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Lines |
Functions and Methods |
Classes and Traits |
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| Total | |
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76 / 107 |
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3 / 9 |
CRAP | |
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0 / 1 |
| Less_Cache | |
71.03% |
76 / 107 |
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3 / 9 |
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| Get | |
74.42% |
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21.84 | |||
| Regen | |
100.00% |
2 / 2 |
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1 / 1 |
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| Cache | |
80.00% |
8 / 10 |
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| OutputFile | |
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| CompiledName | |
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| SetCacheDir | |
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| CheckCacheDir | |
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| CleanCache | |
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| ListFiles | |
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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * Utility for handling the generation and caching of css files |
| 5 | */ |
| 6 | class Less_Cache { |
| 7 | |
| 8 | /** @var string|false Directory less.php can use for storing data */ |
| 9 | public static $cache_dir = false; |
| 10 | |
| 11 | /** @var string Prefix for the storing data */ |
| 12 | public static $prefix = 'lessphp_'; |
| 13 | |
| 14 | /** @var string Prefix for the storing vars */ |
| 15 | public static $prefix_vars = 'lessphpvars_'; |
| 16 | |
| 17 | /** |
| 18 | * @var int Specifies the number of seconds after which data created by less.php will be seen |
| 19 | * as 'garbage' and potentially cleaned up |
| 20 | */ |
| 21 | public static $gc_lifetime = 604800; |
| 22 | |
| 23 | /** |
| 24 | * Save and reuse the results of compiled less files. |
| 25 | * The first call to Get() will generate css and save it. |
| 26 | * Subsequent calls to Get() with the same arguments will return the same css filename |
| 27 | * |
| 28 | * @param array $less_files Array of .less files to compile |
| 29 | * @param array $parser_options Array of compiler options |
| 30 | * @param array $modify_vars Array of variables |
| 31 | * @return string|false Name of the css file |
| 32 | */ |
| 33 | public static function Get( $less_files, $parser_options = [], $modify_vars = [] ) { |
| 34 | // check $cache_dir |
| 35 | if ( isset( $parser_options['cache_dir'] ) ) { |
| 36 | self::$cache_dir = $parser_options['cache_dir']; |
| 37 | } |
| 38 | |
| 39 | if ( empty( self::$cache_dir ) ) { |
| 40 | throw new Exception( 'cache_dir not set' ); |
| 41 | } |
| 42 | |
| 43 | if ( isset( $parser_options['prefix'] ) ) { |
| 44 | self::$prefix = $parser_options['prefix']; |
| 45 | } |
| 46 | |
| 47 | if ( empty( self::$prefix ) ) { |
| 48 | throw new Exception( 'prefix not set' ); |
| 49 | } |
| 50 | |
| 51 | if ( isset( $parser_options['prefix_vars'] ) ) { |
| 52 | self::$prefix_vars = $parser_options['prefix_vars']; |
| 53 | } |
| 54 | |
| 55 | if ( empty( self::$prefix_vars ) ) { |
| 56 | throw new Exception( 'prefix_vars not set' ); |
| 57 | } |
| 58 | |
| 59 | self::CheckCacheDir(); |
| 60 | $less_files = (array)$less_files; |
| 61 | |
| 62 | // create a file for variables |
| 63 | if ( !empty( $modify_vars ) ) { |
| 64 | $lessvars = Less_Parser::serializeVars( $modify_vars ); |
| 65 | $vars_file = self::$cache_dir . self::$prefix_vars . sha1( $lessvars ) . '.less'; |
| 66 | |
| 67 | if ( !file_exists( $vars_file ) ) { |
