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54 lines
2.0 KiB
Markdown
54 lines
2.0 KiB
Markdown
---
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next: docs/github-api.md
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---
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# Receiving Webhooks
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[GitHub webhooks](https://developer.github.com/webhooks/) are fired for almost every significant action that users take on GitHub, whether it's pushes to code, opening or closing issues, opening or merging pull requests, or commenting on a discussion.
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Many robots will spend their entire day responding to these actions. `robot.on` will listen for any GitHub webhook events:
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```js
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module.exports = robot => {
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robot.on('push', async context => {
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// Code was pushed to the repo, what should we do with it?
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robot.log(context)
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})
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}
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```
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The robot can listen to any of the [GitHub webhook events](https://developer.github.com/webhooks/#events). The `context` object includes everything about the event that was triggered, and `context.payload` has the payload delivered by GitHub.
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Most events also include an "action". For example, the [`issues`](https://developer.github.com/v3/activity/events/types/#issuesevent) event has actions of `assigned`, `unassigned`, `labeled`, `unlabeled`, `opened`, `edited`, `milestoned`, `demilestoned`, `closed`, and `reopened`. Often, your bot will only care about one type of action, so you can append it to the event name with a `.`:
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```js
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module.exports = robot => {
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robot.on('issues.opened', async context => {
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// An issue was just opened.
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})
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}
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```
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Sometimes you want to handle multiple webhook events the same way. `robot.on` can listen to a list of events and run the same callback:
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```js
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module.exports = robot => {
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robot.on(['issues.opened', 'issues.edited'], async context => {
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// An issue was opened or edited, what should we do with it?
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robot.log(context)
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})
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}
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```
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You can also use the wildcard event (`*`) to listen for any event that your app is subscribed to:
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```js
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module.exports = robot => {
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robot.on(`*`, async context => {
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context.log({event: context.event, action: context.payload.action})
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})
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}
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```
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Explore the [GitHub webhook documentation](https://developer.github.com/webhooks/#events) to see what events are available to use in your app.
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