Class: Journaltxt::Parser

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

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(text) ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/journaltxt/parser.rb', line 11

def initialize( text )
  @text = text
end

Class Method Details

.parse(text) ⇒ Object

convenience helper



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# File 'lib/journaltxt/parser.rb', line 7

def self.parse( text )   ## convenience helper
  self.new( text ).parse
end

Instance Method Details

#parse ⇒ Object 



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# File 'lib/journaltxt/parser.rb', line 15

def parse

  puts ":: Text :::::::::::::::::::::"
  puts @text

  ## allow trailing spaces for now
  ##  - allow leadin spaces too - why? why not?

  ## remove leading 1st separator --- first
  text = @text.sub( /^---[ ]*$\n?/, '' )
  b = text.split( /^---[ ]*$\n?/ )

  items = b.each_slice(2).to_a


  ## process meta data blocks convert to hash via yaml

  ##
  ## todo: check for required entries
  ##
  ##   first entry needs/requires:
  ##      year/month/day
  ##   all others requireÖ
  ##      day

  last_page_date = nil

  items = items.each_with_index.map do |item,i|
    page_meta   = YAML.load( item[0] )  ## convert to hash (from yaml text)
    pp page_meta
    page_content = item[1]

    ## remove all (short-cut) date entries
    year  = page_meta.delete( 'year' )
    month = page_meta.delete( 'month' )
    day   = page_meta.delete( 'day' )

    puts "  year: >#{year}< : #{year.class.name}, month: >#{month}< : #{month.class.name}, day: >#{day}< : #{day.class.name}"

    ## convert all date entries to ints
    ##   lets us handle day => Sun 23 etc.

    ##  note: assume year is always a number
    if year.nil?
       if last_page_date
         year = last_page_date.year
       else
         ### fix/todo: throw format/parse exception!!
         puts "** year entry required / expected for first entry / meta data block"
         exit 1
       end
    end


    if day && day.is_a?(String)
       puts "  trying to convert day to int..."
       nums_day = day.scan( /[0-9]+/ )   ## returns array e.g. ['12']
       day = nums_day[0].to_i
       puts "  day:   >#{day}< : #{day.class.name}"
    end

    if day.nil?   ### fix/add - check if day >0 and< 31 why? why not??
      ### fix/todo: throw format/parse exception!!
      puts "** day entry required in meta data block"
      exit 1
    end


    if month && month.is_a?(String)
      puts "  trying to convert month to int..."
      ## for now let stdlib handle conversion
      ##   supports abbreviated names (e.g. Jan) and full names (e.g. January)

      ## todo/fix: check what happens if montn is invalid/unknow
      ##    returns nil? throws exception?
      date_month = Date.parse( "#{year}/#{month}/#{day}" )
      month = date_month.month
      puts "  month: >#{month}< : #{month.class.name}"
    end

    if month.nil?
      if last_page_date
        month = last_page_date.month
      else
        ### fix/todo: throw format/parse exception!!
        puts "** month entry required for first entry / meta data block"
        exit 1
      end
    end


    page_date = Date.new( year, month, day )
    last_page_date = page_date

    ## todo:check if date exists? possible?
    ##     issue warning or something - will get replaced - why? why not?
    page_meta['date']  = page_date

    ## pp YAML.dump( h )

    [page_meta, page_content]
  end
  items
end