go-valuator

With this package, you can evaluate simple expression

Supported Operator

• =
• !=
• in
• !in
• intersect
• >
• >=
• <
• <=

Dependencies

"github.com/bastianrob/arrayutil"

Example

Equality evaluation

eval, err := valuator.NewValuator("name", "=", "John Doe", "Name must be equal to John Doe")
result := eval.Evaluate(map[string]interface{}{
    "name": "John Doe"
})
fmt.Println("Err:",err, "Res:", result)
//Err: <nil> Res: true

In evaluation

eval, err := valuator.NewValuator("status", "in", `["Open", "Close"]`, "Status must be one of")
result1 := eval.Evaluate(map[string]interface{}{
    "status": "Void"
})
result2 := eval.Evaluate(map[string]interface{}{
    "status": "Open"
})
fmt.Println("Err:",err, "Res1:", result1, "Res2:", result2)
//Err: <nil> Res1: false Res2: true

Intersect evaluation

eval, err := valuator.NewValuator("number", "intersect", `[1, 2, 3, 4, 5]`, "number intersects")
result1 := eval.Evaluate(map[string]interface{}{
    "number": []int{6, 7},
})
result2 := eval.Evaluate(map[string]interface{}{
    "number": []int{1, 3, 7},
})
fmt.Println("Err:",err, "Res1:", result1, "Res2:", result2)
//Err: <nil> Res1: false Res2: true

> evaluation

eval, err := valuator.NewValuator("number", ">", "100", "Number must be more than 100")
result1 := eval.Evaluate(map[string]interface{}{
    "number": 100
})
result2 := eval.Evaluate(map[string]interface{}{
    "number": "100.1" //accept either string, int, or float
})
fmt.Println("Err:",err, "Res1:", result1, "Res2:", result2)
//Err: <nil> Res1: false Res2: true

>= evaluation

eval, err := valuator.NewValuator("number", ">=", "100", "Number must be more than 100")
result1 := eval.Evaluate(map[string]interface{}{
    "number": 99.9
})
result2 := eval.Evaluate(map[string]interface{}{
    "number": "100" //accept either string, int, or float
})
fmt.Println("Err:",err, "Res1:", result1, "Res2:", result2)
//Err: <nil> Res1: false Res2: true

< evaluation

eval, err := valuator.NewValuator("number", "<", "100", "Number must be less than 100")
result1 := eval.Evaluate(map[string]interface{}{
    "number": 100
})
result2 := eval.Evaluate(map[string]interface{}{
    "number": "100.1" //accept either string, int, or float
})
fmt.Println("Err:",err, "Res1:", result1, "Res2:", result2)
//Err: <nil> Res1: false Res2: true

<= evaluation

eval, err := valuator.NewValuator("number", "<=", "100", "Number must be less than 100")
result1 := eval.Evaluate(map[string]interface{}{
    "number": 100.1
})
result2 := eval.Evaluate(map[string]interface{}{
    "number": "100" //accept either string, int, or float
})
fmt.Println("Err:",err, "Res1:", result1, "Res2:", result2)
//Err: <nil> Res1: false Res2: true