@snippetify/book-reader/src/StyleBuilder.js

Book reader utilities

class StyleBuilder {
  constructor () {
    this.styles = {}
    this.config = {}
    this.rootElement = document
  }

  static getInstance () {
    return new StyleBuilder()
  }

  setRootElement (element) {
    this.rootElement = element
    return this
  }

  setConfig (config) {
    this.config = config
    this.styles = config.styles
    return this
  }

  find (key) {
    return this.styles[key]
  }

  setMany (items) {
    this.styles = items || {}
    return this
  }

  add (name, content) {
    this.styles[name] = content
    return this
  }

  remove (name) {
    delete this.styles[name]
    return this
  }

  removeMany (items) {
    items.forEach(v => this.remove(v))
    return this
  }

  removeAll (print) {
    this.styles = {}
    if (print) { this.unprint() }
    return this
  }

  build () {
    let content = ''

    $.each(this.styles, (name, values) => {
      content += name.includes('::') ? `.${this.config.vendor} ${name}{` : `.${this.config.vendor} .${name}{`
      $.each(values, (key, value) => {
        content += `${key}:${value};`
      })
      content += '}'
    })

    if (!$(this.rootElement).hasClass(this.config.vendor)) {
      $(this.rootElement).addClass(this.config.vendor)
    }

    return content
  }

  print () {
    let tag = $(`#${this.config.vendor}`)
    const tagExists = tag.length > 0
    tag = (tagExists ? tag : $('<style />', { id: this.config.vendor })).html(this.build())
    if (!tagExists) { tag.appendTo('head') }
    return this
  }

  unprint () {
    $(`#${this.config.vendor}`).remove()
  }
}

module.exports = StyleBuilder
module.exports.default = StyleBuilder