{ "nodes": [ { "parameters": { "httpMethod": "POST", "path": "upload", "options": {} }, "id": "2c602eb6-bc04-4fd6-abef-77039a77e4bf", "name": "Server webhook", "type": "n8n-nodes-base.webhook", "typeVersion": 1, "position": [ -496, -432 ] }, { "parameters": { "jsCode": "const item = items[0];\n\nlet binary, fileName, mimeType, userEmail;\n\nif (item.binary?.data) {\n // Telegram case\n binary = item.binary.data;\n fileName = item.binary.data.fileName;\n mimeType = item.binary.data.mimeType;\n} else if (item.binary?.file) {\n // Webhook case (if uploaded binary exists here)\n binary = item.binary.file;\n fileName = item.binary.file.fileName;\n mimeType = item.binary.file.mimeType;\n} else {\n // JSON-only upload (base64 in body)\n binary = { data: item.json.file };\n fileName = item.json.filename;\n mimeType = item.json.mimeType;\n}\n\nreturn [{\n json: {\n file: binary.data, // always base64 here\n filename: fileName,\n userEmail: item.json.body?.userEmail || item.json.userEmail,\n mimeType: mimeType\n },\n binary: {\n file: binary // keep raw binary if exists\n }\n}];\n" }, "type": "n8n-nodes-base.code", "typeVersion": 2, "position": [ -32, -272 ], "id": "01035f32-0e92-4fee-8b1f-fccf1165d4da", "name": "Process File Data" }, { "parameters": { "resource": "document", "modelId": { "__rl": true, "value": "models/gemini-2.5-flash", "mode": "list", "cachedResultName": "models/gemini-2.5-flash" }, "text": "You are an **expert AI academic assistant**. Your task is to analyze the assignment content and generate **a single, raw HTML file** as output.\nif you dont think the uploaded file is not an assignment tell the user \" Please upload a valid file (PDF, DOCX, PPTX, PNG, JPG, max 5MB) so I can evaluate\"in an html file format \nwith the output format below.\n ---\n ## Output Format\n * Only raw HTML. Start immediately with ``.\n * Self-contained HTML with:\n - Internal CSS\n - Main title\n - Sections for each question/answer\n * Use `
` for code blocks and `` for tables.\n  \n  ---\n  ## MathJax Support\n  Include MathJax in `` for LaTeX:\n\n  \n  \n\n  ---\n  ## Subject Rules\n\n  ### Mathematics\n  * Provide **full step-by-step solutions**, no skipped steps.\n  * Use LaTeX for all formulas.\n\n  ### Java\n  * Provide **full compilable program**, no comments.\n  * Descriptive variable names.\n  * Only implement requested functionality.\n\n  ### DSA (C language)\n  * Include:\n    1. Algorithm/pseudocode (with comments)\n    2. Full C program (no comments)\n  * Use descriptive variables and simple logic.\n\n  ### Theory of Computation (TOC)\n  * Include sections:\n    1. **Transition Diagram**: Use LaTeX TikZ if possible. Otherwise, use SVG or CSS circles/arrows.\n    2. **Transition Table**: HTML `
` with clear headers.\n    3. **Transition Steps**: Show every state change explicitly.\n\n  ### Unknown Subjects\n  * Provide structured, clear textual answers using headings and lists.\n\n  ---\n  ## Error Handling\n  If content is incomplete/unclear, output a valid HTML page with:\n  `
Assignment content is incomplete or unclear. Please provide more details.
