OpenGraphParser

A small and easy to use library which provides the convenience of using Open Graph Protocol in Android very easily. Create previews for links to share in Android very easily.

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https://user-images.githubusercontent.com/52661249/127740097-51535912-6623-48ac-8a3f-7709ac9b968e.mp4

Add this in your root build.gradle at the end of repositories:

	allprojects {
		repositories {
		...
			maven { url 'https://jitpack.io' }
		}
	}

Add the dependency

dependencies {
	   implementation 'com.github.Priyansh-Kedia:OpenGraphParser:<latest_version>'
	}

If using ProGuard add this line to your proguard-rules.pro:

-keep public class org.jsoup.** {  
    public *;  
}

Implementation

private val openGraphParser = OpenGraphParser(this, showNullOnEmpty = true, cacheProvider = OpenGraphCacheProvider(this))

openGraphParser.parse(linkUrl) // To parse the link provided

or you can use the Builder to create the instance of the class if you need to specify additional values. You can do so like this

OpenGraphParser.Builder(listener = this)
        .cacheProvider(OpenGraphCacheProvider(this))
        .showNullOnEmpty(true)
        .maxBodySize(1000000)
        .timeout(1000000)
        .jsoupProxy(JsoupProxy("<host>", 8000))
        .build()

Note: All values can be specified using the default constructor also

Values that can be specified using the Builder pattern are

listener:- Specified here

showNullOnEmpty:- Specified here

cacheProvider:- Specified here

maxBodySize:- max body size to fetch from internet (default 1000000 bytes)

timeout:- timeout for network request (default 60000 ms)

jsoupProxy:- Specify proxy while fetching from internet. This will be an instance of JsoupProxy to specify host and port. See: JsoupProxy

Listener (OpenGraphCallback)

The class requires you to implement two callback functions,onError(error: String) and onPostResponse(openGraphResult: OpenGraphResult). The former is invoked in case of error (incorrect url), and the latter is invoked on successful response.

showNullOnEmpty

The showNullOnEmpty is an optional parameter, with a default value of false. If set to true, the parser would invoke onError if the title and description are empty for the link provided.

CacheProvider

The cacheProvider is also an optional parameter. It can be passed in two ways :-

1. The default OpenGraphCacheProvider, which implements SharedPreferences from the library itself.
2. A custom Shared Preferences class which should implement the interface CacheProvider. The CacheProvider interface provides two callback functions getOpenGraphResult and setOpenGraphResult, where getOpenGraphResult is used to write to the cache, and setOpenGraphResult is used to read from the cache.

Inside onPostResponse(openGraphResult: OpenGraphResult) you can use the data to show on your UI like this.

override fun onPostResponse(openGraphResult: OpenGraphResult) {  
	linkPreviewLayout.apply {  
		Glide.with(this@ChannelActivity).load(openGraphResult.image).into(linkImage)  
		linkTitle.text = openGraphResult.title  
		linkDescription.text = openGraphResult.description  
		website.text = openGraphResult.siteName  
 	}}

OpenGraphResult class

The data class OpenGraphResult contains:

• title -> The title of the page the link points to
• description -> The description metadata of the page
• url -> The url of the page
• image -> The image metadata for the page
• siteName -> The name of the website (BASE URL).
• type -> The type of the object e.g., "video.movie".

JsoupProxy class

The data class JsoupProxy contains:

• host -> The host for the proxy
• port -> The port for the proxy

Contributions

• Fork the repo
• Create a new branch and make changes
• Push the code to the branch and make a PR! :+1:

License

MIT License

Copyright (c) 2021 Priyansh Kedia

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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