forked from friendica/friendica-addons
Libravatar Addon
Avatar addon to look up avatars at Libravatar. Libravatar is a free and open replacement for Gravatar and you can also host it on you own server. This addon only provides the lookup of avatars at Libravatar. It requires PHP >= 5.3 and you need to disable the gravatar addon.
This commit is contained in:
Klaus Weidenbach
parent
61cb216de3
commit
b3a0ff0330
36
libravatar/README.md
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36
libravatar/README.md
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# Libravatar Plugin
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by [Klaus Weidenbach](http://friendica.dszdw.net/profile/klaus)
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This addon allows you to look up an avatar image for new users and contacts at [Libravatar](http://www.libravatar.com). It will be used if there have not been found any other avatar images yet for example through OpenID.
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Libravatar is a free and open replacement for Gravatar. It is a service where people can store an avatar image for their email-addresses. These avatar images can get looked up for example in comment functions, profile pages, etc. on other sites. There exists a central installation at [www.libravatar.com](http://www.libravatar.com), but you can also host it on your own server. If no avatar was found Libravatar will look up at Gravatar as a fallback.
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There is no rating available, as it is on Gravatar, so all avatar lookups are g-rated. (Suitable for all audiences.)
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PHP >= 5.3 is required for this plugin!
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You can not use the Libravatar and Gravatar addon at the same time. You need to choose one. If you need other ratings than g you better stay with Gravatar, otherwise it is safe to use Libravatar, because it will fall back to Gravatar if nothing was found at Libravatar.
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* * *
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# Configuration
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## Default Avatar Image
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If no avatar was found for an email Libravatar can create some pseudo-random generated avatars based on an email hash. You can choose between these presets:
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* __MM__: (mystery-man) a static image
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* __Identicon__: a generated geometric pattern based on email hash
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* __Monsterid__: a generated 'monster' with different colors, faces, etc. based on email hash
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* __Wavatar__: faces with different features and backgrounds based on email hash
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* __Retro__: 8-bit arcade-styled pixelated faces based on email hash
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See examples at [Libravatar][1].
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## Alternative Configuration
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Open the .htconfig.php file and add "libravatar" to the list of activated addons:
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$a->config['system']['addon'] = "..., libravatar";
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You can add one configuration variable for the addon:
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$a->config['libravatar']['default_avatar'] = "identicon";
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[1]: http://wiki.libravatar.org/api/ "See API documentation at Libravatar for more information"
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372
libravatar/Services/Libravatar.php
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372
libravatar/Services/Libravatar.php
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<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
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/**
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* PHP support for the Libravatar.org service.
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*
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* PHP version 5
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*
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* The MIT License
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*
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* Copyright (c) 2011 Services_Libravatar committers.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @category Services
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* @package Services_Libravatar
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* @author Melissa Draper <melissa@meldraweb.com>
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* @copyright 2011 Services_Libravatar committers.
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* @license http://www.opensource.org/licenses/mit-license.html MIT License
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* @version SVN: <package_version>
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* @link http://pear.php.net/package/Services_Libravatar
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* @since File available since Release 0.1.0
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*/
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/**
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* PHP support for the Libravatar.org service.
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*
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* Using this class is easy. After including or requiring
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* PEAR/libravatar.php simply do:
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* <code>
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* $libravatar = new Services_Libravatar();
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* $url = $libravatar->url('melissa@meldraweb.com');
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* </code>
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*
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* This would populate $url with the string:
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* http://cdn.libravatar.org/avatar/4db84629c121f2d443d33bdb9fd149bc
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*
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* A complicated lookup using all the options is:
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* <code>
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* $libravatar = new Services_Libravatar();
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* $options = array();
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* $options['s'] = '40';
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* $options['algorithm'] = 'sha256';
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* $options['https'] = true;
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* $options['d'] = 'http://upload.wikimedia.org/wikipedia/commons/a/af/Tux.png';
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* $url = $libravatar->url('melissa@meldraweb.com', $options);
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* </code>
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*
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* @category Services
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* @package Services_Libravatar
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* @author Melissa Draper <melissa@meldraweb.com>
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* @copyright 2011 Services_Libravatar committers.
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* @license http://www.opensource.org/licenses/mit-license.html MIT License
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* @version Release: <package_version>
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* @link http://pear.php.net/package/Services_Libravatar
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* @since Class available since Release 0.1.0
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*/
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class Services_Libravatar
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{
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/**
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* Composes a URL for the identifier and options passed in
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*
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* Compose a full URL as specified by the Libravatar API, based on the
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* email address or openid URL passed in, and the options specified.
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*
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* @param string $identifier a string of either an email address
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* or an openid url
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* @param array $options an array of (bool) https, (string) algorithm
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* (string) s or size, (string) d or default
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*
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* @return string A string of a full URL for an avatar image
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*
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* @since Method available since Release 0.1.0
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*/
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public function url($identifier, $options = array())
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{
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// If no identifier has been passed, set it to a null.
