From a5228809f2803e0c932b632ceecffc61ec8b78ce Mon Sep 17 00:00:00 2001
From: Bagus <25834188+contactjavas@users.noreply.github.com>
Date: Tue, 23 Jul 2019 15:20:10 +0700
Subject: [PATCH] Initial upload

---
 .gitattributes                      |   2 +
 autoload.php                        |  33 +++
 helpers/class-admin-ajax-helper.php |  66 ++++++
 helpers/class-css-helper.php        | 124 ++++++++++
 helpers/class-file-helper.php       | 196 ++++++++++++++++
 helpers/class-image-size-helper.php |  88 +++++++
 helpers/class-js-helper.php         | 149 ++++++++++++
 helpers/class-metabox-helper.php    | 161 +++++++++++++
 helpers/class-post-type-helper.php  | 351 ++++++++++++++++++++++++++++
 helpers/class-taxonomy-helper.php   | 276 ++++++++++++++++++++++
 utilities/class-admin-ajax.php      |  37 +++
 utilities/class-asset.php           |  97 ++++++++
 utilities/class-css.php             |  37 +++
 utilities/class-debug.php           |  60 +++++
 utilities/class-file-util.php       |  87 +++++++
 utilities/class-image-size.php      |  27 +++
 utilities/class-js.php              | 108 +++++++++
 utilities/class-metabox.php         |  37 +++
 utilities/class-post-type.php       |  39 ++++
 utilities/class-taxonomy.php        |  39 ++++
 utilities/class-vars.php            |  60 +++++
 wp-functions-wrapper.php            |  25 ++
 22 files changed, 2099 insertions(+)
 create mode 100644 .gitattributes
 create mode 100644 autoload.php
 create mode 100644 helpers/class-admin-ajax-helper.php
 create mode 100644 helpers/class-css-helper.php
 create mode 100644 helpers/class-file-helper.php
 create mode 100644 helpers/class-image-size-helper.php
 create mode 100644 helpers/class-js-helper.php
 create mode 100644 helpers/class-metabox-helper.php
 create mode 100644 helpers/class-post-type-helper.php
 create mode 100644 helpers/class-taxonomy-helper.php
 create mode 100644 utilities/class-admin-ajax.php
 create mode 100644 utilities/class-asset.php
 create mode 100644 utilities/class-css.php
 create mode 100644 utilities/class-debug.php
 create mode 100644 utilities/class-file-util.php
 create mode 100644 utilities/class-image-size.php
 create mode 100644 utilities/class-js.php
 create mode 100644 utilities/class-metabox.php
 create mode 100644 utilities/class-post-type.php
 create mode 100644 utilities/class-taxonomy.php
 create mode 100644 utilities/class-vars.php
 create mode 100644 wp-functions-wrapper.php

diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..dfe0770
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,2 @@
+# Auto detect text files and perform LF normalization
+* text=auto
diff --git a/autoload.php b/autoload.php
new file mode 100644
index 0000000..b03d33e
--- /dev/null
+++ b/autoload.php
@@ -0,0 +1,33 @@
+<?php
+/**
+ * Autoloading
+ *
+ * @package WPFW
+ */
+
+defined('ABSPATH') || die("Can't access directly");
+
+// require utility classes.
+require_once __DIR__ . '/utilities/class-asset.php';
+require_once __DIR__ . '/utilities/class-debug.php';
+require_once __DIR__ . '/utilities/class-file-util.php';
+require_once __DIR__ . '/utilities/class-vars.php';
+
+// require helper classes.
+require_once __DIR__ . '/helpers/class-admin-ajax-helper.php';
+require_once __DIR__ . '/helpers/class-css-helper.php';
+require_once __DIR__ . '/helpers/class-file-helper.php';
+require_once __DIR__ . '/helpers/class-image-size-helper.php';
+require_once __DIR__ . '/helpers/class-js-helper.php';
+require_once __DIR__ . '/helpers/class-metabox-helper.php';
+require_once __DIR__ . '/helpers/class-post-type-helper.php';
+require_once __DIR__ . '/helpers/class-taxonomy-helper.php';
+
+// require utility classes.
+require_once __DIR__ . '/utilities/class-admin-ajax.php';
+require_once __DIR__ . '/utilities/class-css.php';
+require_once __DIR__ . '/utilities/class-image-size.php';
+require_once __DIR__ . '/utilities/class-js.php';
+require_once __DIR__ . '/utilities/class-metabox.php';
+require_once __DIR__ . '/utilities/class-post-type.php';
+require_once __DIR__ . '/utilities/class-taxonomy.php';
diff --git a/helpers/class-admin-ajax-helper.php b/helpers/class-admin-ajax-helper.php
new file mode 100644
index 0000000..0235469
--- /dev/null
+++ b/helpers/class-admin-ajax-helper.php
@@ -0,0 +1,66 @@
+<?php
+/**
+ * Admin ajax interfaces
+ *
+ * @package WPFW
+ */
+
+namespace Wpfw\Helpers;
+
+/**
+ * Class to provide admin ajax methods
+ */
+class Admin_Ajax_Helper {
+
+	/**
+	 * Item's id
+	 *
+	 * @var integer
+	 */
+	private $id = -1;
+
+	/**
+	 * Item's container
+	 *
+	 * @var array
+	 */
+	private $item = [];
+
+	/**
+	 * Register action
+	 *
+	 * @param string $action Action to be registered to wp_ajax_ .
+	 * @return object
+	 */
+	public function register( $action ) {
+		$this->id++;
+		$this->item[ $this->id ]               = [];
+		$this->item[ $this->id ]['action']     = $action;
+		$this->item[ $this->id ]['is_private'] = true;
+		return $this;
+	}
+
+	/**
+	 * Set the request as public
+	 *
+	 * @return object
+	 */
+	public function set_public() {
+		$this->item[ $this->id ]['is_private'] = false;
+		return $this;
+	}
+
+	/**
+	 * Set handler class for the request
+	 *
+	 * @param object $handler Class to handle the request.
+	 * @return void
+	 */
+	public function set_handler( $handler ) {
+		add_action( 'wp_ajax_' . $this->item[ $this->id ]['action'], [ $handler, 'ajax' ] );
+
+		if ( ! $this->item[ $this->id ]['is_private'] ) {
+			add_action( 'wp_ajax_nopriv_' . $this->item[ $this->id ]['action'], [ $handler, 'ajax' ] );
+		}
+	}
+}
diff --git a/helpers/class-css-helper.php b/helpers/class-css-helper.php
new file mode 100644
index 0000000..e744800
--- /dev/null
+++ b/helpers/class-css-helper.php
@@ -0,0 +1,124 @@
+<?php
+/**
+ * CSS enqueue interfaces
+ *
+ * @package WPFW
+ */
+
+namespace Wpfw\Helpers;
+
+/**
+ * Class to provide stylesheet enqueue methods
+ */
+class CSS_Helper {
+
+	/**
+	 * Item's id
+	 *
+	 * @var integer
+	 */
+	private $id = -1;
+
+	/**
+	 * Item's container
+	 *
+	 * @var array
+	 */
+	private $item = [];
+
+	/**
+	 * Register the stylesheet handle name
+	 *
+	 * @param string $handle Name of the stylesheet. Should be unique.
+	 * @return object
+	 */
+	public function register( $handle ) {
+		$this->id++;
+		$this->item[ $this->id ]           = [];
+		$this->item[ $this->id ]['handle'] = $handle;
+		return $this;
+	}
+
+	/**
+	 * Set the stylesheet url
+	 *
+	 * @param string $url Full URL of the stylesheet, or path of the stylesheet relative to the WordPress root directory.
+	 * @return object
+	 */
+	public function set_url( $url ) {
+		$this->item[ $this->id ]['url'] = $url;
+		return $this;
+	}
+
+	/**
+	 * Set the stylesheet dependencies
+	 *
+	 * @param array $deps An array of registered stylesheet handles which this stylesheet depends on.
+	 * @return object
+	 */
+	public function set_dependencies( $deps ) {
+		$this->item[ $this->id ]['deps'] = $deps;
+		return $this;
+	}
+
+	/**
+	 * Set the stylesheet version
+	 *
+	 * @param string $ver String specifying stylesheet version number.
