Add support for Redis in addition to System V queues

models/Queue.php

@@ -0,0 +1,39 @@
+<?php
+
+/*
+ * This file is part of RaspiSMS.
+ *
+ * (c) Pierre-Lin Bonnemaison <plebwebsas@gmail.com>
+ *
+ * This source file is subject to the GPL-3.0 license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace models;
+
+/**
+ *
+ */
+interface Queue
+{
+    /**
+     * A FIFO Queue to exchange messages, the backend mechanism can be whatever we want, but the queue take message, tag for routing is optionnal
+     * @param string $id : A unique identifier for the queue
+     */
+    public function __construct($id);
+
+    /**
+     * Add a message to the queue
+     * 
+     * @param string $message : The message to add to the queue, must be a string, for complex data just use json
+     * @param ?string $tag : A tag to associate to the message for routing purposes, if not set will add to general queue
+     */
+    public function push($message, ?string $tag = null);
+
+    /**
+     * Read the older message in the queue (non-blocking)
+     * @param ?string $tag : A tag to associate to the message for routing purposes, if not set will read from general queue
+     * @return ?string $message : The oldest message or null if no message found, can be anything
+     */
+    public function read(?string $tag = null);
+}