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Copy pathStreams.php
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executable file
·328 lines (294 loc) · 10.4 KB
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<?php
namespace cli;
class Streams {
/** @var resource */
protected static $out = STDOUT;
/** @var resource */
protected static $in = STDIN;
/** @var resource */
protected static $err = STDERR;
/**
* Call a method on this class.
*
* @param string $func The method name.
* @param array<int, mixed> $args The arguments.
* @return mixed
*/
static function _call( $func, $args ) {
$method = array( __CLASS__, $func );
assert( is_callable( $method ) );
return call_user_func_array( $method, $args );
}
/**
* Check if the stream is a TTY.
*
* @return bool
*/
public static function isTty() {
if ( function_exists( 'stream_isatty' ) ) {
return stream_isatty( static::$out );
} else {
return ( function_exists( 'posix_isatty' ) && posix_isatty( static::$out ) );
}
}
/**
* Handles rendering strings. If extra scalar arguments are given after the `$msg`
* the string will be rendered with `sprintf`. If the second argument is an `array`
* then each key in the array will be the placeholder name. Placeholders are of the
* format {:key}.
*
* @param string $msg The message to render.
* @param mixed ...$args Either scalar arguments or a single array argument.
* @return string The rendered string.
*/
public static function render( $msg, ...$args ) {
// No string replacement is needed
if ( empty( $args ) || ( is_string( $args[0] ) && '' === $args[0] ) ) {
return Colors::shouldColorize() ? Colors::colorize( $msg ) : $msg;
}
// If the first argument is not an array just pass to sprintf
if ( ! is_array( $args[0] ) ) {
// Normalize color tokens before sprintf: colorize or strip them so no raw %tokens reach sprintf
if ( Colors::shouldColorize() ) {
$msg = Colors::colorize( $msg );
} else {
$msg = Colors::decolorize( $msg );
}
// Escape percent characters for sprintf
$msg = (string) preg_replace( '/(%([^\w]|$))/', '%$1', $msg );
$sprintf_args = array_merge( array( $msg ), $args );
/** @var string $rendered */
$rendered = call_user_func_array( 'sprintf', $sprintf_args );
return $rendered;
}
// Here we do named replacement so formatting strings are more understandable
foreach ( $args[0] as $key => $value ) {
$msg = str_replace( '{:' . $key . '}', is_scalar( $value ) ? (string) $value : '', $msg );
}
return Colors::shouldColorize() ? Colors::colorize( $msg ) : $msg;
}
/**
* Shortcut for printing to `STDOUT`. The message and parameters are passed
* through `sprintf` before output.
*
* @param string $msg The message to output in `printf` format.
* @param mixed ...$args Either scalar arguments or a single array argument.
* @return void
* @see \cli\render()
*/
public static function out( $msg, ...$args ) {
$rendered = self::_call( 'render', func_get_args() );
fwrite( static::$out, is_scalar( $rendered ) ? (string) $rendered : '' );
}
/**
* Pads `$msg` to the width of the shell before passing to `cli\out`.
*
* @param string $msg The message to pad and pass on.
* @param mixed ...$args Either scalar arguments or a single array argument.
* @return void
* @see cli\out()
*/
public static function out_padded( $msg, ...$args ) {
$rendered = self::_call( 'render', func_get_args() );
$msg = is_scalar( $rendered ) ? (string) $rendered : '';
self::out( str_pad( $msg, \cli\Shell::columns() ) );
}
/**
* Prints a message to `STDOUT` with a newline appended. See `\cli\out` for
* more documentation.
*
* @param string $msg The message to print.
* @return void
* @see cli\out()
*/
public static function line( $msg = '' ) {
// func_get_args is empty if no args are passed even with the default above.
$args = array_merge( func_get_args(), array( '' ) );
$args[0] = ( is_scalar( $args[0] ) ? (string) $args[0] : '' ) . "\n";
self::_call( 'out', $args );
}
/**
* Shortcut for printing to `STDERR`. The message and parameters are passed
* through `sprintf` before output.
*
* @param string $msg The message to output in `printf` format. With no string,
* a newline is printed.
* @param mixed ...$args Either scalar arguments or a single array argument.
* @return void
*/
public static function err( $msg = '', ...$args ) {
// func_get_args is empty if no args are passed even with the default above.
$args = array_merge( func_get_args(), array( '' ) );
$args[0] = ( is_scalar( $args[0] ) ? (string) $args[0] : '' ) . "\n";
$rendered = self::_call( 'render', $args );
fwrite( static::$err, is_scalar( $rendered ) ? (string) $rendered : '' );
}
/**
* Takes input from `STDIN` in the given format. If an end of transmission
* character is sent (^D), an exception is thrown.
*
* @param string $format A valid input format. See `fscanf` for documentation.
* If none is given, all input up to the first newline
* is accepted.
* @param boolean $hide If true will hide what the user types in.
* @return string The input with whitespace trimmed.
* @throws \Exception Thrown if ctrl-D (EOT) is sent as input.
