Workflow: develop a modular n8n workflow that supports Telegram Executecommand Process Webhook
Integrations: executeCommand, function, httpRequest, if, merge, readBinaryFile, set, spreadsheetFile, switch, telegram, telegramTrigger, writeBinaryFile

{"nodes": [{"name": "Switch", "type": "n8n-nodes-base.switch", "notes": "check bot commands", "position": [460, 480], "parameters": {"rules": {"rules": [{"value2": "/start"}, {"output": 1, "value2": "/getweather"}]}, "value1": "={{$json[\"message\"][\"text\"]}}", "dataType": "string", "fallbackOutput": 3}, "notesInFlow": true, "typeVersion": 1}, {"name": "msg_greet", "type": "n8n-nodes-base.telegram", "position": [1820, 300], "parameters": {"text": "=Nice to meet you, {{$node[\"Telegram Trigger\"].json[\"message\"][\"from\"][\"first_name\"]}}.\nI am n8n-powered bot, I can send you a weather data for several European capitals. The data is an image generated in ggplot2 package of R programming language.\nType /getweather to begin.", "chatId": "={{$node[\"Telegram Trigger\"].json[\"message\"][\"chat\"][\"id\"]}}", "additionalFields": {}}, "credentials": {"telegramApi": {"id": "17", "name": "n8n R test bot"}}, "notesInFlow": true, "typeVersion": 1}, {"name": "msg_wrongcommand", "type": "n8n-nodes-base.telegram", "position": [1820, 1160], "parameters": {"text": "=Sorry, {{$node[\"Telegram Trigger\"].json[\"message\"][\"from\"][\"first_name\"]}}, your command was not recognized.\n/getweather - show image with the weather info.", "chatId": "={{$node[\"Telegram Trigger\"].json[\"message\"][\"chat\"][\"id\"]}}", "additionalFields": {}}, "credentials": {"telegramApi": {"id": "17", "name": "n8n R test bot"}}, "notesInFlow": true, "typeVersion": 1}, {"name": "Telegram Trigger", "type": "n8n-nodes-base.telegramTrigger", "position": [300, 480], "webhookId": "2512ec1e-bcff-4dfb-9ef3-208aaecc5634", "parameters": {"updates": ["message"], "additionalFields": {}}, "credentials": {"telegramApi": {"id": "17", "name": "n8n R test bot"}}, "typeVersion": 1}, {"name": "msg_getweather", "type": "n8n-nodes-base.telegram", "position": [2020, 820], "parameters": {"chatId": "={{$node[\"Telegram Trigger\"].json[\"message\"][\"chat\"][\"id\"]}}", "operation": "sendPhoto", "binaryData": true, "additionalFields": {"caption": "=Here's your image, {{$node[\"Telegram Trigger\"].json[\"message\"][\"from\"][\"first_name\"]}}."}}, "credentials": {"telegramApi": {"id": "17", "name": "n8n R test bot"}}, "notesInFlow": true, "typeVersion": 1}, {"name": "City List", "type": "n8n-nodes-base.function", "position": [1040, 640], "parameters": {"functionCode": "return [{Cityid: 2643743, Cityname:\"London\",    Country: \"GB\"},\r\n        {Cityid: 2950159, Cityname:\"Berlin\",    Country: \"DE\"},\r\n        {Cityid: 3117735, Cityname:\"Madrid\",    Country: \"ES\"},\r\n        {Cityid: 3169070, Cityname:\"Rome\",      Country: \"IT\"},\r\n        {Cityid: 683506,  Cityname:\"Bucharest\", Country: \"RO\"},\r\n        {Cityid: 2968815, Cityname:\"Paris\",     Country: \"FR\"},\r\n        {Cityid: 2761369, Cityname:\"Vienna\",    Country: \"AT\"},\r\n        {Cityid: 756135,  Cityname:\"Warsaw\",    Country: \"PL\"},\r\n        {Cityid: 3054638, Cityname:\"Budapest\",  Country: \"HU\"},\r\n        {Cityid: 792680,  Cityname:\"Belgrade\",  