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<?php
/**
 * Created by PhpStorm.
 * User: jwitz
 * Date: 7/16/15
 * Time: 4:15 PM
 */

class WorkflowConfiguration implements JsonSerializable {
    public $filters;
    public $default_filter;

    public function __construct($filters, $default_filter = null)
    {
        $this->filters = $filters;
        $this->default_filter = $default_filter;
    }

    public function toJSON() {
        return json_encode($this);
    }

    public static function parse($json) {
        return json_decode($json);
    }

    public static function fromJson($json) {
        $configJSON = self::parse($json);
        $default_filter = $configJSON->task_routing->default_filter;
        $filters = array();
        foreach($configJSON->task_routing->filters as $filter) {
            // friendly_name and filter_friendly_name should map to same variable
            $friendly_name = isset($filter->filter_friendly_name) ? $filter->filter_friendly_name : $filter->friendly_name;
            $filter = new WorkflowRule($filter->expression, $filter->targets, $friendly_name);
            $filters[] = $filter;
        }
        return new WorkflowConfiguration($filters, $default_filter);
    }

    public function jsonSerialize() {
        $json = array();
        $task_routing = array();
        $task_routing["filters"] = $this->filters;
        $task_routing["default_filter"] = $this->default_filter;
        $json["task_routing"] = $task_routing;
        return $json;
    }
}

class WorkflowRule implements JsonSerializable {
    public $expression;
    public $friendly_name;
    public $targets;

    public function __construct($expression, $targets, $friendly_name = null)
    {
        $this->expression = $expression;
        $this->targets = $targets;
        $this->friendly_name = $friendly_name;
    }

    public function jsonSerialize() {
        $json = array();
        $json["expression"] = $this->expression;
        $json["targets"] = $this->targets;
        if($this->friendly_name != null) {
            $json["friendly_name"] = $this->friendly_name;
        }
        return $json;
    }
}

class WorkflowRuleTarget implements JsonSerializable {
    public $queue;
    public $expression;
    public $priority;
    public $timeout;

    public function __construct($queue, $priority = null, $timeout = null, $expression = null)
    {
        $this->queue = $queue;
        $this->priority = $priority;
        $this->timeout = $timeout;
        $this->expression = $expression;
    }

    public function jsonSerialize() {
        $json = array();
        $json["queue"] = $this->queue;
        if($this->priority != null) {
            $json["priority"] = $this->priority;
        }
        if($this->timeout != null) {
            $json["timeout"] = $this->timeout;
        }
        if($this->expression != null) {
            $json["expression"] = $this->expression;
        }
        return $json;
    }
}