php_action_selector_for_restful_api

    public function select_action() {

        /**
         * uri_units[1] => api
         * uri_units[2] => auth / stores
         * uri_units[3] => store_id / tag
         * uri_units[4] => components / tag_name
         * uri_units[5] => component_id
         */

            switch ($this->uri_units[2]) {
                case "auth":
                    // Authorize user
                    $this->action = "Authorization";
                    break;
                case "stores":
                    switch ($this->method) {
                        case "GET":
                            if (isset($this->uri_units[3])) {
                                switch ($this->uri_units[3]) {
                                    case "tag":
                                        // Return all shops with provided tag_name
                                        $this->action = "Return shops with provided tag";
                                        break;
                                    default:
                                        if (isset($this->uri_units[4])) {
                                            if (isset($this->uri_units[5])) {
                                                // Return component with provided id from provided shop id
                                                $this->action = "Return component with provided id from provided shop id";
                                            } else {
                                                // Return all components from provided shop id
                                                $this->action = "Return all components from provided shop id";
                                            }
                                        } else {
                                            // Return shop with provided shop id
                                            $this->action = "Return shop with provided shop id";
                                        }
                                }
                            } else {
                                // Return all shops
                                $this->action = "Return all shops";
                            }
                            break;
                        case "POST":
                            if (isset($this->uri_units[3])) {
                                if (isset($this->uri_units[4])) {
                                    // Add component
                                    $this->action = "Add component";
                                } else {
                                    // Edit shop
                                    $this->action = "Edit shop";
                                }
                            } else {
                                // Add new shop
                                $this->action = "Add new shop";
                            }
                            break;
                        case "DELETE":
                            if (isset($this->uri_units[4])) {
                                // Delete component
                                $this->action = "Delete component";
                            } else {
                                $this->action = "Delete shop";
                            }
                    }
            }
        }