Module: HistoriesHelper

Defined in:
app/helpers/histories_helper.rb

Constant Summary collapse

UNSPECIFIED_VALUE = 
'<span class="unspecified">Not specified</span>'.html_safe.freeze

Instance Method Summary collapse

Instance Method Details

#render_diff_event_content(content) ⇒ Object

Given a json hash of attribute changes, renders a human-readable description of the changes. Example input: { “name”: [“Old Name”, “New Name”], “description”: [null, “New Description”], “removed_key”: [“Old Key”, null] } Example output: name: 'Old Name' -> 'New Name'<br/> description: '' -> 'New Description'<br/> removed_key: 'Old Key' -> ''



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# File 'app/helpers/histories_helper.rb', line 16

def render_diff_event_content(content)
  changes = JSON.parse(content)
  changes.map do |attribute, (old_value, new_value)|
    old_value = UNSPECIFIED_VALUE if old_value.nil?
    new_value = UNSPECIFIED_VALUE if new_value.nil?
    "#{h(attribute.humanize)}:&emsp; #{h(old_value)} &rarr; #{h(new_value)}"
  end.join('<br/>').html_safe # rubocop:disable Rails/OutputSafety
rescue StandardError
  # if content is not a valid JSON string, return it as is
  h(content)
end