<?php

namespace Simple_History\Services;

use Simple_History\Helpers;

/**
 * Add a link to the History Settings Page on the Plugins -> Installed Plugins screen.
 */
class Plugin_List_Link extends Service {
	/** @inheritdoc */
	public function loaded() {
		add_filter( 'plugin_action_links_simple-history/index.php', array( $this, 'on_plugin_action_links' ), 10, 4 );
	}

	/**
	 * Add a link to the History Settings Page on the Plugins -> Installed Plugins screen.
	 *
	 * @param array  $actions   Array of plugin action links.
	 * @param string $plugin_file Path to the plugin file relative to the plugins directory.
	 * @param array  $plugin_data An array of plugin data.
	 * @param string $context   The plugin context. By default this can be 'all', 'active', 'inactive',
	 *                      'recently_activated', 'upgrade', 'mustuse', 'dropins', 'search',
	 *                      'paused', 'auto-update', 'dropin'.
	 * @return array
	 */
	public function on_plugin_action_links( $actions, $plugin_file, $plugin_data, $context ) {
		// Only add link if user has the right to view the settings page.
		if ( ! current_user_can( Helpers::get_view_settings_capability() ) ) {
			return $actions;
		}

		if ( empty( $actions ) ) {
			// Create array if actions is empty (and therefore is assumed to be a string by PHP & results in PHP 7.1+ fatal error due to trying to make array modifications on what's assumed to be a string).
			$actions = [];
		} elseif ( is_string( $actions ) ) {
			// Convert the string (which it might've been retrieved as) to an array for future use as an array.
			$actions = [ $actions ];
		}

		$actions[] = "<a href='" . esc_url( Helpers::get_settings_page_url() ) . "'>" . __( 'Settings', 'simple-history' ) . '</a>';

		return $actions;
	}
}
