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Filename : ControlSidebar.js
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/**
 * --------------------------------------------
 * AdminLTE ControlSidebar.js
 * License MIT
 * --------------------------------------------
 */

const ControlSidebar = (($) => {
  /**
   * Constants
   * ====================================================
   */

  const NAME               = 'ControlSidebar'
  const DATA_KEY           = 'lte.controlsidebar'
  const EVENT_KEY          = `.${DATA_KEY}`
  const JQUERY_NO_CONFLICT = $.fn[NAME]
  const DATA_API_KEY       = '.data-api'

  const Event = {
    COLLAPSED: `collapsed${EVENT_KEY}`,
    EXPANDED: `expanded${EVENT_KEY}`,
  }

  const Selector = {
    CONTROL_SIDEBAR: '.control-sidebar',
    CONTROL_SIDEBAR_CONTENT: '.control-sidebar-content',
    DATA_TOGGLE: '[data-widget="control-sidebar"]',
    CONTENT: '.content-wrapper',
    HEADER: '.main-header',
    FOOTER: '.main-footer',
  }

  const ClassName = {
    CONTROL_SIDEBAR_ANIMATE: 'control-sidebar-animate',
    CONTROL_SIDEBAR_OPEN: 'control-sidebar-open',
    CONTROL_SIDEBAR_SLIDE: 'control-sidebar-slide-open',
    LAYOUT_FIXED: 'layout-fixed',
    NAVBAR_FIXED: 'layout-navbar-fixed',
    NAVBAR_SM_FIXED: 'layout-sm-navbar-fixed',
    NAVBAR_MD_FIXED: 'layout-md-navbar-fixed',
    NAVBAR_LG_FIXED: 'layout-lg-navbar-fixed',
    NAVBAR_XL_FIXED: 'layout-xl-navbar-fixed',
    FOOTER_FIXED: 'layout-footer-fixed',
    FOOTER_SM_FIXED: 'layout-sm-footer-fixed',
    FOOTER_MD_FIXED: 'layout-md-footer-fixed',
    FOOTER_LG_FIXED: 'layout-lg-footer-fixed',
    FOOTER_XL_FIXED: 'layout-xl-footer-fixed',
  }

  const Default = {
    controlsidebarSlide: true,
    scrollbarTheme : 'os-theme-light',
    scrollbarAutoHide: 'l',
  }

  /**
   * Class Definition
   * ====================================================
   */

  class ControlSidebar {
    constructor(element, config) {
      this._element = element
      this._config  = config

      this._init()
    }

    // Public

    collapse() {
      // Show the control sidebar
      if (this._config.controlsidebarSlide) {
        $('html').addClass(ClassName.CONTROL_SIDEBAR_ANIMATE)
        $('body').removeClass(ClassName.CONTROL_SIDEBAR_SLIDE).delay(300).queue(function(){
          $(Selector.CONTROL_SIDEBAR).hide()
          $('html').removeClass(ClassName.CONTROL_SIDEBAR_ANIMATE)
          $(this).dequeue()
        })
      } else {
        $('body').removeClass(ClassName.CONTROL_SIDEBAR_OPEN)
      }

      const collapsedEvent = $.Event(Event.COLLAPSED)
      $(this._element).trigger(collapsedEvent)
    }

    show() {
      // Collapse the control sidebar
      if (this._config.controlsidebarSlide) {
        $('html').addClass(ClassName.CONTROL_SIDEBAR_ANIMATE)
        $(Selector.CONTROL_SIDEBAR).show().delay(10).queue(function(){
          $('body').addClass(ClassName.CONTROL_SIDEBAR_SLIDE).delay(300).queue(function(){
            $('html').removeClass(ClassName.CONTROL_SIDEBAR_ANIMATE)
            $(this).dequeue()
          })
          $(this).dequeue()
        })
      } else {
        $('body').addClass(ClassName.CONTROL_SIDEBAR_OPEN)
      }

      const expandedEvent = $.Event(Event.EXPANDED)
      $(this._element).trigger(expandedEvent)
    }

    toggle() {
      const shouldClose = $('body').hasClass(ClassName.CONTROL_SIDEBAR_OPEN) || $('body')
        .hasClass(ClassName.CONTROL_SIDEBAR_SLIDE)
      if (shouldClose) {
        // Close the control sidebar
        this.collapse()
      } else {
        // Open the control sidebar
        this.show()
      }
    }

    // Private

    _init() {
      this._fixHeight()
      this._fixScrollHeight()

      $(window).resize(() => {
        this._fixHeight()
        this._fixScrollHeight()
      })

      $(window).scroll(() => {
        if ($('body').hasClass(ClassName.CONTROL_SIDEBAR_OPEN) || $('body').hasClass(ClassName.CONTROL_SIDEBAR_SLIDE)) {
            this._fixScrollHeight()
        }
      })
    }

