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PhutilConsoleView.php
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Sun, Jan 19, 10:40

PhutilConsoleView.php
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<?php
abstract class PhutilConsoleView extends Phobject {
private $console;
abstract protected function drawView();
final public function setConsole(PhutilConsole $console) {
$this->console = $console;
return $this;
}
final public function getConsole() {
if ($this->console) {
return $this->console;
}
return PhutilConsole::getConsole();
}
/**
* Draw a view to the console.
*
* @return this
* @task draw
*/
final public function draw() {
$string = $this->drawConsoleString();
$console = $this->getConsole();
$console->writeOut('%s', $string);
return $this;
}
/**
* Draw a view to a string and return it.
*
* @return string Console-printable string.
* @task draw
*/
final public function drawConsoleString() {
$view = $this->drawView();
$parts = $this->reduceView($view);
$out = array();
foreach ($parts as $part) {
$out[] = PhutilTerminalString::escapeStringValue($part, true);
}
return implode('', $out);
}
/**
* Reduce a view to a list of simple, unnested parts.
*
* @param wild Any drawable view.
* @return list<wild> List of unnested drawables.
* @task draw
*/
private function reduceView($view) {
if ($view instanceof PhutilConsoleView) {
$view = $view->drawView();
return $this->reduceView($view);
}
if (is_array($view)) {
$parts = array();
foreach ($view as $item) {
foreach ($this->reduceView($item) as $part) {
$parts[] = $part;
}
}
return $parts;
}
return array($view);
}
/* -( Drawing Utilities )-------------------------------------------------- */
/**
* @param list<wild> List of views, one per line.
* @return wild Each view rendered on a separate line.
*/
final protected function drawLines(array $parts) {
$result = array();
foreach ($parts as $part) {
if ($part !== null) {
$result[] = $part;
$result[] = "\n";
}
}
return $result;
}
final protected function implode($separator, array $items) {
$result = array();
foreach ($items as $item) {
$result[] = $item;
$result[] = $separator;
}
array_pop($result);
return $result;
}
}

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