## thenObservablePipe or then$$$

```ts
function thenObservablePipe<GInNextValue, GOut>(
  onFulfilled: IThenObservableOnFulfilled<GInNextValue, GOut>,
  onRejected: IThenObservableOnRejected<GOut>,
): IObservablePipe<IThenObservableInNotifications<GInNextValue>, GOut>
```

With:

```ts
interface IThenObservableOnFulfilled<GInNextValue, GOut> {
  (value: GInNextValue): IObservable<GOut>;
}

interface IThenObservableOnRejected<GOut> {
  (error: any): IObservable<GOut>;
}

```

This function is similar to the method `.then` of a Promise. 

It subscribes to an *Observable* that emits some Notifications (`next`, `complete` and `error`).

If a `complete` Notification is received, it calls `onFulfilled` with the last received value coming from a `next` Notification.

If an `error` Notification is received, it calls `onRejected` with this error.

Then, it emits the values from the Observable returned by `onFulfilled` or `onRejected`.

This is useful to mimic the behaviour of Promises but with Observables.

It comes with three helpers:
- [fulfilledObservablePipe](./derived/fulfilled/fulfilled-observable-pipe.md)
- [rejectedObservablePipe](./derived/rejected/rejected-observable-pipe.md)
- [finallyObservablePipe](./derived/finally/finally-observable-pipe.md)


**WARNING:** do not throw into any of `onFulfilled` or `onRejected` and expects that it will send an `error` Notification.
Instead, use `throwError`.

