javascript - 从后台接收到的一组数据，如何在前端整合成一个关系型的json对象？

问题描述

问 题

我从后台接受到一组数据，格式大致如下：

[
    {
        "name":"101",//房间号，表示1楼1号房
        "floor":"1-1",//楼层号，表示1单元1楼
        "unit":"1",//单元号，表示1单元
        "buildId":"1#"//楼栋id,表示1号楼
    },
    {
        "name":"102",
        "floor":"1-1",
        "unit":"1",
        "buildId":"1#"
    },
    {
        "name":"201", 
        "floor":"1-2",
        "unit":"1",
        "buildId":"1#"
    },
    {
        "name":"202", //房间号，表示2楼2号房
        "floor":"1-2",//楼层号，表示1单元2楼
        "unit":"1",
        "buildId":"1#"
    },
    {
        "name":"101",//房间号，表示1楼1号房
        "floor":"2-1",//楼层号，表示2单元1楼
        "unit":"2",//单元号，表示2单元
        "buildId":"1#"
    },
    {
        "name":"101",//房间号，表示2楼1号房
        "floor":"2-2",//楼层号，表示2单元2楼
        "unit":"2",//单元号，表示2单元
        "buildId":"1#"
    },"..."
]

这组数据中，对应关系就是floor、unit、buildId，大致意思就是，一栋楼包含几个单元，每个单元包含几个楼层，每层楼包含几户

{
    "buildId":"1#",//1号楼
    "unit":[
        {
            "id":"1",//1单元
            "floor":[
                {
                    "id":"1-1",//1单元1楼
                    "room":[
                        {
                            "name":"101",//房间号，表示所属1楼1号房
                            "floor":"1-1",//楼层号，表示所属1单元1楼
                            "unit":"1",//单元号，表示所属1单元
                            "buildId":"1#"//楼栋id,表示所属1号楼
                        },
                        {
                            "name":"102",
                            "floor":"1-1",
                            "unit":"1",
                            "buildId":"1#"
                        },
                    ]
                },
                {
                    "id":"1-2",//1单元2楼
                    "room":[
                        "..."
                    ]
                }
            ]
        },
        {
            "id":"2",//2单元
            "floor":[
                "..."
            ]
        }
    ]
}

最终重构成这样的关系型结构，整合成一个单独的json对象，前端用js应该如何写来处理呢？

解决方案

这边的代码使用TypeScript写的，这里给出的是编译出来之后的javascript，原代码见gist

let data = [
    {
        "name": "101",
        "floor": "1-1",
        "unit": "1",
        "buildId": "1#" //楼栋id,表示1号楼
    },
    {
        "name": "102",
        "floor": "1-1",
        "unit": "1",
        "buildId": "1#"
    },
    {
        "name": "201",
        "floor": "1-2",
        "unit": "1",
        "buildId": "1#"
    },
    {
        "name": "202",
        "floor": "1-2",
        "unit": "1",
        "buildId": "1#"
    },
    {
        "name": "101",
        "floor": "2-1",
        "unit": "2",
        "buildId": "1#"
    },
    {
        "name": "101",
        "floor": "2-2",
        "unit": "2",
        "buildId": "1#"
    }];
let result = data.reduce((result, room) => {
    let unit = result.unit.find(unit => unit.id == room.unit);
    if (unit) {
        let floor = unit.floor.find(floor => floor.id == room.floor);
        if (floor) {
            floor.room.push(room);
        }
        else {
            let roomList = [];
            roomList.push(room);
            let floor = { id: room.floor, room: roomList };
            unit.floor.push(floor);
        }
    }
    else {
        let roomList = [];
        roomList.push(room);
        let floorList = [];
        floorList.push({ id: room.floor, room: roomList });
        let unit = { id: room.unit, floor: floorList };
        result.unit.push(unit);
    }
    return result;
}, { buildId: '1#', unit: [] });

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