From 8a9e07591433cb40e6eaf2762be27f35bd165373 Mon Sep 17 00:00:00 2001
From: Peter Thaleikis <petert@catalyst.net.nz>
Date: Thu, 10 Sep 2015 21:30:10 +1200
Subject: [PATCH 1/3] Allowing to refer to external links from a modeladmin

---
 code/GridFieldExternalLink.php     | 67 ++++++++++++++++++++++++++++++
 templates/GridFieldExternalLink.ss |  1 +
 2 files changed, 68 insertions(+)
 create mode 100644 code/GridFieldExternalLink.php
 create mode 100644 templates/GridFieldExternalLink.ss

diff --git a/code/GridFieldExternalLink.php b/code/GridFieldExternalLink.php
new file mode 100644
index 00000000..94c970bc
--- /dev/null
+++ b/code/GridFieldExternalLink.php
@@ -0,0 +1,67 @@
+<?php
+/**
+ * Displays a link to an external source referenced 'external link'
+ */
+class GridFieldExternalLink extends GridFieldDataColumns {
+
+	/**
+	 * Add a column for the actions
+	 *
+	 * @param type $gridField
+	 * @param array $columns
+	 */
+	public function augmentColumns($gridField, &$columns) {
+		if(!in_array('Actions', $columns)) $columns[] = 'Actions';
+	}
+
+	/**
+	 * Return any special attributes that will be used for FormField::create_tag()
+	 *
+	 * @param GridField $gridField
+	 * @param DataObject $record
+	 * @param string $columnName
+	 * @return array
+	 */
+	public function getColumnAttributes($gridField, $record, $columnName) {
+		return array('class' => 'col-buttons');
+	}
+
+	/**
+	 * Add the title
+	 *
+	 * @param GridField $gridField
+	 * @param string $columnName
+	 * @return array
+	 */
+	public function getColumnMetadata($gridField, $columnName) {
+		if($columnName == 'Actions') {
+			return array('title' => '');
+		}
+		return array();
+	}
+
+	/**
+	 * Which columns are handled by this component
+	 *
+	 * @param type $gridField
+	 * @return type
+	 */
+	public function getColumnsHandled($gridField) {
+		return array('Actions');
+	}
+
+	/**
+	 * @param GridField $gridField
+	 * @param DataObject $record
+	 * @param string $columnName
+	 *
+	 * @return string - the HTML for the column
+	 */
+	public function getColumnContent($gridField, $record, $columnName) {
+		$data = new ArrayData(array(
+			'Link' => method_exists($record, 'getExternalLink') ? $record->getExternalLink() : $record->ExternalLink
+		));
+
+		return $data->renderWith('GridFieldExternalLink');
+	}
+}
diff --git a/templates/GridFieldExternalLink.ss b/templates/GridFieldExternalLink.ss
new file mode 100644
index 00000000..52013e64
--- /dev/null
+++ b/templates/GridFieldExternalLink.ss
@@ -0,0 +1 @@
+<a href="$Link" target="_blank" title="<% _t('GridFieldExtensions.ExternalLink','External Link') %>"><% _t('GridFieldExtensions.ExternalLink','External Link') %></a>

From 9a253f27f271af0e752334369709b889e7dfc742 Mon Sep 17 00:00:00 2001
From: Peter Thaleikis <petert@catalyst.net.nz>
Date: Mon, 14 Sep 2015 17:15:45 +1200
Subject: [PATCH 2/3] using hasmethod instead of method_exists

---
 code/GridFieldExternalLink.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/code/GridFieldExternalLink.php b/code/GridFieldExternalLink.php
index 94c970bc..0c0e2820 100644
--- a/code/GridFieldExternalLink.php
+++ b/code/GridFieldExternalLink.php
@@ -59,7 +59,7 @@ public function getColumnsHandled($gridField) {
 	 */
 	public function getColumnContent($gridField, $record, $columnName) {
 		$data = new ArrayData(array(
-			'Link' => method_exists($record, 'getExternalLink') ? $record->getExternalLink() : $record->ExternalLink
+			'Link' => $record->hasMethod('getExternalLink') ? $record->getExternalLink() : $record->ExternalLink
 		));
 
 		return $data->renderWith('GridFieldExternalLink');

From 4c8009ad02735085d6508911634decfc6425a59e Mon Sep 17 00:00:00 2001
From: Peter Thaleikis <petert@catalyst.net.nz>
Date: Mon, 14 Sep 2015 17:17:23 +1200
Subject: [PATCH 3/3] Adding possibility to define a custom text for the link

---
 code/GridFieldExternalLink.php     | 3 ++-
 templates/GridFieldExternalLink.ss | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/code/GridFieldExternalLink.php b/code/GridFieldExternalLink.php
index 0c0e2820..cb54f2ec 100644
--- a/code/GridFieldExternalLink.php
+++ b/code/GridFieldExternalLink.php
@@ -59,7 +59,8 @@ public function getColumnsHandled($gridField) {
 	 */
 	public function getColumnContent($gridField, $record, $columnName) {
 		$data = new ArrayData(array(
-			'Link' => $record->hasMethod('getExternalLink') ? $record->getExternalLink() : $record->ExternalLink
+			'Link' => $record->hasMethod('getExternalLink') ? $record->getExternalLink() : $record->ExternalLink,
+			'Text' => $record->hasMethod('getExternalLinkText') ? $record->getExternalLinkText() : 'External Link'
 		));
 
 		return $data->renderWith('GridFieldExternalLink');
diff --git a/templates/GridFieldExternalLink.ss b/templates/GridFieldExternalLink.ss
index 52013e64..cf820246 100644
--- a/templates/GridFieldExternalLink.ss
+++ b/templates/GridFieldExternalLink.ss
@@ -1 +1 @@
-<a href="$Link" target="_blank" title="<% _t('GridFieldExtensions.ExternalLink','External Link') %>"><% _t('GridFieldExtensions.ExternalLink','External Link') %></a>
+<a href="$Link" target="_blank" title="$Text">$Text</a>