+	 * @return object
+	 */
+	public function set_version( $ver ) {
+		$this->item[ $this->id ]['ver'] = $ver;
+		return $this;
+	}
+
+	/**
+	 * Register the stylesheet to WP
+	 *
+	 * @return void
+	 */
+	public function save() {
+		$handle = $this->item[ $this->id ]['handle'];
+		$url    = $this->item[ $this->id ]['url'];
+		$deps   = isset( $this->item[ $this->id ]['deps'] ) ? $this->item[ $this->id ]['deps'] : [];
+		$ver    = isset( $this->item[ $this->id ]['ver'] ) ? $this->item[ $this->id ]['ver'] : null; // remove default WordPress version for security.
+		$ver    = $ver && 'auto' === $ver ? Asset::get_modified_time( $url ) : $ver;
+
+		wp_register_style( $handle, $url, $deps, $ver );
+	}
+
+	/**
+	 * Enqueue the stylesheet
+	 *
+	 * @param string $handle Name of the stylesheet. Should be unique.
+	 * @return void
+	 */
+	public function enqueue( $handle = false ) {
+		if ( $handle ) {
+			wp_enqueue_style( $handle );
+		} else {
+			$this->save();
+			wp_enqueue_style( $this->item[ $this->id ]['handle'] );
+		}
+	}
+
+	/**
+	 * Unregister a stylesheet.
+	 *
+	 * @param string $handle Name of the stylesheet to be un-registered.
+	 * @return void
+	 */
+	public function deregister( $handle ) {
+		wp_deregister_style( $handle );
+	}
+
+	/**
+	 * Dequeue a stylesheet.
+	 *
+	 * @param string $handle Name of the stylesheet to be de-queued.
+	 * @return void
+	 */
+	public function dequeue( $handle ) {
+		wp_dequeue_style( $handle );
+	}
+}
diff --git a/helpers/class-file-helper.php b/helpers/class-file-helper.php
new file mode 100644
index 0000000..ac6d3a1
--- /dev/null
+++ b/helpers/class-file-helper.php
@@ -0,0 +1,196 @@
+<?php
+/**
+ * File helper interfaces
+ *
+ * @package WPFW
+ */
+
+namespace Wpfw\Helpers;
+
+/**
+ * Class to provide file helper methods
+ *
+ * @todo Many operations are phpcs-ignored, need to find proper solution
+ */
+class File_Helper {
+
+	/**
+	 * Maximum scan depth
+	 *
+	 * @var integer
+	 */
+	protected $max_scan_depth = 5;
+
+	/**
+	 * Copy a file, or recursively copy a folder and its contents
+	 *
+	 * @author      Aidan Lister <aidan@php.net>
+	 * @version     1.0.1
+	 * @link        http://aidanlister.com/2004/04/recursively-copying-directories-in-php/
+	 *
+	 * @param       string $source    Source path.
+	 * @param       string $dest      Destination path.
+	 * @param       int    $permissions New folder creation permissions.
+	 *
+	 * @return      bool     Returns true on success, false on failure
+	 */
+	public function copy( $source, $dest, $permissions = 0755 ) {
+		// check for symlinks.
+		if ( is_link( $source ) ) {
+			return symlink( readlink( $source ), $dest ); // phpcs:ignore
+		}
+
+		// simple copy for a file.
+		if ( is_file( $source ) ) {
+			return copy( $source, $dest );
+		}
+
+		// make destination directory.
+		if ( ! is_dir( $dest ) ) {
+			mkdir( $dest, $permissions ); // phpcs:ignore
+		}
+
+		// loop through the folder.
+		$dir   = dir( $source );
+		$entry = $dir->read();
+
+		while ( false !== $entry ) {
+			// skip pointers.
+			if ( '.' === $entry || '..' === $entry ) {
+				continue;
+			}
+
+			// deep copy directories.
+			$this->copy( "$source/$entry", "$dest/$entry", $permissions );
+		}
+
+		// clean up.
+		$dir->close();
+		return true;
+	}
+
+	/**
+	 * Thanks for PHP Community
+	 * - http://php.net/manual/en/function.rmdir.php#110489
+	 * - http://php.net/manual/de/function.rmdir.php#98622
+	 *
+	 * @param   string $dir    directory to be removed.
+	 *
+	 * @return  bool
+	 */
+	public function remove_dir( $dir ) {
+		$files = array_diff( scandir( $dir ), array( '.', '..' ) );
+
+		foreach ( $files as $file ) {
+			( is_dir( "$dir/$file" ) ) ? rmdir( "$dir/$file" ) : unlink( "$dir/$file" ); // phpcs:ignore
+		}
+
+		return rmdir( $dir ); // phpcs:ignore
+	}
+
+	/**
+	 * Empty a directory
+	 *
+	 * @param string $dir The directory path.
+	 * @return void
+	 */
+	public function empty_dir( $dir ) {
+		$files = array_diff( scandir( $dir ), array( '.', '..' ) );
+
+		foreach ( $files as $file ) {
+			( is_dir( "$dir/$file" ) ) ? rmdir( "$dir/$file" ) : unlink( "$dir/$file" ); // phpcs:ignore
+		}
+	}
+
+	/**
+	 * Based on scripts by Paul Wenzel (https://github.com/pwenzel)
+	 * on: Recursively include all PHP files (https://gist.github.com/pwenzel/3438784)
+	 *
+	 * @param       string $type      include/ require/ module .
+	 * @param       string $dir       directory to scan.
+	 * @param       int    $depth     the depth level.
+	 * @return void
+	 */
+	protected function scan_dir( $type, $dir, $depth ) {
+		if ( $depth > $this->max_scan_depth ) {
+			return;
+		}
+
+		$scan = glob( $dir . '/*' );
+
+		foreach ( $scan as $path ) {
+			if ( 'module' === $type ) {
+				if ( is_dir( $path ) ) {
+					$this->scan_dir( 'module', $path, $depth + 1 );
+				} else {
+					$pos = strpos( $path, 'autoload.php' );
+					if ( false !== $pos ) {
+						require_once $path;
+					}
+				}
+			} else {
+				if ( preg_match( '/\.php$/', $path ) ) {
+					if ( 'include' === $type ) {
+						include_once $path;
+					} elseif ( 'require' === $type ) {
+						require_once $path;
+					}
+				} elseif ( is_dir( $path ) ) {
+					if ( 'include' === $type ) {
+						$this->scan_dir( 'include', $path, $depth + 1 );
+					} elseif ( 'require' === $type ) {
+						$this->scan_dir( 'require', $path, $depth + 1 );
+					}
+				}
+			}
+		}
+	}
+
+	/**
+	 * Load components
+	 *
+	 * @param string  $dir The directory path.
+	 * @param integer $max_depth Maximum depth to scan.
+	 * @return void
+	 */
+	public function load_components( $dir, $max_depth = 1 ) {
+		if ( $max_depth < 1 ) {
+			$max_depth = 1;
+		}
+
+		$this->max_scan_depth = $max_depth;
+		$this->scan_dir( 'module', $dir, 1 );
+	}
+
+	/**
+	 * Include all files
+	 *
+	 * @param string  $dir The directory path.
+	 * @param integer $max_depth Maximum depth to scan.
+	 * @return void
+	 */
+	public function include_all( $dir, $max_depth = 1 ) {
+		if ( $max_depth < 1 ) {
+			$max_depth = 1;
+		}
+
+		$this->max_scan_depth = $max_depth;
+		$this->scan_dir( 'include', $dir, 1 );
+	}
+
+	/**
+	 * Require all files
+	 *
+	 * @param string  $dir The directory path.
+	 * @param integer $max_depth Maximum depth to scan.
+	 * @return void
+	 */
+	public function require_all( $dir, $max_depth = 1 ) {
+		if ( $max_depth < 1 ) {
+			$max_depth = 1;
+		}
+
+		$this->max_scan_depth = $max_depth;
+		$this->scan_dir( 'require', $dir, 1 );
+	}
+}
diff --git a/helpers/class-image-size-helper.php b/helpers/class-image-size-helper.php
new file mode 100644
index 0000000..197493d
--- /dev/null
+++ b/helpers/class-image-size-helper.php
@@ -0,0 +1,88 @@
+<?php
+/**
+ * Image size utility
+ *
+ * @package WPFW
+ */
+
+namespace Wpfw\Helpers;
+
+/**
+ * Class to add image size
+ */
+class Image_Size_Helper {
+
+	/**
+	 * Item's id
+	 *
+	 * @var integer
+	 */
+	private $id = -1;
+
+	/**
+	 * Item's container
+	 *
+	 * @var array
+	 */
+	private $item = [];
+
+	/**
+	 * Register image size
+	 *
+	 * @param string $size_name Image size identifier.
