Fix the détection of bad publication date. fix #245

The previous one was based on the fact that the PHP version used was 64bits and so the unix timestamp could go way back.

With a 32bits PHP that's not the case.  Check the notes in http://php.net/manual/en/function.strtotime.php for more information.

OPDS_renderer.php

@@ -173,6 +173,16 @@ class OPDSRenderer
         self::getXmlStream ()->endElement ();
     }
 
+    private function getPublicationDate($book) {
+        $dateYmd = substr($book->pubdate, 0, 10);
+        $pubdate = \DateTime::createFromFormat('Y-m-d', $dateYmd);
+        if ($pubdate === false ||
+            $pubdate->format ("Y") == "0101" ||
+            $pubdate->format ("Y") == "0100") {
+            return "";
+        }
+        return $pubdate->format("Y-m-d");
+    }
 
     private function renderEntry ($entry) {
         self::getXmlStream ()->startElement ("title");
@@ -218,10 +228,10 @@ class OPDSRenderer
         }
         if ($entry->book->getPubDate () != "") {
             self::getXmlStream ()->startElement ("dcterms:issued");
-                self::getXmlStream ()->text (date ("Y-m-d", $entry->book->pubdate));
+                self::getXmlStream ()->text (self::getPublicationDate($entry->book));
             self::getXmlStream ()->endElement ();
             self::getXmlStream ()->startElement ("published");
-                self::getXmlStream ()->text (date ("Y-m-d", $entry->book->pubdate) . "T08:08:08Z");
+                self::getXmlStream ()->text (self::getPublicationDate($entry->book) . "T08:08:08Z");
             self::getXmlStream ()->endElement ();
         }
 

book.php

@@ -94,7 +94,7 @@ class Book extends Base {
         $this->id = $line->id;
         $this->title = $line->title;
         $this->timestamp = strtotime ($line->timestamp);
-        $this->pubdate = strtotime ($line->pubdate);
+        $this->pubdate = $line->pubdate;
         $this->path = Base::getDbDirectory () . $line->path;
         $this->relativePath = $line->path;
         $this->seriesIndex = $line->series_index;
@@ -265,12 +265,14 @@ class Book extends Base {
     }
 
     public function getPubDate () {
-        if (is_null ($this->pubdate) || ($this->pubdate <= -58979923200)) {
+        if (empty ($this->pubdate)) {
             return "";
         }
-        else {
+        $dateY = (int) substr($this->pubdate, 0, 4);
-            return date ("Y", $this->pubdate);
+        if ($dateY > 102) {
+            return str_pad($dateY, 4, "0", STR_PAD_LEFT);
         }
+        return "";
     }
 
     public function getComment ($withSerie = true) {

test/bookTest.php

@@ -173,6 +173,27 @@ class BookTest extends PHPUnit_Framework_TestCase
         $this->assertCount (15, $entryArray);
     }
 
+    /**
+     * @dataProvider providerPublicationDate
+     */
+    public function testGetPubDate ($pubdate, $expectedYear)
+    {
+        $book = Book::getBookById(2);
+        $book->pubdate = $pubdate;
+        $this->assertEquals($expectedYear, $book->getPubDate());
+    }
+
+    public function providerPublicationDate() {
+        return array(
+            array('2010-10-05 22:00:00+00:00', '2010'),
+            array('1982-11-15 13:05:29.908657+00:00', '1982'),
+            array('1562-10-05 00:00:00+00:00', '1562'),
+            array('0100-12-31 23:00:00+00:00', ''),
+            array('', ''),
+            array(NULL, '')
+            );
+    }
+
     public function testGetBookById ()
     {
         // also check most of book's class methods