> ## Documentation Index
> Fetch the complete documentation index at: https://doc.lucidworks.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Send Slack Message Index Stage

export const schema = {
  "type": "object",
  "title": "Send Slack Message",
  "description": "Send a Slack Message using the Fusion Messaging Service.  This can be used for things like alerting and more.",
  "required": ["to", "from", "messageBodyTemplate", "messageSubjectTemplate"],
  "properties": {
    "skip": {
      "type": "boolean",
      "title": "Skip This Stage",
      "description": "Set to true to skip this stage.",
      "default": false,
      "hints": ["advanced"]
    },
    "label": {
      "type": "string",
      "title": "Label",
      "description": "A unique label for this stage.",
      "hints": ["advanced"],
      "maxLength": 255
    },
    "condition": {
      "type": "string",
      "title": "Condition",
      "description": "Define a conditional script that must result in true or false. This can be used to determine if the stage should process or not.",
      "hints": ["code", "code/javascript", "advanced"]
    },
    "storeInContext": {
      "type": "boolean",
      "title": "Add to Pipeline Context",
      "description": "Put the generated Message later in the pipeline.",
      "default": false,
      "hints": ["advanced"]
    },
    "responseKey": {
      "type": "string",
      "title": "Message Response Context Key",
      "description": "The name of the key to store the MessageResponse under in the Pipeline Context.",
      "default": "messageResponse",
      "hints": ["advanced"]
    },
    "errorKey": {
      "type": "string",
      "title": "Message Response Failure Key",
      "description": "The name of the key to store a boolean if sending a message failed.  If set, you can check the MessageResponse errorCode and other attributes for the reason.",
      "default": "messageResponseFailure",
      "hints": ["advanced"]
    },
    "to": {
      "type": "array",
      "title": "To",
      "description": "Who to send the message to.  May be a string template similar to the body and subject. ",
      "items": {
        "type": "string"
      }
    },
    "from": {
      "type": "string",
      "title": "From",
      "description": "Who the message is from.  May be a string template similar to the body and subject. "
    },
    "messageBodyTemplate": {
      "type": "string",
      "title": "Message Body Template",
      "description": "A Message Template that is used to create the message body to send.  See https://github.com/antlr/stringtemplate4/blob/master/doc/index.md for details on the template language.",
      "default": "Processing Document <doc.id>",
      "hints": ["lengthy", "code"]
    },
    "messageSubjectTemplate": {
      "type": "string",
      "title": "Message Subject Template",
      "description": "A Message Template that is used to create the message subject to send.  See https://github.com/antlr/stringtemplate4/blob/master/doc/index.md for details on the template language.",
      "default": "Hello"
    }
  },
  "category": "Troubleshooting",
  "categoryPriority": 3,
  "unsafe": false
};

export const SchemaParamFields = ({schema}) => {
  const sanitize = str => {
    if (typeof str !== "string") return str;
    return str.replace(/^"(.*)"$/s, "$1").replace(/\\/g, "").replace(/"/g, "'");
  };
  const formatDescription = str => {
    const s = sanitize(str);
    return (/[.!?]\)*$/).test(s) ? s : `${s}.`;
  };
  const {description, properties = {}, required: requiredProps = []} = schema;
  const visibleProps = useMemo(() => Object.entries(properties).filter(([, prop]) => !prop.hints?.includes("hidden")), [properties]);
  return <div>
      {description && <p>{formatDescription(description)}</p>}

      {visibleProps.map(([name, prop]) => {
    const isRequired = requiredProps.includes(name);
    const hasDefault = prop.default !== undefined;
    const rawDefault = prop.default;
    const isComplexDefault = hasDefault && (typeof rawDefault === "object" || typeof rawDefault === "string" && (rawDefault.length > 20 || rawDefault.includes('"')));
    const fieldProps = {
      key: name,
      body: prop.title || name,
      type: prop.type,
      ...prop.title && ({
        post: [<><span className="text-stone-400 dark:text-stone-500">API property: </span>{name}</>]
      }),
      ...isRequired && ({
        required: true
      }),
      ...!isComplexDefault && hasDefault ? {
        default: sanitize(String(rawDefault))
      } : {}
    };
    const isObject = prop.type === "object" && prop.properties;
    const isArrayOfObjects = prop.type === "array" && prop.items?.type === "object" && prop.items.properties;
    return <ParamField {...fieldProps}>
            {prop.description && <p>{formatDescription(prop.description)}</p>}

