Class: Handlebarsjs::BaseHelper

Inherits:

Object

• Object
• Handlebarsjs::BaseHelper

Defined in:

lib/handlebarsjs/base_helper.rb

Overview

Extend base helper for each of your custom handlebars-helpers

Direct Known Subclasses

Helpers::Array::Join, Helpers::Array::JoinPost, Helpers::Array::JoinPre, Helpers::Case::BackSlash, Helpers::Case::Camel, Helpers::Case::Constant, Helpers::Case::Dash, Helpers::Case::Dot, Helpers::Case::DoubleColon, Helpers::Case::Human, Helpers::Case::Lamel, Helpers::Case::Lower, Helpers::Case::Slash, Helpers::Case::Snake, Helpers::Case::Title, Helpers::Case::Upper, Helpers::Comparison::And, Helpers::Comparison::Default, Helpers::Comparison::Eq, Helpers::Comparison::Gt, Helpers::Comparison::Gte, Helpers::Comparison::Lt, Helpers::Comparison::Lte, Helpers::Comparison::Ne, Helpers::Comparison::Or, Helpers::Inflection::Ordinal, Helpers::Inflection::Ordinalize, Helpers::Inflection::Pluralize, Helpers::Inflection::PluralizeNumber, Helpers::Inflection::PluralizeNumberWord, Helpers::Inflection::Singularize, Helpers::Misc::FormatJson, Helpers::Misc::Safe, Helpers::Str::Padl, Helpers::Str::Padr

Class Attribute Summary

• .block ⇒ Object readonly

  Returns the value of attribute block.

• .cmdlet ⇒ Object readonly

  Returns the value of attribute cmdlet.

• .parameter_names ⇒ Object readonly

  Returns the value of attribute parameter_names.

• .safe ⇒ Object readonly

  Returns the value of attribute safe.

Instance Attribute Summary

• #block ⇒ Object readonly

  Returns the value of attribute block.

• #cmdlet ⇒ Object readonly

  Returns the value of attribute cmdlet.

• #parameter_names ⇒ Object readonly

  Returns the value of attribute parameter_names.

• #safe ⇒ Object readonly

  Returns the value of attribute safe.

Class Method Summary

• .register_cmdlet(cmdlet, block: false, safe: false, parameter_names: []) ⇒ Object

  Register the cmdlet to be used by the helper.

Instance Method Summary

• #initialize(cmdlet = nil, safe: nil, parameter_names: nil) ⇒ BaseHelper constructor

  Preferred way to register the internal command is via register_cmdlet but you can also register the command directly in the initializer and that can be handy if you use a custom configured cmdlet.

• #to_proc ⇒ Object

  Wrap the cmdlet call method in a handlebars context aware block and return as a lambda/proc so that it is available to the Handlebars template engine.

• #wrapper(value) ⇒ Object

  If you need to wrap the return value then you can override this method.

Constructor Details

#initialize(cmdlet = nil, safe: nil, parameter_names: nil) ⇒ BaseHelper

Preferred way to register the internal command is via register_cmdlet but you can also register the command directly in the initializer and that can be handy if you use a custom configured cmdlet

# File 'lib/handlebarsjs/base_helper.rb', line 14

def initialize(cmdlet = nil, safe: nil, parameter_names: nil)
  initialize_cmdlet(cmdlet)
  initialize_safe(safe)
  initialize_block(block)
  initialize_parameter_names(parameter_names)
end

Class Attribute Details

.block ⇒ Object (readonly)

Returns the value of attribute block.

# File 'lib/handlebarsjs/base_helper.rb', line 23

def block
  @block
end

.cmdlet ⇒ Object (readonly)

Returns the value of attribute cmdlet.

# File 'lib/handlebarsjs/base_helper.rb', line 22

def cmdlet
  @cmdlet
end

.parameter_names ⇒ Object (readonly)

Returns the value of attribute parameter_names.

# File 'lib/handlebarsjs/base_helper.rb', line 25

def parameter_names
  @parameter_names
end

.safe ⇒ Object (readonly)

Returns the value of attribute safe.

# File 'lib/handlebarsjs/base_helper.rb', line 24

def safe
  @safe
end

Instance Attribute Details

#block ⇒ Object (readonly)

Returns the value of attribute block.

# File 'lib/handlebarsjs/base_helper.rb', line 7

def block
  @block
end

#cmdlet ⇒ Object (readonly)

Returns the value of attribute cmdlet.

# File 'lib/handlebarsjs/base_helper.rb', line 6

def cmdlet
  @cmdlet
end

#parameter_names ⇒ Object (readonly)

Returns the value of attribute parameter_names.

# File 'lib/handlebarsjs/base_helper.rb', line 9

def parameter_names
  @parameter_names
end

#safe ⇒ Object (readonly)

Returns the value of attribute safe.

# File 'lib/handlebarsjs/base_helper.rb', line 8

def safe
  @safe
end

Class Method Details

.register_cmdlet(cmdlet, block: false, safe: false, parameter_names: []) ⇒ Object

Register the cmdlet to be used by the helper

By default, it will register an function expression helper You can use HTML by setting safe to true

# File 'lib/handlebarsjs/base_helper.rb', line 36

def register_cmdlet(cmdlet, block: false, safe: false, parameter_names: [])
  @cmdlet = cmdlet
  @block = block
  @safe = safe
  @parameter_names = parameter_names
end

Instance Method Details

#to_proc ⇒ Object

Wrap the cmdlet call method in a handlebars context aware block and return as a lambda/proc so that it is available to the Handlebars template engine

# File 'lib/handlebarsjs/base_helper.rb', line 52

def to_proc
  ->(value, _opts) { wrapper(cmdlet.call(value)) }
end

#wrapper(value) ⇒ Object

If you need to wrap the return value then you can override this method

# File 'lib/handlebarsjs/base_helper.rb', line 45

def wrapper(value)
  value
end