silverstripe / deploynaut

		// We are aiming at the format:

		// [{text: 'optgroup text', children: [{id: '<sha>', text: '<inner text>'}]}]

		$redeploy = array();

		foreach($project->DNEnvironmentList() as $dnEnvironment) {

			$envName = $dnEnvironment->Name;

			$perEnvDeploys = array();

			foreach($dnEnvironment->DeployHistory() as $deploy) {

				$sha = $deploy->SHA;

				// Check if exists to make sure the newest deployment date is used.

				if(!isset($perEnvDeploys[$sha])) {

					$pastValue = sprintf("%s (deployed %s)",

						substr($sha, 0, 8),

						$deploy->obj('LastEdited')->Ago()

					);

					$perEnvDeploys[$sha] = array(

						'id' => $sha,

						'text' => $pastValue

					);

				}

			}

			if(!empty($perEnvDeploys)) {

				$redeploy[$envName] = array_values($perEnvDeploys);

			}

		}

		// Convert the array to the frontend format (i.e. keyed to regular array)

		foreach($redeploy as $env => $descr) {

			$data['field_data'][] = array('text'=>$env, 'children'=>$descr);

	 */

	protected function getGitPrevDeploys($project) {

		$redeploy = [];

		foreach($project->DNEnvironmentList() as $dnEnvironment) {

			$envName = $dnEnvironment->Name;

			$perEnvDeploys = [];

			foreach($dnEnvironment->DeployHistory() as $deploy) {

				$sha = $deploy->SHA;

				// Check if exists to make sure the newest deployment date is used.

				if(!isset($perEnvDeploys[$sha])) {

					$pastValue = sprintf(

						"%s (deployed %s)",

						substr($sha, 0, 8),

						$deploy->obj('LastEdited')->Ago()

					);

					$perEnvDeploys[$sha] = [

						'key' => $sha,

						'value' => $pastValue

					];

				}

			}

			if(!empty($perEnvDeploys)) {

				$redeploy[$envName] = array_values($perEnvDeploys);

			}

		}

		return $redeploy;

	}

}