Class: Coral::Util::Data

Inherits:
Object
  • Object
show all
Defined in:
lib/coral_core/util/data.rb

Class Method Summary collapse

Class Method Details

.array(data, default = [], split_string = false) ⇒ Object 



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# File 'lib/coral_core/util/data.rb', line 180

def self.array(data, default = [], split_string = false)
  result = default    
  if data
    case data
    when Array
      result = data
    when String
      result = [ ( split_string ? data.split(/\s*,\s*/) : data ) ]
    else
      result = [ data ]
    end
  end
  return result
end

.empty?(value) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/coral_core/util/data.rb', line 40

def self.empty?(value)
  if undef?(value) || false?(value) || (value.respond_to?('empty?') && value.empty?)
    return true
  end
  return false
end

.ensure(test, success_value = nil, failure_value = nil) ⇒ Object 



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# File 'lib/coral_core/util/data.rb', line 370

def self.ensure(test, success_value = nil, failure_value = nil)
  success_value = (success_value ? success_value : test)
  failure_value = (failure_value ? failure_value : nil)
    
  if empty?(test)
    value = failure_value
  else
    value = success_value
  end
  return value
end

.ensure_value(value, failure_value = nil) ⇒ Object 



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# File 'lib/coral_core/util/data.rb', line 384

def self.ensure_value(value, failure_value = nil)
  return self.ensure(value, nil, failure_value)
end

.exists?(data, keys, check_empty = false) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/coral_core/util/data.rb', line 49

def self.exists?(data, keys, check_empty = false)
  keys = [ keys ] unless keys.is_a?(Array)
  keys.each do |key|
    return false unless data.is_a?(Hash) && data.has_key?(key)
    return false if check_empty && empty?(data[key])
    data = data[key]
  end
  return true
end

.false?(value) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/coral_core/util/data.rb', line 30

def self.false?(value)
  if value == false || 
    (value.is_a?(String) && value.match(/^\s*(false|FALSE|False)\s*$/))
    return true
  end
  return false  
end

.filter(data, method = false) ⇒ Object 



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# File 'lib/coral_core/util/data.rb', line 170

def self.filter(data, method = false)
  if method && method.is_a?(Symbol) && 
    [ :array, :hash, :string, :symbol, :test ].include?(method.to_sym)
    return send(method, data)
  end
  return data
end

.hash(data, default = {}) ⇒ Object 



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# File 'lib/coral_core/util/data.rb', line 197

def self.hash(data, default = {})
  result = default    
  if data
    case data
    when Hash
      result = data
    else
      result = {}
    end
  end
  return result
end

.interpolate(value, scope, options = {}) ⇒ Object 



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# File 'lib/coral_core/util/data.rb', line 296

def self.interpolate(value, scope, options = {})    
  
  pattern = ( options.has_key?(:pattern) ? options[:pattern] : '\$(\{)?([a-zA-Z0-9\_\-]+)(\})?' )
  group   = ( options.has_key?(:var_group) ? options[:var_group] : 2 )
  flags   = ( options.has_key?(:flags) ? options[:flags] : '' )
  
  if scope.is_a?(Hash)
    regexp = Regexp.new(pattern, flags.split(''))
  
    replace = lambda do |item|
      matches = item.match(regexp)
      result  = nil
      
      #dbg(item, 'item')
      #dbg(matches, 'matches')
      
      unless matches.nil?
        replacement = scope.search(matches[group], options)
        result      = item.gsub(matches[0], replacement) unless replacement.nil?
      end
      return result
    end
    
    case value
    when String
      #dbg(value, 'interpolate (string) -> init')
      while (temp = replace.call(value))
        #dbg(temp, 'interpolate (string) -> replacement')
        value = temp
      end
      
    when Hash
      #dbg(value, 'interpolate (hash) -> init')
      value.each do |key, data|
        #dbg(data, "interpolate (#{key}) -> data")
        value[key] = interpolate(data, scope, options)
      end
    end
  end
  #dbg(value, 'interpolate -> result')
  return value  
end

