Feature/graph endpoint support (#1)

Graph schema documentation

Author: LaravelFreelancerNL

README.md

@@ -90,6 +90,7 @@ $client->transactions()->begin(['write' => ['users', 'teams']]);
     3) [Collection schema](docs/schema-collections.md)
     4) [Index schema](docs/schema-indexes.md)
     5) [View schema](docs/schema-views.md)
+    6) [Graph schema](docs/schema-graphs.md)
 5) [Transaction manager](docs/transaction-manager.md)
 
 ## Related packages

docs/schema-graphs.md

@@ -0,0 +1,104 @@
+# Schema manager - Graphs
+You can use the schema manager to perform CRUD actions on named graphs.
+
+## Graph functions
+The schema manager supports the following graph functions:
+
+###  public function createGraph(string $name, array $config = [], $waitForSync = false)
+```
+$arangoClient->schema()->createGraph(
+    'relations',
+    [
+        'edgeDefinitions' => [
+            [
+                'collection' => 'children',
+                'from' => ['characters'],
+                'to' => ['characters']
+            ]
+        ],
+        'orphanCollections' => [
+            'orphanVertices'
+        ],
+    ],
+    true
+);
+```
+
+###  getGraph(string $name): array
+```
+$arangoClient->schema()->getGraphs('relations');
+```
+
+###  getGraphs(): array
+```
+$arangoClient->schema()->getGraphs();
+```
+
+###  hasGraph(string $name): bool
+```
+$arangoClient->schema()->hasGraph('relations');
+```
+
+###  deleteGraph(string $name): bool
+```
+$arangoClient->schema()->deleteGraph('locations');
+```
+
+###  getGraphVertices(string $name): array
+```
+$arangoClient->schema()->getGraphVertices('relations');
+```
+
+###  addGraphVertex(string $name, string $vertex): array
+```
+$arangoClient->schema()->addGraphVertex('relations', 'houses');
+```
+
+###  removeGraphVertex(string $name, string $vertex, bool $dropCollection = false): array
+```
+$arangoClient->schema()->removeGraphVertex('relations', 'houses', true);
+```
+
+###  getGraphEdges(string $name): array
+```
+$arangoClient->schema()->deleteGraph('locations');
+```
+
+###  addGraphEdge(string $name, array $edgeDefinition): array
+```
+$arangoClient->schema()->addGraphEdge(
+    'relations', 
+     [
+        'collection' => 'vassals',
+        'from' => ['characters'],
+        'to' => ['houses']
+    ]
+);
+```
+
+###  replaceGraphEdge(string $name, string $edge, array $edgeDefinition, bool $dropCollection = false, bool $waitForSync = false): array 
+```
+$arangoClient->schema()->createGraph(
+    'relations',
+    [
+        'edgeDefinitions' => [
+            [
+                'collection' => 'children',
+                'from' => ['characters'],
+                'to' => ['characters']
+            ]
+        ]
+    ]
+);
+```
+
+###  removeGraphEdge(string $name, string $edge, bool $dropCollection = true, bool $waitForSync = false): array
+```
+$arangoClient->schema()->removeGraphEdge(
+    'relations',
+    'children',
+    true,
+    true
+);
+```
+

docs/schema-views.md

@@ -1,5 +1,5 @@
 # Schema manager - Views
-You can use the schema manager to perform CRUD actions on indexes within a collection.
+You can use the schema manager to perform CRUD actions on ArangoSearch views.
 
 ## View functions
 The schema manager supports the following index functions:

src/ArangoClient.php

@@ -43,9 +43,7 @@ public function __construct(array $config = [], GuzzleClient $httpClient = null)
         $config['endpoint'] = $this->generateEndpoint($config);
         $this->config = new HttpClientConfig($config);
 
-        $this->httpClient = isset($httpClient)
-            ? $httpClient
-            : new GuzzleClient($this->config->mapGuzzleHttpClientConfig());
+        $this->httpClient = $httpClient ?? new GuzzleClient($this->config->mapGuzzleHttpClientConfig());
     }
 
     /**
@@ -156,10 +154,10 @@ protected function handleGuzzleException(Throwable $e): void
         }
 
         throw(
-        new ArangoException(
-            $message,
-            (int) $code
-        )
+            new ArangoException(
+                $code . ' - ' .  $message,
+                (int) $code
+            )
         );
     }
 

src/Exceptions/ArangoException.php

@@ -4,5 +4,4 @@
 
 class ArangoException extends \Exception
 {
-
 }

src/Schema/ManagesCollections.php

@@ -7,7 +7,7 @@
 use ArangoClient\ArangoClient;
 use ArangoClient\Exceptions\ArangoException;
 
-/*
+/**
  * @see https://www.arangodb.com/docs/stable/http/collection.html
  */
 trait ManagesCollections