Class: EmberSerialize::Serializer

Inherits:
Object
  • Object
show all
Defined in:
lib/ember_serialize.rb

Class Attribute Summary collapse

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(args) ⇒ Serializer

Returns a new instance of Serializer.



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# File 'lib/ember_serialize.rb', line 9

def initialize(args)
  @args = args
  # args
  @missing = args.extras.include?(':create') ? :create : :skip
  @force_async = args.extras.grep(/^async\:/) {|e| e =~ /true/}.first
  # variables
  @est = "ember_serialize:start"
  @een = "ember_serialize:end"
  @eig = "ember_serialize:ignore"
  @eai = "ember_serialize:as_is"
  @eas = "ember_serialize:async"
  @javascripts_dir = self.class.javascripts_dir || "app/assets/javascripts/"
  @models_dir = self.class.models_dir || @javascripts_dir+"models/"
  unless File.exists? @models_dir
    require 'fileutils'
    FileUtils.mkdir_p @models_dir
  end
  # engine / extension
  engine = args.extras.grep(/^engine\:/) {|e| e.gsub(/^.*:/,'').to_sym}.first
  if engine == :coffee
    @extension = ".js.coffee"
  elsif engine == :em
    @extension = ".js.em"
  else
    @extension = detect_extension
  end
end

Class Attribute Details

.javascripts_dir ⇒ Object

Returns the value of attribute javascripts_dir.



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# File 'lib/ember_serialize.rb', line 4

def javascripts_dir
  @javascripts_dir
end

.models_dir ⇒ Object

Returns the value of attribute models_dir.



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# File 'lib/ember_serialize.rb', line 4

def models_dir
  @models_dir
end

Instance Attribute Details

#args ⇒ Object

Returns the value of attribute args.



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# File 'lib/ember_serialize.rb', line 7

def args
  @args
end

#eai ⇒ Object

Returns the value of attribute eai.



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# File 'lib/ember_serialize.rb', line 7

def eai
  @eai
end

#eas ⇒ Object

Returns the value of attribute eas.



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# File 'lib/ember_serialize.rb', line 7

def eas
  @eas
end

#een ⇒ Object

Returns the value of attribute een.



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# File 'lib/ember_serialize.rb', line 7

def een
  @een
end

#eig ⇒ Object

Returns the value of attribute eig.



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# File 'lib/ember_serialize.rb', line 7

def eig
  @eig
end

#est ⇒ Object

Returns the value of attribute est.



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# File 'lib/ember_serialize.rb', line 7

def est
  @est
end

#extension ⇒ Object

Returns the value of attribute extension.



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# File 'lib/ember_serialize.rb', line 7

def extension
  @extension
end

#javascripts_dir ⇒ Object

Returns the value of attribute javascripts_dir.



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# File 'lib/ember_serialize.rb', line 7

def javascripts_dir
  @javascripts_dir
end

#missing ⇒ Object

Returns the value of attribute missing.



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# File 'lib/ember_serialize.rb', line 7

def missing
  @missing
end

#models_dir ⇒ Object

Returns the value of attribute models_dir.



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# File 'lib/ember_serialize.rb', line 7

def models_dir
  @models_dir
end

Instance Method Details

#camel(name) ⇒ Object 



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# File 'lib/ember_serialize.rb', line 60

def camel(name)
  name.to_s.underscore.camelize(:lower)
end

#detect_extension ⇒ Object 



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# File 'lib/ember_serialize.rb', line 56

def detect_extension
  Dir[@models_dir+"*js.em"].blank? ? ".js.coffee" : ".js.em"
end

#ember_app_name(javascripts_dir = @javascripts_dir) ⇒ Object 



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# File 'lib/ember_serialize.rb', line 64

def ember_app_name(javascripts_dir = @javascripts_dir)
  @app_name ||= begin
    appname = Dir[javascripts_dir+"*"].select do |f|
      File.file?(f)
    end.map do |f|
      open(f) do |f|
        f.each_line.detect do |l|
          /Ember.Application.create/.match(l)
        end
      end
    end.compact.first.strip.gsub /.*window\.(\w+) =.*$/, '\1'
  end
end

#ember_model(app_name, model, indent, extension) ⇒ Object 



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# File 'lib/ember_serialize.rb', line 78

def ember_model(app_name, model, indent, extension)
  klass = if extension == '.js.em'
    "class #{app_name}.#{model.name} extends DS.Model"
  else
    "#{app_name}.#{model.name} = DS.Model.extend"
  end
  lines = <<MODEL
# for more details see: http://emberjs.com/guides/models/defining-models/

#{klass}
#{indent}# ember_serialize:start
#{indent}# ember_serialize:end
MODEL
  lines.split /\n/
end

#ember_model_build(schema, model, args) ⇒ Object 



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# File 'lib/ember_serialize.rb', line 180

def ember_model_build(schema, model, args)
  return nil unless args && args.length == 8
  lines, line_start, line_end, existing, ignore, as_is, async, indent = args
  new_lines = []

  # build attributes
  schema[:attributes].each do |name,type|
    camel_name, line = if name =~ /_id$/ &&
        type == :integer &&
        !as_is.include?(name) &&
        !as_is.include?(camel(name))
      ember_reflect(model, name, :belongs_to, async, existing, indent, type)
    else
      ember_reflect(model, name, :attribute, async, existing, indent, type)
    end
    unless ignore.include? camel_name
      new_lines << line
    end
  end

