Created date/time view helper to eliminate redundant logic in export templates.

module/VuFind/src/VuFind/Theme/Root/Helper/DateTime.php

+<?php
+/**
+ * View helper for formatting dates and times.
+ *
+ * PHP version 5
+ *
+ * Copyright (C) Villanova University 2010.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * @category VuFind2
+ * @package  View_Helpers
+ * @author   Demian Katz <demian.katz@villanova.edu>
+ * @license  http://opensource.org/licenses/gpl-2.0.php GNU General Public License
+ * @link     http://vufind.org/wiki/building_a_recommendations_module Wiki
+ */
+namespace VuFind\Theme\Root\Helper;
+use VuFind\Date\Converter as DateConverter, Zend\View\Helper\AbstractHelper;
+
+/**
+ * View helper for formatting dates and times
+ *
+ * @category VuFind2
+ * @package  View_Helpers
+ * @author   Demian Katz <demian.katz@villanova.edu>
+ * @license  http://opensource.org/licenses/gpl-2.0.php GNU General Public License
+ * @link     http://vufind.org/wiki/building_a_recommendations_module Wiki
+ */
+class DateTime extends AbstractHelper
+{
+    protected $converter;
+
+    /**
+     * Constructor
+     */
+    public function __construct()
+    {
+        $this->converter = new DateConverter();
+    }
+
+    /**
+     * Extract a year from a human-readable date.  Return false if no year can
+     * be found.
+     *
+     * @param string $date Date to reformat
+     *
+     * @return string|bool
+     */
+    public function extractYear($date)
+    {
+        try {
+            return $this->converter->convertFromDisplayDate('Y', $date);
+        } catch (\VuFind\Exception\Date $e) {
+            // bad date? just ignore it!
+            return false;
+        }
+    }
+}
\ No newline at end of file

themes/root/templates/RecordDriver/AbstractBase/export-bibtex.phtml

@@ -79,15 +79,11 @@ if (is_array($pubPlaces) && is_array($pubDates) && is_array($pubNames)) {
         }
         $date = trim($pubDates[$i], '[]. ');
         if (strlen($date) > 4) {
-            try {
-                $converter = new \VuFind\Date\Converter();
-                $date = $converter->convertFromDisplayDate('Y', $date);
-            } catch (\VuFind\Exception\Date $e) {
-                // bad date? just ignore it!
-                continue;
-            }
+            $date = $this->dateTime()->extractYear($date);
+        }
+        if ($date) {
+            echo "year = $date,\n";
         }
-        echo "year = $date,\n";
     }
 }
 

themes/root/templates/RecordDriver/AbstractBase/export-endnote.phtml

@@ -34,15 +34,11 @@ if (is_array($pubPlaces) && is_array($pubDates) && is_array($pubNames)) {
         }
         $date = trim($pubDates[$i], '[]. ');
         if (strlen($date) > 4) {
-            try {
-                $converter = new \VuFind\Date\Converter();
-                $date = $converter->convertFromDisplayDate('Y', $date);
-            } catch (\VuFind\Exception\Date $e) {
-                // bad date? just ignore it!
-                continue;
-            }
+            $date = $this->dateTime()->extractYear($date);
+        }
+        if ($date) {
+            echo "%D $date\n";
         }
-        echo "%D $date\n";
         if (isset($pubPlaces[$i])) {
             echo "%C " . rtrim(str_replace(array('[', ']'), '', $pubPlaces[$i]), ': '). "\n";
         }

themes/root/templates/RecordDriver/AbstractBase/export-refworks.phtml

@@ -75,15 +75,11 @@ if (is_array($pubPlaces) && is_array($pubDates) && is_array($pubNames)) {
         }
         $date = trim($pubDates[$i], '[]. ');
         if (strlen($date) > 4) {
-            try {
-                $converter = new \VuFind\Date\Converter();
-                $date = $converter->convertFromDisplayDate('Y', $date);
-            } catch (\VuFind\Exception\Date $e) {
-                // bad date? just ignore it!
-                continue;
-            }
+            $date = $this->dateTime()->extractYear($date);
+        }
+        if ($date) {
+            echo "YR $date\n";
         }
-        echo "YR $date\n";
     }
 }
 

themes/root/theme.ini

@@ -10,6 +10,7 @@ helpers_to_register[] = "Cart"
 helpers_to_register[] = "Citation"
 helpers_to_register[] = "Context"
 helpers_to_register[] = "CurrentPath"
+helpers_to_register[] = "DateTime"
 helpers_to_register[] = "DisplayDateFormat"
 helpers_to_register[] = "DisplayLanguageOption"
 helpers_to_register[] = "Excerpt"