<?php
/**
* name:API核心类
* update:2020/12
* author:xiaoz<xiaoz93@outlook.com>
* blog:xiaoz.me
*/
class Api {
protected $db;
public function __construct($db){
$this->db = $db;
//返回json类型
header('Content-Type:application/json; charset=utf-8');
}
/**
* name:创建分类目录
*/
public function add_category($token,$name,$property = 0,$weight = 0,$description = ''){
$this->auth($token);
$data = [
'name' => $name,
'add_time' => time(),
'weight' => $weight,
'property' => $property,
'description' => $description
];
//插入分类目录
$this->db->insert("on_categorys",$data);
//返回ID
$id = $this->db->id();
//如果id为空（NULL），说明插入失败了，姑且认为是name重复导致
if( empty($id) ){
$this->err_msg(-1000,'Categorie already exist!');
}
else{
//成功并返回json格式
$data = [
'code' => 0,
'id' => intval($id)
];
exit(json_encode($data));
}
}
/**
* 修改分类目录
*
*/
public function edit_category($token,$id,$name,$property = 0,$weight = 0,$description = ''){
$this->auth($token);
//如果id为空
if( empty($id) ){
$this->err_msg(-1003,'The category ID cannot be empty!');
}
//如果分类名为空
elseif( empty($name) ){
$this->err_msg(-1004,'The category name cannot be empty!');
}
//更新数据库
else{
$data = [
'name' => $name,
'up_time' => time(),
'weight' => $weight,
'property' => $property,
'description' => $description
];
$re = $this->db->update('on_categorys',$data,[ 'id' => $id]);
//var_dump( $this->db->log() );
//获取影响行数
$row = $re->rowCount();
if($row) {
$data = [
'code' => 0,
'msg' => 'successful'
];
exit(json_encode($data));
}
else{
$this->err_msg(-1005,'The category name already exists!');
}
}
}
/**
* 删除分类目录
*/
public function del_category($token,$id) {
//验证授权
$this->auth($token);
//如果id为空
if( empty($id) ){
$this->err_msg(-1003,'The category ID cannot be empty!');
}
//如果分类目录下存在数据
$count = $this->db->count("on_links", [
"fid" => $id
]);
//如果分类目录下存在数据，则不允许删除
if($count > 0) {
$this->err_msg(-1006,'The category is not empty and cannot be deleted!');
}
else{
$data = $this->db->delete('on_categorys',[ 'id' => $id] );
//返回影响行数
$row = $data->rowCount();
if($row) {
$data = [
'code' => 0,
'msg' => 'successful'
];
exit(json_encode($data));
}
else{
$this->err_msg(-1007,'The category delete failed!');
}
}
}
/**
* name:返回错误（json）
*
*/
protected function err_msg($code,$err_msg){
$data = [
'code' => $code,
'err_msg' => $err_msg
];
//返回json类型
header('Content-Type:application/json; charset=utf-8');
exit(json_encode($data));
}
/**
* name:验证方法
*/
protected function auth($token){
//计算正确的token：用户名 + TOKEN
$token_yes = md5(USER.TOKEN);
//如果token为空，则验证cookie
if(empty($token)) {
if( !$this->is_login() ) {
$this->err_msg(-1002,'Authorization failure!');
}
}
else if($token != $token_yes){
$this->err_msg(-1002,'Authorization failure!');
}
else{
return true;
}
}
/**
* name:添加链接
*/
public function add_link($token,$fid,$title,$url,$description = '',$weight = 0,$property = 0){
$this->auth($token);
$fid = intval($fid);
//检测链接是否合法
$this->check_link($fid,$title,$url);
//合并数据
$data = [
'fid' => $fid,
'title' => $title,
'url' => $url,
'description' => $description,
'add_time' => time(),
'weight' => $weight,
'property' => $property
];
//插入数据库
$re = $this->db->insert('on_links',$data);
//返回影响行数
$row = $re->rowCount();
//如果为真
if( $row ){
$id = $this->db->id();
$data = [
'code' => 0,
'id' => $id
];
exit(json_encode($data));
}
//如果插入失败
else{
$this->err_msg(-1011,'The URL already exists!');
}
}
/**
* name:修改链接
*/
public function edit_link($token,$id,$fid,$title,$url,$description = '',$weight = 0,$property = 0){
$this->auth($token);
$fid = intval($fid);
//检测链接是否合法
$this->check_link($fid,$title,$url);
//查询ID是否存在
$count = $this->db->count('on_links',[ 'id' => $id]);
//如果id不存在
if( (empty($id)) || ($count == false) ) {
$this->err_msg(-1012,'link id not exists!');
}
//合并数据
$data = [
'fid' => $fid,
'title' => $title,
'url' => $url,
'description' => $description,
'up_time' => time(),
'weight' => $weight,
'property' => $property
];
//插入数据库
$re = $this->db->update('on_links',$data,[ 'id' => $id]);
//返回影响行数
$row = $re->rowCount();
//如果为真
if( $row ){
$id = $this->db->id();
$data = [
'code' => 0,
'msg' => 'successful'
];
exit(json_encode($data));
}
//如果插入失败
else{
$this->err_msg(-1011,'The URL already exists!');
}
}
/**
* 删除链接
*/
public function del_link($token,$id){
