DifferentialRevisionCommentListView.php
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	<?php

	final class DifferentialRevisionCommentListView extends AphrontView {

	private $comments;
	private $handles;
	private $inlines;
	private $changesets;
	private $target;
	private $versusDiffID;
	private $id;

	public function setComments(array $comments) {
	assert_instances_of($comments, 'DifferentialComment');
	$this->comments = $comments;
	return $this;
	}

	public function setInlineComments(array $inline_comments) {
	assert_instances_of($inline_comments, 'PhabricatorInlineCommentInterface');
	$this->inlines = $inline_comments;
	return $this;
	}

	public function setHandles(array $handles) {
	assert_instances_of($handles, 'PhabricatorObjectHandle');
	$this->handles = $handles;
	return $this;
	}

	public function setChangesets(array $changesets) {
	assert_instances_of($changesets, 'DifferentialChangeset');
	$this->changesets = $changesets;
	return $this;
	}

	public function setTargetDiff(DifferentialDiff $target) {
	$this->target = $target;
	return $this;
	}

	public function setVersusDiffID($diff_vs) {
	$this->versusDiffID = $diff_vs;
	return $this;
	}

	public function getID() {
	if (!$this->id) {
	$this->id = celerity_generate_unique_node_id();
	}
	return $this->id;
	}

	public function render() {

	require_celerity_resource('differential-revision-comment-list-css');

	$engine = new PhabricatorMarkupEngine();
	$engine->setViewer($this->user);
	foreach ($this->comments as $comment) {
	$comment->giveFacebookSomeArbitraryDiff($this->target);

	$engine->addObject(
	$comment,
	DifferentialComment::MARKUP_FIELD_BODY);
	}

	foreach ($this->inlines as $inline) {
	$engine->addObject(
	$inline,
	PhabricatorInlineCommentInterface::MARKUP_FIELD_BODY);
	}

	$engine->process();

	$inlines = mgroup($this->inlines, 'getCommentID');

	$num = 1;
	$html = array();
	foreach ($this->comments as $comment) {
	$view = new DifferentialRevisionCommentView();
	$view->setComment($comment);
	$view->setUser($this->user);
	$view->setHandles($this->handles);
	$view->setMarkupEngine($engine);
	$view->setInlineComments(idx($inlines, $comment->getID(), array()));
	$view->setChangesets($this->changesets);
	$view->setTargetDiff($this->target);
	$view->setVersusDiffID($this->versusDiffID);
	if ($comment->getAction() == DifferentialAction::ACTION_SUMMARIZE) {
	$view->setAnchorName('summary');
	} else if ($comment->getAction() == DifferentialAction::ACTION_TESTPLAN) {
	$view->setAnchorName('test-plan');
	} else {
	$view->setAnchorName('comment-'.$num);
	$num++;
	}

	$html[] = $view->render();
	}

	$objs = array_reverse(array_values($this->comments));
	$html = array_reverse(array_values($html));
	$user = $this->user;

	$last_comment = null;
	// Find the most recent comment by the viewer.
	foreach ($objs as $position => $comment) {
	if ($user && ($comment->getAuthorPHID() == $user->getPHID())) {
	if ($last_comment === null) {
	$last_comment = $position;
	} else if ($last_comment == $position - 1) {
	// If the viewer made several comments in a row, show them all. This
	// is a spaz rule for epriestley.
	$last_comment = $position;
	}
	}
	}

	$header = array();
	$hidden = array();
	if ($last_comment !== null) {
	foreach ($objs as $position => $comment) {
	if (!$comment->getID()) {
	// These are synthetic comments with summary/test plan information.
	$header[] = $html[$position];
	unset($html[$position]);
	continue;
	}
	if ($position <= $last_comment) {
	// Always show comments after the viewer's last comment.
	continue;
	}
	if ($position < 3) {
	// Always show the 3 most recent comments.
	continue;
	}
	$hidden[] = $position;
	}
	}

	if (count($hidden) <= 3) {
	// Don't hide if there's not much to hide.
	$hidden = array();
	}

	$header = array_reverse($header);


	$hidden = array_select_keys($html, $hidden);
	$visible = array_diff_key($html, $hidden);

	$hidden = array_reverse($hidden);
	$visible = array_reverse($visible);

	if ($hidden) {
	Javelin::initBehavior(
	'differential-show-all-comments',
	array(
	'markup' => implode("\n", $hidden),
	));
	$hidden = javelin_tag(
	'div',
	array(
	'sigil' => "differential-all-comments-container",
	),
	phutil_tag(
	'div',
	array(
	'class' => 'differential-older-comments-are-hidden',
	),
	array(
	pht(
	'%s older comments are hidden.',
	new PhutilNumber(count($hidden))),
	' ',
	javelin_tag(
	'a',
	array(
	'href' => '#',
	'mustcapture' => true,
	'sigil' => 'differential-show-all-comments',
	),
	pht('Show all comments.')),
	)));
	} else {
	$hidden = null;
	}

	return javelin_render_tag(
	'div',
	array(
	'class' => 'differential-comment-list',
	'id' => $this->getID(),
	),
	implode("\n", $header).
	$hidden.
	implode("\n", $visible));
	}
	}

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