app.config.js

[
			"./plugins/intercom.plugin.js",
				 {
						iosApiKey: "ios key",
						androidApiKey: "android key",
						appId: "app id",
				  }
		],

intercom-plugin.ts

const { createRunOncePlugin, withAppDelegate, AndroidConfig, withMainApplication } = require("@expo/config-plugins")
const { addImports, appendContentsInsideDeclarationBlock } = require("@expo/config-plugins/build/android/codeMod")
const { addObjcImports, insertContentsInsideObjcFunctionBlock } = require("@expo/config-plugins/build/ios/codeMod")

const mainApplication = (_config, props) =>
	withMainApplication(_config, (config) => {
		let stringContents = config.modResults.contents

		stringContents = addImports(stringContents, ["com.intercom.reactnative.IntercomModule;"], false)
		stringContents = appendContentsInsideDeclarationBlock(
			stringContents,
			"onCreate",
			`IntercomModule.initialize(this, "${props.androidApiKey}", "${props.appId}");`,
		)

		config.modResults.contents = stringContents

		return config
	})

const androidManifest = (_config) =>
	AndroidConfig.Permissions.withPermissions(
		_config,
		["android.permission.READ_EXTERNAL_STORAGE", "android.permission.VIBRATE"].filter(Boolean),
	)

const withIntercomAndroid = (config, props) => {
	let newConfig = config
	newConfig = mainApplication(newConfig, props)
	newConfig = androidManifest(newConfig)
	return newConfig
}

const appDelegate = (_config, props) =>
	withAppDelegate(_config, (config) => {
		let stringContents = config.modResults.contents

		stringContents = addObjcImports(stringContents, ["<IntercomModule.h>"])
		stringContents = insertContentsInsideObjcFunctionBlock(
			stringContents,
			"application didFinishLaunchingWithOptions:",
			`[IntercomModule initialize:@"${props.iosApiKey}" withAppId:@"${props.appId}"];`,
			{ position: "tailBeforeLastReturn" },
		)

		config.modResults.contents = stringContents

		return config
	})

const withIntercomIOS = (config, props) => appDelegate(config, props)

const withIntercom = (config, props) => {
	let newConfig = config
	newConfig = withIntercomAndroid(newConfig, props)
	newConfig = withIntercomIOS(newConfig, props)
	return newConfig
}

module.exports = createRunOncePlugin(withIntercom, "intercom-plugin", "1.0.0")