App Shell Component

A web component for building SPAs consisting of one topic with multiple activities. Handles login, language selection, activity switching, menus etc.

You can install this component via npm:

npm i @dbp-toolkit/app-shell

Usage

<script type="module" src="node_modules/@dbp-toolkit/app-shell/dist/dbp-app-shell.js"></script>
<dbp-app-shell src="/example.topic.metadata.json"></dbp-app-shell>

Or directly via CDN:

<script
    type="module"
    src="https://unpkg.com/@dbp-toolkit/[email protected]/dist/dbp-app-shell.js"></script>
<dbp-app-shell src="/example.topic.metadata.json"></dbp-app-shell>

You need Keycloak and other parts to be in place to really make full use of the AppShell. Best take a look on examples like index.html for more explanation.

Attributes

• provider-root (optional): You need to set the provider-root attribute for the app-shell to "terminate" all provider events
  • If you don't want to set the app-shell as provider-root then you need to set the attributes auth, requested-login-status and analytics-event as attribute for the app-shell or in a dbp-provider above it
  • example <dbp-app-shell provider-root></dbp-app-shell>
• lang (optional, default: de): set to de or en for German or English
  • example <dbp-app-shell lang="de"></dbp-app-shell>
• src: The path to a topic metadata file (json)
• base-path (optional, default: /): An absolute base path for routing
• entry-point-url: Entry point URL to access the API
• keycloak-config: An object with the following keys: url, realm, clientId, silentCheckSsoRedirectUri, scope
• matomo-url (optional): set to your Matomo server (required only for tracking)
  • example <dbp-app-shell matomo-url="https://my-matomo.tld"></dbp-app-shell>
• matomo-site-id (optional): set to your site id (required only for tracking)
  • example <dbp-app-shell matomo-site-id="456789"></dbp-app-shell>
• no-welcome-page (optional): skips the welcome page and welcome page isn't visible in menu
  • example <dbp-app-shell no-welcome-page></dbp-app-shell>
• routing-url (optional): the property can be sent by an activity with sendSetPropertyEvent to change the routing
  • for example if at the URL https://server.com/en/activity-name a routing-url of path?query=1#hash would result in a URL change to https://server.com/en/activity-name/path?query=1#hash, this would then in turn trigger a sending out of a routing-url attribute (see below)
• routing-base-url (optional): the base URL for the activity. Should be an absolute URL which loads the currently active activity.

Emitted attributes

The component emits dbp-set-property events for these attributes:

lang

The attribute lang is emitted to propagate a language change. Possible values are en and de.

requested-login-status

The attribute requested-login-status is emitted to propagate whether a user is logged in or not Possible values are logged-in and logged-out.

routing-url

The attribute routing-url is emitted to propagate a routing change. The value is the new part of URL after the activity name.

For example for the URL https://myhost.com/en/render-form/demo-form/123?test1=2&test2=7#testHash it would be demo-form/123?test1=2&test2=7#testHash.

The routing-url is integrated directly in DBPLitElement and this.getRoutingData() can be used to get the structured data.

In this example this.getRoutingData() would return:

{
    "pathname": "/demo-form/123",
    "pathSegments": ["demo-form", "123"],
    "queryParams": {
        "test1": "2",
        "test2": "7"
    },
    "queryString": "?test1=2&test2=7",
    "hash": "#testHash",
    "fragment": "testHash"
}

routing-base-url

The attribute routing-base-url is emitted to propagate a the base URL for the activity i.e. the URL which when loaded will lead to the currently active activity being loaded. Can be used by the activity to set return/callback URLs for API calls. The URL should be an absolute URL.

Example: https://myhost.com/en/render-form

Emitted events

dbp-lang

The component emits a dbp-lang event when the language is changed (for example in the language picker). The details attribute of the event is the language (possible values en, de).

Slots

You use template tags to inject slots into the web component. These templates will be converted to div containers when the page is loaded and will not show up before that.

Unnamed slot

The unnamed slot will be removed when the application is loaded and can be filled with a loading-spinner.

Example: <app-shell><dbp-loading-spinner></dbp-loading-spinner></app-shell>

name

The content of this slot will be shown left in the header and can be used to set a name (e.g. the name of the institution).

Example: <app-shell><template slot="name">TU Graz<br />Graz University of Technology</template></app-shell>

title

The content of this slot will be shown as big h1 headline instead of the name in the topic manifest file.

Example: <app-shell><template slot="title">TU Graz Greenlight</template></app-shell>

logo

The content of this slot will be shown right in the header and can be used to override the logo image.

Example: <app-shell><template slot="logo"><img alt="logo" src="/path/to/logo.png" /></template></app-shell>

header

The content of this slot will override the whole content of the header. You will need to provide your own language selector and auth component.

Example: <app-shell><template slot="header">My custom header</template></app-shell>

footer-links

The content of this slot will override the whole content of the footer link section, for example to set custom links.

Example: <app-shell><template slot="footer-links"><a target="_blank" rel="noopener" class="int-link-external" href="https://my-webpage.com">Link text</a></template></app-shell>

footer

The content of this slot will override the whole content of the footer, for example to set custom links and also overwrite the dbp-build-info tag.

Example: <app-shell><template slot="footer"><a target="_blank" rel="noopener" class="int-link-external" href="https://my-webpage.com">Link text</a></template></app-shell>

Topic Metadata

{
    "name": {
        "de": "Beispiel",
        "en": "Example"
    },
    "short_name": {
        "de": "Beispiel",
        "en": "Example"
    },
    "description": {
        "de": "Ich bin eine Beschreibung der Applikation",
        "en": "I am a description of this application"
    },
    "routing_name": "example",
    "activities": [{"path": "example.metadata.json", "visible": true}],
    "attributes": []
}

Activity Metadata

{
    "element": "dbp-activity-example",
    "module_src": "dbp-activity-example.js",
    "routing_name": "activity-example",
    "name": {
        "de": "Beispielaktivität",
        "en": "Example Activity"
    },
    "short_name": {
        "de": "Beispielaktivität",
        "en": "Example Activity"
    },
    "description": {
        "de": "Eine Beschreibung",
        "en": "A Description"
    }
}

Local development

# get the source
git clone [email protected]:digital-blueprint/toolkit.git
cd toolkit/packages/app-shell

# install dependencies
npm install

# constantly build dist/bundle.js and run a local web-server on port 8002
npm run watch

# run tests
npm test

# build local packages in dist directory
npm run build

Jump to http://localhost:8002 and you should get a Single Sign On login page.