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// SPDX-License-Identifier: Zlib
// SPDX-FileCopyrightText: 2024 CERN (home.cern)
// SPDX-FileContributor: Author: Sylvain Fargier <sylvain.fargier@cern.ch>
import bodyParser from "body-parser";
import AxisPTZ from "./AxisPTZ.js";
/**
* @typedef {import('./PTZDevice')} PTZDevice
* @typedef {import('express').Request} Request
* @typedef {import('express').Response} Response
*
* @typedef {import('express').IRouter} expressIRouter
* @typedef {import('express-ws').WithWebsocketMethod & expressIRouter} IRouter
*/
const registry = {
axis: AxisPTZ
};
const JsonParser = bodyParser.json({ strict: false });
class PTZService {
/**
* @param {CamExpress.InternalGroupConfig} groups
* @param {CamExpress.Credentials} credentials
*/
constructor(groups, credentials) {
this.groups = groups;
this.creds = credentials;
/** @type {{ [id: string]: PTZDevice }} */
this._ptz = {};
}
/**
* @param {IRouter} router
*/
register(router) {
/**
* @swagger
* /cameras/{group}/{camera}/ptz/limits:
* get:
* tags: ['ptz']
* summary: get PTZ limits configuration
* description: |
* Exposes to PTZ limits to clients
* parameters:
* - in: path
* name: group
* schema:
* type: string
* description: name of the group defined in the config
* required: true
* - in: path
* name: camera
* schema:
* type: string
* description: name of the camera defined in the config
* required: true
* produces:
* - application/json
* responses:
* 200:
* description: PTZ limits configuration
* 500:
* description: error message
*/
router.get("/cameras/:group/:camera/ptz/limits",
this._call.bind(this, (ptz) => ptz.getLimits()));
/**
* @swagger
* /cameras/{group}/{camera}/ptz:
* get:
* tags: ['ptz']
* summary: get PTZ current position
* description: |
* Exposes to clients PTZ position
* parameters:
* - in: path
* name: group
* schema:
* type: string
* description: name of the group defined in the config
* required: true
* - in: path
* name: camera
* schema:
* type: string
* description: name of the camera defined in the config
* required: true
* produces:
* - application/json
* responses:
* 200:
* description: PTZ limits position
* 500:
* description: error message
*/
router.get("/cameras/:group/:camera/ptz",
this._call.bind(this, (ptz) => ptz.getPosition()));
/**
* @swagger
* /cameras/{group}/{camera}/ptz:
* put:
* tags: ['ptz']
* summary: execute an absolute PTZ motion
* description: |
* Sends an absolute motion command to PTZ
* parameters:
* - in: path
* name: group
* schema:
* type: string
* description: name of the group defined in the config
* required: true
* - in: path
* name: camera
* schema:
* type: string
* description: name of the camera defined in the config
* required: true
* - in: body
* name: motion parameters
* description: 'PTZ absolute motion values'
* required: true
* example:
* pan: 0
* tilt: 0
* zoom: 200
* iris: 6248
* focus: 9854
* brightness: 4999
* autofocus: true
* autoiris: true
* produces:
* - application/json
* responses:
* 200:
* description: PTZ absolute movement ongoing
* 500:
* description: error message
*/
router.put("/cameras/:group/:camera/ptz", JsonParser,
this._call.bind(this, (ptz, req) => ptz.putPosition(req.body)));
/**
* @swagger
* /cameras/{group}/{camera}/ptz:
* post:
* tags: ['ptz']
* summary: execute an relative PTZ motion
* description: |
* Sends a relative motion command to PTZ
* parameters:
* - in: path
* name: group
* schema:
* type: string
* description: name of the group defined in the config
* required: true
* - in: path
* name: camera
* schema:
* type: string
* description: name of the camera defined in the config
* required: true
* - in: body
* name: motion parameters
* description: 'PTZ relative motion values'
* required: true
* example:
* pan: -10
* tilt: -10
* zoom: -20
* iris: -10
* focus: -100
* brightness: -10
* produces:
* - application/json
* responses:
* 200:
* description: PTZ relative movement ongoing
* 500:
* description: error message
*/
router.post("/cameras/:group/:camera/ptz", JsonParser,
this._call.bind(this, (ptz, req) => ptz.postPosition(req.body)));
}
/**
* @param {Request} req
* @param {Response} res
* @param {(ptz: PTZDevice, req: Request, res: Response) => Promise<any>} cb
* @returns
*/
async _call(cb, req, res) {
const ptz = this.getPTZ(this.getCamera(req));
if (ptz) {
try {
return res.json(await cb(ptz, req, res));
}
catch (err) {
return res.status(500).send(err?.message ?? "internal error");
}
}
else {
return res.status(404).send("PTZ Camera not found");
}
}
/**
* @param {Request} req
* @return {CamExpress.CameraConfig&{id:string|number}|undefined}
*/
getCamera(req) {
const group = req?.params?.group;
const camera = req?.params?.camera;
return this.groups?.[group]?.cameras?.[camera];
}
/**
* @param {CamExpress.CameraConfig&{id:string|number}|undefined} cam
* @return {PTZDevice|null}
*/
getPTZ(cam) {
if (!cam) { return null; }
let ptz = this._ptz[cam.id];
if (!ptz && cam.ptz) {
const Ctrl = registry[(cam.ptz?.type ?? "").toLowerCase()];
if (Ctrl) {
ptz = new Ctrl({ src: cam.ptz.url,
auth: this.creds?.[cam.name] });
this._ptz[cam.id] = ptz;
}
}
return ptz;
}
release() {
this._ptz = {};
}
}
export default PTZService;
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