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import { Observable } from '../Observable';
import { ObservableInput, SchedulerLike, ObservedValueOf } from '../types';
import { isScheduler } from '../util/isScheduler';
import { of } from './of';
import { from } from './from';
import { concatAll } from '../operators/concatAll';
/* tslint:disable:max-line-length */
export function concat<O1 extends ObservableInput<any>>(v1: O1, scheduler?: SchedulerLike): Observable<ObservedValueOf<O1>>;
export function concat<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>>(v1: O1, v2: O2, scheduler?: SchedulerLike): Observable<ObservedValueOf<O1> | ObservedValueOf<O2>>;
export function concat<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, O3 extends ObservableInput<any>>(v1: O1, v2: O2, v3: O3, scheduler?: SchedulerLike): Observable<ObservedValueOf<O1> | ObservedValueOf<O2> | ObservedValueOf<O3>>;
export function concat<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, O3 extends ObservableInput<any>, O4 extends ObservableInput<any>>(v1: O1, v2: O2, v3: O3, v4: O4, scheduler?: SchedulerLike): Observable<ObservedValueOf<O1> | ObservedValueOf<O2> | ObservedValueOf<O3> | ObservedValueOf<O4>>;
export function concat<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, O3 extends ObservableInput<any>, O4 extends ObservableInput<any>, O5 extends ObservableInput<any>>(v1: O1, v2: O2, v3: O3, v4: O4, v5: O5, scheduler?: SchedulerLike): Observable<ObservedValueOf<O1> | ObservedValueOf<O2> | ObservedValueOf<O3> | ObservedValueOf<O4> | ObservedValueOf<O5>>;
export function concat<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, O3 extends ObservableInput<any>, O4 extends ObservableInput<any>, O5 extends ObservableInput<any>, O6 extends ObservableInput<any>>(v1: O1, v2: O2, v3: O3, v4: O4, v5: O5, v6: O6, scheduler?: SchedulerLike): Observable<ObservedValueOf<O1> | ObservedValueOf<O2> | ObservedValueOf<O3> | ObservedValueOf<O4> | ObservedValueOf<O5> | ObservedValueOf<O6>>;
export function concat<O extends ObservableInput<any>>(...observables: (O | SchedulerLike)[]): Observable<ObservedValueOf<O>>;
export function concat<R>(...observables: (ObservableInput<any> | SchedulerLike)[]): Observable<R>;
/* tslint:enable:max-line-length */
/**
* Creates an output Observable which sequentially emits all values from given
* Observable and then moves on to the next.
*
* <span class="informal">Concatenates multiple Observables together by
* sequentially emitting their values, one Observable after the other.</span>
*
* 
*
* `concat` joins multiple Observables together, by subscribing to them one at a time and
* merging their results into the output Observable. You can pass either an array of
* Observables, or put them directly as arguments. Passing an empty array will result
* in Observable that completes immediately.
*
* `concat` will subscribe to first input Observable and emit all its values, without
* changing or affecting them in any way. When that Observable completes, it will
* subscribe to then next Observable passed and, again, emit its values. This will be
* repeated, until the operator runs out of Observables. When last input Observable completes,
* `concat` will complete as well. At any given moment only one Observable passed to operator
* emits values. If you would like to emit values from passed Observables concurrently, check out
* {@link merge} instead, especially with optional `concurrent` parameter. As a matter of fact,
* `concat` is an equivalent of `merge` operator with `concurrent` parameter set to `1`.
*
* Note that if some input Observable never completes, `concat` will also never complete
* and Observables following the one that did not complete will never be subscribed. On the other
* hand, if some Observable simply completes immediately after it is subscribed, it will be
* invisible for `concat`, which will just move on to the next Observable.
*
* If any Observable in chain errors, instead of passing control to the next Observable,
* `concat` will error immediately as well. Observables that would be subscribed after
* the one that emitted error, never will.
*
* If you pass to `concat` the same Observable many times, its stream of values
* will be "replayed" on every subscription, which means you can repeat given Observable
* as many times as you like. If passing the same Observable to `concat` 1000 times becomes tedious,
* you can always use {@link repeat}.
*
* ## Examples
* ### Concatenate a timer counting from 0 to 3 with a synchronous sequence from 1 to 10
* ```javascript
* import { concat, interval, range } from 'rxjs';
* import { take } from 'rxjs/operators';
*
* const timer = interval(1000).pipe(take(4));
* const sequence = range(1, 10);
* const result = concat(timer, sequence);
* result.subscribe(x => console.log(x));
*
* // results in:
* // 0 -1000ms-> 1 -1000ms-> 2 -1000ms-> 3 -immediate-> 1 ... 10
* ```
*
* ### Concatenate an array of 3 Observables
* ```javascript
* import { concat, interval } from 'rxjs';
* import { take } from 'rxjs/operators';
*
* const timer1 = interval(1000).pipe(take(10));
* const timer2 = interval(2000).pipe(take(6));
* const timer3 = interval(500).pipe(take(10));
* const result = concat([timer1, timer2, timer3]); // note that array is passed
* result.subscribe(x => console.log(x));
*
* // results in the following:
* // (Prints to console sequentially)
* // -1000ms-> 0 -1000ms-> 1 -1000ms-> ... 9
* // -2000ms-> 0 -2000ms-> 1 -2000ms-> ... 5
* // -500ms-> 0 -500ms-> 1 -500ms-> ... 9
* ```
*
* ### Concatenate the same Observable to repeat it
* ```javascript
* import { concat, interval } from 'rxjs';
* import { take } from 'rxjs/operators';
*
* const timer = interval(1000).pipe(take(2));
* *
* concat(timer, timer) // concatenating the same Observable!
* .subscribe(
* value => console.log(value),
* err => {},
* () => console.log('...and it is done!')
* );
*
* // Logs:
* // 0 after 1s
* // 1 after 2s
* // 0 after 3s
* // 1 after 4s
* // "...and it is done!" also after 4s
* ```
*
* @see {@link concatAll}
* @see {@link concatMap}
* @see {@link concatMapTo}
*
* @param {ObservableInput} input1 An input Observable to concatenate with others.
* @param {ObservableInput} input2 An input Observable to concatenate with others.
* More than one input Observables may be given as argument.
* @param {SchedulerLike} [scheduler=null] An optional {@link SchedulerLike} to schedule each
* Observable subscription on.
* @return {Observable} All values of each passed Observable merged into a
* single Observable, in order, in serial fashion.
* @static true
* @name concat
* @owner Observable
*/
export function concat<O extends ObservableInput<any>, R>(...observables: Array<O | SchedulerLike>): Observable<ObservedValueOf<O> | R> {
return concatAll<R>()(of(...observables));
}
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