<?php
namespace ProcessMaker\BusinessModel\Group;

class User
{
    private $arrayFieldDefinition = array(
        "GRP_UID" => array("type" => "string", "required" => false, "empty" => false, "defaultValues" => array(), "fieldNameAux" => "groupUid"),
        "USR_UID" => array("type" => "string", "required" => true,  "empty" => false, "defaultValues" => array(), "fieldNameAux" => "userUid")
    );

    private $formatFieldNameInUppercase = true;

    private $arrayFieldNameForException = array();

    /**
     * Constructor of the class
     *
     * return void
     */
    public function __construct()
    {
        try {
            foreach ($this->arrayFieldDefinition as $key => $value) {
                $this->arrayFieldNameForException[$value["fieldNameAux"]] = $key;
            }
        } catch (\Exception $e) {
            throw $e;
        }
    }

    /**
     * Set the format of the fields name (uppercase, lowercase)
     *
     * @param bool $flag Value that set the format
     *
     * return void
     */
    public function setFormatFieldNameInUppercase($flag)
    {
        try {
            $this->formatFieldNameInUppercase = $flag;

            $this->setArrayFieldNameForException($this->arrayFieldNameForException);
        } catch (\Exception $e) {
            throw $e;
        }
    }

    /**
     * Set exception messages for fields
     *
     * @param array $arrayData Data with the fields
     *
     * return void
     */
    public function setArrayFieldNameForException($arrayData)
    {
        try {
            foreach ($arrayData as $key => $value) {
                $this->arrayFieldNameForException[$key] = $this->getFieldNameByFormatFieldName($value);
            }
        } catch (\Exception $e) {
            throw $e;
        }
    }

    /**
     * Get the name of the field according to the format
     *
     * @param string $fieldName Field name
     *
     * return string Return the field name according the format
     */
    public function getFieldNameByFormatFieldName($fieldName)
    {
        try {
            return ($this->formatFieldNameInUppercase)? strtoupper($fieldName) : strtolower($fieldName);
        } catch (\Exception $e) {
            throw $e;
        }
    }

    /**
     * Verify if doesn't exist the User in Group
     *
     * @param string $groupUid              Unique id of Group
     * @param string $userUid               Unique id of User
     * @param string $fieldNameForException Field name for the exception
     *
     * return void Throw exception if doesn't exist the User in Group
     */
    public function throwExceptionIfNotExistsGroupUser($groupUid, $userUid, $fieldNameForException)
    {
        try {
            $obj = \GroupUserPeer::retrieveByPK($groupUid, $userUid);

            if (!(is_object($obj) && get_class($obj) == "GroupUser")) {
                throw new \Exception(\G::LoadTranslation("ID_GROUP_USER_IS_NOT_ASSIGNED", array($fieldNameForException, $userUid)));
            }
        } catch (\Exception $e) {
            throw $e;
        }
    }

    /**
     * Verify if exists the User in Group
     *
     * @param string $groupUid              Unique id of Group
     * @param string $userUid               Unique id of User
     * @param string $fieldNameForException Field name for the exception
     *
     * return void Throw exception if exists the User in Group
     */
    public function throwExceptionIfExistsGroupUser($groupUid, $userUid, $fieldNameForException)
    {
        try {
            $obj = \GroupUserPeer::retrieveByPK($groupUid, $userUid);

            if (is_object($obj) && get_class($obj) == "GroupUser") {
                throw new \Exception(\G::LoadTranslation("ID_GROUP_USER_IS_ALREADY_ASSIGNED", array($fieldNameForException, $userUid)));
            }
        } catch (\Exception $e) {
            throw $e;
        }
    }

    /**
     * Assign User to Group
     *
     * @param string $groupUid  Unique id of Group
     * @param array  $arrayData Data
     *
     * return array Return data of the User assigned to Group
     */
    public function create($groupUid, $arrayData)
    {
        try {
            $arrayData = array_change_key_case($arrayData, CASE_UPPER);

            unset($arrayData["GRP_UID"]);

            //Verify data
            $process = new \ProcessMaker\BusinessModel\Process();
            $group = new \ProcessMaker\BusinessModel\Group();

            $group->throwExceptionIfNotExistsGroup($groupUid, $this->arrayFieldNameForException["groupUid"]);

            $process->throwExceptionIfDataNotMetFieldDefinition($arrayData, $this->arrayFieldDefinition, $this->arrayFieldNameForException, true);

            $process->throwExceptionIfNotExistsUser($arrayData["USR_UID"], $this->arrayFieldNameForException["userUid"]);

            $this->throwExceptionIfExistsGroupUser($groupUid, $arrayData["USR_UID"], $this->arrayFieldNameForException["userUid"]);

            //Create
            $group = new \Groups();

            $group->addUserToGroup($groupUid, $arrayData["USR_UID"]);

            //Return
            $arrayData = array_merge(array("GRP_UID" => $groupUid), $arrayData);

            if (!$this->formatFieldNameInUppercase) {
                $arrayData = array_change_key_case($arrayData, CASE_LOWER);
            }

            return $arrayData;
        } catch (\Exception $e) {
            throw $e;
        }
    }

    /**
     * Unassign User of the Group
     *
     * @param string $groupUid Unique id of Group
     * @param string $userUid  Unique id of User
     *
     * return void
     */
    public function delete($groupUid, $userUid)
    {
        try {
            //Verify data
            $process = new \ProcessMaker\BusinessModel\Process();
            $group = new \ProcessMaker\BusinessModel\Group();

            $group->throwExceptionIfNotExistsGroup($groupUid, $this->arrayFieldNameForException["groupUid"]);

            $process->throwExceptionIfNotExistsUser($userUid, $this->arrayFieldNameForException["userUid"]);

            $this->throwExceptionIfNotExistsGroupUser($groupUid, $userUid, $this->arrayFieldNameForException["userUid"]);

            //Delete
            $group = new \Groups();

            $group->removeUserOfGroup($groupUid, $userUid);
        } catch (\Exception $e) {
            throw $e;
        }
    }
}