import cheerio from 'cheerio'

// Attributes
export const attrImpl = function(nothing, just, name, cheerioInst) {

  if (cheerioInst.length > 0) {
    const value = cheerioInst.attr(name);
    return value != null ? just(value) : nothing;
  }

  return nothing;
}

export const hasClassImpl = function(className, cheerioInst) {
  return cheerioInst.hasClass(className);
}

// Traversing
export const findImpl = function(selector, cheerioInst) {
  return cheerioInst.find(selector);
}

export const parent = function(cheerioInst) {
  return cheerioInst.parent()
}

export const next = function(cheerioInst) {
  return cheerioInst.next()
}

export const prev = function(cheerioInst) {
  return cheerioInst.prev()
}

export const siblings = function(cheerioInst) {
  return cheerioInst.siblings()
}

export const children = function(cheerioInst) {
  return cheerioInst.children()
}

export const first = function(cheerioInst) {
  return cheerioInst.first()
}

export const last = function(cheerioInst) {
  return cheerioInst.last()
}

export const eqImpl = function(index, cheerioInst) {
  return cheerioInst.eq(index)
}

// Rendering
export const htmlImpl = function(nothing, just, cheerioInst) {
  return cheerioInst.length ? just(cheerioInst.html()) : nothing;
}

export const text = function(cheerioInst) {
  return cheerioInst.text()
}

// Miscellaneous
export const length = function(cheerioInst) {
  return cheerioInst.length;
}