public function appendFieldsToPropertyList(PhabricatorCustomFieldInterface $object, PhabricatorUser $viewer, PHUIPropertyListView $view)
{
$this->readFieldsFromStorage($object);
$fields = $this->fields;
foreach ($fields as $field) {
$field->setViewer($viewer);
}
// Move all the blocks to the end, regardless of their configuration order,
// because it always looks silly to render a block in the middle of a list
// of properties.
$head = array();
$tail = array();
foreach ($fields as $key => $field) {
$style = $field->getStyleForPropertyView();
switch ($style) {
case 'property':
case 'header':
$head[$key] = $field;
break;
case 'block':
$tail[$key] = $field;
break;
default:
throw new Exception(pht("Unknown field property view style '%s'; valid styles are " . "'%s' and '%s'.", $style, 'block', 'property'));
}
}
$fields = $head + $tail;
$add_header = null;
$phids = array();
foreach ($fields as $key => $field) {
$phids[$key] = $field->getRequiredHandlePHIDsForPropertyView();
}
$all_phids = array_mergev($phids);
if ($all_phids) {
$handles = id(new PhabricatorHandleQuery())->setViewer($viewer)->withPHIDs($all_phids)->execute();
} else {
$handles = array();
}
foreach ($fields as $key => $field) {
$field_handles = array_select_keys($handles, $phids[$key]);
$label = $field->renderPropertyViewLabel();
$value = $field->renderPropertyViewValue($field_handles);
if ($value !== null) {
switch ($field->getStyleForPropertyView()) {
case 'header':
// We want to hide headers if the fields the're assciated with
// don't actually produce any visible properties. For example, in a
// list like this:
//
// Header A
// Prop A: Value A
// Header B
// Prop B: Value B
//
// ...if the "Prop A" field returns `null` when rendering its
// property value and we rendered naively, we'd get this:
//
// Header A
// Header B
// Prop B: Value B
//
// This is silly. Instead, we hide "Header A".
$add_header = $value;
break;
case 'property':
if ($add_header !== null) {
// Add the most recently seen header.
$view->addSectionHeader($add_header);
$add_header = null;
}
$view->addProperty($label, $value);
break;
case 'block':
$icon = $field->getIconForPropertyView();
$view->invokeWillRenderEvent();
if ($label !== null) {
$view->addSectionHeader($label, $icon);
}
$view->addTextContent($value);
break;
}
}
}
}