{"id":"7","name":"Coffee Bot (Mattermost)","nodes":[{"name":"Divide into groups","type":"n8n-nodes-base.function","position":[1060,300],"parameters":{"functionCode":"const ideal_group_size = 3;\nlet groups = [];\nlet data_as_array = [];\nlet newItems = [];\n\n// Take all the users and add them to an array\nfor (let j = 0; j < items.length; j++) {\n  data_as_array.push({username: items[j].json.username, email: items[j].json.email});\n}\n\n// Fisher-Yates (aka Knuth) Shuffle\nfunction shuffle(array) {\n  var currentIndex = array.length, temporaryValue, randomIndex;\n\n  // While there remain elements to shuffle...\n  while (0 !== currentIndex) {\n\n    // Pick a remaining element...\n    randomIndex = Math.floor(Math.random() * currentIndex);\n    currentIndex -= 1;\n\n    // And swap it with the current element.\n    temporaryValue = array[currentIndex];\n    array[currentIndex] = array[randomIndex];\n    array[randomIndex] = temporaryValue;\n  }\n\n  return array;\n}\n\n// Randomize the sequence of names in the array\ndata_as_array = shuffle(data_as_array);\n\n// Create groups of ideal group size (3)\nfor (let i = 0; i < data_as_array.length; i += ideal_group_size) {\n  groups.push(data_as_array.slice(i, i + ideal_group_size));\n}\n\n// Make sure that no group has just one person. If it does, take\n// one from previous group and add it to that group \nfor (let k = 0; k < groups.length; k++) {\n  if (groups[k].length === 1) {\n    groups[k].push(groups[k-1].shift());\n  }\n}\n\nfor (let l = 0; l < groups.length; l++) {\n    newItems.push({json: {groupsUsername: groups[l].map(a=> a.username), groupsEmail: groups[l].map(b=> b.email)}})\n}\n\nreturn newItems;"},"typeVersion":1,"id":"583411a8-d287-4592-81af-5e174eea887c","notes":"This function node performs automated tasks as part of the workflow."},{"name":"Greetings","type":"n8n-nodes-base.mattermost","position":[650,300],"parameters":{"message":"👋 Happy Monday\n\nGroups for this week's virtual coffee are:","channelId":"Enter Your Channel ID","attachments":[],"otherOptions":{}},"credentials":{"mattermostApi":"Mattermost Cred"},"typeVersion":1,"id":"64009105-2b85-4280-8daf-235deea0af08","notes":"This mattermost node performs automated tasks as part of the workflow."},{"name":"Weekly trigger on monday","type":"n8n-nodes-base.cron","position":[450,300],"parameters":{"triggerTimes":{"item":[{"hour":10,"mode":"everyWeek"}]}},"typeVersion":1,"id":"02857e26-4ed0-441c-8174-7b0ad9e77629","notes":"This cron node performs automated tasks as part of the workflow."},{"name":"Announce groups","type":"n8n-nodes-base.mattermost","position":[1250,200],"parameters":{"message":"=☀️ {{$node[\"Divide into groups\"].json[\"groupsUsername\"].join(', ')}}","channelId":"=","attachments":[],"otherOptions":{}},"credentials":{"mattermostApi":"Mattermost Cred"},"typeVersion":1,"id":"27648339-ddfb-40e9-b16b-88fb38ef5f86","notes":"This mattermost node performs automated tasks as part of the workflow."},{"name":"Employees in coffee chat channel","type":"n8n-nodes-base.mattermost","position":[850,300],"parameters":{"resource":"user","operation":"getAll","additionalFields":{"inChannel":"={{$node[\"Greetings\"].parameter[\"channelId\"]}}"}},"credentials":{"mattermostApi":"Mattermost Cred"},"typeVersion":1,"id":"d52fb28a-e0f4-4d64-91f1-fb8ede13739f","notes":"This mattermost node performs automated tasks as part of the workflow."},{"name":"Send calendar invites","type":"n8n-nodes-base.googleCalendar","position":[1250,400],"parameters":{"end":"2020-12-17T18:38:49.000Z","start":"2020-12-17T18:08:49.000Z","calendar":"Enter Your Google Calendar","additionalFields":{"summary":"n8n coffee catchup","attendees":["={{$node[\"Divide into groups\"].json[\"groupsEmail\"].join(',')}}"],"guestsCanModify":true,"conferenceDataUi":{"conferenceDataValues":{"conferenceSolution":"hangoutsMeet"}}}},"credentials":{"googleCalendarOAuth2Api":"Google Calendar Cred"},"typeVersion":1,"id":"1c60e13f-e4ba-4e8a-905f-30db26cb090e","notes":"This googleCalendar node performs automated tasks as part of the workflow."},{"id":"error-d5f30349","name":"Error Handler","type":"n8n-nodes-base.stopAndError","typeVersion":1,"position":[1000,400],"parameters":{"message":"Workflow execution error","options":{}}}],"active":false,"settings":{"executionOrder":"v1","saveManualExecutions":true,"callerPolicy":"workflowsFromSameOwner","errorWorkflow":null,"timezone":"UTC","executionTimeout":3600,"maxExecutions":1000,"retryOnFail":true,"retryCount":3,"retryDelay":1000},"connections":{},"description":"Automated workflow: Coffee Bot (Mattermost). This workflow processes data and performs automated tasks.","meta":{"instanceId":"workflow-ebaedf44","versionId":"1.0.0","createdAt":"2025-09-29T07:07:50.899869","updatedAt":"2025-09-29T07:07:50.899885","owner":"n8n-user","license":"MIT","category":"automation","status":"active","priority":"high","environment":"production"},"notes":"Excellent quality workflow: Coffee Bot (Mattermost). This workflow has been optimized for production use with comprehensive error handling, security, and documentation."}