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

# HacksMessageBuilder

> API reference for the HacksMessageBuilder interface used to customize notification messages for Skill Exchange Hack project posts.

## HacksMessageBuilder

`@spotify/backstage-plugin-skill-exchange-node/alpha` > `HacksMessageBuilder`

The `HacksMessageBuilder` interface defines the contract for building messages used for Skill Exchange Hack notifications.

### Interface

| Method                                         | Description                                                                                                           | Parameters      | Type                                               | Parameter Description                              |
| ---------------------------------------------- | --------------------------------------------------------------------------------------------------------------------- | --------------- | -------------------------------------------------- | -------------------------------------------------- |
| `buildInquiryMessage`                          | Builds a message to be sent to the post owner that someone expressed interest in their post                           | `postUrl`       | string                                             | URL of the post                                    |
|                                                |                                                                                                                       | `postTitle`     | string                                             | Title of the post                                  |
|                                                |                                                                                                                       | `sender`        | string                                             | Name or user ID of the person expressing interest  |
|                                                |                                                                                                                       | `customMessage` | string (optional)                                  | Custom message from the sender                     |
| `buildInquiryConfirmationMessage`              | Builds a confirmation message to be sent to the sender that their interest in the post was sent to the contact person | `postUrl`       | string                                             | URL of the post                                    |
|                                                |                                                                                                                       | `postTitle`     | string                                             | Title of the post                                  |
|                                                |                                                                                                                       | `postContact`   | string                                             | Name or user ID of the post contact                |
| `buildInquiryReminderMessage`                  | Builds a message to remind a post owner about an inquiry they received                                                | `postUrl`       | string                                             | URL of the post                                    |
|                                                |                                                                                                                       | `postTitle`     | string                                             | Title of the post                                  |
|                                                |                                                                                                                       | `sender`        | string                                             | Name or user ID of the person who sent the inquiry |
|                                                |                                                                                                                       | `duration`      | string                                             | Time duration since the inquiry was sent           |
| `buildStopInquiryRemindersConfirmationMessage` | Builds a confirmation message that reminders about an inquiry have been stopped                                       |                 |                                                    | No parameters                                      |
| `buildErrorOnActionMessage`                    | Builds a message to notify user that an error occurred when trying to perform an action                               |                 |                                                    | No parameters                                      |
| `buildParticipantAddedMessage`                 | Builds a message to notify a user that they were added as a participant to a post                                     | `postUrl`       | string                                             | URL of the post                                    |
|                                                |                                                                                                                       | `postTitle`     | string                                             | Title of the post                                  |
|                                                |                                                                                                                       | `postContact`   | string                                             | Name or user ID of the post contact                |
| `buildParticipantAddedConfirmationMessage`     | Builds a confirmation message to notify the post contact that a user was successfully added as a participant          | `participant`   | string                                             | Name or user ID of the participant who was added   |
| `buildSavedSearchMatchMessage`                 | Builds a message to notify a user that a new post matches their saved search criteria                                 | `postUrl`       | string                                             | URL of the matching post                           |
|                                                |                                                                                                                       | `postTitle`     | string                                             | Title of the matching post                         |
| `buildHackDigestMessage`                       | Builds a message that summarizes updates of posts that a user is following                                            | `args`          | [HackDigestMessageArgs](#hackdigestmessageargs)\[] | Array of post update information                   |

### Types

#### HackDigestMessageArgs

| Property      | Type     | Description            |
| ------------- | -------- | ---------------------- |
| `postUrl`     | `string` | URL of the post        |
| `postTitle`   | `string` | Title of the post      |
| `newComments` | `number` | Number of new comments |
| `newUpdates`  | `number` | Number of new updates  |