M000293.html in ripxplore-0.12.0

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-  <title>is_file_system_image_filename? (FileSystemImage)</title>
+  <title>best_fit (FileSystemImage)</title>
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-  <pre><span class="ruby-comment cmt"># File lib/FileSystemImage.rb, line 11</span>
-<span class="ruby-keyword kw">def</span> <span class="ruby-constant">FileSystemImage</span>.<span class="ruby-identifier">is_file_system_image_filename?</span>(<span class="ruby-identifier">filename</span>)
+  <pre><span class="ruby-comment cmt"># File lib/FileSystemImage.rb, line 20</span>
+<span class="ruby-keyword kw">def</span> <span class="ruby-constant">FileSystemImage</span>.<span class="ruby-identifier">best_fit</span>(<span class="ruby-identifier">file_bytes</span>,<span class="ruby-identifier">filename</span>=<span class="ruby-keyword kw">nil</span>)
+  <span class="ruby-identifier">candidates</span>=[]
+  <span class="ruby-identifier">file_ext</span>=<span class="ruby-constant">File</span>.<span class="ruby-identifier">extname</span>(<span class="ruby-identifier">filename</span>.<span class="ruby-identifier">sub</span>(<span class="ruby-regexp re">/\.gz$/</span>,<span class="ruby-value str">&quot;&quot;</span>)).<span class="ruby-identifier">downcase</span>
+  <span class="ruby-constant">RipXploreLog</span>.<span class="ruby-identifier">debug</span>(<span class="ruby-node">&quot;looking for best fit for image format for #{filename} : extension #{file_ext}&quot;</span>)
+  <span class="ruby-constant">ImageFormat</span>.<span class="ruby-identifier">all_image_formats</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">image_format</span><span class="ruby-operator">|</span>
+    <span class="ruby-keyword kw">if</span> <span class="ruby-operator">!</span><span class="ruby-identifier">file_ext</span>.<span class="ruby-identifier">nil?</span> <span class="ruby-operator">&amp;&amp;</span> <span class="ruby-operator">!</span><span class="ruby-identifier">image_format</span>.<span class="ruby-identifier">possible_extensions</span>.<span class="ruby-identifier">include?</span>(<span class="ruby-identifier">file_ext</span>) <span class="ruby-keyword kw">then</span>
+      <span class="ruby-constant">RipXploreLog</span>.<span class="ruby-identifier">debug</span>(<span class="ruby-node">&quot;skipping #{image_format} - unmatched extension #{file_ext}&quot;</span>)
+    <span class="ruby-keyword kw">else</span>
+      <span class="ruby-identifier">image_format</span>.<span class="ruby-identifier">possible_file_systems</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">file_system</span><span class="ruby-operator">|</span>
+        <span class="ruby-constant">RipXploreLog</span>.<span class="ruby-identifier">debug</span>(<span class="ruby-node">&quot;checking image format #{image_format} and file system #{file_system}&quot;</span>)
+        <span class="ruby-identifier">candidate</span>=<span class="ruby-constant">FileSystemImage</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">file_bytes</span>,<span class="ruby-identifier">file_system</span>,<span class="ruby-identifier">image_format</span>,<span class="ruby-identifier">filename</span>)
+        <span class="ruby-constant">RipXploreLog</span>.<span class="ruby-identifier">debug</span>(<span class="ruby-node">&quot;score - #{candidate.compatability_score}&quot;</span>)
+        <span class="ruby-identifier">candidates</span><span class="ruby-operator">&lt;&lt;</span><span class="ruby-identifier">candidate</span>
+      <span class="ruby-keyword kw">end</span>
+    <span class="ruby-keyword kw">end</span>    
+  <span class="ruby-keyword kw">end</span>
   
-  <span class="ruby-identifier">extension</span>=<span class="ruby-constant">File</span>.<span class="ruby-identifier">extname</span>(<span class="ruby-constant">File</span>.<span class="ruby-identifier">basename</span>(<span class="ruby-identifier">filename</span>,<span class="ruby-value str">&quot;.gz&quot;</span>)).<span class="ruby-identifier">downcase</span>
-  <span class="ruby-constant">RipXploreLog</span>.<span class="ruby-identifier">debug</span>(<span class="ruby-node">&quot;checking if is file system image filename - #{filename} (extension #{extension})&quot;</span>)
-  <span class="ruby-constant">RipXploreLog</span>.<span class="ruby-identifier">debug</span>(<span class="ruby-constant">ImageFormat</span>.<span class="ruby-identifier">all_possible_extensions</span>.<span class="ruby-identifier">join</span>(<span class="ruby-value str">&quot;;&quot;</span>))
-  <span class="ruby-constant">ImageFormat</span>.<span class="ruby-identifier">all_possible_extensions</span>.<span class="ruby-identifier">include?</span>(<span class="ruby-identifier">extension</span>)
+  
+  <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">candidates</span>.<span class="ruby-identifier">length</span><span class="ruby-operator">==</span><span class="ruby-value">0</span> <span class="ruby-keyword kw">then</span>
+    <span class="ruby-constant">RipXploreLog</span>.<span class="ruby-identifier">debug</span>( <span class="ruby-value str">'no valid combination of file system and image format found'</span>)
+    <span class="ruby-keyword kw">return</span> <span class="ruby-keyword kw">nil</span>
+  <span class="ruby-keyword kw">end</span>
+  <span class="ruby-identifier">best_candidate</span>=<span class="ruby-identifier">candidates</span>.<span class="ruby-identifier">sort</span>{<span class="ruby-operator">|</span><span class="ruby-identifier">a</span>,<span class="ruby-identifier">b</span><span class="ruby-operator">|</span> <span class="ruby-identifier">b</span>.<span class="ruby-identifier">compatability_score</span><span class="ruby-operator">&lt;=&gt;</span><span class="ruby-identifier">a</span>.<span class="ruby-identifier">compatability_score</span>}[<span class="ruby-value">0</span>]
+  <span class="ruby-constant">RipXploreLog</span>.<span class="ruby-identifier">debug</span>(<span class="ruby-node">&quot;best candidate = #{best_candidate.file_system}/#{best_candidate.image_format} score: #{best_candidate.compatability_score}&quot;</span>)
+  <span class="ruby-identifier">best_candidate</span>
 <span class="ruby-keyword kw">end</span></pre>
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