//验证token是否合法
$this->auth($token);
//查询ID是否存在
$count = $this->db->count('on_links',[ 'id' => $id]);
//如果id不存在
if( (empty($id)) || ($count == false) ) {
$this->err_msg(-1010,'link id not exists!');
}
else{
$re = $this->db->delete('on_links',[ 'id' => $id] );
if($re) {
$data = [
'code' => 0,
'msg' => 'successful'
];
exit(json_encode($data));
}
else{
$this->err_msg(-1010,'link id not exists!');
}
}
}
/**
* 验证链接合法性
*/
protected function check_link($fid,$title,$url){
//如果父及（分类）ID不存在
if( empty($fid )) {
$this->err_msg(-1007,'The category id(fid) not exist!');
}
//如果父及ID不存在数据库中
//验证分类目录是否存在
$count = $this->db->count("on_categorys", [
"id" => $fid
]);
if ( empty($count) ){
$this->err_msg(-1007,'The category not exist!');
}
//如果链接标题为空
if( empty($title) ){
$this->err_msg(-1008,'The title cannot be empty!');
}
//链接不能为空
if( empty($url) ){
$this->err_msg(-1009,'URL cannot be empty!');
}
//链接不合法
if( !filter_var($url, FILTER_VALIDATE_URL) ) {
$this->err_msg(-1010,'URL is not valid!');
}
return true;
}
/**
* 查询分类目录
*/
public function category_list($page,$limit){
$offset = ($page - 1) * $limit;
//如果成功登录，则查询所有
if( $this->is_login() ){
$sql = "SELECT * FROM on_categorys ORDER BY weight DESC,id DESC LIMIT {$limit} OFFSET {$offset}";
}
else{
$sql = "SELECT * FROM on_categorys WHERE property = 0 ORDER BY weight DESC,id DESC LIMIT {$limit} OFFSET {$offset}";
}
//统计总数
$count = $this->db->count('on_categorys','*');
//原生查询
$datas = $this->db->query($sql)->fetchAll();
$datas = [
'code' => 0,
'msg' => '',
'count' => $count,
'data' => $datas
];
exit(json_encode($datas));
}
/**
* 查询链接
*/
public function link_list($page,$limit,$token = ''){
$offset = ($page - 1) * $limit;
//如果成功登录，但token为空
if( ($this->is_login()) && (empty($token)) ){
//统计总数
$count = $this->db->count('on_links','*');
$sql = "SELECT *,(SELECT name FROM on_categorys WHERE id = on_links.fid) AS category_name FROM on_links ORDER BY weight DESC,id DESC LIMIT {$limit} OFFSET {$offset}";
}
//如果token验证通过
elseif( (!empty($token)) && ($this->auth($token)) ) {
//统计总数
$count = $this->db->count('on_links','*');
$sql = "SELECT *,(SELECT name FROM on_categorys WHERE id = on_links.fid) AS category_name FROM on_links ORDER BY weight DESC,id DESC LIMIT {$limit} OFFSET {$offset}";
}
else{
//统计总数
$count = $this->db->count('on_links','*',[ 'property' => 0 ]);
$sql = "SELECT *,(SELECT name FROM on_categorys WHERE id = on_links.fid) AS category_name FROM on_links WHERE property = 0 ORDER BY weight DESC,id DESC LIMIT {$limit} OFFSET {$offset}";
}
//原生查询
$datas = $this->db->query($sql)->fetchAll();
$datas = [
'code' => 0,
'msg' => '',
'count' => $count,
'data' => $datas
];
exit(json_encode($datas));
}
/**
* 验证是否登录
*/
protected function is_login(){
$key = md5(USER.PASSWORD.'onenav');
//获取session
$session = $_COOKIE['key'];
//如果已经成功登录
if($session == $key) {
return true;
}
else{
return false;
}
}
/**
* 获取链接信息
*/
public function get_link_info($token,$url){
$this->auth($token);
//检查链接是否合法
//链接不合法
if( !filter_var($url, FILTER_VALIDATE_URL) ) {
$this->err_msg(-1010,'URL is not valid!');
}
//获取网站标题
$c = curl_init();
curl_setopt($c, CURLOPT_URL, $url);
curl_setopt($c, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($c, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($c, CURLOPT_SSL_VERIFYHOST, false);
//设置超时时间
curl_setopt($c , CURLOPT_TIMEOUT, 10);
$data = curl_exec($c);
curl_close($c);
$pos = strpos($data,'utf-8');
if($pos===false){$data = iconv("gbk","utf-8",$data);}
preg_match("/<title>(.*)<\/title>/i",$data, $title);
$link['title'] = $title[1];
//获取网站描述
$tags = get_meta_tags($url);
$link['description'] = $tags['description'];
$data = [
'code' => 0,
'data' => $link
];
exit(json_encode($data));
}
/**
* 获取IP
*/
//获取访客IP
protected function getIP() {
if (getenv('HTTP_CLIENT_IP')) {
$ip = getenv('HTTP_CLIENT_IP');
}
elseif (getenv('HTTP_X_FORWARDED_FOR')) {
$ip = getenv('HTTP_X_FORWARDED_FOR');
}
elseif (getenv('HTTP_X_FORWARDED')) {
$ip = getenv('HTTP_X_FORWARDED');
}
elseif (getenv('HTTP_FORWARDED_FOR')) {
$ip = getenv('HTTP_FORWARDED_FOR');
}
elseif (getenv('HTTP_FORWARDED')) {
$ip = getenv('HTTP_FORWARDED');
}
else {
$ip = $_SERVER['REMOTE_ADDR'];
}
return $ip;
}
//
}