How to use Go language to write the delivery person evaluation module in the door-to-door cooking system?

How to use Go language to write the delivery person evaluation module in the door-to-door cooking system?

With the rise of the takeout industry, the demand for door-to-door cooking systems is also increasing. In these systems, delivery personnel play a crucial role. In order to provide a better user experience, we need to provide a module for delivery driver evaluation. This article will introduce how to use Go language to write the delivery person evaluation module in the door-to-door cooking system, and provide some specific code examples.

1. Create evaluation data structure

First, we need to create an evaluation data structure to store information related to the deliveryman's evaluation. In Go language, we can use struct to implement:

type Evaluation struct {
    ID        int     // 评价ID
    OrderID   int     // 订单ID
    DeliveryID int    // 配送员ID
    Rating    int     // 评分
    Comment   string  // 评论
    Timestamp time.Time // 时间戳
}

In this data structure, we define the evaluation ID, order ID, deliveryman ID, rating, comment and timestamp.

2. Implementing evaluation memory

Next, we need to implement an evaluation memory to store and obtain the data of the delivery person's evaluation. In Go language, we can use slices to implement a simple evaluation memory.

var evaluations []Evaluation

func AddEvaluation(evaluation Evaluation) {
    evaluations = append(evaluations, evaluation)
}

func GetEvaluationsByDeliveryID(deliveryID int) []Evaluation {
    var result []Evaluation
    for _, evaluation := range evaluations {
        if evaluation.DeliveryID == deliveryID {
            result = append(result, evaluation)
        }
    }
    return result
}

func GetAverageRatingByDeliveryID(deliveryID int) float64 {
    var totalRating int
    var count int
    for _, evaluation := range evaluations {
        if evaluation.DeliveryID == deliveryID {
            totalRating += evaluation.Rating
            count++
        }
    }
    if count == 0 {
        return 0.0
    }
    return float64(totalRating) / float64(count)
}

In this example, evaluations is a global slice used to store evaluation data. The AddEvaluation function is used to add evaluations to the memory, the GetEvaluationsByDeliveryID function is used to obtain the evaluation list based on the delivery person ID, the GetAverageRatingByDeliveryID function is used to calculate the average rating of the delivery person .

3. Add evaluation function

Next, we need to add evaluation function to the door-to-door cooking system. In this example, we assume there is a function ProcessOrder that processes an order. After the order is processed, the user has an option to rate the delivery person.

func ProcessOrder(orderID int, deliveryID int) {
    // 订单处理逻辑...

    // 评价配送员
    rating := 5
    comment := "配送员服务很好！"
    evaluation := Evaluation{
        ID:        len(evaluations) + 1,
        OrderID:   orderID,
        DeliveryID: deliveryID,
        Rating:    rating,
        Comment:   comment,
        Timestamp: time.Now(),
    }
    AddEvaluation(evaluation)
}

In this example, when the order is processed, we create a review object with a rating and review and add it to the review store.

4. Using evaluation information

In the previous steps, we have implemented the function of storing and obtaining delivery staff evaluations. Now, we can use this review information to display the ratings and reviews of delivery people.

func GetDeliveryRating(deliveryID int) {
    evaluations := GetEvaluationsByDeliveryID(deliveryID)
    averageRating := GetAverageRatingByDeliveryID(deliveryID)
    
    // 利用评价信息进行业务处理...
}

In this example, we first obtain all the evaluation information through the deliveryman ID, and then calculate the average rating through the deliveryman ID. We can then use this evaluation information for other business processing.

Summary:

In this article, we learned how to use Go language to write the deliveryman evaluation module in the door-to-door cooking system. We created a data structure for reviews and implemented a review memory to store and retrieve review information. We also showed how to add reviews after the order is processed and use the review information for other business processes. Through this module, we can better manage and utilize the evaluation information of delivery personnel. Hope this example helps you!

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