#3 Allow to extend DbFilter class

- Fix static construction
- Fix return Types

Author: enduro44

src/filters/DbFilter.php

@@ -37,66 +37,66 @@ private function __construct(string $column, $value, string $type)
      * DbFilter constructor.
      * @param string $column
      * @param string|int|array $value
-     * @return DbFilter
+     * @return Filter
      */
-    public static function constructLike(string $column, $value): self
+    public static function constructLike(string $column, $value): Filter
     {
-        return new self($column, $value, DbFilterType::Like);
+        return new static($column, $value, DbFilterType::Like);
     }
 
     /**
      * DbFilter constructor.
      * @param string $column
      * @param string|int|array $value
-     * @return DbFilter
+     * @return Filter
      */
-    public static function constructNotLike(string $column, $value): self
+    public static function constructNotLike(string $column, $value): Filter
     {
-        return new self($column, $value, DbFilterType::NotLike);
+        return new static($column, $value, DbFilterType::NotLike);
     }
 
     /**
      * DbFilter constructor.
      * @param string $column
      * @param string|int|array $value
-     * @return DbFilter
+     * @return Filter
      */
-    public static function constructEquals(string $column, $value): self
+    public static function constructEquals(string $column, $value): Filter
     {
-        return new self($column, $value, DbFilterType::Equals);
+        return new static($column, $value, DbFilterType::Equals);
     }
 
     /**
      * DbFilter constructor.
      * @param string $column
      * @param string|int|array $value
-     * @return DbFilter
+     * @return Filter
      */
-    public static function constructNotEquals(string $column, $value): self
+    public static function constructNotEquals(string $column, $value): Filter
     {
-        return new self($column, $value, DbFilterType::NotEquals);
+        return new static($column, $value, DbFilterType::NotEquals);
     }
 
     /**
      * DbFilter constructor.
      * @param string $column
      * @param string|int|array $value
-     * @return DbFilter
+     * @return Filter
      */
-    public static function constructIn(string $column, $value): self
+    public static function constructIn(string $column, $value): Filter
     {
-        return new self($column, $value, DbFilterType::In);
+        return new static($column, $value, DbFilterType::In);
     }
 
     /**
      * DbFilter constructor.
      * @param string $column
      * @param string|int|array $value
-     * @return DbFilter
+     * @return Filter
      */
-    public static function constructNotIn(string $column, $value): self
+    public static function constructNotIn(string $column, $value): Filter
     {
-        return new self($column, $value, DbFilterType::NotEquals);
+        return new static($column, $value, DbFilterType::NotEquals);
     }
 
     public function sql(): string

src/filters/DbFilters.php

@@ -15,14 +15,14 @@ public function __construct(DbFiltersGroup $filtersGroup)
         $this->filtersGroup = $filtersGroup;
     }
 
-    public static function constructFromGroup(DbFiltersGroup $filtersGroup): self
+    public static function constructFromGroup(DbFiltersGroup $filtersGroup): Filter
     {
-        return new self($filtersGroup);
+        return new static($filtersGroup);
     }
 
-    public static function constructFromFilter(Filter $dbFilter): self
+    public static function constructFromFilter(Filter $dbFilter): Filter
     {
-        return new self(DbFiltersGroup::constructAndGroup([$dbFilter]));
+        return new static(DbFiltersGroup::constructAndGroup([$dbFilter]));
     }
 
     public function sql(): string

src/filters/DbFiltersGroup.php

@@ -29,20 +29,20 @@ private function __construct(array $filters, string $join)
 
     /**
      * @param Filter[]|DbFiltersGroup[] $filters
-     * @return DbFiltersGroup
+     * @return Filter
      */
-    public static function constructAndGroup(array $filters): self
+    public static function constructAndGroup(array $filters): Filter
     {
-        return new self($filters, 'AND');
+        return new static($filters, 'AND');
     }
 
     /**
      * @param Filter[]|DbFiltersGroup[] $filters
-     * @return DbFiltersGroup
+     * @return Filter
      */
-    public static function constructOrGroup(array $filters): self
+    public static function constructOrGroup(array $filters): Filter
     {
-        return new self($filters, 'OR');
+        return new static($filters, 'OR');
     }
 
     public function sql(): string

src/order/DbOrder.php

@@ -18,9 +18,9 @@ public function __construct(array $columnOrdering)
         $this->ordering = $columnOrdering;
     }
 
-    public static function fromSingleColumn(string $column, string $direction)
+    public static function fromSingleColumn(string $column, string $direction): Order
     {
-        return new self([$column => $direction]);
+        return new static([$column => $direction]);
     }
 
     public function orderingFormatted(): string