🤖 Slackbot avancé (n8n)

• •Token Bot Slack ou URL Webhook
• •Point de terminaison HTTP Webhook (généré automatiquement par n8n)
• •Informations de connexion à la base de données PostgreSQL
• •Peut nécessiter les informations d'identification d'authentification de l'API cible

{
  "nodes": [
    {
      "id": "8e0a3745-348b-42db-82cc-55676c897ad7",
      "name": "Démarrer un fil",
      "type": "n8n-nodes-base.slack",
      "position": [
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      ],
      "parameters": {
        "text": "=🧵 Got request to `{{ $json.command }}` from @{{$json.user}}",
        "select": "channel",
        "channelId": {
          "__rl": true,
          "mode": "name",
          "value": "={{ $json.alerts_channel }}"
        },
        "otherOptions": {
          "link_names": true
        }
      },
      "credentials": {
        "slackApi": {
          "id": "26",
          "name": "Cloudbot bot token"
        }
      },
      "typeVersion": 2
    },
    {
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      "name": "Envoyer de l'aide",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
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      ],
      "parameters": {
        "url": "={{ $json.response_url }}",
        "options": {},
        "requestMethod": "POST",
        "jsonParameters": true,
        "responseFormat": "string",
        "bodyParametersJson": "={\n\"attachments\": [\n{\n\"text\": \"ℹ️ <{{ $json.help_docs_url }}|You can find help page here>\"\n}\n]\n}"
      },
      "typeVersion": 1
    },
    {
      "id": "47c146f9-1223-46a7-bfd6-0fa6ff701efe",
      "name": "Valider le jeton Slack",
      "type": "n8n-nodes-base.if",
      "position": [
        320,
        280
      ],
      "parameters": {
        "conditions": {
          "string": [
            {
              "value1": "={{ $json.slack_token }}",
              "value2": "={{ $json.request_token }}"
            }
          ]
        }
      },
      "typeVersion": 1
    },
    {
      "id": "7733505c-d02c-4cb2-be78-f2272e5b7d6e",
      "name": "Note adhésive 3",
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      "position": [
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      ],
      "parameters": {
        "color": 5,
        "width": 549.1826144791862,
        "height": 326.46772464213774,
        "content": "## 👨‍🎤 Setup\n1. Add Slack command and point it up to the webhook\n2. Add the following to the **Set config** node\n- `alerts_channel` with alerts channel to start threads on\n- `instance_url` with this instance url to make it easy to debug\n- `slack_token` with slack bot token to validate request\n- `slack_secret_signature` with slack secret signature to validate request\n- `help_docs_url` with help url to help users understand the commands \n3. Build other workflows to call and add them to `commands` in **Set Config**. Each command must be mapped to a workflow id with an `Execute Workflow Trigger` node\n4. Activate workflow 🚀"
      },
      "typeVersion": 1
    },
    {
      "id": "30355072-5d75-4deb-af67-909ba59e6eb3",
      "name": "Répondre à l'utilisateur que la commande a été reçue",
      "type": "n8n-nodes-base.httpRequest",
      "onError": "continueRegularOutput",
      "position": [
        500,
        40
      ],
      "parameters": {
        "url": "={{ $json.response_url }}",
        "options": {},
        "requestMethod": "POST",
        "jsonParameters": true,
        "responseFormat": "string",
        "bodyParametersJson": "={\n\"attachments\": [\n{\n\"text\": \"ℹ️ Got command `{{ $json.command_name }} {{ $json.command_text }}`\"\n}\n]\n}"
      },
      "typeVersion": 1
    },
    {
      "id": "a2217c45-700e-4923-96e4-455a733bc1e4",
      "name": "si a un workflow",
      "type": "n8n-nodes-base.if",
      "position": [
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      ],
      "parameters": {
        "options": {},
        "conditions": {
          "options": {
            "leftValue": "",
            "caseSensitive": true,
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          },
          "combinator": "and",
          "conditions": [
            {
              "id": "d0a35e4f-3141-4e94-bb1a-fe7747a58dfc",
              "operator": {
                "type": "object",
                "operation": "notEmpty",
                "singleValue": true
              },
              "leftValue": "={{ $json.workflow }}",
              "rightValue": ""
            }
          ]
        }
      },
      "typeVersion": 2
