Friendica Communications Platform
(please note that this is a clone of the repository at github, issues are handled there)
https://friendi.ca
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560 lines
15 KiB
560 lines
15 KiB
<?php |
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/** |
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* |
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* Module: dfrn_request |
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* |
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* Purpose: Handles communication associated with the issuance of |
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* friend requests. |
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* |
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*/ |
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if(! function_exists('dfrn_request_init')) { |
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function dfrn_request_init(&$a) { |
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if($a->argc > 1) |
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$which = $a->argv[1]; |
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profile_load($a,$which); |
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return; |
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}} |
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/** |
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* Function: dfrn_request_post |
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* |
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* Purpose: |
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* Handles multiple scenarios. |
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* |
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* Scenario 1: |
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* Clicking 'submit' on a friend request page. |
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* |
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* Scenario 2: |
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* Following Scenario 1, we are brought back to our home site |
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* in order to link our friend request with our own server cell. |
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* After logging in, we click 'submit' to approve the linkage. |
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* |
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*/ |
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if(! function_exists('dfrn_request_post')) { |
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function dfrn_request_post(&$a) { |
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if(($a->argc != 2) || (! count($a->profile))) |
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return; |
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if($_POST['cancel']) { |
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goaway($a->get_baseurl()); |
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} |
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/** |
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* |
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* Scenario 2: We've introduced ourself to another cell, then have been returned to our own cell |
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* to confirm the request, and then we've clicked submit (perhaps after logging in). |
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* That brings us here: |
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* |
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*/ |
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if((x($_POST,'localconfirm')) && ($_POST['localconfirm'] == 1)) { |
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/** |
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* Ensure this is a valid request |
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*/ |
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if(local_user() && ($a->user['nickname'] == $a->argv[1]) && (x($_POST,'dfrn_url'))) { |
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$dfrn_url = notags(trim($_POST['dfrn_url'])); |
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$aes_allow = (((x($_POST,'aes_allow')) && ($_POST['aes_allow'] == 1)) ? 1 : 0); |
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$confirm_key = ((x($_POST,'confirm_key')) ? $_POST['confirm_key'] : ""); |
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$contact_record = null; |
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if(x($dfrn_url)) { |
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/** |
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* Lookup the contact based on their URL (which is the only unique thing we have at the moment) |
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*/ |
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$r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `self` = 0 LIMIT 1", |
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intval(local_user()), |
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dbesc($dfrn_url) |
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); |
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if(count($r)) { |
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if(strlen($r[0]['dfrn-id'])) { |
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/** |
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* We don't need to be here. It has already happened. |
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*/ |
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notice( t("This introduction has already been accepted.") . EOL ); |
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return; |
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} |
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else |
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$contact_record = $r[0]; |
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} |
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if(is_array($contact_record)) { |
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$r = q("UPDATE `contact` SET `ret-aes` = %d WHERE `id` = %d LIMIT 1", |
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intval($aes_allow), |
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intval($contact_record['id']) |
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); |
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} |
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else { |
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/** |
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* Scrape the other site's profile page to pick up the dfrn links, key, fn, and photo |
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*/ |
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require_once('Scrape.php'); |
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$parms = scrape_dfrn($dfrn_url); |
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if(! count($parms)) { |
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notice( t('Profile location is not valid or does not contain profile information.') . EOL ); |
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return; |
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} |
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else { |
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if(! x($parms,'fn')) |
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notice( t('Warning: profile location has no identifiable owner name.') . EOL ); |
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if(! x($parms,'photo')) |
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notice( t('Warning: profile location has no profile photo.') . EOL ); |
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$invalid = validate_dfrn($parms); |
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if($invalid) { |
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notice( $invalid . t(' required parameter') |
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. (($invalid == 1) ? t(" was ") : t("s were ") ) |
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. t("not found at the given location.") . EOL ) ; |
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return; |
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} |
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} |
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$dfrn_request = $parms['dfrn-request']; |
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/********* Escape the entire array ********/ |
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dbesc_array($parms); |
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/******************************************/ |
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/** |
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* Create a contact record on our site for the other person |
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*/ |
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$r = q("INSERT INTO `contact` ( `uid`, `created`,`url`, `name`, `nick`, `photo`, `site-pubkey`, |
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`request`, `confirm`, `notify`, `poll`, `aes_allow`) |
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VALUES ( %d, '%s', '%s', '%s' , '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d)", |
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intval(local_user()), |
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datetime_convert(), |
