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<?php |
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namespace League\Plates\Util; |
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use League\Plates\Exception\PlatesException; |
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use League\Plates\Exception\StackException; |
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function id() { |
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return function($arg) { |
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return $arg; |
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}; |
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} |
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/** simple utility that wraps php echo which allows for stubbing out the |
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echo func for testing */ |
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function phpEcho() { |
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return function($v) { |
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echo $v; |
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}; |
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} |
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/** stack a set of functions into each other and returns the stacked func */ |
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function stack(array $funcs) { |
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return array_reduce($funcs, function($next, $func) { |
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return function(...$args) use ($next, $func) { |
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$args[] = $next; |
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return $func(...$args); |
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}; |
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}, function() { |
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throw new StackException('No handler was able to return a result.'); |
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}); |
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} |
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function stackGroup(array $funcs) { |
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$end_next = null; |
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array_unshift($funcs, function(...$args) use (&$end_next) { |
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return $end_next(...array_slice($args, 0, -1)); |
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}); |
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$next = stack($funcs); |
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return function(...$args) use ($next, &$end_next) { |
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$end_next = end($args); |
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return $next(...array_slice($args, 0, -1)); |
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}; |
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} |
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/** compose(f, g)(x) = f(g(x)) */ |
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function compose(...$funcs) { |
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return pipe(...array_reverse($funcs)); |
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} |
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/** pipe(f, g)(x) = g(f(x)) */ |
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function pipe(...$funcs) { |
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return function($arg) use ($funcs) { |
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return array_reduce($funcs, function($acc, $func) { |
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return $func($acc); |
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}, $arg); |
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}; |
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} |
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function joinPath(array $parts, $sep = DIRECTORY_SEPARATOR) { |
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return array_reduce(array_filter($parts), function($acc, $part) use ($sep) { |
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if ($acc === null) { |
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return rtrim($part, $sep); |
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} |
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return $acc . $sep . ltrim($part, $sep); |
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}, null); |
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} |
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function isAbsolutePath($path) { |
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return strpos($path, '/') === 0; |
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} |
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function isRelativePath($path) { |
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return strpos($path, './') === 0 || strpos($path, '../') === 0; |
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} |
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function isResourcePath($path) { |
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return strpos($path, '://') !== false; |
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} |
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function isPath($path) { |
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return isAbsolutePath($path) || isRelativePath($path) || isResourcePath($path); |
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} |
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/** returns the debug type of an object as string for exception printing */ |
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function debugType($v) { |
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if (is_object($v)) { |
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return 'object ' . get_class($v); |
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} |
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return gettype($v); |
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} |
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function spliceArrayAtKey(array $array, $key, array $values, $after = true) { |
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$new_array = []; |
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$spliced = false; |
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foreach ($array as $array_key => $val) { |
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if ($array_key == $key) { |
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$spliced = true; |
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if ($after) { |
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$new_array[$array_key] = $val; |
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$new_array = array_merge($new_array, $values); |
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} else { |
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$new_array = array_merge($new_array, $values); |
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$new_array[$array_key] = $val; |
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} |
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} else { |
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$new_array[$array_key] = $val; |
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} |
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} |
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if (!$spliced) { |
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throw new PlatesException('Could not find key ' . $key . ' in array.'); |
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} |
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return $new_array; |
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} |
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function cachedFileExists(Psr\SimpleCache\CacheInterface $cache, $ttl = 3600, $file_exists = 'file_exists') { |
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return function($path) use ($cache, $ttl, $file_exists) { |
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$key = 'League.Plates.file_exists.' . $path; |
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$res = $cache->get($key); |
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if (!$res) { |
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$res = $file_exists($path); |
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$cache->set($key, $res, $ttl); |
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} |
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return $res; |
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}; |
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} |
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/** Invokes the callable if the predicate returns true. Returns the value otherwise. */ |
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function when(callable $predicate, callable $fn) { |
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return function($arg) use ($predicate, $fn) { |
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return $predicate($arg) ? $fn($arg) : $arg; |
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}; |
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} |
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thephpleague /
plates