### Diagrams

#### fulfilled

[![](https://mermaid.ink/img/eyJjb2RlIjoic2VxdWVuY2VEaWFncmFtXG5cbnBhcnRpY2lwYW50IG9ic2VydmFibGVcbnBhcnRpY2lwYW50IHRoZW5PYnNlcnZhYmxlUGlwZSBhcyB0aGVuT2JzZXJ2YWJsZVBpcGUob25GdWxmaWxsZWQsIG9uUmVqZWN0ZWQpXG5wYXJ0aWNpcGFudCBPVVRcblxub2JzZXJ2YWJsZS0-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)](https://mermaid-js.github.io/mermaid-live-editor/edit/#eyJjb2RlIjoic2VxdWVuY2VEaWFncmFtXG5cbnBhcnRpY2lwYW50IG9ic2VydmFibGVcbnBhcnRpY2lwYW50IHRoZW5PYnNlcnZhYmxlUGlwZSBhcyB0aGVuT2JzZXJ2YWJsZVBpcGUob25GdWxmaWxsZWQsIG9uUmVqZWN0ZWQpXG5wYXJ0aWNpcGFudCBPVVRcblxub2JzZXJ2YWJsZS0-PnRoZW5PYnNlcnZhYmxlUGlwZTogbmV4dDogdmFsdWVcbm9ic2VydmFibGUtPj50aGVuT2JzZXJ2YWJsZVBpcGU6IGNvbXBsZXRlXG5Ob3RlIG92ZXIgdGhlbk9ic2VydmFibGVQaXBlOiBvbkZ1bGZpbGxlZCh2YWx1ZSlcbnRoZW5PYnNlcnZhYmxlUGlwZS0tPj5PVVQ6IHZhbHVlcyBzZW5kIGJ5IHRoZSBvYnNlcnZhYmxlIHJldHVuZWQgYnkgb25GdWxmaWxsZWRcbiIsIm1lcm1haWQiOiJ7XG4gIFwidGhlbWVcIjogXCJkZWZhdWx0XCIsXG4gIFwidGhlbWVWYXJpYWJsZXNcIjoge1xuICAgIFwiYmFja2dyb3VuZFwiOiBcIndoaXRlXCIsXG4gICAgXCJwcmltYXJ5Q29sb3JcIjogXCIjRUNFQ0ZGXCIsXG4gICAgXCJzZWNvbmRhcnlDb2xvclwiOiBcIiNmZmZmZGVcIixcbiAgICBcInRlcnRpYXJ5Q29sb3JcIjogXCJoc2woODAsIDEwMCUsIDk2LjI3NDUwOTgwMzklKVwiLFxuICAgIFwicHJpbWFyeUJvcmRlckNvbG9yXCI6IFwiaHNsKDI0MCwgNjAlLCA4Ni4yNzQ1MDk4MDM5JSlcIixcbiAgICBcInNlY29uZGFyeUJvcmRlckNvbG9yXCI6IFwiaHNsKDYwLCA2MCUsIDgzLjUyOTQxMTc2NDclKVwiLFxuICAgIFwidGVydGlhcnlCb3JkZXJDb2xvclwiOiBcImhzbCg4MCwgNjAlLCA4Ni4yNzQ1MDk4MDM5JSlcIixcbiAgICBcInByaW1hcnlUZXh0Q29sb3JcIjogXCIjMTMxMzAwXCIsXG4gICAgXCJzZWNvbmRhcnlUZXh0Q29sb3JcIjogXCIjMDAwMDIxXCIsXG4gICAgXCJ0ZXJ0aWFyeVRleHRDb2xvclwiOiBcInJnYig5LjUwMDAwMDAwMDEsIDkuNTAwMDAwMDAwMSwgOS41MDAwMDAwMDAxKVwiLFxuICAgIFwibGluZUNvbG9yXCI6IFwiIzMzMzMzM1wiLFxuICAgIFwidGV4dENvbG9yXCI6IFwiIzMzM1wiLFxuICAgIFwibWFpbkJrZ1wiOiBcIiNFQ0VDMDBcIixcbiAgICBcInNlY29uZEJrZ1wiOiBcIiNmZmZmZGVcIixcbiAgICBcImJvcmRlcjFcIjogXCIjOTM3MERCXCIsXG4gICAgXCJib3JkZXIyXCI6IFwiI2FhYWEzM1wiLFxuICAgIFwiYXJyb3doZWFkQ29sb3JcIjogXCIjMzMzMzMzXCIsXG4gICAgXCJmb250RmFtaWx5XCI6IFwiXFxcInRyZWJ1Y2hldCBtc1xcXCIsIHZlcmRhbmEsIGFyaWFsXCIsXG4gICAgXCJmb250U2l6ZVwiOiBcIjE2cHhcIixcbiAgICBcImxhYmVsQmFja2dyb3VuZFwiOiBcIiNlOGU4ZThcIixcbiAgICBcIm5vZGVCa2dcIjogXCIjRUNFQ0ZGXCIsXG4gICAgXCJub2RlQm9yZGVyXCI6IFwiIzkzNzBEQlwiLFxuICAgIFwiY2x1c3RlckJrZ1wiOiBcIiNmZmZmZGVcIixcbiAgICBcImNsdXN0ZXJCb3JkZXJcIjogXCIjYWFhYTMzXCIsXG4gICAgXCJkZWZhdWx0TGlua0NvbG9yXCI6IFwiIzMzMzMzM1wiLFxuICAgIFwidGl0bGVDb2xvclwiOiBcIiMzMzNcIixcbiAgICBcImVkZ2VMYWJlbEJhY2tncm91bmRcIjogXCIjZThlOGU4XCIsXG4gICAgXCJhY3RvckJvcmRlclwiOiBcImhzbCgyNTkuNjI2MTY4MjI0MywgNTkuNzc2NTM2MzEyOCUsIDg3LjkwMTk2MDc4NDMlKVwiLFxuICAgIFwiYWN0b3JCa2dcIjogXCIjRUNFQ0ZGXCIsXG4gICAgXCJhY3RvclRleHRDb2xvclwiOiBcImJsYWNrXCIsXG4gICAgXCJhY3RvckxpbmVDb2xvclwiOiBcImdyZXlcIixcbiAgICBcInNpZ25hbENvbG9yXCI6IFwiIzMzM1wiLFxuICAgIFwic2lnbmFsVGV4dENvbG9yXCI6IFwiIzMzM1wiLFxuICAgIFwibGFiZWxCb3hCa2dDb2xvclwiOiBcIiNFQ0VDRkZcIixcbiAgICBcImxhYmVsQm94Qm9yZGVyQ29sb3JcIjogXCJoc2woMjU5LjYyNjE2ODIyNDMsIDU5Ljc3NjUzNjMxMjglLCA4Ny45MDE5NjA3ODQzJSlcIixcbiAgICBcImxhYmVsVGV4dENvbG9yXCI6IFwiYmxhY2tcIixcbiAgICBcImxvb3BUZXh0Q29sb3JcIjogXCJibGFja1wiLFxuICAgIFwibm90ZUJvcmRlckNvbG9yXCI6IFwiI2FhYWEzM1wiLFxuICAgIFwibm90ZUJrZ0NvbG9yXCI6IFwiI2ZmZjVhZFwiLFxuICAgIFwibm90ZVRleHRDb2xvclwiOiBcImJsYWNrXCIsXG4gICAgXCJhY3RpdmF0aW9uQm9yZGVyQ29sb3JcIjogXCIjNjY2XCIsXG4gICAgXCJhY3RpdmF0aW9uQmtnQ29sb3JcIjogXCIjZjRmNGY0XCIsXG4gICAgXCJzZXF1ZW5jZU51bWJlckNvbG9yXCI6IFwid2hpdGVcIixcbiAgICBcInNlY3Rpb25Ca2dDb2xvclwiOiBcInJnYmEoMTAyLCAxMDIsIDI1NSwgMC40OSlcIixcbiAgICBcImFsdFNlY3Rpb25Ca2dDb2xvclwiOiBcIndoaXRlXCIsXG4gICAgXCJzZWN0aW9uQmtnQ29sb3IyXCI6IFwiI2ZmZjQwMFwiLFxuICAgIFwidGFza0JvcmRlckNvbG9yXCI6IFwiIzUzNGZiY1wiLFxuICAgIFwidGFza0JrZ0NvbG9yXCI6IFwiIzhhOTBkZFwiLFxuICAgIFwidGFza1RleHRMaWdodENvbG9yXCI6IFwid2hpdGVcIixcbiAgICBcInRhc2tUZXh0Q29sb3JcIjogXCJ3aGl0ZVwiLFxuICAgIFwidGFza1RleHREYXJrQ29sb3JcIjogXCJibGFja1wiLFxuICAgIFwidGFza1RleHRPdXRzaWRlQ29sb3JcIjogXCJibGFja1wiLFxuICAgIFwidGFza1RleHRDbGlja2FibGVDb2xvclwiOiBcIiMwMDMxNjNcIixcbiAgICBcImFjdGl2ZVRhc2tCb3JkZXJDb2xvclwiOiBcIiM1MzRmYmNcIixcbiAgICBcImFjdGl2ZVRhc2tCa2dDb2xvclwiOiBcIiNiZmM3ZmZcIixcbiAgICBcImdyaWRDb2xvclwiOiBcImxpZ2h0Z3JleVwiLFxuICAgIFwiZG9uZVRhc2tCa2dDb2xvclwiOiBcImxpZ2h0Z3JleVwiLFxuICAgIFwiZG9uZVRhc2tCb3JkZXJDb2xvclwiOiBcImdyZXlcIixcbiAgICBcImNyaXRCb3JkZXJDb2xvclwiOiBcIiNmZjg4ODhcIixcbiAgICBcImNyaXRCa2dDb2xvclwiOiBcInJlZFwiLFxuICAgIFwidG9kYXlMaW5lQ29sb3JcIjogXCJyZWRcIixcbiAgICBcImxhYmVsQ29sb3JcIjogXCJibGFja1wiLFxuICAgIFwiZXJyb3JCa2dDb2xvclwiOiBcIiM1NTIyMjJcIixcbiAgICBcImVycm9yVGV4dENvbG9yXCI6IFwiIzU1MjIyMlwiLFxuICAgIFwiY2xhc3NUZXh0XCI6IFwiIzEzMTMwMFwiLFxuICAgIFwiZmlsbFR5cGUwXCI6IFwiI0VDRUNGRlwiLFxuICAgIFwiZmlsbFR5cGUxXCI6IFwiI2ZmZmZkZVwiLFxuICAgIFwiZmlsbFR5cGUyXCI6IFwiaHNsKDMwNCwgMTAwJSwgOTYuMjc0NTA5ODAzOSUpXCIsXG4gICAgXCJmaWxsVHlwZTNcIjogXCJoc2woMTI0LCAxMDAlLCA5My41Mjk0MTE3NjQ3JSlcIixcbiAgICBcImZpbGxUeXBlNFwiOiBcImhzbCgxNzYsIDEwMCUsIDk2LjI3NDUwOTgwMzklKVwiLFxuICAgIFwiZmlsbFR5cGU1XCI6IFwiaHNsKC00LCAxMDAlLCA5My41Mjk0MTE3NjQ3JSlcIixcbiAgICBcImZpbGxUeXBlNlwiOiBcImhzbCg4LCAxMDAlLCA5Ni4yNzQ1MDk4MDM5JSlcIixcbiAgICBcImZpbGxUeXBlN1wiOiBcImhzbCgxODgsIDEwMCUsIDkzLjUyOTQxMTc2NDclKVwiXG4gIH1cbn0iLCJ1cGRhdGVFZGl0b3IiOmZhbHNlLCJhdXRvU3luYyI6dHJ1ZSwidXBkYXRlRGlhZ3JhbSI6ZmFsc2V9)

