Extract global styles webfonts introspector to its own package

projects/packages/global-styles-webfonts-introspector/.gitattributes

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+# Files not needed to be distributed in the package.
+.gitattributes    export-ignore
+.github/          export-ignore
+package.json      export-ignore
+
+# Files to include in the mirror repo, but excluded via gitignore
+# Remember to end all directories with `/**` to properly tag every file.
+# /src/js/example.min.js  production-include
+
+# Files to exclude from the mirror repo, but included in the monorepo.
+# Remember to end all directories with `/**` to properly tag every file.
+.gitignore        production-exclude
+changelog/**      production-exclude
+phpunit.xml.dist  production-exclude
+.phpcs.dir.xml    production-exclude
+tests/**          production-exclude

projects/packages/global-styles-webfonts-introspector/.gitignore

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+vendor/
+node_modules/

projects/packages/global-styles-webfonts-introspector/.phpcs.dir.xml

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+<?xml version="1.0"?>
+<ruleset>
+
+	<rule ref="WordPress.WP.I18n">
+		<properties>
+			<property name="text_domain" type="array">
+				<element value="package-name" />
+			</property>
+		</properties>
+	</rule>
+	<rule ref="Jetpack.Functions.I18n">
+		<properties>
+			<property name="text_domain" value="package-name" />
+		</properties>
+	</rule>
+
+	<rule ref="WordPress.Utils.I18nTextDomainFixer">
+		<properties>
+			<property name="old_text_domain" type="array" />
+			<property name="new_text_domain" value="package-name" />
+		</properties>
+	</rule>
+
+</ruleset>

projects/packages/global-styles-webfonts-introspector/CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+

projects/packages/global-styles-webfonts-introspector/README.md

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+# global-styles-webfonts-introspector
+
+Looks for webfonts picked in global styles
+
+## How to install global-styles-webfonts-introspector
+
+### Installation From Git Repo
+
+## Contribute
+
+## Get Help
+
+## Security
+
+Need to report a security vulnerability? Go to [https://automattic.com/security/](https://automattic.com/security/) or directly to our security bug bounty site [https://hackerone.com/automattic](https://hackerone.com/automattic).
+
+## License
+
+global-styles-webfonts-introspector is licensed under [GNU General Public License v2 (or later)](./LICENSE.txt)
+

projects/packages/global-styles-webfonts-introspector/composer.json

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+{
+	"name": "automattic/jetpack-global-styles-webfonts-introspector",
+	"description": "Looks for webfonts picked in global styles",
+	"type": "library",
+	"license": "GPL-2.0-or-later",
+	"require": {},
+	"require-dev": {
+		"yoast/phpunit-polyfills": "1.0.3",
+		"automattic/jetpack-changelogger": "^3.0"
+	},
+	"autoload": {
+		"classmap": [
+			"src/"
+		]
+	},
+	"scripts": {
+		"phpunit": [
+			"./vendor/phpunit/phpunit/phpunit --colors=always"
+		],
+		"test-coverage": [
+			"php -dpcov.directory=. ./vendor/bin/phpunit --coverage-clover \"$COVERAGE_DIR/clover.xml\""
+		],
+		"test-php": [
+			"@composer phpunit"
+		]
+	},
+	"repositories": [
+		{
+			"type": "path",
+			"url": "../../packages/*",
+			"options": {
+				"monorepo": true
+			}
+		}
+	],
+	"minimum-stability": "dev",
+	"prefer-stable": true,
+	"extra": {
+		"branch-alias": {
+			"dev-master": "0.1.x-dev"
+		},
+		"textdomain": "jetpack-global-styles-webfonts-introspector"
+	}
+}

projects/packages/global-styles-webfonts-introspector/package.json

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+{
+	"private": true,
+	"name": "@automattic/jetpack-global-styles-webfonts-introspector",
+	"version": "0.1.0-alpha",
+	"description": "Looks for webfonts picked in global styles",
+	"homepage": "https://jetpack.com",
+	"bugs": {
+		"url": "https://github.com/Automattic/jetpack/issues"
+	},
+	"repository": {
+		"type": "git",
+		"url": "https://github.com/Automattic/jetpack.git"
+	},
+	"license": "GPL-2.0-or-later",
+	"author": "Automattic",
+	"scripts": {
+		"build": "echo 'Not implemented.'",
+		"build-js": "echo 'Not implemented.'",
+		"build-production": "echo 'Not implemented.'",
+		"build-production-js": "echo 'Not implemented.'",
+		"clean": "true"
+	},
+	"devDependencies": {},
+	"engines": {
+		"node": "^14.18.3 || ^16.13.2",
+		"pnpm": "^6.32.3",
+		"yarn": "use pnpm instead - see docs/yarn-upgrade.md"
+	}
+}

