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Filename : convert-case.ts
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/*
 * Copyright (C) 2015 - present Instructure, Inc.
 *
 * This file is part of Canvas.
 *
 * Canvas is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by the Free
 * Software Foundation, version 3 of the License.
 *
 * Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Affero General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */

// converts to PascalCase by default
export function camelizeString(str: string, lowerFirst: boolean = false) {
  return (str || '').replace(/(?:^|[-_])(\w)/g, (_, c, index) => {
    if (index === 0 && lowerFirst) {
      return c ? c.toLowerCase() : ''
    } else {
      return c ? c.toUpperCase() : ''
    }
  })
}

// Convert all property keys in an object to camelCase
export function camelizeProperties<T>(props: {[key: string]: unknown}): T {
  const attrs: {
    [key: string]: any
  } = {}

  for (const prop in props) {
    if (props.hasOwnProperty(prop)) {
      attrs[camelizeString(prop, true)] = props[prop]
    }
  }

  return attrs as T
}

export function underscoreString(string: string) {
  return (string || '')
    .replace(/([A-Z])/g, '_$1')
    .replace(/^_/, '')
    .toLowerCase()
}

export function underscoreProperties<T>(props: {[key: string]: unknown}): T {
  const attrs: {
    [key: string]: any
  } = {}

  for (const prop in props) {
    if (props.hasOwnProperty(prop)) {
      attrs[underscoreString(prop)] = props[prop]
    }
  }

  return attrs as T
}