PORTFOLIO/automation/n8n/portfolio-chat-workflow.json

{
  "name": "Portfolio Bryan - AI Chatbot",
  "nodes": [
    {
      "parameters": {
        "httpMethod": "POST",
        "path": "portfolio-chat",
        "responseMode": "responseNode",
        "options": {
          "allowedOrigins": "*"
        }
      },
      "type": "n8n-nodes-base.webhook",
      "typeVersion": 2,
      "position": [
        220,
        340
      ],
      "id": "webhook-trigger",
      "name": "Webhook - Incoming Chat"
    },
    {
      "parameters": {
        "jsCode": "// Sanitización y validación de entrada para proteger cuota de API y prevenir abusos\nconst body = $input.item.json.body || {};\nconst rawMessage = typeof body.message === 'string' ? body.message.trim() : '';\nconst sessionId = typeof body.sessionId === 'string' && body.sessionId ? body.sessionId.slice(0, 64) : 'anon-' + Date.now();\n\nif (!rawMessage) {\n  return [{\n    json: {\n      isValid: false,\n      errorMessage: 'El mensaje no puede estar vacío.',\n      sessionId\n    }\n  }];\n}\n\n// Limitar a máximo 400 caracteres para cuidar tokens gratuitos\nconst cleanMessage = rawMessage.slice(0, 400).replace(/<[^>]*>?/gm, '');\n\nreturn [{\n  json: {\n    isValid: true,\n    cleanMessage,\n    sessionId\n  }\n}];"
      },
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        460,
        340
      ],
      "id": "code-sanitizer",
      "name": "Sanitize & Validate"
    },
    {
      "parameters": {
        "conditions": {
          "options": {
            "caseSensitive": true,
            "leftValue": "",
            "typeValidation": "strict"
          },
          "conditions": [
            {
              "id": "cond-is-valid",
              "leftValue": "={{ $json.isValid }}",
              "rightValue": true,
              "operator": {
                "type": "boolean",
                "operation": "equals"
              }
            }
          ],
          "combinator": "and"
        }
      },
      "type": "n8n-nodes-base.if",
      "typeVersion": 2,
      "position": [
        680,
        340
      ],
      "id": "if-valid-input",
      "name": "Is Input Valid?"
    },
    {
      "parameters": {
        "promptType": "define",
        "text": "={{ $('Sanitize & Validate').item.json.cleanMessage }}",
        "options": {
          "systemMessage": "=Eres el asistente virtual oficial de Bryan Baño en su portafolio web personal.\n\n### CONTEXTO DE BRYAN BAÑO:\n- Ingeniero en Computación (EPN, Quito - Ecuador).\n- Especialidad: .NET 8/9 Clean Architecture (CQRS MediatR, EF Core MySQL) y Angular Signals (OnPush, Canvas 2D).\n- Filosofía de Software: Ponytail (Simplicidad extrema, YAGNI, cero sobreingeniería, Web Platform nativa, 60 FPS).\n- Proyectos Destacados: Auditoría CACES (.NET), Incident Simulator Cloud Security (Serverless), Portafolio Interactivo Cyber-Zen.\n- Certificaciones: EC-Council Network Defense Essentials (NDE), Cisco Networking Academy.\n- Ubicación: Quito, Ecuador. Disponible para proyectos y contrataciones remotas globales.\n\n### REGLAS DE RESPUESTA:\n1. Responde siempre en el MISMO idioma del usuario (Español o Inglés).\n2. Sé técnico, conciso, profesional y cálido (máximo 2 a 3 párrafos o viñetas breves).\n3. No inventes experiencia que no esté en este contexto.\n4. Si el visitante desea contactar a Bryan o contratarlo, indícale amablemente que use el formulario de contacto del portafolio o su perfil de LinkedIn."
        }
      },
      "type": "@n8n/n8n-nodes-langchain.agent",
      "typeVersion": 1.7,
      "position": [
        920,
        240
      ],
      "id": "ai-agent-bryan",
      "name": "AI Agent - Bryan Assistant"
    },
    {
      "parameters": {
        "modelName": "models/gemini-2.0-flash",
        "options": {
          "temperature": 0.4
        }
      },
      "type": "@n8n/n8n-nodes-langchain.lmChatGoogleGemini",
      "typeVersion": 1,
      "position": [
        880,
        480
      ],
      "id": "gemini-model",
      "name": "Google Gemini Chat Model",
      "credentials": {
        "googleGeminiApi": {
          "id": "gemini-free-cred",
          "name": "Google Gemini Free API"
        }
      }
    },
    {
      "parameters": {
        "sessionKey": "={{ $('Sanitize & Validate').item.json.sessionId }}",
        "contextWindowLength": 8
      },
      "type": "@n8n/n8n-nodes-langchain.memoryBufferWindow",
      "typeVersion": 1.3,
      "position": [
        1040,
        480
      ],
      "id": "window-memory",
      "name": "Window Buffer Memory"
    },
    {
      "parameters": {
        "respondWith": "json",
        "responseBody": "={\n  \"reply\": {{ JSON.stringify($json.output) }},\n  \"sessionId\": {{ JSON.stringify($('Sanitize & Validate').item.json.sessionId) }}\n}",
        "options": {
          "responseCode": 200,
          "responseHeaders": {
            "entries": [
              {
                "name": "Access-Control-Allow-Origin",
                "value": "*"
              },
              {
                "name": "Access-Control-Allow-Methods",
                "value": "POST, OPTIONS"
              },
              {
                "name": "Access-Control-Allow-Headers",
                "value": "Content-Type"
              }
            ]
          }
        }
      },
      "type": "n8n-nodes-base.respondToWebhook",
      "typeVersion": 1.1,
      "position": [
        1220,
        240
      ],
      "id": "respond-success",
      "name": "Respond - Success"
    },
    {
      "parameters": {
        "respondWith": "json",
        "responseBody": "={\n  \"reply\": {{ JSON.stringify($json.errorMessage || 'Mensaje no válido.') }},\n  \"sessionId\": {{ JSON.stringify($json.sessionId) }}\n}",
        "options": {
          "responseCode": 400,
          "responseHeaders": {
            "entries": [
              {
                "name": "Access-Control-Allow-Origin",
                "value": "*"
              }
            ]
          }
        }
      },
      "type": "n8n-nodes-base.respondToWebhook",
      "typeVersion": 1.1,
      "position": [
        1220,
        420
      ],
      "id": "respond-error",
      "name": "Respond - Error"
    }
  ],
  "connections": {
    "Webhook - Incoming Chat": {
      "main": [
        [
          {
            "node": "Sanitize & Validate",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Sanitize & Validate": {
      "main": [
        [
          {
            "node": "Is Input Valid?",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Is Input Valid?": {
      "main": [
        [
          {
            "node": "AI Agent - Bryan Assistant",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "Respond - Error",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "AI Agent - Bryan Assistant": {
      "main": [
        [
          {
            "node": "Respond - Success",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Google Gemini Chat Model": {
      "ai_languageModel": [
        [
          {
            "node": "AI Agent - Bryan Assistant",
            "type": "ai_languageModel",
            "index": 0
          }
        ]
      ]
    },
    "Window Buffer Memory": {
      "ai_memory": [
        [
          {
            "node": "AI Agent - Bryan Assistant",
            "type": "ai_memory",
            "index": 0
          }
        ]
      ]
    }
  },
  "settings": {
    "executionOrder": "v1"
  }
}