some changes

README.md

@@ -5,11 +5,17 @@ Import users into Drupal 8 from CSV file upload.
 
 This module currently assumes the following:
 
+- Field: uid (int)
 - Field: field_name_first (string)
 - Field: field_name_last (string)
+- Field: email (string)
+- Field: username (string)
+- Field: password (string)
 - CSV: In the following format:
     ```
-    fname,lname,email
+   uid,fname,lname,email,username,password
     ```
-
-Usernames are generated from first+last+any digits to make name unique.
+CSV may not contain someone of the next fields: uid, username and password.
+-Usernames are generated from first+last+any digits to make name unique.
+-Password null
+-Uid automatic

src/Controller/UserImportController.php

@@ -44,37 +44,51 @@ public static function processUpload(File $file, array $config) {
     return $created;
   }
 
-  /**
-   * Prepares a new user from an upload row and current config.
-   *
-   * @param $row
-   *   A row from the currently uploaded file.
-   *
-   * @param $config
-   *   An array of configuration containing:
-   *   - roles: an array of role ids to assign to the user
-   *
-   * @return array
-   *   New user values suitable for User::create().
-   */
+    /**
+     * Prepares a new user from an upload row and current config.
+     *
+     * @param array $row
+     *   A row from the currently uploaded file.
+     *
+     * @param array $config
+     *   An array of configuration containing:
+     *   - roles: an array of role ids to assign to the user
+     * @return array New user values suitable for User::create().
+     * New user values suitable for User::create().
+     */
   public static function prepareRow(array $row, array $config) {
-    $preferred_username = (strtolower($row[0] . $row[1]));
-    $i = 0;
-    while (self::usernameExists($i ? $preferred_username . $i : $preferred_username)) {
-      $i++;
+    if(empty(array_filter($config['opt']))){
+        $preferred_username = (strtolower($row[1] . $row[2]));
+        $i = 0;
+        while (self::usernameExists($i ? $preferred_username . $i : $preferred_username)) {
+          $i++;
+        }
+        $username = $i ? $preferred_username . $i : $preferred_username;
+        return [
+          'uid' => NULL,
+          'name' => $username,
+          'field_name_first' => $row[1],
+          'field_name_last' => $row[2],
+          'pass' => NULL,
+          'mail' => $row[3],
+          'status' => 1,
+          'created' => REQUEST_TIME,
+          'roles' => array_values($config['roles']),
+        ];
+    }else{
+        $username = (strtolower($row[4]));
+        return [
+            'uid' => $row[0],
+            'name' => $username,
+            'field_name_first' => $row[1],
+            'field_name_last' => $row[2],
+            'pass' => $row[5],
+            'mail' => $row[3],
+            'status' => 1,
+            'created' => REQUEST_TIME,
+            'roles' => array_values($config['roles']),
+        ];
     }
-    $username = $i ? $preferred_username . $i : $preferred_username;
-    return [
-      'uid' => NULL,
-      'name' => $username,
-      'field_name_first' => $row[0],
-      'field_name_last' => $row[1],
-      'pass' => NULL,
-      'mail' => $row[2],
-      'status' => 1,
-      'created' => REQUEST_TIME,
-      'roles' => array_values($config['roles']),
-    ];
   }
 
   /**

src/Form/UserImportForm.php

@@ -65,6 +65,19 @@ public function buildForm(array $form, FormStateInterface $form_state) {
         'file_validate_extensions' => ['csv']
       ]
     ];
+      // Includes uid, username and password?
+    $form['#tree'] = TRUE;
+    $form['OPT'] = [
+        '#type' => 'fieldset',
+        '#title' => $this->t('Extra Fields Included into CSV File')
+    ];
+    $fields = array("uid","username","password");
+    $form['OPT']['fields'] = [
+        '#type' => 'checkboxes',
+        '#title' => $this->t('fields'),
+        '#options' => $fields
+    ];
+      //end includes uid, username and password?
     $form['actions']['#type'] = 'actions';
     $form['actions']['submit'] = array(
       '#type' => 'submit',
@@ -105,7 +118,8 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     $config = [
       'roles' => array_filter($roles, function($item) {
         return ($item);
-      })
+      }),
+      'opt' => $form_state->getValue(['OPT', 'fields'])
     ];
     if ($created = UserImportController::processUpload($file, $config)) {
       drupal_set_message(t('Successfully imported @count users.', ['@count' => count($created)]));