Module: PlanMyStuff::MetadataParser

Defined in:
lib/plan_my_stuff/metadata_parser.rb

Constant Summary collapse

METADATA_PATTERN = 
/\A<!-- pms-metadata:(.*?) -->\n*/m

Class Method Summary collapse

Class Method Details

.parse(raw_body) ⇒ Hash{Symbol => Hash, String}

Extracts metadata JSON from the raw body

Parameters:

  • raw_body (String, nil)

Returns:

  • (Hash{Symbol => Hash, String}) —

    :metadata (Hash, empty when absent) and :body (String)



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# File 'lib/plan_my_stuff/metadata_parser.rb', line 17

def parse(raw_body)
  return { metadata: {}, body: '' } if raw_body.blank?

  match = raw_body.match(METADATA_PATTERN)
  return { metadata: {}, body: raw_body } if match.nil?

  metadata = JSON.parse(match[1], symbolize_names: true)
  body = raw_body.sub(METADATA_PATTERN, '')

  { metadata: metadata, body: body }
rescue JSON::ParserError
  { metadata: {}, body: raw_body }
end

.serialize(metadata, body) ⇒ String

Serializes a metadata hash and body into the stored format

Parameters:

Returns:

  • (String) 


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# File 'lib/plan_my_stuff/metadata_parser.rb', line 38

def serialize(metadata, body)
  if !metadata.is_a?(Hash) && !metadata.is_a?(PlanMyStuff::CustomFields)
    raise(ArgumentError, "metadata must be a Hash or PlanMyStuff::CustomFields, got #{metadata.class}")
  end

  json =
    if metadata.is_a?(PlanMyStuff::CustomFields)
      metadata.to_json
    else
      JSON.pretty_generate(metadata)
    end

  "<!-- pms-metadata:#{json} -->\n\n#{body}"
end