Workflow: design n8n workflow for Splitout Webhook Update Webhook
Integrations: code, httpRequest, if, splitOut, stickyNote, webhook

{"meta": {"instanceId": "408f9fb9940c3cb18ffdef0e0150fe342d6e655c3a9fac21f0f644e8bedabcd9", "templateCredsSetupCompleted": true}, "nodes": [{"id": "2a5a96c9-926c-447d-8244-db760e48a45f", "name": "Sticky Note", "type": "n8n-nodes-base.stickyNote", "position": [-180, -140], "parameters": {"content": "## Edit your own prompt \u2b07\ufe0f\n"}, "typeVersion": 1}, {"id": "4c3a6b0b-2771-441d-8cb2-e17c07a92156", "name": "Sticky Note2", "type": "n8n-nodes-base.stickyNote", "position": [-1440, -100], "parameters": {"content": "## Filter comments and customize your trigger words \u2b07\ufe0f"}, "typeVersion": 1}, {"id": "4f42b776-cc24-486c-889f-7c09522503ed", "name": "Sticky Note3", "type": "n8n-nodes-base.stickyNote", "position": [-1180, -120], "parameters": {"content": "## Replace your gitlab URL and token \u2b07\ufe0f"}, "typeVersion": 1}, {"id": "b8859219-ce90-4940-8d9e-338c742def5e", "name": "Sticky Note4", "type": "n8n-nodes-base.stickyNote", "position": [140, -140], "parameters": {"content": "## Replace your gitlab URL and token \u2b07\ufe0f"}, "typeVersion": 1}, {"id": "6be296f3-bd61-4644-825f-d96d591f229e", "name": "Need Review", "type": "n8n-nodes-base.if", "position": [-1440, 100], "parameters": {"options": {}, "conditions": {"options": {"version": 2, "leftValue": "", "caseSensitive": true, "typeValidation": "strict"}, "combinator": "and", "conditions": [{"id": "617eb2c5-dd4b-4e28-b533-0c32ea6ca961", "operator": {"name": "filter.operator.equals", "type": "string", "operation": "equals"}, "leftValue": "={{ $json.body.object_attributes.note }}", "rightValue": "+0"}]}}, "typeVersion": 2.2}, {"id": "fe59eeab-03a1-4b36-97f2-bf04bf6e4b8d", "name": "Get Changes", "type": "n8n-nodes-base.httpRequest", "position": [-1180, 80], "parameters": {"url": "=https://gitlab.com/api/v4/projects/{{ $json[\"body\"][\"project_id\"] }}/merge_requests/{{ $json[\"body\"][\"merge_request\"][\"iid\"] }}/changes", "options": {}, "sendHeaders": true, "headerParameters": {"parameters": [{"name": "PRIVATE-TOKEN"}]}}, "typeVersion": 4.2}, {"id": "4fe2800c-1eb5-44c6-93bb-25285a015b1d", "name": "Split Out", "type": "n8n-nodes-base.splitOut", "position": [-1000, 80], "parameters": {"options": {}, "fieldToSplitOut": "changes"}, "typeVersion": 1}, {"id": "1838ffe7-a846-473b-9716-2714d527c727", "name": "Skip File Changes", "type": "n8n-nodes-base.if", "position": [-820, 80], "parameters": {"options": {}, "conditions": {"options": {"version": 2, "leftValue": "", "caseSensitive": true, "typeValidation": "strict"}, "combinator": "and", "conditions": [{"id": "c6e1430b-84a7-47ce-8fe9-7b94da0f2d31", "operator": {"type": "boolean", "operation": "false", "singleValue": true}, "leftValue": "={{ $json.renamed_file }}", "rightValue": ""}, {"id": "bf6e9eb9-d72d-459c-a722-9614bab8842c", "operator": {"type": "boolean", "operation": "false", "singleValue": true}, "leftValue": "={{ $json.deleted_file }}", "rightValue": ""}, {"id": "501623a9-9515-4034-bb13-a5a6a4f924eb", "operator": {"type": "string", "operation": "startsWith"}, "leftValue": "={{ $json.diff }}", "rightValue": "@@"}]}}, "typeVersion": 2.2}, {"id": "6215ecd2-55ad-4652-8c1f-f08713fdc237", "name": "Parse Last Diff Line", "type": "n8n-nodes-base.code", "position": [-560, -120], "parameters": {"mode": "runOnceForEachItem", "jsCode": "const parseLastDiff = (gitDiff) => {\n  gitDiff = gitDiff.replace(/\\n\\\\ No newline at end of file/, '')\n  \n  const diffList = gitDiff.trimEnd().split('\\n').reverse();\n  const lastLineFirstChar = diffList?.[0]?.[0];\n  const lastDiff =\n    diffList.find((item) => {\n      return /^@@ \\-\\d+,\\d+ \\+\\d+,\\d+ @@/g.test(item);\n    }) || '';\n\n  const [lastOldLineCount, lastNewLineCount] = lastDiff\n    .replace(/@@ \\-(\\d+),(\\d+) \\+(\\d+),(\\d+) @@.*/g, ($0, $1, $2, $3, $4) => {\n      return `${+$1 + +$2},${+$3 + +$4}`;\n    })\n    .split(',');\n  \n  if (!/^\\d+$/.test(lastOldLineCount) || !