Flow confirmation with countdown
The purpose of these 2 flows is to provide a confirmation opportunity to stop a flow, where a inject node has been clicked in error, or without thinking of the consequences in the node-RED editor (not dashboard). The 2 flows work in different ways;
The first will halt the flow for 10 seconds, and unless a cancel node is pressed, the flow will continue running. Pressing cancel, halts the flow.
The second, starts a 10 second timer, and if the confirm node is not clicked within 10 seconds, the flow will halt. Clicking confirm will let the flow run.
(The link between the function node & exec node has been removed, you will need to add the link if you want to carry out the actions described)
[{"id":"d9792b68.171d18","type":"inject","z":"4487e413.bb781c","name":"Restart node-RED","topic":"nrRestart","payload":"node-red-restart","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":230,"y":1270,"wires":[["3516bc38.3395f4"]],"icon":"font-awesome/fa-refresh"},{"id":"3516bc38.3395f4","type":"function","z":"4487e413.bb781c","name":"Countdown","func":"let input = msg.payload;\nlet cancel = false;\nlet option = msg.topic;\nlet counter = 10;\nvar desc;\n\n// define the status messages\nif (option == \"nrRestart\"){\n desc = \"Restarting node-RED\";\n } else if (option == \"piRestart\"){\n desc = \"Rebooting system\";\n } else if (option == \"update\"){\n desc = \"Updating Pi server\";\n }\n \n// enable user to cancel operation\nif (option == \"cancel\"){\n flow.set(\"cancel\", true);\n return;\n } else {flow.set(\"cancel\", false);}\n\n// Run the countdown\nvar countdown = setInterval(function(){\n node.status({text:(desc+\" in \"+counter+\" seconds\")});\n counter--;\n if (flow.get(\"cancel\")===true) {\n clearInterval(countdown);\n node.status({text:\"Request Cancelled\"});\n flow.set(\"cancel\", false);\n }\n \n// When counter expires, update status & reset \n if (counter === -1) {\n node.status({text:(desc+\" NOW!\")});\n clearInterval(countdown);\n node.send({\"payload\": input});\n }\n}, 1000);","outputs":1,"noerr":0,"x":450,"y":1330,"wires":[[]],"icon":"font-awesome/fa-hourglass-1"},{"id":"609e311a.8302b","type":"inject","z":"4487e413.bb781c","name":"Cancel","topic":"cancel","payload":"cancel","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":"","x":270,"y":1390,"wires":[["3516bc38.3395f4"]],"icon":"font-awesome/fa-exclamation-triangle"},{"id":"f6ab5b46.514e08","type":"exec","z":"4487e413.bb781c","command":"","addpay":true,"append":"","useSpawn":"false","timer":"","oldrc":false,"name":"Command","x":630,"y":1320,"wires":[[],[],[]]},{"id":"ee6338f0.bdcfd8","type":"inject","z":"4487e413.bb781c","name":"Restart Pi","topic":"piRestart","payload":"sudo systemctl reboot","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":260,"y":1310,"wires":[["3516bc38.3395f4"]],"icon":"font-awesome/fa-refresh"},{"id":"d5bb979b.123548","type":"inject","z":"4487e413.bb781c","name":"Update Pi","topic":"update","payload":"sudo ~/update_server.sh","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":260,"y":1350,"wires":[["3516bc38.3395f4"]],"icon":"node-red/db.svg"},{"id":"b988f007.c6dd6","type":"inject","z":"4487e413.bb781c","name":"Restart node-RED","topic":"nrRestart","payload":"node-red-restart","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":240,"y":1450,"wires":[["418bf636.a88bd8"]],"icon":"font-awesome/fa-refresh"},{"id":"f48ec4b0.caab38","type":"inject","z":"4487e413.bb781c","name":"Confirm","topic":"confirm","payload":"confirm","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":"","x":280,"y":1570,"wires":[["418bf636.a88bd8"]],"icon":"font-awesome/fa-exclamation-triangle"},{"id":"97991ced.05158","type":"exec","z":"4487e413.bb781c","command":"","addpay":true,"append":"","useSpawn":"false","timer":"","oldrc":false,"name":"Command","x":630,"y":1500,"wires":[[],[],[]]},{"id":"3ad3fcb4.4d5684","type":"inject","z":"4487e413.bb781c","name":"Restart Pi","topic":"piRestart","payload":"sudo systemctl reboot","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":270,"y":1490,"wires":[["418bf636.a88bd8"]],"icon":"font-awesome/fa-refresh"},{"id":"88a2f64c.47de78","type":"inject","z":"4487e413.bb781c","name":"Update Pi","topic":"update","payload":"sudo ~/update_server.sh","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":270,"y":1530,"wires":[["418bf636.a88bd8"]],"icon":"node-red/db.svg"},{"id":"418bf636.a88bd8","type":"function","z":"4487e413.bb781c","name":"Countdown","func":"let input = msg.payload;\nlet option = msg.topic;\nlet confirm = false;\nlet counter = 10;\nvar desc;\n\n// define the status messages\n if (option == \"nrRestart\"){\n desc = \"Confirm NR restart\";\n } else if (option == \"piRestart\"){\n desc = \"Confirm reboot\";\n } else if (option == \"update\"){\n desc = \"Confirm update\";\n }\n \n// enable user to confirm operation\nif (option == \"confirm\"){\n flow.set(\"confirm\", true);\n return;\n } else {flow.set(\"confirm\", false);}\n \n// Run the countdown\nvar countdown = setInterval(function(){\n node.status({text:(desc+\" within \"+counter+\" seconds\")});\n counter--;\n if (flow.get(\"confirm\")===true) {\n clearInterval(countdown);\n node.status({text:\"Request Confirmed\"});\n node.send({\"payload\": input});\n flow.set(\"confirm\", false);\n }\n \n// When counter expires, update status & reset\n if (counter === 0) {\n node.status({text:(\"Request Cancelled!\")});\n clearInterval(countdown);\n }\n}, 1000);","outputs":1,"noerr":0,"x":460,"y":1510,"wires":[[]]},{"id":"24a0ce1e.4a4c42","type":"comment","z":"4487e413.bb781c","name":"Unless cancelled, command will be actioned","info":"","x":550,"y":1270,"wires":[]},{"id":"48618e90.16136","type":"comment","z":"4487e413.bb781c","name":"Unless confirmed, command will be cancelled","info":"","x":550,"y":1450,"wires":[]}]
