872 lines
25 KiB
PHP
872 lines
25 KiB
PHP
<?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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require_once('include/enotify.php');
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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(x($_POST, 'cancel')) {
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goaway(z_root());
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}
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/**
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*
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* Scenario 2: We've introduced ourself to another cell, then have been returned to our own cell
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* to confirm the request, and then we've clicked submit (perhaps after logging in).
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* That brings us here:
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*
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*/
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if((x($_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')) ? $_POST['confirm_key'] : "");
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$hidden = ((x($_POST,'hidden-contact')) ? intval($_POST['hidden-contact']) : 0);
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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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$r = q("SELECT * FROM `contact` WHERE `uid` = %d AND (`url` = '%s' OR `nurl` = '%s') AND `self` = 0 LIMIT 1",
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intval(local_user()),
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dbesc($dfrn_url),
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dbesc(normalise_link($dfrn_url))
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);
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if(count($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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$r = q("UPDATE `contact` SET `ret-aes` = %d, hidden = %d WHERE `id` = %d",
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intval($aes_allow),
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intval($hidden),
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intval($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('include/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( sprintf( tt("%d required parameter was not found at the given location",
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"%d required parameters were not found at the given location",
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$invalid), $invalid) . EOL );
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return;
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}
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}
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$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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$r = q("INSERT INTO `contact` ( `uid`, `created`,`url`, `nurl`, `name`, `nick`, `photo`, `site-pubkey`,
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`request`, `confirm`, `notify`, `poll`, `poco`, `network`, `aes_allow`, `hidden`)
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VALUES ( %d, '%s', '%s', '%s', '%s' , '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d)",
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intval(local_user()),
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datetime_convert(),
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dbesc($dfrn_url),
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dbesc(normalise_link($dfrn_url)),
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$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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$parms['dfrn-poll'],
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$parms['dfrn-poco'],
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dbesc(NETWORK_DFRN),
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intval($aes_allow),
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intval($hidden)
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);
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}
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if($r) {
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info( t("Introduction complete.") . EOL);
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}
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$r = q("select id from contact where uid = %d and url = '%s' and `site-pubkey` = '%s' limit 1",
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intval(local_user()),
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dbesc($dfrn_url),
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$parms['key'] // this was already escaped
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);
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if(count($r)) {
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$g = q("select def_gid from user where uid = %d limit 1",
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intval(local_user())
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);
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if($g && intval($g[0]['def_gid'])) {
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require_once('include/group.php');
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group_add_member(local_user(),'',$r[0]['id'],$g[0]['def_gid']);
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}
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$forwardurl = $a->get_baseurl()."/contacts/".$r[0]['id'];
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} else
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$forwardurl = $a->get_baseurl()."/contacts";
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/**
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* Allow the blocked remote notification to complete
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*/
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if(is_array($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=' . $confirm_key);
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// (ignore reply, nothing we can do it failed)
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// Old: goaway(zrl($dfrn_url));
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goaway($forwardurl);
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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(z_root());
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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 = $a->profile['uid'];
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$maxreq = intval($a->profile['maxreq']);
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$contact_record = null;
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$failed = false;
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$parms = null;
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if( x($_POST,'dfrn_url')) {
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/**
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* Block friend request spam
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*/
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if($maxreq) {
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$r = q("SELECT * FROM `intro` WHERE `datetime` > '%s' AND `uid` = %d",
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dbesc(datetime_convert('UTC','UTC','now - 24 hours')),
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intval($uid)
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);
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if(count($r) > $maxreq) {
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notice( sprintf( t('%s has received too many connection requests today.'), $a->profile['name']) . EOL);
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notice( t('Spam protection measures have been invoked.') . EOL);
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notice( t('Friends are advised to please try again in 24 hours.') . EOL);
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return;
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}
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}
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/**
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*
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* Cleanup old introductions that remain blocked.
