mirror of
https://github.com/pierre42100/ComunicAPI
synced 2024-12-26 05:28:57 +00:00
593 lines
18 KiB
PHP
Executable File
593 lines
18 KiB
PHP
Executable File
<?php
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/*
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* The MIT License
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*
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* Copyright 2016 Pierre HUBERT.
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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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/**
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* DB access and R/W
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* Currently supports the following DataBases types :
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* - sqlite
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* - mysql
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*
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* If you would like to add support for different services, dont hesitate to
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* participate.
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*
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* @author Pierre HUBERT
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*/
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class DBLibrary {
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/**
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* @var Boolean $connected Say if we are already connected or not.
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*/
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private $connected = false;
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/**
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* @var PDO $db The DataBase ojbect
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*/
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private $db;
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/**
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* @var Boolean Enable or not verbosing mode
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*/
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private $verbose = false;
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/**
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* Class constructor
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*
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* @param Boolean $verbose Enable or not the inclusion of SQL requests in Exceptions
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*/
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public function __construct($verbose = false){
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//Saving verbose mode
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$this->verbose = $verbose;
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}
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/**
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* Open a MySQL database
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*
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* @param String $host MySQL Server Name
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* @param String $username MySQL username
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* @param String $password MySQL password
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* @param String $nameDB Name of the DataBase
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*/
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public function openMYSQL($host, $username, $password, $nameDB){
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//Generating PDO params
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$pdoParams = "mysql:host=".$host.";dbname=".$nameDB;
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$credentials = array(
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"username" => $username,
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"password" => $password
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);
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//Opening DataBase
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$this->openDB($pdoParams, $credentials);
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}
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/**
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* Open a SQLite DataBase
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*
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* @param String $pathToDB The path to SQLITE DB
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* @return nothing
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*/
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public function openSQLite($pathToDB){
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//We check the type of file if it exists
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if(file_exists($pathToDB)){
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$finfo = finfo_open(FILEINFO_MIME_TYPE);
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if(finfo_file($finfo, $pathToDB) != "application/octet-stream"){
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exit("Error: Trying to open a "
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. "non-application/octet-stream type file !");
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}
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}
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//Generating PDO params
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$pdoParams = "sqlite:".$pathToDB;
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//Opening DataBase
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$this->openDB($pdoParams);
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}
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/**
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* Open a database (generic function)
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*
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* Use this for debugging :
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* $this->db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
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*
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* @param String $pdoParams Informations about the DataBase to open
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* @param Array $credentials The username and password (optionnal)
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* @return nothing
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*/
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private function openDB($pdoParams, array $credentials = array()){
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try{
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//We check if any DB is already opened
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if($this->checkOpenDB()){
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//We run into an error
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throw new Exception("Trying to open a database "
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. "while another is already opened !");
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}
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//We open DataBase
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if(count($credentials) == "")
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$this->db = new PDO($pdoParams);
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else
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$this->db = new PDO($pdoParams,
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$credentials['username'],
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$credentials['password']);
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}
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catch (Exception $e){
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exit($this->echoException($e));
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}
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catch(PDOException $e){
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exit($this->echoPDOException($e));
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}
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//We set the connected var to yes
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$this->connected = true;
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//We set PDO to return errors in verbose mode
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if($this->verbose)
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$this->db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
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}
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/**
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* Return the DataBase Object
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*
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* @return PDO The DataBase object
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*/
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public function getDBobject(){
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return $this->db;
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}
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/**
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* Check if another DB is already opened
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*
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* @return Boolean True or false depending of the opened state
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*/
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private function checkOpenDB(){
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if($this->connected){
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return true;
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}
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//No database opened yet
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return false;
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}
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/**
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* Execute SQL code to the DataBase
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*
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* @param String $sql The SQL to execute
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* @return Integer Number of lines affected
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*/
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public function execSQL($sql){
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//We check if any database is opened
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if (!$this->checkOpenDB()) {
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return false;
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}
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//We try to perform the task
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try{
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return $this->db->exec($sql);
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} catch (PDOException $e) {
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exit($this->echoPDOException($e));
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}
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}
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/**
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* Add a line to a table of the database
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*
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* @param String $tableName The name of the table
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* @param Array $values The fields values
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* @return Boolean True or false depending of the success of the operation
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*/
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public function addLine($tableName, array $values){
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//We try to perform the task
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try{
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//We check if any database is opened
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if (!$this->checkOpenDB()) {
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throw new Exception("There isn't any opened DataBase !");
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}
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//Generating SQL command
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$sql = "INSERT INTO ".$tableName." ";
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//Adding parametres
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$valuesDatas = $this->generateSQLfromValuesInsert($values);
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$sql .= $valuesDatas['sql'];
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//Preparing insertion
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$insert = $this->db->prepare($sql);
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$result = $insert->execute($valuesDatas['params']);
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//Checking presence of errors
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if(!$result){
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$message = "An error occured while trying to add a line !";
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$message .= ($this->verbose ? "\n<i>SQL : ".$sql."</i>" : "");
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throw new Exception($message);
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}
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//Everything is OK