    },
    {
      "id": "7ff12aa4-680f-42af-aa2f-c9dd6a733976",
      "name": "Définir la configuration",
      "type": "n8n-nodes-base.set",
      "position": [
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      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "ba8fd958-188a-4e27-bdf1-928de8ae7d4f",
              "name": "commands",
              "type": "object",
              "value": "={{\n{\n  \"info\": { workflowId: 142, startThread: false },\n  \"delete-user\": { workflowId: \"pTh9HMZVYcQNXypJ\" }\n}\n}}"
            },
            {
              "id": "105d2881-72b7-4547-a076-83ddb0966256",
              "name": "alerts_channel",
              "type": "string",
              "value": "#adore_bot_test"
            },
            {
              "id": "9672bea2-3a6a-4162-9966-107bf2ddbee5",
              "name": "instance_url",
              "type": "string",
              "value": "https://x.app.n8n.cloud/"
            },
            {
              "id": "52b53b37-5f69-4fb8-9569-f62788d91af1",
              "name": "slack_token",
              "type": "string",
              "value": "FILL_TOKEN_HERE"
            },
            {
              "id": "4d8d06f2-f1a5-4eb2-a559-42d98ceddffb",
              "name": "slack_secret_signature",
              "type": "string",
              "value": "FILL_SECRET_HERE"
            },
            {
              "id": "c2c7de20-a264-495e-934e-dda1a0bc64b9",
              "name": "help_docs_url",
              "type": "string",
              "value": "ADD_LINK_HERE"
            }
          ]
        },
        "includeOtherFields": true
      },
      "typeVersion": 3.3
    },
    {
      "id": "4c730be9-d3f5-45ee-8f2b-b6bfd685ea78",
      "name": "Envoyer l'URL de débogage",
      "type": "n8n-nodes-base.httpRequest",
      "onError": "continueRegularOutput",
      "position": [
        1260,
        440
      ],
      "parameters": {
        "url": "={{ $json.response_url }}",
        "options": {},
        "requestMethod": "POST",
        "jsonParameters": true,
        "responseFormat": "string",
        "bodyParametersJson": "={\n\"attachments\": [\n{\n\"text\": \"<{{ $json.instance_url }}/workflow/{{ $workflow.id }}/executions/{{ $execution.id }}|To debug entry point execution>\"\n}\n]\n}"
      },
      "retryOnFail": false,
      "typeVersion": 2
    },
    {
      "id": "f4ccc237-d703-4963-8112-cc38ae9d6b2a",
      "name": "si créer un fil",
      "type": "n8n-nodes-base.if",
      "position": [
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      ],
      "parameters": {
        "options": {},
        "conditions": {
          "options": {
            "leftValue": "",
            "caseSensitive": true,
            "typeValidation": "strict"
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          "combinator": "or",
          "conditions": [
            {
              "id": "7eadbf0d-f8ec-45cf-abf3-aafb8d7e16b4",
              "operator": {
                "type": "boolean",
                "operation": "true",
                "singleValue": true
              },
              "leftValue": "={{ $json.workflow.startThread }}",
              "rightValue": ""
            },
            {
              "id": "2f28e7dd-6473-4f85-a449-674e00b29b4d",
              "operator": {
                "type": "boolean",
                "operation": "notExists",
                "singleValue": true
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              "leftValue": "={{ $json.workflow.startThread }}",
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          ]
        }
      },
      "typeVersion": 2
    },
    {
      "id": "ed9f2ed8-5266-42a3-9d47-621050e5bf97",
      "name": "Alerter l'utilisateur que le fil a été créé",
      "type": "n8n-nodes-base.httpRequest",
      "onError": "continueRegularOutput",
      "position": [
        1260,
        0
      ],
      "parameters": {
        "url": "={{ $json.response_url }}",
        "options": {},
        "requestMethod": "POST",
        "jsonParameters": true,
        "responseFormat": "string",
        "bodyParametersJson": "={\n\"attachments\": [\n{\n\"text\": \"🧵 Thread created on {{ $json.alerts_channel }}\"\n}\n]\n}"
      },
      "retryOnFail": false,
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    },
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      "name": "Ajouter des informations de débogage",
      "type": "n8n-nodes-base.slack",
      "position": [
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        60
      ],
