ext/afform/docs/embed.md

   1 # Embedding Forms: Afform as reusable building-block
   2
   3 In the [quick-start example](quickstart.md), we registered a new route (`"server_route": "civicrm/hello-world"`) -- this created a
   4 simple, standalone page with the sole purpose of displaying the `helloworld` form.  What if we want to embed the form
   5 somewhere else -- e.g. as a dialog inside an event-listing or membership directory?  Afforms are actually *re-usable
   6 sub-forms*.
   7
   8 How does this work?  Every `afform` is an *AngularJS directive*.  For example, `helloworld` can be embedded with:
   9
  10 ```html
  11 <div afform-helloworld=""></div>
  12 ```
  13
  14 Moreover, you can pass options to `helloworld`:
  15
  16 ```html
  17 <div afform-helloworld="{phaseOfMoon: 'waxing'}"></div>
  18 ```
  19
  20 Now, in `afform/helloworld/layout.html`, you can use `options.phaseOfMoon`:
  21
  22 ```html
  23 Hello, {{routeParams.name}}. The moon is currently {{options.phaseOfMoon}}.
  24 ```
  25
  26 ## Example: Contact record
  27
  28 Is this useful? Let's suppose you're building a contact record page.
  29
  30 First, we should make a few building-blocks:
  31
  32 1. `afform/contactName/layout.html` displays a sub-form for editing first name, lastname, prefix, suffix, etc.
  33 2. `afform/contactAddressess/layout.html` displays a sub-form for editing street addresses.
  34 3. `afform/contactEmails/layout.html` displays a sub-form for editing email addresses.
  35
  36 Next, we should create an overall `afform/contact/layout.html` which uses these building-blocks:
  37
  38 ```html
  39 <div ng-form="contactForm">
  40   <div crm-ui-accordion="{title: ts('Name')}">
  41     <div afform-contact-name="{cid: routeParams.cid}"></div>
  42   </div>
  43   <div crm-ui-accordion="{title: ts('Street Addresses')}">
  44     <div afform-contact-addresses="{cid: routeParams.cid}"></div>
  45   </div>
  46   <div crm-ui-accordion="{title: ts('Emails')}">
  47     <div afform-contact-emails="{cid: routeParams.cid}"></div>
  48   </div>
  49 </div>
  50 ```
  51
  52 > *(FIXME: In the parent form's `meta.json`, we need to manually add `afformContactName`, `afformContactAddresses`, `afformContactEmails` to the `requires` list. We should autodetect these instead.)*
  53
  54 What does this buy us?  It means that a downstream admin (using APIs/GUIs) can fork `afform/contactName/layout.html` --
  55 but all the other components can cleanly track the canonical release. This significantly reduces the costs and risks
  56 of manging upgrades and changes.