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// This way, there'll always be something returned.
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if (!$identifier) {
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$identifier = null;
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}
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$https = null;
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if (isset($options['https']) && $options['https'] === true) {
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$https = true;
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}
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// If the algorithm has been passed in $options, send it on.
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// This will only affect email functionality.
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if (isset($options['algorithm']) && is_string($options['algorithm'])) {
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$identiferHash = $this->identiferHash(
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$identifier,
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$https,
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$options['algorithm']
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);
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} else {
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$identiferHash = $this->identiferHash($identifier, $https);
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}
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// Get the domain so we can determine the SRV stuff for federation
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$domain = $this->domainGet($identifier, $https);
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// If https has been specified in $options, make sure we make the
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// correct SRV lookup
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if (isset($options['https']) && $options['https'] === true) {
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$service = $this->srvGet($domain, true);
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$protocol = 'https';
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} else {
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$service = $this->srvGet($domain);
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$protocol = 'http';
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}
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// We no longer need these, and they will pollute our query string
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unset($options['algorithm']);
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unset($options['https']);
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// If there are any $options left, we want to make those into a query
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$params = null;
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if (count($options) > 0) {
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$params = '?' . http_build_query($options);
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}
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// Compose the URL from the pieces we generated
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$url = $protocol . '://' . $service . '/avatar/' . $identiferHash . $params;
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// Return the URL string
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return $url;
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}
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/**
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* Create a hash of the identifier.
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*
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* Create a hash of the email address or openid passed in. Algorithm
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* used for email address ONLY can be varied. Either md5 or sha256
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* are supported by the Libravatar API. Will be ignored for openid.
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*
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* @param string $identifier A string of the email address or openid URL
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* @param boolean $https If this is https, true.
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* @param string $hash A string of the hash algorithm type to make
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*
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* @return string A string hash of the identifier.
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*
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* @since Method available since Release 0.1.0
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*/
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protected function identiferHash($identifier, $https = false, $hash = 'md5')
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{
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if (filter_var($identifier, FILTER_VALIDATE_EMAIL)) {
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// If email, we can select our algorithm. Default to md5 for
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// gravatar fallback.
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return hash($hash, $identifier);
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} else {
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// The protocol is important. If we're lacking it this will not be
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// filtered. Add it per our preference in the options.
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if (stripos($identifier, 'http') !== 0) {
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if ($https === true) {
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$protocol = 'https://';
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} else {
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$protocol = 'http://';
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}
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$identifier = $protocol . $identifier;
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}
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// Is this an email address or an OpenID account
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$filter = filter_var(
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$identifier,
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FILTER_VALIDATE_URL,
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FILTER_FLAG_PATH_REQUIRED
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);
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if ($filter) {
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// If this is an OpenID, split the string and make sure the
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// formatting is correct. See the Libravatar API for more info.
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// http://wiki.libravatar.org/api/
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$url = parse_url($identifier);
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$hashurl = strtolower($url['scheme']) . '://' .
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strtolower($url['host']);
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if (isset($url['port']) && $url['scheme'] === 'http'
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&& $url['port'] != 80
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|| isset($url['port']) && $url['scheme'] === 'https'
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&& $url['port'] != 443
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) {
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$hashurl .= ':' . $url['port'];
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}
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$hashurl .= $url['path'];
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return hash('sha256', $hashurl);
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}
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}
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}
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/**
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* Grab the domain from the identifier.
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*
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* Extract the domain from the Email or OpenID.
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*
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* @param string $identifier A string of the email address or openid URL
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* @param boolean $https If this is https, true.
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*
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* @return string A string of the domain to use
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*
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* @since Method available since Release 0.1.0
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*/
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protected function domainGet($identifier, $https = false)
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{
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// What are we, email or openid? Split ourself up and get the
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// important bit out.
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if (filter_var($identifier, FILTER_VALIDATE_EMAIL)) {
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$email = explode('@', $identifier);
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return $email[1];
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} else {
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// The protocol is important. If we're lacking it this will not be
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// filtered. Add it per our preference in the options.
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if ( ! strpos($identifier, 'http')) {
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if ($https === true) {
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$protocol = 'https://';
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} else {
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$protocol = 'http://';
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}
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$identifier = $protocol . $identifier;
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}
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$filter = filter_var(
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$identifier,
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FILTER_VALIDATE_URL,
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FILTER_FLAG_PATH_REQUIRED
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);
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if ($filter) {
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$url = parse_url($identifier);
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$domain = $url['host'];
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if (isset($url['port']) && $url['scheme'] === 'http'
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&& $url['port'] != 80
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|| isset($url['port']) && $url['scheme'] === 'https'
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&& $url['port'] != 443
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) {
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$domain .= ':' . $url['port'];
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}
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return $domain;
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}
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}
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}
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/**
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* Get the target to use.