            {isComplexDefault && <div className="flex">
                <p>
                  <strong>Default:</strong>
                </p>
                <pre className="!my-0">
                  <code>
                    {JSON.stringify(rawDefault, null, 2)}
                  </code>
                </pre>
              </div>}

            {isArrayOfObjects && <div className="flex">
              <p>
                <strong>Object attributes:</strong>
              </p>
              <pre className="!my-0">
                <code>
                  {'{\n'}
                  {Object.entries(prop.items.properties).map(([iname, iprop]) => <>
                      {`  ${iname}`}
                      {prop.items?.required?.includes(iname) && <span style={{
      color: 'red'
    }}> required</span>}
                      {`: {\n    display name: ${sanitize(iprop.title || '')}\n    type: ${iprop.type}\n  }\n`}
                    </>)}
                  {'}'}
                </code>
              </pre>
              </div>}

            {isObject && <Expandable title="properties">
                <SchemaParamFields schema={{
      properties: prop.properties,
      required: prop.required
    }} />
              </Expandable>}
          </ParamField>;
  })}
    </div>;
};

export const LwTemplate = ({title = "Key questions to get you started", icon = "sparkles", cta = "Powered by Agent Studio", linkHref = "https://lucidworks.com/demo/?utm_source=docs&utm_medium=referral&utm_campaign=docs_cta_ai"}) => {
  const [isLoaded, setIsLoaded] = useState(false);
  useEffect(() => {
    const timer = setTimeout(() => {
      setIsLoaded(true);
    }, 500);
    return () => clearTimeout(timer);
  }, []);
  return <div className="lw-template-container">
      <Card title={title} icon={icon}>
        {isLoaded && <span dangerouslySetInnerHTML={{
    __html: `<lw-template id="a029c1a9-28be-427e-b0e1-5d918920246a"></lw-template
            >`
  }} />}
        <Link href={linkHref} className="agent-studio-link text-left text-gray-600 gap-2 dark:text-gray-400 text-sm font-medium flex flex-row items-center hover:text-primary dark:hover:text-primary-light group-hover:text-primary group-hover:dark:text-primary-light">Powered by Lucidworks Agent Studio</Link>
      </Card>
    </div>;
};

[localhost link]: http://localhost:3000/docs/4/fusion-server/reference/pipeline-stages/indexing/slack-index-stage

[mintlify link]: https://doc.lucidworks.com/docs/4/fusion-server/reference/pipeline-stages/indexing/slack-index-stage

[old doc.lw link]: https://doc.lucidworks.com/fusion-server/4.2/237

This stage sends a [Slack](https://slack.com/) message from Fusion, for alerting, reporting, and more, using Fusion’s [Messaging Services](/docs/4/fusion-server/concepts/system/monitoring/messaging-services).

<LwTemplate />

## Enabling Slack Messaging

Before you can use the Slack pipeline stage, you must enable Slack messaging in Fusion:

1. Click **Applications > System > Messaging Services**.
2. Select **Slack Message Service** from the drop-down menu.
3. Enter the following information:

   * [Slack auth token](https://api.slack.com/docs/oauth)
   * Message template

     The default is `<subject> : <body>`, which are configured with `messageSubjectTemplate` and `messageBodyTemplate` below. See
     [Messaging Services Templates](/docs/4/fusion-server/reference/template-expressions/messaging-service-variables) for details on the template language.
   * Optionally, you can configure a proxy or the error reporting channel name.
4. Click **Save message service**.

## Configuration

<Tip>
  When entering configuration values in the UI, use *unescaped* characters, such as `\t` for the tab character. When entering configuration values in the API, use *escaped* characters, such as `\\t` for the tab character.
</Tip>

<SchemaParamFields schema={schema} />