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gaia/shared/js/input_parser.js

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+/* exported InputParser */
+'use strict';
+
+/**
+ * Stateless object for input parser functions..
+ * The intent is the methods here will only relate to the parsing
+ * of input[type="date|time"]
+ */
+var InputParser = (function() {
+
+  var InputParser = {
+    _dateParts: ['year', 'month', 'date'],
+    _timeParts: ['hours', 'minutes', 'seconds'],
+
+    /**
+     * Import HTML5 input[type="time"] string value
+     *
+     * @param {String} value 23:20:50.52, 17:39:57.
+     * @return {Object} { hours: 23, minutes: 20, seconds: 50 }.
+     */
+    importTime: function(value) {
+      var result = {
+        hours: 0,
+        minutes: 0,
+        seconds: 0
+      };
+
+      if (!value) {
+        return result;
+      }
+
+
+      var parts = value.split(':');
+      var part;
+      var partName;
+
+      var i = 0;
+      var len = InputParser._timeParts.length;
+
+      for (; i < len; i++) {
+        partName = InputParser._timeParts[i];
+        part = parts[i];
+        if (part) {
+          result[partName] = parseInt(part.slice(0, 2), 10) || 0;
+        }
+      }
+
+      return result;
+    },
+
+    /**
+     * Export date to HTML5 input[type="time"]
+     *
+     * @param {Date} value export value.
+     * @return {String} 17:39:57.
+     */
+    exportTime: function(value) {
+      return value.toLocaleString('en-US', {
+        hour12: false,
+        hour: '2-digit',
+        minute: '2-digit',
+        second: '2-digit'
+      });
+    },
+
+    /**
+     * Import HTML5 input[type="time"] to object.
+     *
+     * @param {String} value 1997-12-19.
+     * @return {Object} { year: 1997, month: 12, date: 19 }.
+     */
+    importDate: function(value) {
+      var result = {
+        year: 0,
+        month: 0,
+        date: 0
+      };
+
+      if (!value) {
+        return result;
+      }
+
+      var parts = value.split('-');
+      var part;
+      var partName;
+
+      var i = 0;
+      var len = InputParser._dateParts.length;
+
+      for (; i < len; i++) {
+        partName = InputParser._dateParts[i];
+        part = parts[i];
+        if (part) {
+          result[partName] = parseInt(part, 10);
+        }
+      }
+
+      if (result.month > 0) {
+        result.month = result.month - 1;
+      }
+
+      result.date = result.date || 1;
+
+      return result;
+    },
+
+    /**
+     * Export js local date to HTML5 input[type="date"].
+     *
+     * @param {Date} value export value.
+     * @return {String} date string (1997-12-19).
+     */
+    exportDate: function(value) {
+      var year = value.getFullYear();
+      var month = value.getMonth() + 1;
+      var day = value.getDate();
+
+      if (month < 10) {
+        month = `0${month}`;
+      }
+      if (day < 10) {
+        day = `0${day}`;
+      }
+      return `${year}-${month}-${day}`;
+    },
+
+    /**
+     * Designed to take a date & time value from
+     * html5 input types and returns a JS Date.
+     *
+     * @param {String} date input date.
+     * @param {String} time input time.
+     *
+     * @return {Date} full date object from date/time.
+     */
+    formatInputDate: function(date, time) {
+      time = InputParser.importTime(time);
+      date = InputParser.importDate(date);
+
+      return new Date(
+        date.year,
+        date.month,
+        date.date,
+        time.hours,
+        time.minutes,
+        time.seconds
+      );
+    },
+  };
+
+  return InputParser;
+}());