Class: Handlebarsjs::HandlebarsSnapshot

Inherits:
Object
  • Object
show all
Includes:
KLog::Logging
Defined in:
lib/handlebarsjs/handlebars_snapshot.rb

Overview

Wraps MiniRacer snapshot with specific emphasis on loading Handlebars helpers onto the MiniRacer context in the correct order. So that new contexts are preloaded with the handlebars library and the configured helpers.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ HandlebarsSnapshot 



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

def initialize
  @scripts = []
  @helpers = []
end

Instance Attribute Details

#helpers ⇒ Object (readonly)

Returns the value of attribute helpers.



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# File 'lib/handlebarsjs/handlebars_snapshot.rb', line 12

def helpers
  @helpers
end

#scripts ⇒ Object (readonly)

Returns the value of attribute scripts.



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# File 'lib/handlebarsjs/handlebars_snapshot.rb', line 11

def scripts
  @scripts
end

Instance Method Details

#add_callback(name, callback, safe, parameters) ⇒ Object 



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# File 'lib/handlebarsjs/handlebars_snapshot.rb', line 37

def add_callback(name, callback, safe, parameters)
  add_helper_entry(
    name: name,
    helper: nil,
    callback: callback,
    safe: safe,
    parameters: parameters
  )
end

#add_helper(name, helper) ⇒ Object 



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# File 'lib/handlebarsjs/handlebars_snapshot.rb', line 27

def add_helper(name, helper)
  add_helper_entry(
    name: name,
    helper: helper,
    callback: helper.to_proc,
    safe: helper.safe,
    parameters: helper.parameter_names
  )
end

#add_library(name, script: nil, path: nil) ⇒ Object 



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# File 'lib/handlebarsjs/handlebars_snapshot.rb', line 19

def add_library(name, script: nil, path: nil)
  add_script(name, 'library', script: script, path: path)
end

#add_snippet(name, script: nil, path: nil) ⇒ Object 



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

def add_snippet(name, script: nil, path: nil)
  add_script(name, 'snippet', script: script, path: path)
end

#debug ⇒ Object 



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# File 'lib/handlebarsjs/handlebars_snapshot.rb', line 75

def debug
  data = { scripts: scripts, helpers: helpers }
  log.structure(data)
end

#debug_register_scripts ⇒ Object 



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# File 'lib/handlebarsjs/handlebars_snapshot.rb', line 80

def debug_register_scripts
  register_scripts = helpers.map do |helper|
    # Handlebarsjs::Handlebars.register_safe_string_helper_script(
    #   helper[:name]
    # )
    # helper[:helper].build_register_helper_script(
    #   helper[:name],
    #   safe: helper[:safe]
    # )
  end
  puts register_scripts.join("\n")
end

#dirty? ⇒ Boolean

not currently used



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# File 'lib/handlebarsjs/handlebars_snapshot.rb', line 71

def dirty?
  @snapshot.nil?
end

#new_context ⇒ Object 



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# File 'lib/handlebarsjs/handlebars_snapshot.rb', line 59

def new_context
  context = MiniRacer::Context.new(snapshot: snapshot)

  helpers.each do |helper_entry|
    attach_ruby(context, helper_entry)
    eval_register_helper(context, helper_entry)
  end

  context
end

#register_helper(name) ⇒ Object 



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# File 'lib/handlebarsjs/handlebars_snapshot.rb', line 47

def register_helper(name)
  add_script(name, 'helper', script: "Handlebars.registerHelper('#{name}', ruby_#{name})")
end

#script ⇒ Object 



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# File 'lib/handlebarsjs/handlebars_snapshot.rb', line 51

def script
  scripts.map { |script| "// #{script[:type]} - #{script[:name]}\n#{script[:script]}" }.join("\n\n")
end

#snapshot ⇒ Object 



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# File 'lib/handlebarsjs/handlebars_snapshot.rb', line 55

def snapshot
  @snapshot ||= MiniRacer::Snapshot.new(script)
end