Class: RisReader

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

Overview

Several utilities to work with PubMed API

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(string) ⇒ RisReader

Returns a new instance of RisReader.



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# File 'lib/ris_reader.rb', line 32

def initialize(string)
  @string=string

  @errors=[]
  if @string.length>3 and @string.bytes[0..2]==[239,187,191]
    @string=@string[1..-1]
  end
  @records=[]
end

Instance Attribute Details

#records ⇒ Object (readonly)

Returns the value of attribute records.



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# File 'lib/ris_reader.rb', line 31

def records
  @records
end

Instance Method Details

#process ⇒ Object 



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# File 'lib/ris_reader.rb', line 43

def process
  current_record={}
  ris_pattern = /^(?<tag>[A-Z][A-Z0-9])\s{0,2}-\s{0,2}(?<value>.*)$/

  # WoS RIS is savage. Both \r and \n are used.
  # No point in be civilized
  lines=@string.split(/[\r\n]+/)
  i=0
  @string.each_line do |line|

    line.strip!
    next if line==""
    #puts line.inspect
    # Match the pattern against the RIS line
    match = line.match(ris_pattern)
    # Access the tag and value using named capture groups
    if match
      tag = match[:tag]
      value = match[:value].strip
      if tag=="ER"
        @records.push(current_record.dup)
        current_record={}
      else
        if current_record.has_key? tag
          if current_record[tag].is_a? Array
            current_record[tag].push(value)
          else
            current_record[tag]=[current_record[tag], value]
          end
        else
          current_record[tag]=value
        end
      end
    elsif line=~/(^.+):(.+)$/
      current_record[$1]=$2.strip
    else
      #puts "****"
      #hex_codes = line.bytes.map { |b| sprintf("%02X", b) }.join
      #puts hex_codes
      #puts  match.inspect
      #puts line.inspect
      #raise "ERROR"
      @errors.push({line_number:i, text:line})
    end
    i+=1
  end
end