[locations] Modularize additional column handling

Additional columns are now added through a hook,
moving specialized code where it belongs.

1 files changed, 24 insertions, 0 deletions

diff --git a/modules-available/locations/inc/abstractlocationcolumn.inc.php b/modules-available/locations/inc/abstractlocationcolumn.inc.php
new file mode 100644
index 00000000..9583429e
--- /dev/null
+++ b/modules-available/locations/inc/abstractlocationcolumn.inc.php
@@ -0,0 +1,24 @@
+<?php
+
+abstract class AbstractLocationColumn
+{
+
+	public abstract function getColumnHtml(int $locationId): string;
+
+	public abstract function getEditUrl(int $locationId): string;
+
+	public abstract function header(): string;
+
+	public abstract function priority(): int;
+
+	public function propagateColumn(): bool
+	{
+		return false;
+	}
+
+	public function propagateDefaultHtml(): string
+	{
+		return $this->getColumnHtml(0);
+	}
+
+}
\ No newline at end of file