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wp-content/plugins/query-monitor/classes/CLI.php

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+<?php declare(strict_types = 1);
+/**
+ * Plugin CLI command.
+ *
+ * @package query-monitor
+ */
+
+class QM_CLI extends QM_Plugin {
+
+	/**
+	 * @param string $file
+	 */
+	protected function __construct( $file ) {
+
+		# Register command
+		WP_CLI::add_command( 'qm enable', array( $this, 'enable' ) );
+
+		# Parent setup:
+		parent::__construct( $file );
+
+	}
+
+	/**
+	 * Enable QM by creating the symlink for db.php
+	 *
+	 * @return void
+	 */
+	public function enable() {
+		$drop_in = WP_CONTENT_DIR . '/db.php';
+
+		if ( file_exists( $drop_in ) ) {
+			$contents = file_get_contents( $drop_in );
+
+			if ( false !== $contents && false !== strpos( $contents, 'class QM_DB' ) ) {
+				WP_CLI::success( "Query Monitor's wp-content/db.php is already in place" );
+				exit( 0 );
+			} else {
+				WP_CLI::error( 'Unknown wp-content/db.php is already in place' );
+			}
+		}
+
+		if ( defined( 'QM_DB_SYMLINK' ) && ! QM_DB_SYMLINK ) {
+			WP_CLI::warning( 'Creation of symlink prevented by QM_DB_SYMLINK constant.' );
+			exit( 0 );
+		}
+
+		if ( ! function_exists( 'symlink' ) ) {
+			WP_CLI::error( 'The symlink function is not available' );
+		}
+
+		if ( symlink( $this->plugin_path( 'wp-content/db.php' ), $drop_in ) ) {
+			WP_CLI::success( 'wp-content/db.php symlink created' );
+			exit( 0 );
+		} else {
+			WP_CLI::error( 'Failed to create wp-content/db.php symlink' );
+		}
+	}
+
+	/**
+	 * @param string $file
+	 * @return self
+	 */
+	public static function init( $file = null ) {
+
+		static $instance = null;
+
+		if ( ! $instance ) {
+			$instance = new QM_CLI( $file );
+		}
+
+		return $instance;
+
+	}
+
+}