| 68 | file_put_contents( $vars_file, $lessvars ); |
| 69 | } |
| 70 | |
| 71 | $less_files += [ $vars_file => '/' ]; |
| 72 | } |
| 73 | |
| 74 | // generate name for compiled css file |
| 75 | $hash = md5( json_encode( $less_files ) ); |
| 76 | $list_file = self::$cache_dir . self::$prefix . $hash . '.list'; |
| 77 | |
| 78 | // check cached content |
| 79 | if ( !isset( $parser_options['use_cache'] ) || $parser_options['use_cache'] === true ) { |
| 80 | if ( file_exists( $list_file ) ) { |
| 81 | |
| 82 | self::ListFiles( $list_file, $list, $cached_name ); |
| 83 | $compiled_name = self::CompiledName( $list, $hash ); |
| 84 | |
| 85 | // if $cached_name is the same as the $compiled name, don't regenerate |
| 86 | if ( !$cached_name || $cached_name === $compiled_name ) { |
| 87 | |
| 88 | $output_file = self::OutputFile( $compiled_name, $parser_options ); |
| 89 | |
| 90 | if ( $output_file && file_exists( $output_file ) ) { |
| 91 | @touch( $list_file ); |
| 92 | return basename( $output_file ); // for backwards compatibility, we just return the name of the file |
| 93 | } |
| 94 | } |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | $compiled = self::Cache( $less_files, $parser_options ); |
| 99 | if ( !$compiled ) { |
| 100 | return false; |
| 101 | } |
| 102 | |
| 103 | $compiled_name = self::CompiledName( $less_files, $hash ); |
| 104 | $output_file = self::OutputFile( $compiled_name, $parser_options ); |
| 105 | |
| 106 | // save the file list |
| 107 | $list = $less_files; |
| 108 | $list[] = $compiled_name; |
| 109 | $cache = implode( "\n", $list ); |
| 110 | file_put_contents( $list_file, $cache ); |
| 111 | |
| 112 | // save the css |
| 113 | file_put_contents( $output_file, $compiled ); |
| 114 | |
| 115 | // clean up |
| 116 | self::CleanCache(); |
| 117 | |
| 118 | return basename( $output_file ); |
| 119 | } |
| 120 | |
| 121 | /** |
| 122 | * Force the compiler to regenerate the cached css file |
| 123 | * |
| 124 | * @param array $less_files Array of .less files to compile |
| 125 | * @param array $parser_options Array of compiler options |
| 126 | * @param array $modify_vars Array of variables |
| 127 | * @return string Name of the css file |
| 128 | */ |
| 129 | public static function Regen( $less_files, $parser_options = [], $modify_vars = [] ) { |
| 130 | $parser_options['use_cache'] = false; |
| 131 | return self::Get( $less_files, $parser_options, $modify_vars ); |
| 132 | } |
| 133 | |
| 134 | public static function Cache( &$less_files, $parser_options = [] ) { |
| 135 | $parser_options['cache_dir'] = self::$cache_dir; |
| 136 | $parser = new Less_Parser( $parser_options ); |
| 137 | |
| 138 | // combine files |
| 139 | foreach ( $less_files as $file_path => $uri_or_less ) { |
| 140 | |
| 141 | // treat as less markup if there are newline characters |
| 142 | if ( strpos( $uri_or_less, "\n" ) !== false ) { |
| 143 | $parser->Parse( $uri_or_less ); |
| 144 | continue; |
| 145 | } |
| 146 | |
| 147 | $parser->ParseFile( $file_path, $uri_or_less ); |
| 148 | } |
| 149 | |
| 150 | $compiled = $parser->getCss(); |
| 151 | |
| 152 | $less_files = $parser->AllParsedFiles(); |
| 153 | |
| 154 | return $compiled; |
| 155 | } |
| 156 | |
| 157 | private static function OutputFile( $compiled_name, $parser_options ) { |
| 158 | // custom output file |
| 159 | if ( !empty( $parser_options['output'] ) ) { |
| 160 | |
| 161 | // relative to cache directory? |
| 162 | if ( preg_match( '#[\\\\/]#', $parser_options['output'] ) ) { |
| 163 | return $parser_options['output']; |
| 164 | } |
| 165 | |
| 166 | return self::$cache_dir . $parser_options['output']; |
| 167 | } |
| 168 | |
| 169 | return self::$cache_dir . $compiled_name; |
| 170 | } |
