Modernize plugin with React settings page and PHP 7.4+

.gitignore

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+# Dependencies
+node_modules/
+
+# Build output (committed for distribution)
+# build/
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Logs
+*.log
+npm-debug.log*
+pnpm-debug.log*
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo

.wp-env.json

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+{
+	"$schema": "https://schemas.wp.org/trunk/wp-env.json",
+	"core": null,
+	"phpVersion": "8.2",
+	"plugins": [
+		".",
+		"https://downloads.wordpress.org/plugin/press-this.zip"
+	],
+	"config": {
+		"WP_DEBUG": true,
+		"SCRIPT_DEBUG": true
+	}
+}

build/index.php

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+<?php
+/**
+ * Main entry point for auto-generated asset registration.
+ * Do not edit this file manually.
+ *
+ * @package press_this_extended
+ */
+
+// Load version constant.
+$version_file = __DIR__ . '/version.php';
+if ( file_exists( $version_file ) ) {
+	require_once $version_file;
+}
+
+// Load script module registration.
+$modules_file = __DIR__ . '/modules.php';
+if ( file_exists( $modules_file ) ) {
+	require_once $modules_file;
+}
+
+// Load script registration.
+$scripts_file = __DIR__ . '/scripts.php';
+if ( file_exists( $scripts_file ) ) {
+	require_once $scripts_file;
+}
+
+// Load style registration.
+$styles_file = __DIR__ . '/styles.php';
+if ( file_exists( $styles_file ) ) {
+	require_once $styles_file;
+}
+
+// Load routes registration.
+$routes_file = __DIR__ . '/routes.php';
+if ( file_exists( $routes_file ) ) {
+	require_once $routes_file;
+}
+
+// Load pages registration.
+$pages_file = __DIR__ . '/pages.php';
+if ( file_exists( $pages_file ) ) {
+	require_once $pages_file;
+}

build/modules.php

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+<?php
+/**
+ * Script module registration - Auto-generated by build process.
+ * Do not edit this file manually.
+ *
+ * @package press_this_extended
+ */
+
+if ( ! function_exists( 'press_this_extended_register_script_modules' ) ) {
+	/**
+	 * Register all script modules.
+	 */
+	function press_this_extended_register_script_modules() {
+		$modules_dir = __DIR__ . '/modules';
+		$modules_file = $modules_dir . '/index.php';
+
+		if ( ! file_exists( $modules_file ) ) {
+			return;
+		}
+
+		$modules = require $modules_file;
+		$base_url = plugins_url( 'build/modules/', dirname( __FILE__ ) );
+		$extension = defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ? '.js' : '.min.js';
+
+		foreach ( $modules as $module ) {
+			$asset_path = $modules_dir . '/' . $module['asset'];
+			$asset = file_exists( $asset_path ) ? require $asset_path : array();
+
+			wp_register_script_module(
+				$module['id'],
+				$base_url . $module['path'] . $extension,
+				$asset['module_dependencies'] ?? array(),
+				$asset['version'] ?? false,
+				array(
+					'fetchpriority' => 'low',
+					'in_footer'     => true,
+				)
+			);
+		}
+	}
+
+	add_action( 'wp_default_scripts', 'press_this_extended_register_script_modules' );
+	remove_action( 'wp_default_scripts', 'wp_default_script_modules' );
+}

build/modules/index.php

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+<?php
+/**
+ * Script module registry - Auto-generated by build process.
+ * Do not edit this file manually.
+ *
+ * @package press_this_extended
+ */
+
+return array(
+
+);

build/scripts.php

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+<?php
+/**
+ * Script registration - Auto-generated by build process.
+ * Do not edit this file manually.
+ *
+ * @package press_this_extended
+ */
+
+if ( ! function_exists( 'press_this_extended_override_script' ) ) {
+	/**
+	 * Registers a script according to `wp_register_script`. Honors this request by
+	 * reassigning internal dependency properties of any script handle already
+	 * registered by that name. It does not deregister the original script, to
+	 * avoid losing inline scripts which may have been attached.
+	 *
+	 * @param WP_Scripts       $scripts   WP_Scripts instance.
+	 * @param string           $handle    Name of the script. Should be unique.
+	 * @param string           $src       Full URL of the script, or path of the script relative to the WordPress root directory.
+	 * @param array            $deps      Optional. An array of registered script handles this script depends on. Default empty array.
+	 * @param string|bool|null $ver       Optional. String specifying script version number, if it has one, which is added to the URL
+	 *                                    as a query string for cache busting purposes. If version is set to false, a version
+	 *                                    number is automatically added equal to current installed WordPress version.
+	 *                                    If set to null, no version is added.
+	 * @param bool             $in_footer Optional. Whether to enqueue the script before </body> instead of in the <head>.
+	 *                                    Default 'false'.
+	 */
+	function press_this_extended_override_script( $scripts, $handle, $src, $deps = array(), $ver = false, $in_footer = false ) {
+		$script = $scripts->query( $handle, 'registered' );
+		if ( $script ) {
+			/*
+			 * In many ways, this is a reimplementation of `wp_register_script` but
+			 * bypassing consideration of whether a script by the given handle had
+			 * already been registered.
+			 */
+
+			// See: `_WP_Dependency::__construct` .
+			$script->src  = $src;
+			$script->deps = $deps;
+			$script->ver  = $ver;
+			$script->args = $in_footer ? 1 : null;
+		} else {
+			$scripts->add( $handle, $src, $deps, $ver, ( $in_footer ? 1 : null ) );
+		}
+
+		if ( in_array( 'wp-i18n', $deps, true ) ) {
+			$scripts->set_translations( $handle );
+		}
+	}
+}
+
+if ( ! function_exists( 'press_this_extended_register_package_scripts' ) ) {
+	/**
+	 * Register all package scripts.
+	 */
+	function press_this_extended_register_package_scripts( $scripts ) {
+		$default_version = defined( 'PRESS_THIS_EXTENDED_VERSION' ) && ! SCRIPT_DEBUG ? PRESS_THIS_EXTENDED_VERSION : time();
+		$extension       = defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ? '.js' : '.min.js';
+
+		$scripts_dir  = __DIR__ . '/scripts';
+		$scripts_file = $scripts_dir . '/index.php';
+
+		if ( ! file_exists( $scripts_file ) ) {
+			return;
+		}
+
+		$scripts_data = require $scripts_file;
+		$plugin_dir   = dirname( __FILE__ );
+
+		foreach ( $scripts_data as $script_data ) {
+			$asset_file   = $scripts_dir . '/' . $script_data['asset'];
+			$asset        = file_exists( $asset_file ) ? require $asset_file : array();
+			$dependencies = $asset['dependencies'] ?? array();
+			$version      = $asset['version'] ?? $default_version;
+
+			press_this_extended_override_script(
+				$scripts,
+				$script_data['handle'],
+				plugins_url( 'build/scripts/' . $script_data['path'] . $extension, $plugin_dir ),
+				$dependencies,
+				$version,
+				true
+			);
+		}
+	}
+
+	add_action( 'wp_default_scripts', 'press_this_extended_register_package_scripts' );
+}

build/scripts/index.php

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+<?php
+/**
+ * Script registry - Auto-generated by build process.
+ * Do not edit this file manually.
+ *
+ * @package press_this_extended
+ */
+
+return array(
+	array(
+		'handle' => 'pte-settings',
+		'path' => 'settings/index',
+		'asset' => 'settings/index.min.asset.php',
+	),
+);