#### rejected

[![](https://mermaid.ink/img/eyJjb2RlIjoic2VxdWVuY2VEaWFncmFtXG5cbnBhcnRpY2lwYW50IG9ic2VydmFibGVcbnBhcnRpY2lwYW50IHRoZW5PYnNlcnZhYmxlUGlwZSBhcyB0aGVuT2JzZXJ2YWJsZVBpcGUob25GdWxmaWxsZWQsIG9uUmVqZWN0ZWQpXG5wYXJ0aWNpcGFudCBPVVRcblxub2JzZXJ2YWJsZS0-PnRoZW5PYnNlcnZhYmxlUGlwZTogZXJyb3I6IGVycm9yXG5Ob3RlIG92ZXIgdGhlbk9ic2VydmFibGVQaXBlOiBvblJlamVjdGVkKGVycm9yKVxudGhlbk9ic2VydmFibGVQaXBlLS0-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)](https://mermaid-js.github.io/mermaid-live-editor/edit/#eyJjb2RlIjoic2VxdWVuY2VEaWFncmFtXG5cbnBhcnRpY2lwYW50IG9ic2VydmFibGVcbnBhcnRpY2lwYW50IHRoZW5PYnNlcnZhYmxlUGlwZSBhcyB0aGVuT2JzZXJ2YWJsZVBpcGUob25GdWxmaWxsZWQsIG9uUmVqZWN0ZWQpXG5wYXJ0aWNpcGFudCBPVVRcblxub2JzZXJ2YWJsZS0-PnRoZW5PYnNlcnZhYmxlUGlwZTogZXJyb3I6IGVycm9yXG5Ob3RlIG92ZXIgdGhlbk9ic2VydmFibGVQaXBlOiBvblJlamVjdGVkKGVycm9yKVxudGhlbk9ic2VydmFibGVQaXBlLS0-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)


### Examples

#### Example 1

```ts
const subscribe = pipe$$(fromFetch(`https://www.w3.org/TR/PNG/iso_8859-1.txt`), [
  then$$$(
    (response: Response): IObservable<IFromPromiseObservableNotifications<string>> => {
      if (response.ok) {
        return fromPromise(response.text());
      } else {
        return throwError(createNetworkError());
      }
    },
    (error: any): IObservable<IDefaultNotificationsUnion<string>> => {
      if (navigator.onLine) {
        return throwError(error);
      } else {
        return singleWithNotifications('Offline');
      }
    }
  ),
]);

subscribe((notification) => {
  console.log(notification.name, notification.value);
});
```

Output (if request succeed):

```text
'next', 'The following are the gr...'
'complete', undefined
```

#### Example 2

```ts
const subscribe = pipe$$(request$, [
  fulfilled$$$((response: Response): IObservable<IFromPromiseObservableNotifications<string>> => {
    if (response.ok) {
      return fromPromise(response.text());
    } else {
      return throwError(createNetworkError());
    }
  }),
]);

subscribe((notification) => {
  console.log(notification.name, notification.value);
});
```

Output (if request succeed):

```text
'next', 'The following are the gr...'
'complete', undefined
```


#### Example 3

```ts
const subscribe = pipe$$(throwError(new Error(`Rejected`)), [
  rejected$$$((error: any): IObservable<IDefaultNotificationsUnion<string>> => {
    if (navigator.onLine) {
      return throwError(error);
    } else {
      return singleWithNotifications('Offline');
    }
  }),
]);

subscribe((notification) => {
  console.log(notification.name, notification.value);
});
```

Output (if browser is online):

```text
'error', Error(`Rejected`)
```

Output (if browser is offline):

```text
'next', 'Offline'
'complete', undefined
```

#### Example 4

```ts
const subscribe = pipe$$(request$, [
  finally$$$((): IObservable<IEmptyObservableNotifications> => {
    return mergeMapS$$(timeout(2000), () => emptyWithNotifications());
  }),
]);

subscribe((notification) => {
  console.log(notification.name, notification.value);
});
```

Output:

```text
// request
// 2000ms
'next', Response
'complete', undefined
```