`\n\n  ---\n  ## HTML Skeleton\n  \n  \n  \n    \n    \n    Assignment Solutions\n    \n  \n  \n    
Assignment Solutions
\n    \n  \n  \n\n  ---\n  ## Begin Analysis\n  Analyze the assignment and generate the response strictly following these rules. Output **only the raw HTML document**.\n",
        "inputType": "binary",
        "binaryPropertyName": "file",
        "options": {}
      },
      "type": "@n8n/n8n-nodes-langchain.googleGemini",
      "typeVersion": 1,
      "position": [
        240,
        -272
      ],
      "id": "57febc95-ea1a-45a1-ae47-bb5bc2a1c598",
      "name": "Analyze with Gemini",
      "retryOnFail": true,
      "credentials": {
        "googlePalmApi": {
          "name": ""
        }
      }
    },
    {
      "parameters": {
        "jsCode": "\nlet htmlContent = '';\n\n\nif (\n  items[0].json.content &&\n  items[0].json.content.parts &&\n  items[0].json.content.parts.length > 0 &&\n  items[0].json.content.parts[0].text\n) {\n  htmlContent = items[0].json.content.parts[0].text;\n} else if (\n  items[0].json.candidates &&\n  items[0].json.candidates[0].content &&\n  items[0].json.candidates[0].content.parts[0].text\n) {\n  htmlContent = items[0].json.candidates[0].content.parts[0].text;\n} else {\n htmlContent = JSON.stringify(items[0].json, null, 2);\n}\n\n\n// --- NEW CODE TO CLEAN THE RESPONSE ---\n// This regular expression finds and removes the starting ```html and the closing ```.\n// It also handles surrounding whitespace and newlines, making it robust.\nconst cleanedHtml = htmlContent.replace(/^`{3}(?:html)?\\s*|\\s*`{3}$/g, '').trim();\n\n\nreturn [\n  {\n    json: {\n      html: cleanedHtml}\n  }\n];"
      },
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        432,
        -272
      ],
      "id": "288c2a2b-2990-4a36-9a60-12b93aae589f",
      "name": "Clean HTML"
    },
    {
      "parameters": {
        "method": "POST",
        "url": "https://api.pdfshift.io/v3/convert/pdf",
        "authentication": "genericCredentialType",
        "genericAuthType": "httpBasicAuth",
        "sendBody": true,
        "bodyParameters": {
          "parameters": [
            {
              "name": "=source",
              "value": "={{$json[\"html\"]}}"
            }
          ]
        },
        "options": {
          "response": {
            "response": {
              "responseFormat": "file"
            }
          }
        }
      },
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [
        640,
        -272
      ],
      "id": "dd23c6a3-c27b-407c-8adb-9fd3247b276c",
      "name": "PDFShift API",
      "credentials": {
        "httpBasicAuth": {
          "name": ""
        }
      }
    },
    {
      "parameters": {
        "jsCode": "const current = items[0].json;\n\nconst userEmail = current.userEmail';\n\n// Pass these to next node\nreturn [{\n  json: {\n    userEmail: userEmail,\n  },\n}];"
      },
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        80,
        0
      ],
      "id": "737aa6dd-1881-41a7-aeca-f013575bed5d",
      "name": "user email"
    },
    {
      "parameters": {
        "jsCode": "const htmlItem = items.find(item => item.json.html);\nconst pdfItem = items.find(item => item.binary?.data);\nconst emailItem = items.find(item => item.json.userEmail);\n\nreturn [{\n  json: {\n    html: htmlItem?.json?.html || '',\n    userEmail: emailItem?.json?.userEmail || ''\n  },\n  binary: {\n    file: pdfItem?.binary?.data \n  }\n}];\n"
      },
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        768,
        0
      ],
      "id": "cad84046-ffae-4540-9876-b774d530ddcb",
      "name": "Final Ouputs"
    },
    {
      "parameters": {
        "fromEmail": "losndfoun@gmail.com",
        "toEmail": "={{ $json[\"userEmail\"] }}",
        "subject": "={{ \"Processed Assignment: Ready for Download!!\"}}",
        "html": "=",
        "attachments": "file",
        "options": {
          "allowUnauthorizedCerts": true
        }
      },
      "id": "e356e004-a6a6-49f5-972d-71c7b3d0eaed",
      "name": "Send Email",
      "type": "n8n-nodes-base.emailSend",
      "typeVersion": 1,
      "position": [
        976,
        0
      ],
      "credentials": {
        "smtp": {
          "name": ""
        }
      }
    },
    {
