intial commit

.gitignore

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+vendor/

Readme.md

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+# wp_enqueue_less
+
+wp_enqueue_less provides a function to enqueue less stylesheets in WordPress.
+
+## Install
+
+### Composer
+
+Composer is the best way to install wp_enqueue_less so you get updates in the future easily.
+
+```
+composer require ed-itsolutions/wp_enqueue_less
+```
+
+and then in your `functions.php` of `plugin.php`
+
+```php
+require_once('vendor/autoload.php');
+```
+
+### Manually
+
+Download a copy of wp_enqueue_less.php and require it in your theme/plugin.
+
+## Usage
+
+In your normal `wp_enqueue_scripts` action simply call `wp_enqueue_less`
+
+`wp_enqueue_less` takes 3 arguments.
+
+ - _key_ - The key name to use for this stylesheet.
+ - _filePath_ - The on disk path to the .less file.
+ - _variables_ - A key->value array of variables to be passed to the less compiler.
+
+```php
+add_action('wp_enqueue_scripts', function(){
+  wp_enqueue_style('theme-stylesheet', get_stylesheet_uri());
+
+  wp_enqueue_less('theme-main', get_template_directory() . '/less/main.less', array(
+    'main-color' => '#99bbff' // becomes @main-color in your less stylesheet.
+  ));
+});
+```
+
+Thats it!
+
+wp_enqueue_less will:
+
+ - Compile this less file and write the output to `/wp-content/uploads/less/key-hash.css` (this can be changed with the filter `wp_enqueue_less_css_dir`).
+ - Record the current hashes of all the less files used and the variables into the database.
+ - On the next call if none of the hashes have changed it will skip parsing.
+ - On a daily basis it will clean out its directory of everything but the current hash version of the stylesheet.

composer.json

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+{
+    "name": "ed-itsolutions/wup-client",
+    "description": "WordPress Update Provider client for use in plugins / themes.",
+    "require": {
+        "oyejorge/less.php": "v1.7.0.14"
+    },
+    "license": "MIT",
+    "authors": [
+      {
+        "name": "Adam Laycock",
+        "email": "[email protected]",
+        "homepage": "https://arcath.net",
+        "role": "Developer"
+      }
+    ],
+    "autoload": {
+      "files": ["wp_enqueue_less.php"]
+  }
+}

wp_enqueue_less.php

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+<?php
+function wp_enqueue_less($key, $file, $variables){
+  $details = get_option('wp_enqueue_less_' . $key, new StdClass);
+
+  if(!$details->key){
+    $details->key = $key;
+    $details->file = $file;
+    $details->setting = 'wp_enqueue_less_' . $key;
+
+    do_action('wp_enqueue_less_compile', $details, $variables);
+  }else{
+    if(md5(json_encode($variables)) != $details->variablesHash){
+      do_action('wp_enqueue_less_compile', $details, $variables);
+    }else{
+      $filesChanged = false;
+
+      foreach(array_keys($details->fileHashes) as $fileName){
+        if(!$filesChanged && md5_file($fileName) != $details->fileHashes[$fileName]){
+          $filesChanged = true;
+        }
+      }
+
+      if($filesChanged){
+        do_action('wp_enqueue_less_compile', $details, $variables);
+      }
+    }
+  }
+
+  $baseUri = apply_filters('wp_enqueue_less_css_dir', wp_upload_dir()['baseurl'] . '/less');
+  wp_enqueue_style($key, $baseUri . '/' . $details->key . '-' . $details->hash . '.css');
+
+  if(!wp_next_scheduled('wp_enqueue_less_clean')){
+    wp_schedule_event(time(), 'daily', 'wp_enqueue_less_clean');
+  }
+}
+
+add_action('wp_enqueue_less_compile', function($details, $variables){
+  $parser = new Less_Parser();
+  $parser->parseFile($details->file, get_template_directory_uri());
+  $parser->ModifyVars($variables);
+  $css = $parser->getCss();
+
+  $hash = md5($css);
+
+  $dir = apply_filters('wp_enqueue_less_css_dir', wp_upload_dir()['basedir'] . '/less');
+  if(!file_exists($dir)){
+    mkdir($dir);
+  }
+
+  $file = $dir . '/' . $details->key . '-' . $hash . '.css';
+
+  file_put_contents($file, $css);
+
+  $details->hash = $hash;
+
+  $details->fileHashes = array();
+  foreach($parser->allParsedFiles() as $fileName){
+    $details->fileHashes[$fileName] = md5_file($fileName);
+  }
+
+  $details->variablesHash = md5(json_encode($variables));
+
+  update_option($details->setting, $details);
+}, 10, 2);
+
+add_action('wp_enqueue_less_clean', function(){
+  $dir = apply_filters('wp_enqueue_less_css_dir', wp_upload_dir()['basedir'] . '/less');
+
+  $files = scandir($dir);
+
+  $keyDetails = array();
+
+  foreach($files as $file){
+    if($file != '.' && $file != '..'){
+      $key = substr($file, 0, -37);
+      $hash = substr($file, -36, -4);
+
+      if(!isset($keyDetails[$key])){
+        $keyDetails[$key] = get_option('wp_enqueue_less_' . $key, new StdClass);
+      }
+
+      if($hash != $keyDetails[$key]->hash){
+        unlink($dir . '/' . $file);
+      }
+    }
+  }
+});