+	 * @return object
+	 */
+	public function register( $size_name ) {
+		$this->id++;
+		$this->item[ $this->id ]         = [];
+		$this->item[ $this->id ]['name'] = $size_name;
+		return $this;
+	}
+
+	/**
+	 * Set the width
+	 *
+	 * @param int $width Image width in pixels.
+	 * @return object
+	 */
+	public function set_width( $width ) {
+		$this->item[ $this->id ]['width'] = $width;
+		return $this;
+	}
+
+	/**
+	 * Set the height
+	 *
+	 * @param int $height Image height in pixels.
+	 * @return object
+	 */
+	public function set_height( $height ) {
+		$this->item[ $this->id ]['height'] = $height;
+		return $this;
+	}
+
+	/**
+	 * Set the crop mode
+	 *
+	 * @param boolean $crop Whether to crop images to specified width and height or resize.
+	 * @return object
+	 */
+	public function set_crop( $crop = true ) {
+		$this->item[ $this->id ]['crop'] = $crop;
+		return $this;
+	}
+
+	/**
+	 * Add the registered size
+	 *
+	 * @return void
+	 */
+	public function add() {
+		$name   = $this->item[ $this->id ]['name'];
+		$width  = isset( $this->item[ $this->id ]['width'] ) ? $this->item[ $this->id ]['width'] : 9999;
+		$height = isset( $this->item[ $this->id ]['height'] ) ? $this->item[ $this->id ]['height'] : 9999;
+		$crop   = isset( $this->item[ $this->id ]['crop'] ) ? $this->item[ $this->id ]['crop'] : false;
+
+		add_image_size( $name, $width, $height, $crop );
+	}
+}
diff --git a/helpers/class-js-helper.php b/helpers/class-js-helper.php
new file mode 100644
index 0000000..fe6e544
--- /dev/null
+++ b/helpers/class-js-helper.php
@@ -0,0 +1,149 @@
+<?php
+/**
+ * JS enqueue interfaces
+ *
+ * @package WPFW
+ */
+
+namespace Wpfw\Helpers;
+
+/**
+ * Class to provide script enqueue methods
+ */
+class JS_Helper {
+
+	/**
+	 * Item's id
+	 *
+	 * @var integer
+	 */
+	private $id = -1;
+
+	/**
+	 * Item's container
+	 *
+	 * @var array
+	 */
+	private $item = [];
+
+	/**
+	 * Register the script handle name
+	 *
+	 * @param string $handle Name of the script. Should be unique.
+	 * @return object
+	 */
+	public function register( $handle ) {
+		$this->id++;
+		$this->item[ $this->id ]         = [];
+		$this->item[ $this->id ]['name'] = $handle;
+		return $this;
+	}
+
+	/**
+	 * Set the script url
+	 *
+	 * @param string $url Full URL of the script, or path of the script relative to the WordPress root directory.
+	 * @return object
+	 */
+	public function set_url( $url ) {
+		$this->item[ $this->id ]['url'] = $url;
+		return $this;
+	}
+
+	/**
+	 * Set the script dependencies
+	 *
+	 * @param array $deps An array of registered script handles which this script depends on.
+	 * @return object
+	 */
+	public function set_dependencies( $deps ) {
+		$this->item[ $this->id ]['deps'] = $deps;
+		return $this;
+	}
+
+	/**
+	 * Put the script inside head tag
+	 *
+	 * @return object
+	 */
+	public function put_on_header() {
+		$this->item[ $this->id ]['in_footer'] = false;
+		return $this;
+	}
+
+	/**
+	 * Put the script before the closing body tag
+	 *
+	 * @return object
+	 */
+	public function put_on_footer() {
+		$this->item[ $this->id ]['in_footer'] = true;
+		return $this;
+	}
+
+	/**
+	 * Set the script version
+	 *
+	 * @param string $ver String specifying script version number.
+	 * @return object
+	 */
+	public function set_version( $ver ) {
+		$this->item[ $this->id ]['ver'] = $ver;
+		return $this;
+	}
+
+	/**
+	 * Localize global object to the script
+	 *
+	 * @param array $array Array of object name & object value. Object value can be either a single or multi-dimensional array.
+	 * @return object
+	 */
+	public function set_global_object( $array ) {
+		$this->item[ $this->id ]['localize'] = [
+			'name'  => $array['name'],
+			'value' => $array['value'],
+		];
+
+		return $this;
+	}
+
+	/**
+	 * Register the script to WP
+	 *
+	 * @return void
+	 */
+	public function save() {
+		$url       = $this->item[ $this->id ]['url'];
+		$handle    = $this->item[ $this->id ]['name'];
+		$deps      = isset( $this->item[ $this->id ]['deps'] ) ? $this->item[ $this->id ]['deps'] : [];
+		$ver       = isset( $this->item[ $this->id ]['ver'] ) ? $this->item[ $this->id ]['ver'] : null;
+		$ver       = $ver && 'auto' === $ver ? Asset::get_modified_time( $url ) : $ver;
+		$in_footer = isset( $this->item[ $this->id ]['in_footer'] ) ? $this->item[ $this->id ]['in_footer'] : true; // put default to footer for non-blocking request.
+		$localize  = isset( $this->item[ $this->id ]['localize'] ) ? $this->item[ $this->id ]['localize'] : false;
+
+		wp_register_script( $handle, $url, $deps, $ver, $in_footer );
+
+		if ( $localize ) {
+			wp_localize_script(
+				$this->item[ $this->id ]['name'],
+				$this->item[ $this->id ]['localize']['name'],
+				$this->item[ $this->id ]['localize']['value']
+			);
+		}
+	}
+
+	/**
+	 * Enqueue the script
+	 *
+	 * @param string $handle Name of the script. Should be unique.
+	 * @return void
+	 */
+	public function enqueue( $handle = false ) {
+		if ( $handle ) {
+			wp_enqueue_script( $handle );
+		} else {
+			$this->save();
+			wp_enqueue_script( $this->item[ $this->id ]['name'] );
+		}
+	}
+}
diff --git a/helpers/class-metabox-helper.php b/helpers/class-metabox-helper.php
new file mode 100644
index 0000000..2a0f94c
--- /dev/null
+++ b/helpers/class-metabox-helper.php
@@ -0,0 +1,161 @@
+<?php
+/**
+ * Metabox interfaces
+ *
+ * @package WPFW
+ */
+
+/**
+ * Class to provide metabox utilities
+ */
+class Metabox_Helper {
+
+	/**
+	 * Item's id
+	 *
+	 * @var integer
+	 */
+	private $id = -1;
+
+	/**
+	 * Item's container
+	 *
+	 * @var array
+	 */
+	private $item = [];
+
+	/**
+	 * Register metabox id
+	 *
+	 * @param string $name The metabox id.
+	 * @return object
+	 */
+	public function register( $name ) {
+		$this->id++;
+		$this->item[ $this->id ]         = [];
+		$this->item[ $this->id ]['name'] = $name;
+
+		return $this;
+	}
+
+	/**
+	 * Set the metabox title
+	 *
+	 * @param string $title Title of the meta box.
+	 * @return object
+	 */
+	public function set_title( $title ) {
+		$this->item[ $this->id ]['title'] = $title;
+		return $this;
+	}
+
+	/**
+	 * Display callback
+	 *
+	 * @param callable $display_callback Function that fills the box with the desired content. The function should echo its output.
+	 * @return object
+	 */
+	public function render_display( $display_callback ) {
+		$this->item[ $this->id ]['display_callback'] = $display_callback;
+		return $this;
+	}
+
+	/**
+	 * Add metabox to specific screen
+	 *
+	 * @param string|array|WP_Screen $screen The screen(s) on which to show the box.
+	 * @return object
+	 */
+	public function add_to_screen( $screen ) {
+		$this->item[ $this->id ]['screen'] = $screen;
+		return $this;
+	}
+
+	/**
+	 * Set screen where the boxes should be displayed
+	 *
+	 * @param string $screen_context The context within the screen ('normal', 'side', 'advanced').
