mirror of
https://github.com/pierre42100/ComunicAPI
synced 2024-11-23 22:09:29 +00:00
338 lines
8.8 KiB
PHP
338 lines
8.8 KiB
PHP
<?php
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/**
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* Posts management class
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*
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* @author Pierre HUBERT
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*/
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class Posts {
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/**
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* Visibility levels
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*/
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//Posts that can be seen by anyone
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const VISIBILITY_PUBLIC = 1;
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//Posts that can be seen by the friends of the user
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const VISIBILITY_FRIENDS = 2;
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//Posts that can be seen by the user only
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const VISIBILITY_USER = 3;
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/**
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* Access level to a post
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*/
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//When a user can't access to a post
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const NO_ACCESS = 0;
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//When a user can see a post and perform basic actions such as liking
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const BASIC_ACCESS = 1;
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//When a user has intermediate access to the post (delete post)
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const INTERMEDIATE_ACCESS = 2;
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//When a user has a full access to the post
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const FULL_ACCESS = 3;
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/**
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* Table informations
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*/
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//Name of the table
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const TABLE_NAME = "texte";
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//Translation of posts types between the API language and the database structure
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const POSTS_TYPE = array(
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"texte" => "text",
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"image" => "image",
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"webpage_link" => "weblink",
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"pdf" => "pdf",
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"video" => "movie",
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"count_down" => "countdown",
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"sondage" => "survey",
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"youtube" => "youtube"
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);
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/**
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* Get the visibility level of a user other another user
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*
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* @param int $userID The ID of the user to fetch
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* @param int $targetID The ID of the user target
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* @return int Visibility level
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*/
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public function getUserVisibility(int $userID, int $targetID) : int {
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//If the user making the request and the target user are the same
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if($userID == $targetID)
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return $this::VISIBILITY_USER;
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//Check user if is signed out
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if($userID == 0)
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return $this::VISIBILITY_PUBLIC;
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//Check if the two users are friends or not
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if(CS::get()->components->friends->are_friend($userID, $targetID))
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//Users are friends
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return $this::VISIBILITY_FRIENDS;
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else
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//Users are not friend
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return $this::VISIBILITY_PUBLIC;
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}
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/**
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* Get a list of post of a user
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*
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* @param int $userID The ID of the user making the request
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* @param int $targetID The ID of the target user
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* @param int $startPoint The startpoint for the request (0 stands for none)
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* @param int $limit The maximum number of messages to fetch
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*/
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public function getUserPosts(int $userID, int $targetID, int $startPoint = 0, int $limit = 10) : array {
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//Check the value of limit (security)
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if($limit < 1){
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throw new Exception("The limit of the query must absolutly be positive !");
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}
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//Get user visibility level
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$visibilityLevel = $this->getUserVisibility($userID, $targetID);
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//Prepare the request on the database
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$conditions = "WHERE ID_personne = ? AND (";
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$dataConds = array($targetID);
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//Add the visibility level conditions
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$conditions .= "(niveau_visibilite <= ?)";
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$dataConds[] = $visibilityLevel;
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//If user is signed in, include all the posts that he has created
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if($userID > 0){
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$conditions .= " OR (ID_amis = ?) ";
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$dataConds[] = $userID;
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}
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//Close permissions conditions
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$conditions .= ")";
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//Add startpoint condition if required (and get older messages)
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if($startPoint != 0){
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$conditions .= " AND ID <= ? ";
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$dataConds[] = $startPoint;
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}
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//Specify order and limit
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$conditions.= " ORDER BY ID DESC LIMIT ".$limit;
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//Perform the request
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$list = CS::get()->db->select(
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$this::TABLE_NAME,
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$conditions,
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$dataConds
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);
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//Check if the user allow comments on his page or not
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$getComments = CS::get()->components->user->allowComments($targetID);
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//Parse posts
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$posts = array();
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foreach($list as $post){
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$posts[] = $this->parse_post($post, $getComments);
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}
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return $posts;
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}
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/**
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* Check whether a post exists or not
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*
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* @param int $postID The ID of the post to check
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* @return bool TRUE if the post exists / FALSE else
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*/
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public function exist(int $postID) : bool {
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//Perform a request on the database
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return CS::get()->db->count($this::TABLE_NAME, "WHERE ID = ?", array($postID)) != 0;
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}
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/**
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* Get the access level of a user about a post
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*
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* @param int $postID The ID of the post to get
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* @param int $userID The ID of the user to check
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* @return int The access level over the post
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*/
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public function access_level(int $postID, int $userID) : int {
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//Get informations about the post
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$post_infos = $this->get_single($postID);