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return true;
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}
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catch(Exception $e){
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exit($this->echoException($e));
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}
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catch(PDOException $e){
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exit($this->echoPDOException($e));
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}
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}
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/**
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* Add more than one line to a table
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*
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* @param String $tableName The name of the table
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* @param array $values The values of the lines
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*/
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public function addLines($tableName, array $values){
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//We try to perform the task
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try{
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//We check if any database is opened
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if (!$this->checkOpenDB()) {
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throw new Exception("There isn't any opened DataBase !");
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}
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//Processing each line
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foreach($values as $process){
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if(is_array($process)){
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if(!$this->addLine($tableName, $process)){
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throw new Exception("An error occured while trying to "
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. "add a line !");
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}
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}
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else{
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throw new Exception("A string has been given instead of an"
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. " array !");
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}
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}
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}
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catch(Exception $e){
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exit($this->echoException($e));
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}
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}
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/**
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* Generates SQL code for editing DataBase for insert-like SQL commands
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*
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* @param array $values The values for the SQL command
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* @return Array The SQL + the parametres
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*/
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private function generateSQLfromValuesInsert(array $values){
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//Initialisating vars
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$sql = "(";
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$params = array();
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//Processing values
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foreach($values as $name => $value){
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//We add a coma if it is not the first value
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$sql .= ((count($params) != 0) ? ", " : "");
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//We add SQL for the name
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$sql .= $name;
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//Records the name parameters
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$params[] = $value;
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}
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//Continuing SQL
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$sql .= ") VALUES (";
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//Adding ? for each value
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for($i = 0; $i<count($params); $i++){
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$sql .= ($i != 0 ? ", " : "")."?";
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}
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//Finishing SQL
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$sql .= ") ";
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//Preparing return
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$return = array(
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"sql" => $sql,
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"params" => $params
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);
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//Returning values
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return $return;
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}
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/**
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* Get the last inserted ID of a cursor
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*
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* @param Nothing
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* @return Integer The last inserted ID (0 for a failure)
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*/
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public function getLastInsertedID(){
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try {
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//Get & return last inserted ID
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return $this->db->lastInsertId();
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}
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catch(Exception $e){
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exit($this->echoException($e));
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}
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catch(PDOException $e){
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exit($this->echoPDOException($e));
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}
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}
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/**
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* Get datas from a table
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*
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* @param String $tableName The name of the table
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* @param String $conditions The conditions
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* @param Array $datasCond The values of condition
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* @param Array $fieldsList Optionnal, specify the fields to select during the request.
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* @return Array The result
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*/
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public function select($tableName, $conditions = "", array $datasCond = array(), array $fieldsList = array()){
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//We try to perform the task
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try{
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//We check if any database is opened
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if (!$this->checkOpenDB()) {
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throw new Exception("There isn't any opened DataBase !");
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}
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//Process fields to select
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if(count($fieldsList) == 0)
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$fields = "*";
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else {
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$fields = implode(", ", $fieldsList);
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}
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//Generating SQL
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$sql = "SELECT ".$fields." FROM ".$tableName." ".$conditions;
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$selectOBJ = $this->db->prepare($sql);
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$selectOBJ->execute($datasCond);
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//Preparing return
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$return = array();
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foreach($selectOBJ as $process){
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$result = array();
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//Processing datas
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foreach($process as $name => $data){
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//We save the data only if it is not an integer
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if (!is_int($name)) {
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$result[$name] = $data;
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}
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}
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//Saving result
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$return[] = $result;
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}
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//Returning result
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return $return;
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}
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catch(Exception $e){
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exit($this->echoException($e));
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}
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catch(PDOException $e){
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exit($this->echoPDOException($e));
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}
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}
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/**
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* Count number of entries matching conditions
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*
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* @param String $tableName The name of the table
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* @param String $conditions The conditions
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* @param Array $datasCond The values of condition
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* @return Integer The result
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*/
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public function count($tableName, $conditions = "", array $datasCond = array()){
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//We try to perform the task
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try{
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//We check if any database is opened
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if (!$this->checkOpenDB()) {
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throw new Exception("There isn't any opened DataBase !");
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}
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//Generating SQL
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$sql = "SELECT COUNT(*) AS resultNumber FROM ".$tableName." ".$conditions;
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$selectOBJ = $this->db->prepare($sql);
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$selectOBJ->execute($datasCond);
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//Preparing return
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foreach($selectOBJ as $process){
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$return = $process;
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}
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//Returning result
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return $return['resultNumber'];
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}
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catch(Exception $e){
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exit($this->echoException($e));
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}
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catch(PDOException $e){
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exit($this->echoPDOException($e));
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}
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}
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/**
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* Update a Table
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*
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* @param String $tableName The name of the table
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* @param String $conditions The conditions to limit the edition
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* @param Array $modifs The modifications
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* @param Array $whereValues The values of the WHERE condition
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* @return Boolean Returns true if succeed.