projects/packages/global-styles-webfonts-introspector/phpunit.xml.dist

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+<phpunit bootstrap="tests/php/bootstrap.php" backupGlobals="false" colors="true" convertDeprecationsToExceptions="true">
+	<testsuites>
+		<testsuite name="main">
+			<directory prefix="test" suffix=".php">tests/php</directory>
+		</testsuite>
+	</testsuites>
+	<filter>
+		<whitelist processUncoveredFilesFromWhitelist="false">
+			<!-- Better to only include "src" than to add "." and then exclude "tests", "vendor", and so on, as PHPUnit still scans the excluded directories. -->
+			<!-- Add additional lines for any files or directories outside of src/ that need coverage. -->
+			<directory suffix=".php">src</directory>
+		</whitelist>
+	</filter>
+</phpunit>

projects/packages/global-styles-webfonts-introspector/src/global-styles-webfonts-introspector.php

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+<?php
+/**
+ * Global styles webfonts introspector
+ *
+ * @package automattic/global-styles-webfonts-introspector
+ * @since 0.1.0
+ */
+
+namespace Automattic\Jetpack\Fonts;
+
+/**
+ * Extract the font family slug from a settings object.
+ *
+ * @param object $setting The setting object.
+ *
+ * @return string|void
+ */
+function extract_font_slug_from_setting( $setting ) {
+	if ( isset( $setting['typography'] ) && isset( $setting['typography']['fontFamily'] ) ) {
+		$font_family = $setting['typography']['fontFamily'];
+
+		// Full string: var(--wp--preset--font-family--slug).
+		// We do not care about the origin of the font, only its slug.
+		preg_match( '/font-family--(?P<slug>.+)\)$/', $font_family, $matches );
+
+		if ( isset( $matches['slug'] ) ) {
+			return $matches['slug'];
+		}
+
+		// Full string: var:preset|font-family|slug
+		// We do not care about the origin of the font, only its slug.
+		preg_match( '/font-family\|(?P<slug>.+)$/', $font_family, $matches );
+
+		if ( isset( $matches['slug'] ) ) {
+			return $matches['slug'];
+		}
+
+		return $font_family;
+	}
+}
+
+/**
+ * Introspect global styles for webfonts.
+ */
+function introspect_global_styles_webfonts() {
+	if ( ! function_exists( 'gutenberg_get_global_styles' ) ) {
+		return;
+	}
+
+	$global_styles = gutenberg_get_global_styles();
+
+	$found_webfonts = array();
+
+	// Look for fonts in block presets...
+	if ( isset( $global_styles['blocks'] ) ) {
+		foreach ( $global_styles['blocks'] as $setting ) {
+			$font_slug = extract_font_slug_from_setting( $setting );
+
+			if ( $font_slug ) {
+				$found_webfonts[ $font_slug ] = 1;
+			}
+		}
+	}
+
+	// Look for fonts in HTML element presets...
+	if ( isset( $global_styles['elements'] ) ) {
+		foreach ( $global_styles['elements'] as $setting ) {
+			$font_slug = extract_font_slug_from_setting( $setting );
+
+			if ( $font_slug ) {
+				$found_webfonts[ $font_slug ] = 1;
+			}
+		}
+	}
+
+	// Check if a global typography setting was defined.
+	$font_slug = extract_font_slug_from_setting( $global_styles );
+
+	if ( $font_slug ) {
+		$found_webfonts[ $font_slug ] = 1;
+	}
+
+	return array_keys( $found_webfonts );
+}

projects/packages/global-styles-webfonts-introspector/tests/php/bootstrap.php

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+<?php
+/**
+ * Bootstrap.
+ *
+ * @package automattic/
+ */
+
+/**
+ * Include the composer autoloader.
+ */
+require_once __DIR__ . '/../../vendor/autoload.php';