fix: add operator $size

Author: andrea-zucca

packages/flowerbase/src/utils/__tests__/operators.test.ts

@@ -86,6 +86,12 @@ describe('operators', () => {
     expect(operators.$all({ name: 'ciao' }, [{ name: 'ciao' }, 4, 5])).toBe(false)
     expect(operators.$all([{ name: 'ciao' }, 4, 5], [{ name: 'ciao' }, 4, 5])).toBe(false)
   })
+  it('should check array size', () => {
+    expect(operators.$size([1, 2, 3], 3)).toBe(true)
+    expect(operators.$size([1, 2, 3], 2)).toBe(false)
+    expect(operators.$size([], 0)).toBe(true)
+    expect(operators.$size('not-array', 0)).toBe(false)
+  })
   it('should check regex', () => {
     const emailRegex = /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/
     expect(operators.$regex('test@gmail.com', emailRegex)).toBe(true)

packages/flowerbase/src/utils/rules-matcher/interface.ts

@@ -311,6 +311,15 @@ export type Operators = {
    * @returns
    */
   $all: OperatorsFunction
+  /**
+   * @param a
+   * @param b
+   *
+   * Checks whether the length of the user input array is equal to the rule value.
+   *
+   * @returns
+   */
+  $size: OperatorsFunction
   /**
    * @param a
    * @param b
@@ -339,6 +348,7 @@ export enum RulesOperators {
   $in = '$in',
   $nin = '$nin',
   $all = '$all',
+  $size = '$size',
   $regex = '$regex'
 }
 

packages/flowerbase/src/utils/rules-matcher/utils.ts

@@ -277,6 +277,8 @@ export const operators: Operators = {
             .length
       ),
 
+  $size: (a, b) => Array.isArray(a) && a.length === parseFloat(b),
+
   $regex: (a, b, opt) =>
     rulesMatcherUtils
       .forceArray(b)