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287 lines
8.1 KiB
287 lines
8.1 KiB
<?php
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namespace p3k\XRay\Formats;
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use DOMDocument, DOMXPath;
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use DateTime, DateTimeZone;
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class Instagram extends Format {
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public static function matches_host($url) {
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$host = parse_url($url, PHP_URL_HOST);
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return in_array($host, ['www.instagram.com','instagram.com']);
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}
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public static function matches($url) {
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return self::matches_host($url);
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}
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public static function parse($http, $html, $url) {
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$photoData = self::_extractPhotoDataFromPhotoPage($html);
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if(!$photoData)
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return self::_unknown();
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// Start building the h-entry
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$entry = array(
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'type' => 'entry',
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'url' => $url,
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'author' => [
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'type' => 'card',
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'name' => null,
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'photo' => null,
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'url' => null
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]
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);
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$profiles = [];
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// Fetch profile info for this user
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$username = $photoData['owner']['username'];
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$profile = self::_getInstagramProfile($username, $http);
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if($profile) {
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$entry['author'] = self::_buildHCardFromInstagramProfile($profile);
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$profiles[] = $profile;
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}
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// Content and hashtags
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$caption = false;
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if(isset($photoData['caption'])) {
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$caption = $photoData['caption'];
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} elseif(isset($photoData['edge_media_to_caption']['edges'][0]['node']['text'])) {
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$caption = $photoData['edge_media_to_caption']['edges'][0]['node']['text'];
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}
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if($caption) {
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if(preg_match_all('/#([a-z0-9_-]+)/i', $caption, $matches)) {
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$entry['category'] = [];
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foreach($matches[1] as $match) {
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$entry['category'][] = $match;
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}
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}
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$entry['content'] = [
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'text' => $caption
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];
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}
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$refs = [];
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// Include the photo/video media URLs
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// (Always return arrays, even for single images)
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if(array_key_exists('edge_sidecar_to_children', $photoData)) {
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// Multi-post
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// For now, we will only pull photos from multi-posts, and skip videos.
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$entry['photo'] = [];
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foreach($photoData['edge_sidecar_to_children']['edges'] as $edge) {
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$entry['photo'][] = $edge['node']['display_url'];
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// Don't need to pull person-tags from here because the main parent object already has them.
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}
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} else {
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// Single photo or video
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if(array_key_exists('display_src', $photoData))
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$entry['photo'] = [$photoData['display_src']];
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elseif(array_key_exists('display_url', $photoData))
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$entry['photo'] = [$photoData['display_url']];
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if(array_key_exists('is_video', $photoData) && $photoData['is_video']) {
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$entry['video'] = [$photoData['video_url']];
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}
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}
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// Find person tags and fetch user profiles
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// old instagram json
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if(isset($photoData['usertags']['nodes'])) {
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if(!isset($entry['category'])) $entry['category'] = [];
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foreach($photoData['usertags']['nodes'] as $tag) {
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$profile = self::_getInstagramProfile($tag['user']['username'], $http);
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if($profile) {
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$card = self::_buildHCardFromInstagramProfile($profile);
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$entry['category'][] = $card['url'];
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$refs[$card['url']] = $card;
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$profiles[] = $profile;
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}
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}
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}
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// new instagram json as of approximately 2017-04-19
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if(isset($photoData['edge_media_to_tagged_user']['edges'])) {
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if(!isset($entry['category'])) $entry['category'] = [];
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foreach($photoData['edge_media_to_tagged_user']['edges'] as $edge) {
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$profile = self::_getInstagramProfile($edge['node']['user']['username'], $http);
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if($profile) {
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$card = self::_buildHCardFromInstagramProfile($profile);
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$entry['category'][] = $card['url'];
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$refs[$card['url']] = $card;
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$profiles[] = $profile;
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}
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}
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}
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// Published date
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if(array_key_exists('taken_at_timestamp', $photoData))
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$published = DateTime::createFromFormat('U', $photoData['taken_at_timestamp']);
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elseif(array_key_exists('date', $photoData))
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$published = DateTime::createFromFormat('U', $photoData['date']);
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// Include venue data
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$locations = [];
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if($photoData['location']) {
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$location = self::_getInstagramLocation($photoData['location']['id'], $http);
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if($location) {
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$entry['location'] = [$location['url']];