+	 * @return object
+	 */
+	public function set_screen_context( $screen_context = 'advanced' ) {
+		$this->item[ $this->id ]['screen_context'] = $screen_context;
+		return $this;
+	}
+
+	/**
+	 * Set the screen context's priority where the boxes should show
+	 *
+	 * @param string $context_priority The priority within the context ('high', 'default', 'low').
+	 * @return object
+	 */
+	public function set_context_priority( $context_priority = 'default' ) {
+		$this->item[ $this->id ]['context_priority'] = $context_priority;
+		return $this;
+	}
+
+	/**
+	 * Set callback arguments
+	 *
+	 * @param array $callback_args Data that should be set as the $args property of the box array (which is the second parameter passed to the render_display).
+	 * @return object
+	 */
+	public function set_callback_args( $callback_args = null ) {
+		$this->item[ $this->id ]['callback_args'] = $args;
+		return $this;
+	}
+
+	/**
+	 * Collect the arguments then add them to the metabox
+	 *
+	 * @return object
+	 */
+	public function save() {
+		$name             = $this->item[ $this->id ]['name'];
+		$title            = $this->item[ $this->id ]['title'];
+		$display_callback = $this->item[ $this->id ]['display_callback'];
+		$screen           = $this->item[ $this->id ]['screen'];
+		$screen_context   = isset( $this->item[ $this->id ]['screen_context'] ) ? $this->item[ $this->id ]['screen_context'] : 'advanced';
+		$context_priority = isset( $this->item[ $this->id ]['context_priority'] ) ? $this->item[ $this->id ]['context_priority'] : 'default';
+		$callback_args    = isset( $this->item[ $this->id ]['callback_args'] ) ? $this->item[ $this->id ]['callback_args'] : null;
+
+		add_meta_box(
+			$name,
+			$title,
+			$display_callback,
+			$screen,
+			$screen_context,
+			$context_priority,
+			$callback_args
+		);
+
+		return $this;
+	}
+
+	/**
+	 * Provide callback when processing the submission
+	 *
+	 * @param callable $submission_callback The function/ method to be called using 'save_post', or custom hook.
+	 * @param string   $submission_hook The hook where $onsave_callback is called.
+	 * @return object
+	 */
+	public function set_submission_callback( $submission_callback, $submission_hook = 'save_post' ) {
+		$this->item[ $this->id ]['submission_callback'] = $submission_callback;
+		$this->item[ $this->id ]['submission_hook']     = $submission_hook;
+		return $this;
+	}
+
+	/**
+	 * Add the metabox
+	 *
+	 * @param string $hook The hook which the metabox will be registered in. E.g: 'add_meta_boxes', 'load-nav-menus.php'.
+	 * @return void
+	 */
+	public function add( $hook = 'add_meta_boxes' ) {
+		add_action( $hook, [ $this, 'save' ] );
+		$item = $this->item[ $this->id ];
+
+		if ( isset( $item['submission_callback'] ) && $item['submission_callback'] ) {
+			add_action( $item['submission_hook'], $item['submission_callback'] );
+		}
+	}
+}
diff --git a/helpers/class-post-type-helper.php b/helpers/class-post-type-helper.php
new file mode 100644
index 0000000..4dd4137
--- /dev/null
+++ b/helpers/class-post-type-helper.php
@@ -0,0 +1,351 @@
+<?php
+/**
+ * Post type interfaces
+ *
+ * @package WPFW
+ */
+
+namespace Wpfw\Helpers;
+
+/**
+ * Class to provide metabox utilities
+ */
+class Post_Type_Helper {
+
+	/**
+	 * Item's id
+	 *
+	 * @var integer
+	 */
+	private $id = -1;
+
+	/**
+	 * Item's container
+	 *
+	 * @var array
+	 */
+	private $item = [];
+
+	/**
+	 * Available argument's keys
+	 * Not used in this class, but used as helper when writing methods
+	 *
+	 * @var array
+	 */
+	private $args_keys = [
+		'label',
+		'labels',
+		'description',
+		'public',
+		'hierarchical',
+		'exclude_from_search',
+		'publicly_queryable',
+		'show_ui',
+		'show_in_menu',
+		'show_in_nav_menus',
+		'show_in_admin_bar',
+		'show_in_rest',
+		'rest_base',
+		'rest_controller_class',
+		'menu_position',
+		'menu_icon',
+		'capability_type',
+		'capabilities',
+		'map_meta_cap',
+		'supports',
+		'register_meta_box_cb',
+		'taxonomies',
+		'has_archive',
+		'rewrite',
+		'query_var',
+		'can_export',
+		'delete_with_user',
+		'_builtin',
+		'_edit_link',
+	];
+
+	/**
+	 * Register post type name
+	 *
+	 * @param string $singular_name The singular name.
+	 * @param string $plural_name The plural name.
+	 * @return object
+	 */
+	public function register( $singular_name, $plural_name = '' ) {
+		$plural_name = $plural_name ? $plural_name : $singular_name . 's';
+
+		$this->id++;
+		$this->item[ $this->id ] = [];
+
+		$this->item[ $this->id ]['args']           = [];
+		$this->item[ $this->id ]['args']['labels'] = [];
+		$this->item[ $this->id ]['singular_name']  = $singular_name;
+		$this->item[ $this->id ]['plural_name']    = $plural_name;
+
+		return $this;
+	}
+
+	/**
+	 * Set the post type key
+	 * This is the 1st parameter in "register_post_type" function.
+	 *
+	 * @param string $post_type_key The post type key.
+	 * @return object
+	 */
+	public function set_id( $post_type_key ) {
+		$this->item[ $this->id ]['post_type_key'] = $post_type_key;
+		return $this;
+	}
+
+	/**
+	 * Set "labels" args
+	 *
+	 * @param array $array Array of labels.
+	 * @return object
+	 */
+	public function set_labels( $array = [] ) {
+		if ( ! $array ) {
+			return $this;
+		}
+
+		foreach ( $array as $key => $value ) {
+			$this->item[ $this->id ]['args']['labels'][ $key ] = $value;
+		}
+
+		return $this;
+	}
+
+	/**
+	 * Set the post type description
+	 *
+	 * @param string $description Post type description.
+	 * @return object
+	 */
+	public function set_description( $description ) {
+		$this->item[ $this->id ]['args']['description'] = $description;
+		return $this;
+	}
+
+	/**
+	 * Set "public" args as true
+	 *
+	 * @param boolean $is_public Whether to set the "public" args true or false.
+	 * @return object
+	 */
+	public function set_public( $is_public = true ) {
+		$this->item[ $this->id ]['args']['public'] = $is_public;
+		return $this;
+	}
+
+	/**
+	 * Set "public" args as false
+	 *
+	 * @return object
+	 */
+	public function set_private() {
+		$this->item[ $this->id ]['args']['public'] = false;
+		return $this;
+	}
+
+	/**
+	 * Set the "hierarchical" args
+	 *
+	 * @param boolean $hierarchical Whether the post type is hierarchical (e.g. page).
+	 * @return object
+	 */
+	public function set_hierarchical( $hierarchical = true ) {
+		$this->item[ $this->id ]['args']['hierarchical'] = $hierarchical;
+		return $this;
+	}
+
+	/**
+	 * Set "show_ui" args as true
+	 *
+	 * @param boolean $is_shown Whether to set the "show_ui" args true or false.
+	 * @return object
+	 */
+	public function show_ui( $is_shown = true ) {
+		$this->item[ $this->id ]['args']['show_ui'] = $is_shown;
+		return $this;
+	}
+
+	/**
+	 * Set "show_ui" args as false
+	 *
+	 * @return object
+	 */
+	public function hide_ui() {
+		$this->item[ $this->id ]['args']['show_ui'] = false;
+		return $this;
+	}
+
+	/**
+	 * Set "show_in_menu" args as true
+	 *
+	 * @param boolean $is_shown Whether to set the "show_in_menu" args true or false.
+	 * @return object
+	 */
+	public function show_in_menu( $is_shown = true ) {
+		$this->item[ $this->id ]['args']['show_in_menu'] = $is_shown;
+		return $this;
+	}
+
+	/**
+	 * Set "show_in_menu" args as false
+	 *
+	 * @return object
+	 */
+	public function hide_from_menu() {
+		$this->item[ $this->id ]['args']['show_in_menu'] = false;
+		return $this;
+	}
+
+	/**
+	 * Set the "supports" args
+	 *
+	 * @param array $supports Core feature(s) the post type supports.
