Class: AuthorEngine::OpalExporter

Inherits:
Object
  • Object
show all
Defined in:
lib/author_engine/game/opal/exporter.rb

Instance Method Summary collapse

Constructor Details

#initialize(project_file:) ⇒ OpalExporter

Returns a new instance of OpalExporter.



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# File 'lib/author_engine/game/opal/exporter.rb', line 7

def initialize(project_file:)
  @project_file = project_file

  save(export)
end

Instance Method Details

#author_engine_runtime ⇒ Object 



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# File 'lib/author_engine/game/opal/exporter.rb', line 73

def author_engine_runtime
  program = %{
require "author_engine/opal"

`var callback = function(){
  \#{AuthorEngine::GameRunner.new(`projectString`).show}
};

if (
document.readyState === "complete" ||
(document.readyState !== "loading" && !document.documentElement.doScroll)
) {
  callback();
} else {
  document.addEventListener("DOMContentLoaded", callback);
}`
  }

  puts "Transpiling to JavaScript using Opal..."

  author_engine_builder = nil
  if build_authorengine?
    puts "  Building AuthorEngine runtime..."

    author_engine_builder = Opal::Builder.new
    base_path = File.expand_path("../../../..", __FILE__)
    author_engine_builder.append_paths("#{base_path}")

    author_engine_builder.build_require("author_engine/opal")
  else
    puts "  Skipping AuthorEngine runtime. Already exists and up to date (v#{AuthorEngine::VERSION})..."
  end

  author_engine_js = nil
  if author_engine_builder
    author_engine_js = author_engine_builder.build_str(program, "(inline)").to_s
  end

  return author_engine_js
end

#build_authorengine? ⇒ Boolean

Rebuild author_engine runtime if it doesn’t exist or if its out of date

Returns:

  • (Boolean) 


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# File 'lib/author_engine/game/opal/exporter.rb', line 19

def build_authorengine?
  authorengine_runtime = "#{export_directory}/js/author_engine.js"

  if File.exists?(authorengine_runtime)
    file = File.open(authorengine_runtime)
    version = file.first.gsub("/", "").strip
    file.close

    AuthorEngine::VERSION != version
  else
    true
  end
end

#export ⇒ Object 



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# File 'lib/author_engine/game/opal/exporter.rb', line 167

def export
  template
end

#export_directory ⇒ Object 



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# File 'lib/author_engine/game/opal/exporter.rb', line 171

def export_directory
  filename  = File.basename(@project_file)
  directory = File.expand_path(@project_file.sub(filename, ''))
  name      = filename.sub(".authorengine", "")

  return "#{directory}/#{name}"
end

#project ⇒ Object 



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# File 'lib/author_engine/game/opal/exporter.rb', line 65

def project
  file = File.read(@project_file)

  %{
var projectString = `#{file}`;
  }
end

#project_name ⇒ Object 



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# File 'lib/author_engine/game/opal/exporter.rb', line 13

def project_name
  name = File.basename(@project_file, ".authorengine")
  return name.split("_").map {|n| n.capitalize}.join(" ")
end

#save(string) ⇒ Object 



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# File 'lib/author_engine/game/opal/exporter.rb', line 179

def save(string)
  filename  = File.basename(@project_file)
  directory = File.expand_path(@project_file.sub(filename, ''))
  name      = filename.sub(".authorengine", "")
  export_path = "#{directory}/#{name}"

  unless File.exists?(export_path)
    Dir.mkdir(export_path)
  end
  unless File.exists?("#{export_path}/fonts")
    Dir.mkdir("#{export_path}/fonts")
  end
  unless File.exists?("#{export_path}/js")
    Dir.mkdir("#{export_path}/js")
  end

  puts "Saving to \"#{export_path}\""
  File.open("#{export_path}/#{name}.html", "w") do |file|
    file.write(string)
  end

  local = File.expand_path("../../../../../vendor", __FILE__)
  FileUtils.cp(["#{local}/opal.min.js", "#{local}/opal.min.js"], "#{export_directory}/js")

  puts "  Building game..."
  File.open("#{export_path}/game.js", "w") do |file|
    file.write(project)
  end

  if runtime = author_engine_runtime
    File.open("#{export_path}/js/author_engine.js", "w") do |file|
      file.write("// #{AuthorEngine::VERSION}\n")
      file.write(runtime)
    end
  end

  fonts_path = "#{File.expand_path("../../../../../", __FILE__)}/assets/fonts"
  font_files = Dir.glob("#{fonts_path}/*")
  font_files.each do |file|
    FileUtils.cp(file, "#{export_path}/fonts/#{File.basename(file)}")
  end

  puts "Saved."
end

#stylesheet ⇒ Object 



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# File 'lib/author_engine/game/opal/exporter.rb', line 33

def stylesheet
  %{
@font-face { font-family: Connection; src: url('fonts/Connection.otf'); }
@font-face { font-family: ConnectionBold; src: url('fonts/ConnectionBold.otf'); }

body {
  margin: 0;
  padding: 0;
  background: #222;
}
#canvas {
  display: block;
  margin: 0 auto;
  cursor: none;
}
#loading {
  font-family: Connection, sans-serif;
  color: white;
  text-align: center;

  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  width: 50%;
  height: 30%;
  margin: auto;
}
  }
end

#template ⇒ Object 



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# File 'lib/author_engine/game/opal/exporter.rb', line 114

def template
  %{
<!doctype html5>
<html>
  <head>
<meta content="width=device-width, initial-scale=1" name="viewport" />
<meta charset="utf-8" />
<title>#{project_name} | AuthorEngine</title>
  </head>
  <style>
#{stylesheet}
  </style>
  <body>
<h1 id="loading">Loading...</h1>
<canvas id="canvas">
  <h1>Your Browser Does Not Support HTML5 Canvas!</h1>
</canvas>

<script src="game.js"></script>
<script>
  // Add a small delay before loading application in order to finish loading page and show "Loading..."
  window.setTimeout(function() {
    console.log("Loading Opal...");

    var opal = document.createElement('script');
    opal.onload = function() {
      console.log("Loading Opal Parser...");

      var opal_parser = document.createElement('script');
      opal_parser.onload = function() {
        Opal.load('opal-parser');

        console.log("Loading AuthorEngine runtime...");

        var author_engine_runtime = document.createElement('script');
        author_engine_runtime.src = "js/author_engine.js";

        document.head.appendChild(author_engine_runtime);
      }
      opal_parser.src = "js/opal-parser.min.js";

      document.head.appendChild(opal_parser);
    }
    opal.src = "js/opal.min.js";

    document.head.appendChild(opal);
  }, 500);
</script>
  </body>
</html>
  }
end