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Make the PHP Script Better with error management

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remotes/origin/database-api-implementation
Dorian HODIN 2 years ago committed by felixmielcarek
parent 9929a1cf03
commit 20dddd3705
4 changed files with 55 additions and 63 deletions
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16
Sources/php_script/script/config.php
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@ -1,13 +1,13 @@
<?php <?php
$username="dafldev"; $username="dafldev"; //Get the username
$host="89.83.53.34"; $host="89.83.53.34"; //Get the address IP of the hosting machine
$password="wrap"; $password="wrap"; //Get the password for the user selected
$db_name="positiondaflmusic"; $db_name="positiondaflmusic"; //Get the name of the database
$connect=mysqli_connect($host,$username,$password,$db_name); $connect=mysqli_connect($host,$username,$password,$db_name); //Connecting to database
if (mysqli_connect_errno()) { if (mysqli_connect_errno()) { //Check if the connection failed
print(json_encode("Failed to connect to MySQL")); print(json_encode("Failed to connect to MySQL")); //Return a json string, so the dart script can interpret the error
exit(-1); exit(-1); //Send a return code as -1, so insert.php can know if the connection is successful
} }

10
Sources/php_script/script/db.php
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@ -1,10 +0,0 @@
<?php
$dns = 'mysql:host=89.83.53.34;dbname=positiondaflmusic';
$user = 'dafldev';
$password = 'wrap';
try{
$db = new PDO ($dns, $user, $password);
}catch( PDOException $e){
$error = $e->getMessage();
echo $error;
}

90
Sources/php_script/script/distance.php
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@ -2,54 +2,56 @@
function meters($lat1, $lng1, $lat2, $lng2): float function meters($lat1, $lng1, $lat2, $lng2): float
{ {
// Radius of the Earth in meters : $earth_radius = 6378137; // Radius of the Earth in meters :
$earth_radius = 6378137; $rlo1 = deg2rad($lng1); //Transform the coordinate longitude1 from degree to radian
// Calculation of the distance between 2 GPS coordinates: $rla1 = deg2rad($lat1); //Transform the coordinate latitude1 from degree to radian
$rlo1 = deg2rad($lng1); $rlo2 = deg2rad($lng2); //Transform the coordinate longitude2 from degree to radian
$rla1 = deg2rad($lat1); $rla2 = deg2rad($lat2); //Transform the coordinate latitude2 from degree to radian
$rlo2 = deg2rad($lng2); $dlo = ($rlo2 - $rlo1) / 2; //Stock in $dlo the result of the calcul : ($rlo2 - $rlo1) / 2
$rla2 = deg2rad($lat2); $dla = ($rla2 - $rla1) / 2; //Stock in $dla the result of the calcul : ($rla2 - $rla1) / 2
$dlo = ($rlo2 - $rlo1) / 2; $a = (sin($dla) * sin($dla)) + cos($rla1) * cos($rla2) * (sin($dlo) * sin($dlo)); //Do some operations to return the distance in meters
$dla = ($rla2 - $rla1) / 2; $d = 2 * atan2(sqrt($a), sqrt(1 - $a)); //Do some operations to return the distance in meters
$a = (sin($dla) * sin($dla)) + cos($rla1) * cos($rla2) * (sin($dlo) * sin($dlo)); return round($earth_radius * $d); // Return the distance in meters between 2 GPS points
$d = 2 * atan2(sqrt($a), sqrt(1 - $a)); }
// Return the distance in meters between 2 GPS points $connect=""; //Else PHP send an error, "connect don't exist", but that work anyway, this is just to remove a fake error
return round($earth_radius * $d); $res=include "config.php"; //$res get the result of the calling of "config.php"
if ($res != 1){ //Check if config.php work
print (json_encode("Failed to connect to MySQL")); //Return a json string, so the dart script can interpret the error
}
if (!empty($_POST)) {
$id = $_POST['id']; //Get the result of the POST method in id
$query = 'SELECT * FROM gps'; //Browse all the database
$results = mysqli_query($connect, $query); //Execute the SQL command
$lat1 = 0; //Set $lat1 to test if the user exist
$lng1 = 0; //Set $lng1 to test if the user exist
$listUser = []; //Set the listUser to an empty list
while ($row = $results->fetch_row()){ //For all the row in the database
if (strcmp($row[0], $id) == 0) { //If the user is found in the database
$lat1 = $row[1]; //Set $lat1 to the latitude of the current user
$lng1 = $row[2]; //Set $lng1 to the longitude of the current user
}
}
if ($lat1 == 0 && $lng1 == 0) { //Check if the user get found in the database
print(json_encode("ERROR No user found in the database")); //Return a json string, so the dart script can interpret the error
exit(1); //Exit the actual script
}
$results = mysqli_query($connect, $query); //Execute again the SQL command to restart the fetch_row()
while ($row = $results->fetch_row()) { //For all the row in the database
if (strcmp($row[0], $id) != 0) { //If the row is not the row of the current user
$lat2 = $row[1]; //Set $lat2 to the latitude of the user who is in the actual row
$lng2 = $row[2]; //Set $lng2 to the latitude of the user who is in the actual row
$userID = $row[0]; //Set $userID to the username of the user who is in the actual row
$idMusic = $row[3]; //Set $idMusic to the id of the actual song of the user who is in the actual row
$dist = meters($lat1, $lng1, $lat2, $lng2); //With the function meters, calcul of the distance between the current user and the user who is in the actual row
if ($dist <= 100) { //If the user in the actual row is less than 100 meters away of the current user
$listUser[] = ['user' => $userID, 'music' => $idMusic]; //Add the username and the ID of the song that user who is in the actual row is listening
} }
$connect="";
include "config.php";
$id = $_POST['id'];
$query = 'SELECT * FROM gps';
$stm = $connect->prepare($query);
$stm->execute();
$row = $stm->fetchAll(PDO::FETCH_ASSOC);
$lat1=0;
$lng1=0;
$listUser=[];
Foreach ($row as $col) {
if (strcmp($col['id'], $id) == 0) {
$lat1 = $col['latitude'];
$lng1 = $col['longitude'];
}
}
if ($lat1==0 && $lng1==0){
print(json_encode("ERROR No user found in the database"));
exit(1);
} }
Foreach ($row as $col) {
if (strcmp($col['id'],$id)!=0) {
$lat2 = $col['latitude'];
$lng2 = $col['longitude'];
$userID = $col['id'];
$idMusic = $col['idMusic'];
$dist = meters($lat1, $lng1, $lat2, $lng2);
if ($dist <= 100) {
$listUser[] = ['user' => $userID, 'music' => $idMusic]; }
} }
print(json_encode($listUser)); //Return a json string of the list listUser
}else{ //If the method POST return nothing
print (json_encode("The POST didn't return any values")); //Return a json string, so the dart script can interpret the error
} }
print(json_encode($listUser));

2
Sources/php_script/script/insert.php
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@ -22,5 +22,5 @@ if (!empty($_POST)) {
VALUES('$id','$latitude','$longitude','$idMusic',CURRENT_TIMESTAMP);"; //Insert into the database the new data and new information about this user VALUES('$id','$latitude','$longitude','$idMusic',CURRENT_TIMESTAMP);"; //Insert into the database the new data and new information about this user
$results = mysqli_query($connect, $query); //Execute the SQL command $results = mysqli_query($connect, $query); //Execute the SQL command
}else{ //If the method POST return nothing }else{ //If the method POST return nothing
print (json_encode("The POST method failed")); //Return a json string, so the dart script can interpret the error print (json_encode("The POST didn't return any values")); //Return a json string, so the dart script can interpret the error
} }
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