add sdk wrapper

app/Services/Import/Quickbooks/Contracts/SdkInterface.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace App\Services\Import\Quickbooks\Contracts;
+
+interface SdkInterface
+{
+    function getAuthorizationUrl(): string;
+    function accessToken(string $code, string $realm): array;
+    function refreshToken(): array;
+    function getAccessToken(): array;
+    function getRefreshToken(): array;
+    function totalRecords(string $entity): int;
+    function fetchRecords(string $entity, int $max): array;
+}

app/Services/Import/Quickbooks/SdkWrapper.php

@@ -0,0 +1,103 @@
+<?php
+
+namespace App\Services\Import\Quickbooks;
+
+use App\Services\Import\Quickbooks\Contracts\SdkInterface as QuickbooksInterface;
+
+final class SdkWrapper implements QuickbooksInterface
+{
+    
+    const MAXRESULTS = 10000;
+
+    private $sdk;
+    private $entities = ['Customer','Invoice','Payment','Item'];
+
+    public function __construct($sdk)
+    {
+        // Prep Data Services
+        $this->sdk = $sdk;
+    }
+
+    public function getAuthorizationUrl() : string 
+    {
+        return ($this->sdk->getOAuth2LoginHelper())->getAuthorizationCodeURL();
+
+    }
+
+    public function getAccessToken() : array
+    {
+        return $this->getTokens();
+    }
+
+    public function getRefreshToken(): array{
+        return $this->gettokens();
+    }
+
+    public function accessToken(string $code, string $realm) : array 
+    {
+        $token = ($this->sdk->getOAuth2LoginHelper())->exchangeAuthorizationCodeForToken($code,$realm);
+       
+        return $this->getTokens();
+    }
+
+    private function getTokens() : array {
+        
+        $token =($this->sdk->getOAuth2LoginHelper())->getAccessToken();
+        $access_token = $token->getAccessToken();
+        $refresh_token = $token->getRefreshToken();
+        $access_token_expires = $token->getAccessTokenExpiresAt();
+        $refresh_token_expires = $token->getRefreshTokenExpiresAt();
+
+        return compact('access_token', 'refresh_token','access_token_expires', 'refresh_token_expires');
+    }
+
+    public function refreshToken(): array
+    {
+        $token = ($this->sdk->getOAuth2LoginHelper())->refreshToken();
+        $this->sdk = $this->sdk->updateOAuth2Token($token);
+
+        return $this->getTokens();
+    }
+
+    public function handleCallbacks(array $data): void {
+
+    }
+
+    public function totalRecords(string $entity) : int {
+        return $this->sdk->Query("select count(*) from $entity");
+    }
+
+    private function queryData(string $query, int $start = 1, $limit = 100) : array 
+    {
+        return (array) $this->sdk->Query($query, $start, $limit);
+    }
+
+    public function fetchRecords( string $entity, int $max = 1000): array {
+        
+        if(!in_array($entity, $this->entities)) return [];
+        
+        $records = [];
+        $start = 1;
+        $limit = 100;
+        try {
+            $total = $this->totalRecords($entity);
+            $total = min($max, $total);
+            
+            // Step 3 & 4: Get chunks of records until the total required records are retrieved
+            do {
+                $limit = min(self::MAXRESULTS, $total - $start);
+                $recordsChunk = $this->queryData("select * from $entity", $start, $limit);
+                if(empty($recordsChunk)) break;
+
+                $records = array_merge($records,$recordsChunk);
+                $start += $limit;
+            } while ($start < $total);
+            if(empty($records)) throw new \Exceptions("No records retrieved!");
+
+        } catch (\Throwable $th) {
+            nlog("Fetch Quickbooks API Error: {$th->getMessage()}");
+        }
+
+        return $records;
+    }
+}