'>)</span>
<a name="line-27"></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'>isJust</span><span class='hs-layout'>)</span>
<a name="line-28"></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-29"></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-varop'>.</span><span class='hs-conid'>Encoding</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>T</span>
<a name="line-30"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Typeable</span> <span class='hs-layout'>(</span><span class='hs-conid'>TypeRep</span><span class='hs-layout'>,</span> <span class='hs-conid'>Typeable</span><span class='hs-layout'>,</span> <span class='hs-varid'>cast</span><span class='hs-layout'>,</span> <span class='hs-varid'>typeOf</span><span class='hs-layout'>)</span>
<a name="line-31"></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'>createDirectoryIfMissing</span><span class='hs-layout'>)</span>
<a name="line-32"></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'>removeFile</span><span class='hs-layout'>)</span>
<a name="line-33"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>FilePath</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'></></span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-34"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>IOMode</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>hClose</span><span class='hs-layout'>,</span> <span class='hs-varid'>openFile</span><span class='hs-layout'>)</span>
<a name="line-35"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Printf</span> <span class='hs-layout'>(</span><span class='hs-varid'>printf</span><span class='hs-layout'>)</span>
<a name="line-36"></a>
<a name="line-37"></a>
<a name="line-38"></a><a name="Box"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-39"></a><a name="Box"></a><span class='hs-comment'>-- | Simple wrapper type</span>
<a name="line-40"></a><a name="Box"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Box</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>forall</span> <span class='hs-varid'>a</span><span class='hs-varop'>.</span> <span class='hs-conid'>Typeable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Box</span> <span class='hs-varid'>a</span>
<a name="line-41"></a>
<a name="line-42"></a>
<a name="line-43"></a><a name="Store"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-44"></a><a name="Store"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Store</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Store</span>
<a name="line-45"></a> <span class='hs-layout'>{</span> <span class='hs-comment'>-- | All items are stored on the filesystem</span>
<a name="line-46"></a> <span class='hs-varid'>storeDirectory</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span>
<a name="line-47"></a> <span class='hs-layout'>,</span> <span class='hs-comment'>-- | Optionally, items are also kept in-memory</span>
<a name="line-48"></a> <span class='hs-varid'>storeMap</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Lru</span><span class='hs-varop'>.</span><span class='hs-conid'>AtomicLRU</span> <span class='hs-conid'>FilePath</span> <span class='hs-conid'>Box</span><span class='hs-layout'>)</span>
<a name="line-49"></a> <span class='hs-layout'>}</span>
<a name="line-50"></a>
<a name="line-51"></a>
<a name="line-52"></a><a name="instance%20Show%20Store"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-53"></a><a name="instance%20Show%20Store"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-conid'>Store</span> <span class='hs-keyword'>where</span>
<a name="line-54"></a> <span class='hs-varid'>show</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"<Store>"</span>
<a name="line-55"></a>
<a name="line-56"></a>
<a name="line-57"></a><a name="Result"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-58"></a><a name="Result"></a><span class='hs-comment'>-- | Result of a store query</span>
<a name="line-59"></a><a name="Result"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Result</span> <span class='hs-varid'>a</span>
<a name="line-60"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Found</span> <span class='hs-varid'>a</span> <span class='hs-comment'>-- ^ Found, result</span>
<a name="line-61"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>NotFound</span> <span class='hs-comment'>-- ^ Not found</span>
<a name="line-62"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>WrongType</span> <span class='hs-conid'>TypeRep</span> <span class='hs-conid'>TypeRep</span> <span class='hs-comment'>-- ^ Expected, true type</span>
<a name="line-63"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span><span class='hs-layout'>,</span> <span class='hs-conid'>Eq</span><span class='hs-layout'>)</span>
<a name="line-64"></a>
<a name="line-65"></a>
<a name="line-66"></a><a name="toMaybe"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-67"></a><span class='hs-comment'>-- | Convert result to 'Maybe'</span>
<a name="line-68"></a><span class='hs-definition'>toMaybe</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Result</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-varid'>a</span>
<a name="line-69"></a><span class='hs-definition'>toMaybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Found</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>x</span>
<a name="line-70"></a><span class='hs-definition'>toMaybe</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-71"></a>
<a name="line-72"></a>
<a name="line-73"></a><a name="new"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-74"></a><span class='hs-comment'>-- | Initialize the store</span>
<a name="line-75"></a><span class='hs-definition'>new</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span> <span class='hs-comment'>-- ^ Use in-memory caching</span>