+	 * @return object
+	 */
+	public function set_supports( $supports ) {
+		$this->item[ $this->id ]['args']['supports'] = $supports;
+		return $this;
+	}
+
+	/**
+	 * Set the "menu_icon" args
+	 *
+	 * @param string $icon The url to the icon to be used for this menu.
+	 * @return object
+	 */
+	public function set_icon( $icon ) {
+		$this->item[ $this->id ]['args']['menu_icon'] = $icon;
+		return $this;
+	}
+
+	/**
+	 * Set "has_archive" args to true
+	 *
+	 * @return object
+	 */
+	public function enable_archive() {
+		$this->item[ $this->id ]['args']['has_archive'] = true;
+		return $this;
+	}
+
+	/**
+	 * Set "has_archive" args to false
+	 *
+	 * @return object
+	 */
+	public function disable_archive() {
+		$this->item[ $this->id ]['args']['has_archive'] = false;
+		return $this;
+	}
+
+	/**
+	 * Set argument using key, value as param
+	 *
+	 * @param string $arg_name The argument name.
+	 * @param mixed  $arg_value The argument value.
+	 * @return object
+	 */
+	public function set_argument( $arg_name, $arg_value ) {
+		$this->item[ $this->id ]['args'][ $arg_name ] = $arg_value;
+		return $this;
+	}
+
+	/**
+	 * Set arguments using array of key-value pair
+	 *
+	 * @param array $args The arguments (key-value pair).
+	 * @return object
+	 */
+	public function set_arguments( $args ) {
+		if ( ! $args ) {
+			return;
+		}
+		if ( ! is_array( $args ) ) {
+			return;
+		}
+
+		foreach ( $args as $arg_name => $arg_value ) {
+			$this->setArgument( $arg_name, $arg_value );
+		}
+
+		return $this;
+	}
+
+	/**
+	 * Set admin menu name
+	 * Part of "labels" args
+	 *
+	 * @param string $menu_name Label for the menu name.
+	 * @return object
+	 */
+	public function set_menu_name( $menu_name ) {
+		$this->item[ $this->id ]['menu_name'] = $menu_name;
+		return $this;
+	}
+
+	/**
+	 * Collect the arguments
+	 *
+	 * @return void
+	 */
+	public function save() {
+		$item          = $this->item[ $this->id ];
+		$singular_name = $item['singular_name'];
+		$plural_name   = $item['plural_name'];
+		$post_type_key = isset( $item['post_type_key'] ) ? $item['post_type_key'] : strtolower( str_replace( ' ', '_', $singular_name ) );
+		$menu_name     = isset( $item['menu_name'] ) ? $item['menu_name'] : $plural_name;
+
+		$args   = $this->item[ $this->id ]['args'];
+		$labels = [
+			'name'                  => $plural_name,
+			'singular_name'         => $singular_name,
+			'add_new'               => 'Add New',
+			'add_new_item'          => 'Add New ' . $singular_name,
+			'edit_item'             => 'Edit ' . $singular_name,
+			'new_item'              => 'New ' . $singular_name,
+			'view_item'             => 'View ' . $singular_name,
+			'view_items'            => 'View ' . $plural_name,
+			'search_items'          => 'Search ' . $plural_name,
+			'name_admin_bar'        => $singular_name,
+			'not_found'             => 'Nothing found',
+			'not_found_in_trash'    => 'Nothing found in Trash',
+			'parent_item_colon'     => '',
+			'all_items'             => 'All ' . $plural_name,
+			'archives'              => $singular_name . ' Archives',
+			'attributes'            => $singular_name . ' Attributes',
+			'insert_into_item '     => 'Insert into ' . $singular_name,
+			'uploaded_to_this_item' => 'Uploaded to this ' . $singular_name,
+			'menu_name'             => $menu_name,
+			'filter_items_list'     => 'Filter' . $plural_name . 'list',
+			'items_list_navigation' => $plural_name . ' list navigation',
+			'items_list'            => $plural_name . ' list',
+		];
+
+		if ( $args['labels'] ) {
+			foreach ( $args['labels'] as $key => $value ) {
+				if ( $args['labels'][ $key ] ) {
+					$labels[ $key ] = $value;
+				}
+			}
+		}
+
+		unset( $args['labels'] );
+		$args['labels'] = $labels;
+
+		register_post_type( $post_type_key, $args );
+	}
+
+	/**
+	 * Add the post type
+	 *
+	 * @param string $hook The hook used to register the post type.
+	 * @return void
+	 */
+	public function add( $hook = 'init' ) {
+		add_action( $hook, [ $this, 'save' ] );
+	}
+}
diff --git a/helpers/class-taxonomy-helper.php b/helpers/class-taxonomy-helper.php
new file mode 100644
index 0000000..2fe1408
--- /dev/null
+++ b/helpers/class-taxonomy-helper.php
@@ -0,0 +1,276 @@
+<?php
+/**
+ * Taxonomy interfaces
+ *
+ * @package WPFW
+ */
+
+namespace Wpfw\Helpers;
+
+/**
+ * Class to provide taxonomy utilities
+ */
+class Taxonomy_Helper {
+
+	/**
+	 * Item's id
+	 *
+	 * @var integer
+	 */
+	private $id = -1;
+
+	/**
+	 * Item's container
+	 *
+	 * @var array
+	 */
+	private $item = [];
+
+	/**
+	 * Register taxonomy name
+	 *
+	 * @param string $singular_name The singular name.
+	 * @param string $plural_name The plural name.
+	 * @return object
+	 */
+	public function register( $singular_name, $plural_name = '' ) {
+		$plural_name = $plural_name ? $plural_name : $singular_name . 's';
+
+		$this->id++;
+		$this->item[ $this->id ] = [];
+
+		$this->item[ $this->id ]['object_type']    = 'post';
+		$this->item[ $this->id ]['args']           = [];
+		$this->item[ $this->id ]['args']['labels'] = [];
+		$this->item[ $this->id ]['singular_name']  = $singular_name;
+		$this->item[ $this->id ]['plural_name']    = $plural_name;
+
+		return $this;
+	}
+
+	/**
+	 * Set the taxonomy type key
+	 * This is the 1st parameter in "register_taxonomy" function.
+	 *
+	 * @param string $tax_key The taxonomy key.
+	 * @return object
+	 */
+	public function set_id( $tax_key ) {
+		$this->item[ $this->id ]['tax_key'] = $tax_key;
+		return $this;
+	}
+
+	/**
+	 * Set "labels" args
+	 *
+	 * @param array $array Array of labels.
+	 * @return object
+	 */
+	public function set_labels( $array = [] ) {
+		if ( ! $array ) {
+			return $this;
+		}
+
+		foreach ( $array as $key => $value ) {
+			$this->item[ $this->id ]['args']['labels'][ $key ] = $value;
+		}
+
+		return $this;
+	}
+
+	/**
+	 * Set the taxonomy description
+	 *
+	 * @param string $description Taxonomy description.
+	 * @return object
+	 */
+	public function set_description( $description ) {
+		$this->item[ $this->id ]['args']['description'] = $description;
+		return $this;
+	}
+
+	/**
+	 * Set "public" args as true
+	 *
+	 * @param boolean $is_public Whether to set the "public" args true or false.
+	 * @return object
+	 */
+	public function set_public( $is_public = true ) {
+		$this->item[ $this->id ]['args']['public'] = $is_public;
+		return $this;
+	}
+
+	/**
+	 * Set "public" args as false
+	 *
+	 * @return object
+	 */
+	public function set_private() {
+		$this->item[ $this->id ]['args']['public'] = false;
+		return $this;
+	}
+
+	/**
+	 * Set the "hierarchical" args
+	 *
+	 * @param boolean $hierarchical Whether the post type is hierarchical (e.g. page).
+	 * @return object
+	 */
+	public function set_hierarchical( $hierarchical = true ) {
+		$this->item[ $this->id ]['args']['hierarchical'] = $hierarchical;
+		return $this;
+	}
+
+	/**
+	 * Set "show_ui" args as true
+	 *
+	 * @param boolean $is_shown Whether to set the "show_ui" args true or false.
