class Icalendar::Parser

Constants

BAD_LINE
LINE
NAME
PARAM
PTEXT
PVALUE
QSTR
VALUE

Attributes

source[R]
strict[R]

Public Class Methods

new(source, strict = false) click to toggle source
# File lib/icalendar/parser.rb, line 7
def initialize(source, strict = false)
  if source.respond_to? :gets
    @source = source
  elsif source.respond_to? :to_s
    @source = StringIO.new source.to_s, 'r'
  else
    msg = 'Icalendar::Parser.new must be called with a String or IO object'
    Icalendar.fatal msg
    fail ArgumentError, msg
  end
  read_in_data
  @strict = strict
end

Public Instance Methods

get_wrapper_class(component, fields) click to toggle source
# File lib/icalendar/parser.rb, line 72
def get_wrapper_class(component, fields)
  klass = component.class.default_property_types[fields[:name]]
  if !fields[:params]['value'].nil?
    klass_name = fields[:params].delete('value').first
    unless klass_name.upcase == klass.value_type
      klass_name = klass_name.downcase.gsub(/(?:\A|-)(.)/) { |m| m[-1].upcase }
      klass = Icalendar::Values.const_get klass_name if Icalendar::Values.const_defined?(klass_name)
    end
  end
  klass
end
parse() click to toggle source
# File lib/icalendar/parser.rb, line 21
def parse
  source.rewind
  read_in_data
  calendars = []
  while (fields = next_fields)
    if fields[:name] == 'begin' && fields[:value].downcase == 'vcalendar'
      calendars << parse_component(Calendar.new)
    end
  end
  calendars
end
parse_property(component, fields = nil) click to toggle source
# File lib/icalendar/parser.rb, line 33
def parse_property(component, fields = nil)
  fields = next_fields if fields.nil?
  prop_value = wrap_property_value component, fields
  prop_name = %w(class method).include?(fields[:name]) ? "ip_#{fields[:name]}" : fields[:name]
  begin
    method_name = if component.class.multiple_properties.include? prop_name
      "append_#{prop_name}"
    else
      "#{prop_name}="
    end
    component.send method_name, prop_value
  rescue NoMethodError => nme
    if strict?
      Icalendar.logger.error "No method \"#{method_name}\" for component #{component}"
      raise nme
    else
      Icalendar.logger.warn "No method \"#{method_name}\" for component #{component}. Appending to custom."
      component.append_custom_property prop_name, prop_value
    end
  end
end
strict?() click to toggle source
# File lib/icalendar/parser.rb, line 84
def strict?
  !!@strict
end
wrap_property_value(component, fields) click to toggle source
# File lib/icalendar/parser.rb, line 55
def wrap_property_value(component, fields)
  klass = get_wrapper_class component, fields
  if klass.value_type != 'RECUR' && fields[:value] =~ /(?<!\)([,;])/
    delimiter = $1
    Icalendar::Values::Array.new fields[:value].split(/(?<!\)[;,]/),
                                 klass,
                                 fields[:params],
                                 delimiter: delimiter
  else
    klass.new fields[:value], fields[:params]
  end
rescue Icalendar::Values::DateTime::FormatError => fe
  raise fe if strict?
  fields[:params]['value'] = ['DATE']
  retry
end

Private Instance Methods

next_fields() click to toggle source
# File lib/icalendar/parser.rb, line 115
def next_fields
  line = @data or return nil
  loop do
    read_in_data
    if @data =~ /\A[ \t].+\z/
      line << @data[1, @data.size]
    elsif @data !~ /\A\s*\z/
      break
    end
  end
  parse_fields line
end
parse_component(component) click to toggle source
# File lib/icalendar/parser.rb, line 90
def parse_component(component)
  while (fields = next_fields)
    if fields[:name] == 'end'
      break
    elsif fields[:name] == 'begin'
      klass_name = fields[:value].gsub(/\AV/, '').downcase.capitalize
      Icalendar.logger.debug "Adding component #{klass_name}"
      if Icalendar.const_defined? klass_name
        component.add_component parse_component(Icalendar.const_get(klass_name).new)
      elsif Icalendar::Timezone.const_defined? klass_name
        component.add_component parse_component(Icalendar::Timezone.const_get(klass_name).new)
      else
        component.add_component parse_component(Component.new klass_name.downcase, fields[:value])
      end
    else
      parse_property component, fields
    end
  end
  component
end
parse_fields(input) click to toggle source
# File lib/icalendar/parser.rb, line 137
def parse_fields(input)
  if parts = %r{#{LINE}}.match(input)
    value = parts[:value]
  else
    parts = %r{#{BAD_LINE}}.match(input) unless strict?
    parts or fail "Invalid iCalendar input line: #{input}"
    # Non-strict and bad line so use a value of empty string
    value = ''
  end

  params = {}
  parts[:params].scan %r{#{PARAM}} do |match|
    param_name = match[0].downcase
    params[param_name] ||= []
    match[1].scan %r{#{PVALUE}} do |param_value|
      params[param_name] << param_value.gsub(/\A"|"\z/, '') if param_value.size > 0
    end
  end
  Icalendar.logger.debug "Found fields: #{parts.inspect} with params: #{params.inspect}"
  {
    name: parts[:name].downcase.gsub('-', '_'),
    params: params,
    value: value
  }
end
read_in_data() click to toggle source
# File lib/icalendar/parser.rb, line 111
def read_in_data
  @data = source.gets and @data.chomp!
end