<a name="line-76"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span> <span class='hs-comment'>-- ^ Directory to use for hard disk storage</span>
<a name="line-77"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Store</span> <span class='hs-comment'>-- ^ Store</span>
<a name="line-78"></a><span class='hs-definition'>new</span> <span class='hs-varid'>inMemory</span> <span class='hs-varid'>directory</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-79"></a> <span class='hs-varid'>createDirectoryIfMissing</span> <span class='hs-conid'>True</span> <span class='hs-varid'>directory</span>
<a name="line-80"></a> <span class='hs-varid'>ref</span> <span class='hs-keyglyph'><-</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>inMemory</span> <span class='hs-keyword'>then</span> <span class='hs-conid'>Just</span> <span class='hs-varop'><$></span> <span class='hs-conid'>Lru</span><span class='hs-varop'>.</span><span class='hs-varid'>newAtomicLRU</span> <span class='hs-varid'>csize</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span>
<a name="line-81"></a> <span class='hs-varid'>return</span> <span class='hs-conid'>Store</span>
<a name="line-82"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>storeDirectory</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>directory</span>
<a name="line-83"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>storeMap</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ref</span>
<a name="line-84"></a> <span class='hs-layout'>}</span>
<a name="line-85"></a> <span class='hs-keyword'>where</span>
<a name="line-86"></a> <span class='hs-varid'>csize</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-num'>500</span>
<a name="line-87"></a>
<a name="line-88"></a>
<a name="line-89"></a><a name="cacheInsert"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-90"></a><span class='hs-comment'>-- | Auxiliary: add an item to the in-memory cache</span>
<a name="line-91"></a><span class='hs-definition'>cacheInsert</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Typeable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Store</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-92"></a><span class='hs-definition'>cacheInsert</span> <span class='hs-layout'>(</span><span class='hs-conid'>Store</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</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-93"></a><span class='hs-definition'>cacheInsert</span> <span class='hs-layout'>(</span><span class='hs-conid'>Store</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>lru</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>key</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span>
<a name="line-94"></a> <span class='hs-conid'>Lru</span><span class='hs-varop'>.</span><span class='hs-varid'>insert</span> <span class='hs-varid'>key</span> <span class='hs-layout'>(</span><span class='hs-conid'>Box</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varid'>lru</span>
<a name="line-95"></a>
<a name="line-96"></a>
<a name="line-97"></a><a name="cacheLookup"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-98"></a><span class='hs-comment'>-- | Auxiliary: get an item from the in-memory cache</span>
<a name="line-99"></a><span class='hs-definition'>cacheLookup</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyword'>forall</span> <span class='hs-varid'>a</span><span class='hs-varop'>.</span> <span class='hs-conid'>Typeable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Store</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Result</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-100"></a><span class='hs-definition'>cacheLookup</span> <span class='hs-layout'>(</span><span class='hs-conid'>Store</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>NotFound</span>
<a name="line-101"></a><span class='hs-definition'>cacheLookup</span> <span class='hs-layout'>(</span><span class='hs-conid'>Store</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>lru</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>key</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-102"></a> <span class='hs-varid'>res</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>Lru</span><span class='hs-varop'>.</span><span class='hs-varid'>lookup</span> <span class='hs-varid'>key</span> <span class='hs-varid'>lru</span>
<a name="line-103"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>res</span> <span class='hs-keyword'>of</span>
<a name="line-104"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>NotFound</span>
<a name="line-105"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Box</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>cast</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span>
<a name="line-106"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>x'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Found</span> <span class='hs-varid'>x'</span>
<a name="line-107"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>WrongType</span> <span class='hs-layout'>(</span><span class='hs-varid'>typeOf</span> <span class='hs-layout'>(</span><span class='hs-varid'>undefined</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>typeOf</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-108"></a>
<a name="line-109"></a>
<a name="line-110"></a><a name="cacheIsMember"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-111"></a><span class='hs-definition'>cacheIsMember</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Store</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Bool</span>