      "parameters": {
        "text": "=<{{ $vars.instance_url }}/workflow/{{ $workflow.id }}/executions/{{ $execution.id }}|To debug entry point execution>",
        "select": "channel",
        "channelId": {
          "__rl": true,
          "mode": "id",
          "value": "={{ $json.channel }}"
        },
        "otherOptions": {
          "thread_ts": {
            "replyValues": {
              "thread_ts": "={{ $json.message.ts }}"
            }
          }
        }
      },
      "credentials": {
        "slackApi": {
          "id": "26",
          "name": "Cloudbot bot token"
        }
      },
      "typeVersion": 2
    },
    {
      "id": "6b385f75-4ebf-46c8-a799-babdb6231f4e",
      "name": "Exécuter le workflow cible",
      "type": "n8n-nodes-base.executeWorkflow",
      "position": [
        1940,
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      ],
      "parameters": {
        "options": {},
        "workflowId": "={{ $json.commands.info.workflowId }}"
      },
      "typeVersion": 1
    },
    {
      "id": "5fde8d57-6ef3-4b01-9422-16fd2f176c5d",
      "name": "Ajouter les informations du fil",
      "type": "n8n-nodes-base.merge",
      "position": [
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      ],
      "parameters": {
        "mode": "combine",
        "options": {},
        "combinationMode": "multiplex"
      },
      "typeVersion": 2
    },
    {
      "id": "c4892e34-53af-4d95-a3b6-ca16fdef1aa7",
      "name": "Gérer les autres commandes",
      "type": "n8n-nodes-base.switch",
      "position": [
        640,
        620
      ],
      "parameters": {
        "rules": {
          "values": [
            {
              "outputKey": "help",
              "conditions": {
                "options": {
                  "leftValue": "",
                  "caseSensitive": true,
                  "typeValidation": "strict"
                },
                "combinator": "and",
                "conditions": [
                  {
                    "operator": {
                      "type": "string",
                      "operation": "equals"
                    },
                    "leftValue": "={{ $json.command }}",
                    "rightValue": "help"
                  }
                ]
              },
              "renameOutput": true
            }
          ]
        },
        "options": {
          "fallbackOutput": "extra"
        }
      },
      "typeVersion": 3
    },
    {
      "id": "7dabe06a-8d87-4e68-b8d9-53bf7f29a9ab",
      "name": "Définir les informations du fil",
      "type": "n8n-nodes-base.set",
      "position": [
        1540,
        240
      ],
      "parameters": {
        "values": {
          "string": [
            {
              "name": "channel_id",
              "value": "={{ $json.channel }}"
            },
            {
              "name": "thread_ts",
              "value": "={{ $json.message.ts }}"
            }
          ]
        },
        "options": {},
        "keepOnlySet": true
      },
      "typeVersion": 1
    },
    {
      "id": "e56875c4-ce2b-4639-aabc-21f1562a3858",
      "name": "Commande inconnue",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
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      ],
      "parameters": {
        "url": "={{ $json.response_url }}",
        "options": {},
        "requestMethod": "POST",
        "jsonParameters": true,
        "responseFormat": "string",
        "bodyParametersJson": "={\n\"attachments\": [\n{\n\"text\": \"🤷🏽‍♂️ Sorry, unknown command `{{ $json.command }}`\"\n}\n]\n}"
      },
      "typeVersion": 1
    },
    {
      "id": "3fab88ce-4a80-483b-b558-12e111f16c98",
      "name": "Définir les variables",
      "type": "n8n-nodes-base.set",
      "position": [
        -280,
        280
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "8fa0d712-1076-49b7-82da-e98390182ac6",
              "name": "command_text",
              "type": "string",
              "value": "={{ $json.body.text }}"
            },
            {
              "id": "ef82aa1f-2882-4970-b10a-86e7faef6562",
              "name": "user",
              "type": "string",
              "value": "={{ $json.body.user_name }}"
            },
            {
              "id": "633fe37e-850c-4e95-8728-f19ceb4afe76",
              "name": "response_url",
              "type": "string",
              "value": "={{ $json.body.response_url }}"
            },
            {
              "id": "bbab2bb9-3e90-41c4-b5be-8c7873c61707",
              "name": "request_token",
