Class: Puppeteer::ExecutionContext

Inherits:
Object
  • Object
show all
Defined in:
lib/isomorfeus/puppeteer/execution_context.rb

Instance Method Summary collapse

Instance Method Details

#await_ruby(ruby_source = '', &block) ⇒ Object 



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# File 'lib/isomorfeus/puppeteer/execution_context.rb', line 35

def await_ruby(ruby_source = '', &block)
  ruby_source = Isomorfeus::Puppetmaster.block_source_code(&block) if block_given?
  ruby_source = "#{ruby_source}.then { |result| $promise_result = result; $promise_resolved = true }.fail { |result| $promise_result = result; $promise_resolved = true }"
  compiled_ruby = Isomorfeus::Puppetmaster.compile_ruby_source(ruby_source)
  evaluate <<~JAVASCRIPT
    function(){
      fun = function() {
        if (Opal) {
          Opal.gvars.promise_resolved = false;
          Opal.await_ruby_exception = null;
          try {
            return #{compiled_ruby}
          } catch (e) {
            Opal.await_ruby_exception = e;
            Opal.gvars.promise_resolved = true;
          }
        } else {
          setTimeout(fun, 100);
        }
      }
      fun();
    }
  JAVASCRIPT
  have_result = false
  start = Time.now
  until have_result do
    raise "await_ruby: execution timed out! Is Opal available?" if (Time.now - start) > 30
    have_result = evaluate 'function() { return Opal ? Opal.gvars.promise_resolved : null; }'
    sleep 0.1 unless have_result
  end
  result, exception = evaluate <<~JAVASCRIPT
    function () {
      var result;
      var exception = false;
      if (Opal.await_ruby_exception) {
        var e = Opal.await_ruby_exception;
        exception = { message: e.message, name: e.name, stack: e.stack }
      } else if (Opal.gvars.promise_result['$respond_to?']('is_a?') && Opal.gvars.promise_result['$is_a?'](Opal.Exception)) {
        let r = Opal.gvars.promise_result;
        exception = { message: r.$message(), name: r.$class().$name(), stack: r.$backtrace() }
      } else if (Opal.gvars.promise_result['$respond_to?']('to_n')) {
        result = Opal.gvars.promise_result.$to_n()
      } else { result = Opal.gvars.promise_result };
      delete Opal.gvars.promise_result;
      delete Opal.gvars.promise_resolved;
      return [result, exception];
    }
  JAVASCRIPT
  if exception
    e = RuntimeError.new("#{exception['name']}: #{exception['message']}")
    e.set_backtrace(exception['stack'])
    raise e
  end
  result
end

#eval_ruby(ruby_source = '', &block) ⇒ Object 



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# File 'lib/isomorfeus/puppeteer/execution_context.rb', line 2

def eval_ruby(ruby_source = '', &block)
  ruby_source = Isomorfeus::Puppetmaster.block_source_code(&block) if block_given?
  compiled_ruby = Isomorfeus::Puppetmaster.compile_ruby_source(ruby_source)
  res = evaluate "function(){ try { return #{compiled_ruby} } catch (e) { return { error: e.name, message: e.message, stack: e.stack }; }}"
  if res.is_a?(Hash) && res.key?('error') && res.key?('message') && res.key?('stack')
    e = RuntimeError.new("#{res['error']}: #{res['message']}")
    e.set_backtrace(res['stack'].lines)
    raise e
  end
  res
end

#eval_with_opal(ruby_source = '', &block) ⇒ Object 



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# File 'lib/isomorfeus/puppeteer/execution_context.rb', line 14

def eval_with_opal(ruby_source = '', &block)
  ruby_source = Isomorfeus::Puppetmaster.block_source_code(&block) if block_given?
  compiled_ruby = Isomorfeus::Puppetmaster.compile_ruby_source(ruby_source)
  res = evaluate <<~JAVASCRIPT
    function(){
      if (typeof Opal === "undefined") {
        #{Isomorfeus::Puppetmaster.opal_prelude}
      }
      try { return #{compiled_ruby} }
      catch (e) { return { error: e.name, message: e.message, stack: e.stack }; }
    }
  JAVASCRIPT
  if res.is_a?(Hash) && res.key?('error') && res.key?('message') && res.key?('stack')
    e = RuntimeError.new("#{res['error']}: #{res['message']}")
    e.set_backtrace(res['stack'].lines)
    raise e
  end
  res
end