+	 * @return object
+	 */
+	public function show_ui( $is_shown = true ) {
+		$this->item[ $this->id ]['args']['show_ui'] = $is_shown;
+		return $this;
+	}
+
+	/**
+	 * Set "show_ui" args as false
+	 *
+	 * @return object
+	 */
+	public function hide_ui() {
+		$this->item[ $this->id ]['args']['show_ui'] = false;
+		return $this;
+	}
+
+	/**
+	 * Set "show_admin_column" args as true
+	 *
+	 * @param boolean $is_shown Whether to set the "show_admin_column" args true or false.
+	 * @return object
+	 */
+	public function show_admin_column( $is_shown = true ) {
+		$this->item[ $this->id ]['args']['show_admin_column'] = $is_shown;
+		return $this;
+	}
+
+	/**
+	 * Set "show_admin_column" args as false
+	 *
+	 * @return object
+	 */
+	public function hide_admin_column() {
+		$this->item[ $this->id ]['args']['show_admin_column'] = false;
+		return $this;
+	}
+
+	/**
+	 * Set argument using key, value as param
+	 *
+	 * @param string $arg_name The argument name.
+	 * @param mixed  $arg_value The argument value.
+	 * @return object
+	 */
+	public function set_argument( $arg_name, $arg_value ) {
+		$this->item[ $this->id ]['args'][ $arg_name ] = $arg_value;
+		return $this;
+	}
+
+	/**
+	 * Set arguments using array of key-value pair
+	 *
+	 * @param array $args The arguments (key-value pair).
+	 * @return object
+	 */
+	public function set_arguments( $args ) {
+		if ( ! $args ) {
+			return;
+		}
+		if ( ! is_array( $args ) ) {
+			return;
+		}
+
+		foreach ( $args as $arg_name => $arg_value ) {
+			$this->setArgument( $arg_name, $arg_value );
+		}
+
+		return $this;
+	}
+
+	/**
+	 * Set admin menu name
+	 * Part of "labels" args
+	 *
+	 * @param string $menu_name Label for the menu name.
+	 * @return object
+	 */
+	public function set_menu_name( $menu_name ) {
+		$this->item[ $this->id ]['menu_name'] = $menu_name;
+		return $this;
+	}
+
+	/**
+	 * Collect the arguments
+	 *
+	 * @return void
+	 */
+	public function save() {
+		$item          = $this->item[ $this->id ];
+		$singular_name = $item['singular_name'];
+		$plural_name   = $item['plural_name'];
+		$tax_key       = isset( $item['tax_key'] ) ? $item['tax_key'] : strtolower( str_replace( ' ', '_', $singular_name ) );
+		$object_type   = $item['object_type'];
+		$current_args  = $item['args'];
+		$menu_name     = isset( $item['menu_name'] ) ? $item['menu_name'] : $plural_name;
+
+		$args   = $item['args'];
+		$labels = [
+			'name'              => $plural_name,
+			'singular_name'     => $singular_name,
+			'search_items'      => 'Search ' . $plural_name,
+			'all_items'         => 'All ' . $plural_name,
+			'parent_item'       => 'Parent ' . $singular_name,
+			'parent_item_colon' => 'Parent ' . $singular_name . ' :',
+			'edit_item'         => 'Edit ' . $singular_name,
+			'update_item'       => 'Update ' . $singular_name,
+			'add_new_item'      => 'Add New ' . $singular_name,
+			'new_item_name'     => 'New ' . $singular_name . ' Name',
+			'menu_name'         => $menu_name,
+		];
+
+		if ( $args['labels'] ) {
+			foreach ( $args['labels'] as $key => $value ) {
+				if ( $args['labels'][ $key ] ) {
+					$labels[ $key ] = $value;
+				}
+			}
+		}
+
+		unset( $args['labels'] );
+		$args['labels'] = $labels;
+
+		register_taxonomy( $tax_key, $object_type, $args );
+	}
+
+	/**
+	 * Add to object type
+	 *
+	 * @param string|array $object_type Object type or array of object types with which the taxonomy should be associated.
+	 * @param string       $hook The hook which taxonomy will be added in.
+	 * @return void
+	 */
+	public function add_to_object_type( $object_type, $hook = 'init' ) {
+		$this->item[ $this->id ]['object_type'] = $object_type;
+		add_action( $hook, [ $this, 'save' ] );
+	}
+
+	/**
+	 * Beautiful alias for "add_to_object_type"
+	 *
+	 * @param string|array $object_type Object type or array of object types with which the taxonomy should be associated.
+	 * @param string       $hook The hook which taxonomy will be added in.
+	 * @return void
+	 */
+	public function add_to_post_type( $object_type, $hook = 'init' ) {
+		$this->add_to_object_type( $object_type, $hook );
+	}
+}
diff --git a/utilities/class-admin-ajax.php b/utilities/class-admin-ajax.php
new file mode 100644
index 0000000..a399e22
--- /dev/null
+++ b/utilities/class-admin-ajax.php
@@ -0,0 +1,37 @@
+<?php
+/**
+ * Admin Ajax statical interface
+ *
+ * @package WPFW
+ */
+
+namespace Wpfw;
+
+use Wpfw\Helpers\Admin_Ajax_Helper;
+
+/**
+ * Class to manage statical interface of admin ajax
+ */
+class Admin_Ajax {
+
+	/**
+	 * Register admin ajax
+	 *
+	 * @param string $action The action to be registered to wp_ajax_ .
+	 * @return object
+	 */
+	public static function register( $action ) {
+		$object = new Admin_Ajax_Helper();
+		return $object->register( $action );
+	}
+
+	/**
+	 * Beautiful alias for "register"
+	 *
+	 * @param string $action The action to be registered to wp_ajax_ .
+	 * @return object
+	 */
+	public static function make( $action ) {
+		return self::register( $action );
+	}
+}
diff --git a/utilities/class-asset.php b/utilities/class-asset.php
new file mode 100644
index 0000000..43ba095
--- /dev/null
+++ b/utilities/class-asset.php
@@ -0,0 +1,97 @@
+<?php
+/**
+ * Asset's utility
+ *
+ * @package WPFW
+ */
+
+namespace Wpfw;
+
+/**
+ * Automatically generate file name based on last modified time.
+ *
+ * E.g:
+ * Asset::auto_version('css/style.css');
+ * will generate something like 'css/style.1530734078.css'
+ * The random number is the last modified time
+ *
+ * What is this for?
+ * Sometimes we need to cache static assets for faster load speed via .htaccess
+ * The static assets like css & js will be cached
+ * The problem is, when those files are edited/ modified, they are still cached until user refreshes or even hard-reloads the page
+ *
+ * To solve it, this method adds "last modified time" before the extension
+ * It could be like functions.1530734078.js or style.1530734078.css
+ * (To make this work, we sill need to add a snippet to htaccess)
+ *
+ * This way, static assets will be cached AND no need to worry when you edit the file content
+ * because it's auto renamed now :)
+ *
+ * But we need to insert some codes to htaccess
+ * And apache-nginx based (like WP Engine) doesn't directly-support those codes
+ */
+class Asset {
+
+	/**
+	 * Auto versioning the asset.
+	 * Not directly-supported in WP Engine.
+	 *
+	 * @param string $url Url of the asset.
+	 * @return string
+	 */
+	public static function auto_version( $url ) {
+		$site_url = get_site_url();
+
+		if ( strpos( $url, $site_url ) === false ) {
+			return $url;
+		}
+
+		$dir  = str_replace( $site_url . '/', ABSPATH, $url );
+		$path = $dir;
+
+		if ( ! file_exists( $dir ) ) {
+			// phpcs:ignore
+			trigger_error( esc_html( "The file $dir does not exist" ), E_USER_WARNING );
+			return $url;
+		}
+
+		$ver  = '.' . date( 'YmdHis', filemtime( $dir ) );
+		$path = pathinfo( $path );
+		$name = $path['basename'];
+		$arr  = explode( '.', $name );
+		$end  = end( $arr );
+		$file = str_replace( '.' . $end, $ver . '.' . $end, $name );
+
+		$output = $path['dirname'] . '/' . $file;
+		$output = str_replace( ABSPATH, '', $output );
+		$output = $site_url . '/' . $output;
+
+		clearstatcache();
+
+		return $output;
+	}
+
+	/**
+	 * Get last modified time
+	 *
+	 * @param string $url Url of the asset.