      "parameters": {
        "updates": [
          "message"
        ],
        "additionalFields": {
          "download": true
        }
      },
      "id": "249adff7-8c7f-4b58-88bc-5aeaebc01585",
      "name": "Telegram Trigger",
      "type": "n8n-nodes-base.telegramTrigger",
      "typeVersion": 1.1,
      "position": [
        -816,
        -16
      ],
      "alwaysOutputData": false,
      "executeOnce": false,
      "credentials": {
        "telegramApi": {
          "name": ""
        }
      }
    },
    {
      "parameters": {
        "operation": "sendDocument",
        "chatId": "={{$json[\"chatId\"]}}",
        "binaryData": "={{ true }}",
        "additionalFields": {}
      },
      "id": "f3f242a8-7873-4c43-8332-3f9555af3ad1",
      "name": "Send Back to Telegram",
      "type": "n8n-nodes-base.telegram",
      "typeVersion": 1.2,
      "position": [
        992,
        224
      ],
      "credentials": {
        "telegramApi": {
          "name": ""
        }
      }
    },
    {
      "parameters": {
        "conditions": {
          "options": {
            "caseSensitive": true,
            "leftValue": "",
            "typeValidation": "strict",
            "version": 2
          },
          "conditions": [
            {
              "id": "23aeeee3-0d90-433e-873f-97991801ad5b",
              "leftValue": "={{$json[\"chatId\"]}}",
              "rightValue": "0",
              "operator": {
                "type": "string",
                "operation": "notEmpty",
                "singleValue": true
              }
            }
          ],
          "combinator": "and"
        },
        "options": {}
      },
      "type": "n8n-nodes-base.if",
      "typeVersion": 2.2,
      "position": [
        416,
        240
      ],
      "id": "2b837a57-2292-47bd-b949-b313e3bc3093",
      "name": "If"
    },
    {
      "parameters": {
        "mode": "combine",
        "combineBy": "combineByPosition",
        "options": {
          "includeUnpaired": true
        }
      },
      "type": "n8n-nodes-base.merge",
      "typeVersion": 3.2,
      "position": [
        -80,
        240
      ],
      "id": "6fa7fd10-c972-43f1-a080-4873d988e5e3",
      "name": "Merge2"
    },
    {
      "parameters": {
        "conditions": {
          "options": {
            "caseSensitive": true,
            "leftValue": "",
            "typeValidation": "strict",
            "version": 2
          },
          "conditions": [
            {
              "id": "5173d79e-5f97-4a70-bbd9-38f53d455196",
              "leftValue": "={{ $json.userEmail }}",
              "rightValue": "",
              "operator": {
                "type": "string",
                "operation": "exists",
                "singleValue": true
              }
            }
          ],
          "combinator": "and"
        },
        "options": {}
      },
      "type": "n8n-nodes-base.if",
      "typeVersion": 2.2,
      "position": [
        288,
        0
      ],
      "id": "51962b2c-8de8-465c-8b90-18bf78b8667e",
      "name": "If1"
    },
    {
      "parameters": {
        "chatId": "={{ $json[\"message\"][\"chat\"][\"id\"].toString() }}",
        "text": "file size too large",
        "additionalFields": {}
      },
      "type": "n8n-nodes-base.telegram",
      "typeVersion": 1.2,
      "position": [
        -256,
        0
      ],
      "id": "31ae9589-901b-4575-a96d-4fcb0b9c86de",
      "name": "Send a text message",
      "credentials": {
        "telegramApi": {
          "name": ""
        }
      }
    },
    {
      "parameters": {
        "conditions": {
          "options": {
            "caseSensitive": true,
            "leftValue": "",
            "typeValidation": "loose",
            "version": 2
          },
          "conditions": [
            {
              "id": "e0ad4f46-c682-48f6-b31d-b5ee666def27",
              "leftValue": "={{$json[\"message\"][\"document\"][\"file_size\"]}} ",
              "rightValue": 5000000,
              "operator": {
                "type": "number",
                "operation": "lt"
              }
            },
            {
              "id": "eee51b6a-b469-48be-9fa5-3a288b49c889",
              "leftValue": "={{$json[\"message\"]?.photo?.[2]?.file_size ?? 0}}",
