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Filename : toastify.js
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/*!
 * Toastify js 1.9.3
 * https://github.com/apvarun/toastify-js
 * @license MIT licensed
 *
 * Copyright (C) 2018 Varun A P
 */
(function(root, factory) {
  if (typeof module === "object" && module.exports) {
    module.exports = factory();
  } else {
    root.Toastify = factory();
  }
})(this, function(global) {
  // Object initialization
  var Toastify = function(options) {
      // Returning a new init object
      return new Toastify.lib.init(options);
    },
    // Library version
    version = "1.9.3";

  // Defining the prototype of the object
  Toastify.lib = Toastify.prototype = {
    toastify: version,

    constructor: Toastify,

    // Initializing the object with required parameters
    init: function(options) {
      // Verifying and validating the input object
      if (!options) {
        options = {};
      }

      // Creating the options object
      this.options = {};

      this.toastElement = null;

      // Validating the options
      this.options.text = options.text || "Hi there!"; // Display message
      this.options.node = options.node // Display content as node
      this.options.duration = options.duration === 0 ? 0 : options.duration || 3000; // Display duration
      this.options.selector = options.selector; // Parent selector
      this.options.callback = options.callback || function() {}; // Callback after display
      this.options.destination = options.destination; // On-click destination
      this.options.newWindow = options.newWindow || false; // Open destination in new window
      this.options.close = options.close || false; // Show toast close icon
      this.options.gravity = options.gravity === "bottom" ? "toastify-bottom" : "toastify-top"; // toast position - top or bottom
      this.options.positionLeft = options.positionLeft || false; // toast position - left or right
      this.options.position = options.position || ''; // toast position - left or right
      this.options.backgroundColor = options.backgroundColor; // toast background color
      this.options.avatar = options.avatar || ""; // img element src - url or a path
      this.options.className = options.className || ""; // additional class names for the toast
      this.options.stopOnFocus = options.stopOnFocus === undefined? true: options.stopOnFocus; // stop timeout on focus
      this.options.onClick = options.onClick; // Callback after click

      this.options.offset = options.offset || { x: 0, y: 0 }; // toast offset

      // Returning the current object for chaining functions
      return this;
    },

    // Building the DOM element
    buildToast: function() {
      // Validating if the options are defined
      if (!this.options) {
        throw "Toastify is not initialized";
      }

      // Creating the DOM object
      var divElement = document.createElement("div");
      divElement.className = "toastify on " + this.options.className;

      // Positioning toast to left or right or center
      if (!!this.options.position) {
        divElement.className += " toastify-" + this.options.position;
      } else {
        // To be depreciated in further versions
        if (this.options.positionLeft === true) {
          divElement.className += " toastify-left";
          console.warn('Property `positionLeft` will be depreciated in further versions. Please use `position` instead.')
        } else {
          // Default position
          divElement.className += " toastify-right";
        }
      }

      // Assigning gravity of element
      divElement.className += " " + this.options.gravity;

      if (this.options.backgroundColor) {
        divElement.style.background = this.options.backgroundColor;
      }

      // Adding the toast message/node
      if (this.options.node && this.options.node.nodeType === Node.ELEMENT_NODE) {
        // If we have a valid node, we insert it
        divElement.appendChild(this.options.node)
      } else {
        divElement.innerHTML = this.options.text;

        if (this.options.avatar !== "") {
          var avatarElement = document.createElement("img");
          avatarElement.src = this.options.avatar;

          avatarElement.className = "toastify-avatar";

          if (this.options.position == "left" || this.options.positionLeft === true) {
            // Adding close icon on the left of content
            divElement.appendChild(avatarElement);
          } else {
            // Adding close icon on the right of content
            divElement.insertAdjacentElement("afterbegin", avatarElement);
          }
        }
      }

      // Adding a close icon to the toast
      if (this.options.close === true) {
        // Create a span for close element
        var closeElement = document.createElement("span");
        closeElement.innerHTML = "&#10006;";

        closeElement.className = "toast-close";

        // Triggering the removal of toast from DOM on close click
        closeElement.addEventListener(
          "click",
          function(event) {
            event.stopPropagation();
            this.removeElement(this.toastElement);
            window.clearTimeout(this.toastElement.timeOutValue);
          }.bind(this)
        );

        //Calculating screen width
        var width = window.innerWidth > 0 ? window.innerWidth : screen.width;

        // Adding the close icon to the toast element
        // Display on the right if screen width is less than or equal to 360px
        if ((this.options.position == "left" || this.options.positionLeft === true) && width > 360) {
          // Adding close icon on the left of content
          divElement.insertAdjacentElement("afterbegin", closeElement);
        } else {
          // Adding close icon on the right of content
          divElement.appendChild(closeElement);
        }
      }

      // Clear timeout while toast is focused
      if (this.options.stopOnFocus && this.options.duration > 0) {
        var self = this;
        // stop countdown
        divElement.addEventListener(
          "mouseover",
          function(event) {
            window.clearTimeout(divElement.timeOutValue);
          }
        )
        // add back the timeout
        divElement.addEventListener(
          "mouseleave",
          function() {
            divElement.timeOutValue = window.setTimeout(
              function() {
                // Remove the toast from DOM
                self.removeElement(divElement);
              },
              self.options.duration
            )
          }
        )
      }
      
