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Diffstat (limited to 'bootstrap/comments/backend/like.php')
| -rw-r--r-- | bootstrap/comments/backend/like.php | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/bootstrap/comments/backend/like.php b/bootstrap/comments/backend/like.php new file mode 100644 index 0000000..e808bd7 --- /dev/null +++ b/bootstrap/comments/backend/like.php @@ -0,0 +1,176 @@ +<?php namespace HashOver; + +// Copyright (C) 2010-2018 Jacob Barkdull +// This file is part of HashOver. +// +// HashOver is free software: you can redistribute it and/or modify +// it under the terms of the GNU Affero General Public License as +// published by the Free Software Foundation, either version 3 of the +// License, or (at your option) any later version. +// +// HashOver is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU Affero General Public License for more details. +// +// You should have received a copy of the GNU Affero General Public License +// along with HashOver. If not, see <http://www.gnu.org/licenses/>. +// +//-------------------- +// +// Script Description: +// +// This script reads a given comment file, retrieves the like count, +// increases the count by one, then writes the file. Assuming the +// visitor hasn't already liked the given comment before and the +// visitor isn't the comment's original poster. + + +// Check if request is for JSONP +if (isset ($_GET['jsonp'])) { + // If so, setup HashOver for JavaScript + require ('javascript-setup.php'); +} else { + // If not, setup HashOver for JSON + require ('json-setup.php'); +} + +// Sets cookie indicating what comment was liked +function set_like (&$hashover, $like_hash, $set, &$likes) +{ + $hashover->cookies->set ($like_hash, $set, mktime (0, 0, 0, 11, 26, 3468)); + $likes = $likes + 1; +} + +// Decreases a like/dislike count +function like_decrease (&$likes) +{ + if ($likes > 0) { + $likes = $likes - 1; + } +} + +// Likes or dislikes a comment +function liker ($action, $like_hash, &$hashover, &$comment) +{ + // Get the comment array key based on given action + $key = ($action === 'like') ? 'likes' : 'dislikes'; + $set = ($action === 'like') ? 'liked' : 'disliked'; + + // Get like cookie + $like_cookie = $hashover->cookies->getValue ($like_hash); + + // Check that a like/dislike cookie is not already set + if ($like_cookie === null) { + // If so, set the cookie and increase the like/dislike count + set_like ($hashover, $like_hash, $set, $comment[$key]); + } else { + // If not, we're unliking/un-disliking the comment + $opposite_key = ($action === 'like') ? 'dislikes' : 'likes'; + $opposite_set = ($action === 'like') ? 'disliked' : 'liked'; + + // Check if the user has liked the comment + if ($like_cookie === $set) { + // If so, expire the like cookie + $hashover->cookies->expireCookie ($like_hash); + + // And decrease the like count + like_decrease ($comment[$key]); + } + + // Check if the user has disliked the comment + if ($like_cookie === $opposite_set) { + // If so, expire the dislike cookie + set_like ($hashover, $like_hash, $set, $comment[$key]); + + // And decrease the dislike count + like_decrease ($comment[$opposite_key]); + } + } +} + +function get_json_response ($hashover, $key, $action) +{ + // JSON data + $data = array (); + + // Store references to some long variables + $storageMode =& $hashover->thread->data->storageMode; + $thread = $hashover->setup->threadName; + + // Sanitize file path + $file = str_replace ('../', '', $key); + + // Read comment + $comment = $hashover->thread->data->read ($file, $thread); + + // Return error message if failed to read comment + if ($comment === false) { + return array ('error' => 'Failed to read file: "' . $file . '"'); + } + + // Check if liker isn't poster via login ID comparision + if ($hashover->login->userIsLoggedIn and !empty ($comment['login_id'])) { + if ($hashover->cookies->getValue ('login') === $comment['login_id']) { + // Return error message if liker posted the comment + return array ('message' => 'Practice altruism!'); + } + } + + // Name of the cookie used to indicate liked comments + $like_hash = md5 ($hashover->setup->domain . $thread . '/' . $key); + + // Action: like or dislike + $action = ($action !== 'dislike') ? 'like' : 'dislike'; + + // Like or dislike the comment + liker ($action, $like_hash, $hashover, $comment); + + // Attempt to save file with updated like count + if ($hashover->thread->data->save ($file, $comment, true, $thread)) { + // If successful, add number of likes to JSON + if (isset ($comment['likes'])) { + $data['likes'] = $comment['likes']; + } + + // And add dislikes to JSON as well + if (isset ($comment['dislikes'])) { + $data['dislikes'] = $comment['dislikes']; + } + } else { + // If failed, add error message to JSON + $data['error'] = 'Failed to save comment file!'; + } + + return $data; +} + +try { + // Instanciate HashOver class + $hashover = new \HashOver ('json'); + + // Get required POST/GET data + $url = $hashover->setup->getRequest ('url', null); + $key = $hashover->setup->getRequest ('comment', null); + $action = $hashover->setup->getRequest ('action', null); + + // Return error if we're missing necessary post data + if (($url and $key and $action) === null) { + return array ('error' => 'No action.'); + } + + // Continue HashOver setup + $hashover->setup->setPageURL ($url); + $hashover->initiate (); + + // Display JSON response + $data = get_json_response ($hashover, $key, $action); + + // Return JSON or JSONP function call + echo $hashover->misc->jsonData ($data); + +} catch (\Exception $error) { + $misc = new Misc ('json'); + $message = $error->getMessage (); + $misc->displayError ($message); +} |