io.outfoxx.sunday.generator.utils.StringExts.kt Maven / Gradle / Ivy

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/*
 * Copyright 2020 Outfox, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.outfoxx.sunday.generator.utils

fun String.toLowercaseInitialWordOrAbbreviation(): String {
  val builder = StringBuilder()
  var needToLower = true
  forEach {
    if (needToLower && it.isLowerCase()) {
      needToLower = false
      builder.append(it)
    } else {
      builder.append(it.lowercase())
    }
  }
  return builder.toString()
}

fun String.toUppercaseInitialWordOrAbbreviation(): String {
  val builder = StringBuilder()
  var needToUpper = true
  forEach {
    if (needToUpper && it.isUpperCase()) {
      needToUpper = false
      builder.append(it)
    } else {
      builder.append(it.uppercase())
    }
  }
  return builder.toString()
}

fun String.toUpperCamelCase(): String = split('-', '_', '.').joinToString("") { s -> s.replaceFirstChar { it.titlecase() } }

fun String.toLowerCamelCase(): String = toUpperCamelCase().replaceFirstChar { it.lowercase() }

val camelRegex = """(?<=[a-zA-Z])[A-Z]""".toRegex()

fun String.camelCaseToKebabCase() =
  camelRegex.replace(this) { "-${it.value}" }
    .lowercase()
    .replace("a-p-i", "api")