{
  "name": "Weekly Mattermost Coffee Groups",
  "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\nif (data_as_array.length < 2) return [];\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": "mattermost-weekly-coffee-groups-0"
    },
    {
      "name": "Greetings",
      "type": "n8n-nodes-base.mattermost",
      "position": [
        650,
        300
      ],
      "parameters": {
        "message": "👋 Happy Monday\n\nGroups for this week's virtual coffee are:",
        "channelId": "YOUR_MATTERMOST_CHANNEL_ID",
        "attachments": [],
        "otherOptions": {}
      },
      "typeVersion": 1,
      "id": "mattermost-weekly-coffee-groups-1"
    },
    {
      "name": "Weekly trigger on monday",
      "type": "n8n-nodes-base.cron",
      "position": [
        450,
        300
      ],
      "parameters": {
        "triggerTimes": {
          "item": [
            {
              "mode": "everyWeek",
              "weekday": "1",
              "hour": 10,
              "minute": 0
            }
          ]
        }
      },
      "typeVersion": 1,
      "id": "mattermost-weekly-coffee-groups-2"
    },
    {
      "name": "Announce groups",
      "type": "n8n-nodes-base.mattermost",
      "position": [
        1250,
        200
      ],
      "parameters": {
        "message": "=☀️ {{$node[\"Divide into groups\"].json[\"groupsUsername\"].join(', ')}}",
        "channelId": "={{ $node[\"Greetings\"].parameter[\"channelId\"] }}",
        "attachments": [],
        "otherOptions": {}
      },
      "typeVersion": 1,
      "id": "mattermost-weekly-coffee-groups-3"
    },
    {
      "name": "Employees in coffee chat channel",
      "type": "n8n-nodes-base.mattermost",
      "position": [
        850,
        300
      ],
      "parameters": {
        "resource": "user",
        "operation": "getAll",
        "additionalFields": {
          "inChannel": "={{$node[\"Greetings\"].parameter[\"channelId\"]}}"
        }
      },
      "typeVersion": 1,
      "id": "mattermost-weekly-coffee-groups-4"
    },
    {
      "name": "Send calendar invites",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        1250,
        400
      ],
      "parameters": {
        "method": "POST",
        "url": "={{ \"https://www.googleapis.com/calendar/v3/calendars/\" + encodeURIComponent($(\"Choose session time\").first().json.calendarId) + \"/events?conferenceDataVersion=1&sendUpdates=all\" }}",
        "authentication": "predefinedCredentialType",
        "nodeCredentialType": "googleCalendarOAuth2Api",
        "sendBody": true,
        "specifyBody": "json",
        "jsonBody": "={{ {summary:\"n8n coffee catchup\",start:{dateTime:$(\"Choose session time\").first().json.start},end:{dateTime:$(\"Choose session time\").first().json.end},attendees:$(\"Divide into groups\").item.json.groupsEmail.map(email=>({email})),guestsCanModify:true,conferenceData:{createRequest:{requestId:$execution.id+\"-\"+$itemIndex,conferenceSolutionKey:{type:\"hangoutsMeet\"}}}} }}",
        "options": {
          "response": {
            "response": {
              "responseFormat": "json"
            }
          }
        }
      },
      "typeVersion": 4.2,
      "id": "mattermost-weekly-coffee-groups-5"
    },
    {
      "id": "mattermost-weekly-coffee-groups-time",
      "name": "Choose session time",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        390,
        120
      ],
      "parameters": {
        "mode": "runOnceForAllItems",
        "jsCode": "const t=Date.now(); return [{json:{calendarId:\"YOUR_GOOGLE_CALENDAR_ID\",start:new Date(t+3600000).toISOString(),end:new Date(t+5400000).toISOString()}}];"
      }
    }
  ],
  "active": false,
  "settings": {
    "timezone": "UTC",
    "executionOrder": "v1"
  },
  "connections": {
    "Greetings": {
      "main": [
        [
          {
            "node": "Employees in coffee chat channel",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Divide into groups": {
      "main": [
        [
          {
            "node": "Announce groups",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Weekly trigger on monday": {
      "main": [
        [
          {
            "node": "Choose session time",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Employees in coffee chat channel": {
      "main": [
        [
          {
            "node": "Divide into groups",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Choose session time": {
      "main": [
        [
          {
            "node": "Greetings",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Announce groups": {
      "main": [
        [
          {
            "node": "Send calendar invites",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "pinData": {}
}