Closes 41: 3.19 preconnect to external domains beacon processing part

[jeawhanlee]

Description

Closes wp-media/wp-rocket#7247

Collates all the external domains on a page.

Type of change

• New feature (non-breaking change which adds functionality).

Detailed scenario

N/A

Technical description

Documentation

The BeaconPreconnectExternalDomain class is designed to identify and manage external domains referenced in specific HTML elements (like <script>, , etc.) based on a configuration that specifies which elements to consider and which patterns to exclude. It processes these elements to determine if they belong to external domains, logs matched and excluded items, and provides methods to retrieve the results of the matching process. The class utilizes URL parsing and pattern matching to filter out unwanted domains and attributes, ensuring that only relevant external domains are captured.

New dependencies

N/A

Risks

N/A

Mandatory Checklist

Code validation

• I validated all the Acceptance Criteria. If possible, provide screenshots or videos.
• I triggered all changed lines of code at least once without new errors/warnings/notices.
• I implemented built-in tests to cover the new/changed code.

Code style

• I wrote a self-explanatory code about what it does.
• I protected entry points against unexpected inputs.
• I did not introduce unnecessary complexity.
• Output messages (errors, notices, logs) are explicit enough for users to understand the issue and are actionnable.

Unticked items justification

If some mandatory items are not relevant, explain why in this section.

Additional Checks

• In the case of complex code, I wrote comments to explain it.
• When possible, I prepared ways to observe the implemented system (logs, data, etc.).
• I added error handling logic when using functions that could throw errors (HTTP/API request, filesystem, etc.)

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
Report missing for f1737f01	✅ 96.53% (target: 50.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (f1737f0)	Report Missing	Report Missing	Report Missing
Head commit (4ca2cbc)	1377	1052	76.40%

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#43)	173	167	96.53%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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Footnotes

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