MetricUtils.js

import {
  cond,
  conformsTo,
  constant,
  eq,
  flow,
  get,
  matches,
  replace,
  startsWith,
  stubTrue
} from 'lodash/fp'
import humanize from 'underscore.string.fp/humanize'

export const getMetricLabel = cond([
  [matches({ dataSource: 'node_data', metric: 'cpu:user' }),
    constant('CPU (td-agent user)')
  ],
  [matches({ dataSource: 'node_data', metric: 'cpu:system' }),
    constant('CPU (system total)')
  ],
  [matches({ dataSource: 'node_data', metric: 'cpu:loadavg1' }),
    constant('CPU (average load)')
  ],
  [conformsTo({ dataSource: eq('node_data'), metric: startsWith('disk:') }),
    flow(get('metric'), replace('disk:', ''), (type) => `Disk Usage (${type})`)
  ],
  [stubTrue,
    flow(get('metric'), replace(':', ' '), humanize)
  ]
])