MAPG-43 initial classes for DB handling

src/Database/Mysql/ResultSet.php

@@ -0,0 +1,62 @@
+<?php namespace MapGuesser\Database\Mysql;
+
+use MapGuesser\Interfaces\Database\IResultSet;
+use mysqli_result;
+
+class ResultSet implements IResultSet
+{
+    private mysqli_result $result;
+
+    public function __construct(mysqli_result $result)
+    {
+        $this->result = $result;
+    }
+
+    public function fetch(int $type = IResultSet::FETCH_ASSOC)
+    {
+        return $this->result->fetch_array($this->convertFetchType($type));
+    }
+
+    public function fetchAll(int $type = IResultSet::FETCH_ASSOC)
+    {
+        return $this->result->fetch_all($this->convertFetchType($type));
+    }
+
+    public function fetchOneColumn(string $valueName, string $keyName = null)
+    {
+        $array = [];
+
+        while ($r = $this->fetch(IResultSet::FETCH_ASSOC)) {
+            if (isset($keyName)) {
+                $array[$r[$keyName]] = $r[$valueName];
+            } else {
+                $array[] = $r[$valueName];
+            }
+        }
+
+        return $array;
+    }
+
+    private function convertFetchType(int $type): int
+    {
+        switch ($type) {
+            case IResultSet::FETCH_ASSOC:
+                $internal_type = MYSQLI_ASSOC;
+                break;
+
+            case IResultSet::FETCH_BOTH:
+                $internal_type = MYSQLI_BOTH;
+                break;
+
+            case IResultSet::FETCH_NUM:
+                $internal_type = MYSQLI_NUM;
+                break;
+
+            default:
+                $internal_type = MYSQLI_BOTH;
+                break;
+        }
+
+        return $internal_type;
+    }
+}