Link and Content service

The Link and Content service allows a tool to manage the links and content-items which have been created for it with a platform.

The Link and Content service class offers the following methods:

• for context-level endpoints:
  • getAll - gets all the links and content-items for the tool in the context, and allows the following optional parameter:
    • $ltiResourceLinkId - limit the information to ones which are associated with the specified resource link
    • $limit - used to limit the number of group sets or groups are requested to be included in each response
  • createContentItem - create a new link or content-item in the context
• for item-level endpoints:
  • get - get the item
  • saveContentItem - update the item
  • deleteContentItem - delete the item

Examples

Obtain all the items for a context

$limit = null;  // An optional limit on each response can be set

$items = $context->getContentItems($limit);

The default limit for the size of response pages from the platform can be overridden by changing the value of the Service\LinkContent::$defaultLimit property. The limit only affects the number of requests made to the platform; all of the items will always be returned.

Obtain the item for a resource link

$contentItem = $resourceLink->getContentItem();

The value of $item will be false if the request was not successful.

Obtain the item from its endpoint (id)

use ceLTIc\LTI\ContentItem\ContentItem;

$contentItem = ContentItem::fromEndpoint($platform, $endpoint);

The value of $item will be false if the request was not successful.

Create a new item in a context

use ceLTIc\LTI\Content\Item;
use ceLTIc\LTI\ContentItem\ContentItem;

$contentItem = ContentItem::fromType(Item::TYPE_LTI_LINK);  // Sample content-item to be created
$item = $contentItem->getItem();
$item->setTitle('A new LTI link');
$item->setText('This link was created automatically by the tool.');
$item->setUrl('');
$item->addCustom('username', '$User.username');

$ok = $context->createContentItem($contentItem);

Update an item

use ceLTIc\LTI\ContentItem\ContentItem;

$item = $contentItem->getItem();
$item->title = 'A new title';
$linkContentService->saveContentItem($contentItem);

Delete an item

For the content-item represented by a resource link object:

$ok = $resourceLink->deleteContentItem();

For a content-item known by its id (endpoint):

$ok = $contentItem->delete($platform);