Table columns validate method to be used for edit and add model methods validation

Author: givanz

system/db/dbdriver.php

@@ -116,6 +116,87 @@ public function filter($data, $columns, $addMissingDefaults = false) {
 		}
 	}
 
+	public function validate($data, $params, $table = '', $ignoreMissing = false) {
+		$errors = [];
+
+		foreach ($params as $name => $type) {
+			if (! isset($data[$name])) {
+				if (! $ignoreMissing) {
+				$errors[] = sprintf('%s missing!', $name);
+				}
+
+				continue;
+			}
+
+			if (is_array($type)) {
+				if (isset($data[$name]) && is_array($data[$name])) {
+					//check if collection
+					if (is_numeric(key($data[$name]))) {
+						$arr = $data[$name][0] ?? [];
+					} else {
+						$arr = $data[$name];
+					}
+
+					foreach ($type as $col => $attr) {
+						//skip auto increment
+						if ((isset($attr['e']) && $attr['e'] == 'auto_increment')
+							|| ($table && $col == $table . '_id')) {
+							continue;
+						}
+
+						if (! isset($arr[$col])) {
+							//skip columns that have default values
+							if (($attr['d'] === 'NULL' || $attr['d'] === NULL) && ! $ignoreMissing) {
+								$errors[] = sprintf('%s missing!', $name . '[' . $col . ']');
+							}
+						} else {
+							if (($attr['t'] == 'int' || $attr['t'] == 'decimal' || $attr['t'] == 'tinyint') && ! is_numeric($arr[$col])) {
+								$errors[] = sprintf('%s is not an integer!', $name . '[' . $col . ']');
+							}
+
+							if (isset($attr['l']) && $attr['l'] && (strlen($arr[$col]) > $attr['l'])) {
+								$errors[] = sprintf('%s is longer than %s!', $name . '[' . $col . ']', $attr['l']);
+							}
+						}
+					}
+				} else {
+					$errors[] = sprintf('%s is not an array!', $name);
+				}
+			} else {
+				switch ($type) {
+					case 'a':
+						if (! isset($data[$name]) || ! is_array($data[$name])) {
+							$errors[] = sprintf('%s is not an array!', $name);
+						} else {
+							if (substr_compare($name, '_id', -3 ,3) === 0 &&
+								! empty($data[$name]) &&
+								! is_numeric($data[$name][0])) {
+								$errors[] = sprintf('%s is not an integer!', $name . '[0]');
+							}
+						}
+
+						break;
+
+					case 'i':
+						if (! isset($data[$name]) || ! is_numeric($data[$name])) {
+							$errors[] = sprintf('%s is not an integer!', $name);
+						}
+
+						break;
+
+					case 's':
+						if (! isset($data[$name]) || ! is_string($data[$name])) {
+							$errors[] = sprintf('%s is not a string!', $name);
+						}
+
+						break;
+				}
+			}
+		}
+
+		return $errors;
+	}
+
 	/*
 	* Expands arrays a = ['param' => 'value', 'second' => value]; to a[param], a[second]
 	*/