Add backup for newsletter table

.gitignore

@@ -32,6 +32,7 @@ scripts/architecture
 scripts/update_dataset/backup/general/*.sql
 scripts/update_dataset/backup/votes_datan/*.sql
 scripts/update_dataset/backup/users/*.sql
+scripts/update_dataset/backup/newsletter/*.sql
 
 #assets folder
 assets/opendata

scripts/exportSql-newsletter.php

@@ -0,0 +1,112 @@
+<?php
+
+define("MAX_EXECUTION_TIME", -1); // seconds
+ini_set('memory_limit', '-1');
+
+$timeline = time() + MAX_EXECUTION_TIME;
+
+EXPORT_TABLES($_SERVER['DATABASE_HOST'], $_SERVER['DATABASE_USERNAME'], $_SERVER['DATABASE_PASSWORD'], $_SERVER['DATABASE_NAME'], array("newsletter"));
+
+function EXPORT_TABLES($host, $user, $pass, $name, $tables = false, $backup_name = false)
+{
+    $tablesData = array(
+      'newsletter'
+    );
+    $mysqli = new mysqli($host, $user, $pass, $name);
+    $mysqli->select_db($name);
+    $mysqli->query("SET NAMES 'utf8'");
+    $queryTables = $mysqli->query('SHOW TABLES');
+    while ($row = $queryTables->fetch_row())
+    {
+        $target_tables[] = $row[0];
+    }
+    if ($tables !== false)
+    {
+        $target_tables = array_intersect($target_tables, $tables);
+    }
+    try
+    {
+        foreach ($target_tables as $table)
+        {
+          if (in_array($table, $tablesData)) {
+            $result = $mysqli->query('SELECT * FROM ' . $table);
+            $fields_amount = $result->field_count;
+            $rows_num = $mysqli->affected_rows;
+            $res = $mysqli->query('SHOW CREATE TABLE ' . $table);
+            $TableMLine = $res->fetch_row();
+            $content = (!isset($content) ? '' : $content) . "\n\n" . $TableMLine[1] . ";\n\n";
+            for ($i = 0, $st_counter = 0; $i < $fields_amount; $i ++, $st_counter = 0)
+            {
+                while ($row = $result->fetch_row())
+                { //when started (and every after 100 command cycle):
+                    if ($st_counter % 100 == 0 || $st_counter == 0)
+                    {
+                        $content .= "\nINSERT INTO " . $table . " VALUES";
+                    }
+                    $content .= "\n(";
+                    for ($j = 0; $j < $fields_amount; $j ++)
+                    {
+                        $row[$j] = str_replace("\n", "\\n", addslashes($row[$j]));
+                        if (isset($row[$j]))
+                        {
+                            $content .= '"' . $row[$j] . '"';
+                        } else
+                        {
+                            $content .= '""';
+                        }
+                        if ($j < ($fields_amount - 1))
+                        {
+                            $content .= ',';
+                        }
+                    }
+                    $content .= ")";
+                    //every after 100 command cycle [or at last line] ....p.s. but should be inserted 1 cycle eariler
+                    if ((($st_counter + 1) % 100 == 0 && $st_counter != 0) || $st_counter + 1 == $rows_num)
+                    {
+                        $content .= ";";
+                    } else
+                    {
+                        $content .= ",";
+                    }
+                    $st_counter = $st_counter + 1;
+                }
+            }
+            $content .= "\n\n\n";
+          } else {
+            $res = $mysqli->query('SHOW CREATE TABLE ' . $table);
+            $TableMLine = $res->fetch_row();
+            $content = (!isset($content) ? '' : $content) . "\n\n" . $TableMLine[1] . ";\n\n";
+            $content .= "\n\n\n";
+          }
+        }
+    } catch (Exception $e)
+    {
+        echo 'Caught exception: ', $e->getMessage(), "\n";
+    }
+    $backup_name = $backup_name ? $backup_name : $name . "_votes_datan_backup_" . date('Y-m-d') . ".sql";
+    //header('Content-Type: application/octet-stream');
+    //header("Content-Transfer-Encoding: Binary");
+    //header("Content-disposition: attachment; filename=\"" . $backup_name . "\"");
+    //echo $content;
+
+    // NEW SYSTEM ==> Save the file in the update_dataset/backup folder
+
+    $date = date("Y-m-d");
+    $file = 'update_dataset/backup/newsletter/' . date("Ymd") .'.sql';
+
+    if(!is_file($file)){
+      file_put_contents($file, "");
+
+      $contentFinal = " /* DATABASE BACKUP FOR THE newsletter TABLE \n";
+      $contentFinal .= " Date of the backup: " . $date . " */ \n";
+      $contentFinal .= $content;
+
+      file_put_contents($file, $contentFinal);
+    } else {
+      die("File alreay exists!");
+    }
+
+    exit;
+}
+
+?>