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* Also remove the contact record, but only if there is no existing relationship
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* Do not remove email contacts as these may be awaiting email verification
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*/
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$r = q("SELECT `intro`.*, `intro`.`id` AS `iid`, `contact`.`id` AS `cid`, `contact`.`rel`
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FROM `intro` LEFT JOIN `contact` on `intro`.`contact-id` = `contact`.`id`
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WHERE `intro`.`blocked` = 1 AND `contact`.`self` = 0
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AND `contact`.`network` != '%s'
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AND `intro`.`datetime` < UTC_TIMESTAMP() - INTERVAL 30 MINUTE ",
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dbesc(NETWORK_MAIL2)
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);
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if(count($r)) {
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foreach($r as $rr) {
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if(! $rr['rel']) {
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q("DELETE FROM `contact` WHERE `id` = %d",
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intval($rr['cid'])
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);
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}
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q("DELETE FROM `intro` WHERE `id` = %d",
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intval($rr['iid'])
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);
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}
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}
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/**
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*
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* Cleanup any old email intros - which will have a greater lifetime
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*/
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$r = q("SELECT `intro`.*, `intro`.`id` AS `iid`, `contact`.`id` AS `cid`, `contact`.`rel`
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FROM `intro` LEFT JOIN `contact` on `intro`.`contact-id` = `contact`.`id`
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WHERE `intro`.`blocked` = 1 AND `contact`.`self` = 0
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AND `contact`.`network` = '%s'
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AND `intro`.`datetime` < UTC_TIMESTAMP() - INTERVAL 3 DAY ",
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dbesc(NETWORK_MAIL2)
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);
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if(count($r)) {
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foreach($r as $rr) {
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if(! $rr['rel']) {
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q("DELETE FROM `contact` WHERE `id` = %d",
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intval($rr['cid'])
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);
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}
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q("DELETE FROM `intro` WHERE `id` = %d",
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intval($rr['iid'])
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);
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}
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}
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$email_follow = (x($_POST,'email_follow') ? intval($_POST['email_follow']) : 0);
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$real_name = (x($_POST,'realname') ? notags(trim($_POST['realname'])) : '');
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$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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$hcard = '';
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if($email_follow) {
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if(! validate_email($url)) {
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notice( t('Invalid email address.') . EOL);
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return;
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}
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$addr = $url;
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$name = ($realname) ? $realname : $addr;
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$nick = substr($addr,0,strpos($addr,'@'));
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$url = 'http://' . substr($addr,strpos($addr,'@') + 1);
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$nurl = normalise_url($host);
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$poll = 'email ' . random_string();
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$notify = 'smtp ' . random_string();
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$blocked = 1;
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$pending = 1;
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$network = NETWORK_MAIL2;
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$rel = CONTACT_IS_FOLLOWER;
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$mail_disabled = ((function_exists('imap_open') && (! get_config('system','imap_disabled'))) ? 0 : 1);
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if(get_config('system','dfrn_only'))
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$mail_disabled = 1;
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if(! $mail_disabled) {
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$failed = false;
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$r = q("SELECT * FROM `mailacct` WHERE `uid` = %d LIMIT 1",
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intval($uid)
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);
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if(! count($r)) {
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notice( t('This account has not been configured for email. Request failed.') . EOL);
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return;
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}
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}
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$r = q("insert into contact ( uid, created, addr, name, nick, url, nurl, poll, notify, blocked, pending, network, rel )
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values( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, '%s', %d ) ",
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intval($uid),
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dbesc(datetime_convert()),
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dbesc($addr),
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dbesc($name),
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dbesc($nick),
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dbesc($url),
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dbesc($nurl),
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dbesc($poll),
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dbesc($notify),
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intval($blocked),
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intval($pending),
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dbesc($network),
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intval($rel)
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);
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$r = q("select id from contact where poll = '%s' and uid = %d limit 1",
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dbesc($poll),
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intval($uid)
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);
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if(count($r)) {
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$contact_id = $r[0]['id'];
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$g = q("select def_gid from user where uid = %d limit 1",
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intval($uid)
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);
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if($g && intval($g[0]['def_gid'])) {
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require_once('include/group.php');
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group_add_member($uid,'',$contact_id,$g[0]['def_gid']);
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}
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$photo = avatar_img($addr);
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$r = q("UPDATE `contact` SET
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`photo` = '%s',
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`thumb` = '%s',
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`micro` = '%s',
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`name-date` = '%s',
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`uri-date` = '%s',
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`avatar-date` = '%s',
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`hidden` = 0,
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WHERE `id` = %d
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",
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dbesc($photos[0]),
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dbesc($photos[1]),
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dbesc($photos[2]),
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dbesc(datetime_convert()),
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dbesc(datetime_convert()),
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dbesc(datetime_convert()),
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intval($contact_id)
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);
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}
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// contact is created. Now create an introduction
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$hash = random_string();
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$r = q("insert into intro ( uid, `contact-id`, knowyou, note, hash, datetime, blocked )
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values( %d , %d, %d, '%s', '%s', '%s', %d ) " |