Feature/init

src/GetStrategy.php

+<?php
+
+namespace WPDesk\ShowDecision;
+
+/**
+ * Show when some conditions with $_GET are meet.
+ */
+class GetStrategy implements ShouldShowStrategy {
+	/**
+	 * @var array
+	 */
+	private $conditions;
+
+	/**
+	 * @param array $conditions Whether to show on the page or not. Array of arrays with condition for _GET.
+	 *
+	 * Inner arrays mean AND, outer arrays mean OR conditions.
+	 *
+	 * ie. [ [ .. and .. and ..] or [ .. and .. and ..] or .. ]
+	 *
+	 */
+	public function __construct( array $conditions ) {
+		$this->conditions = $conditions;
+	}
+
+	/**
+	 * @return bool
+	 */
+	public function shouldDisplay() {
+		foreach ( $this->conditions as $or_conditions ) {
+			$display = true;
+			foreach ( $or_conditions as $parameter => $value ) {
+				if ( ! isset( $_GET[ $parameter ] ) || $_GET[ $parameter ] !== $value ) {
+					$display = false;
+				}
+			}
+			if ( $display ) {
+				return $display;
+			}
+		}
+
+		return false;
+	}
+}