Class: Asdawqw::APIHelper

Inherits:
Object
  • Object
show all
Defined in:
lib/asdawqw/api_helper.rb

Overview

API utility class

Class Method Summary collapse

Class Method Details

.append_url_with_query_parameters(query_builder, parameters, array_serialization: 'indexed') ⇒ Object

Appends the given set of parameters to the given query string.

Parameters:

  • The (String) —

    query string builder to add the query parameters to.

  • The (Hash) —

    parameters to append.

  • The (String) —

    format of array parameter serialization.



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# File 'lib/asdawqw/api_helper.rb', line 67

def self.append_url_with_query_parameters(query_builder, parameters,
                                          array_serialization: 'indexed')
  # Perform parameter validation.
  unless query_builder.instance_of? String
    raise ArgumentError, 'Given value for parameter \"query_builder\"
      is invalid.'
  end

  # Return if there are no parameters to replace.
  return query_builder if parameters.nil?

  parameters.each do |key, value|
    seperator = query_builder.include?('?') ? '&' : '?'
    unless value.nil?
      if value.instance_of? Array
        value.compact!
        query_builder += if array_serialization == 'csv'
                           "#{seperator}#{key}=#{value.map do |element|
                             CGI.escape(element.to_s)
                           end.join(',')}"
                         elsif array_serialization == 'psv'
                           "#{seperator}#{key}=#{value.map do |element|
                             CGI.escape(element.to_s)
                           end.join('|')}"
                         elsif array_serialization == 'tsv'
                           "#{seperator}#{key}=#{value.map do |element|
                             CGI.escape(element.to_s)
                           end.join("\t")}"
                         else
                           "#{seperator}#{APIHelper.serialize_array(
                             key, value, formatting: array_serialization
                           ).map { |k, v| "#{k}=#{CGI.escape(v.to_s)}" }
                           .join('&')}"
                         end
      else
        query_builder += "#{seperator}#{key}=#{CGI.escape(value.to_s)}"
      end
    end
  end
  query_builder
end

.append_url_with_template_parameters(query_builder, parameters) ⇒ Object

Replaces template parameters in the given url. parameters.

Parameters:

  • The (String) —

    query string builder to replace the template

  • The (Hash) —

    parameters to replace in the url.



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# File 'lib/asdawqw/api_helper.rb', line 34

def self.append_url_with_template_parameters(query_builder, parameters)
  # perform parameter validation
  unless query_builder.instance_of? String
    raise ArgumentError, 'Given value for parameter \"query_builder\" is
      invalid.'
  end

  # Return if there are no parameters to replace.
  return query_builder if parameters.nil?

  # Iterate and append parameters.
  parameters.each do |key, value|
    replace_value = ''

    if value.nil?
      replace_value = ''
    elsif value.instance_of? Array
      value.map! { |element| CGI.escape(element.to_s) }
      replace_value = value.join('/')
    else
      replace_value = CGI.escape(value.to_s)
    end

    # Find the template parameter and replace it with its value.
    query_builder = query_builder.gsub('{' + key.to_s + '}', replace_value)
  end
  query_builder
end

.clean_hash(hash) ⇒ Object

Removes elements with empty values from a hash.

Parameters:

  • The (Hash) —

    hash to clean.



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# File 'lib/asdawqw/api_helper.rb', line 147

def self.clean_hash(hash)
  hash.delete_if { |_key, value| value.to_s.strip.empty? }
end

.clean_url(url) ⇒ String

Validates and processes the given Url.

Parameters:

  • The (String) —

    given Url to process.

Returns:

  • (String) —

    Pre-processed Url as string.

Raises:

  • (ArgumentError) 


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# File 'lib/asdawqw/api_helper.rb', line 112

def self.clean_url(url)
  # Perform parameter validation.
  raise ArgumentError, 'Invalid Url.' unless url.instance_of? String

  # Ensure that the urls are absolute.
  matches = url.match(%r{^(https?:\/\/[^\/]+)})
  raise ArgumentError, 'Invalid Url format.' if matches.nil?

