Detailed explanation of the delivery management function in the food ordering system developed with Go language

Detailed explanation of the delivery management function in the Go language development ordering system

With the development of the Internet and the popularity of smart terminals, the takeout industry has risen rapidly. As an important function of the takeout ordering system, delivery management plays a key role in ensuring the efficient operation of the takeout business. This article will introduce in detail how to use Go language to develop the delivery management function in the ordering system, and give specific code examples.

1. System requirements analysis:
   Before developing the distribution management function, we first need to analyze the system requirements. It mainly includes the following aspects:

(1) Order delivery: The system can assign the order to the nearest delivery person for delivery based on the address information of the user's order.

(2) Real-time tracking: The delivery person can update the delivery progress in real time and display the location to the user in real time to provide a better user experience.

(3) Intelligent dispatch: The system can automatically optimize delivery routes and improve delivery efficiency.

2. Database design:
   In order to support the distribution management function, we need to design the corresponding database structure. It mainly includes order form, delivery person form and delivery record form.

The order table includes fields such as order number, user ID, shipping address, order status, etc. The delivery person table includes delivery person ID, name, phone number and other fields. The delivery record table includes fields such as order number, delivery person ID, delivery time, delivery progress, etc.

3. Implementing the order delivery function:
   In the Go language, we can use the Gin framework to implement the development of the back-end interface. First, we need to define an interface for POST requests, receiving order number and user address information as parameters. Then, calculate the nearest delivery person based on the address information through a geographical location interface (such as Amap API). Finally, insert the order number and deliveryman ID into the delivery record table, and set the order status to "Delivered".

func Delivery(c *gin.Context) {
    // 获取订单号和用户地址
    orderID := c.PostForm("orderID")
    userAddress := c.PostForm("userAddress")

    // 根据用户地址通过地理位置接口计算最近的配送员

    // 将订单号和配送员ID插入到配送记录表中
    // 更新订单状态为“已派送”

    // 返回操作结果
    c.JSON(http.StatusOK, gin.H{"message": "订单派送成功"})
}

4. Real-time tracking function:
   In order to achieve real-time interaction between delivery personnel and users, we can use WebSocket technology to achieve this. The delivery person's location information is pushed to the user through WebSocket and displayed on the user interface in real time.

First, define a WebSocket interface in the back-end code and receive the delivery person's location information as a parameter. Then, the location information is pushed to the user via WebSocket.

func Track(c *gin.Context) {
    // 获取配送员ID和位置信息
    deliveryID := c.Param("deliveryID")
    location := c.PostForm("location")

    // 将位置信息通过WebSocket推送给用户

    // 返回操作结果
    c.JSON(http.StatusOK, gin.H{"message": "位置更新成功"})
}

5. Implementing intelligent scheduling function:
   In order to improve delivery efficiency, we can use path optimization algorithms (such as Dijkstra algorithm) to implement intelligent scheduling function. This algorithm can be used to find the optimal delivery route and reduce the driving distance of delivery personnel.

First, based on the order table and delivery person table, we need to build a map structure. Each node on the map represents a delivery point (such as a user's address), and the edges between nodes represent the driving distance.

Then, we can use Dijkstra's algorithm to calculate the shortest path and show the optimal delivery route to the delivery person.

// 实现Dijkstra算法
func Dijkstra(graph map[int][]Edge, start int, end int) []int {
    // 初始化距离数组、标记数组和前驱节点数组

    // 计算最短路径

    // 返回最短路径数组
    return path
}

To sum up, by developing the distribution management function in the ordering system through Go language, order delivery, real-time tracking and intelligent scheduling can be realized. The above is just a brief description of the functions, and the specific implementation methods need to be adjusted and improved according to specific business needs. I hope this article can provide some ideas and help for students developing ordering systems.

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