/**
* 获取收藏该回答的收藏夹列表
* @return Generator 收藏夹列表
*/
public function collections()
{
$collections_num = $this->collections_num();
if ($collections_num == 0) {
(yield null);
} else {
$collection_url = $this->url . COLLECTION_SUFFIX_URL;
$r = Request::get($collection_url);
$dom = str_get_html($r);
$_xsrf = _xsrf($dom);
$json = $dom->find('div.zh-general-list', 0)->attr['data-init'];
for ($i = 0; $i < $collections_num / 20; $i++) {
if ($i == 0) {
for ($j = 0; $j < min($collections_num, 20); $j++) {
$collection_link = $dom->find('div.zm-item', $j);
(yield parser_collection_from_answer($collection_link));
}
} else {
$post_url = COLLECTION_LIST_URL;
$params = json_decode(html_entity_decode($json))->params;
$params->offset = $i * 20;
$params = json_encode($params);
$data = array('method' => 'next', 'params' => $params, '_xsrf' => $_xsrf);
$r = Request::post($post_url, $data, array("Referer: {$collection_url}"));
$r = json_decode($r)->msg;
for ($j = 0; $j < count($r); $j++) {
$dom = str_get_html($r[$j]);
if (!empty($dom)) {
$collection_link = $dom->find('div.zm-item', 0);
(yield parser_collection_from_answer($collection_link));
}
}
}
}
}
}
/**
* 获取问题关注者
* @return Generator 关注者列表迭代器
*/
public function followers()
{
$followers_num = $this->followers_num();
if ($followers_num == 0) {
(yield null);
} else {
$follwers_url = $this->url . FOLLOWERS_SUFFIX_URL;
$r = Request::get($follwers_url);
$dom = str_get_html($r);
$_xsrf = _xsrf($dom);
for ($i = 0; $i < $followers_num / 20; $i++) {
if ($i == 0) {
for ($j = 0; $j < min($followers_num, 20); $j++) {
$follower_link = $dom->find('div.zm-profile-card h2 a', $j);
(yield parser_user($follower_link));
}
} else {
$data = array('start' => 0, 'offset' => $i * 20, '_xsrf' => $_xsrf);
$r = Request::post($follwers_url, $data, array("Referer: {$follwers_url}"));
$r = json_decode($r)->msg;
$dom = str_get_html($r[1]);
for ($j = 0; $j < min($followers_num - $i * 20, 20); $j++) {
$follower_link = $dom->find('div.zm-profile-card h2', $j);
(yield parser_user($follower_link));
}
}
}
}
}
/**
* 获取问题列表
* @param string $url 目标 url
* @return Generator 问题迭代器
*/
private function question($url)
{
$r = Request::get($url);
$dom = str_get_html($r);
$_xsrf = _xsrf($dom);
$tmp_url = null;
for ($i = 0; !empty($combine = $dom->find('div.feed-item', $i)); $i++) {
$offset = $combine->attr['data-score'];
$question_link = $combine->find('h2 a.question_link', 0);
$question_url = ZHIHU_URL . $question_link->href;
if ($question_url != $tmp_url) {
$tmp_url = $question_url;
$question_title = $question_link->plaintext;
(yield new Question($question_url, $question_title));
}
}
do {
$data = array('start' => 0, 'offset' => $offset, '_xsrf' => $_xsrf);
$r = Request::post($url, $data, array('Referer: {$url}"'));
$r = json_decode($r)->msg;
$item = $r[0];
$dom = str_get_html($r[1]);
for ($i = 0; $item && !empty($combine = $dom->find('div.feed-item', $i)); $i++) {
$offset = $combine->attr['data-score'];
$question_link = $combine->find('h2 a.question_link', 0);
$question_url = ZHIHU_URL . $question_link->href;
if ($question_url != $tmp_url) {
$tmp_url = $question_url;
$question_title = $question_link->plaintext;
(yield new Question($question_url, $question_title));
}
}
} while ($item);
}
/**
* 获取用户列表
* @param String $type 关注或者粉丝
* @return Generator 用户列表
*/
private function follow($type)
{
if ($type === 'FOLLOWERS') {
$num = $this->followers_num();
$url = $this->url . FOLLOWERS_SUFFIX_URL;
$post_url = FOLLOWERS_LIST_URL;
} elseif ($type === 'FOLLOWEES') {
$num = $this->followees_num();
$url = $this->url . FOLLOWEES_SUFFIX_URL;
$post_url = FOLLOWEES_LIST_URL;
}
if ($num <= 0) {
return null;
} else {
$r = Request::get($url);
$dom = str_get_html($r);
$_xsrf = _xsrf($dom);
$json = $dom->find('div.zh-general-list', 0)->attr['data-init'];
for ($i = 0; $i < $num / 20; $i++) {
if ($i == 0) {
for ($j = 0; $j < min($num, 20); $j++) {
$user_list = $dom->find('h2.zm-list-content-title', $j);
(yield parser_user($user_list));
}
} else {
$params = json_decode(html_entity_decode($json))->params;
$params->offset = $i * 20;
$params = json_encode($params);
$data = array('_xsrf' => $_xsrf, 'method' => 'next', 'params' => $params);
$r = Request::post($post_url, $data, array("Referer: {$url}"));
$r = json_decode($r)->msg;
for ($j = 0; $j < min($num - $i * 20, 20); $j++) {
$dom = str_get_html($r[$j]);
$user_list = $dom->find('h2.zm-list-content-title', 0);
(yield parser_user($user_list));
}
}
}
}
}
