banana-i18n/src/languages/fi.js

Banana Internationalization library

/**
 * Finnish (Suomi) language functions
 *
 * @author Santhosh Thottingal
 */

import BananaLanguage from './language.js'

export default class FinnishLanguage extends BananaLanguage {
  convertGrammar (word, form) {
    // vowel harmony flag
    let aou = word.match(/[aou][^äöy]*$/i)

    const origWord = word
    if (word.match(/wiki$/i)) {
      aou = false
    }

    // append i after final consonant
    if (word.match(/[bcdfghjklmnpqrstvwxz]$/i)) {
      word += 'i'
    }

    switch (form) {
      case 'genitive':
        word += 'n'
        break
      case 'elative':
        word += (aou ? 'sta' : 'stä')
        break
      case 'partitive':
        word += (aou ? 'a' : 'ä')
        break
      case 'illative':
        // Double the last letter and add 'n'
        word += word.slice(-1) + 'n'
        break
      case 'inessive':
        word += (aou ? 'ssa' : 'ssä')
        break
      default:
        word = origWord
        break
    }

    return word
  }
}