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*/
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public function updateDB($tableName, $conditions, array $modifs, array $whereValues){
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//We try to perform the task
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try{
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//We check if any database is opened
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if (!$this->checkOpenDB()) {
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throw new Exception("There isn't any opened DataBase !");
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}
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//Generating SQL for changes
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$modifValues = array();
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$sqlChange = "";
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foreach($modifs as $name=>$value){
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$sqlChange .= ($sqlChange != "" ? ", " : "").$name." = ?";
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//Saving data
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$modifValues[] = $value;
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}
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//Adding condition values to the liste of query
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$datasQuery = array_merge_recursive($modifValues, $whereValues);
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//Generating SQL
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$sql = "UPDATE ".$tableName." SET ".$sqlChange." WHERE ".$conditions;
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//Executing SQL
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$edit = $this->db->prepare($sql);
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//Trying to perform action
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if(!$edit->execute($datasQuery)) {
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$message = "Unable to perform UPDATE SQL ! <br />";
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$message .= ($this->verbose ? "\n<i>SQL : ".$sql."</i>" : "");
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throw new Exception($message);
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}
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//Returns true if succeed
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return true;
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}
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catch(Exception $e){
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exit($this->echoException($e));
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}
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catch(PDOException $e){
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exit($this->echoPDOException($e));
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}
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}
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/**
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* Delete entrie(s) from a table
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*
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* @param String $tableName The name of the table
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* @param String $conditions The conditions to perform action
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* @param Array $conditionsValues The values of condition
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* @return Boolean True if succeed
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*/
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public function deleteEntry(string $tableName, $conditions = false, array $conditionsValues = array()) : bool {
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//We try to perform the task
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try{
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//We check if any database is opened
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if (!$this->checkOpenDB()) {
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throw new Exception("There isn't any opened DataBase !");
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}
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//Generating SQL
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$sql = "DELETE FROM ".$tableName;
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$sql .= ($conditions ? " WHERE ".$conditions : "");
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//Preparing request
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$delete = $this->db->prepare($sql);
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//Trying to perform action
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if(!$delete->execute($conditionsValues)) {
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$message = "Unable to perform DELETE SQL ! <br />";
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$message .= ($this->verbose ? "\n<i>SQL : ".$sql."</i>" : "");
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throw new Exception($message);
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}
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//Returns true if succeed
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return true;
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}
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catch(Exception $e){
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exit($this->echoException($e));
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}
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catch(PDOException $e){
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exit($this->echoPDOException($e));
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}
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}
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/**
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* Convert an array of conditions into a condition string and an array of conditions values
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*
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* @param array $conditions The conditions to convert
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* @return array The result
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*/
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public function splitConditionsArray(array $conditions) : array {
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//Create the string
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$sql = "";
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$values = array();
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//Process each element
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foreach($conditions as $field => $value){
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//Add AND separator if required
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if(strlen($sql) > 0)
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$sql .= " AND ";
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$sql .= $field . " = ?";
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$values[] = $value;
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}
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//Return the result
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return array($sql, $values);
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}
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/**
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* Echo an exception
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*
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* @param Exception $e The Exception
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*/
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private function echoException(Exception $e){
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$message = '<b>Exception in '.$e->getFile().' on line '.$e->getLine().' </b>: '.$e->getMessage();
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echo $message;
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//PDO informations
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if($this->verbose){
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echo "\n\n Call trace:";
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echo $e->getTraceAsString();
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echo "\n\n PDO last error:";
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print_r($this->db->errorInfo());
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}
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}
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/**
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* Echo a PDO exception
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*
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* @param PDOException $e The PDOException
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*/
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private function echoPDOException(PDOException $e){
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$message = '<b>Exception in '.$e->getFile().' on line '.$e->getLine().' </b>: '.$e->getMessage();
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echo $message;
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//PDO informations
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if($this->verbose){
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echo "\n\n Call trace:";
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echo $e->getTraceAsString();
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echo "\n PDO last error:";
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print_r($this->db->errorInfo);
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}
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}
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}
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