diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..ccef0560f5e81eb78c47d43c0464ed4e04ee6434
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/vendor/
+.idea
\ No newline at end of file
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000000000000000000000000000000000000..3700971ef8209eb776ccb859e0dc2fc99937f6cc
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,31 @@
+{
+ "name": "wpdesk/wp-basic-requirements",
+ "authors": [
+ {
+ "name": "Krzysiek",
+ "email": "krzysiek@wpdesk.pl"
+ }
+ ],
+ "require": {
+ "php": ">=5.5"
+ },
+ "require-dev": {
+ "phpunit/phpunit": "<7",
+ "wp-coding-standards/wpcs": "^0.14.1",
+ "squizlabs/php_codesniffer": "^3.0.2",
+ "mockery/mockery": "*",
+ "10up/wp_mock": "*",
+ "wimg/php-compatibility": "^8"
+ },
+ "autoload": {
+ },
+ "autoload-dev": {
+ },
+ "scripts": {
+ "phpcs": "phpcs",
+ "phpunit-unit": "phpunit --configuration phpunit-unit.xml --coverage-text --colors=never",
+ "phpunit-unit-fast": "phpunit --configuration phpunit-unit.xml --no-coverage",
+ "phpunit-integration": "phpunit --configuration phpunit-integration.xml --coverage-text --colors=never",
+ "phpunit-integration-fast": "phpunit --configuration phpunit-integration.xml --no-coverage"
+ }
+}
diff --git a/src/Basic_Requirement_Checker.php b/src/Basic_Requirement_Checker.php
new file mode 100644
index 0000000000000000000000000000000000000000..55ecb27653e8f380be5710a337689a65d7e7b62b
--- /dev/null
+++ b/src/Basic_Requirement_Checker.php
@@ -0,0 +1,310 @@
+<?php
+
+/**
+ * Checks requirements for plugin
+ * have to be compatible with PHP 5.2.x
+ */
+class WPDesk_Basic_Requirement_Checker {
+ /** @var string */
+ private $plugin_name = '';
+
+ /** @var string */
+ private $plugin_file = '';
+
+ /** @var string */
+ private $min_php_version;
+
+ /** @var string */
+ private $min_wp_version;
+
+ /** @var array */
+ private $plugin_require;
+
+ /** @var array */
+ private $module_require;
+
+ /** @var array */
+ private $setting_require;
+
+ /** @var array */
+ private $notices;
+
+ /**
+ * @param $plugin_file
+ * @param $php_version
+ * @param $wp_version
+ * @param string|null $wc_version
+ */
+ public function __construct( $plugin_file, $php_version, $wp_version ) {
+ $this->plugin_file = $plugin_file;
+ $this->plugin_name = $this->extract_plugin_title_from_header( $plugin_file );
+ $this->set_min_php_require( $php_version );
+ $this->set_min_wp_require( $wp_version );
+
+ $this->plugin_require = array();
+ $this->module_require = array();
+ $this->setting_require = array();
+ $this->notices = array();
+ }
+
+ /**
+ * @param string $version
+ *
+ * @return $this
+ */
+ public function set_min_php_require( $version ) {
+ $this->min_php_version = $version;
+
+ return $this;
+ }
+
+ /**
+ * @param string $version
+ *
+ * @return $this
+ */
+ public function set_min_wp_require( $version ) {
+ $this->min_wp_version = $version;
+
+ return $this;
+ }
+
+ /**
+ * @param string $version
+ *
+ * @return $this
+ */
+ public function set_min_wc_require( $version ) {
+ $this->min_wc_version = $version;
+
+ return $this;
+ }
+
+ /**
+ * @param string $plugin_name
+ * @param string $nice_plugin_name Nice plugin name for better looks in notice
+ *
+ * @return $this
+ */
+ public function add_plugin_require( $plugin_name, $nice_plugin_name = null ) {
+ if ( is_null( $nice_plugin_name ) ) {
+ $this->plugin_require[ $plugin_name ] = $plugin_name;
+ } else {
+ $this->plugin_require[ $plugin_name ] = $nice_plugin_name;
+ }
+
+ return $this;
+ }
+
+ /**
+ * @param string $module_name
+ * @param string $nice_name Nice module name for better looks in notice
+ *
+ * @return $this
+ */
+ public function add_php_module_require( $module_name, $nice_name = null ) {
+ if ( is_null( $nice_name ) ) {
+ $this->module_require[ $module_name ] = $module_name;
+ } else {
+ $this->module_require[ $module_name ] = $nice_name;
+ }
+
+ return $this;
+ }
+
+ /**
+ * @param string $setting
+ * @param mixed $value
+ *
+ * @return $this
+ */
+ public function add_php_setting_require( $setting, $value ) {
+ $this->setting_require[ $setting ] = $value;
+
+ return $this;
+ }
+
+ /**
+ * @param string $file
+ *
+ * @return string mixed
+ */
+ private function extract_plugin_title_from_header( $file ) {
+ $plugin_data = get_file_data( $file, array(
+ 'title' => 'Plugin Name'
+ ) );
+
+ return $plugin_data['title'];
+ }
+
+ /**
+ * @return bool
+ */
+ public function are_requirements_met() {
+ $this->notices = $this->prepare_requirement_notices();
+
