RatingManipulations

ChangeRating.cs

class ChangeRating
{
	bool hasUserRated = false;
	Random random = new Random();
	int sumOfRatings = 0;
	int userRatingIndex = 0;
	int numberOfTries = 5;
	float newAverageRating = 0;
	int numberOfRatings = 0;
	string newRatingsFromUser = string.Empty;
	string newRatings = string.Empty;
	List<FieldUserValue> newUsersRated = new List<FieldUserValue>();
	public void NewRatings(ClientContext clientContext, List list, ListItem item, User user)
	{
		Console.Clear();
		Console.WriteLine("Site: " + clientContext.Web.Title);
		Console.WriteLine("List: " + list.Title);
		Console.WriteLine("Item: " + item.DisplayName);
		Console.WriteLine("User: " + user.Title);
		Console.WriteLine();
		FieldUserValue[] ratedUsers = item["RatedBy"] as FieldUserValue[];
		if (ratedUsers != null)
			for (int i = 0; i < ratedUsers.Length; i++)
				if (ratedUsers[i].LookupValue == user.Title)
				{
					userRatingIndex = i;
					hasUserRated = true;
					break;
				}
		if (hasUserRated)
			Rerate(item, user);
		else
			Rate(item, user, ratedUsers);
		Console.WriteLine("Users Rating " + newRatingsFromUser + ",\n Ratings= " + newRatings + "\n Ratings Count= " + numberOfRatings + ",\n Average Ratings= " + newAverageRating);
		item.Update();
	}

	//function to re-rate or skip rating the item
	private void Rerate(ListItem item, User user)
	{
		int randomStarRating = random.Next(1, 5);
		string[] ratings = item["Ratings"].ToString().Split(',');
		numberOfRatings = int.Parse(item["RatingCount"].ToString());
		string ratedValue = ratings[userRatingIndex];
		Console.WriteLine("The User " + user.Title + " has already Rated the item with " + ratedValue + " star Rating\n Do you want to enter new Rating Y/N");
		string reRate = Console.ReadLine();
		if (reRate == "y" || reRate == "Y" || reRate == "yes" || reRate == "Yes")
		{
			for (int i = 0; i < numberOfRatings; i++)
				if (i == userRatingIndex)
				{
					Console.WriteLine("Enter the new Star Rating or skip(EnterKey) to generate Random Star Rating");
					string skipReadingRatings = Console.ReadLine();
					do
					{
						if (skipReadingRatings == "" || numberOfTries == 1)
						{
							newRatingsFromUser = randomStarRating.ToString();
							newRatings += newRatingsFromUser + ",";
							sumOfRatings += randomStarRating;
						}
						else
						{
							newRatingsFromUser = skipReadingRatings;
							if (newRatingsFromUser == "1" || newRatingsFromUser == "2" || newRatingsFromUser == "3" || newRatingsFromUser == "4" || newRatingsFromUser == "5")
							{
								newRatings += newRatingsFromUser + ",";
								sumOfRatings += int.Parse(newRatingsFromUser);
							}
							else
							{
								Console.WriteLine("The ratings entered is incorrect please enter numbers from 1 to 5 only\nOr\n skip(EnterKey) to generate Random Star Rating");
								skipReadingRatings = Console.ReadLine();
							}
						}
						numberOfTries--;
					} while (newRatingsFromUser != "1" && newRatingsFromUser != "2" && newRatingsFromUser != "3" && newRatingsFromUser != "4" && newRatingsFromUser != "5" && skipReadingRatings != "" && numberOfTries != 0);
				}
				else
				{
					newRatings += ratings[i] + ",";
					sumOfRatings += int.Parse(ratings[i].ToString());
				}
			item["Ratings"] = newRatings;
			item["AverageRating"] = (float)(sumOfRatings / numberOfRatings);
		}
		else
		{
			newRatingsFromUser = ratedValue;
			newRatings = item["Ratings"].ToString();
			newAverageRating = float.Parse(item["AverageRating"].ToString());
		}
	}

	//Function To rate the item
	private void Rate(ListItem item, User user, FieldUserValue[] ratedUsers)
	{
		int randomStarRating = random.Next(1, 5);
		string[] ratings = item["Ratings"] != null ? item["Ratings"].ToString().Split(',') : null;
		newRatings = item["Ratings"] != null ? item["Ratings"].ToString() : string.Empty;
		newAverageRating = item["AverageRating"] == null ? 0 : float.Parse(item["AverageRating"].ToString());
		numberOfRatings = item["RatingCount"] == null ? 0 : int.Parse(item["RatingCount"].ToString());
		Console.WriteLine("The User " + user.Title + " has not Rated the item.\n Enter the new Star Rating or skip(EnterKey) to generate Random Star Rating");
		string skip = Console.ReadLine();
		do
		{
			if (skip == "" || numberOfTries == 1)
			{
				newRatingsFromUser = randomStarRating.ToString();
				newRatings += newRatingsFromUser + ",";
				newAverageRating = ((newAverageRating * numberOfRatings) + randomStarRating) / (numberOfRatings + 1);
				//or
				//newAverageRating = newAverageRating + ((randomStarRating - newAverageRating) / (numberOfRatings + 1));
			}
			else
			{
				newRatingsFromUser = skip;
				if (newRatingsFromUser == "1" || newRatingsFromUser == "2" || newRatingsFromUser == "3" || newRatingsFromUser == "4" || newRatingsFromUser == "5")
				{
					newRatings += newRatingsFromUser + ",";
					sumOfRatings += int.Parse(newRatingsFromUser);
					newAverageRating = ((newAverageRating * numberOfRatings) + int.Parse(newRatingsFromUser)) / (numberOfRatings + 1);
				}
				else
				{
					Console.WriteLine("The ratings entered is incorrect please enter numbers from 1 to 5 only or skip(EnterKey) to generate Random Star Rating");
					skip = Console.ReadLine();
				}
			}
			numberOfTries--;
		} while (newRatingsFromUser != "1" && newRatingsFromUser != "2" && newRatingsFromUser != "3" && newRatingsFromUser != "4" && newRatingsFromUser != "5" && skip != ""&& numberOfTries != 0);
		numberOfRatings += 1;
		item["RatingCount"] = numberOfRatings.ToString();
		item["Ratings"] = newRatings;
		item["AverageRating"] = newAverageRating.ToString();
		if (ratedUsers != null)
			foreach (FieldUserValue ratedUser in ratedUsers)
				newUsersRated.Add(ratedUser);
		newUsersRated.Add(FieldUserValue.FromUser(user.LoginName));
		item["RatedBy"] = newUsersRated;
	}
}