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$refs[$location['url']] = $location;
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$locations[] = $location;
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// Look up timezone
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if($location['latitude']) {
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$tz = \p3k\Timezone::timezone_for_location($location['latitude'], $location['longitude']);
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if($tz) {
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$published->setTimeZone(new DateTimeZone($tz));
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}
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}
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}
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}
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$entry['published'] = $published->format('c');
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if(count($refs)) {
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$entry['refs'] = $refs;
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}
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return [
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'data' => $entry,
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'original' => json_encode([
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'photo' => $photoData,
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'profiles' => $profiles,
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'locations' => $locations
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])
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];
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}
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private static function _buildHCardFromInstagramProfile($profile) {
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if(!$profile) return false;
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$author = [
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'type' => 'card'
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];
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if($profile['full_name'])
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$author['name'] = $profile['full_name'];
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else
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$author['name'] = $profile['username'];
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if(isset($profile['external_url']) && $profile['external_url'])
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$author['url'] = $profile['external_url'];
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else
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$author['url'] = 'https://www.instagram.com/' . $profile['username'];
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if(isset($profile['profile_pic_url_hd']))
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$author['photo'] = $profile['profile_pic_url_hd'];
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else
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$author['photo'] = $profile['profile_pic_url'];
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return $author;
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}
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private static function _getInstagramProfile($username, $http) {
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$response = $http->get('https://www.instagram.com/'.$username.'/?__a=1');
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if(!$response['error']) {
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$profile = @json_decode($response['body'], true);
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if($profile && array_key_exists('user', $profile)) {
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$user = $profile['user'];
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return $user;
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}
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}
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return null;
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}
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private static function _getInstagramLocation($id, $http) {
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$igURL = 'https://www.instagram.com/explore/locations/'.$id.'/';
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$response = $http->get($igURL);
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if($response['body']) {
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$data = self::_extractVenueDataFromVenuePage($response['body']);
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if($data) {
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return [
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'type' => 'card',
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'name' => $data['name'],
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'url' => $igURL,
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'latitude' => $data['lat'],
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'longitude' => $data['lng'],
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];
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}
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}
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return null;
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}
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private static function _extractPhotoDataFromPhotoPage($html) {
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$data = self::_extractIGData($html);
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if($data && is_array($data) && array_key_exists('entry_data', $data)) {
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if(is_array($data['entry_data']) && array_key_exists('PostPage', $data['entry_data'])) {
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$post = $data['entry_data']['PostPage'];
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if(isset($post[0]['graphql']['shortcode_media'])) {
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return $post[0]['graphql']['shortcode_media'];
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} elseif(isset($post[0]['graphql']['media'])) {
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return $post[0]['graphql']['media'];
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} elseif(isset($post[0]['media'])) {
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return $post[0]['media'];
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}
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}
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}
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return null;
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}
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private static function _extractVenueDataFromVenuePage($html) {
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$data = self::_extractIGData($html);
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if($data && is_array($data) && array_key_exists('entry_data', $data)) {
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if(isset($data['entry_data']['LocationsPage'])) {
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$data = $data['entry_data']['LocationsPage'];
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if(isset($data[0]['location'])) {
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$location = $data[0]['location'];
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# we don't need these and they're huge, so drop them now
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unset($location['media']);
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unset($location['top_posts']);
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return $location;
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}
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}
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}
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return null;
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}
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private static function _extractIGData($html) {
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$doc = new DOMDocument();
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@$doc->loadHTML($html);
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if(!$doc) {
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return null;
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}
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$xpath = new DOMXPath($doc);
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$data = null;
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foreach($xpath->query('//script') as $script) {
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if(preg_match('/window\._sharedData = ({.+});/', $script->textContent, $match)) {
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$data = json_decode($match[1], true);
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}
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}
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return $data;
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}
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}
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