Country: \"RS\"}];"}, "typeVersion": 1}, {"name": "Convert API response", "type": "n8n-nodes-base.function", "position": [860, 840], "parameters": {"functionCode": "// this data is stored as a CSV file and then processed in the R script. Please check the R code here:\n// https://gist.github.com/ed-parsadanyan/0561cd12d545e642fcef17dcb0872b00\nvar data = [];\n\nfor (item of items) {\n  data.push({CityName: item.json.name+', '+item.json.sys.country,\n             TempCur : item.json.main.temp,\n             TempMin : item.json.main.temp_min,\n             TempMax : item.json.main.temp_max\n  });\n}\n\nreturn data;"}, "typeVersion": 1}, {"name": "Get weather data", "type": "n8n-nodes-base.httpRequest", "position": [1220, 640], "parameters": {"url": "=https://api.openweathermap.org/data/2.5/weather?id={{$json[\"Cityid\"]}}&units=metric&appid=6d3fff582a101700576faf74734f9535", "options": {}}, "typeVersion": 1, "continueOnFail": true}, {"name": "Spreadsheet File", "type": "n8n-nodes-base.spreadsheetFile", "position": [1040, 840], "parameters": {"options": {"fileName": "={{$node[\"Filename\"].json[\"filename\"]}}.{{$parameter[\"fileFormat\"]}}"}, "operation": "toFile", "fileFormat": "csv"}, "typeVersion": 1}, {"name": "Write csv", "type": "n8n-nodes-base.writeBinaryFile", "position": [1220, 840], "parameters": {"fileName": "={{$node[\"Filename\"].json[\"foldername\"]}}{{$binary.data.fileName}}"}, "typeVersion": 1}, {"name": "Filename", "type": "n8n-nodes-base.set", "position": [860, 640], "parameters": {"values": {"string": [{"name": "filename", "value": "=request_from{{$node[\"Telegram Trigger\"].json[\"message\"][\"from\"][\"id\"]}}_{{DateTime.now().toISO({ format: 'basic' }).split('.')[0]}}"}, {"name": "foldername", "value": "/home/node/.n8n/weather-bot/"}, {"name": "imgname", "value": "=request_from{{$node[\"Telegram Trigger\"].json[\"message\"][\"from\"][\"id\"]}}"}]}, "options": {}}, "typeVersion": 1}, {"name": "msg_errorAPI", "type": "n8n-nodes-base.telegram", "position": [1820, 640], "parameters": {"text": "=Sorry, {{$node[\"Telegram Trigger\"].json[\"message\"][\"from\"][\"first_name\"]}}, an error occurred while fetching weather data. Please try again later.", "chatId": "={{$node[\"Telegram Trigger\"].json[\"message\"][\"chat\"][\"id\"]}}", "additionalFields": {"parse_mode": "Markdown"}}, "credentials": {"telegramApi": {"id": "17", "name": "n8n R test bot"}}, "notesInFlow": true, "typeVersion": 1}, {"name": "Any errors API?", "type": "n8n-nodes-base.if", "position": [1580, 640], "parameters": {"conditions": {"string": [{"value1": "={{$json[\"error\"][\"name\"]}}", "value2": "Error"}]}}, "typeVersion": 1}, {"name": "msg_errorR", "type": "n8n-nodes-base.telegram", "position": [1820, 1000], "parameters": {"text": "=Sorry, {{$node[\"Telegram Trigger\"].json[\"message\"][\"from\"][\"first_name\"]}}, an error occurred while creating an image. Please try again later.", "chatId": "={{$node[\"Telegram Trigger\"].json[\"message\"][\"chat\"][\"id\"]}}", "additionalFields": {"parse_mode": "Markdown"}}, "credentials": {"telegramApi": {"id": "17", "name": "n8n R test bot"}}, "notesInFlow": true, "typeVersion": 1}, {"name": "Read Binary File", "type": "n8n-nodes-base.readBinaryFile", "position": [1820, 