adding YearEq and MonthEq operators for time checks

README.md

@@ -51,6 +51,8 @@ go get github.com/goglue/rulesengine
 | DateBetween | Date / Time             | Checks is a time is between a given range.                                           |
 | WithinLast  | Date / Time             | Checks is a time is within the last X of a given duration.                           |
 | WithinNext  | Date / Time             | Checks is a time is within the next X a given duration.                              |
+| YearEq      | Date / Time             | Checks is a time is in a given year.                                                 |
+| MonthEq     | Date / Time             | Checks is a time is in a given month.                                                |
 | Any         | Array                   | Returns `true` if any element statisfy the given rule.                               |
 | All         | Array                   | Returns `true` if all elements satisfy the given rule.                               |
 | None        | Array                   | Returns `true` if no elements satisfy the given rule.                                |

helper.go

@@ -282,6 +282,26 @@ func isWithinTime(val any, duration any, op Operator) (bool, error) {
 	return false, nil
 }
 
+func compareTimePart(actual any, expected any, op Operator) (bool, error) {
+	t, ok := actual.(time.Time)
+	if !ok {
+		return false, newError(errType, actual)
+	}
+	value, err := toFloat(expected)
+	if err != nil {
+		return false, err
+	}
+	target := int(value)
+
+	switch op {
+	case YearEq:
+		return t.Year() == target, nil
+	case MonthEq:
+		return int(t.Month()) == target, nil
+	}
+	return false, nil
+}
+
 func resolveExpectedTime(expected any, now time.Time) (time.Time, error) {
 	switch v := expected.(type) {
 	case time.Time:

operators.go

@@ -46,6 +46,8 @@ const (
 	DateBetween Operator = "DATE_BETWEEN"
 	WithinLast  Operator = "WITHIN_LAST"
 	WithinNext  Operator = "WITHIN_NEXT"
+	YearEq      Operator = "YEAR_EQ"
+	MonthEq     Operator = "MONTH_EQ"
 
 	// Arrays
 	Any  Operator = "ANY"

rulesengine.go

@@ -255,6 +255,12 @@ func evaluateRule(operator Operator, actual, expected any) (bool, error) {
 		}
 		return true, nil
 
+	case YearEq, MonthEq:
+		if res, err := compareTimePart(actual, expected, operator); !res || err != nil {
+			return res, err
+		}
+		return true, nil
+
 	// ---------- Null / Existence ----------
 	case IsNull, NotExists:
 		if actual != nil {

rulesengine_test.go

@@ -347,6 +347,27 @@ var (
 			inputData: map[string]any{"startDate": relativeTime},
 			expResult: RuleResult{Result: true},
 		},
+		{
+			ruleNodes: Rule{
+				Operator: YearEq, Field: "startDate", Value: relativeNow.Year(),
+			},
+			inputData: map[string]any{"startDate": relativeTime},
+			expResult: RuleResult{Result: true},
+		},
+		{
+			ruleNodes: Rule{
+				Operator: YearEq, Field: "startDate", Value: 2020,
+			},
+			inputData: map[string]any{"startDate": relativeTime},
+			expResult: RuleResult{Result: false},
+		},
+		{
+			ruleNodes: Rule{
+				Operator: MonthEq, Field: "startDate", Value: int(time.June),
+			},
+			inputData: map[string]any{"startDate": relativeTime},
+			expResult: RuleResult{Result: true},
+		},
 		{
 			ruleNodes: Rule{
 				Operator: WithinLast, Field: "startDate", Value: last10Sec,