Module: MongoStash

Defined in:
lib/mongo_stash.rb

Defined Under Namespace

Modules: ClassMethods

Class Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Class Attribute Details

.classes ⇒ Object

Returns the value of attribute classes.



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# File 'lib/mongo_stash.rb', line 114

def classes
  @classes
end

Class Method Details

.all_after_stash ⇒ Object 



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# File 'lib/mongo_stash.rb', line 117

def all_after_stash
  MongoStash.classes.each do |m|
	  m.all_after_stash
	end
end

.all_fix_dots_in_keys(for_real = false) ⇒ Object 



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# File 'lib/mongo_stash.rb', line 147

def all_fix_dots_in_keys(for_real=false)
  MongoStash.classes.each do |c|
    MongoStash.fix_dots_in_keys(c, for_real)
  end
end

.fix_dots_in_keys(c, for_real = false) ⇒ Object 



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

def fix_dots_in_keys(c, for_real=false)
  puts "\n#{c}" unless for_real
  selection = c.schema.select{|k,v| v[:type]==:attachment }
  img_keys = selection.respond_to?(:keys) ? selection.keys : selection.map{|a|a[0]}
  c.find({}, {:fields=>img_keys}).each do |e|
    old_hash = e.doc.select{|k,v| img_keys.include?(k) }
    fixed_hash = Marshal.load(Marshal.dump(old_hash))
    img_keys.each do |k|
      (fixed_hash[k]||{}).keys.each do |style|
        fixed_hash[k][style.tr('.','_')] = fixed_hash[k].delete(style)
      end
    end
    next if old_hash==fixed_hash
    
    if for_real
      c.collection.update({'_id'=>e.id}, {'$set'=>fixed_hash})
    else
      puts old_hash.inspect
      puts fixed_hash.inspect
    end
    
  end
end

.included(base) ⇒ Object 



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

def self.included(base)
  MongoStash.classes << base
  base.extend(ClassMethods)
	base.gridfs = GRID
end

Instance Method Details

#after_delete ⇒ Object 



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# File 'lib/mongo_stash.rb', line 59

def after_delete
  super
   model.schema.each do |k,v|
	  delete_files_for(k) if v[:type]==:attachment
	end
end

#after_save ⇒ Object 



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# File 'lib/mongo_stash.rb', line 66

def after_save
  super
	unless @temp_attachments.nil?
		@temp_attachments.each do |k,v|
			after_stash(k)
		end
	end
end

#after_stash(col) ⇒ Object 



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# File 'lib/mongo_stash.rb', line 75

def after_stash(col); end

#build_image_tag(col = 'image', style = 'original', html_attributes = {}) ⇒ Object 



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# File 'lib/mongo_stash.rb', line 25

def build_image_tag(col='image', style='original', html_attributes={})
  return '' if @doc[col].nil?||@doc[col][style].nil?
  title_field, alt_field = col+'_tooltip', col+'_alternative_text'
	title = @doc[title_field] if model.schema.keys.include?(title_field)
	alt = @doc[alt_field] if model.schema.keys.include?(alt_field)
	html_attributes = {:src => "/gridfs/#{@doc[col][style]}", :title => title, :alt => alt}.update(html_attributes)
	html_attributes = html_attributes.map do |k,v|
	  %{#{k}="#{model.html_escape(v.to_s)}"}
	end.join(' ')
  "<img #{html_attributes} />"
end

#convert(col, convert_steps, style) ⇒ Object 



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# File 'lib/mongo_stash.rb', line 77

def convert(col, convert_steps, style)
  return if @doc[col].nil?
  if @temp_attachments.nil? || @temp_attachments[col].nil?
    f = model.gridfs.get(@doc[col]['original'])
    return unless f.content_type[/^image\//]
    src = Tempfile.new('MongoStash_src')
    src.binmode
    src.write(f.read(4096)) until f.eof?
    src.close
    @temp_attachments ||= {}
    @temp_attachments[col] ||= {}
    @temp_attachments[col][:tempfile] = src
    @temp_attachments[col][:type] = f.content_type
	else
	  return unless @temp_attachments[col][:type][/^image\//]
	  src = @temp_attachments[col][:tempfile]
	end
  model.gridfs.delete(@doc[col][style]) unless @doc[col][style].nil?
	ext = style[/[a-zA-Z]+$/].insert(0,'.')
   content_type = Rack::Mime.mime_type(ext) 
   unless content_type[/^image\//]
     ext = '.jpg'
     content_type = 'image/jpeg'
   end
	dest = Tempfile.new(['MongoStash_dest', ext])
	dest.binmode
	dest.close
  system "convert \"#{src.path}\" #{convert_steps} \"#{dest.path}\""
	filename = "#{model.name}/#{self.id}/#{style}"
	attachment_id = model.gridfs.put(dest.open, {:filename=>filename, :content_type=>content_type})
   @doc[col] = @doc[col].update({style=>attachment_id})
	model.collection.update({'_id'=>@doc['_id']}, @doc)
	#src.close!
	dest.close!
end

#delete_files_for(col) ⇒ Object 



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# File 'lib/mongo_stash.rb', line 50

def delete_files_for(col)
  obj = (@old_doc||@doc)[col]
	if obj.respond_to?(:each)
	  obj.each do |k,v|
		  model.gridfs.delete(v)
		end
	end
end

#fix_type_attachment(k, v) ⇒ Object 



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

def fix_type_attachment(k,v)
  if v=='nil'
     delete_files_for(k) unless new?
		@doc[k] = nil
  elsif v.is_a?(Hash)&&v.key?(:tempfile)
	  delete_files_for(k) unless new?
		@temp_attachments ||= {}
		@temp_attachments[k] = v
     attachment_id = model.gridfs.put(v[:tempfile], {:filename=>v[:filename], :content_type=>v[:type]})
		@doc[k] = {'original'=>attachment_id}
	end
end