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 * @copyright 2010 onwards, Blindside Networks Inc
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 * @copyright 2010 onwards, Blindside Networks Inc
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 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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 * @author    Jesus Federico  (jesus [at] blindsidenetworks [dt] com)
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 * @author    Jesus Federico  (jesus [at] blindsidenetworks [dt] com)
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 */
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 */
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class broker {
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class broker {
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    /** @var array List of required params */
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    protected $requiredparams = [
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        'recording_ready' => [
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            'bigbluebuttonbn' => 'The BigBlueButtonBN instance ID must be specified.',
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            'signed_parameters' => 'A JWT encoded string must be included as [signed_parameters].'
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        ],
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        'meeting_events' => [
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            'bigbluebuttonbn' => 'The BigBlueButtonBN instance ID must be specified.'
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        ],
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    ];
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    /**
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    /**
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     * Validate the supplied list of parameters, providing feedback about any missing or incorrect values.
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     * Validate the supplied list of parameters, providing feedback about any missing or incorrect values.
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     *
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     *
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     * @param array $params
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     * @param array $params
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     * @return null|string
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     * @return null|string
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     */
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     */
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    public function validate_parameters(array $params): ?string {
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    public static function validate_parameters(array $params): ?string {
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        $requiredparams = [
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            'recording_ready' => [
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                'bigbluebuttonbn' => 'The BigBlueButtonBN instance ID must be specified.',
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                'signed_parameters' => 'A JWT encoded string must be included as [signed_parameters].',
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            ],
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            'meeting_events' => [
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                'bigbluebuttonbn' => 'The BigBlueButtonBN instance ID must be specified.',
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            ],
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        ];
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        if (!isset($params['action']) || empty($params['action']) ) {
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        if (!isset($params['action']) || empty($params['action'])) {
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            return 'Parameter ['.$params['action'].'] was not included';
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            return 'Parameter [' . $params['action'] . '] was not included';
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        }
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        }
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        $action = strtolower($params['action']);
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        $action = strtolower($params['action']);
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        if (!array_key_exists($action, $this->requiredparams)) {
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        if (!array_key_exists($action, $requiredparams)) {
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            return "Action {$params['action']} can not be performed.";
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            return "Action {$params['action']} can not be performed.";
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        }
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        }
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        return $this->validate_parameters_message($params, $this->requiredparams[$action]);
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        return self::validate_parameters_message($params, $requiredparams[$action]);
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    }
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    }
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    /**
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    /**
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            $jsonstr = file_get_contents('php://input');
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            $jsonstr = file_get_contents('php://input');
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            // Convert JSON string to a JSON object.
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            // Convert JSON string to a JSON object.
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            $jsonobj = json_decode($jsonstr);
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            $jsonobj = json_decode($jsonstr);
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            $headermsg = meeting::meeting_events($instance, $jsonobj);
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            $headermsg = meeting::meeting_events($instance, $jsonobj);
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            header($headermsg);
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            self::process_extension_actions($instance, $jsonstr);
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        } catch (Exception $e) {
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        } catch (Exception $e) {
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            $msg = 'Caught exception: ' . $e->getMessage();
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            $msg = 'Caught exception: ' . $e->getMessage();
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            debugging($msg, DEBUG_DEVELOPER);
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            header('HTTP/1.0 400 Bad Request. ' . $msg);
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            $headermsg = 'HTTP/1.0 400 Bad Request. ' . $msg;
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        }
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        }
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        header($headermsg);
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    }
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    /**
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     * Process meeting events extension actions.
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     *
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     * @param instance $instance
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     * @param string $jsonstr
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     * @return void
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     */
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    protected static function process_extension_actions(instance $instance, string $jsonstr) {
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        // Hooks for extensions.
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        $extensions = extension::broker_meeting_events_addons_instances($instance, $jsonstr);
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        foreach ($extensions as $extension) {
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            $extension->process_action();
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    }
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        }
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    }
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    /**
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    /**