      // Adding an on-click destination path
      if (typeof this.options.destination !== "undefined") {
        divElement.addEventListener(
          "click",
          function(event) {
            event.stopPropagation();
            if (this.options.newWindow === true) {
              window.open(this.options.destination, "_blank");
            } else {
              window.location = this.options.destination;
            }
          }.bind(this)
        );
      }

      if (typeof this.options.onClick === "function" && typeof this.options.destination === "undefined") {
        divElement.addEventListener(
          "click",
          function(event) {
            event.stopPropagation();
            this.options.onClick();            
          }.bind(this)
        );
      }

      // Adding offset
      if(typeof this.options.offset === "object") {

        var x = getAxisOffsetAValue("x", this.options);
        var y = getAxisOffsetAValue("y", this.options);
        
        var xOffset = this.options.position == "left" ? x : "-" + x;
        var yOffset = this.options.gravity == "toastify-top" ? y : "-" + y;

        divElement.style.transform = "translate(" + xOffset + "," + yOffset + ")";

      }

      // Returning the generated element
      return divElement;
    },

    // Displaying the toast
    showToast: function() {
      // Creating the DOM object for the toast
      this.toastElement = this.buildToast();

      // Getting the root element to with the toast needs to be added
      var rootElement;
      if (typeof this.options.selector === "undefined") {
        rootElement = document.body;
      } else {
        rootElement = document.getElementById(this.options.selector);
      }

      // Validating if root element is present in DOM
      if (!rootElement) {
        throw "Root element is not defined";
      }

      // Adding the DOM element
      rootElement.insertBefore(this.toastElement, rootElement.firstChild);

      // Repositioning the toasts in case multiple toasts are present
      Toastify.reposition();

      if (this.options.duration > 0) {
        this.toastElement.timeOutValue = window.setTimeout(
          function() {
            // Remove the toast from DOM
            this.removeElement(this.toastElement);
          }.bind(this),
          this.options.duration
        ); // Binding `this` for function invocation
      }

      // Supporting function chaining
      return this;
    },

    hideToast: function() {
      if (this.toastElement.timeOutValue) {
        clearTimeout(this.toastElement.timeOutValue);
      }
      this.removeElement(this.toastElement);
    },

    // Removing the element from the DOM
    removeElement: function(toastElement) {
      // Hiding the element
      // toastElement.classList.remove("on");
      toastElement.className = toastElement.className.replace(" on", "");

      // Removing the element from DOM after transition end
      window.setTimeout(
        function() {
          // remove options node if any
          if (this.options.node && this.options.node.parentNode) {
            this.options.node.parentNode.removeChild(this.options.node);
          }

          // Remove the elemenf from the DOM, only when the parent node was not removed before.
          if (toastElement.parentNode) {
            toastElement.parentNode.removeChild(toastElement);
          }

          // Calling the callback function
          this.options.callback.call(toastElement);

          // Repositioning the toasts again
          Toastify.reposition();
        }.bind(this),
        400
      ); // Binding `this` for function invocation
    },
  };

  // Positioning the toasts on the DOM
  Toastify.reposition = function() {

    // Top margins with gravity
    var topLeftOffsetSize = {
      top: 15,
      bottom: 15,
    };
    var topRightOffsetSize = {
      top: 15,
      bottom: 15,
    };
    var offsetSize = {
      top: 15,
      bottom: 15,
    };

    // Get all toast messages on the DOM
    var allToasts = document.getElementsByClassName("toastify");

    var classUsed;

    // Modifying the position of each toast element
    for (var i = 0; i < allToasts.length; i++) {
      // Getting the applied gravity
      if (containsClass(allToasts[i], "toastify-top") === true) {
        classUsed = "toastify-top";
      } else {
        classUsed = "toastify-bottom";
      }

      var height = allToasts[i].offsetHeight;
      classUsed = classUsed.substr(9, classUsed.length-1)
      // Spacing between toasts
      var offset = 15;

      var width = window.innerWidth > 0 ? window.innerWidth : screen.width;

      // Show toast in center if screen with less than or qual to 360px
      if (width <= 360) {
        // Setting the position
        allToasts[i].style[classUsed] = offsetSize[classUsed] + "px";

        offsetSize[classUsed] += height + offset;
      } else {
        if (containsClass(allToasts[i], "toastify-left") === true) {
          // Setting the position
          allToasts[i].style[classUsed] = topLeftOffsetSize[classUsed] + "px";

          topLeftOffsetSize[classUsed] += height + offset;
        } else {
          // Setting the position
          allToasts[i].style[classUsed] = topRightOffsetSize[classUsed] + "px";

          topRightOffsetSize[classUsed] += height + offset;
        }
      }
    }

    // Supporting function chaining
    return this;
  };

  // Helper function to get offset.
  function getAxisOffsetAValue(axis, options) {

    if(options.offset[axis]) {
      if(isNaN(options.offset[axis])) {
        return options.offset[axis];
      }
      else {
        return options.offset[axis] + 'px';
      }
    }

    return '0px';

  }

  function containsClass(elem, yourClass) {
    if (!elem || typeof yourClass !== "string") {
      return false;
    } else if (
      elem.className &&
      elem.className
        .trim()
        .split(/\s+/gi)
        .indexOf(yourClass) > -1
    ) {
      return true;
    } else {
      return false;
    }
  }

  // Setting up the prototype for the init object
  Toastify.lib.init.prototype = Toastify.lib;

  // Returning the Toastify function to be assigned to the window object/module
  return Toastify;
});