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*
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* Get the SRV record, filtered by priority and weight. If our domain
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* has no SRV records, fall back to Libravatar.org
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*
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* @param string $domain A string of the domain we extracted from the
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* provided identifer with domainGet()
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* @param boolean $https Whether or not to look for https records
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*
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* @return string The target URL.
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*
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* @since Method available since Release 0.1.0
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*/
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protected function srvGet($domain, $https = false)
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{
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// Are we going secure? Set up a fallback too.
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if (isset($https) && $https === true) {
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$subdomain = '_avatars-sec._tcp.';
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$fallback = 'seccdn.';
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} else {
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$subdomain = '_avatars._tcp.';
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$fallback = 'cdn.';
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}
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// Lets try get us some records based on the choice of subdomain
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// and the domain we had passed in.
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$srv = dns_get_record($subdomain . $domain, DNS_SRV);
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// Did we get anything? No?
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if (count($srv) == 0) {
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// Then let's try Libravatar.org.
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return $fallback . 'libravatar.org';
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}
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// Sort by the priority. We must get the lowest.
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usort($srv, array($this, 'comparePriority'));
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$top = $srv[0];
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$sum = 0;
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// Try to adhere to RFC2782's weighting algorithm, page 3
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// "arrange all SRV RRs (that have not been ordered yet) in any order,
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// except that all those with weight 0 are placed at the beginning of
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// the list."
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shuffle($srv);
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$srvs = array();
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foreach ($srv as $s) {
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if ($s['weight'] == 0) {
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array_unshift($srvs, $s);
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} else {
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array_push($srvs, $s);
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}
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}
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foreach ($srvs as $s) {
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if ($s['pri'] == $top['pri']) {
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// "Compute the sum of the weights of those RRs"
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$sum += (int) $s['weight'];
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// "and with each RR associate the running sum in the selected
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// order."
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$pri[$sum] = $s;
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}
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}
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// "Then choose a uniform random number between 0 and the sum computed
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// (inclusive)"
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$random = rand(0, $sum);
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// "and select the RR whose running sum value is the first in the selected
|
||||||
|
// order which is greater than or equal to the random number selected"
|
||||||
|
foreach ($pri as $k => $v) {
|
||||||
|
if ($k >= $random) {
|
||||||
|
return $v['target'];
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Sorting function for record priorities.
|
||||||
|
*
|
||||||
|
* @param mixed $a A mixed value passed by usort()
|
||||||
|
* @param mixed $b A mixed value passed by usort()
|
||||||
|
*
|
||||||
|
* @return mixed The result of the comparison
|
||||||
|
*
|
||||||
|
* @since Method available since Release 0.1.0
|
||||||
|
*/
|
||||||
|
protected function comparePriority($a, $b)
|
||||||
|
{
|
||||||
|
return $a['pri'] - $b['pri'];
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Local variables:
|
||||||
|
* tab-width: 4
|
||||||
|
* c-basic-offset: 4
|
||||||
|
* c-hanging-comment-ender-p: nil
|
||||||
|
* End:
|
||||||
|
*/
|
||||||
|
|
||||||
|
?>
|
||||||
|
|
||||||
2
libravatar/admin.tpl
Normal file
2
libravatar/admin.tpl
Normal file
|
|
@ -0,0 +1,2 @@
|
||||||
|
{{ inc field_select.tpl with $field=$default_avatar}}{{ endinc }}
|
||||||
|
<div class="submit"><input type="submit" value="$submit" /></div>
|
||||||
115
libravatar/libravatar.php
Normal file
115
libravatar/libravatar.php
Normal file
|
|
@ -0,0 +1,115 @@
|
||||||
|
<?php
|
||||||
|
/**
|
||||||
|
* Name: Libravatar Support
|
||||||
|
* Description: If there is no avatar image for a new user or contact this plugin will look for one at Libravatar. Please disable Gravatar addon if you use this one. (requires PHP >= 5.3)
|
||||||
|
* Version: 1.0
|
||||||
|
* Author: Klaus Weidenbach <http://friendica.dszdw.net/profile/klaus>
|
||||||
|
*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Installs the plugin hook
|
||||||
|
*/
|
||||||
|
function libravatar_install() {
|
||||||
|
if (! version_compare(PHP_VERSION, '5.3.0', '>=')) {
|
||||||
|
info(t('Could NOT install Libravatar successfully.<br>It requires PHP >= 5.3') .EOL);
|
||||||
|
// avoid registering the hook
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
register_hook('avatar_lookup', 'addon/libravatar/libravatar.php', 'libravatar_lookup');
|
||||||
|
|
||||||
|
logger("registered libravatar in avatar_lookup hook");
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Removes the plugin hook
|
||||||
|
*/
|
||||||
|
function libravatar_uninstall() {
|
||||||
|
unregister_hook('avatar_lookup', 'addon/libravatar/libravatar.php', 'libravatar_lookup');
|
||||||
|
|
||||||
|
logger("uninstalled libravatar");
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Looks up the avatar at Libravatar and returns the URL.
