Class: Sinatra::ParamChecker::ParamScope

Inherits:
Object
  • Object
show all
Defined in:
lib/sinatra/param_checker.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ParamScope

Returns a new instance of ParamScope.



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# File 'lib/sinatra/param_checker.rb', line 12

def initialize
  @params = []
end

Instance Attribute Details

#params ⇒ Object (readonly)

Returns the value of attribute params.



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# File 'lib/sinatra/param_checker.rb', line 11

def params
  @params
end

Instance Method Details

#optional(name, options = {}) ⇒ Object 



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# File 'lib/sinatra/param_checker.rb', line 22

def optional(name, options = {})
  param = [:optional, name.to_s, options]
  validate_opts! param
  @params << param
end

#required(name, options = {}) ⇒ Object 



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# File 'lib/sinatra/param_checker.rb', line 16

def required(name, options = {})
  param = [:required, name.to_s, options]
  validate_opts! param
  @params << param
end

#validate!(params) ⇒ Object 



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# File 'lib/sinatra/param_checker.rb', line 28

def validate!(params)
  validated_params = @params.reduce({}) do |memo, e|
    type, name, opts = e
    begin
      # handle default
      v = if params[name].nil?
        case type
        when :optional
          (opts[:default].call if opts[:default].respond_to?(:call)) || opts[:default]
        when :required
          raise InvalidParameterError, "param #{name} not found"
        end
      else
        params[name]
      end

      unless v.nil?
        coerced_value = coerce(v, opts[:type], opts)
        validate(coerced_value, opts)
        memo[name] = coerced_value
      end
      memo
    rescue InvalidParameterError => e
      e.param, e.options = name, opts
      raise e
    end
  end

  validated_params.reduce(params) do |memo, pair|
    k, v = pair
    memo[k] = v
    memo
  end
end