Class: Banzai::ObjectRenderer

Inherits:
Object
  • Object
show all
Defined in:
lib/banzai/object_renderer.rb

Overview

Class for rendering multiple objects (e.g. Note instances) in a single pass, using render_field to benefit from caching in the database. Rendering and redaction are both performed.

The unredacted HTML is generated according to the usual render_field policy, so specify the pipeline and any other context options on the model.

The redacted (i.e., suitable for use) HTML is placed in an attribute named “redacted_<foo>”, where <foo> is the name of the cache field for the chosen attribute.

As an example, rendering the attribute ‘note` would place the unredacted HTML into `note_html` and the redacted HTML into `redacted_note_html`.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(default_project: nil, user: nil, redaction_context: {}) ⇒ ObjectRenderer

default_project - A default Project to use for redacting Markdown. user - The user viewing the Markdown/HTML documents, if any. redaction_context - A Hash containing extra attributes to use during redaction



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# File 'lib/banzai/object_renderer.rb', line 23

def initialize(default_project: nil, user: nil, redaction_context: {})
  @context = RenderContext.new(default_project, user)
  @redaction_context = base_context.merge(redaction_context)
end

Instance Attribute Details

#context ⇒ Object (readonly)

Returns the value of attribute context.



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# File 'lib/banzai/object_renderer.rb', line 18

def context
  @context
end

Instance Method Details

#render(objects, attribute) ⇒ Object

Renders and redacts an Array of objects.

objects - The objects to render. attribute - The attribute containing the raw Markdown to render.

Returns the same input objects.



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# File 'lib/banzai/object_renderer.rb', line 34

def render(objects, attribute)
  documents = render_documents(objects, attribute)
  documents = post_process_documents(documents, objects, attribute)
  redacted = redact_documents(documents)

  objects.each_with_index do |object, index|
    redacted_data = redacted[index]
    object.__send__("redacted_#{attribute}_html=", redacted_data[:document].to_html(save_options).html_safe) # rubocop:disable GitlabSecurity/PublicSend
    object.user_visible_reference_count = redacted_data[:visible_reference_count] if object.respond_to?(:user_visible_reference_count)
    object.total_reference_count = redacted_data[:total_reference_count] if object.respond_to?(:total_reference_count)
  end
end