Course Work for OP, 2nd semester of year 1 at KPI

Analogue of a student diary with scheduler and system of data pick

A function calls reading of .json is added to the scheduler. For this work .json file must be formatted the following way:

“date”: {”time”: {“contacts”: “data”}}

The function will be called several times after same interval.

The data inside the file will be transformed into an object, a part of which information will be selected by certain attributes (must be formatted right in this case) and transferred from the original object to a new data structure. The newly picked data will form a new file of .json format.

Scheduler is a class with following public fields:

this.task;
this.args;
this._active;
this._intervalId;

And its private fields:

this._active;
this._intervalId;

It also has possible error collection and following methods:

№1

addTask(func, params)

Adds a task with its arguments if none currently exists. Uses help method

_canAdd(func, params)

№2

runTask(interval, counter)

Runs added task within given interval certain amount of times. Uses help methods:

_canRun(interval, counter)

To check if no task is currently running or if there is one to run. And also:

_clearTask(intervalId) 

For clearing interval when the task execution has to stop.

№3

delTask() 

If there is a task, deletes it. Current task stops running. Uses help method:

_canDel()

№4

_err(msg)

If any error occurs, this method will be called.

Object sort system has three main functions:

№1

formNewObject(struct, fns)

Accepts object and array as its arguments, array consists of other arrays that must look like this:

[[fnForKey, fnForValue, argsFnForKey, argsFnForValue], positionInObject]

Function returns newly selected object.

№2

selectByFns(origin, fn, pos)

Accordingly to given position, deepens into object 'original' or calls next main function:

№3

isAdded(obj, key, fnKey, fnVal, argsKey, argsVal)

Defines whether the data will be added to the new object.

In current work file 'testFile.json' is accepted to later be sorted accordingly to the functions in 'fns.js'. Newly received object is written intov directoty 'newFiles'. This work has 2 copies of the same object under differently numbered names in this directory.

There are tests for class Scheduler and object sort system.