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  5. koreUtil Libraries

koreUtil Libraries

koreUtil libraries provide pre-written JavaScript functions which makes common or complex tasks easy to implement. These libraries often target specific tasks such as setting up recurring rules for calendar, parsing and manipulation of dates, conversion of dates between timezone, tools to simplify programming with strings, numbers, arrays, functions and objects etc.

How to Use

koreUtil libraries can be used anywhere in the bot where there is a flexibility to write JavaScript code such as script node, message node, confirmation node, entity node, standard responses, answers to FAQs, small talk, event handlers etc.

List of koreUtil libraries

Below is the list of koreUtil libraries provided by the platform:

koreUtil.rrule

koreUtil.rrule is platform offered JS library for creating new recurrence rules, interpreting and reading them in human readable format. This library is backed by rrule npm module version 2.2.0 installed on Kore.ai server. For more details on using rrule refer here.

Usage Example:
context.rule = new koreUtil.rrule({
freq: koreUtil.rrule.WEEKLY,
interval: 5,
byweekday: [koreUtil.rrule.MO, koreUtil.rrule.FR],
dtstart: new Date(2012, 1, 1, 10, 30),
until: new Date(2012, 12, 31)
});

context.between=context.rule.between(new Date(2012, 7, 1), new Date(2012, 8, 1));
context.readableFormat=context.rule.toText();

Output:

  • For context.between
    [
    "2012-08-27T10:30:00.000Z",
    "2012-08-31T10:30:00.000Z"
    ]
  • For context.readableFormat
    every 5 weeks on Monday, Friday until January 31, 2013

koreUtil.moment

koreUtil.moment is platform offered JS library for validating, manipulating, and formatting dates. This library is backed by moment npm module version 2.19.2 installed on Kore.ai server. For more details on using moment refer here.

Usage Example:
context.german=koreUtil.moment().locale('de').format('LLLL');

Output:
For context.german:
Montag, 18. November 2019 01:43

koreUtil.intl

koreUtil.intl is platform offered JS library for language specific string comparison, number formatting, and date and time formatting. This library is backed by intl npm module version 1.2.5 installed on Kore.ai server. For more details on using intl refer here.

Usage Example:
context.formattedNumberUK = koreUtil.intl.NumberFormat('en-GB').format(123456.789);
var date = new Date(Date.UTC(2012, 11, 20, 3, 0, 0));
context.USdate=koreUtil.intl.DateTimeFormat('en-US').format(date);

Output:

  • For context.formattedNumberUK:
    123,456.789
  • For context.USdate
    12/20/2012

koreUtil.momenttz

koreUtil.momenttz is platform offered JS library for formatting of dates in any timezone and convert dates between timezones. This library is backed by moment-timezone npm module version 0.4.1 installed on Kore.ai server is 0.4.1. For more details on using momenttz refer here.

Usage Example:
var jun = koreUtil.moment("2014-06-01T12:00:00Z");
context.newyork= koreUtil.momenttz(jun,'America/New_York').format('ha z');
context.tokyo = koreUtil.moment().tz('Asia/Tokyo').format('ha z');
context.sydney = koreUtil.moment().tz('Australia/Sydney').format('ha z');

Output:

  • For context.newyork:
    5am PDT
  • For context.tokyo:
    7pm JST
  • For context.sydney:
    9pm AEDT

koreUtil.xml2js

koreUtil.xml2js is platform offered JS library for parsing xml to json and vice versa. This library is backed by xml2js npm version 0.4.19 installed on Kore.ai server. More details on using xml2js refer here.

Usage Example:
var obj = {name: "John", Surname: "Doe", age: 23};
var builder = new koreUtil.xml2js.Builder();
context.xml = builder.buildObject(obj);

Output:

  • For context.xml:
    John Doe 23

koreUtil.hash

koreUtil.hash is platform offered JS library that supports SHA on JavaScript. The library is backed by sha.js npm module version 2.4.9 installed on Kore.ai server. For more details refer here.

Usage Example:
context.hashString= koreUtil.hash('sha256').update('42').digest('hex');

Output:

  • For context.hashString:
    73475cb40a568e8da8a045ced110137e159f890ac4da883b6b17dc651b3a8049

koreUtil._

koreUtil._ is a platform offered JS library which provides utility functions for common programming tasks. This library is backed by lodash.js npm module version 3.10.1 installed on Kore.ai server. For more details refer here.

Usage Example:
context.chunkArray = koreUtil._.chunk(['a', 'b', 'c', 'd'], 2);
var users = [
{ 'user': 'barney', 'age': 36, 'active': true },
{ 'user': 'fred', 'age': 40, 'active': false }
];
context.filterActive =koreUtil._.pluck(koreUtil._.filter(users, { 'age': 36, 'active': true }), 'user');

Output:

  • For context.chunkArray:
    [["a","b"],["c","d"]]
  • For context.filterActive:
    [
    "barney"
    ]

koreUtil.getCurrentOptions

koreUtil.getCurrentOptions is a platform offered JS library which provides utility functions to get the current template for language selection standard response options. This can be used to customize the standard response. Following is the return format for each of the situations:

  • For the language selection standard response:
    {"list_of_languages": [
       {"title": "English","value": "English"},
       {"title": "Deutsche","value": "Deutsche"},
       {"title": "Español","value": "Español"}
    ]}
  • For the language ambiguity standard response:
    {"current_language": "Español",
          "list_of_new_languages": [
             {"title": "English","value": "English"},
             {"title": "Deutsche","value": "Deutsche"},
             {"title": "Español","value": "Español"}
      ]}
  • For the language switch standard response:
    {"new_language": "Español","current_language": "English"}

Following are the usage examples of how the above utility can be used to render the message in a button template, you can use any template as per your requirements.  See here for more on message templates.

Usage Example 1: To get the standard response for “Ask if the user would like to select any of the languages

var info = koreUtil.getCurrentOptions();
var message = {
  "type": "template",
  "payload": {
    "template_type": "button",
    "text": "please select your laguage",
    "subText": "Button Template Description",
    "buttons": []
    }
  };
for (i = 0; i < info.list_of_languages.length; i++) {
  var button = {
    "type": "postback",
    "title": info.list_of_languages[i].title,
    "payload": info.list_of_languages[i].value
    };

  message.payload.buttons.push(button);
 }
print(JSON.stringify(message));

Usage Example 2: To get the standard response for “Ask if the user would like to switch to any of the new languages detected during a conversation

var info = koreUtil.getCurrentOptions();
var message = {
    "type": "template",
    "payload": {
        "template_type": "button",
        "text": "language abiguity response for the current language" + info.current_language,
        "subText": "Button Template Description",
        "buttons": []
    }
};
for (i = 0; i < info.list_of_new_languages.length; i++) {
    var button = {
        "type": "postback",
        "title": info.list_of_new_languages[i].title,
        "payload": info.list_of_new_languages[i].value
    };

    message.payload.buttons.push(button);
}
print(JSON.stringify(message));

Usage Example 3: To get the standard response for “Ask if the user would like to switch to any of the new languages detected during a conversation

var info = koreUtil.getCurrentOptions();
var message = {
    "type": "template",
    "payload": {
        "template_type": "button",
        "text": "would you like to switch to new language detected: current language " + info.current_language + "new language : " + info.new_language,
        "subText": "Button Template Description",
        "buttons": []
    }
};
var options = ["yes", "no"]
for (i = 0; i < options.length; i++) {
    var button = {
        "type": "postback",
        "title": options[i],
        "payload": options[i]
    };
    message.payload.buttons.push(button);
}
print(JSON.stringify(message));
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