PhutilConsoleView.php
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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 $view Any drawable view.
	* @return list<wild> List of unnested drawables.
	* @task draw
	*/
	private function reduceView($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> $parts 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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