+ return count( $this->notices ) === 0;
+ }
+
+ /**
+ * @return array
+ */
+ private function prepare_requirement_notices() {
+ $notices = array();
+ if ( ! $this->is_php_at_least( $this->min_php_version ) ) {
+ $notices[] = $this->prepare_notice_message( sprintf( __( 'The “%s” plugin cannot run on PHP versions older than %s. Please contact your host and ask them to upgrade.', 'wpdesk-plugin' ), esc_html( $this->plugin_name ), $this->min_php_version ) );
+ }
+ if ( ! $this->is_wp_at_least( $this->min_wp_version ) ) {
+ $notices[] = $this->prepare_notice_message( sprintf( __( 'The “%s” plugin cannot run on WordPress versions older than %s. Please update WordPress.', 'wpdesk-plugin' ), esc_html( $this->plugin_name ), $this->min_wp_version ) );
+ }
+ $notices = $this->append_plugin_require_notices( $notices );
+ $notices = $this->append_module_require_notices( $notices );
+ $notices = $this->append_settings_require_notices( $notices );
+
+ return $notices;
+ }
+
+ /**
+ * @param array $notices
+ *
+ * @return array
+ */
+ private function append_module_require_notices( $notices ) {
+ if ( count( $this->module_require ) > 0 ) {
+ foreach ( $this->module_require as $module_name => $nice_module_name ) {
+ if ( ! $this->is_module_active( $module_name ) ) {
+ $notices[] = $this->prepare_notice_message( sprintf( __( 'The “%s” plugin cannot run without %s php module installed. Please contact your host and ask them to install %s.', 'wpdesk-plugin' ), esc_html( $this->plugin_name ), esc_html( basename( $nice_module_name ) ), esc_html( basename( $nice_module_name ) ) ) );
+ }
+ }
+ }
+
+ return $notices;
+ }
+
+ /**
+ * @param array $notices
+ *
+ * @return array
+ */
+ private function append_settings_require_notices( $notices ) {
+ if ( count( $this->setting_require ) > 0 ) {
+ foreach ( $this->setting_require as $setting => $value ) {
+ if ( ! $this->is_setting_set( $setting, $value ) ) {
+ $notices[] = $this->prepare_notice_message( sprintf( __( 'The “%s” plugin cannot run without %s php setting set to %s. Please contact your host and ask them to set %s.', 'wpdesk-plugin' ), esc_html( $this->plugin_name ), esc_html( basename( $setting ) ), esc_html( basename( $value ) ), esc_html( basename( $setting ) ) ) );
+ }
+ }
+ }
+
+ return $notices;
+ }
+
+ /**
+ * @param array $notices
+ *
+ * @return array
+ */
+ private function append_plugin_require_notices( $notices ) {
+ if ( count( $this->plugin_require ) > 0 ) {
+ foreach ( $this->plugin_require as $plugin_name => $nice_plugin_name ) {
+ if ( ! $this->is_wp_plugin_active( $plugin_name ) ) {
+ $notices[] = $this->prepare_notice_message( sprintf( __( 'The “%s” plugin cannot run without %s active. Please install and activate %s plugin.', 'wpdesk-plugin' ), esc_html( $this->plugin_name ), esc_html( basename( $nice_plugin_name ) ), esc_html( basename( $nice_plugin_name ) ) ) );
+ }
+ }
+ }
+
+ return $notices;
+ }
+
+ /**
+ * @param string $name
+ * @param mixed $value
+ *
+ * @return bool
+ */
+ public static function is_setting_set( $name, $value ) {
+ return ini_get( $name ) === strval( $value );
+ }
+
+ /**
+ * @param string $name
+ *
+ * @return bool
+ */
+ public static function is_module_active( $name ) {
+ return extension_loaded( $name );
+ }
+
+ /**
+ * @return void
+ */
+ public function disable_plugin_render_notice() {
+ add_action( 'admin_notices', array( $this, 'deactivate_action' ) );
+ add_action( 'admin_notices', array( $this, 'render_notices_action' ) );
+ }
+
+ /**
+ * Shoud be called as WordPress action
+ *
+ * @return void
+ */
+ public function render_notices_action() {
+ foreach ( $this->notices as $notice ) {
+ echo $notice;
+ }
+ }
+
+ /**
+ * Prepares message in html format
+ *
+ * @param string $message
+ *
+ * @return string
+ */
+ private function prepare_notice_message( $message ) {
+ return '<div class="error"><p>' . $message . '</p></div>';
+ }
+
+ /**
+ * @return void
+ */
+ public function deactivate_action() {
+ if ( isset( $this->plugin_file ) ) {
+ deactivate_plugins( plugin_basename( $this->plugin_file ) );
+ }
+ }
+
+ /**
+ * @param $min_version
+ *
+ * @return mixed
+ */
+ public static function is_php_at_least( $min_version ) {
+ return version_compare( phpversion(), $min_version, '>=' );
+ }
+
+ /**
+ * @param string $min_version
+ *
+ * @return bool
+ */
+ public static function is_wp_at_least( $min_version ) {
+ return version_compare( get_bloginfo( 'version' ), $min_version, '>=' );
+ }
+
+ /**
+ * Checks if plugin is active. Needs to be enabled in deferred way.