<a name="line-112"></a><span class='hs-definition'>cacheIsMember</span> <span class='hs-layout'>(</span><span class='hs-conid'>Store</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>False</span>
<a name="line-113"></a><span class='hs-definition'>cacheIsMember</span> <span class='hs-layout'>(</span><span class='hs-conid'>Store</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>lru</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>key</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>isJust</span> <span class='hs-varop'><$></span> <span class='hs-conid'>Lru</span><span class='hs-varop'>.</span><span class='hs-varid'>lookup</span> <span class='hs-varid'>key</span> <span class='hs-varid'>lru</span>
<a name="line-114"></a>
<a name="line-115"></a>
<a name="line-116"></a><a name="cacheDelete"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-117"></a><span class='hs-comment'>-- | Auxiliary: delete an item from the in-memory cache</span>
<a name="line-118"></a><span class='hs-definition'>cacheDelete</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Store</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-119"></a><span class='hs-definition'>cacheDelete</span> <span class='hs-layout'>(</span><span class='hs-conid'>Store</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</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-120"></a><span class='hs-definition'>cacheDelete</span> <span class='hs-layout'>(</span><span class='hs-conid'>Store</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>lru</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>key</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-121"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>Lru</span><span class='hs-varop'>.</span><span class='hs-varid'>delete</span> <span class='hs-varid'>key</span> <span class='hs-varid'>lru</span>
<a name="line-122"></a> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-123"></a>
<a name="line-124"></a>
<a name="line-125"></a><a name="set"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-126"></a><span class='hs-comment'>-- | Store an item</span>
<a name="line-127"></a><span class='hs-definition'>set</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Binary</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Typeable</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Store</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-128"></a><span class='hs-definition'>set</span> <span class='hs-varid'>store</span> <span class='hs-varid'>identifier</span> <span class='hs-varid'>value</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-129"></a> <span class='hs-varid'>encodeFile</span> <span class='hs-layout'>(</span><span class='hs-varid'>storeDirectory</span> <span class='hs-varid'>store</span> <span class='hs-varop'></></span> <span class='hs-varid'>key</span><span class='hs-layout'>)</span> <span class='hs-varid'>value</span>
<a name="line-130"></a> <span class='hs-varid'>cacheInsert</span> <span class='hs-varid'>store</span> <span class='hs-varid'>key</span> <span class='hs-varid'>value</span>
<a name="line-131"></a> <span class='hs-keyword'>where</span>
<a name="line-132"></a> <span class='hs-varid'>key</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hash</span> <span class='hs-varid'>identifier</span>
<a name="line-133"></a>
<a name="line-134"></a>
<a name="line-135"></a><a name="get"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-136"></a><span class='hs-comment'>-- | Load an item</span>
<a name="line-137"></a><span class='hs-definition'>get</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Binary</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Typeable</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Store</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Result</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-138"></a><span class='hs-definition'>get</span> <span class='hs-varid'>store</span> <span class='hs-varid'>identifier</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-139"></a> <span class='hs-comment'>-- First check the in-memory map</span>
<a name="line-140"></a> <span class='hs-varid'>ref</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>cacheLookup</span> <span class='hs-varid'>store</span> <span class='hs-varid'>key</span>
<a name="line-141"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>ref</span> <span class='hs-keyword'>of</span>
<a name="line-142"></a> <span class='hs-comment'>-- Not found in the map, try the filesystem</span>
<a name="line-143"></a> <span class='hs-conid'>NotFound</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-144"></a> <span class='hs-varid'>exists</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>doesFileExist</span> <span class='hs-varid'>path</span>
<a name="line-145"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>not</span> <span class='hs-varid'>exists</span>
<a name="line-146"></a> <span class='hs-comment'>-- Not found in the filesystem either</span>
<a name="line-147"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-conid'>NotFound</span>
<a name="line-148"></a> <span class='hs-comment'>-- Found in the filesystem</span>
<a name="line-149"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span>
<a name="line-150"></a> <span class='hs-varid'>v</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>decodeClose</span>
<a name="line-151"></a> <span class='hs-varid'>cacheInsert</span> <span class='hs-varid'>store</span> <span class='hs-varid'>key</span> <span class='hs-varid'>v</span>
<a name="line-152"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Found</span> <span class='hs-varid'>v</span>
<a name="line-153"></a> <span class='hs-comment'>-- Found in the in-memory map (or wrong type), just return</span>
