Class: Fit

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(io) ⇒ Fit

Returns a new instance of Fit.



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# File 'lib/fitreader/fit.rb', line 14

def initialize(io)
  @header = FileHeader.new(io)
  finished = []
  begin
    defs = {}
    dev_field_defs = {}
    # until (io.pos - 14) >= header.num_record_bytes
    until ((@header.num_record_bytes + 14) - io.pos) == 0
      h = RecordHeader.new(io)
      if h.definition?
        if h.has_dev_defs?
          d = DefinitionRecord.new(io, h.local_message_type, dev_field_defs)
        else
          d = DefinitionRecord.new(io, h.local_message_type)
        end
        finished << defs[d.local_num] if defs.key? d.local_num
        defs[d.local_num] = d
      elsif h.data?
        d = defs[h.local_message_type]
        data_record = DataRecord.new(io, d)
        if d.global_msg_num == 206
          dev_field = make_developer_fields(data_record.fields)
          dev_field_defs[dev_field[:dev_data_idx].raw] = dev_field
        else
          d.data_records << data_record
        end
      else
        # TODO implement timestamps
      end
    end
    finished.push(*defs.values)
    io.close
    @messages = finished.group_by(&:global_msg_num)
                        .map { |x| Message.new x }
                        .reject { |x| x.data.nil? }
  rescue => e
    puts "error: #{e}\n#{e.backtrace}"
  end
end

Instance Attribute Details

#header ⇒ Object (readonly)

Returns the value of attribute header.



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# File 'lib/fitreader/fit.rb', line 12

def header
  @header
end

#messages ⇒ Object (readonly)

Returns the value of attribute messages.



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# File 'lib/fitreader/fit.rb', line 12

def messages
  @messages
end

Instance Method Details

#digest ⇒ Object 



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# File 'lib/fitreader/fit.rb', line 54

def digest
  Hash[@messages.map { |x| [x.name, x.data.count] }]
end

#make_developer_fields(data_records) ⇒ Object 



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# File 'lib/fitreader/fit.rb', line 62

def make_developer_fields(data_records)
  lookup = {0 => :dev_data_idx, 1 => :field_def_num, 2 => :base_type_id, 3 => :field_name, 8 => :units}
  map = {}
  data_records.each do |k,v|
    key = lookup[k]
    map[key] = v
  end
  map
end

#type(name) ⇒ Object 



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# File 'lib/fitreader/fit.rb', line 58

def type(name)
  messages.find { |x| x.name == name }
end