feat(Surveys): Activate surveys based on actions

[Phanatic]

Broken out of #1292 into its own PR for easier reviewing and merging

This PR allows us to activate surveys if any actions they're configured with are performed in the browser.

Changes

Survey Event Receiver

1. Instead of maintaining a map of Survey-ID to its actions or events, we maintain a map of Action/Event to the surveys that are activated by it.
2. We now look for, and register any surveys that are activated by events with the ActionMatcher.
3. Changed on to be onEvent and added a new onAction event handler.
4. onAction listens on the actionCaptured event in ActionMatcher described below.

Flowchart for activating surveys based on actions.

flowchart TD
    A[User clicks button] -->|AutoCapture| B(Analyze element)
    B --> |Element matches known selector|C(Set $element_selectors property)
    C -->D[Capture Action]
    B --> |Element does not match known selector|D[Capture Action]
    D --> |Raise eventCaptured with CaptureResult|E[Event Handlers]
    E --> F[Action Matcher]
    F --> |Check Action Step Matches CaptureResult|G[Raise actionCaptured with actionName]
    G --> H[Survey Event Receiver onAction]
    H --> I[Match action name to surveys activated by it]
    I --> |actionName matches a survey's actions|J[Add survey to activatedSurveys]

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Checklist

• Tests for new code (see advice on the tests we use)
• Accounted for the impact of any changes across different browsers
• Accounted for backwards compatibility of any changes (no breaking changes in posthog-js!)

[vercel]

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Name	Status	Preview	Updated (UTC)
posthog-js	🛑 Canceled (Inspect)		Jul 9, 2024 4:39pm

[github-actions]

Size Change: +24.4 kB (+2.12%)

Total Size: 1.17 MB

Filename	Size	Change
dist/array.full.js	323 kB	+6.09 kB (+1.92%)
dist/array.js	161 kB	+6.09 kB (+3.94%)
dist/main.js	161 kB	+6.09 kB (+3.92%)
dist/module.js	161 kB	+6.09 kB (+3.94%)

ℹ️ View Unchanged

Filename	Size
dist/exception-autocapture.js	10.4 kB
dist/recorder-v2.js	110 kB
dist/recorder.js	110 kB
dist/surveys-preview.js	59.6 kB
dist/surveys.js	64.7 kB
dist/tracing-headers.js	8.26 kB
dist/web-vitals.js	5.79 kB

_{compressed-size-action}

[jurajmajerik]

🚢