Module: Webhookdb::Service::ViewApi

Included in:
API::Install
Defined in:
lib/webhookdb/service/view_api.rb

Overview

Mixin for Grape API endpoints that use HTML rendering. This isn’t tested well enough.

Defined Under Namespace

Classes: FormError

Class Method Summary collapse

Class Method Details

.included(mod) ⇒ Object 



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# File 'lib/webhookdb/service/view_api.rb', line 15

def self.included(mod)
  mod.helpers do
    define_method(:render_liquid) do |
      data_rel_path,
      vars: {},
      content_type: "text/html",
      # If true, store view params in a cookie so we can re-render this page easily, usually to show errors.
      serialize_view_params: false
    |
      tmpl_file = File.open(Webhookdb::DATA_DIR + data_rel_path)
      liquid_tmpl = Liquid::Template.parse(tmpl_file.read)
      rendered = liquid_tmpl.render!(vars.stringify_keys, registers: {})
      _endpoint.content_type content_type
      if serialize_view_params
        _endpoint.cookies[:whdbviewparams] = {path: data_rel_path, vars:, content_type:}.to_json
      end
      env["api.format"] = :binary
      rendered
    end

    define_method(:_endpoint) do
      env["api.endpoint"]
    end
  end

  mod.rescue_from FormError do |e|
    if (params = _endpoint.cookies[:whdbviewparams]).blank?
      merror!(e.status, e.message)
    else
      begin
        h = JSON.parse(params)
      rescue StandardException
        # If there are any problems, use fallback error handling.
        merror!(e.status, e.message)
      else
        vars = h["vars"].symbolize_keys
        vars[:error_message] = e.message
        new_html = render_liquid(
          h.fetch("path"),
          vars:,
          content_type: h.fetch("content_type"),
          serialize_view_params: true,
        )
        Rack::Response.new(new_html, e.status, {"Content-Type" => "text/html"})
      end
    end
  end
end