+	 * @return string Last modified time.
+	 */
+	public static function get_modified_time( $url ) {
+		$site_url = get_site_url();
+		$base_dir = rtrim( ABSPATH, '/' );
+
+		if ( strpos( $url, $site_url ) === false ) {
+			return false;
+		}
+		$dir = str_replace( $site_url, $base_dir, $url );
+
+		if ( ! file_exists( $dir ) ) {
+			// phpcs:ignore
+			trigger_error( esc_html( "The file $dir does not exist" ), E_USER_WARNING );
+			return $url;
+		}
+
+		return date( 'YmdHis', filemtime( $dir ) );
+	}
+}
diff --git a/utilities/class-css.php b/utilities/class-css.php
new file mode 100644
index 0000000..a1f38e5
--- /dev/null
+++ b/utilities/class-css.php
@@ -0,0 +1,37 @@
+<?php
+/**
+ * CSS enqueue statical interface
+ *
+ * @package WPFW
+ */
+
+namespace Wpfw;
+
+use Wpfw\Helpers\CSS_Helper;
+
+/**
+ * Class to manage statical interface of style enqueue
+ */
+class CSS {
+
+	/**
+	 * Register a stylesheet
+	 *
+	 * @param string $handle Name of the stylesheet. Should be unique.
+	 * @return object Chaining css enqueue methods.
+	 */
+	public static function register( $handle ) {
+		$object = new CSS_Helper();
+		return $object->register( $handle );
+	}
+
+	/**
+	 * Enqueue a stylesheet
+	 *
+	 * @param string $handle Name of the stylesheet. Should be unique.
+	 * @return void
+	 */
+	public static function enqueue( $handle ) {
+		wp_enqueue_style( $handle );
+	}
+}
diff --git a/utilities/class-debug.php b/utilities/class-debug.php
new file mode 100644
index 0000000..45d6809
--- /dev/null
+++ b/utilities/class-debug.php
@@ -0,0 +1,60 @@
+<?php
+/**
+ * Debugging utility
+ *
+ * @package WPFW
+ */
+
+namespace Wpfw;
+
+/**
+ * Class to provide debugging utility
+ *
+ * Many operations are phpcs-ignored, because this class is just providing debugging utility,
+ * not calling/ initializing directly
+ */
+class Debug {
+
+	/**
+	 * Readable var_dump
+	 *
+	 * @param mixed  $var The variable to be dumped.
+	 * @param string $mode Var dump or print_r.
+	 * @return void
+	 */
+	public static function dump( $var, $mode = 'var_dump' ) {
+		echo '<pre>'; // phpcs:ignore
+		if ( 'var_dump' === $mode ) {
+			var_dump( $var ); // phpcs:ignore
+		} elseif ( 'print_r' === $mode ) {
+			print_r($var); // phpcs:ignore
+		}
+		echo '</pre>'; // phpcs:ignore
+	}
+
+	/**
+	 * Print variable as JSON
+	 *
+	 * @param mixed $var The variable to be printed.
+	 * @return void
+	 */
+	public static function print_as_json( $var ) {
+		$var = wp_json_encode( $var, JSON_PRETTY_PRINT );
+		echo '<pre>'; // phpcs:ignore
+		echo $var; // phpcs:ignore
+		echo '</pre>'; // phpcs:ignore
+	}
+
+	/**
+	 * Log the variable
+	 *
+	 * @todo Handle the $file param
+	 *
+	 * @param mixed   $var The variable to be logged.
+	 * @param boolean $file Whether to log it tp debug.log or custom file location.
+	 * @return void
+	 */
+	public static function log( $var, $file = false ) {
+		error_log( print_r( $var, true ) ); // phpcs:ignore
+	}
+}
diff --git a/utilities/class-file-util.php b/utilities/class-file-util.php
new file mode 100644
index 0000000..5703f63
--- /dev/null
+++ b/utilities/class-file-util.php
@@ -0,0 +1,87 @@
+<?php
+/**
+ * File helper statical interface
+ *
+ * @package WPFW
+ */
+
+namespace Wpfw;
+
+use Wpfw\Helpers\File_Helper;
+
+/**
+ * Class to manage statical interface of file helper
+ */
+class File_Util {
+
+	/**
+	 * Copy file to specific destination
+	 *
+	 * @param string  $source The source path.
+	 * @param string  $dest The destination path.
+	 * @param integer $permissions The file permission.
+	 * @return bool
+	 */
+	public static function copy( $source, $dest, $permissions = 0755 ) {
+		$object = new File_Helper();
+		return $object->copy( $source, $dest, $permissions );
+	}
+
+	/**
+	 * Remove the whole directory
+	 *
+	 * @param string $dir The directory path.
+	 * @return bool
+	 */
+	public static function remove_dir( $dir ) {
+		$object = new File_Helper();
+		return $object->remove_dir( $dir );
+	}
+
+	/**
+	 * Empty a directory
+	 *
+	 * @param string $dir The directory path.
+	 * @return void
+	 */
+	public static function empty_dir( $dir ) {
+		$object = new File_Helper();
+		$object->empty_dir( $dir );
+	}
+
+	/**
+	 * Load components
+	 *
+	 * @param string  $dir The directory path.
+	 * @param integer $max_depth Maximum depth to load the components.
+	 * @return void
+	 */
+	public static function load_components( $dir, $max_depth = 1 ) {
+		$object = new File_Helper();
+		$object->load_components( $dir, $max_depth );
+	}
+
+	/**
+	 * Include all files in specific directory
+	 *
+	 * @param string  $dir The directory path.
+	 * @param integer $max_depth Maximum depth to include.
+	 * @return void
+	 */
+	public static function include_all( $dir, $max_depth = 1 ) {
+		$object = new File_Helper();
+		$object->include_all( $dir, $max_depth );
+	}
+
+	/**
+	 * Require all files in specific directory
+	 *
+	 * @param string  $dir The directory path.
+	 * @param integer $max_depth Maximum depth to require.
+	 * @return void
+	 */
+	public static function require_all( $dir, $max_depth = 1 ) {
+		$object = new File_Helper();
+		$object->require_all( $dir, $max_depth );
+	}
+}
diff --git a/utilities/class-image-size.php b/utilities/class-image-size.php
new file mode 100644
index 0000000..b920c5d
--- /dev/null
+++ b/utilities/class-image-size.php
@@ -0,0 +1,27 @@
+<?php
+/**
+ * CSS enqueue statical interface
+ *
+ * @package WPFW
+ */
+
+namespace Wpfw;
+
+use Wpfw\Helpers\Image_Size_Helper;
+
+/**
+ * Class to manage statical interface of style enqueue
+ */
+class Image_Size {
+
+	/**
+	 * Register image size
+	 *
+	 * @param string $size_name Image size identifier.
+	 * @return object
+	 */
+	public static function register( $size_name ) {
+		$object = new Image_Size_Helper();
+		return $object->register( $size_name );
+	}
+}
diff --git a/utilities/class-js.php b/utilities/class-js.php
new file mode 100644
index 0000000..896ca0e
--- /dev/null
+++ b/utilities/class-js.php
@@ -0,0 +1,108 @@
+<?php
+/**
+ * JS enqueue statical interface
+ *
+ * @package WPFW
+ */
+
+namespace Wpfw;
+
+use Wpfw\Helpers\JS_Helper;
+
+/**
+ * Class to manage statical interface of script enqueue
+ */
+class JS {
+
+	/**
+	 * Register a script
+	 *
+	 * @param string $handle Name of the script. Should be unique.
+	 * @return object Chaining js enqueue methods.
+	 */
+	public static function register( $handle ) {
+		$object = new JS_Helper();
+		return $object->register( $handle );
+	}
+
+	/**
+	 * Localize global object to a specific script
+	 * Wrapper for wp_localize_script
+	 *
+	 * @param string $handle Script handle which the data will be attached to.
+	 * @param string $object_name Name for the JavaScript object.
+	 * @param array  $object_value The data which can be either a single or multi-dimensional array.
+	 * @return void
+	 */
+	public static function localize_global_object( $handle, $object_name, $object_value ) {
+		wp_localize_script( $handle, $object_name, $object_value );
+	}
+
+	/**
+	 * Add global object to a specific script
+	 * Wrapper for wp_localize_script
+	 *
+	 * @param string $handle Script handle which the data will be attached to.
