Workflow: construct a n8n workflow for Manual Markdown Create Webhook
Integrations: emailSend, function, httpRequest, itemLists, manualTrigger, markdown, merge, moveBinaryData

{"nodes": [{"name": "On clicking 'execute'", "type": "n8n-nodes-base.manualTrigger", "position": [120, 560], "parameters": {}, "typeVersion": 1}, {"name": "SortElements", "type": "n8n-nodes-base.itemLists", "position": [480, 560], "parameters": {"options": {}, "operation": "sort", "sortFieldsUi": {"sortField": [{"fieldName": "UserName"}, {"fieldName": "TaskTitle"}, {"fieldName": "date"}]}}, "typeVersion": 1}, {"name": "Markdown", "type": "n8n-nodes-base.markdown", "position": [1340, 580], "parameters": {"mode": "markdownToHtml", "options": {"tables": true, "noHeaderId": true, "rawHeaderId": false, "simpleLineBreaks": true, "customizedHeaderId": false, "completeHTMLDocument": true}, "markdown": "={{$json[\"mdreport\"]}}"}, "typeVersion": 1}, {"name": "CreateMDReport", "type": "n8n-nodes-base.function", "position": [1160, 580], "parameters": {"functionCode": "// created report header and custom table style\nvar md_reporthead=\"#Timesheet report\\n\";\nvar md_style =  (`\n<style> table {border: 0.5px solid; border-spacing: 0px;}\n        table th {border-bottom: 0.5px solid;}\n        table thead {background: #D0E4F5;}\n        table tr:nth-child(even) { background: #D8D8D8;}\n</style>\\n\\n`);\n\nvar md_reportbody=md_style+md_reporthead;\n\n//declare several variables that are used for report generation\nvar tablehead = \"| Date | Hours | Task Description |\\n|:---|:---:|---|\\n\";\n\nvar cur_user=\"\";\nvar cur_usernum=0;\n\nvar cur_task=\"\";\nvar cur_tasktotal=0;\n\n\nfor (item of items) {\n  \n  // Check if new user\n  if (item.json.UserName != cur_user) {\n    // Close previous user's task\n    md_reportbody += (cur_tasktotal) ? \"\\n*\"+cur_tasktotal.toFixed(2)+\" - Total hours for this task*\\n\" : \"\";\n    cur_tasktotal = 0; cur_task=\"\";\n\n    // add new user and embed avatar as base64 image\n    cur_user = item.json.UserName;\n    md_reportbody += `\\n##![img](data:image/png;base64,${items[cur_usernum].binary.data.data}) ${cur_user}\\n`;\n    cur_usernum   += 1;\n  } // Check for new user - ENDIF\n\n\n  // Check if new task\n  if (item.json.TaskTitle != cur_task) {\n\n    // if not empty task - add total amount of hours for *previous* task\n    md_reportbody += (cur_tasktotal) ? `\\n*${cur_tasktotal.toFixed(2)} - Total hours for this task*\\n` : \"\";\n\n    // Add new task header and reset total hours counter\n    cur_task = item.json.TaskTitle;\n    md_reportbody += `\\n###${cur_task}\\n${tablehead}`;\n    cur_tasktotal = 0;\n  } // Check for new task - ENDIF\n\n  // Add current task + update total hours\n   md_reportbody += `| ${item.json.date.split('T',1)} | ${item.json.hours.toFixed(2)} | ${item.json.note} |\\n`;\n   cur_tasktotal += item.json.hours;\n}\n\n// Let's not forget the last task's total hours:\nmd_reportbody += (cur_tasktotal) ? `\\n*${cur_tasktotal.toFixed(2)} - Total hours for this task*\\n` : \"\";\n\n// Finalise the report\nmd_reportbody += `\\n*Timesheet report generated on: ${$now.toISODate()}*`;\nmd_reporthead += \"\\n\";\n\nreturn [{mdreport: md_reportbody}];"}, "typeVersion": 1}, {"name": "Send Email", "type": "n8n-nodes-base.emailSend", "disabled": true, "position": [1760, 580], "parameters": {"options": {"allowUnauthorizedCerts": false}, "subject": "TimeSheet report", "attachments": "data"}, "credentials": {"smtp": {"id": "2", "name": "info@stats.consult"}}, "typeVersion": 1}, {"name": "GetImg", "type": "n8n-nodes-base.itemLists", "position": [640, 760], "parameters": {"compare": "selectedFields", "options": {"removeOtherFields": true}, "operation": "removeDuplicates", "fieldsToCompare": {"fields": [{"fieldName": "UserAvatar"}]}}, "typeVersion": 1}, {"name": "ImgBinary", "type": "n8n-nodes-base.httpRequest", "position": [820, 760], "parameters": {"url": "={{$json[\"UserAvatar\"]}}", "options": {}, "responseFormat": "file"}, "typeVersion": 2}, {"name": "Merge2", "type": "n8n-nodes-base.merge", "position": [980, 580], "parameters": {"join": "outer", "mode": "mergeByIndex"}, "typeVersion": 1}, {"name": "Move Binary Data1", "type": "n8n-nodes-base.moveBinaryData", "position": [1520, 580], "parameters": {"mode": "jsonToBinary", "options": {"fileName": "report.html", "mimeType": "text/html", "useRawData": true}, "convertAllData": false}, "typeVersion": 