              "type": "string",
              "value": "={{ $json.body.token }}"
            },
            {
              "id": "3e6dd0e2-fec4-48cb-a44c-1342a8eb619c",
              "name": "command_name",
              "type": "string",
              "value": "={{ $json.body.command }}"
            }
          ]
        }
      },
      "typeVersion": 3.3
    },
    {
      "id": "99cab485-4099-4505-9c9e-33ea389818e5",
      "name": "Webhook à appeler pour la commande Slack",
      "type": "n8n-nodes-base.webhook",
      "position": [
        -480,
        280
      ],
      "webhookId": "a14585bb-b757-410e-a5b2-5f05a087b388",
      "parameters": {
        "path": "a14585bb-b757-410e-a5b2-5f05a087b388",
        "options": {
          "rawBody": true,
          "responseData": "Wait for it...",
          "binaryPropertyName": "data"
        },
        "httpMethod": "POST"
      },
      "typeVersion": 1.1
    },
    {
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      "name": "Répondre directement à l'utilisateur",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        1460,
        900
      ],
      "parameters": {
        "url": "={{ $json.response_url }}",
        "options": {},
        "requestMethod": "POST",
        "jsonParameters": true,
        "responseFormat": "string",
        "bodyParametersJson": "={\n\"attachments\": [\n{\n\"text\": \"<{{ $json.instance_url }}workflow/{{ $workflow.id }}/executions/{{ $execution.id }}|To debug subworkflow execution>\"\n}\n]\n}"
      },
      "typeVersion": 2,
      "continueOnFail": true
    },
    {
      "id": "a38b3343-8e8e-4d6c-95ef-66efafdfa913",
      "name": "Note adhésive",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
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      ],
      "parameters": {
        "width": 1255.4495374151727,
        "height": 655.2393233866135,
        "content": "## Example subworkflow for command WITHOUT Slack thread..\n\n### Build this in a separate workflow\n### and add the id to `commands` in **Set Config**"
      },
      "typeVersion": 1
    },
    {
      "id": "87f764b3-135c-4dc3-8633-b58e2c3a4e2d",
      "name": "Déclencheur de commande workflow",
      "type": "n8n-nodes-base.executeWorkflowTrigger",
      "disabled": true,
      "position": [
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        1020
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "3a52d7e3-ef56-47db-844a-1efb6c20ad35",
      "name": "si a un indicateur",
      "type": "n8n-nodes-base.if",
      "position": [
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      ],
      "parameters": {
        "options": {},
        "conditions": {
          "options": {
            "leftValue": "",
            "caseSensitive": true,
            "typeValidation": "strict"
          },
          "combinator": "and",
          "conditions": [
            {
              "id": "d8478e87-6e7c-40ea-a28d-099a3896001b",
              "operator": {
                "type": "array",
                "operation": "contains",
                "rightType": "any"
              },
              "leftValue": "={{ $json.flags }}",
              "rightValue": "--full-info"
            }
          ]
        }
      },
      "typeVersion": 2
    },
    {
      "id": "78718555-e266-4f58-ab9d-6e78f50afac2",
      "name": "Si correspond à une variable d'environnement",
      "type": "n8n-nodes-base.if",
      "position": [
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        1120
      ],
      "parameters": {
        "options": {},
        "conditions": {
          "options": {
            "leftValue": "",
            "caseSensitive": true,
            "typeValidation": "strict"
          },
          "combinator": "and",
          "conditions": [
            {
              "id": "1ccb9f5d-0e7d-44f9-86e3-d5c0e15cb648",
              "operator": {
                "name": "filter.operator.equals",
                "type": "string",
                "operation": "equals"
              },
              "leftValue": "={{ $json.env.env }}",
              "rightValue": "prod"
            }
          ]
        }
      },
      "typeVersion": 2
    },
    {
      "id": "0ca15a51-2e56-4ef4-8be6-96f45ed17867",
      "name": "Utilisateur trouvé",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        2220,
        1120
      ],
      "parameters": {
        "url": "={{ $('Command workflow trigger').item.json.response_url }}",
        "options": {},
        "requestMethod": "POST",
        "jsonParameters": true,
