Update:Remove node-cron dependency

server/libs/nodeCron/convert-expression/asterisk-to-range-conversion.js

@@ -0,0 +1,21 @@
+'use strict';
+module.exports = (() => {
+    function convertAsterisk(expression, replecement){
+        if(expression.indexOf('*') !== -1){
+            return expression.replace('*', replecement);
+        }
+        return expression;
+    }
+
+    function convertAsterisksToRanges(expressions){
+        expressions[0] = convertAsterisk(expressions[0], '0-59');
+        expressions[1] = convertAsterisk(expressions[1], '0-59');
+        expressions[2] = convertAsterisk(expressions[2], '0-23');
+        expressions[3] = convertAsterisk(expressions[3], '1-31');
+        expressions[4] = convertAsterisk(expressions[4], '1-12');
+        expressions[5] = convertAsterisk(expressions[5], '0-6');
+        return expressions;
+    }
+
+    return convertAsterisksToRanges;
+})();

server/libs/nodeCron/convert-expression/index.js

@@ -0,0 +1,69 @@
+'use strict';
+
+// SOURCE: https://github.com/node-cron/node-cron
+// LICENSE: https://github.com/node-cron/node-cron/blob/master/LICENSE.md
+
+const monthNamesConversion = require('./month-names-conversion');
+const weekDayNamesConversion = require('./week-day-names-conversion');
+const convertAsterisksToRanges = require('./asterisk-to-range-conversion');
+const convertRanges = require('./range-conversion');
+const convertSteps = require('./step-values-conversion');
+
+module.exports = (() => {
+
+    function appendSeccondExpression(expressions) {
+        if (expressions.length === 5) {
+            return ['0'].concat(expressions);
+        }
+        return expressions;
+    }
+
+    function removeSpaces(str) {
+        return str.replace(/\s{2,}/g, ' ').trim();
+    }
+
+    // Function that takes care of normalization.
+    function normalizeIntegers(expressions) {
+        for (let i = 0; i < expressions.length; i++) {
+            const numbers = expressions[i].split(',');
+            for (let j = 0; j < numbers.length; j++) {
+                numbers[j] = parseInt(numbers[j]);
+            }
+            expressions[i] = numbers;
+        }
+        return expressions;
+    }
+
+    /*
+   * The node-cron core allows only numbers (including multiple numbers e.g 1,2).
+   * This module is going to translate the month names, week day names and ranges
+   * to integers relatives.
+   *
+   * Month names example:
+   *  - expression 0 1 1 January,Sep *
+   *  - Will be translated to 0 1 1 1,9 *
+   *
+   * Week day names example:
+   *  - expression 0 1 1 2 Monday,Sat
+   *  - Will be translated to 0 1 1 1,5 *
+   *
+   * Ranges example:
+   *  - expression 1-5 * * * *
+   *  - Will be translated to 1,2,3,4,5 * * * *
+   */
+    function interprete(expression) {
+        let expressions = removeSpaces(expression).split(' ');
+        expressions = appendSeccondExpression(expressions);
+        expressions[4] = monthNamesConversion(expressions[4]);
+        expressions[5] = weekDayNamesConversion(expressions[5]);
+        expressions = convertAsterisksToRanges(expressions);
+        expressions = convertRanges(expressions);
+        expressions = convertSteps(expressions);
+
+        expressions = normalizeIntegers(expressions);
+
+        return expressions.join(' ');
+    }
+
+    return interprete;
+})();

server/libs/nodeCron/convert-expression/month-names-conversion.js

@@ -0,0 +1,22 @@
+'use strict';
+module.exports = (() => {
+    const months = ['january','february','march','april','may','june','july',
+        'august','september','october','november','december'];
+    const shortMonths = ['jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug',
+        'sep', 'oct', 'nov', 'dec'];
+
+    function convertMonthName(expression, items){
+        for(let i = 0; i < items.length; i++){
+            expression = expression.replace(new RegExp(items[i], 'gi'), parseInt(i, 10) + 1);
+        }
+        return expression;
+    }
+
+    function interprete(monthExpression){
+        monthExpression = convertMonthName(monthExpression, months);
+        monthExpression = convertMonthName(monthExpression, shortMonths);
+        return monthExpression;
+    }
+
+    return interprete;
+})();

server/libs/nodeCron/convert-expression/range-conversion.js

@@ -0,0 +1,39 @@
+'use strict';
+module.exports = ( () => {
+    function replaceWithRange(expression, text, init, end) {
+
+        const numbers = [];
+        let last = parseInt(end);
+        let first = parseInt(init);
+
+        if(first > last){
+            last = parseInt(init);
+            first = parseInt(end);
+        }
+
+        for(let i = first; i <= last; i++) {
+            numbers.push(i);
+        }
+
+        return expression.replace(new RegExp(text, 'i'), numbers.join());
+    }
+
+    function convertRange(expression){
+        const rangeRegEx = /(\d+)-(\d+)/;
+        let match = rangeRegEx.exec(expression);
+        while(match !== null && match.length > 0){
+            expression = replaceWithRange(expression, match[0], match[1], match[2]);
+            match = rangeRegEx.exec(expression);
+        }
+        return expression;
+    }
+
+    function convertAllRanges(expressions){
+        for(let i = 0; i < expressions.length; i++){
+            expressions[i] = convertRange(expressions[i]);
+        }
+        return expressions;
+    }
+
+    return convertAllRanges;
+})();

server/libs/nodeCron/convert-expression/step-values-conversion.js

@@ -0,0 +1,30 @@
+'use strict';
+
+module.exports = (() => {
+    function convertSteps(expressions){
+        var stepValuePattern = /^(.+)\/(\w+)$/;
+        for(var i = 0; i < expressions.length; i++){
+            var match = stepValuePattern.exec(expressions[i]);
+            var isStepValue = match !== null && match.length > 0;
+            if(isStepValue){
+                var baseDivider = match[2];
+                if(isNaN(baseDivider)){
+                    throw baseDivider + ' is not a valid step value';
+                }
+                var values = match[1].split(',');
+                var stepValues = [];
+                var divider = parseInt(baseDivider, 10);
+                for(var j = 0; j <= values.length; j++){
+                    var value = parseInt(values[j], 10);
+                    if(value % divider === 0){
+                        stepValues.push(value);
+                    }
+                }
+                expressions[i] = stepValues.join(',');
+            }
+        }
+        return expressions;
+    }
+
+    return convertSteps;
+})();

server/libs/nodeCron/convert-expression/week-day-names-conversion.js

@@ -0,0 +1,21 @@
+'use strict';
+module.exports = (() => {
+    const weekDays = ['sunday', 'monday', 'tuesday', 'wednesday', 'thursday',
+        'friday', 'saturday'];
+    const shortWeekDays = ['sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat'];
+
+    function convertWeekDayName(expression, items){
+        for(let i = 0; i < items.length; i++){
+            expression = expression.replace(new RegExp(items[i], 'gi'), parseInt(i, 10));
+        }
+        return expression;
+    }
+  
+    function convertWeekDays(expression){
+        expression = expression.replace('7', '0');
+        expression = convertWeekDayName(expression, weekDays);
+        return convertWeekDayName(expression, shortWeekDays);
+    }
+
+    return convertWeekDays;
+})();