*/
public static function input( $format = null, $hide = false ) {
if ( $hide ) {
Shell::hide();
}
if ( $format ) {
fscanf( static::$in, $format . "\n", $line );
} else {
$line = fgets( static::$in );
}
if ( $hide ) {
Shell::hide( false );
echo "\n";
}
if ( $line === false ) {
throw new \Exception( 'Caught ^D during input' );
}
return trim( (string) $line );
}
/**
* Displays an input prompt. If no default value is provided the prompt will
* continue displaying until input is received.
*
* @param string $question The question to ask the user.
* @param bool|string $default A default value if the user provides no input.
* @param string $marker A string to append to the question and default value
* on display.
* @param boolean $hide Optionally hides what the user types in.
* @return string The users input.
* @see cli\input()
*/
public static function prompt( $question, $default = false, $marker = ': ', $hide = false ) {
if ( $default && strpos( $question, '[' ) === false ) {
$question .= ' [' . $default . ']';
}
while ( true ) {
self::out( $question . $marker );
$line = self::input( null, $hide );
if ( trim( $line ) !== '' ) {
return $line;
}
if ( $default !== false ) {
return (string) $default;
}
}
}
/**
* Presents a user with a multiple choice question, useful for 'yes/no' type
* questions (which this public static function defaults too).
*
* @param string $question The question to ask the user.
* @param string $choice A string of characters allowed as a response. Case is ignored.
* @param string|null $default The default choice. NULL if a default is not allowed.
* @return string The users choice.
* @see cli\prompt()
*/
public static function choose( $question, $choice = 'yn', $default = 'n' ) {
if ( ! is_string( $choice ) ) {
$choice = join( '', $choice );
}
// Make every choice character lowercase except the default
if ( null !== $default ) {
$choice = str_ireplace( $default, strtoupper( $default ), strtolower( $choice ) );
} else {
$choice = strtolower( $choice );
}
// Separate each choice with a forward-slash
$choices = trim( join( '/', str_split( $choice ) ), '/' );
while ( true ) {
$line = self::prompt( sprintf( '%s? [%s]', $question, $choices ), $default ?? false, '' );
if ( stripos( $choice, $line ) !== false ) {
return strtolower( $line );
}
if ( ! empty( $default ) ) {
return strtolower( $default );
}
}
}
/**
* Displays an array of strings as a menu where a user can enter a number to
* choose an option. The array must be a single dimension with either strings
* or objects with a `__toString()` method.
*
* @param array<int|string, mixed> $items The list of items the user can choose from.
* @param string|null $default The index of the default item.
* @param string $title The message displayed to the user when prompted.
* @return string The index of the chosen item.
* @see cli\line()
* @see cli\input()
* @see cli\err()
*/
public static function menu( $items, $default = null, $title = 'Choose an item' ) {
$map = array_values( $items );
if ( $default && strpos( $title, '[' ) === false && isset( $items[ $default ] ) ) {
$default_item = $items[ $default ];
$default_str = '';
if ( is_scalar( $default_item ) ) {
$default_str = (string) $default_item;
} elseif ( is_object( $default_item ) && method_exists( $default_item, '__toString' ) ) {
$default_str = (string) $default_item;
}
$title .= ' [' . $default_str . ']';
}
foreach ( $map as $idx => $item ) {
$item_str = '';
if ( is_scalar( $item ) ) {
$item_str = (string) $item;
} elseif ( is_object( $item ) && method_exists( $item, '__toString' ) ) {
$item_str = (string) $item;
}
self::line( ' %d. %s', $idx + 1, $item_str );
}
self::line();
while ( true ) {
fwrite( static::$out, sprintf( '%s: ', $title ) );
$line = self::input();
if ( is_numeric( $line ) ) {
--$line;
if ( isset( $map[ $line ] ) ) {
return (string) array_search( $map[ $line ], $items );
}
if ( $line < 0 || $line >= count( $map ) ) {
self::err( 'Invalid menu selection: out of range' );
}
} elseif ( isset( $default ) ) {
return $default;
}
}
}
/**
* Sets one of the streams (input, output, or error) to a `stream` type resource.
*
* Valid $whichStream values are:
* - 'in' (default: STDIN)
* - 'out' (default: STDOUT)
* - 'err' (default: STDERR)
*
* Any custom streams will be closed for you on shutdown, so please don't close stream
* resources used with this method.
*
* @param string $whichStream The stream property to update
* @param resource $stream The new stream resource to use
* @return void
* @throws \Exception Thrown if $stream is not a resource of the 'stream' type.
*/
public static function setStream( $whichStream, $stream ) {
if ( ! is_resource( $stream ) || get_resource_type( $stream ) !== 'stream' ) {
throw new \Exception( 'Invalid resource type!' );
}
if ( property_exists( __CLASS__, $whichStream ) ) {
static::${$whichStream} = $stream;
}
register_shutdown_function(
function () use ( $stream ) {
fclose( $stream );
}
);
}
}
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