/^\\d+$/.test(lastNewLineCount)) {\n    return {\n      lastOldLine: -1,\n      lastNewLine: -1,\n      gitDiff,\n    };\n  }\n\n\n  const lastOldLine = lastLineFirstChar === '+' ? null : (parseInt(lastOldLineCount) || 0) - 1;\n  const lastNewLine = lastLineFirstChar === '-' ? null : (parseInt(lastNewLineCount) || 0) - 1;\n\n  return {\n    lastOldLine,\n    lastNewLine,\n    gitDiff,\n  };\n};\n\nreturn parseLastDiff($input.item.json.diff)\n"}, "typeVersion": 2}, {"id": "bb3d6be0-7e85-4c2e-840a-090a36b48236", "name": "Basic LLM Chain", "type": "@n8n/n8n-nodes-langchain.chainLlm", "position": [-180, 60], "parameters": {"text": "=File path\uff1a{{ $('Skip File Changes').item.json.new_path }}\n\n```Original code\n {{ $json.originalCode }}\n```\nchange to\n```New code\n {{ $json.newCode }}\n```\nPlease review the code changes in this section:", "messages": {"messageValues": [{"message": "# Overview:| You are a senior programming expert Bot, responsible for reviewing code changes and providing review recommendations. At the beginning of the suggestion, it is necessary to clearly make a decision to \"reject\" or \"accept\" the code change, and rate the change in the format \"Change Score: Actual Score\", with a score range of 0-100 points. Then, point out the existing problems in concise language and a stern tone. If you feel it is necessary, you can directly provide the modified content. Your review proposal must use rigorous Markdown format."}]}, "promptType": "define"}, "typeVersion": 1.5}, {"id": "f3a6e8c6-eda1-4af1-bdd5-f3b56ef8c23b", "name": "OpenAI Chat Model", "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi", "position": [-180, 220], "parameters": {"model": {"__rl": true, "mode": "list", "value": "gpt-4o-mini"}, "options": {}}, "credentials": {"openAiApi": {"id": "8gccIjcuf3gvaoEr", "name": "OpenAi account"}}, "typeVersion": 1.2}, {"id": "796b0d0f-320f-43ff-943a-0d15b73878c7", "name": "Webhook", "type": "n8n-nodes-base.webhook", "position": [-1680, 100], "webhookId": "78214945-1731-46ca-a13f-132df9ee1d14", "parameters": {"path": "e21095c0-1876-4cd9-9e92-a2eac737f03e", "options": {}, "httpMethod": "POST"}, "typeVersion": 2}, {"id": "74a7dd0c-fc01-411c-8ea9-e43b45c376c2", "name": "Code", "type": "n8n-nodes-base.code", "position": [-360, -120], "parameters": {"mode": "runOnceForEachItem", "jsCode": "// Loop over input items and add a new field called 'myNewField' to the JSON of each one\nvar diff = $input.item.json.gitDiff\n\nlet lines = diff.trimEnd().split('\\n');\n\nlet originalCode = '';\nlet newCode = '';\n\nlines.forEach(line => {\n  console.log(line)\n    if (line.startsWith('-')) {\n        originalCode += line + \"\\n\";\n    } else if (line.startsWith('+')) {\n        newCode += line + \"\\n\";\n    } else {\n        originalCode += line + \"\\n\";\n        newCode += line + \"\\n\";\n    }\n});\n\nreturn {\n  originalCode:originalCode,\n  newCode:newCode\n};\n\n"}, "typeVersion": 2}, {"id": "d55f0b8f-aac5-49e3-a5f1-9dd1a7c46254", "name": "Post Discussions", "type": "n8n-nodes-base.httpRequest", "position": [240, 60], "parameters": {"url": "=https://gitlab.com/api/v4/projects/{{ $('Webhook').item.json[\"body\"][\"project_id\"] }}/merge_requests/{{ $('Webhook').item.json[\"body\"][\"merge_request\"][\"iid\"] }}/discussions", "method": "POST", "options": {}, "sendBody": true, "contentType": "multipart-form-data", "sendHeaders": true, "bodyParameters": {"parameters": [{"name": "body", "value": "={{ $('Basic LLM Chain').item.json[\"text\"] }}"}, {"name": "position[position_type]", "value": "text"}, {"name": "position[old_path]", "value": "={{ $('Split Out').item.json.old_path }}"}, {"name": "position[new_path]", "value": "={{ $('Split Out').item.json.new_path }}"}, {"name": "position[start_sha]", "value": "={{ $('Get Changes').item.json.diff_refs.start_sha }}"}, {"name": "position[head_sha]", "value": "={{ $('Get Changes').item.json.diff_refs.head_sha }}"}, {"name": "position[base_sha]", "value": "={{ $('Get Changes').item.json.diff_refs.base_sha }}"}, {"name": "position[new_line]", "value": "={{ $('Parse Last Diff Line').item.json.lastNewLine || ''  }}"}, {"name": "position[old_line]", "value": "={{ $('Parse Last Diff Line').item.json.lastOldLine || '' }}"}]}, "headerParameters": {"parameters": [{"name": "PRIVATE-TOKEN"}]}}, "typeVersion": 4.2}], "pinData": {}, "connections": {"Code": {"main": [[{"node": "Basic LLM Chain", "type": "main", "index": 0}]]}, "Webhook": {"main": [[{"node": "Need Review", "type": "main", "index": 0}]]}, "Split Out": {"main": [[{"node": "Skip File Changes", "type": "main", "index": 0}]]}, "Get Changes": {"main": [[{"node": "Split Out", "type": "main", "index": 0}]]}, "Need Review": {"main": [[{"node": "Get Changes", "type": "main", "index": 0}]]}, "Basic LLM Chain": {"main": [[{"node": "Post Discussions", "type": "main", "index": 0}]]}, "OpenAI Chat Model": {"ai_languageModel": [[{"node": "Basic LLM Chain", "type": "ai_languageModel", "index": 0}]]}, "Skip File Changes": {"main": [[{"node": "Parse Last Diff Line", "type": "main", "index": 0}]]}, "Parse Last Diff Line": {"main": [[{"node": "Code", "type": "main", "index": 0}]]}}}