Class: EventDb::EventReader

Inherits:
Object
  • Object
show all
Includes:
LogUtils::Logging
Defined in:
lib/eventdb/reader.rb

Defined Under Namespace

Classes: Event

Constant Summary collapse

MONTH_EN_TO_MM = 
{
'Jan' => '1',
'Feb' => '2',
'Mar' => '3', 'March' => '3',
'Apr' => '4', 'April' => '4',
'May' => '5',
'Jun' => '6', 'June' => '6',
'Jul' => '7', 'July' => '7',
'Aug' => '8',
'Sep' => '9', 'Sept' => '9',
'Oct' => '10',
'Nov' => '11',
'Dec' => '12' }
MONTH_EN =

e.g. ‘Jan|Feb|March|Mar|…’

MONTH_EN_TO_MM.keys.join('|')
DATE_ENTRY_REGEX =

examples:

  • 2015 @ Salzburg, Austria; Oct/17+18

  • 2015 @ Brussels / Brussel / Bruxelles; Jan/31+Feb/1

  • 2014 @ Porto de Galinhas, Pernambuco; Apr/24-27 (formerly: Abril Pro Ruby)

/\s+
(?<year>201\d)   ## year
\s+
 @            ## at location
\s+
[^;]+        ##  use ; as separator between place and date
;
\s+
(?<start_month_en>#{MONTH_EN})
\/
(?<start_day>[0-9]{1,2})          ## start date
(?:
  [+\-]     ## use + for two days, - for more than two days
  (?:
    (?<end_month_en>#{MONTH_EN})
    \/
  )?   ## optional end_month
  (?<end_day>[0-9]{1,2})
)? ## optional end_date
/x
LINK_ENTRY_REGEX =

example:

/\s+
  \[
    [^\]]+
  \]
  \(
   [^\)]+
  \)
/x

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(text) ⇒ EventReader

Returns a new instance of EventReader.



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# File 'lib/eventdb/reader.rb', line 28

def initialize( text )
  @text = text
end

Class Method Details

.from_file(path) ⇒ Object 



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# File 'lib/eventdb/reader.rb', line 19

def self.from_file( path )
  self.from_string( File.read_utf8( path ) )
end

.from_string(text) ⇒ Object 



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# File 'lib/eventdb/reader.rb', line 23

def self.from_string( text )
  self.new( text )
end

.from_url(src) ⇒ Object

note: src assumed a string



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# File 'lib/eventdb/reader.rb', line 14

def self.from_url( src )   # note: src assumed a string
  worker = Fetcher::Worker.new
  self.from_string( worker.read_utf8!( src ) )
end

Instance Method Details

#read ⇒ Object 



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# File 'lib/eventdb/reader.rb', line 88

def read

  events = []
  stack  = []   ## header/heading stack;  note: last_stack is stack.size; starts w/ 0

  last_link_entry = nil

  # note: cut out; remove all html comments e.g. <!-- -->
  #   supports multi-line comments too (e.g. uses /m - make dot match newlines)
  text = @text.gsub( /<!--.+?-->/m, '' )  ## todo/fix: track/log cut out comments!!!

  text.each_line do |line|

    logger.debug "line: >#{line}<"
    line = line.rstrip  ## remove (possible) trailing newline

    break if line =~ /^## More/   #  stop when hitting >## More< section
    next  if line =~ /^\s*$/      #  skip blank lines

    m = nil
    if line =~ /^[ ]*(#+)[ ]+/    ## heading/headers - note: must escpape #
        s = StringScanner.new( line )
        s.skip( /[ ]*/ )  ## skip whitespaces
        markers = s.scan( /#+/)
        level   = markers.size
        s.skip( /[ ]*/ )  ## skip whitespaces
        title   = s.rest.rstrip
        
        logger.debug " heading level: #{level}, title: >#{title}<"

        level_diff = level - stack.size

        if level_diff > 0
          logger.debug "[EventReader]    up  +#{level_diff}"
          if level_diff > 1
            logger.error "fatal: level step must be one (+1) is +#{level_diff}"
            fail "[EventReader] level step must be one (+1) is +#{level_diff}"
          end
        elsif level_diff < 0
          logger.debug "[EventReader]    down #{level_diff}"
          level_diff.abs.times { stack.pop }
          stack.pop
        else
          ## same level
          stack.pop
        end
        stack.push( [level,title] )
        logger.debug "  stack: #{stack.inspect}"

    elsif line =~ /^[ ]*-[ ]+/     ## list item
      if( m=LINK_ENTRY_REGEX.match( line ) )
        logger.debug " link entry: #{line}"

        s = StringScanner.new( line )
        s.skip( /[ ]*-[ ]*/ )  ## skip leading list
        last_link_entry = s.rest.rstrip  ## remove trailing spaces to
      elsif( m=DATE_ENTRY_REGEX.match( line ) )
        year           = m[:year]
        
        start_month_en = m[:start_month_en]
        start_day      = m[:start_day]

        start_month    = MONTH_EN_TO_MM[ start_month_en ]
        start_date = Date.new( year.to_i, start_month.to_i, start_day.to_i )


        end_month_en   = m[:end_month_en]
        end_month_en    = start_month_en    if end_month_en.nil? # no end month; use same as start

        end_day        = m[:end_day]
        end_day        = start_day   if end_day.nil?  # no end day; single day event (use start day)

        end_month     = MONTH_EN_TO_MM[ end_month_en ]
        end_date = Date.new( year.to_i, end_month.to_i, end_day.to_i )

        ## pp start_date

        logger.debug " date entry: #{line}"
        logger.debug "   start_date: #{start_date}, year: #{year}, start_month_en: #{start_month_en}, start_month: #{start_month} start_day: #{start_day} => #{last_link_entry}"
        logger.debug "   end_date: #{end_date}, end_month_en: #{end_month_en}, end_day_en: #{end_day}"


        s = StringScanner.new( line )
        s.skip( /[ ]*-[ ]*/ )  ## skip leading list
        s.skip_until( /@/ )

        place = s.scan( /[^;]+/ ) ## get place (everything until ; (separator))
        place = place.strip          
        logger.debug "  place: #{place}, rest: >#{s.rest}<"

        ## note: cut of heading 1 (e.g. awesome-events title)
        more_places = stack[1..-1].reverse.map {|it| it[1] }.join(' › ')
        place = "#{place} › #{more_places}"
        logger.debug "  place: #{place}"

        s.skip( /;/ )
        s.skip( /[ ]*/ ) ## skip whitespaces
        date  = s.scan( /[^ ]+/ ) # e.g. everything untils first space (or end-of-line)

        title = last_link_entry

        event = Event.new( title, place, date, start_date, end_date )
        ## pp event
        events << event
      else
        logger.debug "  *** skip list item line: #{line}"
      end
    else
      logger.debug "  *** skip line: #{line}"
    end
  end
  
  events
end