easy crud frontend

https://github.com/Dvirus97/easy-crud-frontend

This package help create fast basic curd api.

use clientService

extend IBaseModel in your types for this package

// clientService is a singleton service
const service = clientService;
// set the url of the server
service.setBaseUrl("http://localhost:3010");

// you can also write it like this:
const service = clientServices.setBaseUrl("http://localhost:3010");

// register entity type to the service.
service.register("person")
// you can pass options
service.register("person", {
    updateDataOnChange: true;
    pollingInterval: 2000;
    pollingRetries: 2,
    override: true
});

// you can also register many types at ones.
// if you pass options, the types will share the same options
service.register(['person', 'car', 'table']);

// listen to changes of this type from the server
// this method emit value only if there are changes in the data base on `version` property
service.select$("person").subscribe(...)

you can use polling to keep the data up to date

// start polling only for a specified type
service.polling.start("person");
// start polling for all registered types
service.polling.start();

// same for stop
service.polling.stop();

use crud operations

const p1 = { id: "1", type: "person", name: "name1" };
service.createEntity(p1);

p1.name = "name2";
service.updateEntity(p1);

service.deleteEntity(p1);

there are more operations

const p1 = { id: "1", type: "person", name: "name" };

// all of there methods are one time stream. they are complete after one emit
getOne(p1).subscribe();
getAll("person").subscribe();
addOne(p1).subscribe();
updateOne(p1).subscribe();
updateMany("person", [p1, p2]).subscribe();
deleteOne(p1).subscribe();
deleteAll("person").subscribe();

but there it also custom action

service.customAction("person", "hello", "POST", { data: "world" }).subscribe();

Other things in this package

HttpClient

use axios and rxjs to create observable based http request.

const http = new HttpClient();
http.get("path").subscribe((res) => console.log(res));
http.post("path", data).subscribe((res) => console.log(res));
http.put("path", data).subscribe((res) => console.log(res));
http.patch("path", data).subscribe((res) => console.log(res));
http.delete("path").subscribe((res) => console.log(res));

Compare

compareItems()

pass 2 objects and check if the are the same. if there is a version property, it compare by version

a.version == b.version

if there is no version property, it compare by json

JSON.stringify(a) == JSON.stringify(b)

isDataChanged()

pass 2 arrays and check if they are equal. it use compareItems() function to compare

smartPolling()

call a function in an interval. if more than one subscribers are listening, they will get the same data.

function foo() {
  const name = "value";
  return of(name); // of() in rxjs convert any value to observable
}

const polling = smartPolling(foo, 1000);
const subscription = polling.subscribe((x) => console.log(x));

setTimeout(() => subscription.unsubscribe(), 4000);

/*
logs:
value // after one sec (1)
value // after one sec (2)
value // after one sec (3)
value // after one sec (4)
//  stop polling
 */