              "rightValue": 5000000,
              "operator": {
                "type": "number",
                "operation": "lt"
              }
            }
          ],
          "combinator": "or"
        },
        "looseTypeValidation": true,
        "options": {}
      },
      "type": "n8n-nodes-base.if",
      "typeVersion": 2.2,
      "position": [
        -496,
        -16
      ],
      "id": "23235fce-da24-4371-973c-1cef7b526454",
      "name": "File Size"
    },
    {
      "parameters": {},
      "type": "n8n-nodes-base.merge",
      "typeVersion": 3.2,
      "position": [
        528,
        0
      ],
      "id": "67386a8c-3e91-4b85-b081-0ab315f6d166",
      "name": "Merge1"
    },
    {
      "parameters": {},
      "type": "n8n-nodes-base.merge",
      "typeVersion": 3.2,
      "position": [
        -256,
        -272
      ],
      "id": "935c8af5-1595-411b-a6b0-6bf89ff20221",
      "name": "Merge"
    },
    {
      "parameters": {
        "assignments": {
          "assignments": [
            {
              "id": "d2d00b5d-b58c-4c69-828f-f39359885b2d",
              "name": "chatId",
              "value": "={{ $json[\"message\"][\"chat\"][\"id\"].toString() }}",
              "type": "string"
            }
          ]
        },
        "options": {}
      },
      "type": "n8n-nodes-base.set",
      "typeVersion": 3.4,
      "position": [
        -704,
        224
      ],
      "id": "e76da736-ce55-4a7e-a386-1d5df0654767",
      "name": "chatId"
    }
  ],
  "connections": {
    "Server webhook": {
      "main": [
        [
          {
            "node": "Merge",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Process File Data": {
      "main": [
        [
          {
            "node": "user email",
            "type": "main",
            "index": 0
          },
          {
            "node": "Analyze with Gemini",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Analyze with Gemini": {
      "main": [
        [
          {
            "node": "Clean HTML",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Clean HTML": {
      "main": [
        [
          {
            "node": "PDFShift API",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "PDFShift API": {
      "main": [
        [
          {
            "node": "Merge2",
            "type": "main",
            "index": 1
          }
        ]
      ]
    },
    "user email": {
      "main": [
        [
          {
            "node": "If1",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Final Ouputs": {
      "main": [
        [
          {
            "node": "Send Email",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Telegram Trigger": {
      "main": [
        [
          {
            "node": "chatId",
            "type": "main",
            "index": 0
          },
          {
            "node": "File Size",
            "type": "main",
            "index": 0
          }
        ],
        []
      ]
    },
    "Send Back to Telegram": {
      "main": [
        []
      ]
    },
    "If": {
      "main": [
        [
          {
            "node": "Send Back to Telegram",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "Merge1",
            "type": "main",
            "index": 1
          }
        ]
      ]
    },
    "Merge2": {
      "main": [
        [
          {
            "node": "If",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "If1": {
      "main": [
        [
          {
            "node": "Merge1",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "File Size": {
      "main": [
        [
          {
            "node": "Merge",
            "type": "main",
            "index": 1
          }
        ],
        [
          {
            "node": "Send a text message",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Merge1": {
      "main": [
        [
          {
            "node": "Final Ouputs",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Merge": {
      "main": [
        [
          {
            "node": "Process File Data",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "chatId": {
      "main": [
        [
          {
            "node": "Merge2",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "meta": {
    "templateCredsSetupCompleted": true
  }
}