  # Get the http protocol match.
  protocol = matches[1]

  # Check if parameters exist.
  index = url.index('?')

  # Remove redundant forward slashes.
  query = url[protocol.length...(!index.nil? ? index : url.length)]
  query.gsub!(%r{\/\/+}, '/')

  # Get the parameters.
  parameters = !index.nil? ? url[url.index('?')...url.length] : ''

  # Return processed url.
  protocol + query + parameters
end

.custom_merge(a, b) ⇒ Object 



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# File 'lib/asdawqw/api_helper.rb', line 163

def self.custom_merge(a, b)
  x = {}
  a.each do |key, value_a|
    b.each do |k, value_b|
      next unless key == k
      x[k] = []
      if value_a.instance_of? Array
        value_a.each do |v|
          x[k].push(v)
        end
      else
        x[k].push(value_a)
      end
      if value_b.instance_of? Array
        value_b.each do |v|
          x[k].push(v)
        end
      else
        x[k].push(value_b)
      end
      a.delete(k)
      b.delete(k)
    end
  end
  x.merge!(a)
  x.merge!(b)
  x
end

.form_encode(obj, instance_name, formatting: 'indexed') ⇒ Hash

Form encodes an object. of a hash.

Parameters:

  • An (Dynamic) —

    object to form encode.

  • The (String) —

    name of the object.

Returns:

  • (Hash) —

    A form encoded representation of the object in the form



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# File 'lib/asdawqw/api_helper.rb', line 197

def self.form_encode(obj, instance_name, formatting: 'indexed')
  retval = {}

  serializable_types = [String, Numeric, TrueClass,
                        FalseClass, Date, DateTime]

  # If this is a structure, resolve it's field names.
  obj = obj.to_hash if obj.is_a? BaseModel

  # Create a form encoded hash for this object.
  if obj.nil?
    nil
  elsif obj.instance_of? Array
    if formatting == 'indexed'
      obj.each_with_index do |value, index|
        retval.merge!(APIHelper.form_encode(value, instance_name + '[' +
          index.to_s + ']'))
      end
    elsif serializable_types.map { |x| obj[0].is_a? x }.any?
      obj.each do |value|
        abc = if formatting == 'unindexed'
                APIHelper.form_encode(value, instance_name + '[]',
                                      formatting: formatting)
              else
                APIHelper.form_encode(value, instance_name,
                                      formatting: formatting)
              end
        retval = APIHelper.custom_merge(retval, abc)
        # print retval
      end
    else
      obj.each_with_index do |value, index|
        retval.merge!(APIHelper.form_encode(value, instance_name + '[' +
          index.to_s + ']', formatting: formatting))
      end
    end
  elsif obj.instance_of? Hash
    obj.each do |key, value|
      retval.merge!(APIHelper.form_encode(value, instance_name + '[' +
        key + ']', formatting: formatting))
    end
  else
    retval[instance_name] = obj
  end
  retval
end

.form_encode_parameters(form_parameters) ⇒ Hash

Form encodes a hash of parameters.

Parameters:

  • The (Hash) —

    hash of parameters to encode.

Returns:

  • (Hash) —

    A hash with the same parameters form encoded.



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# File 'lib/asdawqw/api_helper.rb', line 154

def self.form_encode_parameters(form_parameters)
  encoded = {}
  form_parameters.each do |key, value|
    encoded.merge!(APIHelper.form_encode(value, key, formatting:
      Configuration.array_serialization))
  end
  encoded
end

.json_deserialize(json) ⇒ Object

Parses JSON string.

Parameters:



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# File 'lib/asdawqw/api_helper.rb', line 139

def self.json_deserialize(json)
  return JSON.parse(json)
rescue StandardError
  raise TypeError, 'Server responded with invalid JSON.'
end

.rfc3339(date_time) ⇒ DateTime

Safely converts a string into an rfc3339 DateTime object

Parameters:

  • The (String) —

    datetime string

Returns:

  • (DateTime) —

    A DateTime object of rfc3339 format



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# File 'lib/asdawqw/api_helper.rb', line 247

def self.rfc3339(date_time)
  # missing timezone information
  if date_time.end_with?('Z') || date_time.index('+')
    DateTime.rfc3339(date_time)
  else
    DateTime.rfc3339(date_time + 'Z')
  end
end

.serialize_array(key, array, formatting: 'indexed') ⇒ Object

Serializes an array parameter (creates key value pairs).

Parameters:

  • The (String) —

    name of the parameter.

  • The (Array) —

    value of the parameter.

  • The (String) —

    format of the serialization.



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# File 'lib/asdawqw/api_helper.rb', line 13

def self.serialize_array(key, array, formatting: 'indexed')
  tuples = []

  if formatting == 'unindexed'
    tuples += array.map { |element| ["#{key}[]", element] }
  elsif formatting == 'indexed'
    tuples += array.map.with_index do |element, index|
      ["#{key}[#{index}]", element]
    end
  elsif formatting == 'plain'
    tuples += array.map { |element| [key, element] }
  else
    raise ArgumentError, 'Invalid format provided.'
  end
  tuples
end