820], "parameters": {"filePath": "={{$node[\"Filename\"].json[\"foldername\"]}}{{$node[\"Filename\"].json[\"imgname\"]}}.png"}, "typeVersion": 1}, {"name": "R successful?", "type": "n8n-nodes-base.if", "position": [1580, 840], "parameters": {"conditions": {"number": [{"value1": "={{$json[\"exitCode\"]}}", "operation": "equal"}]}}, "typeVersion": 1}, {"name": "Merge", "type": "n8n-nodes-base.merge", "position": [680, 1160], "parameters": {"mode": "passThrough"}, "typeVersion": 1}, {"name": "Merge1", "type": "n8n-nodes-base.merge", "position": [680, 300], "parameters": {"mode": "passThrough"}, "typeVersion": 1}, {"name": "msg_pleasewait", "type": "n8n-nodes-base.telegram", "position": [1820, 460], "parameters": {"text": "=Please wait while your request is being processed...", "chatId": "={{$node[\"Telegram Trigger\"].json[\"message\"][\"chat\"][\"id\"]}}", "additionalFields": {"parse_mode": "Markdown"}}, "credentials": {"telegramApi": {"id": "17", "name": "n8n R test bot"}}, "notesInFlow": true, "typeVersion": 1}, {"name": "Merge2", "type": "n8n-nodes-base.merge", "position": [680, 640], "parameters": {"mode": "wait"}, "typeVersion": 1}, {"name": "Run R script", "type": "n8n-nodes-base.executeCommand", "position": [1400, 840], "parameters": {"command": "=Rscript --vanilla '{{$node[\"Filename\"].json[\"foldername\"]}}dumbbell_plot.R' '{{$node[\"Filename\"].json[\"foldername\"]}}{{$node[\"Filename\"].json[\"filename\"]}}.csv' '{{$node[\"Filename\"].json[\"foldername\"]}}{{$node[\"Filename\"].json[\"imgname\"]}}.png' >& {{$node[\"Filename\"].json[\"foldername\"]}}{{$node[\"Filename\"].json[\"filename\"]}}.log"}, "typeVersion": 1, "continueOnFail": true}], "connections": {"Merge": {"main": [[{"node": "msg_wrongcommand", "type": "main", "index": 0}]]}, "Merge1": {"main": [[{"node": "msg_greet", "type": "main", "index": 0}]]}, "Merge2": {"main": [[{"node": "Filename", "type": "main", "index": 0}]]}, "Switch": {"main": [[{"node": "Merge1", "type": "main", "index": 0}], [{"node": "msg_pleasewait", "type": "main", "index": 0}, {"node": "Merge2", "type": "main", "index": 0}], null, [{"node": "Merge", "type": "main", "index": 0}]]}, "Filename": {"main": [[{"node": "City List", "type": "main", "index": 0}]]}, "City List": {"main": [[{"node": "Get weather data", "type": "main", "index": 0}]]}, "Write csv": {"main": [[{"node": "Run R script", "type": "main", "index": 0}]]}, "Run R script": {"main": [[{"node": "R successful?", "type": "main", "index": 0}]]}, "R successful?": {"main": [[{"node": "Read Binary File", "type": "main", "index": 0}], [{"node": "msg_errorR", "type": "main", "index": 0}]]}, "msg_pleasewait": {"main": [[{"node": "Merge2", "type": "main", "index": 1}]]}, "Any errors API?": {"main": [[{"node": "msg_errorAPI", "type": "main", "index": 0}], [{"node": "Convert API response", "type": "main", "index": 0}]]}, "Get weather data": {"main": [[{"node": "Any errors API?", "type": "main", "index": 0}]]}, "Read Binary File": {"main": [[{"node": "msg_getweather", "type": "main", "index": 0}]]}, "Spreadsheet File": {"main": [[{"node": "Write csv", "type": "main", "index": 0}]]}, "Telegram Trigger": {"main": [[{"node": "Switch", "type": "main", "index": 0}]]}, "Convert API response": {"main": [[{"node": "Spreadsheet File", "type": "main", "index": 0}]]}}}