+ *
+ * @param string $plugin_file
+ *
+ * @return bool
+ */
+ public static function is_wp_plugin_active( $plugin_file ) {
+ $active_plugins = (array) get_option( 'active_plugins', array() );
+
+ if ( is_multisite() ) {
+ $active_plugins = array_merge( $active_plugins, get_site_option( 'active_sitewide_plugins', array() ) );
+ }
+
+ return in_array( $plugin_file, $active_plugins ) || array_key_exists( $plugin_file, $active_plugins );
+ }
+}
diff --git a/src/Plugin_Info.php b/src/Plugin_Info.php
new file mode 100644
index 0000000000000000000000000000000000000000..a169391f46b33c0ad4779893484e4bf7377f5640
--- /dev/null
+++ b/src/Plugin_Info.php
@@ -0,0 +1,120 @@
+<?php
+
+if ( ! class_exists( 'WPDesk_Buildable' ) ) {
+ require_once 'Builder/Buildable.php';
+}
+
+
+/**
+ * Structure with core info about plugin
+ * have to be compatible with PHP 5.2.x
+ */
+class WPDesk_Plugin_Info implements WPDesk_Buildable {
+ /** @var string */
+ private $plugin_file_name;
+
+ /** @var string */
+ private $plugin_dir;
+
+ /** @var string */
+ private $class_name;
+
+ /** @var string */
+ private $version;
+
+ /** @var string */
+ private $product_id;
+
+ /** @var \DateTimeInterface */
+ private $release_date;
+
+ /**
+ * @return string
+ */
+ public function get_plugin_file_name() {
+ return $this->plugin_file_name;
+ }
+
+ /**
+ * @param string $plugin_name
+ */
+ public function set_plugin_file_name( $plugin_name ) {
+ $this->plugin_file_name = $plugin_name;
+ }
+
+ /**
+ * @return string
+ */
+ public function get_plugin_dir() {
+ return $this->plugin_dir;
+ }
+
+ /**
+ * @param string $plugin_dir
+ */
+ public function set_plugin_dir( $plugin_dir ) {
+ $this->plugin_dir = $plugin_dir;
+ }
+
+ /**
+ * @return string
+ */
+ public function get_version() {
+ return $this->version;
+ }
+
+ /**
+ * @param string $version
+ */
+ public function set_version( $version ) {
+ $this->version = $version;
+ }
+
+ /**
+ * @return string
+ */
+ public function get_product_id() {
+ return $this->product_id;
+ }
+
+ /**
+ * @param string $product_id
+ */
+ public function set_product_id( $product_id ) {
+ $this->product_id = $product_id;
+ }
+
+ /**
+ * @return DateTimeInterface
+ */
+ public function get_release_date() {
+ return $this->release_date;
+ }
+
+ /**
+ * @param \DateTimeInterface $release_date
+ */
+ public function set_release_date( $release_date ) {
+ $this->release_date = $release_date;
+ }
+
+ public function get_class_name() {
+ return $this->class_name;
+ }
+
+ /**
+ * @param string $class_name
+ */
+ public function set_class_name( $class_name ) {
+ $this->class_name = $class_name;
+ }
+
+ public function get_build_priority() {
+ return 0;
+ }
+
+ public function get_post_load_file() {
+ }
+
+
+}
\ No newline at end of file