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gaia/apps/clock/test/marionette/lib/utils.js

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+'use strict';
+
+var assert = require('assert');
+
+/**
+ * Extract a duration from any point in the given string. See the
+ * inline assertions below for expected usage.
+ *
+ * @return Duration found in milliseconds, or null if none found.
+ */
+exports.extractDuration = function(str) {
+  var match = /(?:(\d+):)?(\d+):(\d+)(?:[:.](\d)?(\d)?(\d)?)?/i.exec(str);
+  if (!match) { return null; }
+  var factors = [60 * 60 * 1000, 60 * 1000, 1000, 100, 10, 1];
+  return match.slice(1).reduce(function(sum, value, i) {
+    return sum + ((value || 0) * factors[i]);
+  }, 0);
+};
+
+assert.equal(exports.extractDuration('It took 0:00:00.000'), 0);
+assert.equal(exports.extractDuration('It took 00:00.1'), 100);
+assert.equal(exports.extractDuration('It took 1:00:00.010'), 3600010);
+assert.equal(exports.extractDuration('It took 1:05:10.050'), 3910050);
+assert.equal(exports.extractDuration('It took 30:22:22.55'), 109342550);
+
+/**
+ * Extract a time from any point in the given string. See the inline
+ * assertions below for expected usage.
+ *
+ * @return An object with { hours: N, minutes: N } in 24-hour format.
+ */
+function extractTime(str) {
+  var match = /\b([0-9]+):([0-9]+)\s*(am|pm|a\.m\.|p\.m\.)?/i.exec(str);
+  var hr = parseInt(match[1], 10);
+  var min = parseInt(match[2], 10);
+  var hasAmPm = !!match[3];
+  if (hasAmPm && /p/i.test(match[3])) {
+    if (hr < 12) {
+      hr += 12;
+    }
+  } else {
+    if (hr === 12) {
+      hr = 0;
+    }
+  }
+  return { hours: hr, minutes: min, hasAmPm: hasAmPm };
+}
+
+exports.assertStringContainsTime = function(str, date) {
+  var time = extractTime(str);
+  if (time.hasAmPm) {
+    assert.equal(time.hours, date.getHours());
+  } else {
+    assert.equal(time.hours % 12, date.getHours() % 12);
+  }
+  assert.equal(time.minutes, date.getMinutes());
+};
+
+exports.stringContainsTime = function(str, date) {
+  try {
+    exports.assertStringContainsTime(str, date);
+    return true;
+  } catch (e) {
+    return false;
+  }
+};
+
+exports.stringToDate = function(str) {
+  var time = extractTime(str);
+  var date = new Date();
+  date.setHours(time.hours);
+  date.setMinutes(time.minutes);
+  return date;
+};
+
+assert.deepEqual(extractTime('It is 12:30 PM.'),
+                 { hours: 12, minutes: 30, hasAmPm: true });
+assert.deepEqual(extractTime('It is 12:30 AM.'),
+                 { hours: 0, minutes: 30, hasAmPm: true });
+assert.deepEqual(extractTime('It is 15:22.'),
+                 { hours: 15, minutes: 22, hasAmPm: false });
+assert.deepEqual(extractTime('It is 0:00.'),
+                 { hours: 0, minutes: 0, hasAmPm: false });
+assert.deepEqual(extractTime('It is 6:00 p.m..'),
+                 { hours: 18, minutes: 0, hasAmPm: true });