|
||||||
|
*
|
||||||
|
* @param $a array
|
||||||
|
* @param &$b array
|
||||||
|
*/
|
||||||
|
function libravatar_lookup($a, &$b) {
|
||||||
|
$default_avatar = get_config('libravatar', 'default_img');
|
||||||
|
|
||||||
|
if (! $default_avatar) {
|
||||||
|
// if not set, look up if there was one from the gravatar addon
|
||||||
|
$default_avatar = get_config('gravatar', 'default_img');
|
||||||
|
// setting default avatar if nothing configured
|
||||||
|
if (! $default_avatar)
|
||||||
|
$default_avatar = 'identicon'; // default image will be a random pattern
|
||||||
|
}
|
||||||
|
|
||||||
|
require_once 'Services/Libravatar.php';
|
||||||
|
$libravatar = new Services_Libravatar();
|
||||||
|
$options = array();
|
||||||
|
$options['s'] = $b['size'];
|
||||||
|
$options['d'] = $default_avatar;
|
||||||
|
$avatar_url = $libravatar->url($b['email'], $options);
|
||||||
|
|
||||||
|
$b['url'] = $avatar_url;
|
||||||
|
$b['success'] = true;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Display admin settings for this addon
|
||||||
|
*/
|
||||||
|
function libravatar_plugin_admin (&$a, &$o) {
|
||||||
|
$t = file_get_contents( dirname(__file__)."/admin.tpl");
|
||||||
|
|
||||||
|
$default_avatar = get_config('libravatar', 'default_img');
|
||||||
|
|
||||||
|
// set default values for first configuration
|
||||||
|
if(! $default_avatar)
|
||||||
|
$default_avatar = 'identicon'; // pseudo-random geometric pattern based on email hash
|
||||||
|
|
||||||
|
// Available options for the select boxes
|
||||||
|
$default_avatars = array(
|
||||||
|
'mm' => t('generic profile image'),
|
||||||
|
'identicon' => t('random geometric pattern'),
|
||||||
|
'monsterid' => t('monster face'),
|
||||||
|
'wavatar' => t('computer generated face'),
|
||||||
|
'retro' => t('retro arcade style face'),
|
||||||
|
);
|
||||||
|
|
||||||
|
// Show warning if PHP version is too old
|
||||||
|
if (! version_compare(PHP_VERSION, '5.3.0', '>=')) {
|
||||||
|
$o = '<h5>' .t('Warning') .'</h5><p>';
|
||||||
|
$o .= sprintf(t('Your PHP version %s is lower than the required PHP 5.3.'), PHP_VERSION);
|
||||||
|
$o .= '<br>' .t('This addon is not functional on you server.') .'<p><br>';
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Libravatar falls back to gravatar, so show warning about gravatar addon if enabled
|
||||||
|
$r = q("SELECT * FROM `addon` WHERE `name` = '%s' and `installed` = 1",
|
||||||
|
dbesc('gravatar')
|
||||||
|
);
|
||||||
|
if (count($r)) {
|
||||||
|
$o = '<h5>' .t('Information') .'</h5><p>' .t('Gravatar addon is installed. Please disable the gravatar addon.<br>The Libravatar addon will fall back to gravatar if nothing was found at libravatar.') .'</p><br><br>';
|
||||||
|
}
|
||||||
|
|
||||||
|
// output Libravatar settings
|
||||||
|
$o .= '<input type="hidden" name="form_security_token" value="' .get_form_security_token("libravatarsave") .'">';
|
||||||
|
$o .= replace_macros( $t, array(
|
||||||
|
'$submit' => t('Submit'),
|
||||||
|
'$default_avatar' => array('avatar', t('Default avatar image'), $default_avatar, t('Select default avatar image if none was found. See README'), $default_avatars),
|
||||||
|
));
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Save admin settings
|
||||||
|
*/
|
||||||
|
function libravatar_plugin_admin_post (&$a) {
|
||||||
|
check_form_security_token('libravatarrsave');
|
||||||
|
|
||||||
|
$default_avatar = ((x($_POST, 'avatar')) ? notags(trim($_POST['avatar'])) : 'identicon');
|
||||||
|
set_config('libravatar', 'default_img', $default_avatar);
|
||||||
|
info(t('Libravatar settings updated.') .EOL);
|
||||||
|
}
|
||||||
|
?>
|
||||||
Loading…
Reference in a new issue