Class: ChartJS::EventStream

Inherits:
Object
  • Object
show all
Defined in:
lib/chart_js/chart/event_stream.rb

Instance Method Summary collapse

Constructor Details

#initialize(path, chart) ⇒ EventStream

Returns a new instance of EventStream.



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# File 'lib/chart_js/chart/event_stream.rb', line 49

def initialize(path, chart)
    @push = nil
    chart(chart)
	path(path)
    build(block) if block_given?
end

Instance Method Details

#build(&block) ⇒ Object 



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# File 'lib/chart_js/chart/event_stream.rb', line 56

def build(&block)
			instance_eval(&block)
  self
end

#chart(chart_obj = nil) ⇒ Object 



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# File 'lib/chart_js/chart/event_stream.rb', line 44

def chart(chart_obj = nil)
  return @chart if chart_obj.nil?
  @chart = chart_obj
end

#counter(dataset:, chart: @chart, counter: "counter") ⇒ Object 



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# File 'lib/chart_js/chart/event_stream.rb', line 38

def counter(dataset:, chart: @chart, counter: "counter")
  str = ""
  str << "var #{counter} = 0;\n"
			str << "source.onmessage = function(e) { #{counter} += 1 };\n"
end

#path(value = nil) ⇒ Object 



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# File 'lib/chart_js/chart/event_stream.rb', line 61

def path(value = nil)
	return @path if value.nil?
	@path = value
end

#push(dataset: 0, chart: @chart, &block) ⇒ Object 



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# File 'lib/chart_js/chart/event_stream.rb', line 19

def push(dataset: 0, chart: @chart, &block)
  @push = EventStreams.push(dataset: dataset, chart: @chart, &block)
end

#raw(chart: @chart, str: nil, file: nil, without_source: true, update: true) ⇒ Object

end



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# File 'lib/chart_js/chart/event_stream.rb', line 28

def raw(chart: @chart, str: nil, file: nil, without_source: true, update: true)
  @raw = ""
  @raw = @raw + "source.onmessage = function(e) { json = JSON.parse(e.data);"
  return @raw if str.nil? and file.nil?
  @raw = @raw + str unless str.nil?
  @raw = @raw + File.readlines(file) unless file.nil?
  @rar = @raw + "#{chart}.update();" if update
  @raw = @raw + "};"
end

#to_html(source: @path, chart: @chart) ⇒ Object 



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# File 'lib/chart_js/chart/event_stream.rb', line 7

def to_html(source: @path, chart: @chart)
	str = ""
    str << "<script>\n"
    str << "var source = new EventSource('#{path}');\n"
    str << "var json;\n"
    str << @counter if @counter
    str << @push.to_s if @push
  str << @pop     if @pop
    str << @raw     if @raw
    str << "</script>\n"
end