| 171 | |
| 172 | private static function CompiledName( $files, $extrahash ) { |
| 173 | // save the file list |
| 174 | $temp = [ Less_Version::cache_version ]; |
| 175 | foreach ( $files as $file ) { |
| 176 | $temp[] = filemtime( $file ) . "\t" . filesize( $file ) . "\t" . $file; |
| 177 | } |
| 178 | |
| 179 | return self::$prefix . sha1( json_encode( $temp ) . $extrahash ) . '.css'; |
| 180 | } |
| 181 | |
| 182 | public static function SetCacheDir( $dir ) { |
| 183 | self::$cache_dir = $dir; |
| 184 | self::CheckCacheDir(); |
| 185 | } |
| 186 | |
| 187 | public static function CheckCacheDir() { |
| 188 | self::$cache_dir = str_replace( '\\', '/', self::$cache_dir ); |
| 189 | self::$cache_dir = rtrim( self::$cache_dir, '/' ) . '/'; |
| 190 | |
| 191 | if ( !file_exists( self::$cache_dir ) ) { |
| 192 | if ( !mkdir( self::$cache_dir ) ) { |
| 193 | throw new Less_Exception_Parser( 'Less.php cache directory couldn\'t be created: ' . self::$cache_dir ); |
| 194 | } |
| 195 | |
| 196 | } elseif ( !is_dir( self::$cache_dir ) ) { |
| 197 | throw new Less_Exception_Parser( 'Less.php cache directory doesn\'t exist: ' . self::$cache_dir ); |
| 198 | |
| 199 | } elseif ( !is_writable( self::$cache_dir ) ) { |
| 200 | throw new Less_Exception_Parser( 'Less.php cache directory isn\'t writable: ' . self::$cache_dir ); |
| 201 | |
| 202 | } |
| 203 | } |
| 204 | |
| 205 | /** |
| 206 | * Delete unused less.php files |
| 207 | */ |
| 208 | public static function CleanCache() { |
| 209 | static $clean = false; |
| 210 | |
| 211 | if ( $clean || empty( self::$cache_dir ) ) { |
| 212 | return; |
| 213 | } |
| 214 | |
| 215 | $clean = true; |
| 216 | |
| 217 | // only remove files with extensions created by less.php |
| 218 | // css files removed based on the list files |
| 219 | $remove_types = [ 'lesscache' => 1,'list' => 1,'less' => 1,'map' => 1 ]; |
| 220 | |
| 221 | $files = scandir( self::$cache_dir ); |
| 222 | if ( !$files ) { |
| 223 | return; |
| 224 | } |
| 225 | |
| 226 | $check_time = time() - self::$gc_lifetime; |
| 227 | foreach ( $files as $file ) { |
| 228 | |
| 229 | // don't delete if the file wasn't created with less.php |
| 230 | if ( strpos( $file, self::$prefix ) !== 0 ) { |
| 231 | continue; |
| 232 | } |
| 233 | |
| 234 | $parts = explode( '.', $file ); |
| 235 | $type = array_pop( $parts ); |
| 236 | |
| 237 | if ( !isset( $remove_types[$type] ) ) { |
| 238 | continue; |
| 239 | } |
| 240 | |
| 241 | $full_path = self::$cache_dir . $file; |
| 242 | $mtime = filemtime( $full_path ); |
| 243 | |
| 244 | // don't delete if it's a relatively new file |
| 245 | if ( $mtime > $check_time ) { |
| 246 | continue; |
| 247 | } |
| 248 | |
| 249 | // delete the list file and associated css file |
| 250 | if ( $type === 'list' ) { |
| 251 | self::ListFiles( $full_path, $list, $css_file_name ); |
| 252 | if ( $css_file_name ) { |
| 253 | $css_file = self::$cache_dir . $css_file_name; |
| 254 | if ( file_exists( $css_file ) ) { |
| 255 | unlink( $css_file ); |
| 256 | } |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | unlink( $full_path ); |
| 261 | } |
| 262 | } |
| 263 | |
| 264 | /** |
| 265 | * Get the list of less files and generated css file from a list file |
| 266 | */ |
| 267 | public static function ListFiles( $list_file, &$list, &$css_file_name ) { |
| 268 | $list = explode( "\n", file_get_contents( $list_file ) ); |
| 269 | |
| 270 | // pop the cached name that should match $compiled_name |
| 271 | $css_file_name = array_pop( $list ); |
| 272 | |
| 273 | if ( !preg_match( '/^' . self::$prefix . '[a-f0-9]+\.css$/', $css_file_name ) ) { |
| 274 | $list[] = $css_file_name; |
| 275 | $css_file_name = false; |
| 276 | } |
| 277 | } |
| 278 | |
| 279 | } |