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// Utilities
const lowerCase = require('./lower-case')
const specials = require('./specials')
const regex = /(?:(?:(\s?(?:^|[.\(\)!?;:"-])\s*)(\w))|(\w))(\w*[’']*\w*)/g
const convertToRegExp = specials => specials.map(s => [new RegExp(`\\b${s}\\b`, 'gi'), s])
function parseMatch(match) {
const firstCharacter = match[0]
// test first character
if (/\s/.test(firstCharacter)) {
// if whitespace - trim and return
return match.substr(1)
}
if (/[\(\)]/.test(firstCharacter)) {
// if parens - this shouldn't be replaced
return null
}
return match
}
module.exports = (str, options = {}) => {
str = str.toLowerCase().replace(regex, (m, lead = '', forced, lower, rest) => {
const parsedMatch = parseMatch(m)
if (!parsedMatch) {
return m
}
if (!forced) {
const fullLower = lower + rest
if (lowerCase.has(fullLower)) {
return parsedMatch
}
}
return lead + (lower || forced).toUpperCase() + rest
})
const customSpecials = options.special || []
const replace = [...specials, ...customSpecials]
const replaceRegExp = convertToRegExp(replace)
replaceRegExp.forEach(([pattern, s]) => {
str = str.replace(pattern, s)
})
return str
}
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