1}, {"name": "GetTimesheetRecords", "type": "n8n-nodes-base.function", "position": [300, 560], "parameters": {"functionCode": "return [{UserName: \"User 1 - Lead Programmer\",\n         UserAvatar: \"https://www.gravatar.com/avatar/?d=robohash&s=32\",\n         TaskTitle: \"Admin\",\n         date: \"2022-05-31T00:00:00.0000000+02:00\",\n         note: \"Creating invoices and submitting timesheets\",\n         hours: 0.5},\n         {UserName: \"User 1 - Lead Programmer\",\n         UserAvatar: \"https://www.gravatar.com/avatar/?d=robohash&s=32\",\n         TaskTitle: \"Admin\",\n         date: \"2022-05-02T00:00:00.0000000+02:00\",\n         note: \"Reporting last month's activity\",\n         hours: 0.5},\n         {UserName: \"User 2 - Designer\",\n         UserAvatar: \"https://www.gravatar.com/avatar/?d=identicon&s=32\",\n         TaskTitle: \"Admin\",\n         date: \"2022-05-30T00:00:00.0000000+02:00\",\n         note: \"Filling timesheets\",\n         hours: 0.5},\n         {UserName: \"User 2 - Designer\",\n         UserAvatar: \"https://www.gravatar.com/avatar/?d=identicon&s=32\",\n         TaskTitle: \"Admin\",\n         date: \"2022-05-03T00:00:00.0000000+02:00\",\n         note: \"Monthly retro meeting\",\n         hours: 0.5},\n         {UserName: \"User 1 - Lead Programmer\",\n         UserAvatar: \"https://www.gravatar.com/avatar/?d=robohash&s=32\",\n         TaskTitle: \"Client 1\",\n         date: \"2022-05-26T00:00:00.0000000+02:00\",\n         note: \"Weekly meeting\",\n         hours: 0.5},\n         {UserName: \"User 1 - Lead Programmer\",\n         UserAvatar: \"https://www.gravatar.com/avatar/?d=robohash&s=32\",\n         TaskTitle: \"Client 1\",\n         date: \"2022-05-05T00:00:00.0000000+02:00\",\n         note: \"Weekly meeting\",\n         hours: 0.5},\n         {UserName: \"User 1 - Lead Programmer\",\n         UserAvatar: \"https://www.gravatar.com/avatar/?d=robohash&s=32\",\n         TaskTitle: \"Client 1\",\n         date: \"2022-05-19T00:00:00.0000000+02:00\",\n         note: \"Weekly meeting\",\n         hours: 0.5},\n         {UserName: \"User 1 - Lead Programmer\",\n         UserAvatar: \"https://www.gravatar.com/avatar/?d=robohash&s=32\",\n         TaskTitle: \"Client 1\",\n         date: \"2022-05-12T00:00:00.0000000+02:00\",\n         note: \"Weekly meeting\",\n         hours: 0.5},\n         {UserName: \"User 1 - Lead Programmer\",\n         UserAvatar: \"https://www.gravatar.com/avatar/?d=robohash&s=32\",\n         TaskTitle: \"Client 1\",\n         date: \"2022-05-12T00:00:00.0000000+02:00\",\n         note: \"Programmed new feature\",\n         hours: 4.5},\n         {UserName: \"User 1 - Lead Programmer\",\n         UserAvatar: \"https://www.gravatar.com/avatar/?d=robohash&s=32\",\n         TaskTitle: \"Client 1\",\n         date: \"2022-05-02T00:00:00.0000000+02:00\",\n         note: \"Updated this and that\",\n         hours: 2.75},\n         {UserName: \"User 2 - Designer\",\n         UserAvatar: \"https://www.gravatar.com/avatar/?d=identicon&s=32\",\n         TaskTitle: \"Client 2\",\n         date: \"2022-05-13T00:00:00.0000000+02:00\",\n         note: \"Designed a new report template\",\n         hours: 6.5},\n         {UserName: \"User 2 - Designer\",\n         UserAvatar: \"https://www.gravatar.com/avatar/?d=identicon&s=32\",\n         TaskTitle: \"Client 2\",\n         date: \"2022-05-23T00:00:00.0000000+02:00\",\n         note: \"Presented the results\",\n         hours: 1.5}\n         ];"}, "typeVersion": 1}], "connections": {"GetImg": {"main": [[{"node": "ImgBinary", "type": "main", "index": 0}]]}, "Merge2": {"main": [[{"node": "CreateMDReport", "type": "main", "index": 0}]]}, "Markdown": {"main": [[{"node": "Move Binary Data1", "type": "main", "index": 0}]]}, "ImgBinary": {"main": [[{"node": "Merge2", "type": "main", "index": 1}]]}, "SortElements": {"main": [[{"node": "GetImg", "type": "main", "index": 0}, {"node": "Merge2", "type": "main", "index": 0}]]}, "CreateMDReport": {"main": [[{"node": "Markdown", "type": "main", "index": 0}]]}, "Move Binary Data1": {"main": [[{"node": "Send Email", "type": "main", "index": 0}]]}, "GetTimesheetRecords": {"main": [[{"node": "SortElements", "type": "main", "index": 0}]]}, "On clicking 'execute'": {"main": [[{"node": "GetTimesheetRecords", "type": "main", "index": 0}]]}}}