Class: QueryDef

Inherits:
Object
  • Object
show all
Defined in:
lib/cuca/stdlib/listwidget/querydef.rb

Overview

QueryDef is a settings class that hold the settings for the query for listwidget

FIXME: Change name or put into namespace

Constant Summary collapse

ATTRIBS = 
['order_by', 'order','range', 'filters']
ATTRIBS_ENCODE = 
{ 
  'range' => 
  Proc.new do |e| 
    "#{e.first}-#{e.last}" 
  end,
 'filters' => 
  Proc.new do |e|  
    s = ''; 
    e.each_pair { |k,v| s << "#{k}:#{v};" }; 
    s 
  end,
  'order' => 
  Proc.new do |e|
    ['ASC', 'DESC'].include?(e) ? e : 'ASC'
  end
}
ATTRIBS_DECODE = 
{
   'range' => 
   Proc.new do |e| 
      Range.new(e.split('-')[0].to_i,e.split('-')[1].to_i) 
   end,
   'filters' => 
   Proc.new do |e| 
      h = {}
      e.split(';').each do |p|
           vals = p.split(':')
           h[vals[0]] = vals[1] if (vals.size == 2)
      end
   h
   end,
   'order' => 
    Proc.new do |e|
      ['ASC', 'DESC'].include?(e) ? e : 'ASC'
    end
}
ATTRIBS_DEFAULTS = 
{ 'range' => 0..9,
'order_by' => '',
'order' => 'ASC',
'filters' => {} }

Instance Method Summary collapse

Constructor Details

#initialize(list_name) ⇒ QueryDef

Returns a new instance of QueryDef.



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# File 'lib/cuca/stdlib/listwidget/querydef.rb', line 165

def initialize(list_name)
 @list_name = list_name 
 @data = {}
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(m, *params) ⇒ Object

Raises:

  • (NoMethodError) 


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# File 'lib/cuca/stdlib/listwidget/querydef.rb', line 61

def method_missing(m, *params)
  met = m.id2name

  #getter 
  if (ATTRIBS.include?(met)) then
    return @data[met] || ATTRIBS_DEFAULTS[met].dup
  end

  #setter
  raise NoMethodError if met[met.size-1].chr != '='
  raise NoMethodError if params.size != 1
  met = met[0..met.size-2]		# cut '='
  if ATTRIBS.include?(met) then
    @data[met] = params[0]
  else
    raise NoMethodError
  end
end

Instance Method Details

#at_dec(name) ⇒ Object 



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# File 'lib/cuca/stdlib/listwidget/querydef.rb', line 109

def at_dec(name)
   name[@list_name.size..@name.size-1]
end

#at_enc(name) ⇒ Object

attribute-name enc/dec



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# File 'lib/cuca/stdlib/listwidget/querydef.rb', line 105

def at_enc(name)
  "#{@list_name}_#{name}"
end

#escape(string) ⇒ Object

take from CGI class



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# File 'lib/cuca/stdlib/listwidget/querydef.rb', line 50

def escape(string)
    string.gsub(/([^ a-zA-Z0-9_.-]+)/n) do
     '%' + $1.unpack('H2' * $1.size).join('%').upcase
   end.tr(' ', '+')
end

#ev_dec(name, value) ⇒ Object 



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# File 'lib/cuca/stdlib/listwidget/querydef.rb', line 90

def ev_dec(name, value)
  if ATTRIBS_DECODE.has_key?(name) then
#     $stderr.puts "ev_dec #{name} #{value}"
    begin
       return ATTRIBS_DECODE[name].call(value)
    rescue
#        $stderr.puts "Decoding failed: #{name} - #{value}: #{$!}"
       return ATTRIBS_DEFAULTS[name].dup
    end
  else
    return value
  end
end

#ev_enc(name) ⇒ Object

value enc/dec



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# File 'lib/cuca/stdlib/listwidget/querydef.rb', line 81

def ev_enc(name)
#   $stderr.puts "env_enc(#{name}) #{@data.inspect}"
  if ATTRIBS_ENCODE.has_key?(name) then
    ATTRIBS_ENCODE[name].call(@data[name] || '')
  else
    @data[name]
  end
end

#from_params(params) ⇒ Object 



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# File 'lib/cuca/stdlib/listwidget/querydef.rb', line 133

def from_params(params)
#   $stderr.puts "CGI PARAMS: #{$cgi.params.inspect}"
#   $stderr.puts "*** From Params\n #{params.inspect}\n"
#   $stderr.puts "*** DEFAULT ATTR: #{ATTRIBS_DEFAULTS.inspect}\n"
  ATTRIBS.each do |a|
#     $stderr.puts "Checking: #{at_enc(a)} = #{params[at_enc(a)][0]}"
    v = params[at_enc(a)]
    if v then 
      @data[a] = ev_dec(a,v)
    else
      @data[a] = ATTRIBS_DEFAULTS[a].dup
    end
#     $stderr.puts "\n*** ENDFROM_PARAMS: #{@data.inspect}"
  end

  # checking on filters that come by post
#   $stderr.puts "PARAMS: #{params.inspect}"
  params.each_pair do |p,v|
     if p.include?("#{@list_name}_filter_") then
        @data['filters'] ||= {}
        fname = p.scan(/\_filter\_(.*)/)[0][0]
        fdata = v
        @data['filters'][fname] = fdata
#         $stderr.puts "Filter update: #{@data['filters'].inspect}"
     end
  end

 
#   $stderr.puts @data.to_yaml
  return self
end

#to_h(attr = nil, newval = nil, attr2 = nil, newval2 = nil) ⇒ Object

returns an hash with the values and escaped names and attributes attr and newval with swap a value for this return without changing the actual data



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# File 'lib/cuca/stdlib/listwidget/querydef.rb', line 115

def to_h(attr=nil, newval=nil, attr2=nil, newval2=nil)
  if attr then
     @backup = @data.dup
     @data[attr] = newval
     @data[attr2] = newval2 unless attr2.nil?
  end

  u = {}
  ATTRIBS.each do |a|
#      $stderr.puts "Encoding: #{a} - #{@data[a]}"
     u[at_enc(a)] = escape(ev_enc(a) || '')
  end
  
  if attr then @data = @backup end

  return u
end

#unescape(string) ⇒ Object 



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# File 'lib/cuca/stdlib/listwidget/querydef.rb', line 55

def unescape(string)
   string.tr('+', ' ').gsub(/((?:%[0-9a-fA-F]{2})+)/n) do
     [$1.delete('%')].pack('H*')
   end
end