        "responseFormat": "string",
        "bodyParametersJson": "={{ $json.slack_message }}"
      },
      "typeVersion": 2,
      "continueOnFail": true
    },
    {
      "id": "ad83305f-9ca5-428f-a731-9afe3a82258a",
      "name": "Formatter les données en une structure claire",
      "type": "n8n-nodes-base.code",
      "position": [
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        1120
      ],
      "parameters": {
        "jsCode": "const user = {\n  id: '1',\n  email: 'mutasem@n8n.io',\n  name: 'Mutasem Aldmour',\n  username: 'mutasem',\n  profile_url: 'https://n8n.io/creators/mutasem/',\n}\n\nconst fields = [\n    `*id:*\\n${user.id}`,\n    `*email:*\\n${user.email}`,\n    `*name:*\\n${user.name}`,\n    `*urls:*\\n<${user.profile_url}|creator profile>`\n];\n\n// remember no more than 10 fields per section\nconst output = {\n    \"blocks\":\n    [\n        {\n            \"type\": \"section\",\n            \"text\":\n            {\n                \"type\": \"mrkdwn\",\n                \"text\": `User: *${user.username}*`\n            }\n        },\n        {\n            \"type\": \"section\",\n            \"fields\": fields.map((text) => {\n                    return {\n                        \"type\": \"mrkdwn\",\n                        text,\n                    };\n                })\n        }\n    ]\n}\n\nreturn { slack_message: output };"
      },
      "typeVersion": 1
    },
    {
      "id": "6bdbd120-68ac-46ad-bd34-c43d7a447be4",
      "name": "REMPlACEZ-MOI PAR UN DÉCLENCHEUR",
      "type": "n8n-nodes-base.set",
      "position": [
        1240,
        1680
      ],
      "parameters": {
        "options": {}
      },
      "typeVersion": 3.3
    },
    {
      "id": "e2b0b88d-be4a-4b66-be15-3e8c6052d0f7",
      "name": "Supprimer l'utilisateur ici par exemple",
      "type": "n8n-nodes-base.postgres",
      "disabled": true,
      "position": [
        1500,
        1800
      ],
      "parameters": {
        "table": {
          "__rl": true,
          "mode": "name",
          "value": "=user"
        },
        "where": {
          "values": [
            {
              "value": "={{ $json.params[0] }}",
              "column": "username"
            }
          ]
        },
        "schema": {
          "__rl": true,
          "mode": "list",
          "value": "public"
        },
        "options": {},
        "operation": "deleteTable",
        "deleteCommand": "delete"
      },
      "typeVersion": 2.3
    },
    {
      "id": "b0dc9a07-4957-4643-972b-49952d6fc001",
      "name": "Obtenir l'utilisateur ici par exemple",
      "type": "n8n-nodes-base.postgres",
      "disabled": true,
      "position": [
        1840,
        1120
      ],
      "parameters": {
        "table": {
          "__rl": true,
          "mode": "name",
          "value": "test"
        },
        "where": {
          "values": [
            {
              "value": "={{ $json.params[0] }}",
              "column": "username"
            }
          ]
        },
        "schema": {
          "__rl": true,
          "mode": "list",
          "value": "public"
        },
        "options": {},
        "operation": "select"
      },
      "typeVersion": 2.3
    },
    {
      "id": "1f2eff56-a89b-4d6d-af8b-477c81c8bab3",
      "name": "Confirmer que l'utilisateur a été supprimé",
      "type": "n8n-nodes-base.slack",
      "position": [
        1720,
        1800
      ],
      "parameters": {
        "text": "Deleted user  ✅",
        "select": "channel",
        "channelId": {
          "__rl": true,
          "mode": "id",
          "value": "={{ $('Command workflow trigger').item.json.channel_id }}"
        },
        "otherOptions": {
          "thread_ts": {
            "replyValues": {
              "thread_ts": "={{ $('Command workflow trigger').item.json.thread_ts }}"
            }
          }
        }
      },
      "credentials": {
        "slackApi": {
          "id": "26",
          "name": "Cloudbot bot token"
        }
      },
      "typeVersion": 2
    },
    {
      "id": "0c0d0487-a594-4e88-b777-21b4816115cd",
      "name": "Répondre dans le fil",
      "type": "n8n-nodes-base.slack",
      "position": [
        1500,
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      ],
      "parameters": {
        "text": "=<{{ $json.instance_url }}workflow/{{ $workflow.id }}/executions/{{ $execution.id }}|To debug subworkflow execution>",
        "select": "channel",
        "channelId": {
          "__rl": true,
          "mode": "id",
