first commit

class/class.TemplateAccess.php

@@ -0,0 +1,71 @@
+<?php
+
+class TemplateAccess implements ArrayAccess, JsonSerializable
+{
+    /**
+     * Implements ArrayAccess interface.
+     */
+    private $cached_offsets = [];
+
+    public function offsetSet($offset, $value): void
+    {
+        $this->{$offset} = $this->cached_offsets[$offset] = $value;
+    }
+
+    public function offsetExists($offset): bool
+    {
+        return isset($this->{$offset}) || method_exists($this, $this->offsetMethod($offset));
+    }
+
+    public function offsetUnset($offset): void
+    {
+        unset($this->{$offset});
+    }
+
+    public function offsetMethod($offset)
+    {
+        return 'fetch'.ucfirst($offset);
+    }
+
+    public function offsetGet($offset): mixed
+    {
+        if (array_key_exists($offset, $this->cached_offsets)) {
+            return $this->cached_offsets[$offset];
+        }
+
+        $method = $this->offsetMethod($offset);
+        if (method_exists($this, $method)) {
+            $res = call_user_func([$this, $method]);
+            $this->cached_offsets[$offset] = $res;
+
+            return $res;
+        }
+
+        if (isset($this->{$offset})) {
+            return $this->{$offset};
+        }
+
+        return null;
+    }
+
+    public function injectCache($offset, $value)
+    {
+        return $this->cached_offsets[$offset] = $value;
+    }
+
+    public function jsonSerialize(): mixed
+    {
+        $data = get_object_vars($this);
+        $data['_cache'] = $data['cached_offsets'];
+        unset($data['cached_offsets']);
+
+        $methods = array_filter(get_class_methods($this), function ($x) {
+            return substr($x, 0, 5) == 'fetch';
+        });
+        $methods = array_values(array_map(function ($x) {
+            return lcfirst(substr($x, 5));
+        }, $methods));
+
+        return $data + ['_attributes' => $methods];
+    }
+}