Merge pull request #7 from defrag/precise-date-fix

Fixing precise date calculations

Author: norberttech

spec/Coduo/PHPHumanizer/DateTimeSpec.php

@@ -70,10 +70,11 @@ function it_humanizes_precise_difference_between_dates()
             array("2014-04-26 13:00:00", "2014-04-26 12:58:15", '1 minute, 45 seconds ago'),
             array("2014-04-26 13:00:00", "2014-04-26 11:20:00", '1 hour, 40 minutes ago'),
             array("2014-04-26 13:00:00", "2014-04-27 13:15:00", '1 day, 15 minutes from now'),
-            array("2014-04-26 13:00:00", "2014-05-03 15:00:00", '1 week, 2 hours from now'),
-            array("2014-04-26 13:00:00", "2015-04-28 17:00:00", '1 year, 1 week, 4 days, 4 hours from now'),
+            array("2014-04-26 13:00:00", "2014-05-03 15:00:00", '7 days, 2 hours from now'),
+            array("2014-04-26 13:00:00", "2015-04-28 17:00:00", '1 year, 2 days, 4 hours from now'),
             array("2014-04-26 13:00:00", "2014-04-28 23:00:00", '2 days, 10 hours from now'),
             array("2014-04-26 13:00:00", "2014-04-25 11:20:00", '1 day, 1 hour, 40 minutes ago'),
+            array("2014-04-26 13:00:00", "2016-04-27 13:00:00", '2 years, 1 day from now'),
         );
 
         foreach ($examples as $example) {

src/Coduo/PHPHumanizer/DateTime/PreciseDifference.php

@@ -55,32 +55,21 @@ private function calculate()
         $units = array(
             new Year(),
             new Month(),
-            new Week(),
             new Day(),
             new Hour(),
             new Minute(),
             new Second(),
         );
 
-        $absoluteMilliSecondsDiff = abs($this->toDate->getTimestamp() - $this->fromDate->getTimestamp()) * 1000;
+        $diff = $this->fromDate->diff($this->toDate);
 
         foreach ($units as $unit) {
-            if ($absoluteMilliSecondsDiff >= $unit->getMilliseconds()) {
-                $this->units[] = $unit;
-            }
-        }
-
-        foreach ($this->units as $unit) {
-            $quantity = (int) floor($absoluteMilliSecondsDiff / $unit->getMilliseconds());
 
-            if ($quantity === 0) {
-                continue;
+            if ($diff->{$unit->getDateIntervalSymbol()} > 0) {
+                $this->units[] = $unit;
+                $this->compoundResults[] = new CompoundResult($unit, $diff->{$unit->getDateIntervalSymbol()});
             }
-
-            $this->compoundResults[] = new CompoundResult($unit, $quantity);
-            $absoluteMilliSecondsDiff -= ($quantity * $unit->getMilliseconds());
         }
-
     }
 
     public function isPast()

src/Coduo/PHPHumanizer/DateTime/Unit.php

@@ -15,4 +15,11 @@ public function getName();
      * @return int
      */
     public function getMilliseconds();
+
+    /**
+     * Returns symbol of \DateInterval equivalent
+     *
+     * @return string
+     */
+    public function getDateIntervalSymbol();
 }

src/Coduo/PHPHumanizer/DateTime/Unit/Day.php

@@ -19,4 +19,9 @@ public function getMilliseconds()
         $hour = new Hour();
         return $hour->getMilliseconds() * 24;
     }
+
+    public function getDateIntervalSymbol()
+    {
+        return 'd';
+    }
 }

src/Coduo/PHPHumanizer/DateTime/Unit/Hour.php

@@ -19,4 +19,9 @@ public function getMilliseconds()
         $minute = new Minute();
         return $minute->getMilliseconds() * 60;
     }
+
+    public function getDateIntervalSymbol()
+    {
+        return 'h';
+    }
 }

src/Coduo/PHPHumanizer/DateTime/Unit/JustNow.php

@@ -18,4 +18,9 @@ public function getMilliseconds()
     {
         return 0;
     }
+
+    public function getDateIntervalSymbol()
+    {
+        throw new \RuntimeException("JustNow doesn't have date interval symbol equivalent");
+    }
 }

src/Coduo/PHPHumanizer/DateTime/Unit/Minute.php

@@ -20,4 +20,9 @@ public function getMilliseconds()
 
         return $second->getMilliseconds() * 60;
     }
+
+    public function getDateIntervalSymbol()
+    {
+        return 'i';
+    }
 }

src/Coduo/PHPHumanizer/DateTime/Unit/Month.php

@@ -19,4 +19,9 @@ public function getMilliseconds()
         $day = new Day();
         return $day->getMilliseconds() * 30;
     }
+
+    public function getDateIntervalSymbol()
+    {
+        return 'm';
+    }
 }

src/Coduo/PHPHumanizer/DateTime/Unit/Second.php

@@ -18,4 +18,9 @@ public function getMilliseconds()
     {
         return 1000;
     }
+
+    public function getDateIntervalSymbol()
+    {
+        return 's';
+    }
 }

src/Coduo/PHPHumanizer/DateTime/Unit/Week.php

@@ -19,4 +19,9 @@ public function getMilliseconds()
         $day = new Day();
         return $day->getMilliseconds() * 7;
     }
+
+    public function getDateIntervalSymbol()
+    {
+        throw new \RuntimeException("Week doesn't have date interval symbol equivalent");
+    }
 }