[ACA-1889] Split Extending section into separate files (#784)

* [ACA-1889] Split Extending section into separate files

* [ACA-1889] Split Extending section into separate files

* [ACA-1889] Added recent changes and then deleted extending.md

* [ACA-1889] Added Tutorials section

docs/tutorials/dialog-actions.md

@@ -0,0 +1,153 @@
+---
+---
+
+# Dialog actions
+
+In this tutorial, we are going to create an action that invokes a custom material dialog.
+
+Please read more details on Dialog components here: [Dialog Overview](https://material.angular.io/components/dialog/overview)
+
+## Create a dialog
+
+```sh
+ng g component dialogs/my-extension-dialog --module=app
+```
+
+According to Angular rules, the component needs to also be registered within the `entryComponents` section of the module.
+
+Update the `src/app/app.module.ts` file according to the example below:
+
+```ts
+@NgModule({
+  imports: [...],
+  declarations: [
+    ...,
+    MyExtensionDialogComponent
+  ],
+  entryComponents: [
+    ...,
+    MyExtensionDialogComponent
+  ]
+})
+```
+
+Update `my-extension-dialog.component.ts`:
+
+```ts
+import { Component } from '@angular/core';
+import { MatDialogRef } from '@angular/material';
+
+@Component({
+  selector: 'aca-my-extension-dialog',
+  templateUrl: './my-extension-dialog.component.html',
+  styleUrls: ['./my-extension-dialog.component.scss']
+})
+export class MyExtensionDialogComponent {
+  constructor(public dialogRef: MatDialogRef<MyExtensionDialogComponent>) {}
+}
+```
+
+Update `my-extension-dialog.component.html`:
+
+```html
+<h2 mat-dialog-title>Delete all</h2>
+<mat-dialog-content>Are you sure?</mat-dialog-content>
+<mat-dialog-actions>
+  <button mat-button mat-dialog-close>No</button>
+  <!-- The mat-dialog-close directive optionally accepts a value as a result for the dialog. -->
+  <button mat-button [mat-dialog-close]="true">Yes</button>
+</mat-dialog-actions>
+```
+
+## Create an action
+
+Append the following code to the `src/app/store/actions/app.actions.ts`:
+
+```ts
+export const SHOW_MY_DIALOG = 'SHOW_MY_DIALOG';
+
+export class ShowMydDialogAction implements Action {
+  readonly type = SHOW_MY_DIALOG;
+}
+```
+
+See also:
+
+- [Comprehensive Introduction to @ngrx/store](https://gist.github.com/btroncone/a6e4347326749f938510)
+
+## Create an effect
+
+Update `src/app/store/effects/app.effects.ts`:
+
+```ts
+import { ShowMydDialogAction, SHOW_MY_DIALOG } from '../actions/app.actions';
+
+@Injectable()
+export class AppEffects {
+  constructor(...) {}
+
+  @Effect({ dispatch: false })
+  showMyDialog$ = this.actions$.pipe(
+    ofType<ShowMydDialogAction>(SHOW_MY_DIALOG),
+    map(() => {})
+  );
+
+  // ...
+}
+```
+
+See also:
+
+- [Comprehensive Introduction to @ngrx/store](https://gist.github.com/btroncone/a6e4347326749f938510)
+
+Update to raise a dialog
+
+```ts
+import { MatDialog } from '@angular/material';
+import { MyExtensionDialogComponent } from '../../dialogs/my-extension-dialog/my-extension-dialog.component';
+
+@Injectable()
+export class AppEffects {
+  constructor(
+    ...,
+    private dialog: MatDialog
+  ) {}
+
+  @Effect({ dispatch: false })
+  showMyDialog$ = this.actions$.pipe(
+    ofType<ShowMydDialogAction>(SHOW_MY_DIALOG),
+    map(() => {
+      this.dialog.open(MyExtensionDialogComponent)
+    })
+  );
+
+  ...
+
+}
+```
+
+## Register a toolbar action
+
+Update the `src/assets/app.extensions.json` file, and insert a new entry to the `features.toolbar` section:
+
+```json
+{
+  ...,
+
+  "features": {
+    "toolbar": [
+      {
+        "id": "my.custom.toolbar.button",
+        "order": 10,
+        "title": "Custom action",
+        "icon": "extension",
+        "actions": {
+          "click": "SHOW_MY_DIALOG"
+        }
+      }
+    ]
+  }
+}
+```
+
+Now, once you run the application, you should see an extra button that invokes your dialog on every click.