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dbesc($dfrn_url), |
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$parms['fn'], |
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$parms['nick'], |
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$parms['photo'], |
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$parms['key'], |
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$parms['dfrn-request'], |
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$parms['dfrn-confirm'], |
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$parms['dfrn-notify'], |
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$parms['dfrn-poll'], |
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intval($aes_allow) |
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); |
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} |
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if($r) { |
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notice( t("Introduction complete.") . EOL); |
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} |
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/** |
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* Allow the blocked remote notification to complete |
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*/ |
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if(is_array($contact_record)) |
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$dfrn_request = $contact_record['request']; |
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if(strlen($dfrn_request) && strlen($confirm_key)) |
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$s = fetch_url($dfrn_request . '?confirm_key=' . $confirm_key); |
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// (ignore reply, nothing we can do it failed) |
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goaway($dfrn_url); |
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return; // NOTREACHED |
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} |
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} |
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// invalid/bogus request |
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notice( t('Unrecoverable protocol error.') . EOL ); |
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goaway($a->get_baseurl()); |
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return; // NOTREACHED |
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} |
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/** |
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* Otherwise: |
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* |
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* Scenario 1: |
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* We are the requestee. A person from a remote cell has made an introduction |
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* on our profile web page and clicked submit. We will use their DFRN-URL to |
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* figure out how to contact their cell. |
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* |
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* Scrape the originating DFRN-URL for everything we need. Create a contact record |
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* and an introduction to show our user next time he/she logs in. |
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* Finally redirect back to the requestor so that their site can record the request. |
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* If our user (the requestee) later confirms this request, a record of it will need |
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* to exist on the requestor's cell in order for the confirmation process to complete.. |
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* |
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* It's possible that neither the requestor or the requestee are logged in at the moment, |
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* and the requestor does not yet have any credentials to the requestee profile. |
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* |
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* Who is the requestee? We've already loaded their profile which means their nickname should be |
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* in $a->argv[1] and we should have their complete info in $a->profile. |
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* |
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*/ |
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if(! (is_array($a->profile) && count($a->profile))) { |
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notice( t('Profile unavailable.') . EOL); |
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return; |
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} |
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$nickname = $a->profile['nickname']; |
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$notify_flags = $a->profile['notify-flags']; |
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$uid = $a->profile['uid']; |
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$contact_record = null; |
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$failed = false; |
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$parms = null; |
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if( x($_POST,'dfrn_url')) { |
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$url = trim($_POST['dfrn_url']); |
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if(! strlen($url)) { |
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notice( t("Invalid locator") . EOL ); |
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return; |
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} |
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// Canonicalise email-style profile locator |
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$url = webfinger_dfrn($url); |
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if(substr($url,0,5) === 'stat:') { |
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$network = 'stat'; |
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$url = substr($url,5); |
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} |
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else { |
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$network = 'dfrn'; |
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} |
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logger('dfrn_request: url: ' . $url); |
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if(! strlen($url)) { |
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notice( t("Unable to resolve your name at the provided location.") . EOL); |
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return; |
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} |
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if($network === 'dfrn') { |
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$ret = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `self` = 0 LIMIT 1", |
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intval($uid), |
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dbesc($url) |
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); |
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if(count($ret)) { |
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if(strlen($ret[0]['issued-id'])) { |
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notice( t('You have already introduced yourself here.') . EOL ); |
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return; |
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} |
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elseif($ret[0]['rel'] == REL_BUD) { |
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notice( t('Apparently you are already friends with .') . $a->profile['name'] . EOL); |
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return; |
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} |
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else { |
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$contact_record = $ret[0]; |
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$parms = array('dfrn-request' => $ret[0]['request']); |
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} |
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} |
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$issued_id = random_string(); |
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if(is_array($contact_record)) { |
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// There is a contact record but no issued-id, so this |
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// is a reciprocal introduction from a known contact |
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$r = q("UPDATE `contact` SET `issued-id` = '%s' WHERE `id` = %d LIMIT 1", |
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dbesc($issued_id), |
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intval($contact_record['id']) |
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); |
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} |
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else { |
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if(! validate_url($url)) { |
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notice( t('Invalid profile URL.') . EOL); |
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goaway($a->get_baseurl() . '/' . $a->cmd); |
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return; // NOTREACHED |
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} |
