The Rich Media Preview Extension allows the developer to generate rich preview panels for all the popular sites. This extension fetches the first URL from the message for the generation of a preview.

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Before you begin

  1. Sign up with Iframely.
  2. Get their API key to configure the extension.

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Extension settings

  1. Login to CometChat and select your app.
  2. Go to the Extensions section and enable the Rich Media Preview extension.
  3. Open the Settings for this extension.
  4. Enter the iFramely API Key.
  5. Save your settings.

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How does it work?

If the text message contains a URL, the extension will create a Preview using your iFramely credentials. These details can then be used to show a nice preview card for that URL. The information about the Preview will be updated later for the message and hence you need to implement the onMessageEdited listener. Please check our Edit message documentation under the SDK of your choice. Here is a sample response (for https://stackoverflow.com): 
"@injected": {
  "extensions": {
    "rich-media": {
      "url": "https://stackoverflow.com",
        "meta": {
        "description": "Stack Overflow | The World’s Largest Online Community for Developers",
          "title": "Stack Overflow - Where Developers Learn, Share, & Build Careers",
            "canonical": "https://stackoverflow.com/",
              "site": "Stack Overflow"
      },
      "links": {
        "thumbnail": [
          {
            "href": "https://cdn.sstatic.net/Sites/stackoverflow/Img/apple-touch-icon@2.png?v=73d79a89bded",
            "type": "image/png",
            "rel": [
              "thumbnail",
              "og",
              "ssl"
            ],
            "content_length": 6562,
            "media": {
              "width": 316,
              "height": 316
            }
          },
          {
            "href": "https://cdn.sstatic.net/Sites/stackoverflow/Img/apple-touch-icon.png?v=c78bd457575a",
            "rel": [
              "thumbnail",
              "ssl",
              "apple-touch-icon",
              "icon"
            ],
            "type": "image/png"
          }
        ],
          "icon": [
            {
              "href": "https://cdn.sstatic.net/Sites/stackoverflow/Img/apple-touch-icon.png?v=c78bd457575a",
              "rel": [
                "thumbnail",
                "ssl",
                "apple-touch-icon",
                "icon"
              ],
              "type": "image/png"
            },
            {
              "href": "https://cdn.sstatic.net/Sites/stackoverflow/Img/favicon.ico?v=ec617d715196",
              "rel": [
                "shortcut",
                "icon",
                "ssl"
              ],
              "type": "image/icon"
            }
          ]
      },
      "rel": [
        "summary",
        "ssl",
        "html5",
        "inline"
      ],
        "html": "<div class=\"iframely-embed\"><div class=\"iframely-responsive\" style=\"height: 140px; padding-bottom: 0;\"><a href=\"https://stackoverflow.com/\" data-iframely-url=\"//cdn.iframe.ly/api/iframe?url=https%3A%2F%2Fstackoverflow.com&key=eda089f6090d00a60bba3ab368d2a3e6\"></a></div></div><script async src=\"//cdn.iframe.ly//embed.js\" charset=\"utf-8\"></script>"
    }
  }
}

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Implementation

At the recipients’ end, from the message object, you can fetch the metadata by calling the getMetadata() method. Using this metadata, you can fetch the Rich Media Embed. 
var metadata = message.getMetadata();
if (metadata != null) {
  var injectedObject = metadata["@injected"];
  if (injectedObject != null && injectedObject.hasOwnProperty("extensions")) {
    var extensionsObject = injectedObject["extensions"];
    if (extensionsObject != null && extensionsObject.hasOwnProperty("rich-media")) {
      var richMediaObject = extensionsObject["rich-media"];
    }
  }
}