<a name="line-154"></a> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varid'>s</span>
<a name="line-155"></a> <span class='hs-keyword'>where</span>
<a name="line-156"></a> <span class='hs-varid'>key</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hash</span> <span class='hs-varid'>identifier</span>
<a name="line-157"></a> <span class='hs-varid'>path</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>storeDirectory</span> <span class='hs-varid'>store</span> <span class='hs-varop'></></span> <span class='hs-varid'>key</span>
<a name="line-158"></a>
<a name="line-159"></a> <span class='hs-comment'>-- 'decodeFile' from Data.Binary which closes the file ASAP</span>
<a name="line-160"></a> <span class='hs-varid'>decodeClose</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-161"></a> <span class='hs-varid'>h</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>openFile</span> <span class='hs-varid'>path</span> <span class='hs-conid'>ReadMode</span>
<a name="line-162"></a> <span class='hs-varid'>lbs</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>hGetContents</span> <span class='hs-varid'>h</span>
<a name="line-163"></a> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span> <span class='hs-varid'>lbs</span> <span class='hs-varop'>`seq`</span> <span class='hs-varid'>hClose</span> <span class='hs-varid'>h</span>
<a name="line-164"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>decode</span> <span class='hs-varid'>lbs</span>
<a name="line-165"></a>
<a name="line-166"></a>
<a name="line-167"></a><a name="isMember"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-168"></a><span class='hs-comment'>-- | Strict function</span>
<a name="line-169"></a><span class='hs-definition'>isMember</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Store</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Bool</span>
<a name="line-170"></a><span class='hs-definition'>isMember</span> <span class='hs-varid'>store</span> <span class='hs-varid'>identifier</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-171"></a> <span class='hs-varid'>inCache</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>cacheIsMember</span> <span class='hs-varid'>store</span> <span class='hs-varid'>key</span>
<a name="line-172"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>inCache</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-conid'>True</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>doesFileExist</span> <span class='hs-varid'>path</span>
<a name="line-173"></a> <span class='hs-keyword'>where</span>
<a name="line-174"></a> <span class='hs-varid'>key</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hash</span> <span class='hs-varid'>identifier</span>
<a name="line-175"></a> <span class='hs-varid'>path</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>storeDirectory</span> <span class='hs-varid'>store</span> <span class='hs-varop'></></span> <span class='hs-varid'>key</span>
<a name="line-176"></a>
<a name="line-177"></a>
<a name="line-178"></a><a name="delete"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-179"></a><span class='hs-comment'>-- | Delete an item</span>
<a name="line-180"></a><span class='hs-definition'>delete</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Store</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-181"></a><span class='hs-definition'>delete</span> <span class='hs-varid'>store</span> <span class='hs-varid'>identifier</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-182"></a> <span class='hs-varid'>cacheDelete</span> <span class='hs-varid'>store</span> <span class='hs-varid'>key</span>
<a name="line-183"></a> <span class='hs-varid'>deleteFile</span> <span class='hs-varop'>$</span> <span class='hs-varid'>storeDirectory</span> <span class='hs-varid'>store</span> <span class='hs-varop'></></span> <span class='hs-varid'>key</span>
<a name="line-184"></a> <span class='hs-keyword'>where</span>
<a name="line-185"></a> <span class='hs-varid'>key</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hash</span> <span class='hs-varid'>identifier</span>
<a name="line-186"></a>
<a name="line-187"></a>
<a name="line-188"></a><a name="deleteFile"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-189"></a><span class='hs-comment'>-- | Delete a file unless it doesn't exist...</span>
<a name="line-190"></a><span class='hs-definition'>deleteFile</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-191"></a><span class='hs-definition'>deleteFile</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>handle</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-keyword'>_</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IOException</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>removeFile</span>
<a name="line-192"></a>
<a name="line-193"></a>
<a name="line-194"></a><a name="hash"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-195"></a><span class='hs-comment'>-- | Mostly meant for internal usage</span>
<a name="line-196"></a><span class='hs-definition'>hash</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-197"></a><span class='hs-definition'>hash</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>concatMap</span> <span class='hs-layout'>(</span><span class='hs-varid'>printf</span> <span class='hs-str'>"%02x"</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varop'>.</span>
<a name="line-198"></a> <span class='hs-conid'>MD5</span><span class='hs-varop'>.</span><span class='hs-varid'>hash</span> <span class='hs-varop'>.</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>encodeUtf8</span> <span class='hs-varop'>.</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'>intercalate</span> <span class='hs-str'>"/"</span>
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