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if(! allowed_url($url)) { |
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notice( t('Disallowed profile URL.') . EOL); |
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goaway($a->get_baseurl() . '/' . $a->cmd); |
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return; // NOTREACHED |
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} |
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require_once('Scrape.php'); |
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$parms = scrape_dfrn($url); |
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if(! count($parms)) { |
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notice( t('Profile location is not valid or does not contain profile information.') . EOL ); |
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goaway($a->get_baseurl() . '/' . $a->cmd); |
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} |
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else { |
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if(! x($parms,'fn')) |
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notice( t('Warning: profile location has no identifiable owner name.') . EOL ); |
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if(! x($parms,'photo')) |
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notice( t('Warning: profile location has no profile photo.') . EOL ); |
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$invalid = validate_dfrn($parms); |
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if($invalid) { |
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notice( $invalid . t(' required parameter') |
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. (($invalid == 1) ? t(" was ") : t("s were ") ) |
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. t("not found at the given location.") . EOL ) ; |
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return; |
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} |
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} |
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$parms['url'] = $url; |
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$parms['issued-id'] = $issued_id; |
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dbesc_array($parms); |
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$r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `name`, `nick`, `issued-id`, `photo`, `site-pubkey`, |
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`request`, `confirm`, `notify`, `poll` ) |
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VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s' )", |
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intval($uid), |
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datetime_convert(), |
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$parms['url'], |
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$parms['fn'], |
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$parms['nick'], |
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$parms['issued-id'], |
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$parms['photo'], |
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$parms['key'], |
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$parms['dfrn-request'], |
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$parms['dfrn-confirm'], |
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$parms['dfrn-notify'], |
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$parms['dfrn-poll'] |
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); |
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// find the contact record we just created |
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if($r) { |
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$r = q("SELECT `id` FROM `contact` |
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WHERE `uid` = %d AND `url` = '%s' AND `issued-id` = '%s' LIMIT 1", |
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intval($uid), |
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$parms['url'], |
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$parms['issued-id'] |
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); |
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if(count($r)) |
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$contact_record = $r[0]; |
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} |
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} |
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if($r === false) { |
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notice( t('Failed to update contact record.') . EOL ); |
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return; |
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} |
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$hash = random_string() . (string) time(); // Generate a confirm_key |
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if(is_array($contact_record)) { |
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$ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`) |
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VALUES ( %d, %d, 1, %d, '%s', '%s', '%s' )", |
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intval($uid), |
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intval($contact_record['id']), |
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((x($_POST,'knowyou') && ($_POST['knowyou'] == 1)) ? 1 : 0), |
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dbesc(notags(trim($_POST['dfrn-request-message']))), |
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dbesc($hash), |
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dbesc(datetime_convert()) |
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); |
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} |
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// This notice will only be seen by the requestor if the requestor and requestee are on the same server. |
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if(! $failed) |
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notice( t('Your introduction has been sent.') . EOL ); |
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// "Homecoming" - send the requestor back to their site to record the introduction. |
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$dfrn_url = bin2hex($a->get_baseurl() . '/profile/' . $nickname); |
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$aes_allow = ((function_exists('openssl_encrypt')) ? 1 : 0); |
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goaway($parms['dfrn-request'] . "?dfrn_url=$dfrn_url" |
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. '&dfrn_version=' . DFRN_PROTOCOL_VERSION |
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. '&confirm_key=' . $hash |
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. (($aes_allow) ? "&aes_allow=1" : "") |
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); |
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// NOTREACHED |
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// END $network === 'dfrn' |
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} |
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elseif($network === 'stat') { |
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/** |
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* |
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* OStatus network |
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* Check contact existence |
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* Try and scrape together enough information to create a contact record, with us as REL_VIP |
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* Substitute our user's feed URL into $url template |
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* Send the subscriber home to subscribe |
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* |
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*/ |
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$url = str_replace('{uri}', $a->get_baseurl() . '/dfrn_poll/' . $nickname, $url); |
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goaway($url); |
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// NOTREACHED |
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// END $network === 'stat' |
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} |
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} return; |
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}} |
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if(! function_exists('dfrn_request_content')) { |
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function dfrn_request_content(&$a) { |
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if(($a->argc != 2) || (! count($a->profile))) |
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return ""; |
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$a->page['template'] = 'profile'; |
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// "Homecoming". Make sure we're logged in to this site as the correct user. Then offer a confirm button |
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// to send us to the post section to record the introduction. |
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if(x($_GET,'dfrn_url')) { |
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if(! local_user()) { |
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notice( t("Please login to confirm introduction.") . EOL ); |
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return login(); |
