Added create tool

To use `php create.php` and answer the prompts.
This will create a folder alongside this theme with the provided
metadata as well as namespaced attributes refactored.

block-canvas/create.php

@@ -0,0 +1,231 @@
+<?php
+/**
+ * Generates a theme based on the this theme.
+ * Simplified version of https://github.com/Automattic/underscores.me/blob/master/plugins/underscoresme-generator/underscoresme-generator.php
+ */
+
+class Generate_Theme {
+
+	protected $theme;
+	protected $old_themename = 'Block Canvas';
+	protected $old_themeslug = 'block-canvas';
+
+	function __construct() {
+
+		$this->theme = array(
+			'name'        => $this->old_themename,
+			'slug'        => $this->old_themeslug,
+			'uri'         => 'https://github.com/wordpress/theme-experiments/',
+			'author'      => 'Kjell Reigstad',
+			'description' => 'The base for a block-based theme.',
+		);
+		$this->get_theme_info();
+		$this->create_folder();
+	}
+
+	function get_theme_info() {
+
+		echo "Please provide the following information: ";
+		echo "\n";
+		echo "Theme name: ";
+		$input = fopen ("php://stdin","r");
+		$this->theme['name'] = trim(fgets($input));
+		if($this->theme['name'] === ''){
+			echo "ABORTING!\n";
+			exit;
+		}
+		$this->theme['slug'] = $this->sanitize_title_with_dashes($this->theme['name']);
+		$this->theme['functions_slug'] = str_replace( '-', '_', $this->theme['slug'] );
+
+		echo "Description: ";
+		$input = fopen ("php://stdin","r");
+		$this->theme['description'] = trim(fgets($input));
+
+		echo "Author: ";
+		$input = fopen ("php://stdin","r");
+		$this->theme['author'] = trim(fgets($input));
+
+		echo "Theme URI: ";
+		$input = fopen ("php://stdin","r");
+		$this->theme['uri'] = trim(fgets($input));
+	}
+
+	function create_folder() {
+
+		$dir = '../' . $this->theme['slug'];
+
+		if( is_dir($dir) === false ) {
+
+			mkdir($dir);
+			$prototype_dir = './';
+			$exclude_files = array( 'create.php', '.travis.yml', 'codesniffer.ruleset.xml', '.jscsrc', '.jshintignore', 'README.md', 'CONTRIBUTING.md', '.git', '.svn', '.DS_Store', '.gitignore', '.', '..' );
+			$exclude_directories = array( '.git', '.svn', '.github', '.', '..' );
+
+			foreach ( $iterator = new \RecursiveIteratorIterator( new \RecursiveDirectoryIterator($prototype_dir, \RecursiveDirectoryIterator::SKIP_DOTS), \RecursiveIteratorIterator::SELF_FIRST) as $item ) {
+				if ( in_array( $iterator->getSubPathName(), $exclude_files ) || in_array( $iterator->getSubPathName(), $exclude_directories ) ){
+					continue;
+				}
+
+				if ($item->isDir()) {
+				   	mkdir($dir . DIRECTORY_SEPARATOR . $iterator->getSubPathName());
+				} else {
+					$contents = file_get_contents( $prototype_dir . $iterator->getSubPathName() );
+					$file = fopen( $dir . '/' . $iterator->getSubPathName(),"w" );
+					fwrite( $file, $this->replace_theme_name($contents, $iterator->getSubPathName()) );
+					fclose( $file );
+				}
+			}
+			echo "\n";
+			echo "Your new theme is ready!\n";
+		} else {
+			echo "\n";
+			echo "This theme already exists\n";
+		}
+	}
+
+	function replace_theme_name($contents, $filename) {
+
+		// Replace only text files, skip png's and other stuff.
+		$valid_extensions = array( 'php', 'css', 'scss', 'js', 'txt', 'html' );
+		$valid_extensions_regex = implode( '|', $valid_extensions );
+		if ( ! preg_match( "/\.({$valid_extensions_regex})$/", $filename ) ) {
+			return $contents;
+		}
+		$theme_slug_underscore = str_replace( '-', '_', $this->old_themeslug );
+
+
+		// Special treatment for style.css
+		if ( 'style.css' === $filename ) {
+			$theme_headers = array(
+				'Theme Name'  => $this->theme['name'],
+				'Text Domain' => $this->theme['slug'],
+				'Theme URI' => $this->theme['uri'],
+				'Description' => $this->theme['description'],
+				'Author' => $this->theme['author'],
+			);
