T1704011110

Database.php

@@ -6,6 +6,9 @@
  * Date: 02/03/2017
  * Time: 09:59
  */
+
+require_once('includes.inc.php');
+
 class Database
 {
     private $db;
@@ -14,6 +17,7 @@ class Database
         $this->db = pg_connect("host=".DATABASE_URL." dbname=".DATABASE_NAME." user=".DATABASE_USER." password=".DATABASE_PASSWORD);
     }
 
+    // Execute $sql unsing array $params as params when needed.
     function query($sql, $params = null) {
         $result = null;
         if($params) {
@@ -33,6 +37,7 @@ class Database
         return $query_response;
     }
 
+    // Create response to API request.
     function create_response($data, $error, $values = null) {
         $status_message = Database::create_status_code($error, $values);
         $meta = array('status'=>$error, 'message'=>$status_message);
@@ -40,6 +45,7 @@ class Database
         return $response_element_json;
     }
 
+    // Create status message from status code.
     function create_status_code($error, $values) {
         switch ($error) {
             case 0:

Question.php

@@ -0,0 +1,37 @@
+<?php
+
+/**
+ * Created by PhpStorm.
+ * User: leanderschmedemann
+ * Date: 01/04/2017
+ * Time: 10:08
+ */
+
+require_once('includes.inc.php');
+
+class Question
+{
+    private $question;
+    private $answers;
+    private $right_answer_position;
+
+    function __construct($offset, $db) {
+        $qid = $db->query('SELECT * FROM "Questions" ORDER BY "ID" OFFSET $1 LIMIT 1', array($offset));
+        $q = $db->query('SELECT "question" FROM "Questions" WHERE "ID" = $1', array($qid));
+        $a0 = $db->query('SELECT "answer0" FROM "Questions" WHERE "ID" = $1', array($qid));
+        $a1 = $db->query('SELECT "answer1" FROM "Questions" WHERE "ID" = $1', array($qid));
+        $a2 = $db->query('SELECT "answer2" FROM "Questions" WHERE "ID" = $1', array($qid));
+        $a3 = $db->query('SELECT "answer3" FROM "Questions" WHERE "ID" = $1', array($qid));
+        $cid = $db->query('SELECT "Categories_ID" FROM '
+        $this->question = $q;
+        $this->answers = array('a0' => $a0, 'a1' => $a1, 'a2' => $a2, 'a3' => $a3);
+        shuffle($this->answers);
+        $this->right_answer_position = array_search('a0', $this->answers);
+    }
+
+    // Create the question message for API.
+    function get_question() {
+
+    }
+
+}

includes.inc.php

@@ -11,5 +11,6 @@
 require_once('config.inc.php');
 require_once('header.inc.php');
 require_once('Database.php');
+require_once('Question.php');
 
 ?>

register.php

@@ -12,17 +12,17 @@
     $error = 0;
     $name = $_GET['name'];
     $uid = md5(uniqid(rand(), true));
-    $database = new Database();
+    $db = new Database();
 
-    $numbers = range(0, 19);
+    $v = $db->query('SELECT * FROM "Questions" ORDER BY "ID" OFFSET $1 LIMIT 1', array(0));
-    shuffle($numbers);
+    print $v;
-    for($i = 0; $i < 20; $i++){
-        print $numbers[$i];
-    }
 
     if(preg_match(PATTERN, $name) != 1 or !$name) {
         $error = 11101;
     } else {
+        // Create user.
+        $db->query('INSERT INTO "Users" ("ID", "name") VALUES ($1, $2)', array($uid, $name));
+        // Create error if user to create already exists.
         if(preg_match('/violates unique constraint "Users_name_unique"/', pg_last_error()) == 1) {
             $error = 11102;
         } else {

start.php

@@ -13,8 +13,15 @@
     $uid = $_GET['uid'];
     $length = $_GET['length'];
     $length = (($length === '0') || ($length && gettype(+$length) == 'integer')) ? +$_GET['length'] : 10;
-    $database = new Database();
+    $db = new Database();
-    $questions_count = $database->query('SELECT COUNT(*) FROM "Questions"')['data'][0]['count'];
+    $questions_count = $db->query('SELECT COUNT(*) FROM "Questions"')['data'][0]['count'];
+
+    // Return $count random, non repeating numbers in range from $min to $max.
+    function random_numbers($min, $max, $count){
+        $numbers = range($min, $max);
+        shuffle($numbers);
+        return array_slice($numbers, 0, $count-1);
+    }
 
     if($length == 0) {
         $error = 12101;
@@ -22,19 +29,20 @@
         $error = 12102;
         $values = array($questions_count);
     } else {
-        if($database->query('SELECT EXISTS (SELECT 1 FROM "Games" WHERE "ID" = $1)', array($uid)) == 't') {
+        // Delete existing game for user.
-            $database->query('DELETE FROM "Games" WHERE "ID" = $1', array($uid));
+        if($db->query('SELECT EXISTS (SELECT 1 FROM "Games" WHERE "ID" = $1)', array($uid)) == 't') {
+            $db->query('DELETE FROM "Games" WHERE "ID" = $1', array($uid));
         }
-        $database->query('INSERT INTO "Games" ("ID") VALUES ($1)', array($uid));
+        // Create new game for user.
-        for($i = 0; $i < $length; $i++) {
+        $db->query('INSERT INTO "Games" ("ID") VALUES ($1)', array($uid));
-            do {
+        // Find questions for new game and insert into table.
-                $offset = rand(0, $questions_count-1);
+        $questions = random_numbers(0, $questions_count-1, $length);
-                $question = $database->query('SELECT "ID" FROM "Questions" OFFSET $1 LIMIT 1', array($offset));
+        foreach($questions as $question) {
-                $database->query('INSERT INTO "GamesQuestions" ("Games_ID", "Questions_ID") VALUES ($1, $2)',
+            $q = $db->query('SELECT "ID" FROM "Questions" OFFSET $1 LIMIT 1', array($question));
-                    array($uid, $question));
+            $db->query('INSERT INTO "GamesQuestions" ("Games_ID", "Questions_ID") VALUES ($1, $2)', array($uid, $q));
-            } while(pg_last_error != '');
         }
     }
+
     $response = Database::create_response($data, $error, $values);
     print $response;
 ?>