          "value": "={{ $json.channel_id }}"
        },
        "otherOptions": {
          "thread_ts": {
            "replyValues": {
              "thread_ts": "={{ $json.thread_ts }}"
            }
          }
        }
      },
      "credentials": {
        "slackApi": {
          "id": "26",
          "name": "Cloudbot bot token"
        }
      },
      "typeVersion": 2
    },
    {
      "id": "2c055ef4-4c0a-475d-b521-30002a45950b",
      "name": "Note adhésive 2",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        1160,
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      "parameters": {
        "width": 961.7738517807816,
        "height": 589.0078772779973,
        "content": "## Example subworkflow for command WITH Slack thread..\n\n### Build this in a second separate workflow\n### and add the id to `commands` in **Set Config**\n\nUsed Edit Fields node here as trigger because you can only have one\nExecute Workflow Trigger per workflow"
      },
      "typeVersion": 1
    },
    {
      "id": "aec1b842-1219-4367-9238-3c7a118ce68f",
      "name": "Note adhésive 1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -80,
        460
      ],
      "parameters": {
        "color": 7,
        "width": 150,
        "height": 83.26656725254155,
        "content": "### 👆🏽 Set all custom config here "
      },
      "typeVersion": 1
    },
    {
      "id": "dd8f1a00-dfd4-4966-a76c-3c8e2a243bab",
      "name": "Analyser la commande",
      "type": "n8n-nodes-base.code",
      "position": [
        560,
        280
      ],
      "parameters": {
        "jsCode": "const text = $input.first().json.command_text;\nconst parts = text.split(' ');\n\n\n// GET COMMAND\n// for example /cloudbot info mutasem\n// should return \"info\"\nconst command = parts[0];\n\n\n// GET FLAGS \n// for example /cloudbot info mutasem --test --flag\n// should return ['--test', '--flag']\nconst flags = parts.filter((part) => part.startsWith('--'));\n\n\n// GET PARAMS\n// for example /cloudbot info mutasem test\n// should return [\"mutasem\", \"test\"]\nlet params = parts\n  .filter((part, i) => i > 0 && !part.startsWith('--'));\nparams = params.filter((param, i) => {\n  if (param === '-e') {\n    return false;\n  }\n  if (params[i - 1] === '-e') {\n    return false;\n  }\n\n  return true;\n});\n\n\n// GET ENV VARS\n// for example /cloudbot info mutasem -e env=prod\n// should return {env: \"prod\"}\nconst env = parts.filter((val, i) => {\n  return i > 0 && parts[i - 1] === '-e';\n})\n  .reduce((accu, opt) => {\n  if (!opt.includes('=')) {\n    return accu;\n  }\n\n  const key = opt.split('=')[0];\n  const val = opt.split('=')[1];\n  \n  accu[key] = clean(val);\n  return accu;\n}, {});\n\n// Add workflow to run\nconst commands = $input.first().json.commands;\nlet workflow;\nif (commands[command]) {\n  workflow = commands[command];\n}\n\nreturn {\n  ...$input.first().json,\n  command,\n  flags,\n  env,\n  params,\n  workflow,\n}\n\nfunction clean(str) {\n  return str.replaceAll(`‘`, '\\'').replaceAll('“', '\"').replaceAll('”', '\"').replaceAll('’', '\\'');\n}"
      },
      "typeVersion": 1
    },
    {
      "id": "22b8502c-dec3-4456-9947-639761517881",
      "name": "Valider la signature webhook",
      "type": "n8n-nodes-base.code",
      "position": [
        100,
        280
      ],
      "parameters": {
        "jsCode": "const SIGNING_SECRET = $input.first().json.slack_secret_signature;\nconst item = $('Webhook to call for Slack command').first();\n\nif (!item.binary) {\n  throw new Error('Missing binary data');\n}\n\nconst crypto = require('crypto');\nconst { binary: { data } } = item;\n\nif (\n  !item.json.headers['x-slack-request-timestamp'] ||\n  Math.abs(\n    Math.floor(new Date().getTime() / 1000) -\n      +item.json.headers['x-slack-request-timestamp']\n  ) > 300\n) {\n  throw new Error('Unauthorized, request not fresh');\n}\n\nconst rawBody = Buffer.from(data.data, 'base64').toString()\n\n// compute the basestring\nconst baseStr = `v0:${item.json.headers['x-slack-request-timestamp']}:${rawBody}`;\n\n// extract the received signature from the request headers\nconst receivedSignature = item.json.headers['x-slack-signature'];\n\nconst expectedSignature = `v0=${crypto.createHmac('sha256', SIGNING_SECRET)\n.update(baseStr, 'utf8')\n.digest('hex')}`;\n\n// match the two signatures\nif (expectedSignature !== receivedSignature) {\nthrow new Error('Unauthorized, umatched signatures');\n}\n\nreturn $input.all();"
      },
      "typeVersion": 2
    }
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