+
+			foreach ( $theme_headers as $key => $value ) {
+				$contents = preg_replace( '/(' . preg_quote( $key ) . ':)\s?(.+)/', '\\1 ' . $value, $contents );
+			}
+
+			$contents = str_replace( $this->old_themename, $this->theme['name'], $contents );
+			return $contents;
+		}
+
+		// Special treatment for functions.php
+		if ( 'functions.php' === $filename ) {
+
+			$function_names = array(
+				'wp_enqueue_style',
+				'wp_enqueue_script'
+			);
+
+			foreach ( $function_names as $function ) {
+				$contents = preg_replace('/('.preg_quote($function).'[ ]?\([ ]?(?:\'|"))('.preg_quote($theme_slug_underscore).')/', '$1'.$this->theme['slug'], $contents);
+			}
+
+			$contents = str_replace( $theme_slug_underscore, $this->theme['functions_slug'], $contents );
+			$contents = str_replace( $this->old_themeslug, $this->theme['functions_slug'], $contents );
+			$contents = str_replace( $this->old_themename, $this->theme['name'], $contents );
+			return $contents;
+		}
+
+		// Special treatment for php files
+		else if ( 'php' === substr($filename, strrpos($filename, '.') + 1) ) {
+			$contents = str_replace( $theme_slug_underscore, $this->theme['slug'], $contents );
+			$contents = str_replace( $this->old_themeslug, $this->theme['slug'], $contents );
+			return $contents;
+		}
+
+		// Special treatment for templates
+		else if ( 'html' === substr($filename, strrpos($filename, '.') + 1) ) {
+			$contents = str_replace( $theme_slug_underscore, $this->theme['slug'], $contents );
+			$contents = str_replace( $this->old_themeslug, $this->theme['slug'], $contents );
+			return $contents;
+		}
+
+		return $contents;
+	}
+
+	function sanitize_title_with_dashes( $title, $raw_title = '', $context = 'display' ) {
+		$title = strip_tags( $title );
+		// Preserve escaped octets.
+		$title = preg_replace( '|%([a-fA-F0-9][a-fA-F0-9])|', '---$1---', $title );
+		// Remove percent signs that are not part of an octet.
+		$title = str_replace( '%', '', $title );
+		// Restore octets.
+		$title = preg_replace( '|---([a-fA-F0-9][a-fA-F0-9])---|', '%$1', $title );
+
+		$title = strtolower( $title );
+
+		if ( 'save' === $context ) {
+			// Convert &nbsp, &ndash, and &mdash to hyphens.
+			$title = str_replace( array( '%c2%a0', '%e2%80%93', '%e2%80%94' ), '-', $title );
+			// Convert &nbsp, &ndash, and &mdash HTML entities to hyphens.
+			$title = str_replace( array( '&nbsp;', '&#160;', '&ndash;', '&#8211;', '&mdash;', '&#8212;' ), '-', $title );
+			// Convert forward slash to hyphen.
+			$title = str_replace( '/', '-', $title );
+
+			// Strip these characters entirely.
+			$title = str_replace(
+				array(
+					// Soft hyphens.
+					'%c2%ad',
+					// &iexcl and &iquest.
+					'%c2%a1',
+					'%c2%bf',
+					// Angle quotes.
+					'%c2%ab',
+					'%c2%bb',
+					'%e2%80%b9',
+					'%e2%80%ba',
+					// Curly quotes.
+					'%e2%80%98',
+					'%e2%80%99',
+					'%e2%80%9c',
+					'%e2%80%9d',
+					'%e2%80%9a',
+					'%e2%80%9b',
+					'%e2%80%9e',
+					'%e2%80%9f',
+					// Bullet.
+					'%e2%80%a2',
+					// &copy, &reg, &deg, &hellip, and &trade.
+					'%c2%a9',
+					'%c2%ae',
+					'%c2%b0',
+					'%e2%80%a6',
+					'%e2%84%a2',
+					// Acute accents.
+					'%c2%b4',
+					'%cb%8a',
+					'%cc%81',
+					'%cd%81',
+					// Grave accent, macron, caron.
+					'%cc%80',
+					'%cc%84',
+					'%cc%8c',
+				),
+				'',
+				$title
+			);
+
+			// Convert &times to 'x'.
+			$title = str_replace( '%c3%97', 'x', $title );
+		}
+
+		// Kill entities.
+		$title = preg_replace( '/&.+?;/', '', $title );
+		$title = str_replace( '.', '-', $title );
+
+		$title = preg_replace( '/[^%a-z0-9 _-]/', '', $title );
+		$title = preg_replace( '/\s+/', '-', $title );
+		$title = preg_replace( '|-+|', '-', $title );
+		$title = trim( $title, '-' );
+
+		return $title;
+	}
+}
+
+new Generate_Theme;
+?>