+	 * @param string $object_name Name for the JavaScript object.
+	 * @param array  $object_value The data which can be either a single or multi-dimensional array.
+	 * @return void
+	 */
+	public static function add_global_object( $handle, $object_name, $object_value ) {
+		wp_localize_script( $handle, $object_name, $object_value );
+	}
+
+	/**
+	 * Output global object instead of localizing it to specific script
+	 *
+	 * @see See https://developer.wordpress.org/reference/classes/wp_scripts/localize/
+	 *
+	 * @param string $object_name Name for the JavaScript object.
+	 * @param array  $object_value The data which can be either a single or multi-dimensional array.
+	 * @return void
+	 */
+	public static function print_global_object( $object_name, $object_value ) {
+		foreach ( $object_value as $key => $value ) {
+			if ( ! is_scalar( $value ) ) {
+				continue;
+			}
+			$object_value[ $key ] = html_entity_decode( (string) $value, ENT_QUOTES, 'UTF-8' );
+		}
+
+		$script  = '<script>';
+		$script .= "var $object_name = " . wp_json_encode( $object_value ) . ';';
+		$script .= '</script>';
+
+		// phpcs:ignore
+		echo $script;
+	}
+
+	/**
+	 * Enqueue a script
+	 *
+	 * @param string $handle Name of the script. Should be unique.
+	 * @return void
+	 */
+	public static function enqueue( $handle ) {
+		wp_enqueue_script( $handle );
+	}
+
+	/**
+	 * Deregister a script.
+	 *
+	 * @param string $handle Name of the script to be deregistered.
+	 * @return void
+	 */
+	public static function deregister( $handle ) {
+		wp_deregister_script( $handle );
+	}
+
+	/**
+	 * Dequeue a script.
+	 *
+	 * @param string $handle Name of the script to be de-queued.
+	 * @return void
+	 */
+	public static function dequeue( $handle ) {
+		wp_dequeue_script( $handle );
+	}
+}
diff --git a/utilities/class-metabox.php b/utilities/class-metabox.php
new file mode 100644
index 0000000..6071c66
--- /dev/null
+++ b/utilities/class-metabox.php
@@ -0,0 +1,37 @@
+<?php
+/**
+ * Metabox utility
+ *
+ * @package WPFW
+ */
+
+namespace Wpfw;
+
+use Wpfw\Helpers\Metabox_Helper;
+
+/**
+ * Class to manage metabox utility
+ */
+class Metabox {
+
+	/**
+	 * Register new metabox
+	 *
+	 * @param string $name The metabox id.
+	 * @return object
+	 */
+	public static function register( $name ) {
+		$object = new Metabox_Helper();
+		return $object->register( $name );
+	}
+
+	/**
+	 * Beautiful alias for "register"
+	 *
+	 * @param string $name The metabox id.
+	 * @return object
+	 */
+	public static function make( $name ) {
+		return self::register( $name );
+	}
+}
diff --git a/utilities/class-post-type.php b/utilities/class-post-type.php
new file mode 100644
index 0000000..a8ab93f
--- /dev/null
+++ b/utilities/class-post-type.php
@@ -0,0 +1,39 @@
+<?php
+/**
+ * Post type utility
+ *
+ * @package WPFW
+ */
+
+namespace Wpfw;
+
+use Wpfw\Helpers\Post_Type_Helper;
+
+/**
+ * Class to manage post type utility
+ */
+class Post_Type {
+
+	/**
+	 * Register new post type
+	 *
+	 * @param string $singular_name The singular name.
+	 * @param string $plural_name The plural name.
+	 * @return object
+	 */
+	public static function register( $singular_name, $plural_name = '' ) {
+		$object = new Post_Type_Helper();
+		return $object->register( $singular_name, $plural_name );
+	}
+
+	/**
+	 * Beautiful alias for "register"
+	 *
+	 * @param string $singular_name The singular name.
+	 * @param string $plural_name The plural name.
+	 * @return object
+	 */
+	public static function make( $singular_name, $plural_name = '' ) {
+		return self::register( $singular_name, $plural_name );
+	}
+}
diff --git a/utilities/class-taxonomy.php b/utilities/class-taxonomy.php
new file mode 100644
index 0000000..258c433
--- /dev/null
+++ b/utilities/class-taxonomy.php
@@ -0,0 +1,39 @@
+<?php
+/**
+ * Taxonomy utility
+ *
+ * @package WPFW
+ */
+
+namespace Wpfw;
+
+use Wpfw\Helpers\Taxonomy_Helper;
+
+/**
+ * Class to manage taxonomy utility
+ */
+class Taxonomy {
+
+	/**
+	 * Register new taxonomy
+	 *
+	 * @param string $singular_name The singular name.
+	 * @param string $plural_name The plural name.
+	 * @return object
+	 */
+	public static function register( $singular_name, $plural_name = '' ) {
+		$object = new Taxonomy_Helper();
+		return $object->register( $singular_name, $plural_name );
+	}
+
+	/**
+	 * Beautiful alias for "register"
+	 *
+	 * @param string $singular_name The singular name.
+	 * @param string $plural_name The plural name.
+	 * @return object
+	 */
+	public static function make( $singular_name, $plural_name = '' ) {
+		return self::register( $singular_name, $plural_name );
+	}
+}
diff --git a/utilities/class-vars.php b/utilities/class-vars.php
new file mode 100644
index 0000000..4e055a0
--- /dev/null
+++ b/utilities/class-vars.php
@@ -0,0 +1,60 @@
+<?php
+/**
+ * Setter & getter utility
+ *
+ * @package WPFW
+ */
+
+namespace Wpfw;
+
+/**
+ * Global setter & getter utility
+ *
+ * Vars::set($key, $value);
+ *
+ * @param   string/array  $key
+ * @param   mix           $value
+ *
+ * Vars::get($key);
+ * @param   string  $key
+ * @return  mix     $value
+ */
+class Vars {
+
+	/**
+	 * Item's container
+	 *
+	 * @var array
+	 */
+	private static $vars = [];
+
+	/**
+	 * Get value from a given key
+	 *
+	 * @param string $name The key name.
+	 * @return mixed
+	 */
+	public static function get( $name ) {
+		$value = isset( self::$vars[ $name ] ) ? self::$vars[ $name ] : '';
+		return $value;
+	}
+
+	/**
+	 * Set key-value pair
+	 * - single mode: set the $key as key name, $value as the data
+	 * - multiple mode: set the $key as array of key-value pairs, and leave the $value empty
+	 *
+	 * @param string $name Can be either key name or array of key-value pairs.
+	 * @param string $value The data.
+	 * @return void
+	 */
+	public static function set( $name, $value = '' ) {
+		if ( is_array( $name ) ) {
+			foreach ( $name as $key => $value ) {
+				self::$vars[ $key ] = $value;
+			}
+		} else {
+			self::$vars[ $name ] = $value;
+		}
+	}
+}
diff --git a/wp-functions-wrapper.php b/wp-functions-wrapper.php
new file mode 100644
index 0000000..043f64c
--- /dev/null
+++ b/wp-functions-wrapper.php
@@ -0,0 +1,25 @@
+<?php
+/**
+ * Plugin Name: WordPress Functions Wrapper
+ * Plugin URI:  https://github.com/contactjavas/wp-functions-wrapper
+ * Description: WordPress functions wrapper for faster & simpler development.
+ * Version:     0.0.1
+ * Author:      Bagus
+ * Author URI:  https://buatapp.com/
+ * License:     MIT
+ * License URI: https://oss.ninja/mit?organization=buatapp
+ * Text Domain: wpfw
+ *
+ * @package WPFW
+ */
+
+defined( 'ABSPATH' ) || die( "Can't access directly" );
+
+load_plugin_textdomain( 'wpfw', false, __DIR__ . '/languages' );
+
+// identities constants.
+define( 'WPFW_PLUGIN_VERSION', '0.0.1' );
+define( 'WPFW_PLUGIN_URL', rtrim( plugin_dir_url( __FILE__ ), '/' ) );
+define( 'WPFW_PLUGIN_DIR', rtrim( plugin_dir_path( __FILE__ ), '/' ) );
+
+require_once WPFW_PLUGIN_DIR . '/autoload.php';