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fabric.go
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fabric.go
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/*
* The MIT License (MIT)
*
* MQTT Infrastructure
* Copyright (c) 2016 Michael Jacobsen (github.com/mikejac)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*/
package mqttfabric
import (
"log"
"encoding/json"
)
const (
FABRIC_TOPIC_ANY = "+"
NODENAME_BROADCAST = "broadcast"
FABRIC_SYS = "sysctl"
FABRIC_CMD_STATUS = "status"
/******************************************************************************************************************
* common platform id's
*
*/
PLATFORM_ID_CHRONOS = "chronos"
/******************************************************************************************************************
* common service id's
*
*/
SERVICE_ID_DIGITAL = "digital"
SERVICE_ID_DIGITAL_IN = "digital_in"
SERVICE_ID_DIGITAL_OUT = "digital_out"
SERVICE_ID_ANALOG = "analog"
SERVICE_ID_ANALOG_IN = "analog_in"
SERVICE_ID_ANALOG_OUT = "analog_out"
SERVICE_ID_TIME = "time"
SERVICE_ID_TEXT = "text"
/******************************************************************************************************************
* common task id's
*
*/
TASK_ID_DIGITAL_WRITE_MOMENTARY = "digital_write_momentary"
TASK_ID_DIGITAL_WRITE_MOMENTARY_EX = "digital_write_momentary_ex"
TASK_ID_DIGITAL_WRITE = "digital_write"
TASK_ID_DIGITAL_WRITE_EX = "digital_write_ex"
TASK_ID_ANALOG_WRITE = "analog_write"
TASK_ID_ANALOG_WRITE_EX = "analog_write_ex"
TASK_ID_RAW = "raw"
/******************************************************************************************************************
* common feed id's
*
*/
FEED_ID_SECONDS = "seconds"
)
type ClassType int
const (
DEVICE ClassType = 1
CONTROLLER ClassType = 2
)
// Fabric ...
//
type Fabric struct {
RootTopic string
NodeName string
PlatformID string
ActorID string
ActorPlatformID string
TaskID string
ClassType ClassType
}
type Status int
const (
FABRIC_ONLINE Status = 1
FABRIC_OFFLINE Status = 2
FABRIC_DISCONNECTED Status = 3
)
// FabricInitialize ...
//
func FabricInitialize(rootTopic string, nodename string, platformID string, classType ClassType) (*Fabric) {
f := &Fabric{}
f.ClassType = classType
f.RootTopic = rootTopic
f.NodeName = nodename
f.PlatformID = platformID
f.ActorID = nodename
f.ActorPlatformID = platformID
f.TaskID = "task_id"
return f
}
// StatusMessage ...
//
func (f *Fabric) StatusMessage(fabricStatus Status, seconds int64) (string, string) {
var topic = f.RootTopic + "/" + f.NodeName + "/$commands/$clients/" + FABRIC_SYS + "/" + f.PlatformID + "/" + FABRIC_CMD_STATUS
type Data struct {
Type string `json:"_type"`
Status string `json:"status"`
Uptime *int64 `json:"uptime"`
Nodename string `json:"nodename"`
PlatformID string `json:"platform_id"`
Class string `json:"class"`
}
type D struct {
Data Data `json:"d"`
}
jsonMsg := D{
Data: Data{
Type: "status",
Nodename: f.NodeName,
PlatformID: f.PlatformID,
},
}
switch f.ClassType {
case DEVICE:
jsonMsg.Data.Class = "device"
case CONTROLLER:
jsonMsg.Data.Class = "controller"
default:
return "", ""
}
switch fabricStatus {
case FABRIC_ONLINE:
jsonMsg.Data.Status = "online"
jsonMsg.Data.Uptime = &seconds
case FABRIC_OFFLINE:
jsonMsg.Data.Status = "offline"
jsonMsg.Data.Uptime = &seconds
case FABRIC_DISCONNECTED:
jsonMsg.Data.Status = "disconnected"
jsonMsg.Data.Uptime = nil
default:
return "", ""
}
msg, err := json.Marshal(jsonMsg)
if err != nil {
log.Println("StatusMessage(): err = ", err)
return "", ""
}
return topic, string(msg)
}
// DeviceOnrampTopic ...
//
func (f *Fabric) DeviceOnrampTopic(serviceID string, feedID string) (string) {
return f.RootTopic + "/" + f.NodeName + "/$feeds/$onramp/" + f.PlatformID + "/" + serviceID + "/" + feedID
}
// DeviceOfframpSubscription ...
//
func (f *Fabric) DeviceOfframpSubscription(nodename string, actorID string, actorPlatformID string, taskID string, platformID string, serviceID string, feedID string) (string) {
return f.RootTopic + "/" + nodename + "/$feeds/$offramp/" + actorID + "/" + actorPlatformID + "/" + taskID + "/" + platformID + "/" + serviceID + "/" + feedID
}
// CtrlOfframpTopic ...
//
func (f *Fabric) CtrlOfframpTopic(nodename string, taskID string, platformID string, serviceID string, feedID string) (string) {
return f.RootTopic + "/" + nodename + "/$feeds/$offramp/" + f.ActorID + "/" + f.ActorPlatformID + "/" + taskID + "/" + platformID + "/" + serviceID + "/" + feedID
}
// CtrlOnrampSubscription ...
//
func (f *Fabric) CtrlOnrampSubscription(nodename string, platformID string, serviceID string, feedID string) (string) {
return f.RootTopic + "/" + nodename + "/$feeds/$onramp/" + platformID + "/" + serviceID + "/" + feedID
}