  # build associations
  schema[:associations].each do |key, assoc|
    next if assoc.nil?
    rel, table = assoc.flatten
    camel_name, line = ember_reflect(model, table, rel, async, existing, indent)
    unless ignore.include? camel_name
      new_lines << line
    end
  end

  # build final content
  content = [ lines[0..line_start].join("\n") ]
  unless ignore.blank?
    content << "#{indent}# #{@eig} #{ignore.join(", ")}"
  end
  unless as_is.blank?
    content << "#{indent}# #{@eai} #{as_is.join(", ")}"
  end
  if async == false
    content << "#{indent}# #{@eas} false"
  end
  content << new_lines.join(",\n")
  content << lines[line_end..-1].join("\n")

  content.join("\n")
end

#ember_model_parse(ember_model_file, model) ⇒ Object 



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# File 'lib/ember_serialize.rb', line 123

def ember_model_parse(ember_model_file, model)
  if !File.exists? ember_model_file
    if @missing == :create
      # create default file
      lines = ember_model ember_app_name, model, "  ", @extension
    else
      return nil
    end
  else
    lines = File.readlines(ember_model_file).map(&:rstrip)
  end

  # find start/end markers
  line_start = lines.index {|l| l =~ /#{@est}/}
  line_end = lines.index {|l| l =~ /#{@een}/}

  if line_start && line_end
    # find settings for ignore, as_is, and async
    ignore = lines.grep(/#{@eig}/) do |l|
      l.gsub(/.*#{@eig} (.*)\s*$/, '\1').split(/\s*,\s*/)
    end.flatten.uniq.map {|t| camel(t)}
    as_is = lines.grep(/#{@eai}/) do |l|
      l.gsub(/.*#{@eai} (.*)\s*$/, '\1').split(/\s*,\s*/)
    end.flatten.uniq.map {|t| camel(t)}
    if @force_async.nil?
      async = lines.grep(/#{@eas}/) do |l|
        l.gsub(/.*#{@eai} (.*)\s*$/, '\1') == 'true'
      end.flatten.last
      async = true if async.nil?
    else
      async = @force_async
    end

    # match the indent of the start line
    indent = lines[line_start][/\A */]

    # catalog existing lines
    existing = {}
    lines.each_with_index do |line, i|
      next if line =~ /^\s*#/ # reject comments
      next unless line =~ /:\s*DS\./ #include DS lines
      # reformat the line
      name, ds = line.strip.gsub(/,$/,'').split(/:\s*/,2)
      name = camel name
      # save lines inside range as existing
      if i > line_start && i < line_end
        existing[name] = "#{indent}#{name}: #{ds}"
      else # ignore ones outside the range
        ignore << name
      end
    end
    [lines, line_start, line_end, existing, ignore.uniq, as_is, async, indent]
  else
    nil
  end
end

#ember_reflect(model, name, rel, async, existing, indent, type = 'string') ⇒ Object 



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# File 'lib/ember_serialize.rb', line 94

def ember_reflect(model, name, rel, async, existing, indent, type = 'string')
  foreign_name = name.to_s.gsub(/_id$/, '').to_sym
  _async = async ? ", {async: true}" : ''
  assoc = model.reflect_on_all_associations.select do |a|
    a.name == foreign_name && a.macro == rel.to_sym
  end.first
  camel_name = camel(name)
  line = if assoc
    if rel == :belongs_to || rel == :has_one
      camel_name = camel(foreign_name)
      if existing[camel_name].to_s =~ /belongsTo/
        existing[camel_name]
      else
        assoc_name = assoc.table_name.singularize
        "#{indent}#{camel_name}: DS.belongsTo('#{assoc_name}'#{_async})"
      end
    else
      if existing[camel_name].to_s =~ /hasMany/
        existing[camel_name]
      else
        "#{indent}#{camel_name}: DS.hasMany('#{camel_name}'#{_async})"
      end
    end
  else
    existing[camel_name] || "#{indent}#{camel_name}: DS.attr('#{type}')"
  end
  [camel_name, line]
end

#model_class(serializer) ⇒ Object 



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# File 'lib/ember_serialize.rb', line 227

def model_class(serializer)
  if serializer.respond_to? :model_class
    return serializer.model_class
  end
  @model_classes ||= Hash.new do |h,k|
    h[k] = k.name.gsub(/Serializer$/,'').constantize
  end
  @model_classes[serializer]
end

#schema(serializer) ⇒ Object 



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# File 'lib/ember_serialize.rb', line 237

def schema(serializer)
  if serializer.respond_to? :schema
    serializer.schema
  else 
    {}
  end
end

#serialize(match = nil) ⇒ Object 



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# File 'lib/ember_serialize.rb', line 37

def serialize(match = nil)
  # populate Rails descendants
  Rails.application.eager_load!

  # loop through serializers
  ActiveModel::Serializer.descendants.sort_by(&:name).each do |serializer|
    if match
      next unless serializer.name =~ /^#{match}/
    end
    schema = schema serializer
    model = model_class serializer
    ember_model_file = @models_dir + model.table_name.singularize + @extension
    new_content = ember_model_build(schema, model, ember_model_parse(ember_model_file, model))
    if new_content
      File.write ember_model_file, new_content
    end
  end
end