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} |
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// Edge case, but can easily happen in the wild. This person is authenticated, |
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// but not as the person who needs to deal with this request. |
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if ($a->user['nickname'] != $a->argv[1]) { |
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notice( t("Incorrect identity currently logged in. Please login to <strong>this</strong> profile.") . EOL); |
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return login(); |
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} |
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$dfrn_url = notags(trim(hex2bin($_GET['dfrn_url']))); |
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$aes_allow = (((x($_GET,'aes_allow')) && ($_GET['aes_allow'] == 1)) ? 1 : 0); |
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$confirm_key = (x($_GET,'confirm_key') ? $_GET['confirm_key'] : ""); |
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$o .= load_view_file("view/dfrn_req_confirm.tpl"); |
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$o = replace_macros($o,array( |
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'$dfrn_url' => $dfrn_url, |
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'$aes_allow' => (($aes_allow) ? '<input type="hidden" name="aes_allow" value="1" />' : "" ), |
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'$confirm_key' => $confirm_key, |
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'$username' => $a->user['username'], |
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'$uid' => $_SESSION['uid'], |
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'$nickname' => $a->user['nickname'], |
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'dfrn_rawurl' => $_GET['dfrn_url'] |
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)); |
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return $o; |
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} |
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elseif((x($_GET,'confirm_key')) && strlen($_GET['confirm_key'])) { |
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// we are the requestee and it is now safe to send our user their introduction, |
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// We could just unblock it, but first we have to jump through a few hoops to |
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// send an email, or even to find out if we need to send an email. |
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$intro = q("SELECT * FROM `intro` WHERE `hash` = '%s' LIMIT 1", |
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dbesc($_GET['confirm_key']) |
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); |
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if(count($intro)) { |
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$r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid` |
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WHERE `contact`.`id` = %d LIMIT 1", |
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intval($intro[0]['contact-id']) |
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); |
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$auto_confirm = false; |
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if(count($r)) { |
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if($r[0]['page-flags'] != PAGE_NORMAL) |
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$auto_confirm = true; |
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if(($r[0]['notify-flags'] & NOTIFY_INTRO) && (! $auto_confirm)) { |
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$email_tpl = load_view_file('view/request_notify_eml.tpl'); |
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$email = replace_macros($email_tpl, array( |
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'$requestor' => ((strlen(stripslashes($r[0]['name']))) ? stripslashes($r[0]['name']) : t('[Name Withheld]')), |
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'$url' => stripslashes($r[0]['url']), |
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'$myname' => $r[0]['username'], |
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'$siteurl' => $a->get_baseurl(), |
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'$sitename' => $a->config['sitename'] |
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)); |
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$res = mail($r[0]['email'], |
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t("Introduction received at ") . $a->config['sitename'], |
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$email, |
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'From: ' . t('Administrator') . '@' . $_SERVER['SERVER_NAME'] ); |
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// This is a redundant notification - no point throwing errors if it fails. |
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} |
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if($auto_confirm) { |
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require_once('mod/dfrn_confirm.php'); |
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$handsfree = array( |
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'uid' => $r[0]['uid'], |
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'node' => $r[0]['nickname'], |
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'dfrn_id' => $r[0]['issued-id'], |
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'intro_id' => $intro[0]['id'], |
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'duplex' => (($r[0]['page-flags'] == PAGE_FREELOVE) ? 1 : 0) |
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); |
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dfrn_confirm_post($a,$handsfree); |
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} |
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} |
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if(! $auto_confirm) { |
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// If we are auto_confirming, this record will have already been nuked |
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// in dfrn_confirm_post() |
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$r = q("UPDATE `intro` SET `blocked` = 0 WHERE `hash` = '%s' LIMIT 1", |
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dbesc($_GET['confirm_key']) |
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); |
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} |
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} |
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killme(); |
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return; // NOTREACHED |
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} |
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else { |
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$myaddr = ((x($_GET,'address')) ? urldecode($_GET['address']) : ''); |
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// Normal web request. Display our user's introduction form. |
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if($a->profile['page-flags'] == PAGE_NORMAL) |
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$tpl = load_view_file('view/dfrn_request.tpl'); |
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else |
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$tpl = load_view_file('view/auto_request.tpl'); |
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$o .= replace_macros($tpl,array( |
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'$header' => t('Friend/Connection Request'), |
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'$pls_answer' => t('Please answer the following:'), |
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'$does_know' => t('Does $name know you?'), |
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'$yes' => t('Yes'), |
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'$no' => t('No'), |
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'$add_note' => t('Add a personal note:'), |
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'$page_desc' => t('Please enter your profile address from one of the following supported social networks:'), |
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'$friendika' => t('Friendika'), |
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'$statusnet' => t('StatusNet/Federated Social Web'), |
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'$private_net' => t("Private \x28secure\x29 network"), |
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'$public_net' => t("Public \x28insecure\x29 network"), |
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'$your_address' => t('Your profile address:'), |
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'$submit' => t('Submit Request'), |
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'$cancel' => t('Cancel'), |
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'$nickname' => $a->argv[1], |
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'$name' => $a->profile['name'], |
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'$myaddr' => $myaddr |
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)); |
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return $o; |
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} |
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|
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return; // Somebody is fishing. |
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}} |