Class: Icalendar::Parser

Inherits:
Base show all
Defined in:
lib/icalendar/parser.rb

Constant Summary collapse

DATE =

date = date-fullyear [“-”] date-month [“-”] date-mday date-fullyear = 4 DIGIT date-month = 2 DIGIT date-mday = 2 DIGIT

'(\d\d\d\d)-?(\d\d)-?(\d\d)'
TIME =

time = time-hour [“:”] time-minute [“:”] time-second [time-secfrac] [time-zone] time-hour = 2 DIGIT time-minute = 2 DIGIT time-second = 2 DIGIT time-secfrac = “,” 1*DIGIT time-zone = “Z” / time-numzone time-numzome = sign time-hour [“:”] time-minute

'(\d\d):?(\d\d):?(\d\d)(\.\d+)?(Z|[-+]\d\d:?\d\d)?'

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Base

debug, quiet

Constructor Details

#initialize(src, strict = true) ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/icalendar/parser.rb', line 45

def initialize(src, strict = true)
  # Setup the parser method hash table
  setup_parsers

  # The default behavior is to raise an error when the parser
  # finds an unknown property. Set this to false to discard
  # unknown properties instead of raising an error.
  @strict = strict

  if src.respond_to?(:gets)
    @file = src
  elsif (not src.nil?) and src.respond_to?(:to_s)
    @file = StringIO.new(src.to_s, 'r')
  else
    raise ArgumentError, "CalendarParser.new cannot be called with a #{src.class} type!"
  end

  @prev_line = @file.gets
  @prev_line.chomp! unless @prev_line.nil?

  @@logger.debug("New Calendar Parser: #{@file.inspect}")
end

Instance Attribute Details

#strict ⇒ Object

Defines if this is a strict parser.



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# File 'lib/icalendar/parser.rb', line 43

def strict
  @strict
end

Instance Method Details

#next_line ⇒ Object

Define next line for an IO object. Works for strings now with StringIO



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# File 'lib/icalendar/parser.rb', line 70

def next_line
  line = @prev_line

  if line.nil? 
    return nil 
  end

  # Loop through until we get to a non-continuation line...
  loop do
    nextLine = @file.gets
    @@logger.debug "new_line: #{nextLine}"

    if !nextLine.nil?
      nextLine.chomp!
    end

    # If it's a continuation line, add it to the last.
    # If it's an empty line, drop it from the input.
    if( nextLine =~ /^[ \t]/ )
      line << nextLine[1, nextLine.size]
    elsif( nextLine =~ /^$/ )
    else
      @prev_line = nextLine
      break
    end
  end
  line
end

#parse ⇒ Object

Parse the calendar into an object representation



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# File 'lib/icalendar/parser.rb', line 100

def parse
  calendars = []

  @@logger.debug "parsing..."
  # Outer loop for Calendar objects
  while (line = next_line) 
    fields = parse_line(line)

    # Just iterate through until we find the beginning of a calendar object
    if fields[:name] == "BEGIN" and fields[:value] == "VCALENDAR"
      cal = parse_component Calendar.new
      @@logger.debug "Added parsed calendar..."
      calendars << cal
    end
  end

  calendars
end