    _fixScrollHeight() {
      const heights = {
        scroll: $(document).height(),
        window: $(window).height(),
        header: $(Selector.HEADER).outerHeight(),
        footer: $(Selector.FOOTER).outerHeight(),
      }
      const positions = {
        bottom: Math.abs((heights.window + $(window).scrollTop()) - heights.scroll),
        top: $(window).scrollTop(),
      }

      let navbarFixed = false;
      let footerFixed = false;

      if ($('body').hasClass(ClassName.LAYOUT_FIXED)) {
        if (
          $('body').hasClass(ClassName.NAVBAR_FIXED)
          || $('body').hasClass(ClassName.NAVBAR_SM_FIXED)
          || $('body').hasClass(ClassName.NAVBAR_MD_FIXED)
          || $('body').hasClass(ClassName.NAVBAR_LG_FIXED)
          || $('body').hasClass(ClassName.NAVBAR_XL_FIXED)
        ) {
          if ($(Selector.HEADER).css("position") === "fixed") {
            navbarFixed = true;
          }
        }
        if (
          $('body').hasClass(ClassName.FOOTER_FIXED)
          || $('body').hasClass(ClassName.FOOTER_SM_FIXED)
          || $('body').hasClass(ClassName.FOOTER_MD_FIXED)
          || $('body').hasClass(ClassName.FOOTER_LG_FIXED)
          || $('body').hasClass(ClassName.FOOTER_XL_FIXED)
        ) {
          if ($(Selector.FOOTER).css("position") === "fixed") {
            footerFixed = true;
          }
        }

        if (positions.top === 0 && positions.bottom === 0) {
          $(Selector.CONTROL_SIDEBAR).css('bottom', heights.footer);
          $(Selector.CONTROL_SIDEBAR).css('top', heights.header);
          $(Selector.CONTROL_SIDEBAR + ', ' + Selector.CONTROL_SIDEBAR + ' ' + Selector.CONTROL_SIDEBAR_CONTENT).css('height', heights.window - (heights.header + heights.footer))
        } else if (positions.bottom <= heights.footer) {
          if (footerFixed === false) {  
            $(Selector.CONTROL_SIDEBAR).css('bottom', heights.footer - positions.bottom);
            $(Selector.CONTROL_SIDEBAR + ', ' + Selector.CONTROL_SIDEBAR + ' ' + Selector.CONTROL_SIDEBAR_CONTENT).css('height', heights.window - (heights.footer - positions.bottom))
          } else {
            $(Selector.CONTROL_SIDEBAR).css('bottom', heights.footer);
          }
        } else if (positions.top <= heights.header) {
          if (navbarFixed === false) {
            $(Selector.CONTROL_SIDEBAR).css('top', heights.header - positions.top);
            $(Selector.CONTROL_SIDEBAR + ', ' + Selector.CONTROL_SIDEBAR + ' ' + Selector.CONTROL_SIDEBAR_CONTENT).css('height', heights.window - (heights.header - positions.top))
          } else {
            $(Selector.CONTROL_SIDEBAR).css('top', heights.header);
          }
        } else {
          if (navbarFixed === false) {
            $(Selector.CONTROL_SIDEBAR).css('top', 0);
            $(Selector.CONTROL_SIDEBAR + ', ' + Selector.CONTROL_SIDEBAR + ' ' + Selector.CONTROL_SIDEBAR_CONTENT).css('height', heights.window)
          } else {
            $(Selector.CONTROL_SIDEBAR).css('top', heights.header);
          }
        }
      }
    }

    _fixHeight() {
      const heights = {
        window: $(window).height(),
        header: $(Selector.HEADER).outerHeight(),
        footer: $(Selector.FOOTER).outerHeight(),
      }

      if ($('body').hasClass(ClassName.LAYOUT_FIXED)) {
        let sidebarHeight = heights.window - heights.header;

        if (
          $('body').hasClass(ClassName.FOOTER_FIXED)
          || $('body').hasClass(ClassName.FOOTER_SM_FIXED)
          || $('body').hasClass(ClassName.FOOTER_MD_FIXED)
          || $('body').hasClass(ClassName.FOOTER_LG_FIXED)
          || $('body').hasClass(ClassName.FOOTER_XL_FIXED)
        ) {
          if ($(Selector.FOOTER).css("position") === "fixed") {
            sidebarHeight = heights.window - heights.header - heights.footer;
          }
        }

        $(Selector.CONTROL_SIDEBAR + ' ' + Selector.CONTROL_SIDEBAR_CONTENT).css('height', sidebarHeight)
        
        if (typeof $.fn.overlayScrollbars !== 'undefined') {
          $(Selector.CONTROL_SIDEBAR + ' ' + Selector.CONTROL_SIDEBAR_CONTENT).overlayScrollbars({
            className       : this._config.scrollbarTheme,
            sizeAutoCapable : true,
            scrollbars : {
              autoHide: this._config.scrollbarAutoHide, 
              clickScrolling : true
            }
          })
        }
      }
    }


    // Static

    static _jQueryInterface(operation) {
      return this.each(function () {
        let data = $(this).data(DATA_KEY)
        const _options = $.extend({}, Default, $(this).data())

        if (!data) {
          data = new ControlSidebar(this, _options)
          $(this).data(DATA_KEY, data)
        }

        if (data[operation] === 'undefined') {
          throw new Error(`${operation} is not a function`)
        }

        data[operation]()
      })
    }
  }

  /**
   *
   * Data Api implementation
   * ====================================================
   */
  $(document).on('click', Selector.DATA_TOGGLE, function (event) {
    event.preventDefault()

    ControlSidebar._jQueryInterface.call($(this), 'toggle')
  })

  /**
   * jQuery API
   * ====================================================
   */

  $.fn[NAME] = ControlSidebar._jQueryInterface
  $.fn[NAME].Constructor = ControlSidebar
  $.fn[NAME].noConflict  = function () {
    $.fn[NAME] = JQUERY_NO_CONFLICT
    return ControlSidebar._jQueryInterface
  }

  return ControlSidebar
})(jQuery)

export default ControlSidebar