Rename src/gen --> src/generators.

src/generators/html-pdf-cli-generator.js

@@ -0,0 +1,139 @@
+/**
+Definition of the HtmlPdfCLIGenerator class.
+@module html-pdf-generator.js
+@license MIT. See LICENSE.md for details.
+*/
+
+
+
+(function() {
+
+
+
+  var TemplateGenerator = require('./template-generator')
+    , FS = require('fs-extra')
+    , HTML = require( 'html' )
+    , PATH = require('path')
+    , SLASH = require('slash');
+
+
+
+  /**
+  An HTML-driven PDF resume generator for HackMyResume. Talks to Phantom,
+  wkhtmltopdf, and other PDF engines over a CLI (command-line interface).
+  If an engine isn't installed for a particular platform, error out gracefully.
+  */
+  var HtmlPdfCLIGenerator = module.exports = TemplateGenerator.extend({
+
+
+
+    init: function() {
+      this._super( 'pdf', 'html' );
+    },
+
+
+
+    /**
+    Generate the binary PDF.
+    */
+    onBeforeSave: function( info ) {
+
+      try {
+        var safe_eng = info.opts.pdf || 'wkhtmltopdf';
+        engines[ safe_eng ].call( this, info.mk, info.outputFile );
+        return null; // halt further processing
+      }
+      catch(ex) {
+        // { [Error: write EPIPE] code: 'EPIPE', errno: 'EPIPE', ... }
+        // { [Error: ENOENT] }
+        throw ( ex.inner && ex.inner.code === 'ENOENT' ) ?
+          { fluenterror: this.codes.notOnPath, engine: ex.cmd } :
+          { fluenterror: this.codes.pdfGeneration, inner: ex.inner };
+      }
+    }
+
+
+
+  });
+
+
+
+  // TODO: Move each engine to a separate module
+  var engines = {
+
+
+
+    /**
+    Generate a PDF from HTML using wkhtmltopdf's CLI interface.
+    Spawns a child process with `wkhtmltopdf <source> <target>`. wkhtmltopdf
+    must be installed and path-accessible.
+    TODO: If HTML generation has run, reuse that output
+    TODO: Local web server to ease wkhtmltopdf rendering
+    */
+    wkhtmltopdf: function(markup, fOut) {
+
+      // Save the markup to a temporary file
+      var tempFile = fOut.replace(/\.pdf$/i, '.pdf.html');
+      FS.writeFileSync( tempFile, markup, 'utf8' );
+
+      var spawn = require('child_process').spawnSync;
+      var info = spawn('wkhtmltopdf', [
+        tempFile, fOut
+      ]);
+      if( info.error ) {
+        throw {
+          cmd: 'wkhtmltopdf',
+          inner: info.error
+        };
+      }
+
+      // child.stdout.on('data', function(chunk) {
+      //   // output will be here in chunks
+      // });
+
+      // or if you want to send output elsewhere
+      //child.stdout.pipe(dest);
+    },
+
+
+
+    /**
+    Generate a PDF from HTML using Phantom's CLI interface.
+    Spawns a child process with `phantomjs <script> <source> <target>`. Phantom
+    must be installed and path-accessible.
+    TODO: If HTML generation has run, reuse that output
+    TODO: Local web server to ease Phantom rendering
+    */
+    phantom: function( markup, fOut ) {
+
+      // Save the markup to a temporary file
+      var tempFile = fOut.replace(/\.pdf$/i, '.pdf.html');
+      FS.writeFileSync( tempFile, markup, 'utf8' );
+
+      var scriptPath = SLASH( PATH.relative( process.cwd(),
+        PATH.resolve( __dirname, '../utils/rasterize.js' ) ) );
+      var sourcePath = SLASH( PATH.relative( process.cwd(), tempFile) );
+      var destPath = SLASH( PATH.relative( process.cwd(), fOut) );
+
+      var spawn = require('child_process').spawnSync;
+      var info = spawn('phantomjs', [ scriptPath, sourcePath, destPath ]);
+      if( info.error ) {
+        throw {
+          cmd: 'phantomjs',
+          inner: info.error
+        };
+      }
+
+      // child.stdout.on('data', function(chunk) {
+      //   // output will be here in chunks
+      // });
+      //
+      // // or if you want to send output elsewhere
+      // child.stdout.pipe(dest);
+    }
+
+  };
+
+
+
+}());