Convert procedural code into class for Blobs - php

Question

So I have the following code that I built out that grabs some images from an Azure storage library:
$accountName = 'teststorageaccount';
$accountKey = '**';
$containerName = 'users';
$connectionString = "DefaultEndpointsProtocol=http;AccountName={$accountName};AccountKey={$accountKey}";
$blobClient = ServicesBuilder::getInstance()->createBlobService($connectionString);
try {
$blob_list = $blobClient->listBlobs($containerName);
$blobs = $blob_list->getBlobs();
// Grab all the blob links
foreach ($blobs as $blob) {
echo $blob->getUrl() . "</br>";
}
} catch(ServiceException $e) {
$code = $e->getCode();
$error_message = $e->getMessage();
echo $code.": ".$error_message."<br />";
}
Then I'm getting the following results back:
http://teststorageaccount.blob.core.windows.net/users/ABREUG.jpg
http://teststorageaccount.blob.core.windows.net/users/ABUKHADA.jpg
http://teststorageaccount.blob.core.windows.net/users/ACHANT.jpg
http://teststorageaccount.blob.core.windows.net/users/ACQUISTE.jpg
Now this is where I would need some help .. I'm practicing on building out everything in a class, and this is how far I've come:
class AzureStorage
{
private $accountName;
private $accountKey;
private $containerName;
public static function init()
{
return new AzureStorage([
'accountName' => 'teststorageaccount',
'accountKey' => '***',
'containerName' => 'users',
]);
}
/**************************************************************************/
public function __construct(array $data = [])
{
if (count($data) === 0) {
return;
}
$this->load($data);
}
public function load(array $data) : void
{
if (isset($data['accountName'])) {
$this->accountName = $data['accountName'];
}
if (isset($data['accountKey'])) {
$this->accountKey = $data['accountKey'];
}
if (isset($data['containerName'])) {
$this->containerName = $data['containerName'];
}
}
public function connect()
{
$connectionString = "DefaultEndpointsProtocol=https;AccountName={$this->accountName};AccountKey={$this->accountKey}";
$blobClient = ServicesBuilder::getInstance()->createBlobService($connectionString);
return $blobClient;
}
public function getContainers() : array
{
$containers = $this->connect()->listContainers();
return $containers->getContainers();
}
public function getBlobURLs()
{
try {
$blob_list = $this->connect()->listBlobs($this->containerName);
$blobs = $blob_list->getBlobs();
// Grab all the blob links
foreach ($blobs as $blob) {
echo $blob->getUrl() . "</br>";
}
} catch (ServiceException $e) {
$code = $e->getCode();
$error_message = $e->getMessage();
echo $code.": ".$error_message."<br />";
}
}
}
The problem: How would I be able to use the try and catch inside the getBlobURLs method and then output the results? I'm unable to get results when calling it outside the class.
Here is what I'm doing:
$test2 = new \AzureStorage\AzureStorage([
'accountName' => 'teststorageaccount',
'accountKey' => '***',
'containerName' => 'users',
]);
Now if I call the following (I get an array of containers, which works perfectly):
$containers = $test2->getContainers();
//var_dump($containers);
But if I do the following (I get no results outputted back):
$blobs = $test2->getBlobURLs();
var_dump($blobs);
Does anyone know why I might not be getting the URLs back?

Answer 1

You do have a return statement in getContainers function but not in getBlobURLs.
public function getBlobURLs(){
try {
$blob_list = $this->connect()->listBlobs($this->containerName);
$blobs = $blob_list->getBlobs();
$blobUrls = [];
// Grab all the blob links
foreach ($blobs as $blob) {
$blobUrls[] = $blob->getUrl();
}
return $blobUrls;
} catch (ServiceException $e) {
return false;
}
}
Now if you want to display blob url list then
$blobs = $test2->getBlobURLs();
if($blobs === false){
echo 'Error while getting blob urls.';
}
else{
foreach($blobs as $blobUrl){
echo $blobUrl . "</br>";
}
}