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//Check if the user is the owner of the post
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if($post_infos['userID'] == $userID)
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return $this::FULL_ACCESS;
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//Check if the post was made on the user page
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if($post_infos["user_page_id"] == $userID)
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return $this::INTERMEDIATE_ACCESS;
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//Check if the post is private
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if($post_infos["visibility_level"] == $this::VISIBILITY_USER)
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return $this::NO_ACCESS;
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//Check if the post is for friends only
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if($post_infos["visibility_level"] == $this::VISIBILITY_FRIENDS){
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//Check if user is signed in
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if($userID == 0)
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return $this::NO_ACCESS;
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//Check if this user and the owner of the page are friends or not
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else if(!CS::get()->components->friends->are_friend($userID, $post_infos['user_page_id']))
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return $this::NO_ACCESS;
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else
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//User can access the post
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return $this::BASIC_ACCESS;
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}
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//Check if the post is public
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if($post_infos['visibility_level'] == $this::VISIBILITY_PUBLIC){
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//Check if the two personns are friend
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if($userID != 0){
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if(CS::get()->components->friends->are_friend($userID, $post_infos['user_page_id']))
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return $this::BASIC_ACCESS;
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}
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//Get user visibility level
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$visibilityLevel = CS::get()->components->user->getVisibility($post_infos['user_page_id']);
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//If the page is open, access is free
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if($visibilityLevel == User::USER_PAGE_OPEN)
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return $this::BASIC_ACCESS;
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//Else check if the user is signed in and the page is public
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else if($userID != 0 AND $visibilityLevel == User::USER_PAGE_PUBLIC)
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return $this::BASIC_ACCESS;
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else
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return $this::NO_ACCESS;
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}
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//Not implemented
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return $this::NO_ACCESS;
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}
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/**
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* Fetch a single post from the database
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*
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* @param int $postID The ID of the post to get
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* @return array Informations about the post / empty array
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* if the post was not found
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*/
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private function get_single(int $postID) : array {
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//Perform a request on the database
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$conditions = "WHERE ID = ?";
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$values = array($postID);
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$result = CS::get()->db->select($this::TABLE_NAME, $conditions, $values);
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//Check if we got a response
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if(count($result) == 0)
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return array(); //Empty array = error
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//Return parsed response
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return $this->parse_post($result[0], false);
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}
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/**
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* Parse a user post from the database into
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* the standardized version of post structure
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*
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* @param array $src Informations about the post from the database
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* @param bool $load_comments Get comments, if required
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* @return array Parsed informations about the post
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*/
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private function parse_post(array $src, bool $load_comments) : array {
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$info = array();
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//Specify post ID
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$info["ID"] = $src["ID"];
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//Determine user ID
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$info["userID"] = $src["ID_amis"] == 0 ? $src["ID_personne"] : $src["ID_amis"];
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//Determine user page ID
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$info["user_page_id"] = $src["ID_personne"];
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//Time when the message was sent
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$info["post_time"] = strtotime($src["date_envoi"]);
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//Content of the message
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$info["content"] = $src["texte"];
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//Visibility level
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$info["visibility_level"] = $src["niveau_visibilite"];
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//Determine the kind of post
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$info["kind"] = $this::POSTS_TYPE[$src["type"]];
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//Document info
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$info["file_size"] = $src["size"];
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$info["file_type"] = $src["file_type"];
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$info["file_path"] = $src["path"];
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$info["file_path_url"] = $src["path"] == null ? null : path_user_data($src["path"], false);
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//Video specific
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$info["video_id"] = $src["idvideo"];
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//Get informations about the video
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if(!is_null($info['video_id'])){
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$info['video_infos'] = CS::get()->components->movies->get_infos($info['video_id']);
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}
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else {
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$info['video_infos'] = null;
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}
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//Countdown timer specific
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if($src['annee_fin'] != 0)
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$info["time_end"] = strtotime($src["annee_fin"]."/".$src['mois_fin']."/".$src["jour_fin"]);
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else
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$info["time_end"] = null;
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//Weblink specific
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$info["link_url"] = $src["url_page"];
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$info["link_title"] = $src["titre_page"];
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$info["link_description"] = $src["description_page"];
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$info["link_image"] = $src["image_page"];
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//Survey specific
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if($info['kind'] == "survey"){
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$info["data_survey"] = CS::get()->components->survey->get_infos($info['ID']);
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}
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else {
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$info["data_survey"] = null;
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}
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//Get informations about likes
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$info["likes"] = CS::get()->components->likes->count($info["ID"], Likes::LIKE_POST);
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$info["userlike"] = user_signed_in() ? CS::get()->components->likes->is_liking(userID, $info["ID"], Likes::LIKE_POST) : false;
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//Load comments, if required
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if($load_comments)
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$info["comments"] = CS::get()->components->comments->get($info["ID"]);
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else
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$info["comments"] = null;
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return $info;
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}
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}
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//Register component
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Components::register("posts", new Posts()); |