URL to code in node.js applications - node.js

Question

I see they use this kind of code to call restful URLs.
Let's say we have /users/{userId}/tasks to create task for a user.
To call this they create another class instead of calling request directly as shown below:
MyAPP.prototype.users = function (userId) {
return {
tasks: function (taskId) {
return this.usersTasks(userId, taskId);
}
}
}
MyAPP.prototype.usersTasks = function (userId, taskId) {
return {
create: function (task, cb) {
make request POST call
}
}
}
Then we can call this as myapp.users('123').tasks().create(task, cb);
What is this kind of coding called and is there any way to automatically generate the code from the URL structure itself?

Answer 1

That is a way of making classes, but I suggest you look into ES6 classes
Defining a class :
class MyAPP {
//:called when created
constructor(name) {
this.name = name;
console.log("[created] MyAPP :",name);
//(a in memory database stored in MyAPP : for example purpose)
this.DB = {'user000':{'tasks':{'task000':'do pizza'},{'task001':'code some magik'}}}
}
//: Get specific taskID for userID
getTask(userID, taskID) {
console.log("[get task]",taskID,"[from user]",userID)
return (this.DB[userID][taskID])
}
//: Get all tasks for userID
allTasks(userID) {
console.log("[get all tasks from user]",userID)
return (this.DB[userID].tasks)
}
//: Create a taskID with taskContent for userID
newTask(userID, taskID, taskContent) {
this.DB[userID].tasks[taskID] = taskContent
}
}
Creating a MyAPP instance :
var myapp = new MyAPP('Pizza API'); //creates a MyAPP with a name
And then (maybe I got your question wrong) using express you would make a server and listen for requests (GET, POST, PUT, ...)
app.get("/APIv1/:userID/:actionID", function(req, res) {
switch(req.params.actionID){
case 'all':
res.send(myapp.allTasks(req.params.userID));
break
default :
res.send("The "+myapp.name+" doesn't support that (yet)")
break
}
});