[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/README.md

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+---
+---
+
+# Tutorials
+
+Learn more about developing with the Alfresco Content Application.
+
+## Contents
+
+- [Introduction to extending ACA](/tutorials/introduction-to-extending)
+- [Custom route with parameters](/tutorials/custom-route-with-parameters)
+- [Dialog actions](/tutorials/dialog-actions)

docs/tutorials/custom-route-with-parameters.md

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+---
+---
+
+# Custom route with parameters
+
+In this tutorial, we are going to implement the following features:
+
+- Update the **Trashcan** component to receive and log route parameters.
+- Create a new route that points to the **Trashcan** component and uses the main layout.
+- Create an action reference that allows redirecting to the new route.
+- Create a button in the **New** menu that invokes an action.
+
+Update `src/app/components/trashcan/trashcan.component.ts` and append the following code to the `ngOnInit` body:
+
+```typescript
+import { ActivatedRoute, Params } from '@angular/router';
+
+@Component({...})
+export class TrashcanComponent {
+
+    constructor(
+        // ...
+        private route: ActivatedRoute
+    ) {}
+
+    ngOnInit() {
+        // ...
+
+        this.route.params.subscribe(({ nodeId }: Params) => {
+            console.log('node: ', nodeId);
+        });
+    }
+
+}
+```
+
+The code above logs the current route parameters to the browser console
+and is proof the integration works as expected.
+
+Next, add a new route definition as in the example below:
+
+```json
+{
+  "$schema": "../../../extension.schema.json",
+  "$version": "1.0.0",
+  "$name": "plugin1",
+
+  "routes": [
+    {
+      "id": "custom.routes.trashcan",
+      "path": "ext/trashcan/:nodeId",
+      "component": "your.component.id",
+      "layout": "app.layout.main",
+      "auth": ["app.auth"]
+    }
+  ]
+}
+```
+
+The template above creates a new route reference with the id `custom.routes.trashcan` that points to the `ext/trashcan/` route and accepts the `nodeId` parameter.
+
+Also, we are going to use the default application layout (`app.layout.main`)
+and authentication guards (`app.auth`).
+
+Next, create an action reference for the `NAVIGATE_ROUTE` application action
+and pass route parameters: `/ext/trashcan` for the path, and `10` for the `nodeId` value.
+
+```json
+{
+    "$schema": "../../../extension.schema.json",
+    "$version": "1.0.0",
+    "$name": "plugin1",
+
+    "routes": [...],
+
+    "actions": [
+        {
+            "id": "custom.actions.trashcan",
+            "type": "NAVIGATE_ROUTE",
+            "payload": "$(['/ext/trashcan', '10'])"
+        }
+    ]
+}
+```
+
+Finally, declare a new menu item for the `NEW` button and use the `custom.actions.trashcan` action created above.
+
+```json
+{
+    "$schema": "../../../extension.schema.json",
+    "$version": "1.0.0",
+    "$name": "plugin1",
+
+    "routes": [...],
+    "actions": [...],
+
+    "features": {
+        "create": [
+            {
+                "id": "custom.create.trashcan",
+                "type": "default",
+                "icon": "build",
+                "title": "Custom trashcan route",
+                "actions": {
+                    "click": "custom.actions.trashcan"
+                }
+            }
+        ]
+    }
+}
+```
+
+Now, if you run the application, you should see a new menu item called "Custom Trashcan Route" in the "NEW" dropdown.
+Upon clicking this item you should navigate to the `/ext/trashcan/10` route containing a **Trashcan** component.
+
+Check the browser console output and ensure you have the following output:
+
+```text
+node:  10
+```
+
+You have successfully created a new menu button that invokes your custom action
+and redirects you to the extra application route.

docs/tutorials/dialog-actions.md

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+---
+---
+
+# 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.

docs/tutorials/introduction-to-extending.md

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+---
+---
+
+# Introduction to extending the Alfresco Content Application
+
+An introductory tutorial will appear here shortly.