Module: Elasticsearch::API::Utils

Extended by:
Utils
Included in:
Utils
Defined in:
lib/elasticsearch/api/utils.rb

Overview

Generic utility methods

Instance Method Summary collapse

Instance Method Details

#__bulkify(payload) ⇒ Object

Convert an array of payloads into Elasticsearch `headerndata` format

Supports various different formats of the payload: Array of Strings, Header/Data pairs, or the conveniency “combined” format where data is passed along with the header in a single item.

Elasticsearch::API::Utils.__bulkify [
  { :index =>  { :_index => 'myindexA', :_type => 'mytype', :_id => '1', :data => { :title => 'Test' } } },
  { :update => { :_index => 'myindexB', :_type => 'mytype', :_id => '2', :data => { :doc => { :title => 'Update' } } } }
]

# => {"index":{"_index":"myindexA","_type":"mytype","_id":"1"}}
# => {"title":"Test"}
# => {"update":{"_index":"myindexB","_type":"mytype","_id":"2"}}
# => {"doc":{"title":"Update"}}

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# File 'lib/elasticsearch/api/utils.rb', line 99

def __bulkify(payload)
  operations = %w[index create delete update]

  case

  # Hashes with `:data`
  when payload.any? { |d| d.is_a?(Hash) && d.values.first.is_a?(Hash) && operations.include?(d.keys.first.to_s) && (d.values.first[:data] || d.values.first['data']) }
    payload = payload.
      inject([]) do |sum, item|
        operation, meta = item.to_a.first
        meta            = meta.clone
        data            = meta.delete(:data) || meta.delete('data')

        sum << { operation => meta }
        sum << data if data
        sum
      end.
      map { |item| Elasticsearch::API.serializer.dump(item) }
    payload << '' unless payload.empty?

  # Array of strings
  when payload.all? { |d| d.is_a? String }
    payload << ''

  # Header/Data pairs
  else
    payload = payload.map { |item| Elasticsearch::API.serializer.dump(item) }
    payload << ''
  end

  payload = payload.join("\n")
end

#__escape(string) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

URL-escape a string

Examples:

__escape('foo/bar') # => 'foo%2Fbar'
__escape('bar^bam') # => 'bar%5Ebam'

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# File 'lib/elasticsearch/api/utils.rb', line 31

def __escape(string)
  return string if string == '*'
  ERB::Util.url_encode(string.to_s)
end

#__extract_parts(arguments, valid_parts = []) ⇒ Array<String>

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Note:

Mutates the `arguments` argument, to prevent failures in `__validate_and_extract_params`.

Extracts the valid parts of the URL from the arguments

Examples:

Extract parts

__extract_parts { :foo => true }, [:foo, :bar]
# => [:foo]

Parameters:

  • arguments (Hash)

    Hash of arguments to verify and extract, **with symbolized keys**

  • valid_parts (Array<Symbol>) (defaults to: [])

    An array of symbol with valid keys

Returns:

  • (Array<String>)

    Valid parts of the URL as an array of strings


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# File 'lib/elasticsearch/api/utils.rb', line 153

def __extract_parts(arguments, valid_parts=[])
  Hash[arguments].reduce([]) { |sum, item| k, v = item; v.is_a?(TrueClass) ? sum << k.to_s : sum << v  }
end

#__listify(*list) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Create a “list” of values from arguments, ignoring nil values and encoding special characters.

Examples:

Create a list from array

__listify(['A','B']) # => 'A,B'

Create a list from arguments

__listify('A','B') # => 'A,B'

Escape values

__listify('foo','bar^bam') # => 'foo,bar%5Ebam'

Do not escape the values

__listify('foo','bar^bam', escape: false) # => 'foo,bar^bam'

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# File 'lib/elasticsearch/api/utils.rb', line 51

def __listify(*list)
  options = list.last.is_a?(Hash) ? list.pop : {}

  escape = options[:escape]
  Array(list).
    flat_map { |e| e.respond_to?(:split) ? e.split(',') : e }.
    flatten.
    compact.
    map { |e| escape == false ? e : __escape(e) }.
    join(',')
end

#__pathify(*segments) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Create a path (URL part) from arguments, ignoring nil values and empty strings.

# @example Encode special characters

__pathify(['foo', 'bar^bam']) # => 'foo/bar%5Ebam'

Examples:

Create a path from array

__pathify(['foo', '', nil, 'bar']) # => 'foo/bar'

Create a path from arguments

__pathify('foo', '', nil, 'bar') # => 'foo/bar'

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# File 'lib/elasticsearch/api/utils.rb', line 75

def __pathify(*segments)
  Array(segments).flatten.
    compact.
    reject { |s| s.to_s.strip.empty? }.
    join('/').
    squeeze('/')
end

#__report_unsupported_method(name) ⇒ Object


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# File 'lib/elasticsearch/api/utils.rb', line 220

def __report_unsupported_method(name)
  message = "[!] You are using unsupported method [#{name}]"
  if source = caller && caller.last
    message += " in `#{source}`"
  end

  message += ". This method is not supported in the version you're using: #{Elasticsearch::API::VERSION}, and will be removed in the next release. Suppress this warning by the `-WO` command line flag."

  if STDERR.tty?
    Kernel.warn "\e[31;1m#{message}\e[0m"
  else
    Kernel.warn message
  end
end

#__report_unsupported_parameters(arguments, params = []) ⇒ Object


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# File 'lib/elasticsearch/api/utils.rb', line 178

def __report_unsupported_parameters(arguments, params=[])
  messages = []
  unsupported_params = params.select {|d| d.is_a?(Hash) ? arguments.include?(d.keys.first) : arguments.include?(d) }

  unsupported_params.each do |param|
    name = case param
    when Symbol
      param
    when Hash
      param.keys.first
    else
      raise ArgumentError, "The param must be a Symbol or a Hash"
    end

    explanation = if param.is_a?(Hash)
      ". #{param.values.first[:explanation]}."
    else
      ". This parameter is not supported in the version you're using: #{Elasticsearch::API::VERSION}, and will be removed in the next release."
    end

    message = "[!] You are using unsupported parameter [:#{name}]"

    if source = caller && caller.last
      message += " in `#{source}`"
    end

    message += explanation

    messages << message
  end

  unless messages.empty?
    messages << "Suppress this warning by the `-WO` command line flag."

    if STDERR.tty?
      Kernel.warn messages.map { |m| "\e[31;1m#{m}\e[0m" }.join("\n")
    else
      Kernel.warn messages.join("\n")
    end
  end
end

#__rescue_from_not_found {|block| ... } ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Calls the given block, rescuing from `StandardError`.

Primary use case is the `:ignore` parameter for API calls.

Returns `false` if exception contains NotFound in its class name or message, else re-raises the exception.

Yields:

  • (block)

    A block of code to be executed with exception handling.


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# File 'lib/elasticsearch/api/utils.rb', line 168

def __rescue_from_not_found(&block)
  yield
rescue StandardError => e
  if e.class.to_s =~ /NotFound/ || e.message =~ /Not\s*Found/i
    false
  else
    raise e
  end
end

#process_params(arguments) ⇒ Object


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# File 'lib/elasticsearch/api/utils.rb', line 132

def process_params(arguments)
  arguments = Hash[arguments] unless arguments.is_a?(Hash)
  Hash[arguments.map { |k, v| v.is_a?(Array) ? [k, __listify(v, { escape: false })] : [k, v] }] # Listify Arrays
end