.merge(data, force = true) ⇒ Object

Operations



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# File 'lib/coral_core/util/data.rb', line 252

def self.merge(data, force = true)
  value = data
  
  # Special case because this method is called from within Config.new so we 
  # can not use Config.ensure, as that would cause an infinite loop.
  force = force.is_a?(Coral::Config) ? force.get(:force, true) : force
  
  if data.is_a?(Array)
    value = undef?(data[0]) ? nil : data.shift.clone
    
    data.each do |item|
      item = undef?(item) ? nil : item.clone
      
      case value
      when Hash
        begin
          require 'deep_merge'
          value = force ? value.deep_merge!(item) : value.deep_merge(item)
          
        rescue LoadError
          if item.is_a?(Hash) # Non recursive top level by default.
            value = value.merge(item)              
          elsif force
            value = item
          end
        end  
      when Array
        if item.is_a?(Array)
          value = value.concat(item).uniq
        elsif force
          value = item
        end
              
      else
        value = item if force || item.is_a?(String) || item.is_a?(Symbol)
      end
    end  
  end
  
  return value
end

.parse_json(json_text) ⇒ Object 



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# File 'lib/coral_core/util/data.rb', line 96

def self.parse_json(json_text)
  output = ''
  begin
    output = MultiJson.load(json_text)
    
  rescue Exception
  end
  return output
end

.parse_yaml(yaml_text) ⇒ Object 



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# File 'lib/coral_core/util/data.rb', line 120

def self.parse_yaml(yaml_text)
  output = ''
  begin
    output = YAML.load(yaml_text)
    
  rescue Exception
  end
  return output  
end

.prefix(prefix, data) ⇒ Object

Utilities



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# File 'lib/coral_core/util/data.rb', line 342

def self.prefix(prefix, data)
  result = nil
  
  unless prefix.is_a?(String) && ! empty?(prefix)
    prefix = ''
  end
  
  case data
  when String, Symbol
    result = ( prefix.empty? ? data.to_s : prefix + '_' + data.to_s )
    
  when Array
    result = []
    data.each do |value|
      result << prefix(prefix, value)
    end
    
  when Hash
    result = {}
    data.each do |key, value|
      result[prefix(prefix, key)] = value  
    end      
  end
  return result
end

.string(data, default = '') ⇒ Object 



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# File 'lib/coral_core/util/data.rb', line 212

def self.string(data, default = '')
  result = default    
  if data
    case data
    when String
      result = data
    else
      result = data.to_s
    end
  end
  return result
end

.string_map(data) ⇒ Object 



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# File 'lib/coral_core/util/data.rb', line 79

def self.string_map(data)
  results = {}
  return data unless data
  
  case data
  when Hash
    data.each do |key, value|
      results[key.to_s] = string_map(value)
    end
  else
    results = data
  end    
  return results
end

.symbol(data, default = :undefined) ⇒ Object 



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# File 'lib/coral_core/util/data.rb', line 227

def self.symbol(data, default = :undefined)
  result = default    
  if data
    case data
    when Symbol
      result = data
    when String
      result = data.to_sym
    else
      result = data.class.to_sym
    end
  end
  return result
end

.symbol_map(data) ⇒ Object

Translation



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# File 'lib/coral_core/util/data.rb', line 62

def self.symbol_map(data)
  results = {}
  return data unless data
  
  case data
  when Hash
    data.each do |key, value|
      results[key.to_sym] = symbol_map(value)
    end
  else
    results = data
  end    
  return results
end

.test(data) ⇒ Object 



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# File 'lib/coral_core/util/data.rb', line 244

def self.test(data)
  return false if Util::Data.empty?(data)
  return true
end

.to_json(data, pretty = true) ⇒ Object 



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# File 'lib/coral_core/util/data.rb', line 108

def self.to_json(data, pretty = true)
  output = ''
  begin
    output = MultiJson.dump(data, :pretty => pretty)
    
  rescue Exception
  end
  return output
end

.to_yaml(data) ⇒ Object 



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# File 'lib/coral_core/util/data.rb', line 132

def self.to_yaml(data)
  output = ''
  begin
    output = YAML.dump(data)
    
  rescue Exception
  end
  return output
end

.true?(value) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/coral_core/util/data.rb', line 20

def self.true?(value)
  if value == true || 
    (value.is_a?(String) && value.match(/^\s*(true|TRUE|True)\s*$/))
    return true
  end
  return false  
end

.undef?(value) ⇒ Boolean

Type checking

Returns:

  • (Boolean) 


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# File 'lib/coral_core/util/data.rb', line 9

def self.undef?(value)
  if value.nil? || 
    (value.is_a?(Symbol) && value == :undef || value == :undefined) || 
    (value.is_a?(String) && value.match(/^\s*(undef|UNDEF|Undef|nil|NIL|Nil)\s*$/))
    return true
  end
  return false  
end

.value(value) ⇒ Object 



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# File 'lib/coral_core/util/data.rb', line 144

def self.value(value)
  case value
  when String
    if undef?(value)
      value = nil
    elsif true?(value)
      value = true
    elsif false?(value)
      value = false
    end
  
  when Array
    value.each_with_index do |item, index|
      value[index] = value(item)
    end
  
  when Hash
    value.each do |key, data|
      value[key] = value(data)
    end
  end
  return value  
end