Runner_Iceland_2019/Assets/Core/Versioning/VersionChecker.cs

using UnityEngine;
using System;
using System.Collections;

/// <summary>
/// This component will ask the server what is the latest version. The client will send the app version, platform and language,
/// and the server will reply accordingly.
/// If there is an update available, it will fire a ClientUpdateAvailable notification, with VersionInfo
/// The VersionInfo will contain the version number, what's new and if it is a forced update.
///
/// This component should be placed on an active gameObject in the hierarchy
/// </summary>
public class VersionChecker : MonoBehaviour
{
	//DO NOT FILL THIS MANUALLY. THIS IS AUTOMATICALLY READ FROM PlayerSettings.BundleVersion
	//THROUGH AV/Build
	public const string BUNDLE_VERSION_NUMBER_FROM_PLAYER_SETTINGS = "1.0";
	private const string CACHED_VERSION_KEY = "cachedVersion";

	static float _localVersion = -1f;
	public static float LocalVersion
	{
		get
		{
			if (_localVersion == -1f)
			{
				if (!float.TryParse(BUNDLE_VERSION_NUMBER_FROM_PLAYER_SETTINGS, out _localVersion))
				{
					_localVersion = 1;
					AVDebug.LogError("Error parsing BUNDLE_VERSION_NUMBER_FROM_PLAYER_SETTINGS, must be a float: "+BUNDLE_VERSION_NUMBER_FROM_PLAYER_SETTINGS);
				}
			}
			return _localVersion;
		}
	}

	public void Check(string language)
	{
		StartCoroutine(CheckCoroutine(language));
	}

	IEnumerator CheckCoroutine(string language)
	{
		string platform;
		#if UNITY_EDITOR || DEBUG
		{
			platform = "Testing";
		}
		#elif UNITY_WEBPLAYER
		{
			platform = "Web";
		}
		#elif UNITY_IPHONE
		{
			platform = "iOS";
		}
		#elif UNITY_ANDROID
		{
			platform = "Android";
		}
		#else
		{
			AVDebug.LogError("Unsupported platform");
			yield break;
		}
		#endif

		WWW www = new WWW(string.Format("{0}version.php?platform={1}&client={2}&language={3}", GameConstants.SERVER_BASE_URL, platform, LocalVersion, language));

		yield return www;
		
		if (www.error == null)
		{
			PlayerPrefs.SetString(CACHED_VERSION_KEY, www.text);
			PlayerPrefs.Save();
			ParseVersionUpdate(www.text);
		} else
		{
			AVDebug.LogWarning("Error while retrieving game version from server (using cached version) : " + www.error);
			if (PlayerPrefs.HasKey(CACHED_VERSION_KEY))
			{
				ParseVersionUpdate(PlayerPrefs.GetString(CACHED_VERSION_KEY));
			}
		}
	}

	void ParseVersionUpdate(string s)
	{
		string[] tokens = s.Split('\n');
		VersionInfo versionInfo;
		if (!float.TryParse(tokens[0], out versionInfo.version))
		{
			AVDebug.LogError("Error parsing remote version, must be a float : "+tokens[0]);
		}
		if (LocalVersion >= versionInfo.version)
		{
			//client is up to date
			return;
		}
		versionInfo.forceUpdate = tokens[1] == "ForceUpdate";
		versionInfo.whatsNew = tokens[2];

		CoreNotificationCenter.Post(CoreNotificationType.ClientUpdateAvailable, versionInfo);
	}
}